Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp @ 6254:a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
Summary: Various cleanups as a prelude to introducing iterators for HeapRegions.
Reviewed-by: johnc, brutisso
| author | tonyp |
|---|---|
| date | Thu, 19 Jul 2012 15:15:54 -0700 |
| parents | 3a431b605145 |
| children | aaf61e68b255 |
| rev | line source |
|---|---|
| 342 | 1 /* |
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2 * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved. |
| 342 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 342 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "code/icBuffer.hpp" | |
| 27 #include "gc_implementation/g1/bufferingOopClosure.hpp" | |
| 28 #include "gc_implementation/g1/concurrentG1Refine.hpp" | |
| 29 #include "gc_implementation/g1/concurrentG1RefineThread.hpp" | |
| 30 #include "gc_implementation/g1/concurrentMarkThread.inline.hpp" | |
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31 #include "gc_implementation/g1/g1AllocRegion.inline.hpp" |
| 1972 | 32 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" |
| 33 #include "gc_implementation/g1/g1CollectorPolicy.hpp" | |
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34 #include "gc_implementation/g1/g1ErgoVerbose.hpp" |
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35 #include "gc_implementation/g1/g1EvacFailure.hpp" |
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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 // perm gen (or null) |
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467 return false; |
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468 } else { |
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469 return !hr->isHumongous(); |
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470 } |
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471 } |
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472 |
| 342 | 473 void G1CollectedHeap::check_ct_logs_at_safepoint() { |
| 474 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
| 475 CardTableModRefBS* ct_bs = (CardTableModRefBS*)barrier_set(); | |
| 476 | |
| 477 // Count the dirty cards at the start. | |
| 478 CountNonCleanMemRegionClosure count1(this); | |
| 479 ct_bs->mod_card_iterate(&count1); | |
| 480 int orig_count = count1.n(); | |
| 481 | |
| 482 // First clear the logged cards. | |
| 483 ClearLoggedCardTableEntryClosure clear; | |
| 484 dcqs.set_closure(&clear); | |
| 485 dcqs.apply_closure_to_all_completed_buffers(); | |
| 486 dcqs.iterate_closure_all_threads(false); | |
| 487 clear.print_histo(); | |
| 488 | |
| 489 // Now ensure that there's no dirty cards. | |
| 490 CountNonCleanMemRegionClosure count2(this); | |
| 491 ct_bs->mod_card_iterate(&count2); | |
| 492 if (count2.n() != 0) { | |
| 493 gclog_or_tty->print_cr("Card table has %d entries; %d originally", | |
| 494 count2.n(), orig_count); | |
| 495 } | |
| 496 guarantee(count2.n() == 0, "Card table should be clean."); | |
| 497 | |
| 498 RedirtyLoggedCardTableEntryClosure redirty; | |
| 499 JavaThread::dirty_card_queue_set().set_closure(&redirty); | |
| 500 dcqs.apply_closure_to_all_completed_buffers(); | |
| 501 dcqs.iterate_closure_all_threads(false); | |
| 502 gclog_or_tty->print_cr("Log entries = %d, dirty cards = %d.", | |
| 503 clear.calls(), orig_count); | |
| 504 guarantee(redirty.calls() == clear.calls(), | |
| 505 "Or else mechanism is broken."); | |
| 506 | |
| 507 CountNonCleanMemRegionClosure count3(this); | |
| 508 ct_bs->mod_card_iterate(&count3); | |
| 509 if (count3.n() != orig_count) { | |
| 510 gclog_or_tty->print_cr("Should have restored them all: orig = %d, final = %d.", | |
| 511 orig_count, count3.n()); | |
| 512 guarantee(count3.n() >= orig_count, "Should have restored them all."); | |
| 513 } | |
| 514 | |
| 515 JavaThread::dirty_card_queue_set().set_closure(_refine_cte_cl); | |
| 516 } | |
| 517 | |
| 518 // Private class members. | |
| 519 | |
| 520 G1CollectedHeap* G1CollectedHeap::_g1h; | |
| 521 | |
| 522 // Private methods. | |
| 523 | |
| 2152 | 524 HeapRegion* |
| 2361 | 525 G1CollectedHeap::new_region_try_secondary_free_list() { |
| 2152 | 526 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
| 527 while (!_secondary_free_list.is_empty() || free_regions_coming()) { | |
| 528 if (!_secondary_free_list.is_empty()) { | |
| 529 if (G1ConcRegionFreeingVerbose) { | |
| 530 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
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531 "secondary_free_list has %u entries", |
| 2152 | 532 _secondary_free_list.length()); |
| 533 } | |
| 534 // It looks as if there are free regions available on the | |
| 535 // secondary_free_list. Let's move them to the free_list and try | |
| 536 // again to allocate from it. | |
| 537 append_secondary_free_list(); | |
| 538 | |
| 539 assert(!_free_list.is_empty(), "if the secondary_free_list was not " | |
| 540 "empty we should have moved at least one entry to the free_list"); | |
| 541 HeapRegion* res = _free_list.remove_head(); | |
| 542 if (G1ConcRegionFreeingVerbose) { | |
| 543 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 544 "allocated "HR_FORMAT" from secondary_free_list", | |
| 545 HR_FORMAT_PARAMS(res)); | |
| 546 } | |
| 547 return res; | |
| 548 } | |
| 549 | |
| 550 // Wait here until we get notifed either when (a) there are no | |
| 551 // more free regions coming or (b) some regions have been moved on | |
| 552 // the secondary_free_list. | |
| 553 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
| 554 } | |
| 555 | |
| 556 if (G1ConcRegionFreeingVerbose) { | |
| 557 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 558 "could not allocate from secondary_free_list"); | |
| 559 } | |
| 560 return NULL; | |
| 561 } | |
| 562 | |
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563 HeapRegion* G1CollectedHeap::new_region(size_t word_size, bool do_expand) { |
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564 assert(!isHumongous(word_size) || word_size <= HeapRegion::GrainWords, |
| 2152 | 565 "the only time we use this to allocate a humongous region is " |
| 566 "when we are allocating a single humongous region"); | |
| 567 | |
| 568 HeapRegion* res; | |
| 569 if (G1StressConcRegionFreeing) { | |
| 570 if (!_secondary_free_list.is_empty()) { | |
| 571 if (G1ConcRegionFreeingVerbose) { | |
| 572 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 573 "forced to look at the secondary_free_list"); | |
| 574 } | |
| 2361 | 575 res = new_region_try_secondary_free_list(); |
| 2152 | 576 if (res != NULL) { |
| 577 return res; | |
| 578 } | |
| 579 } | |
| 580 } | |
| 581 res = _free_list.remove_head_or_null(); | |
| 582 if (res == NULL) { | |
| 583 if (G1ConcRegionFreeingVerbose) { | |
| 584 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 585 "res == NULL, trying the secondary_free_list"); | |
| 586 } | |
| 2361 | 587 res = new_region_try_secondary_free_list(); |
| 2152 | 588 } |
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589 if (res == NULL && do_expand && _expand_heap_after_alloc_failure) { |
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590 // Currently, only attempts to allocate GC alloc regions set |
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591 // do_expand to true. So, we should only reach here during a |
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592 // safepoint. If this assumption changes we might have to |
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593 // reconsider the use of _expand_heap_after_alloc_failure. |
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594 assert(SafepointSynchronize::is_at_safepoint(), "invariant"); |
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595 |
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596 ergo_verbose1(ErgoHeapSizing, |
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597 "attempt heap expansion", |
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598 ergo_format_reason("region allocation request failed") |
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599 ergo_format_byte("allocation request"), |
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600 word_size * HeapWordSize); |
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601 if (expand(word_size * HeapWordSize)) { |
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602 // Given that expand() succeeded in expanding the heap, and we |
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603 // always expand the heap by an amount aligned to the heap |
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604 // region size, the free list should in theory not be empty. So |
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605 // it would probably be OK to use remove_head(). But the extra |
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606 // check for NULL is unlikely to be a performance issue here (we |
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607 // just expanded the heap!) so let's just be conservative and |
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608 // use remove_head_or_null(). |
| 3766 | 609 res = _free_list.remove_head_or_null(); |
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610 } else { |
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611 _expand_heap_after_alloc_failure = false; |
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612 } |
| 342 | 613 } |
| 614 return res; | |
| 615 } | |
| 616 | |
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617 uint G1CollectedHeap::humongous_obj_allocate_find_first(uint num_regions, |
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618 size_t word_size) { |
| 2361 | 619 assert(isHumongous(word_size), "word_size should be humongous"); |
| 620 assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); | |
| 621 | |
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622 uint first = G1_NULL_HRS_INDEX; |
| 2152 | 623 if (num_regions == 1) { |
| 624 // Only one region to allocate, no need to go through the slower | |
| 625 // path. The caller will attempt the expasion if this fails, so | |
| 626 // let's not try to expand here too. | |
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627 HeapRegion* hr = new_region(word_size, false /* do_expand */); |
| 2152 | 628 if (hr != NULL) { |
| 629 first = hr->hrs_index(); | |
| 630 } else { | |
| 3766 | 631 first = G1_NULL_HRS_INDEX; |
| 2152 | 632 } |
| 633 } else { | |
| 634 // We can't allocate humongous regions while cleanupComplete() is | |
| 635 // running, since some of the regions we find to be empty might not | |
| 636 // yet be added to the free list and it is not straightforward to | |
| 637 // know which list they are on so that we can remove them. Note | |
| 638 // that we only need to do this if we need to allocate more than | |
| 639 // one region to satisfy the current humongous allocation | |
| 640 // request. If we are only allocating one region we use the common | |
| 641 // region allocation code (see above). | |
| 642 wait_while_free_regions_coming(); | |
| 2361 | 643 append_secondary_free_list_if_not_empty_with_lock(); |
| 2152 | 644 |
| 645 if (free_regions() >= num_regions) { | |
| 3766 | 646 first = _hrs.find_contiguous(num_regions); |
| 647 if (first != G1_NULL_HRS_INDEX) { | |
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648 for (uint i = first; i < first + num_regions; ++i) { |
| 3766 | 649 HeapRegion* hr = region_at(i); |
| 2152 | 650 assert(hr->is_empty(), "sanity"); |
| 2361 | 651 assert(is_on_master_free_list(hr), "sanity"); |
| 2152 | 652 hr->set_pending_removal(true); |
| 653 } | |
| 654 _free_list.remove_all_pending(num_regions); | |
| 655 } | |
| 656 } | |
| 657 } | |
| 658 return first; | |
| 659 } | |
| 660 | |
| 2361 | 661 HeapWord* |
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662 G1CollectedHeap::humongous_obj_allocate_initialize_regions(uint first, |
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663 uint num_regions, |
| 2361 | 664 size_t word_size) { |
| 3766 | 665 assert(first != G1_NULL_HRS_INDEX, "pre-condition"); |
| 2361 | 666 assert(isHumongous(word_size), "word_size should be humongous"); |
| 667 assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); | |
| 668 | |
| 669 // Index of last region in the series + 1. | |
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670 uint last = first + num_regions; |
| 2361 | 671 |
| 672 // We need to initialize the region(s) we just discovered. This is | |
| 673 // a bit tricky given that it can happen concurrently with | |
| 674 // refinement threads refining cards on these regions and | |
| 675 // potentially wanting to refine the BOT as they are scanning | |
| 676 // those cards (this can happen shortly after a cleanup; see CR | |
| 677 // 6991377). So we have to set up the region(s) carefully and in | |
| 678 // a specific order. | |
| 679 | |
| 680 // The word size sum of all the regions we will allocate. | |
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681 size_t word_size_sum = (size_t) num_regions * HeapRegion::GrainWords; |
| 2361 | 682 assert(word_size <= word_size_sum, "sanity"); |
| 683 | |
| 684 // This will be the "starts humongous" region. | |
| 3766 | 685 HeapRegion* first_hr = region_at(first); |
| 2361 | 686 // The header of the new object will be placed at the bottom of |
| 687 // the first region. | |
| 688 HeapWord* new_obj = first_hr->bottom(); | |
| 689 // This will be the new end of the first region in the series that | |
| 690 // should also match the end of the last region in the seriers. | |
| 691 HeapWord* new_end = new_obj + word_size_sum; | |
| 692 // This will be the new top of the first region that will reflect | |
| 693 // this allocation. | |
| 694 HeapWord* new_top = new_obj + word_size; | |
| 695 | |
| 696 // First, we need to zero the header of the space that we will be | |
| 697 // allocating. When we update top further down, some refinement | |
| 698 // threads might try to scan the region. By zeroing the header we | |
| 699 // ensure that any thread that will try to scan the region will | |
| 700 // come across the zero klass word and bail out. | |
| 701 // | |
| 702 // NOTE: It would not have been correct to have used | |
| 703 // CollectedHeap::fill_with_object() and make the space look like | |
| 704 // an int array. The thread that is doing the allocation will | |
| 705 // later update the object header to a potentially different array | |
| 706 // type and, for a very short period of time, the klass and length | |
| 707 // fields will be inconsistent. This could cause a refinement | |
| 708 // thread to calculate the object size incorrectly. | |
| 709 Copy::fill_to_words(new_obj, oopDesc::header_size(), 0); | |
| 710 | |
| 711 // We will set up the first region as "starts humongous". This | |
| 712 // will also update the BOT covering all the regions to reflect | |
| 713 // that there is a single object that starts at the bottom of the | |
| 714 // first region. | |
| 715 first_hr->set_startsHumongous(new_top, new_end); | |
| 716 | |
| 717 // Then, if there are any, we will set up the "continues | |
| 718 // humongous" regions. | |
| 719 HeapRegion* hr = NULL; | |
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720 for (uint i = first + 1; i < last; ++i) { |
| 3766 | 721 hr = region_at(i); |
| 2361 | 722 hr->set_continuesHumongous(first_hr); |
| 723 } | |
| 724 // If we have "continues humongous" regions (hr != NULL), then the | |
| 725 // end of the last one should match new_end. | |
| 726 assert(hr == NULL || hr->end() == new_end, "sanity"); | |
| 727 | |
| 728 // Up to this point no concurrent thread would have been able to | |
| 729 // do any scanning on any region in this series. All the top | |
| 730 // fields still point to bottom, so the intersection between | |
| 731 // [bottom,top] and [card_start,card_end] will be empty. Before we | |
| 732 // update the top fields, we'll do a storestore to make sure that | |
| 733 // no thread sees the update to top before the zeroing of the | |
| 734 // object header and the BOT initialization. | |
| 735 OrderAccess::storestore(); | |
| 736 | |
| 737 // Now that the BOT and the object header have been initialized, | |
| 738 // we can update top of the "starts humongous" region. | |
| 739 assert(first_hr->bottom() < new_top && new_top <= first_hr->end(), | |
| 740 "new_top should be in this region"); | |
| 741 first_hr->set_top(new_top); | |
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742 if (_hr_printer.is_active()) { |
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743 HeapWord* bottom = first_hr->bottom(); |
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744 HeapWord* end = first_hr->orig_end(); |
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745 if ((first + 1) == last) { |
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746 // the series has a single humongous region |
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747 _hr_printer.alloc(G1HRPrinter::SingleHumongous, first_hr, new_top); |
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748 } else { |
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749 // the series has more than one humongous regions |
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750 _hr_printer.alloc(G1HRPrinter::StartsHumongous, first_hr, end); |
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751 } |
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752 } |
| 2361 | 753 |
| 754 // Now, we will update the top fields of the "continues humongous" | |
| 755 // regions. The reason we need to do this is that, otherwise, | |
| 756 // these regions would look empty and this will confuse parts of | |
| 757 // G1. For example, the code that looks for a consecutive number | |
| 758 // of empty regions will consider them empty and try to | |
| 759 // re-allocate them. We can extend is_empty() to also include | |
| 760 // !continuesHumongous(), but it is easier to just update the top | |
| 761 // fields here. The way we set top for all regions (i.e., top == | |
| 762 // end for all regions but the last one, top == new_top for the | |
| 763 // last one) is actually used when we will free up the humongous | |
| 764 // region in free_humongous_region(). | |
| 765 hr = NULL; | |
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766 for (uint i = first + 1; i < last; ++i) { |
| 3766 | 767 hr = region_at(i); |
| 2361 | 768 if ((i + 1) == last) { |
| 769 // last continues humongous region | |
| 770 assert(hr->bottom() < new_top && new_top <= hr->end(), | |
| 771 "new_top should fall on this region"); | |
| 772 hr->set_top(new_top); | |
|
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773 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, new_top); |
| 2361 | 774 } else { |
| 775 // not last one | |
| 776 assert(new_top > hr->end(), "new_top should be above this region"); | |
| 777 hr->set_top(hr->end()); | |
|
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778 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, hr->end()); |
| 2361 | 779 } |
| 780 } | |
| 781 // If we have continues humongous regions (hr != NULL), then the | |
| 782 // end of the last one should match new_end and its top should | |
| 783 // match new_top. | |
| 784 assert(hr == NULL || | |
| 785 (hr->end() == new_end && hr->top() == new_top), "sanity"); | |
| 786 | |
| 787 assert(first_hr->used() == word_size * HeapWordSize, "invariant"); | |
| 788 _summary_bytes_used += first_hr->used(); | |
| 789 _humongous_set.add(first_hr); | |
| 790 | |
| 791 return new_obj; | |
| 792 } | |
| 793 | |
| 342 | 794 // If could fit into free regions w/o expansion, try. |
| 795 // Otherwise, if can expand, do so. | |
| 796 // Otherwise, if using ex regions might help, try with ex given back. | |
| 1973 | 797 HeapWord* G1CollectedHeap::humongous_obj_allocate(size_t word_size) { |
| 2152 | 798 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
| 799 | |
| 800 verify_region_sets_optional(); | |
| 342 | 801 |
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802 size_t word_size_rounded = round_to(word_size, HeapRegion::GrainWords); |
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803 uint num_regions = (uint) (word_size_rounded / HeapRegion::GrainWords); |
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804 uint x_num = expansion_regions(); |
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805 uint fs = _hrs.free_suffix(); |
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806 uint first = humongous_obj_allocate_find_first(num_regions, word_size); |
| 3766 | 807 if (first == G1_NULL_HRS_INDEX) { |
| 2152 | 808 // The only thing we can do now is attempt expansion. |
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809 if (fs + x_num >= num_regions) { |
|
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810 // If the number of regions we're trying to allocate for this |
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811 // object is at most the number of regions in the free suffix, |
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812 // then the call to humongous_obj_allocate_find_first() above |
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813 // should have succeeded and we wouldn't be here. |
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814 // |
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815 // We should only be trying to expand when the free suffix is |
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816 // not sufficient for the object _and_ we have some expansion |
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817 // room available. |
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818 assert(num_regions > fs, "earlier allocation should have succeeded"); |
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819 |
|
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820 ergo_verbose1(ErgoHeapSizing, |
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821 "attempt heap expansion", |
|
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822 ergo_format_reason("humongous allocation request failed") |
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823 ergo_format_byte("allocation request"), |
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824 word_size * HeapWordSize); |
|
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825 if (expand((num_regions - fs) * HeapRegion::GrainBytes)) { |
| 3766 | 826 // Even though the heap was expanded, it might not have |
| 827 // reached the desired size. So, we cannot assume that the | |
| 828 // allocation will succeed. | |
|
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829 first = humongous_obj_allocate_find_first(num_regions, word_size); |
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|
830 } |
| 2152 | 831 } |
| 832 } | |
| 833 | |
| 2361 | 834 HeapWord* result = NULL; |
| 3766 | 835 if (first != G1_NULL_HRS_INDEX) { |
| 2361 | 836 result = |
| 837 humongous_obj_allocate_initialize_regions(first, num_regions, word_size); | |
| 838 assert(result != NULL, "it should always return a valid result"); | |
|
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|
839 |
|
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|
840 // A successful humongous object allocation changes the used space |
|
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|
841 // information of the old generation so we need to recalculate the |
|
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842 // sizes and update the jstat counters here. |
|
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|
843 g1mm()->update_sizes(); |
| 2152 | 844 } |
| 845 | |
| 846 verify_region_sets_optional(); | |
| 2361 | 847 |
| 848 return result; | |
| 342 | 849 } |
| 850 | |
| 1973 | 851 HeapWord* G1CollectedHeap::allocate_new_tlab(size_t word_size) { |
| 852 assert_heap_not_locked_and_not_at_safepoint(); | |
|
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853 assert(!isHumongous(word_size), "we do not allow humongous TLABs"); |
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|
854 |
|
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|
855 unsigned int dummy_gc_count_before; |
|
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|
856 return attempt_allocation(word_size, &dummy_gc_count_before); |
| 342 | 857 } |
| 858 | |
| 859 HeapWord* | |
| 860 G1CollectedHeap::mem_allocate(size_t word_size, | |
| 1973 | 861 bool* gc_overhead_limit_was_exceeded) { |
| 862 assert_heap_not_locked_and_not_at_safepoint(); | |
| 342 | 863 |
|
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|
864 // Loop until the allocation is satisified, or unsatisfied after GC. |
| 1973 | 865 for (int try_count = 1; /* we'll return */; try_count += 1) { |
| 866 unsigned int gc_count_before; | |
|
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|
867 |
|
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|
868 HeapWord* result = NULL; |
|
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|
869 if (!isHumongous(word_size)) { |
|
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|
870 result = attempt_allocation(word_size, &gc_count_before); |
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871 } else { |
|
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|
872 result = attempt_allocation_humongous(word_size, &gc_count_before); |
|
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|
873 } |
|
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|
874 if (result != NULL) { |
|
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|
875 return result; |
| 342 | 876 } |
| 877 | |
| 878 // Create the garbage collection operation... | |
| 1973 | 879 VM_G1CollectForAllocation op(gc_count_before, word_size); |
| 342 | 880 // ...and get the VM thread to execute it. |
| 881 VMThread::execute(&op); | |
| 1973 | 882 |
| 883 if (op.prologue_succeeded() && op.pause_succeeded()) { | |
| 884 // If the operation was successful we'll return the result even | |
| 885 // if it is NULL. If the allocation attempt failed immediately | |
| 886 // after a Full GC, it's unlikely we'll be able to allocate now. | |
| 887 HeapWord* result = op.result(); | |
| 888 if (result != NULL && !isHumongous(word_size)) { | |
| 889 // Allocations that take place on VM operations do not do any | |
| 890 // card dirtying and we have to do it here. We only have to do | |
| 891 // this for non-humongous allocations, though. | |
| 892 dirty_young_block(result, word_size); | |
| 893 } | |
| 342 | 894 return result; |
| 1973 | 895 } else { |
| 896 assert(op.result() == NULL, | |
| 897 "the result should be NULL if the VM op did not succeed"); | |
| 342 | 898 } |
| 899 | |
| 900 // Give a warning if we seem to be looping forever. | |
| 901 if ((QueuedAllocationWarningCount > 0) && | |
| 902 (try_count % QueuedAllocationWarningCount == 0)) { | |
| 1973 | 903 warning("G1CollectedHeap::mem_allocate retries %d times", try_count); |
| 342 | 904 } |
| 905 } | |
| 1973 | 906 |
| 907 ShouldNotReachHere(); | |
|
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|
908 return NULL; |
| 342 | 909 } |
| 910 | |
|
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|
911 HeapWord* G1CollectedHeap::attempt_allocation_slow(size_t word_size, |
|
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|
912 unsigned int *gc_count_before_ret) { |
|
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|
913 // Make sure you read the note in attempt_allocation_humongous(). |
|
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|
914 |
|
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|
915 assert_heap_not_locked_and_not_at_safepoint(); |
|
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|
916 assert(!isHumongous(word_size), "attempt_allocation_slow() should not " |
|
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|
917 "be called for humongous allocation requests"); |
|
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|
918 |
|
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|
919 // We should only get here after the first-level allocation attempt |
|
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|
920 // (attempt_allocation()) failed to allocate. |
|
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|
921 |
|
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|
922 // We will loop until a) we manage to successfully perform the |
|
abdfc822206f
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|
923 // allocation or b) we successfully schedule a collection which |
|
abdfc822206f
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|
924 // fails to perform the allocation. b) is the only case when we'll |
|
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|
925 // return NULL. |
|
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|
926 HeapWord* result = NULL; |
|
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|
927 for (int try_count = 1; /* we'll return */; try_count += 1) { |
|
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|
928 bool should_try_gc; |
|
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|
929 unsigned int gc_count_before; |
|
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|
930 |
|
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|
931 { |
|
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|
932 MutexLockerEx x(Heap_lock); |
|
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|
933 |
|
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|
934 result = _mutator_alloc_region.attempt_allocation_locked(word_size, |
|
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|
935 false /* bot_updates */); |
|
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|
936 if (result != NULL) { |
|
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|
937 return result; |
|
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|
938 } |
|
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|
939 |
|
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|
940 // If we reach here, attempt_allocation_locked() above failed to |
|
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|
941 // allocate a new region. So the mutator alloc region should be NULL. |
|
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|
942 assert(_mutator_alloc_region.get() == NULL, "only way to get here"); |
|
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|
943 |
|
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|
944 if (GC_locker::is_active_and_needs_gc()) { |
|
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|
945 if (g1_policy()->can_expand_young_list()) { |
|
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|
946 // No need for an ergo verbose message here, |
|
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|
947 // can_expand_young_list() does this when it returns true. |
|
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|
948 result = _mutator_alloc_region.attempt_allocation_force(word_size, |
|
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|
949 false /* bot_updates */); |
|
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|
950 if (result != NULL) { |
|
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|
951 return result; |
|
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|
952 } |
|
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|
953 } |
|
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|
954 should_try_gc = false; |
|
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|
955 } else { |
|
6106
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|
956 // The GCLocker may not be active but the GCLocker initiated |
|
1d478c993020
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|
957 // GC may not yet have been performed (GCLocker::needs_gc() |
|
1d478c993020
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958 // returns true). In this case we do not try this GC and |
|
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959 // wait until the GCLocker initiated GC is performed, and |
|
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|
960 // then retry the allocation. |
|
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961 if (GC_locker::needs_gc()) { |
|
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962 should_try_gc = false; |
|
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|
963 } else { |
|
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|
964 // Read the GC count while still holding the Heap_lock. |
|
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|
965 gc_count_before = total_collections(); |
|
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966 should_try_gc = true; |
|
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|
967 } |
|
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|
968 } |
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969 } |
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970 |
|
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|
971 if (should_try_gc) { |
|
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972 bool succeeded; |
|
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973 result = do_collection_pause(word_size, gc_count_before, &succeeded); |
|
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974 if (result != NULL) { |
|
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975 assert(succeeded, "only way to get back a non-NULL result"); |
|
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|
976 return result; |
|
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|
977 } |
|
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|
978 |
|
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|
979 if (succeeded) { |
|
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980 // If we get here we successfully scheduled a collection which |
|
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981 // failed to allocate. No point in trying to allocate |
|
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982 // further. We'll just return NULL. |
|
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983 MutexLockerEx x(Heap_lock); |
|
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984 *gc_count_before_ret = total_collections(); |
|
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985 return NULL; |
|
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|
986 } |
|
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987 } else { |
|
6106
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988 // The GCLocker is either active or the GCLocker initiated |
|
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989 // GC has not yet been performed. Stall until it is and |
|
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990 // then retry the allocation. |
|
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991 GC_locker::stall_until_clear(); |
|
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992 } |
|
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|
993 |
|
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|
994 // We can reach here if we were unsuccessul in scheduling a |
|
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995 // collection (because another thread beat us to it) or if we were |
|
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996 // stalled due to the GC locker. In either can we should retry the |
|
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|
997 // allocation attempt in case another thread successfully |
|
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|
998 // performed a collection and reclaimed enough space. We do the |
|
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999 // first attempt (without holding the Heap_lock) here and the |
|
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1000 // follow-on attempt will be at the start of the next loop |
|
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1001 // iteration (after taking the Heap_lock). |
|
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|
1002 result = _mutator_alloc_region.attempt_allocation(word_size, |
|
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1003 false /* bot_updates */); |
|
5963
64bf7c8270cb
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4912
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1004 if (result != NULL) { |
|
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1005 return result; |
|
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|
1006 } |
|
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|
1007 |
|
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|
1008 // Give a warning if we seem to be looping forever. |
|
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1009 if ((QueuedAllocationWarningCount > 0) && |
|
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1010 (try_count % QueuedAllocationWarningCount == 0)) { |
|
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1011 warning("G1CollectedHeap::attempt_allocation_slow() " |
|
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1012 "retries %d times", try_count); |
|
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1013 } |
|
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1014 } |
|
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|
1015 |
|
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|
1016 ShouldNotReachHere(); |
|
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|
1017 return NULL; |
|
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|
1018 } |
|
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|
1019 |
|
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|
1020 HeapWord* G1CollectedHeap::attempt_allocation_humongous(size_t word_size, |
|
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1021 unsigned int * gc_count_before_ret) { |
|
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1022 // The structure of this method has a lot of similarities to |
|
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|
1023 // attempt_allocation_slow(). The reason these two were not merged |
|
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1024 // into a single one is that such a method would require several "if |
|
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1025 // allocation is not humongous do this, otherwise do that" |
|
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|
1026 // conditional paths which would obscure its flow. In fact, an early |
|
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|
1027 // version of this code did use a unified method which was harder to |
|
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|
1028 // follow and, as a result, it had subtle bugs that were hard to |
|
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|
1029 // track down. So keeping these two methods separate allows each to |
|
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|
1030 // be more readable. It will be good to keep these two in sync as |
|
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|
1031 // much as possible. |
|
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|
1032 |
|
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|
1033 assert_heap_not_locked_and_not_at_safepoint(); |
|
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|
1034 assert(isHumongous(word_size), "attempt_allocation_humongous() " |
|
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|
1035 "should only be called for humongous allocations"); |
|
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|
1036 |
|
4834
6a78aa6ac1ff
7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
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|
1037 // Humongous objects can exhaust the heap quickly, so we should check if we |
|
6a78aa6ac1ff
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|
1038 // need to start a marking cycle at each humongous object allocation. We do |
|
6a78aa6ac1ff
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|
1039 // the check before we do the actual allocation. The reason for doing it |
|
6a78aa6ac1ff
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|
1040 // before the allocation is that we avoid having to keep track of the newly |
|
6a78aa6ac1ff
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|
1041 // allocated memory while we do a GC. |
|
4910
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|
1042 if (g1_policy()->need_to_start_conc_mark("concurrent humongous allocation", |
|
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|
1043 word_size)) { |
|
4834
6a78aa6ac1ff
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|
1044 collect(GCCause::_g1_humongous_allocation); |
|
6a78aa6ac1ff
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|
1045 } |
|
6a78aa6ac1ff
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|
1046 |
|
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|
1047 // We will loop until a) we manage to successfully perform the |
|
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|
1048 // allocation or b) we successfully schedule a collection which |
|
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|
1049 // fails to perform the allocation. b) is the only case when we'll |
|
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|
1050 // return NULL. |
|
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|
1051 HeapWord* result = NULL; |
|
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|
1052 for (int try_count = 1; /* we'll return */; try_count += 1) { |
|
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|
1053 bool should_try_gc; |
|
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|
1054 unsigned int gc_count_before; |
|
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|
1055 |
|
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|
1056 { |
|
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|
1057 MutexLockerEx x(Heap_lock); |
|
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|
1058 |
|
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|
1059 // Given that humongous objects are not allocated in young |
|
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|
1060 // regions, we'll first try to do the allocation without doing a |
|
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|
1061 // collection hoping that there's enough space in the heap. |
|
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|
1062 result = humongous_obj_allocate(word_size); |
|
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diff
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|
1063 if (result != NULL) { |
|
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diff
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|
1064 return result; |
|
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|
1065 } |
|
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|
1066 |
|
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|
1067 if (GC_locker::is_active_and_needs_gc()) { |
|
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|
1068 should_try_gc = false; |
|
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|
1069 } else { |
|
6106
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|
1070 // The GCLocker may not be active but the GCLocker initiated |
|
1d478c993020
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|
1071 // GC may not yet have been performed (GCLocker::needs_gc() |
|
1d478c993020
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|
1072 // returns true). In this case we do not try this GC and |
|
1d478c993020
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|
1073 // wait until the GCLocker initiated GC is performed, and |
|
1d478c993020
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|
1074 // then retry the allocation. |
|
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|
1075 if (GC_locker::needs_gc()) { |
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1076 should_try_gc = false; |
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1077 } else { |
|
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1078 // Read the GC count while still holding the Heap_lock. |
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1079 gc_count_before = total_collections(); |
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1080 should_try_gc = true; |
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1081 } |
|
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1082 } |
|
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1083 } |
|
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1084 |
|
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1085 if (should_try_gc) { |
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1086 // If we failed to allocate the humongous object, we should try to |
|
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1087 // do a collection pause (if we're allowed) in case it reclaims |
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1088 // enough space for the allocation to succeed after the pause. |
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1089 |
|
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1090 bool succeeded; |
|
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1091 result = do_collection_pause(word_size, gc_count_before, &succeeded); |
|
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1092 if (result != NULL) { |
|
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1093 assert(succeeded, "only way to get back a non-NULL result"); |
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1094 return result; |
|
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1095 } |
|
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1096 |
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1097 if (succeeded) { |
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1098 // If we get here we successfully scheduled a collection which |
|
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1099 // failed to allocate. No point in trying to allocate |
|
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1100 // further. We'll just return NULL. |
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1101 MutexLockerEx x(Heap_lock); |
|
4910
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1102 *gc_count_before_ret = total_collections(); |
|
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1103 return NULL; |
|
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1104 } |
|
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1105 } else { |
|
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1106 // The GCLocker is either active or the GCLocker initiated |
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1107 // GC has not yet been performed. Stall until it is and |
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1108 // then retry the allocation. |
|
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1109 GC_locker::stall_until_clear(); |
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1110 } |
|
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1111 |
|
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1112 // We can reach here if we were unsuccessul in scheduling a |
|
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1113 // collection (because another thread beat us to it) or if we were |
|
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1114 // stalled due to the GC locker. In either can we should retry the |
|
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1115 // allocation attempt in case another thread successfully |
|
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1116 // performed a collection and reclaimed enough space. Give a |
|
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1117 // warning if we seem to be looping forever. |
|
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1118 |
|
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1119 if ((QueuedAllocationWarningCount > 0) && |
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1120 (try_count % QueuedAllocationWarningCount == 0)) { |
|
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1121 warning("G1CollectedHeap::attempt_allocation_humongous() " |
|
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1122 "retries %d times", try_count); |
|
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1123 } |
|
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1124 } |
|
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1125 |
|
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|
1126 ShouldNotReachHere(); |
|
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1127 return NULL; |
|
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|
1128 } |
|
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1129 |
|
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1130 HeapWord* G1CollectedHeap::attempt_allocation_at_safepoint(size_t word_size, |
|
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1131 bool expect_null_mutator_alloc_region) { |
| 2152 | 1132 assert_at_safepoint(true /* should_be_vm_thread */); |
|
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1133 assert(_mutator_alloc_region.get() == NULL || |
|
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1134 !expect_null_mutator_alloc_region, |
|
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1135 "the current alloc region was unexpectedly found to be non-NULL"); |
|
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1136 |
|
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1137 if (!isHumongous(word_size)) { |
|
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1138 return _mutator_alloc_region.attempt_allocation_locked(word_size, |
|
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1139 false /* bot_updates */); |
|
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1140 } else { |
|
4829
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|
1141 HeapWord* result = humongous_obj_allocate(word_size); |
|
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1142 if (result != NULL && g1_policy()->need_to_start_conc_mark("STW humongous allocation")) { |
|
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|
1143 g1_policy()->set_initiate_conc_mark_if_possible(); |
|
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|
1144 } |
|
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|
1145 return result; |
|
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|
1146 } |
|
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|
1147 |
|
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|
1148 ShouldNotReachHere(); |
| 342 | 1149 } |
| 1150 | |
| 1151 class PostMCRemSetClearClosure: public HeapRegionClosure { | |
|
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1152 G1CollectedHeap* _g1h; |
| 342 | 1153 ModRefBarrierSet* _mr_bs; |
| 1154 public: | |
|
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1155 PostMCRemSetClearClosure(G1CollectedHeap* g1h, ModRefBarrierSet* mr_bs) : |
|
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1156 _g1h(g1h), _mr_bs(mr_bs) { } |
| 342 | 1157 bool doHeapRegion(HeapRegion* r) { |
|
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1158 if (r->continuesHumongous()) { |
| 342 | 1159 return false; |
|
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1160 } |
|
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|
1161 _g1h->reset_gc_time_stamps(r); |
| 342 | 1162 HeapRegionRemSet* hrrs = r->rem_set(); |
| 1163 if (hrrs != NULL) hrrs->clear(); | |
| 1164 // You might think here that we could clear just the cards | |
| 1165 // corresponding to the used region. But no: if we leave a dirty card | |
| 1166 // in a region we might allocate into, then it would prevent that card | |
| 1167 // from being enqueued, and cause it to be missed. | |
| 1168 // Re: the performance cost: we shouldn't be doing full GC anyway! | |
| 1169 _mr_bs->clear(MemRegion(r->bottom(), r->end())); | |
| 1170 return false; | |
| 1171 } | |
| 1172 }; | |
| 1173 | |
|
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1174 void G1CollectedHeap::clear_rsets_post_compaction() { |
|
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1175 PostMCRemSetClearClosure rs_clear(this, mr_bs()); |
|
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1176 heap_region_iterate(&rs_clear); |
|
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1177 } |
| 342 | 1178 |
|
626
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1179 class RebuildRSOutOfRegionClosure: public HeapRegionClosure { |
|
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1180 G1CollectedHeap* _g1h; |
|
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1181 UpdateRSOopClosure _cl; |
|
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|
1182 int _worker_i; |
|
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1183 public: |
|
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|
1184 RebuildRSOutOfRegionClosure(G1CollectedHeap* g1, int worker_i = 0) : |
| 1861 | 1185 _cl(g1->g1_rem_set(), worker_i), |
|
626
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1186 _worker_i(worker_i), |
|
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|
1187 _g1h(g1) |
|
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|
1188 { } |
|
1960
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|
1189 |
|
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1190 bool doHeapRegion(HeapRegion* r) { |
|
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1191 if (!r->continuesHumongous()) { |
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1192 _cl.set_from(r); |
|
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1193 r->oop_iterate(&_cl); |
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1194 } |
|
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|
1195 return false; |
|
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|
1196 } |
|
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|
1197 }; |
|
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1198 |
|
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1199 class ParRebuildRSTask: public AbstractGangTask { |
|
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1200 G1CollectedHeap* _g1; |
|
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1201 public: |
|
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|
1202 ParRebuildRSTask(G1CollectedHeap* g1) |
|
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1203 : AbstractGangTask("ParRebuildRSTask"), |
|
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1204 _g1(g1) |
|
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1205 { } |
|
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1206 |
|
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|
1207 void work(uint worker_id) { |
|
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|
1208 RebuildRSOutOfRegionClosure rebuild_rs(_g1, worker_id); |
|
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|
1209 _g1->heap_region_par_iterate_chunked(&rebuild_rs, worker_id, |
|
4095
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1210 _g1->workers()->active_workers(), |
|
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1211 HeapRegion::RebuildRSClaimValue); |
|
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1212 } |
|
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1213 }; |
|
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1214 |
|
3778
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parents:
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|
1215 class PostCompactionPrinterClosure: public HeapRegionClosure { |
|
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7049999: G1: Make the G1PrintHeapRegions output consistent and complete
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|
1216 private: |
|
5f6f2615433a
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|
1217 G1HRPrinter* _hr_printer; |
|
5f6f2615433a
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|
1218 public: |
|
5f6f2615433a
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|
1219 bool doHeapRegion(HeapRegion* hr) { |
|
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|
1220 assert(!hr->is_young(), "not expecting to find young regions"); |
|
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|
1221 // We only generate output for non-empty regions. |
|
5f6f2615433a
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|
1222 if (!hr->is_empty()) { |
|
5f6f2615433a
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|
1223 if (!hr->isHumongous()) { |
|
5f6f2615433a
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diff
changeset
|
1224 _hr_printer->post_compaction(hr, G1HRPrinter::Old); |
|
5f6f2615433a
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parents:
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|
1225 } else if (hr->startsHumongous()) { |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1226 if (hr->region_num() == 1) { |
|
3778
5f6f2615433a
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parents:
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|
1227 // single humongous region |
|
5f6f2615433a
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parents:
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|
1228 _hr_printer->post_compaction(hr, G1HRPrinter::SingleHumongous); |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
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parents:
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|
1229 } else { |
|
5f6f2615433a
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|
1230 _hr_printer->post_compaction(hr, G1HRPrinter::StartsHumongous); |
|
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parents:
3777
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|
1231 } |
|
5f6f2615433a
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parents:
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diff
changeset
|
1232 } else { |
|
5f6f2615433a
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parents:
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changeset
|
1233 assert(hr->continuesHumongous(), "only way to get here"); |
|
5f6f2615433a
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|
1234 _hr_printer->post_compaction(hr, G1HRPrinter::ContinuesHumongous); |
|
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parents:
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changeset
|
1235 } |
|
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parents:
3777
diff
changeset
|
1236 } |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
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parents:
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diff
changeset
|
1237 return false; |
|
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parents:
3777
diff
changeset
|
1238 } |
|
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parents:
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changeset
|
1239 |
|
5f6f2615433a
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parents:
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changeset
|
1240 PostCompactionPrinterClosure(G1HRPrinter* hr_printer) |
|
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|
1241 : _hr_printer(hr_printer) { } |
|
5f6f2615433a
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|
1242 }; |
|
5f6f2615433a
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diff
changeset
|
1243 |
|
6254
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7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
diff
changeset
|
1244 void G1CollectedHeap::print_hrs_post_compaction() { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
diff
changeset
|
1245 PostCompactionPrinterClosure cl(hr_printer()); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
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diff
changeset
|
1246 heap_region_iterate(&cl); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1247 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1248 |
| 1973 | 1249 bool G1CollectedHeap::do_collection(bool explicit_gc, |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1250 bool clear_all_soft_refs, |
| 342 | 1251 size_t word_size) { |
| 2152 | 1252 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1253 | |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
1254 if (GC_locker::check_active_before_gc()) { |
| 1973 | 1255 return false; |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
1256 } |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
1257 |
|
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2039
diff
changeset
|
1258 SvcGCMarker sgcm(SvcGCMarker::FULL); |
| 342 | 1259 ResourceMark rm; |
| 1260 | |
|
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4787
diff
changeset
|
1261 print_heap_before_gc(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
1262 |
| 4072 | 1263 HRSPhaseSetter x(HRSPhaseFullGC); |
| 2152 | 1264 verify_region_sets_optional(); |
| 342 | 1265 |
|
1387
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1360
diff
changeset
|
1266 const bool do_clear_all_soft_refs = clear_all_soft_refs || |
|
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1360
diff
changeset
|
1267 collector_policy()->should_clear_all_soft_refs(); |
|
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1360
diff
changeset
|
1268 |
|
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1360
diff
changeset
|
1269 ClearedAllSoftRefs casr(do_clear_all_soft_refs, collector_policy()); |
|
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1360
diff
changeset
|
1270 |
| 342 | 1271 { |
| 1272 IsGCActiveMark x; | |
| 1273 | |
| 1274 // Timing | |
| 6030 | 1275 assert(gc_cause() != GCCause::_java_lang_system_gc || explicit_gc, "invariant"); |
|
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
1276 gclog_or_tty->date_stamp(G1Log::fine() && PrintGCDateStamps); |
|
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
1277 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
| 6030 | 1278 |
|
6064
9d679effd28c
7166894: Add gc cause to GC logging for all collectors
brutisso
parents:
6059
diff
changeset
|
1279 TraceTime t(GCCauseString("Full GC", gc_cause()), G1Log::fine(), true, gclog_or_tty); |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
1280 TraceCollectorStats tcs(g1mm()->full_collection_counters()); |
|
3356
78542e2b5e35
7036199: Adding a notification to the implementation of GarbageCollectorMXBeans
fparain
parents:
3323
diff
changeset
|
1281 TraceMemoryManagerStats tms(true /* fullGC */, gc_cause()); |
|
1089
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
tonyp
parents:
1088
diff
changeset
|
1282 |
| 342 | 1283 double start = os::elapsedTime(); |
| 1284 g1_policy()->record_full_collection_start(); | |
| 1285 | |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1286 // Note: When we have a more flexible GC logging framework that |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1287 // allows us to add optional attributes to a GC log record we |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
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parents:
4836
diff
changeset
|
1288 // could consider timing and reporting how long we wait in the |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
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diff
changeset
|
1289 // following two methods. |
| 2152 | 1290 wait_while_free_regions_coming(); |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1291 // If we start the compaction before the CM threads finish |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1292 // scanning the root regions we might trip them over as we'll |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1293 // be moving objects / updating references. So let's wait until |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1294 // they are done. By telling them to abort, they should complete |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1295 // early. |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1296 _cm->root_regions()->abort(); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1297 _cm->root_regions()->wait_until_scan_finished(); |
| 2361 | 1298 append_secondary_free_list_if_not_empty_with_lock(); |
| 2152 | 1299 |
| 342 | 1300 gc_prologue(true); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
1301 increment_total_collections(true /* full gc */); |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
1302 increment_old_marking_cycles_started(); |
| 342 | 1303 |
| 1304 size_t g1h_prev_used = used(); | |
| 1305 assert(used() == recalculate_used(), "Should be equal"); | |
| 1306 | |
| 1307 if (VerifyBeforeGC && total_collections() >= VerifyGCStartAt) { | |
| 1308 HandleMark hm; // Discard invalid handles created during verification | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1309 gclog_or_tty->print(" VerifyBeforeGC:"); |
| 342 | 1310 prepare_for_verify(); |
| 6008 | 1311 Universe::verify(/* silent */ false, |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
1312 /* option */ VerifyOption_G1UsePrevMarking); |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
1313 |
| 342 | 1314 } |
|
3869
7f776886a215
6810861: G1: support -XX:+{PrintClassHistogram,HeapDump}{Before,After}FullGC
ysr
parents:
3867
diff
changeset
|
1315 pre_full_gc_dump(); |
| 342 | 1316 |
| 1317 COMPILER2_PRESENT(DerivedPointerTable::clear()); | |
| 1318 | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1319 // Disable discovery and empty the discovered lists |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1320 // for the CM ref processor. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1321 ref_processor_cm()->disable_discovery(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1322 ref_processor_cm()->abandon_partial_discovery(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1323 ref_processor_cm()->verify_no_references_recorded(); |
| 342 | 1324 |
| 1325 // Abandon current iterations of concurrent marking and concurrent | |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1326 // refinement, if any are in progress. We have to do this before |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1327 // wait_until_scan_finished() below. |
| 342 | 1328 concurrent_mark()->abort(); |
| 1329 | |
| 1330 // Make sure we'll choose a new allocation region afterwards. | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1331 release_mutator_alloc_region(); |
| 636 | 1332 abandon_gc_alloc_regions(); |
| 1861 | 1333 g1_rem_set()->cleanupHRRS(); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1334 |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1335 // We should call this after we retire any currently active alloc |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1336 // regions so that all the ALLOC / RETIRE events are generated |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
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parents:
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diff
changeset
|
1337 // before the start GC event. |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
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parents:
3777
diff
changeset
|
1338 _hr_printer.start_gc(true /* full */, (size_t) total_collections()); |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1339 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1340 // We may have added regions to the current incremental collection |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1341 // set between the last GC or pause and now. We need to clear the |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1342 // incremental collection set and then start rebuilding it afresh |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1343 // after this full GC. |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1344 abandon_collection_set(g1_policy()->inc_cset_head()); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1345 g1_policy()->clear_incremental_cset(); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1346 g1_policy()->stop_incremental_cset_building(); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1347 |
| 4072 | 1348 tear_down_region_sets(false /* free_list_only */); |
| 4710 | 1349 g1_policy()->set_gcs_are_young(true); |
| 342 | 1350 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1351 // See the comments in g1CollectedHeap.hpp and |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1352 // G1CollectedHeap::ref_processing_init() about |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
1353 // how reference processing currently works in G1. |
|
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
1354 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1355 // Temporarily make discovery by the STW ref processor single threaded (non-MT). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1356 ReferenceProcessorMTDiscoveryMutator stw_rp_disc_ser(ref_processor_stw(), false); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1357 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1358 // Temporarily clear the STW ref processor's _is_alive_non_header field. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1359 ReferenceProcessorIsAliveMutator stw_rp_is_alive_null(ref_processor_stw(), NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1360 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1361 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, true /*verify_no_refs*/); |
|
4dfb2df418f2
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|
1362 ref_processor_stw()->setup_policy(do_clear_all_soft_refs); |
|
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|
1363 |
| 342 | 1364 // Do collection work |
| 1365 { | |
| 1366 HandleMark hm; // Discard invalid handles created during gc | |
|
3979
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|
1367 G1MarkSweep::invoke_at_safepoint(ref_processor_stw(), do_clear_all_soft_refs); |
| 342 | 1368 } |
|
3979
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|
1369 |
| 2152 | 1370 assert(free_regions() == 0, "we should not have added any free regions"); |
| 4072 | 1371 rebuild_region_sets(false /* free_list_only */); |
| 342 | 1372 |
|
3979
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|
1373 // Enqueue any discovered reference objects that have |
|
4dfb2df418f2
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|
1374 // not been removed from the discovered lists. |
|
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|
1375 ref_processor_stw()->enqueue_discovered_references(); |
| 342 | 1376 |
| 1377 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); | |
| 1378 | |
|
1089
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
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1088
diff
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|
1379 MemoryService::track_memory_usage(); |
|
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
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|
1380 |
| 342 | 1381 if (VerifyAfterGC && total_collections() >= VerifyGCStartAt) { |
| 1382 HandleMark hm; // Discard invalid handles created during verification | |
| 1383 gclog_or_tty->print(" VerifyAfterGC:"); | |
|
637
25e146966e7c
6817419: G1: Enable extensive verification for humongous regions
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parents:
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diff
changeset
|
1384 prepare_for_verify(); |
| 6008 | 1385 Universe::verify(/* silent */ false, |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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parents:
3766
diff
changeset
|
1386 /* option */ VerifyOption_G1UsePrevMarking); |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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|
1387 |
| 342 | 1388 } |
|
3979
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|
1389 |
|
4dfb2df418f2
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|
1390 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
|
4dfb2df418f2
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|
1391 ref_processor_stw()->verify_no_references_recorded(); |
|
4dfb2df418f2
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|
1392 |
|
4dfb2df418f2
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changeset
|
1393 // Note: since we've just done a full GC, concurrent |
|
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|
1394 // marking is no longer active. Therefore we need not |
|
4dfb2df418f2
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changeset
|
1395 // re-enable reference discovery for the CM ref processor. |
|
4dfb2df418f2
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changeset
|
1396 // That will be done at the start of the next marking cycle. |
|
4dfb2df418f2
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parents:
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|
1397 assert(!ref_processor_cm()->discovery_enabled(), "Postcondition"); |
|
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parents:
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changeset
|
1398 ref_processor_cm()->verify_no_references_recorded(); |
| 342 | 1399 |
| 1400 reset_gc_time_stamp(); | |
| 1401 // Since everything potentially moved, we will clear all remembered | |
|
626
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
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diff
changeset
|
1402 // sets, and clear all cards. Later we will rebuild remebered |
|
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
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diff
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|
1403 // sets. We will also reset the GC time stamps of the regions. |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1404 clear_rsets_post_compaction(); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
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diff
changeset
|
1405 check_gc_time_stamps(); |
| 342 | 1406 |
| 1407 // Resize the heap if necessary. | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1408 resize_if_necessary_after_full_collection(explicit_gc ? 0 : word_size); |
| 342 | 1409 |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1410 if (_hr_printer.is_active()) { |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1411 // We should do this after we potentially resize the heap so |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1412 // that all the COMMIT / UNCOMMIT events are generated before |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1413 // the end GC event. |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
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parents:
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diff
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|
1414 |
|
6254
a2f7274eb6ef
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parents:
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diff
changeset
|
1415 print_hrs_post_compaction(); |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1416 _hr_printer.end_gc(true /* full */, (size_t) total_collections()); |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
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parents:
3777
diff
changeset
|
1417 } |
|
5f6f2615433a
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parents:
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diff
changeset
|
1418 |
| 342 | 1419 if (_cg1r->use_cache()) { |
| 1420 _cg1r->clear_and_record_card_counts(); | |
| 1421 _cg1r->clear_hot_cache(); | |
| 1422 } | |
| 1423 | |
|
626
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
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diff
changeset
|
1424 // Rebuild remembered sets of all regions. |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
1425 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
1426 uint n_workers = |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1427 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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parents:
4090
diff
changeset
|
1428 workers()->active_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1429 Threads::number_of_non_daemon_threads()); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1430 assert(UseDynamicNumberOfGCThreads || |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1431 n_workers == workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1432 "If not dynamic should be using all the workers"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1433 workers()->set_active_workers(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1434 // Set parallel threads in the heap (_n_par_threads) only |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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parents:
4090
diff
changeset
|
1435 // before a parallel phase and always reset it to 0 after |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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parents:
4090
diff
changeset
|
1436 // the phase so that the number of parallel threads does |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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parents:
4090
diff
changeset
|
1437 // no get carried forward to a serial phase where there |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1438 // may be code that is "possibly_parallel". |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1439 set_par_threads(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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parents:
4090
diff
changeset
|
1440 |
|
626
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
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parents:
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diff
changeset
|
1441 ParRebuildRSTask rebuild_rs_task(this); |
|
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
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changeset
|
1442 assert(check_heap_region_claim_values( |
|
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
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diff
changeset
|
1443 HeapRegion::InitialClaimValue), "sanity check"); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1444 assert(UseDynamicNumberOfGCThreads || |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1445 workers()->active_workers() == workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1446 "Unless dynamic should use total workers"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1447 // Use the most recent number of active workers |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1448 assert(workers()->active_workers() > 0, |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1449 "Active workers not properly set"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1450 set_par_threads(workers()->active_workers()); |
|
626
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1451 workers()->run_task(&rebuild_rs_task); |
|
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1452 set_par_threads(0); |
|
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1453 assert(check_heap_region_claim_values( |
|
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1454 HeapRegion::RebuildRSClaimValue), "sanity check"); |
|
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1455 reset_heap_region_claim_values(); |
|
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1456 } else { |
|
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1457 RebuildRSOutOfRegionClosure rebuild_rs(this); |
|
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
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parents:
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diff
changeset
|
1458 heap_region_iterate(&rebuild_rs); |
|
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1459 } |
|
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1460 |
|
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
1461 if (G1Log::fine()) { |
| 342 | 1462 print_size_transition(gclog_or_tty, g1h_prev_used, used(), capacity()); |
| 1463 } | |
| 1464 | |
| 1465 if (true) { // FIXME | |
| 1466 // Ask the permanent generation to adjust size for full collections | |
| 1467 perm()->compute_new_size(); | |
| 1468 } | |
| 1469 | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1470 // Start a new incremental collection set for the next pause |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1471 assert(g1_policy()->collection_set() == NULL, "must be"); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1472 g1_policy()->start_incremental_cset_building(); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1473 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1474 // 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
|
1475 // regions to the incremental collection set for the next |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1476 // evacuation pause. |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1477 clear_cset_fast_test(); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1478 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1479 init_mutator_alloc_region(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1480 |
| 342 | 1481 double end = os::elapsedTime(); |
| 1482 g1_policy()->record_full_collection_end(); | |
| 1483 | |
|
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
1484 #ifdef TRACESPINNING |
|
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
1485 ParallelTaskTerminator::print_termination_counts(); |
|
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
1486 #endif |
|
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
1487 |
| 342 | 1488 gc_epilogue(true); |
| 1489 | |
| 794 | 1490 // Discard all rset updates |
| 1491 JavaThread::dirty_card_queue_set().abandon_logs(); | |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
1492 assert(!G1DeferredRSUpdate |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
1493 || (G1DeferredRSUpdate && (dirty_card_queue_set().completed_buffers_num() == 0)), "Should not be any"); |
|
6121
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
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parents:
6120
diff
changeset
|
1494 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
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6120
diff
changeset
|
1495 _young_list->reset_sampled_info(); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
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parents:
6120
diff
changeset
|
1496 // At this point there should be no regions in the |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
1497 // entire heap tagged as young. |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
1498 assert( check_young_list_empty(true /* check_heap */), |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
1499 "young list should be empty at this point"); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
1500 |
|
b9442ac22f59
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brutisso
parents:
6120
diff
changeset
|
1501 // Update the number of full collections that have been completed. |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
1502 increment_old_marking_cycles_completed(false /* concurrent */); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
1503 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
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parents:
6120
diff
changeset
|
1504 _hrs.verify_optional(); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
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parents:
6120
diff
changeset
|
1505 verify_region_sets_optional(); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
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parents:
6120
diff
changeset
|
1506 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
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parents:
6120
diff
changeset
|
1507 print_heap_after_gc(); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
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parents:
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diff
changeset
|
1508 |
|
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1509 // We must call G1MonitoringSupport::update_sizes() in the same scoping level |
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1510 // as an active TraceMemoryManagerStats object (i.e. before the destructor for the |
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1511 // TraceMemoryManagerStats is called) so that the G1 memory pools are updated |
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1512 // before any GC notifications are raised. |
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1513 g1mm()->update_sizes(); |
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1514 } |
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1515 |
|
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1516 post_full_gc_dump(); |
| 1973 | 1517 |
| 1518 return true; | |
| 342 | 1519 } |
| 1520 | |
| 1521 void G1CollectedHeap::do_full_collection(bool clear_all_soft_refs) { | |
| 1973 | 1522 // do_collection() will return whether it succeeded in performing |
| 1523 // the GC. Currently, there is no facility on the | |
| 1524 // do_full_collection() API to notify the caller than the collection | |
| 1525 // did not succeed (e.g., because it was locked out by the GC | |
| 1526 // locker). So, right now, we'll ignore the return value. | |
| 1527 bool dummy = do_collection(true, /* explicit_gc */ | |
| 1528 clear_all_soft_refs, | |
| 1529 0 /* word_size */); | |
| 342 | 1530 } |
| 1531 | |
| 1532 // This code is mostly copied from TenuredGeneration. | |
| 1533 void | |
| 1534 G1CollectedHeap:: | |
| 1535 resize_if_necessary_after_full_collection(size_t word_size) { | |
| 1536 assert(MinHeapFreeRatio <= MaxHeapFreeRatio, "sanity check"); | |
| 1537 | |
| 1538 // Include the current allocation, if any, and bytes that will be | |
| 1539 // pre-allocated to support collections, as "used". | |
| 1540 const size_t used_after_gc = used(); | |
| 1541 const size_t capacity_after_gc = capacity(); | |
| 1542 const size_t free_after_gc = capacity_after_gc - used_after_gc; | |
| 1543 | |
|
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1544 // This is enforced in arguments.cpp. |
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1545 assert(MinHeapFreeRatio <= MaxHeapFreeRatio, |
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1546 "otherwise the code below doesn't make sense"); |
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1547 |
| 342 | 1548 // We don't have floating point command-line arguments |
|
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1549 const double minimum_free_percentage = (double) MinHeapFreeRatio / 100.0; |
| 342 | 1550 const double maximum_used_percentage = 1.0 - minimum_free_percentage; |
|
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1551 const double maximum_free_percentage = (double) MaxHeapFreeRatio / 100.0; |
| 342 | 1552 const double minimum_used_percentage = 1.0 - maximum_free_percentage; |
| 1553 | |
|
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1554 const size_t min_heap_size = collector_policy()->min_heap_byte_size(); |
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1555 const size_t max_heap_size = collector_policy()->max_heap_byte_size(); |
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1556 |
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1557 // We have to be careful here as these two calculations can overflow |
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1558 // 32-bit size_t's. |
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1559 double used_after_gc_d = (double) used_after_gc; |
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1560 double minimum_desired_capacity_d = used_after_gc_d / maximum_used_percentage; |
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1561 double maximum_desired_capacity_d = used_after_gc_d / minimum_used_percentage; |
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1562 |
|
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1563 // Let's make sure that they are both under the max heap size, which |
|
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1564 // by default will make them fit into a size_t. |
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1565 double desired_capacity_upper_bound = (double) max_heap_size; |
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1566 minimum_desired_capacity_d = MIN2(minimum_desired_capacity_d, |
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1567 desired_capacity_upper_bound); |
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1568 maximum_desired_capacity_d = MIN2(maximum_desired_capacity_d, |
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1569 desired_capacity_upper_bound); |
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1570 |
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1571 // We can now safely turn them into size_t's. |
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1572 size_t minimum_desired_capacity = (size_t) minimum_desired_capacity_d; |
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1573 size_t maximum_desired_capacity = (size_t) maximum_desired_capacity_d; |
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1574 |
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1575 // This assert only makes sense here, before we adjust them |
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1576 // with respect to the min and max heap size. |
|
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1577 assert(minimum_desired_capacity <= maximum_desired_capacity, |
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1578 err_msg("minimum_desired_capacity = "SIZE_FORMAT", " |
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1579 "maximum_desired_capacity = "SIZE_FORMAT, |
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1580 minimum_desired_capacity, maximum_desired_capacity)); |
|
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1581 |
|
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1582 // Should not be greater than the heap max size. No need to adjust |
|
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1583 // it with respect to the heap min size as it's a lower bound (i.e., |
|
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1584 // we'll try to make the capacity larger than it, not smaller). |
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1585 minimum_desired_capacity = MIN2(minimum_desired_capacity, max_heap_size); |
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1586 // Should not be less than the heap min size. No need to adjust it |
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1587 // with respect to the heap max size as it's an upper bound (i.e., |
|
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1588 // we'll try to make the capacity smaller than it, not greater). |
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1589 maximum_desired_capacity = MAX2(maximum_desired_capacity, min_heap_size); |
| 342 | 1590 |
|
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1591 if (capacity_after_gc < minimum_desired_capacity) { |
| 342 | 1592 // Don't expand unless it's significant |
| 1593 size_t expand_bytes = minimum_desired_capacity - capacity_after_gc; | |
|
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1594 ergo_verbose4(ErgoHeapSizing, |
|
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1595 "attempt heap expansion", |
|
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1596 ergo_format_reason("capacity lower than " |
|
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1597 "min desired capacity after Full GC") |
|
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1598 ergo_format_byte("capacity") |
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1599 ergo_format_byte("occupancy") |
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1600 ergo_format_byte_perc("min desired capacity"), |
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1601 capacity_after_gc, used_after_gc, |
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1602 minimum_desired_capacity, (double) MinHeapFreeRatio); |
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1603 expand(expand_bytes); |
| 342 | 1604 |
| 1605 // No expansion, now see if we want to shrink | |
|
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|
1606 } else if (capacity_after_gc > maximum_desired_capacity) { |
| 342 | 1607 // Capacity too large, compute shrinking size |
| 1608 size_t shrink_bytes = capacity_after_gc - maximum_desired_capacity; | |
|
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1609 ergo_verbose4(ErgoHeapSizing, |
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1610 "attempt heap shrinking", |
|
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1611 ergo_format_reason("capacity higher than " |
|
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1612 "max desired capacity after Full GC") |
|
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|
1613 ergo_format_byte("capacity") |
|
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|
1614 ergo_format_byte("occupancy") |
|
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1615 ergo_format_byte_perc("max desired capacity"), |
|
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|
1616 capacity_after_gc, used_after_gc, |
|
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|
1617 maximum_desired_capacity, (double) MaxHeapFreeRatio); |
| 342 | 1618 shrink(shrink_bytes); |
| 1619 } | |
| 1620 } | |
| 1621 | |
| 1622 | |
| 1623 HeapWord* | |
| 1973 | 1624 G1CollectedHeap::satisfy_failed_allocation(size_t word_size, |
| 1625 bool* succeeded) { | |
| 2152 | 1626 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1973 | 1627 |
| 1628 *succeeded = true; | |
| 1629 // Let's attempt the allocation first. | |
|
2433
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|
1630 HeapWord* result = |
|
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|
1631 attempt_allocation_at_safepoint(word_size, |
|
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|
1632 false /* expect_null_mutator_alloc_region */); |
| 1973 | 1633 if (result != NULL) { |
| 1634 assert(*succeeded, "sanity"); | |
| 1635 return result; | |
| 1636 } | |
| 342 | 1637 |
| 1638 // In a G1 heap, we're supposed to keep allocation from failing by | |
| 1639 // incremental pauses. Therefore, at least for now, we'll favor | |
| 1640 // expansion over collection. (This might change in the future if we can | |
| 1641 // do something smarter than full collection to satisfy a failed alloc.) | |
| 1642 result = expand_and_allocate(word_size); | |
| 1643 if (result != NULL) { | |
| 1973 | 1644 assert(*succeeded, "sanity"); |
| 342 | 1645 return result; |
| 1646 } | |
| 1647 | |
| 1973 | 1648 // Expansion didn't work, we'll try to do a Full GC. |
| 1649 bool gc_succeeded = do_collection(false, /* explicit_gc */ | |
| 1650 false, /* clear_all_soft_refs */ | |
| 1651 word_size); | |
| 1652 if (!gc_succeeded) { | |
| 1653 *succeeded = false; | |
| 1654 return NULL; | |
| 1655 } | |
| 1656 | |
| 1657 // Retry the allocation | |
| 1658 result = attempt_allocation_at_safepoint(word_size, | |
|
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|
1659 true /* expect_null_mutator_alloc_region */); |
| 342 | 1660 if (result != NULL) { |
| 1973 | 1661 assert(*succeeded, "sanity"); |
| 342 | 1662 return result; |
| 1663 } | |
| 1664 | |
| 1973 | 1665 // Then, try a Full GC that will collect all soft references. |
| 1666 gc_succeeded = do_collection(false, /* explicit_gc */ | |
| 1667 true, /* clear_all_soft_refs */ | |
| 1668 word_size); | |
| 1669 if (!gc_succeeded) { | |
| 1670 *succeeded = false; | |
| 1671 return NULL; | |
| 1672 } | |
| 1673 | |
| 1674 // Retry the allocation once more | |
| 1675 result = attempt_allocation_at_safepoint(word_size, | |
|
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|
1676 true /* expect_null_mutator_alloc_region */); |
| 342 | 1677 if (result != NULL) { |
| 1973 | 1678 assert(*succeeded, "sanity"); |
| 342 | 1679 return result; |
| 1680 } | |
| 1681 | |
|
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1682 assert(!collector_policy()->should_clear_all_soft_refs(), |
| 1973 | 1683 "Flag should have been handled and cleared prior to this point"); |
|
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1684 |
| 342 | 1685 // What else? We might try synchronous finalization later. If the total |
| 1686 // space available is large enough for the allocation, then a more | |
| 1687 // complete compaction phase than we've tried so far might be | |
| 1688 // appropriate. | |
| 1973 | 1689 assert(*succeeded, "sanity"); |
| 342 | 1690 return NULL; |
| 1691 } | |
| 1692 | |
| 1693 // Attempting to expand the heap sufficiently | |
| 1694 // to support an allocation of the given "word_size". If | |
| 1695 // successful, perform the allocation and return the address of the | |
| 1696 // allocated block, or else "NULL". | |
| 1697 | |
| 1698 HeapWord* G1CollectedHeap::expand_and_allocate(size_t word_size) { | |
| 2152 | 1699 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1700 | |
| 1701 verify_region_sets_optional(); | |
| 1973 | 1702 |
|
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|
1703 size_t expand_bytes = MAX2(word_size * HeapWordSize, MinHeapDeltaBytes); |
|
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1704 ergo_verbose1(ErgoHeapSizing, |
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1705 "attempt heap expansion", |
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1706 ergo_format_reason("allocation request failed") |
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1707 ergo_format_byte("allocation request"), |
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1708 word_size * HeapWordSize); |
|
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1709 if (expand(expand_bytes)) { |
| 3766 | 1710 _hrs.verify_optional(); |
|
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1711 verify_region_sets_optional(); |
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1712 return attempt_allocation_at_safepoint(word_size, |
|
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1713 false /* expect_null_mutator_alloc_region */); |
|
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1714 } |
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1715 return NULL; |
| 342 | 1716 } |
| 1717 | |
| 3766 | 1718 void G1CollectedHeap::update_committed_space(HeapWord* old_end, |
| 1719 HeapWord* new_end) { | |
| 1720 assert(old_end != new_end, "don't call this otherwise"); | |
| 1721 assert((HeapWord*) _g1_storage.high() == new_end, "invariant"); | |
| 1722 | |
| 1723 // Update the committed mem region. | |
| 1724 _g1_committed.set_end(new_end); | |
| 1725 // Tell the card table about the update. | |
| 1726 Universe::heap()->barrier_set()->resize_covered_region(_g1_committed); | |
| 1727 // Tell the BOT about the update. | |
| 1728 _bot_shared->resize(_g1_committed.word_size()); | |
| 1729 } | |
| 1730 | |
|
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1731 bool G1CollectedHeap::expand(size_t expand_bytes) { |
| 342 | 1732 size_t old_mem_size = _g1_storage.committed_size(); |
|
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1733 size_t aligned_expand_bytes = ReservedSpace::page_align_size_up(expand_bytes); |
| 342 | 1734 aligned_expand_bytes = align_size_up(aligned_expand_bytes, |
| 1735 HeapRegion::GrainBytes); | |
|
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1736 ergo_verbose2(ErgoHeapSizing, |
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1737 "expand the heap", |
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1738 ergo_format_byte("requested expansion amount") |
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1739 ergo_format_byte("attempted expansion amount"), |
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1740 expand_bytes, aligned_expand_bytes); |
|
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1741 |
| 3766 | 1742 // First commit the memory. |
| 1743 HeapWord* old_end = (HeapWord*) _g1_storage.high(); | |
|
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1744 bool successful = _g1_storage.expand_by(aligned_expand_bytes); |
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1745 if (successful) { |
| 3766 | 1746 // Then propagate this update to the necessary data structures. |
| 1747 HeapWord* new_end = (HeapWord*) _g1_storage.high(); | |
| 1748 update_committed_space(old_end, new_end); | |
| 1749 | |
| 1750 FreeRegionList expansion_list("Local Expansion List"); | |
| 1751 MemRegion mr = _hrs.expand_by(old_end, new_end, &expansion_list); | |
| 1752 assert(mr.start() == old_end, "post-condition"); | |
| 1753 // mr might be a smaller region than what was requested if | |
| 1754 // expand_by() was unable to allocate the HeapRegion instances | |
| 1755 assert(mr.end() <= new_end, "post-condition"); | |
| 1756 | |
| 1757 size_t actual_expand_bytes = mr.byte_size(); | |
| 1758 assert(actual_expand_bytes <= aligned_expand_bytes, "post-condition"); | |
| 1759 assert(actual_expand_bytes == expansion_list.total_capacity_bytes(), | |
| 1760 "post-condition"); | |
| 1761 if (actual_expand_bytes < aligned_expand_bytes) { | |
| 1762 // We could not expand _hrs to the desired size. In this case we | |
| 1763 // need to shrink the committed space accordingly. | |
| 1764 assert(mr.end() < new_end, "invariant"); | |
| 1765 | |
| 1766 size_t diff_bytes = aligned_expand_bytes - actual_expand_bytes; | |
| 1767 // First uncommit the memory. | |
| 1768 _g1_storage.shrink_by(diff_bytes); | |
| 1769 // Then propagate this update to the necessary data structures. | |
| 1770 update_committed_space(new_end, mr.end()); | |
|
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1771 } |
| 3766 | 1772 _free_list.add_as_tail(&expansion_list); |
|
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1773 |
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1774 if (_hr_printer.is_active()) { |
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1775 HeapWord* curr = mr.start(); |
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1776 while (curr < mr.end()) { |
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1777 HeapWord* curr_end = curr + HeapRegion::GrainWords; |
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1778 _hr_printer.commit(curr, curr_end); |
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1779 curr = curr_end; |
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1780 } |
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1781 assert(curr == mr.end(), "post-condition"); |
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1782 } |
|
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1783 g1_policy()->record_new_heap_size(n_regions()); |
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1784 } else { |
|
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1785 ergo_verbose0(ErgoHeapSizing, |
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1786 "did not expand the heap", |
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1787 ergo_format_reason("heap expansion operation failed")); |
|
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1788 // The expansion of the virtual storage space was unsuccessful. |
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1789 // Let's see if it was because we ran out of swap. |
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1790 if (G1ExitOnExpansionFailure && |
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1791 _g1_storage.uncommitted_size() >= aligned_expand_bytes) { |
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1792 // We had head room... |
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1793 vm_exit_out_of_memory(aligned_expand_bytes, "G1 heap expansion"); |
| 342 | 1794 } |
| 1795 } | |
|
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1796 return successful; |
| 342 | 1797 } |
| 1798 | |
| 3766 | 1799 void G1CollectedHeap::shrink_helper(size_t shrink_bytes) { |
| 342 | 1800 size_t old_mem_size = _g1_storage.committed_size(); |
| 1801 size_t aligned_shrink_bytes = | |
| 1802 ReservedSpace::page_align_size_down(shrink_bytes); | |
| 1803 aligned_shrink_bytes = align_size_down(aligned_shrink_bytes, | |
| 1804 HeapRegion::GrainBytes); | |
|
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1805 uint num_regions_deleted = 0; |
| 3766 | 1806 MemRegion mr = _hrs.shrink_by(aligned_shrink_bytes, &num_regions_deleted); |
| 1807 HeapWord* old_end = (HeapWord*) _g1_storage.high(); | |
| 1808 assert(mr.end() == old_end, "post-condition"); | |
|
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1809 |
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1810 ergo_verbose3(ErgoHeapSizing, |
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1811 "shrink the heap", |
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1812 ergo_format_byte("requested shrinking amount") |
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1813 ergo_format_byte("aligned shrinking amount") |
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1814 ergo_format_byte("attempted shrinking amount"), |
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1815 shrink_bytes, aligned_shrink_bytes, mr.byte_size()); |
| 3766 | 1816 if (mr.byte_size() > 0) { |
|
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1817 if (_hr_printer.is_active()) { |
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1818 HeapWord* curr = mr.end(); |
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1819 while (curr > mr.start()) { |
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1820 HeapWord* curr_end = curr; |
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1821 curr -= HeapRegion::GrainWords; |
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1822 _hr_printer.uncommit(curr, curr_end); |
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1823 } |
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1824 assert(curr == mr.start(), "post-condition"); |
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1825 } |
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1826 |
| 342 | 1827 _g1_storage.shrink_by(mr.byte_size()); |
| 3766 | 1828 HeapWord* new_end = (HeapWord*) _g1_storage.high(); |
| 1829 assert(mr.start() == new_end, "post-condition"); | |
| 1830 | |
| 1831 _expansion_regions += num_regions_deleted; | |
| 1832 update_committed_space(old_end, new_end); | |
| 1833 HeapRegionRemSet::shrink_heap(n_regions()); | |
|
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1834 g1_policy()->record_new_heap_size(n_regions()); |
|
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1835 } else { |
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1836 ergo_verbose0(ErgoHeapSizing, |
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1837 "did not shrink the heap", |
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1838 ergo_format_reason("heap shrinking operation failed")); |
| 342 | 1839 } |
| 1840 } | |
| 1841 | |
| 1842 void G1CollectedHeap::shrink(size_t shrink_bytes) { | |
| 2152 | 1843 verify_region_sets_optional(); |
| 1844 | |
|
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1845 // We should only reach here at the end of a Full GC which means we |
|
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1846 // should not not be holding to any GC alloc regions. The method |
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1847 // below will make sure of that and do any remaining clean up. |
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1848 abandon_gc_alloc_regions(); |
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1849 |
| 2152 | 1850 // Instead of tearing down / rebuilding the free lists here, we |
| 1851 // could instead use the remove_all_pending() method on free_list to | |
| 1852 // remove only the ones that we need to remove. | |
| 4072 | 1853 tear_down_region_sets(true /* free_list_only */); |
| 342 | 1854 shrink_helper(shrink_bytes); |
| 4072 | 1855 rebuild_region_sets(true /* free_list_only */); |
| 2152 | 1856 |
| 3766 | 1857 _hrs.verify_optional(); |
| 2152 | 1858 verify_region_sets_optional(); |
| 342 | 1859 } |
| 1860 | |
| 1861 // Public methods. | |
| 1862 | |
| 1863 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away | |
| 1864 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list | |
| 1865 #endif // _MSC_VER | |
| 1866 | |
| 1867 | |
| 1868 G1CollectedHeap::G1CollectedHeap(G1CollectorPolicy* policy_) : | |
| 1869 SharedHeap(policy_), | |
| 1870 _g1_policy(policy_), | |
| 1111 | 1871 _dirty_card_queue_set(false), |
| 1705 | 1872 _into_cset_dirty_card_queue_set(false), |
|
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1873 _is_alive_closure_cm(this), |
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1874 _is_alive_closure_stw(this), |
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1875 _ref_processor_cm(NULL), |
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1876 _ref_processor_stw(NULL), |
| 342 | 1877 _process_strong_tasks(new SubTasksDone(G1H_PS_NumElements)), |
| 1878 _bot_shared(NULL), | |
| 1879 _objs_with_preserved_marks(NULL), _preserved_marks_of_objs(NULL), | |
| 1880 _evac_failure_scan_stack(NULL) , | |
| 1881 _mark_in_progress(false), | |
| 2152 | 1882 _cg1r(NULL), _summary_bytes_used(0), |
|
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1883 _g1mm(NULL), |
| 342 | 1884 _refine_cte_cl(NULL), |
| 1885 _full_collection(false), | |
| 2152 | 1886 _free_list("Master Free List"), |
| 1887 _secondary_free_list("Secondary Free List"), | |
| 4072 | 1888 _old_set("Old Set"), |
| 2152 | 1889 _humongous_set("Master Humongous Set"), |
| 1890 _free_regions_coming(false), | |
| 342 | 1891 _young_list(new YoungList(this)), |
| 1892 _gc_time_stamp(0), | |
|
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1893 _retained_old_gc_alloc_region(NULL), |
|
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1894 _expand_heap_after_alloc_failure(true), |
| 526 | 1895 _surviving_young_words(NULL), |
|
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1896 _old_marking_cycles_started(0), |
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1897 _old_marking_cycles_completed(0), |
| 526 | 1898 _in_cset_fast_test(NULL), |
|
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1899 _in_cset_fast_test_base(NULL), |
|
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1900 _dirty_cards_region_list(NULL), |
|
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1901 _worker_cset_start_region(NULL), |
|
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|
1902 _worker_cset_start_region_time_stamp(NULL) { |
| 342 | 1903 _g1h = this; // To catch bugs. |
| 1904 if (_process_strong_tasks == NULL || !_process_strong_tasks->valid()) { | |
| 1905 vm_exit_during_initialization("Failed necessary allocation."); | |
| 1906 } | |
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1907 |
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1908 _humongous_object_threshold_in_words = HeapRegion::GrainWords / 2; |
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1909 |
| 342 | 1910 int n_queues = MAX2((int)ParallelGCThreads, 1); |
| 1911 _task_queues = new RefToScanQueueSet(n_queues); | |
| 1912 | |
| 1913 int n_rem_sets = HeapRegionRemSet::num_par_rem_sets(); | |
| 1914 assert(n_rem_sets > 0, "Invariant."); | |
| 1915 | |
| 1916 HeapRegionRemSetIterator** iter_arr = | |
| 6197 | 1917 NEW_C_HEAP_ARRAY(HeapRegionRemSetIterator*, n_queues, mtGC); |
| 342 | 1918 for (int i = 0; i < n_queues; i++) { |
| 1919 iter_arr[i] = new HeapRegionRemSetIterator(); | |
| 1920 } | |
| 1921 _rem_set_iterator = iter_arr; | |
| 1922 | |
| 6197 | 1923 _worker_cset_start_region = NEW_C_HEAP_ARRAY(HeapRegion*, n_queues, mtGC); |
| 1924 _worker_cset_start_region_time_stamp = NEW_C_HEAP_ARRAY(unsigned int, n_queues, mtGC); | |
|
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1925 |
| 342 | 1926 for (int i = 0; i < n_queues; i++) { |
| 1927 RefToScanQueue* q = new RefToScanQueue(); | |
| 1928 q->initialize(); | |
| 1929 _task_queues->register_queue(i, q); | |
| 1930 } | |
| 1931 | |
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1932 clear_cset_start_regions(); |
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1933 |
| 342 | 1934 guarantee(_task_queues != NULL, "task_queues allocation failure."); |
| 1935 } | |
| 1936 | |
| 1937 jint G1CollectedHeap::initialize() { | |
| 1166 | 1938 CollectedHeap::pre_initialize(); |
| 342 | 1939 os::enable_vtime(); |
| 1940 | |
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1941 G1Log::init(); |
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1942 |
| 342 | 1943 // Necessary to satisfy locking discipline assertions. |
| 1944 | |
| 1945 MutexLocker x(Heap_lock); | |
| 1946 | |
|
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1947 // We have to initialize the printer before committing the heap, as |
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1948 // it will be used then. |
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1949 _hr_printer.set_active(G1PrintHeapRegions); |
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1950 |
| 342 | 1951 // While there are no constraints in the GC code that HeapWordSize |
| 1952 // be any particular value, there are multiple other areas in the | |
| 1953 // system which believe this to be true (e.g. oop->object_size in some | |
| 1954 // cases incorrectly returns the size in wordSize units rather than | |
| 1955 // HeapWordSize). | |
| 1956 guarantee(HeapWordSize == wordSize, "HeapWordSize must equal wordSize"); | |
| 1957 | |
| 1958 size_t init_byte_size = collector_policy()->initial_heap_byte_size(); | |
| 1959 size_t max_byte_size = collector_policy()->max_heap_byte_size(); | |
| 1960 | |
| 1961 // Ensure that the sizes are properly aligned. | |
| 1962 Universe::check_alignment(init_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
| 1963 Universe::check_alignment(max_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
| 1964 | |
| 1965 _cg1r = new ConcurrentG1Refine(); | |
| 1966 | |
| 1967 // Reserve the maximum. | |
| 1968 PermanentGenerationSpec* pgs = collector_policy()->permanent_generation(); | |
| 1969 // Includes the perm-gen. | |
|
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1970 |
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1971 // When compressed oops are enabled, the preferred heap base |
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1972 // is calculated by subtracting the requested size from the |
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1973 // 32Gb boundary and using the result as the base address for |
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1974 // heap reservation. If the requested size is not aligned to |
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1975 // HeapRegion::GrainBytes (i.e. the alignment that is passed |
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1976 // into the ReservedHeapSpace constructor) then the actual |
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1977 // base of the reserved heap may end up differing from the |
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1978 // address that was requested (i.e. the preferred heap base). |
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1979 // If this happens then we could end up using a non-optimal |
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1980 // compressed oops mode. |
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1981 |
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1982 // Since max_byte_size is aligned to the size of a heap region (checked |
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1983 // above), we also need to align the perm gen size as it might not be. |
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1984 const size_t total_reserved = max_byte_size + |
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1985 align_size_up(pgs->max_size(), HeapRegion::GrainBytes); |
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1986 Universe::check_alignment(total_reserved, HeapRegion::GrainBytes, "g1 heap and perm"); |
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1987 |
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1988 char* addr = Universe::preferred_heap_base(total_reserved, Universe::UnscaledNarrowOop); |
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1989 |
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1990 ReservedHeapSpace heap_rs(total_reserved, HeapRegion::GrainBytes, |
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1991 UseLargePages, addr); |
|
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1992 |
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1993 if (UseCompressedOops) { |
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1994 if (addr != NULL && !heap_rs.is_reserved()) { |
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1995 // Failed to reserve at specified address - the requested memory |
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1996 // region is taken already, for example, by 'java' launcher. |
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1997 // Try again to reserver heap higher. |
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1998 addr = Universe::preferred_heap_base(total_reserved, Universe::ZeroBasedNarrowOop); |
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1999 |
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2000 ReservedHeapSpace heap_rs0(total_reserved, HeapRegion::GrainBytes, |
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2001 UseLargePages, addr); |
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2002 |
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2003 if (addr != NULL && !heap_rs0.is_reserved()) { |
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2004 // Failed to reserve at specified address again - give up. |
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2005 addr = Universe::preferred_heap_base(total_reserved, Universe::HeapBasedNarrowOop); |
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2006 assert(addr == NULL, ""); |
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2007 |
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2008 ReservedHeapSpace heap_rs1(total_reserved, HeapRegion::GrainBytes, |
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2009 UseLargePages, addr); |
|
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2010 heap_rs = heap_rs1; |
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2011 } else { |
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2012 heap_rs = heap_rs0; |
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2013 } |
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2014 } |
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2015 } |
| 342 | 2016 |
| 2017 if (!heap_rs.is_reserved()) { | |
| 2018 vm_exit_during_initialization("Could not reserve enough space for object heap"); | |
| 2019 return JNI_ENOMEM; | |
| 2020 } | |
| 2021 | |
| 2022 // It is important to do this in a way such that concurrent readers can't | |
| 2023 // temporarily think somethings in the heap. (I've actually seen this | |
| 2024 // happen in asserts: DLD.) | |
| 2025 _reserved.set_word_size(0); | |
| 2026 _reserved.set_start((HeapWord*)heap_rs.base()); | |
| 2027 _reserved.set_end((HeapWord*)(heap_rs.base() + heap_rs.size())); | |
| 2028 | |
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2029 _expansion_regions = (uint) (max_byte_size / HeapRegion::GrainBytes); |
| 342 | 2030 |
| 2031 // Create the gen rem set (and barrier set) for the entire reserved region. | |
| 2032 _rem_set = collector_policy()->create_rem_set(_reserved, 2); | |
| 2033 set_barrier_set(rem_set()->bs()); | |
| 2034 if (barrier_set()->is_a(BarrierSet::ModRef)) { | |
| 2035 _mr_bs = (ModRefBarrierSet*)_barrier_set; | |
| 2036 } else { | |
| 2037 vm_exit_during_initialization("G1 requires a mod ref bs."); | |
| 2038 return JNI_ENOMEM; | |
| 2039 } | |
| 2040 | |
| 2041 // Also create a G1 rem set. | |
| 1861 | 2042 if (mr_bs()->is_a(BarrierSet::CardTableModRef)) { |
| 2043 _g1_rem_set = new G1RemSet(this, (CardTableModRefBS*)mr_bs()); | |
| 342 | 2044 } else { |
| 1861 | 2045 vm_exit_during_initialization("G1 requires a cardtable mod ref bs."); |
| 2046 return JNI_ENOMEM; | |
| 342 | 2047 } |
| 2048 | |
| 2049 // Carve out the G1 part of the heap. | |
| 2050 | |
| 2051 ReservedSpace g1_rs = heap_rs.first_part(max_byte_size); | |
| 2052 _g1_reserved = MemRegion((HeapWord*)g1_rs.base(), | |
| 2053 g1_rs.size()/HeapWordSize); | |
| 2054 ReservedSpace perm_gen_rs = heap_rs.last_part(max_byte_size); | |
| 2055 | |
| 2056 _perm_gen = pgs->init(perm_gen_rs, pgs->init_size(), rem_set()); | |
| 2057 | |
| 2058 _g1_storage.initialize(g1_rs, 0); | |
| 2059 _g1_committed = MemRegion((HeapWord*)_g1_storage.low(), (size_t) 0); | |
| 3766 | 2060 _hrs.initialize((HeapWord*) _g1_reserved.start(), |
| 2061 (HeapWord*) _g1_reserved.end(), | |
| 2062 _expansion_regions); | |
| 342 | 2063 |
|
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2064 // 6843694 - ensure that the maximum region index can fit |
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2065 // in the remembered set structures. |
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2066 const uint max_region_idx = (1U << (sizeof(RegionIdx_t)*BitsPerByte-1)) - 1; |
|
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2067 guarantee((max_regions() - 1) <= max_region_idx, "too many regions"); |
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2068 |
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2069 size_t max_cards_per_region = ((size_t)1 << (sizeof(CardIdx_t)*BitsPerByte-1)) - 1; |
|
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2070 guarantee(HeapRegion::CardsPerRegion > 0, "make sure it's initialized"); |
|
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2071 guarantee(HeapRegion::CardsPerRegion < max_cards_per_region, |
|
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2072 "too many cards per region"); |
|
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2073 |
| 2152 | 2074 HeapRegionSet::set_unrealistically_long_length(max_regions() + 1); |
| 2075 | |
| 342 | 2076 _bot_shared = new G1BlockOffsetSharedArray(_reserved, |
| 2077 heap_word_size(init_byte_size)); | |
| 2078 | |
| 2079 _g1h = this; | |
| 2080 | |
|
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2081 _in_cset_fast_test_length = max_regions(); |
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2082 _in_cset_fast_test_base = |
| 6197 | 2083 NEW_C_HEAP_ARRAY(bool, (size_t) _in_cset_fast_test_length, mtGC); |
|
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2084 |
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2085 // We're biasing _in_cset_fast_test to avoid subtracting the |
|
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2086 // beginning of the heap every time we want to index; basically |
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2087 // it's the same with what we do with the card table. |
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2088 _in_cset_fast_test = _in_cset_fast_test_base - |
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2089 ((uintx) _g1_reserved.start() >> HeapRegion::LogOfHRGrainBytes); |
|
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2090 |
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2091 // Clear the _cset_fast_test bitmap in anticipation of adding |
|
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2092 // regions to the incremental collection set for the first |
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2093 // evacuation pause. |
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2094 clear_cset_fast_test(); |
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2095 |
| 342 | 2096 // Create the ConcurrentMark data structure and thread. |
| 2097 // (Must do this late, so that "max_regions" is defined.) | |
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|
2098 _cm = new ConcurrentMark(heap_rs, max_regions()); |
| 342 | 2099 _cmThread = _cm->cmThread(); |
| 2100 | |
| 2101 // Initialize the from_card cache structure of HeapRegionRemSet. | |
| 2102 HeapRegionRemSet::init_heap(max_regions()); | |
| 2103 | |
| 677 | 2104 // Now expand into the initial heap size. |
|
2188
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|
2105 if (!expand(init_byte_size)) { |
|
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|
2106 vm_exit_during_initialization("Failed to allocate initial heap."); |
|
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|
2107 return JNI_ENOMEM; |
|
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|
2108 } |
| 342 | 2109 |
| 2110 // Perform any initialization actions delegated to the policy. | |
| 2111 g1_policy()->init(); | |
| 2112 | |
| 2113 _refine_cte_cl = | |
| 2114 new RefineCardTableEntryClosure(ConcurrentG1RefineThread::sts(), | |
| 2115 g1_rem_set(), | |
| 2116 concurrent_g1_refine()); | |
| 2117 JavaThread::dirty_card_queue_set().set_closure(_refine_cte_cl); | |
| 2118 | |
| 2119 JavaThread::satb_mark_queue_set().initialize(SATB_Q_CBL_mon, | |
| 2120 SATB_Q_FL_lock, | |
| 1111 | 2121 G1SATBProcessCompletedThreshold, |
| 342 | 2122 Shared_SATB_Q_lock); |
| 794 | 2123 |
| 2124 JavaThread::dirty_card_queue_set().initialize(DirtyCardQ_CBL_mon, | |
| 2125 DirtyCardQ_FL_lock, | |
| 1111 | 2126 concurrent_g1_refine()->yellow_zone(), |
| 2127 concurrent_g1_refine()->red_zone(), | |
| 794 | 2128 Shared_DirtyCardQ_lock); |
| 2129 | |
|
616
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|
2130 if (G1DeferredRSUpdate) { |
|
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|
2131 dirty_card_queue_set().initialize(DirtyCardQ_CBL_mon, |
|
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|
2132 DirtyCardQ_FL_lock, |
| 1111 | 2133 -1, // never trigger processing |
| 2134 -1, // no limit on length | |
|
616
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|
2135 Shared_DirtyCardQ_lock, |
|
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|
2136 &JavaThread::dirty_card_queue_set()); |
|
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|
2137 } |
| 1705 | 2138 |
| 2139 // Initialize the card queue set used to hold cards containing | |
| 2140 // references into the collection set. | |
| 2141 _into_cset_dirty_card_queue_set.initialize(DirtyCardQ_CBL_mon, | |
| 2142 DirtyCardQ_FL_lock, | |
| 2143 -1, // never trigger processing | |
| 2144 -1, // no limit on length | |
| 2145 Shared_DirtyCardQ_lock, | |
| 2146 &JavaThread::dirty_card_queue_set()); | |
| 2147 | |
| 342 | 2148 // In case we're keeping closure specialization stats, initialize those |
| 2149 // counts and that mechanism. | |
| 2150 SpecializationStats::clear(); | |
| 2151 | |
| 2152 // Do later initialization work for concurrent refinement. | |
| 2153 _cg1r->init(); | |
| 2154 | |
|
2433
abdfc822206f
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|
2155 // Here we allocate the dummy full region that is required by the |
|
abdfc822206f
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|
2156 // G1AllocRegion class. If we don't pass an address in the reserved |
|
abdfc822206f
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|
2157 // space here, lots of asserts fire. |
| 3766 | 2158 |
| 2159 HeapRegion* dummy_region = new_heap_region(0 /* index of bottom region */, | |
| 2160 _g1_reserved.start()); | |
|
2433
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|
2161 // We'll re-use the same region whether the alloc region will |
|
abdfc822206f
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|
2162 // require BOT updates or not and, if it doesn't, then a non-young |
|
abdfc822206f
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|
2163 // region will complain that it cannot support allocations without |
|
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|
2164 // BOT updates. So we'll tag the dummy region as young to avoid that. |
|
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|
2165 dummy_region->set_young(); |
|
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|
2166 // Make sure it's full. |
|
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|
2167 dummy_region->set_top(dummy_region->end()); |
|
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|
2168 G1AllocRegion::setup(this, dummy_region); |
|
abdfc822206f
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|
2169 |
|
abdfc822206f
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|
2170 init_mutator_alloc_region(); |
|
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|
2171 |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
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|
2172 // Do create of the monitoring and management support so that |
|
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
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|
2173 // values in the heap have been properly initialized. |
|
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
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|
2174 _g1mm = new G1MonitoringSupport(this); |
|
3289
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|
2175 |
| 342 | 2176 return JNI_OK; |
| 2177 } | |
| 2178 | |
| 2179 void G1CollectedHeap::ref_processing_init() { | |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
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diff
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|
2180 // Reference processing in G1 currently works as follows: |
|
fd1d227ef1b9
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|
2181 // |
|
3979
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|
2182 // * There are two reference processor instances. One is |
|
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|
2183 // used to record and process discovered references |
|
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|
2184 // during concurrent marking; the other is used to |
|
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|
2185 // record and process references during STW pauses |
|
4dfb2df418f2
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|
2186 // (both full and incremental). |
|
4dfb2df418f2
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|
2187 // * Both ref processors need to 'span' the entire heap as |
|
4dfb2df418f2
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|
2188 // the regions in the collection set may be dotted around. |
|
4dfb2df418f2
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|
2189 // |
|
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|
2190 // * For the concurrent marking ref processor: |
|
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|
2191 // * Reference discovery is enabled at initial marking. |
|
4dfb2df418f2
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|
2192 // * Reference discovery is disabled and the discovered |
|
4dfb2df418f2
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|
2193 // references processed etc during remarking. |
|
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|
2194 // * Reference discovery is MT (see below). |
|
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|
2195 // * Reference discovery requires a barrier (see below). |
|
4dfb2df418f2
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|
2196 // * Reference processing may or may not be MT |
|
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|
2197 // (depending on the value of ParallelRefProcEnabled |
|
4dfb2df418f2
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parents:
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changeset
|
2198 // and ParallelGCThreads). |
|
4dfb2df418f2
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changeset
|
2199 // * A full GC disables reference discovery by the CM |
|
4dfb2df418f2
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changeset
|
2200 // ref processor and abandons any entries on it's |
|
4dfb2df418f2
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parents:
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diff
changeset
|
2201 // discovered lists. |
|
4dfb2df418f2
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diff
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|
2202 // |
|
4dfb2df418f2
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changeset
|
2203 // * For the STW processor: |
|
4dfb2df418f2
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|
2204 // * Non MT discovery is enabled at the start of a full GC. |
|
4dfb2df418f2
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|
2205 // * Processing and enqueueing during a full GC is non-MT. |
|
4dfb2df418f2
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changeset
|
2206 // * During a full GC, references are processed after marking. |
|
4dfb2df418f2
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parents:
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changeset
|
2207 // |
|
4dfb2df418f2
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changeset
|
2208 // * Discovery (may or may not be MT) is enabled at the start |
|
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3973
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changeset
|
2209 // of an incremental evacuation pause. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
2210 // * References are processed near the end of a STW evacuation pause. |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
2211 // * For both types of GC: |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
2212 // * Discovery is atomic - i.e. not concurrent. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
2213 // * Reference discovery will not need a barrier. |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
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diff
changeset
|
2214 |
| 342 | 2215 SharedHeap::ref_processing_init(); |
| 2216 MemRegion mr = reserved_region(); | |
|
3979
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|
2217 |
|
4dfb2df418f2
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changeset
|
2218 // Concurrent Mark ref processor |
|
4dfb2df418f2
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diff
changeset
|
2219 _ref_processor_cm = |
|
2369
92da084fefc9
6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads
ysr
parents:
2361
diff
changeset
|
2220 new ReferenceProcessor(mr, // span |
|
3979
4dfb2df418f2
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parents:
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diff
changeset
|
2221 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
|
4dfb2df418f2
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diff
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|
2222 // mt processing |
|
4dfb2df418f2
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diff
changeset
|
2223 (int) ParallelGCThreads, |
|
4dfb2df418f2
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diff
changeset
|
2224 // degree of mt processing |
|
4dfb2df418f2
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diff
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|
2225 (ParallelGCThreads > 1) || (ConcGCThreads > 1), |
|
4dfb2df418f2
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diff
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|
2226 // mt discovery |
|
4dfb2df418f2
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diff
changeset
|
2227 (int) MAX2(ParallelGCThreads, ConcGCThreads), |
|
4dfb2df418f2
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|
2228 // degree of mt discovery |
|
4dfb2df418f2
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diff
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|
2229 false, |
|
4dfb2df418f2
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diff
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|
2230 // Reference discovery is not atomic |
|
4dfb2df418f2
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diff
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|
2231 &_is_alive_closure_cm, |
|
4dfb2df418f2
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|
2232 // is alive closure |
|
4dfb2df418f2
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changeset
|
2233 // (for efficiency/performance) |
|
4dfb2df418f2
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|
2234 true); |
|
4dfb2df418f2
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changeset
|
2235 // Setting next fields of discovered |
|
4dfb2df418f2
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diff
changeset
|
2236 // lists requires a barrier. |
|
4dfb2df418f2
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|
2237 |
|
4dfb2df418f2
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diff
changeset
|
2238 // STW ref processor |
|
4dfb2df418f2
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diff
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|
2239 _ref_processor_stw = |
|
4dfb2df418f2
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diff
changeset
|
2240 new ReferenceProcessor(mr, // span |
|
4dfb2df418f2
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diff
changeset
|
2241 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
|
4dfb2df418f2
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|
2242 // mt processing |
|
4dfb2df418f2
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changeset
|
2243 MAX2((int)ParallelGCThreads, 1), |
|
4dfb2df418f2
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|
2244 // degree of mt processing |
|
4dfb2df418f2
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diff
changeset
|
2245 (ParallelGCThreads > 1), |
|
4dfb2df418f2
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diff
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|
2246 // mt discovery |
|
4dfb2df418f2
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|
2247 MAX2((int)ParallelGCThreads, 1), |
|
4dfb2df418f2
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|
2248 // degree of mt discovery |
|
4dfb2df418f2
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diff
changeset
|
2249 true, |
|
4dfb2df418f2
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diff
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|
2250 // Reference discovery is atomic |
|
4dfb2df418f2
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changeset
|
2251 &_is_alive_closure_stw, |
|
4dfb2df418f2
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|
2252 // is alive closure |
|
4dfb2df418f2
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diff
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|
2253 // (for efficiency/performance) |
|
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|
2254 false); |
|
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|
2255 // Setting next fields of discovered |
|
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|
2256 // lists requires a barrier. |
| 342 | 2257 } |
| 2258 | |
| 2259 size_t G1CollectedHeap::capacity() const { | |
| 2260 return _g1_committed.byte_size(); | |
| 2261 } | |
| 2262 | |
|
6254
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|
2263 void G1CollectedHeap::reset_gc_time_stamps(HeapRegion* hr) { |
|
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|
2264 assert(!hr->continuesHumongous(), "pre-condition"); |
|
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|
2265 hr->reset_gc_time_stamp(); |
|
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changeset
|
2266 if (hr->startsHumongous()) { |
|
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changeset
|
2267 uint first_index = hr->hrs_index() + 1; |
|
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changeset
|
2268 uint last_index = hr->last_hc_index(); |
|
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|
2269 for (uint i = first_index; i < last_index; i += 1) { |
|
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|
2270 HeapRegion* chr = region_at(i); |
|
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|
2271 assert(chr->continuesHumongous(), "sanity"); |
|
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|
2272 chr->reset_gc_time_stamp(); |
|
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|
2273 } |
|
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|
2274 } |
|
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|
2275 } |
|
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|
2276 |
|
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|
2277 #ifndef PRODUCT |
|
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|
2278 class CheckGCTimeStampsHRClosure : public HeapRegionClosure { |
|
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|
2279 private: |
|
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|
2280 unsigned _gc_time_stamp; |
|
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|
2281 bool _failures; |
|
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|
2282 |
|
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|
2283 public: |
|
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|
2284 CheckGCTimeStampsHRClosure(unsigned gc_time_stamp) : |
|
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|
2285 _gc_time_stamp(gc_time_stamp), _failures(false) { } |
|
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|
2286 |
|
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|
2287 virtual bool doHeapRegion(HeapRegion* hr) { |
|
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|
2288 unsigned region_gc_time_stamp = hr->get_gc_time_stamp(); |
|
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|
2289 if (_gc_time_stamp != region_gc_time_stamp) { |
|
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|
2290 gclog_or_tty->print_cr("Region "HR_FORMAT" has GC time stamp = %d, " |
|
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|
2291 "expected %d", HR_FORMAT_PARAMS(hr), |
|
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|
2292 region_gc_time_stamp, _gc_time_stamp); |
|
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|
2293 _failures = true; |
|
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|
2294 } |
|
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|
2295 return false; |
|
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|
2296 } |
|
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|
2297 |
|
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|
2298 bool failures() { return _failures; } |
|
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|
2299 }; |
|
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|
2300 |
|
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|
2301 void G1CollectedHeap::check_gc_time_stamps() { |
|
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|
2302 CheckGCTimeStampsHRClosure cl(_gc_time_stamp); |
|
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|
2303 heap_region_iterate(&cl); |
|
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|
2304 guarantee(!cl.failures(), "all GC time stamps should have been reset"); |
|
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|
2305 } |
|
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|
2306 #endif // PRODUCT |
|
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|
2307 |
| 1705 | 2308 void G1CollectedHeap::iterate_dirty_card_closure(CardTableEntryClosure* cl, |
| 2309 DirtyCardQueue* into_cset_dcq, | |
| 2310 bool concurrent, | |
| 342 | 2311 int worker_i) { |
| 889 | 2312 // Clean cards in the hot card cache |
| 1705 | 2313 concurrent_g1_refine()->clean_up_cache(worker_i, g1_rem_set(), into_cset_dcq); |
| 889 | 2314 |
| 342 | 2315 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); |
| 2316 int n_completed_buffers = 0; | |
| 1705 | 2317 while (dcqs.apply_closure_to_completed_buffer(cl, worker_i, 0, true)) { |
| 342 | 2318 n_completed_buffers++; |
| 2319 } | |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
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6188
diff
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|
2320 g1_policy()->phase_times()->record_update_rs_processed_buffers(worker_i, |
| 342 | 2321 (double) n_completed_buffers); |
| 2322 dcqs.clear_n_completed_buffers(); | |
| 2323 assert(!dcqs.completed_buffers_exist_dirty(), "Completed buffers exist!"); | |
| 2324 } | |
| 2325 | |
| 2326 | |
| 2327 // Computes the sum of the storage used by the various regions. | |
| 2328 | |
| 2329 size_t G1CollectedHeap::used() const { | |
|
862
36b5611220a7
6863216: Clean up debugging debris inadvertently pushed with 6700789
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861
diff
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|
2330 assert(Heap_lock->owner() != NULL, |
|
36b5611220a7
6863216: Clean up debugging debris inadvertently pushed with 6700789
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diff
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|
2331 "Should be owned on this thread's behalf."); |
| 342 | 2332 size_t result = _summary_bytes_used; |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
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diff
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|
2333 // Read only once in case it is set to NULL concurrently |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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diff
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|
2334 HeapRegion* hr = _mutator_alloc_region.get(); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
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|
2335 if (hr != NULL) |
|
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diff
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|
2336 result += hr->used(); |
| 342 | 2337 return result; |
| 2338 } | |
| 2339 | |
|
846
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
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diff
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|
2340 size_t G1CollectedHeap::used_unlocked() const { |
|
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
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diff
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|
2341 size_t result = _summary_bytes_used; |
|
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
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|
2342 return result; |
|
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
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diff
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|
2343 } |
|
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
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845
diff
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|
2344 |
| 342 | 2345 class SumUsedClosure: public HeapRegionClosure { |
| 2346 size_t _used; | |
| 2347 public: | |
| 2348 SumUsedClosure() : _used(0) {} | |
| 2349 bool doHeapRegion(HeapRegion* r) { | |
| 2350 if (!r->continuesHumongous()) { | |
| 2351 _used += r->used(); | |
| 2352 } | |
| 2353 return false; | |
| 2354 } | |
| 2355 size_t result() { return _used; } | |
| 2356 }; | |
| 2357 | |
| 2358 size_t G1CollectedHeap::recalculate_used() const { | |
| 2359 SumUsedClosure blk; | |
| 3766 | 2360 heap_region_iterate(&blk); |
| 342 | 2361 return blk.result(); |
| 2362 } | |
| 2363 | |
| 2364 size_t G1CollectedHeap::unsafe_max_alloc() { | |
| 2152 | 2365 if (free_regions() > 0) return HeapRegion::GrainBytes; |
| 342 | 2366 // otherwise, is there space in the current allocation region? |
| 2367 | |
| 2368 // We need to store the current allocation region in a local variable | |
| 2369 // here. The problem is that this method doesn't take any locks and | |
| 2370 // there may be other threads which overwrite the current allocation | |
| 2371 // region field. attempt_allocation(), for example, sets it to NULL | |
| 2372 // and this can happen *after* the NULL check here but before the call | |
| 2373 // to free(), resulting in a SIGSEGV. Note that this doesn't appear | |
| 2374 // to be a problem in the optimized build, since the two loads of the | |
| 2375 // current allocation region field are optimized away. | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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|
2376 HeapRegion* hr = _mutator_alloc_region.get(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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|
2377 if (hr == NULL) { |
| 342 | 2378 return 0; |
| 2379 } | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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diff
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|
2380 return hr->free(); |
| 342 | 2381 } |
| 2382 | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
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|
2383 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
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4875
diff
changeset
|
2384 switch (cause) { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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4875
diff
changeset
|
2385 case GCCause::_gc_locker: return GCLockerInvokesConcurrent; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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4875
diff
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|
2386 case GCCause::_java_lang_system_gc: return ExplicitGCInvokesConcurrent; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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4875
diff
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|
2387 case GCCause::_g1_humongous_allocation: return true; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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4875
diff
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|
2388 default: return false; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2389 } |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2390 } |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
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1611
diff
changeset
|
2391 |
|
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
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2433
diff
changeset
|
2392 #ifndef PRODUCT |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
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2433
diff
changeset
|
2393 void G1CollectedHeap::allocate_dummy_regions() { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2394 // Let's fill up most of the region |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
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2433
diff
changeset
|
2395 size_t word_size = HeapRegion::GrainWords - 1024; |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2396 // 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
|
2397 guarantee(isHumongous(word_size), "sanity"); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2398 |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2399 for (uintx i = 0; i < G1DummyRegionsPerGC; ++i) { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2400 // 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
|
2401 HeapWord* dummy_obj = humongous_obj_allocate(word_size); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2402 if (dummy_obj != NULL) { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2403 MemRegion mr(dummy_obj, word_size); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2404 CollectedHeap::fill_with_object(mr); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2405 } else { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2406 // 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
|
2407 // again. Let's get out of the loop. |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2408 break; |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2409 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2410 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2411 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2412 #endif // !PRODUCT |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2413 |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2414 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
|
2415 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
|
2416 _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
|
2417 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
|
2418 _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
|
2419 |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2420 _old_marking_cycles_started++; |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2421 } |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2422 |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2423 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
|
2424 MonitorLockerEx x(FullGCCount_lock, Mutex::_no_safepoint_check_flag); |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2425 |
|
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2426 // 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
|
2427 // 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
|
2428 // 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
|
2429 // assert here. |
|
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2430 |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2431 // Given that this method is called at the end of a Full GC or of a |
|
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6944166: G1: explicit GCs are not always handled correctly
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|
2432 // concurrent cycle, and those can be nested (i.e., a Full GC can |
|
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6944166: G1: explicit GCs are not always handled correctly
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|
2433 // interrupt a concurrent cycle), the number of full collections |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
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changeset
|
2434 // completed should be either one (in the case where there was no |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
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|
2435 // nesting) or two (when a Full GC interrupted a concurrent cycle) |
|
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|
2436 // behind the number of full collections started. |
|
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6944166: G1: explicit GCs are not always handled correctly
tonyp
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|
2437 |
|
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6944166: G1: explicit GCs are not always handled correctly
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diff
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|
2438 // 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
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1995
diff
changeset
|
2439 assert(concurrent || |
|
6120
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7172388: G1: _total_full_collections should not be incremented for concurrent cycles
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|
2440 (_old_marking_cycles_started == _old_marking_cycles_completed + 1) || |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
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changeset
|
2441 (_old_marking_cycles_started == _old_marking_cycles_completed + 2), |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
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|
2442 err_msg("for inner caller (Full GC): _old_marking_cycles_started = %u " |
|
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7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
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|
2443 "is inconsistent with _old_marking_cycles_completed = %u", |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
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|
2444 _old_marking_cycles_started, _old_marking_cycles_completed)); |
|
1656
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6944166: G1: explicit GCs are not always handled correctly
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|
2445 |
|
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6944166: G1: explicit GCs are not always handled correctly
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diff
changeset
|
2446 // 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
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1995
diff
changeset
|
2447 assert(!concurrent || |
|
6120
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7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
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changeset
|
2448 (_old_marking_cycles_started == _old_marking_cycles_completed + 1), |
|
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
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diff
changeset
|
2449 err_msg("for outer caller (concurrent cycle): " |
|
6120
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7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
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changeset
|
2450 "_old_marking_cycles_started = %u " |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
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|
2451 "is inconsistent with _old_marking_cycles_completed = %u", |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
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changeset
|
2452 _old_marking_cycles_started, _old_marking_cycles_completed)); |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
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changeset
|
2453 |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
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changeset
|
2454 _old_marking_cycles_completed += 1; |
|
1656
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6944166: G1: explicit GCs are not always handled correctly
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|
2455 |
|
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2456 // 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
|
2457 // we wake up any waiters (especially when ExplicitInvokesConcurrent |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2458 // 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
|
2459 // 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
|
2460 if (concurrent) { |
|
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2461 _cmThread->clear_in_progress(); |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2462 } |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2463 |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2464 // This notify_all() will ensure that a thread that called |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
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parents:
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diff
changeset
|
2465 // System.gc() with (with ExplicitGCInvokesConcurrent set or not) |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
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parents:
1611
diff
changeset
|
2466 // 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
|
2467 // waiting in VM_G1IncCollectionPause::doit_epilogue(). |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
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parents:
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changeset
|
2468 FullGCCount_lock->notify_all(); |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
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changeset
|
2469 } |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
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|
2470 |
| 342 | 2471 void G1CollectedHeap::collect_as_vm_thread(GCCause::Cause cause) { |
| 2152 | 2472 assert_at_safepoint(true /* should_be_vm_thread */); |
| 342 | 2473 GCCauseSetter gcs(this, cause); |
| 2474 switch (cause) { | |
| 2475 case GCCause::_heap_inspection: | |
| 2476 case GCCause::_heap_dump: { | |
| 2477 HandleMark hm; | |
| 2478 do_full_collection(false); // don't clear all soft refs | |
| 2479 break; | |
| 2480 } | |
| 2481 default: // XXX FIX ME | |
| 2482 ShouldNotReachHere(); // Unexpected use of this function | |
| 2483 } | |
| 2484 } | |
| 2485 | |
|
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2486 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
|
2487 assert_heap_not_locked(); |
|
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2488 |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2489 unsigned int gc_count_before; |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2490 unsigned int old_marking_count_before; |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2491 bool retry_gc; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2492 |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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parents:
4875
diff
changeset
|
2493 do { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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parents:
4875
diff
changeset
|
2494 retry_gc = false; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2495 |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2496 { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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parents:
4875
diff
changeset
|
2497 MutexLocker ml(Heap_lock); |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2498 |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2499 // Read the GC count while holding the Heap_lock |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2500 gc_count_before = total_collections(); |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2501 old_marking_count_before = _old_marking_cycles_started; |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2502 } |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2503 |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2504 if (should_do_concurrent_full_gc(cause)) { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2505 // Schedule an initial-mark evacuation pause that will start a |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2506 // concurrent cycle. We're setting word_size to 0 which means that |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2507 // we are not requesting a post-GC allocation. |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2508 VM_G1IncCollectionPause op(gc_count_before, |
| 1973 | 2509 0, /* word_size */ |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2510 true, /* should_initiate_conc_mark */ |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2511 g1_policy()->max_pause_time_ms(), |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2512 cause); |
|
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2513 |
|
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2514 VMThread::execute(&op); |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2515 if (!op.pause_succeeded()) { |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2516 if (old_marking_count_before == _old_marking_cycles_started) { |
|
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2517 retry_gc = op.should_retry_gc(); |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2518 } else { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2519 // A Full GC happened while we were trying to schedule the |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2520 // initial-mark GC. No point in starting a new cycle given |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2521 // that the whole heap was collected anyway. |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2522 } |
|
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2523 |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2524 if (retry_gc) { |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2525 if (GC_locker::is_active_and_needs_gc()) { |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2526 GC_locker::stall_until_clear(); |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2527 } |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2528 } |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2529 } |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2530 } else { |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2531 if (cause == GCCause::_gc_locker |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2532 DEBUG_ONLY(|| cause == GCCause::_scavenge_alot)) { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2533 |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2534 // Schedule a standard evacuation pause. We're setting word_size |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2535 // to 0 which means that we are not requesting a post-GC allocation. |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2536 VM_G1IncCollectionPause op(gc_count_before, |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2537 0, /* word_size */ |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2538 false, /* should_initiate_conc_mark */ |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2539 g1_policy()->max_pause_time_ms(), |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2540 cause); |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2541 VMThread::execute(&op); |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2542 } else { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2543 // Schedule a Full GC. |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2544 VM_G1CollectFull op(gc_count_before, old_marking_count_before, cause); |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2545 VMThread::execute(&op); |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2546 } |
|
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2547 } |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2548 } while (retry_gc); |
| 342 | 2549 } |
| 2550 | |
| 2551 bool G1CollectedHeap::is_in(const void* p) const { | |
| 4708 | 2552 if (_g1_committed.contains(p)) { |
| 2553 // Given that we know that p is in the committed space, | |
| 2554 // heap_region_containing_raw() should successfully | |
| 2555 // return the containing region. | |
| 2556 HeapRegion* hr = heap_region_containing_raw(p); | |
| 342 | 2557 return hr->is_in(p); |
| 2558 } else { | |
| 2559 return _perm_gen->as_gen()->is_in(p); | |
| 2560 } | |
| 2561 } | |
| 2562 | |
| 2563 // Iteration functions. | |
| 2564 | |
| 2565 // Iterates an OopClosure over all ref-containing fields of objects | |
| 2566 // within a HeapRegion. | |
| 2567 | |
| 2568 class IterateOopClosureRegionClosure: public HeapRegionClosure { | |
| 2569 MemRegion _mr; | |
| 2570 OopClosure* _cl; | |
| 2571 public: | |
| 2572 IterateOopClosureRegionClosure(MemRegion mr, OopClosure* cl) | |
| 2573 : _mr(mr), _cl(cl) {} | |
| 2574 bool doHeapRegion(HeapRegion* r) { | |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2575 if (!r->continuesHumongous()) { |
| 342 | 2576 r->oop_iterate(_cl); |
| 2577 } | |
| 2578 return false; | |
| 2579 } | |
| 2580 }; | |
| 2581 | |
| 678 | 2582 void G1CollectedHeap::oop_iterate(OopClosure* cl, bool do_perm) { |
| 342 | 2583 IterateOopClosureRegionClosure blk(_g1_committed, cl); |
| 3766 | 2584 heap_region_iterate(&blk); |
| 678 | 2585 if (do_perm) { |
| 2586 perm_gen()->oop_iterate(cl); | |
| 2587 } | |
| 342 | 2588 } |
| 2589 | |
| 678 | 2590 void G1CollectedHeap::oop_iterate(MemRegion mr, OopClosure* cl, bool do_perm) { |
| 342 | 2591 IterateOopClosureRegionClosure blk(mr, cl); |
| 3766 | 2592 heap_region_iterate(&blk); |
| 678 | 2593 if (do_perm) { |
| 2594 perm_gen()->oop_iterate(cl); | |
| 2595 } | |
| 342 | 2596 } |
| 2597 | |
| 2598 // Iterates an ObjectClosure over all objects within a HeapRegion. | |
| 2599 | |
| 2600 class IterateObjectClosureRegionClosure: public HeapRegionClosure { | |
| 2601 ObjectClosure* _cl; | |
| 2602 public: | |
| 2603 IterateObjectClosureRegionClosure(ObjectClosure* cl) : _cl(cl) {} | |
| 2604 bool doHeapRegion(HeapRegion* r) { | |
| 2605 if (! r->continuesHumongous()) { | |
| 2606 r->object_iterate(_cl); | |
| 2607 } | |
| 2608 return false; | |
| 2609 } | |
| 2610 }; | |
| 2611 | |
| 678 | 2612 void G1CollectedHeap::object_iterate(ObjectClosure* cl, bool do_perm) { |
| 342 | 2613 IterateObjectClosureRegionClosure blk(cl); |
| 3766 | 2614 heap_region_iterate(&blk); |
| 678 | 2615 if (do_perm) { |
| 2616 perm_gen()->object_iterate(cl); | |
| 2617 } | |
| 342 | 2618 } |
| 2619 | |
| 2620 void G1CollectedHeap::object_iterate_since_last_GC(ObjectClosure* cl) { | |
| 2621 // FIXME: is this right? | |
| 2622 guarantee(false, "object_iterate_since_last_GC not supported by G1 heap"); | |
| 2623 } | |
| 2624 | |
| 2625 // Calls a SpaceClosure on a HeapRegion. | |
| 2626 | |
| 2627 class SpaceClosureRegionClosure: public HeapRegionClosure { | |
| 2628 SpaceClosure* _cl; | |
| 2629 public: | |
| 2630 SpaceClosureRegionClosure(SpaceClosure* cl) : _cl(cl) {} | |
| 2631 bool doHeapRegion(HeapRegion* r) { | |
| 2632 _cl->do_space(r); | |
| 2633 return false; | |
| 2634 } | |
| 2635 }; | |
| 2636 | |
| 2637 void G1CollectedHeap::space_iterate(SpaceClosure* cl) { | |
| 2638 SpaceClosureRegionClosure blk(cl); | |
| 3766 | 2639 heap_region_iterate(&blk); |
| 342 | 2640 } |
| 2641 | |
| 3766 | 2642 void G1CollectedHeap::heap_region_iterate(HeapRegionClosure* cl) const { |
| 2643 _hrs.iterate(cl); | |
| 342 | 2644 } |
| 2645 | |
| 2646 void | |
| 2647 G1CollectedHeap::heap_region_par_iterate_chunked(HeapRegionClosure* cl, | |
|
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2648 uint worker_id, |
|
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2649 uint no_of_par_workers, |
| 342 | 2650 jint claim_value) { |
|
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2651 const uint regions = n_regions(); |
|
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2652 const uint max_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
|
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2653 no_of_par_workers : |
|
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|
2654 1); |
|
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|
2655 assert(UseDynamicNumberOfGCThreads || |
|
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2656 no_of_par_workers == workers()->total_workers(), |
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2657 "Non dynamic should use fixed number of workers"); |
| 355 | 2658 // try to spread out the starting points of the workers |
|
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2659 const HeapRegion* start_hr = |
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2660 start_region_for_worker(worker_id, no_of_par_workers); |
|
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2661 const uint start_index = start_hr->hrs_index(); |
| 355 | 2662 |
| 2663 // each worker will actually look at all regions | |
|
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2664 for (uint count = 0; count < regions; ++count) { |
|
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2665 const uint index = (start_index + count) % regions; |
| 355 | 2666 assert(0 <= index && index < regions, "sanity"); |
| 2667 HeapRegion* r = region_at(index); | |
| 2668 // we'll ignore "continues humongous" regions (we'll process them | |
| 2669 // when we come across their corresponding "start humongous" | |
| 2670 // region) and regions already claimed | |
| 2671 if (r->claim_value() == claim_value || r->continuesHumongous()) { | |
| 2672 continue; | |
| 2673 } | |
| 2674 // OK, try to claim it | |
| 342 | 2675 if (r->claimHeapRegion(claim_value)) { |
| 355 | 2676 // success! |
| 2677 assert(!r->continuesHumongous(), "sanity"); | |
| 2678 if (r->startsHumongous()) { | |
| 2679 // If the region is "starts humongous" we'll iterate over its | |
| 2680 // "continues humongous" first; in fact we'll do them | |
| 2681 // first. The order is important. In on case, calling the | |
| 2682 // closure on the "starts humongous" region might de-allocate | |
| 2683 // and clear all its "continues humongous" regions and, as a | |
| 2684 // result, we might end up processing them twice. So, we'll do | |
| 2685 // them first (notice: most closures will ignore them anyway) and | |
| 2686 // then we'll do the "starts humongous" region. | |
|
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|
2687 for (uint ch_index = index + 1; ch_index < regions; ++ch_index) { |
| 355 | 2688 HeapRegion* chr = region_at(ch_index); |
| 2689 | |
| 2690 // if the region has already been claimed or it's not | |
| 2691 // "continues humongous" we're done | |
| 2692 if (chr->claim_value() == claim_value || | |
| 2693 !chr->continuesHumongous()) { | |
| 2694 break; | |
| 2695 } | |
| 2696 | |
| 2697 // Noone should have claimed it directly. We can given | |
| 2698 // that we claimed its "starts humongous" region. | |
| 2699 assert(chr->claim_value() != claim_value, "sanity"); | |
| 2700 assert(chr->humongous_start_region() == r, "sanity"); | |
| 2701 | |
| 2702 if (chr->claimHeapRegion(claim_value)) { | |
| 2703 // we should always be able to claim it; noone else should | |
| 2704 // be trying to claim this region | |
| 2705 | |
| 2706 bool res2 = cl->doHeapRegion(chr); | |
| 2707 assert(!res2, "Should not abort"); | |
| 2708 | |
| 2709 // Right now, this holds (i.e., no closure that actually | |
| 2710 // does something with "continues humongous" regions | |
| 2711 // clears them). We might have to weaken it in the future, | |
| 2712 // but let's leave these two asserts here for extra safety. | |
| 2713 assert(chr->continuesHumongous(), "should still be the case"); | |
| 2714 assert(chr->humongous_start_region() == r, "sanity"); | |
| 2715 } else { | |
| 2716 guarantee(false, "we should not reach here"); | |
| 2717 } | |
| 2718 } | |
| 2719 } | |
| 2720 | |
| 2721 assert(!r->continuesHumongous(), "sanity"); | |
| 2722 bool res = cl->doHeapRegion(r); | |
| 2723 assert(!res, "Should not abort"); | |
| 2724 } | |
| 2725 } | |
| 2726 } | |
| 2727 | |
| 390 | 2728 class ResetClaimValuesClosure: public HeapRegionClosure { |
| 2729 public: | |
| 2730 bool doHeapRegion(HeapRegion* r) { | |
| 2731 r->set_claim_value(HeapRegion::InitialClaimValue); | |
| 2732 return false; | |
| 2733 } | |
| 2734 }; | |
| 2735 | |
|
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|
2736 void G1CollectedHeap::reset_heap_region_claim_values() { |
| 390 | 2737 ResetClaimValuesClosure blk; |
| 2738 heap_region_iterate(&blk); | |
| 2739 } | |
| 2740 | |
|
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2741 void G1CollectedHeap::reset_cset_heap_region_claim_values() { |
|
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|
2742 ResetClaimValuesClosure blk; |
|
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|
2743 collection_set_iterate(&blk); |
|
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|
2744 } |
|
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|
2745 |
| 355 | 2746 #ifdef ASSERT |
| 2747 // This checks whether all regions in the heap have the correct claim | |
| 2748 // value. I also piggy-backed on this a check to ensure that the | |
| 2749 // humongous_start_region() information on "continues humongous" | |
| 2750 // regions is correct. | |
| 2751 | |
| 2752 class CheckClaimValuesClosure : public HeapRegionClosure { | |
| 2753 private: | |
| 2754 jint _claim_value; | |
|
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2755 uint _failures; |
| 355 | 2756 HeapRegion* _sh_region; |
|
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2757 |
| 355 | 2758 public: |
| 2759 CheckClaimValuesClosure(jint claim_value) : | |
| 2760 _claim_value(claim_value), _failures(0), _sh_region(NULL) { } | |
| 2761 bool doHeapRegion(HeapRegion* r) { | |
| 2762 if (r->claim_value() != _claim_value) { | |
|
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|
2763 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
| 355 | 2764 "claim value = %d, should be %d", |
|
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|
2765 HR_FORMAT_PARAMS(r), |
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|
2766 r->claim_value(), _claim_value); |
| 355 | 2767 ++_failures; |
| 2768 } | |
| 2769 if (!r->isHumongous()) { | |
| 2770 _sh_region = NULL; | |
| 2771 } else if (r->startsHumongous()) { | |
| 2772 _sh_region = r; | |
| 2773 } else if (r->continuesHumongous()) { | |
| 2774 if (r->humongous_start_region() != _sh_region) { | |
|
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|
2775 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
| 355 | 2776 "HS = "PTR_FORMAT", should be "PTR_FORMAT, |
|
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|
2777 HR_FORMAT_PARAMS(r), |
| 355 | 2778 r->humongous_start_region(), |
| 2779 _sh_region); | |
| 2780 ++_failures; | |
| 342 | 2781 } |
| 2782 } | |
| 355 | 2783 return false; |
| 2784 } | |
|
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|
2785 uint failures() { return _failures; } |
| 355 | 2786 }; |
| 2787 | |
| 2788 bool G1CollectedHeap::check_heap_region_claim_values(jint claim_value) { | |
| 2789 CheckClaimValuesClosure cl(claim_value); | |
| 2790 heap_region_iterate(&cl); | |
| 2791 return cl.failures() == 0; | |
| 2792 } | |
|
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|
2793 |
|
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|
2794 class CheckClaimValuesInCSetHRClosure: public HeapRegionClosure { |
|
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2795 private: |
|
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|
2796 jint _claim_value; |
|
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|
2797 uint _failures; |
|
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|
2798 |
|
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|
2799 public: |
|
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|
2800 CheckClaimValuesInCSetHRClosure(jint claim_value) : |
|
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|
2801 _claim_value(claim_value), _failures(0) { } |
|
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2802 |
|
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|
2803 uint failures() { return _failures; } |
|
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|
2804 |
|
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|
2805 bool doHeapRegion(HeapRegion* hr) { |
|
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|
2806 assert(hr->in_collection_set(), "how?"); |
|
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|
2807 assert(!hr->isHumongous(), "H-region in CSet"); |
|
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|
2808 if (hr->claim_value() != _claim_value) { |
|
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|
2809 gclog_or_tty->print_cr("CSet Region " HR_FORMAT ", " |
|
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|
2810 "claim value = %d, should be %d", |
|
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|
2811 HR_FORMAT_PARAMS(hr), |
|
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|
2812 hr->claim_value(), _claim_value); |
|
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|
2813 _failures += 1; |
|
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|
2814 } |
|
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|
2815 return false; |
|
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|
2816 } |
|
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|
2817 }; |
|
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|
2818 |
|
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|
2819 bool G1CollectedHeap::check_cset_heap_region_claim_values(jint claim_value) { |
|
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|
2820 CheckClaimValuesInCSetHRClosure cl(claim_value); |
|
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|
2821 collection_set_iterate(&cl); |
|
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|
2822 return cl.failures() == 0; |
|
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|
2823 } |
| 355 | 2824 #endif // ASSERT |
| 342 | 2825 |
|
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|
2826 // Clear the cached CSet starting regions and (more importantly) |
|
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|
2827 // the time stamps. Called when we reset the GC time stamp. |
|
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|
2828 void G1CollectedHeap::clear_cset_start_regions() { |
|
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|
2829 assert(_worker_cset_start_region != NULL, "sanity"); |
|
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|
2830 assert(_worker_cset_start_region_time_stamp != NULL, "sanity"); |
|
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|
2831 |
|
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|
2832 int n_queues = MAX2((int)ParallelGCThreads, 1); |
|
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|
2833 for (int i = 0; i < n_queues; i++) { |
|
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|
2834 _worker_cset_start_region[i] = NULL; |
|
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|
2835 _worker_cset_start_region_time_stamp[i] = 0; |
|
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|
2836 } |
|
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|
2837 } |
|
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|
2838 |
|
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|
2839 // Given the id of a worker, obtain or calculate a suitable |
|
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|
2840 // starting region for iterating over the current collection set. |
|
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2841 HeapRegion* G1CollectedHeap::start_cset_region_for_worker(int worker_i) { |
|
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2842 assert(get_gc_time_stamp() > 0, "should have been updated by now"); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2843 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2844 HeapRegion* result = NULL; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2845 unsigned gc_time_stamp = get_gc_time_stamp(); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2846 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2847 if (_worker_cset_start_region_time_stamp[worker_i] == gc_time_stamp) { |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2848 // Cached starting region for current worker was set |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2849 // during the current pause - so it's valid. |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2850 // Note: the cached starting heap region may be NULL |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2851 // (when the collection set is empty). |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2852 result = _worker_cset_start_region[worker_i]; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2853 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
|
2854 return result; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2855 } |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2856 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2857 // The cached entry was not valid so let's calculate |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2858 // a suitable starting heap region for this worker. |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2859 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2860 // We want the parallel threads to start their collection |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2861 // set iteration at different collection set regions to |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2862 // avoid contention. |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2863 // If we have: |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2864 // n collection set regions |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2865 // p threads |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2866 // Then thread t will start at region floor ((t * n) / p) |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2867 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2868 result = g1_policy()->collection_set(); |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2869 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2870 uint cs_size = g1_policy()->cset_region_length(); |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
2871 uint active_workers = workers()->active_workers(); |
|
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2872 assert(UseDynamicNumberOfGCThreads || |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2873 active_workers == workers()->total_workers(), |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2874 "Unless dynamic should use total workers"); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2875 |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2876 uint end_ind = (cs_size * worker_i) / active_workers; |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2877 uint start_ind = 0; |
|
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2878 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2879 if (worker_i > 0 && |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2880 _worker_cset_start_region_time_stamp[worker_i - 1] == gc_time_stamp) { |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2881 // Previous workers starting region is valid |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2882 // so let's iterate from there |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2883 start_ind = (cs_size * (worker_i - 1)) / active_workers; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2884 result = _worker_cset_start_region[worker_i - 1]; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2885 } |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2886 |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2887 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
|
2888 result = result->next_in_collection_set(); |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2889 } |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2890 } |
|
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2891 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2892 // 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
|
2893 // (when the collection set is empty). |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2894 assert(result == NULL || result->in_collection_set(), "sanity"); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2895 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
|
2896 "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
|
2897 _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
|
2898 OrderAccess::storestore(); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2899 _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
|
2900 return result; |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2901 } |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2902 |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2903 HeapRegion* G1CollectedHeap::start_region_for_worker(uint worker_i, |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2904 uint no_of_par_workers) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2905 uint worker_num = |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2906 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
|
2907 assert(UseDynamicNumberOfGCThreads || |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2908 no_of_par_workers == workers()->total_workers(), |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2909 "Non dynamic should use fixed number of workers"); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2910 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
|
2911 return region_at(start_index); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2912 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2913 |
| 342 | 2914 void G1CollectedHeap::collection_set_iterate(HeapRegionClosure* cl) { |
| 2915 HeapRegion* r = g1_policy()->collection_set(); | |
| 2916 while (r != NULL) { | |
| 2917 HeapRegion* next = r->next_in_collection_set(); | |
| 2918 if (cl->doHeapRegion(r)) { | |
| 2919 cl->incomplete(); | |
| 2920 return; | |
| 2921 } | |
| 2922 r = next; | |
| 2923 } | |
| 2924 } | |
| 2925 | |
| 2926 void G1CollectedHeap::collection_set_iterate_from(HeapRegion* r, | |
| 2927 HeapRegionClosure *cl) { | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2928 if (r == NULL) { |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2929 // 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
|
2930 return; |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2931 } |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2932 |
| 342 | 2933 assert(r->in_collection_set(), |
| 2934 "Start region must be a member of the collection set."); | |
| 2935 HeapRegion* cur = r; | |
| 2936 while (cur != NULL) { | |
| 2937 HeapRegion* next = cur->next_in_collection_set(); | |
| 2938 if (cl->doHeapRegion(cur) && false) { | |
| 2939 cl->incomplete(); | |
| 2940 return; | |
| 2941 } | |
| 2942 cur = next; | |
| 2943 } | |
| 2944 cur = g1_policy()->collection_set(); | |
| 2945 while (cur != r) { | |
| 2946 HeapRegion* next = cur->next_in_collection_set(); | |
| 2947 if (cl->doHeapRegion(cur) && false) { | |
| 2948 cl->incomplete(); | |
| 2949 return; | |
| 2950 } | |
| 2951 cur = next; | |
| 2952 } | |
| 2953 } | |
| 2954 | |
| 2955 CompactibleSpace* G1CollectedHeap::first_compactible_space() { | |
| 3766 | 2956 return n_regions() > 0 ? region_at(0) : NULL; |
| 342 | 2957 } |
| 2958 | |
| 2959 | |
| 2960 Space* G1CollectedHeap::space_containing(const void* addr) const { | |
| 2961 Space* res = heap_region_containing(addr); | |
| 2962 if (res == NULL) | |
| 2963 res = perm_gen()->space_containing(addr); | |
| 2964 return res; | |
| 2965 } | |
| 2966 | |
| 2967 HeapWord* G1CollectedHeap::block_start(const void* addr) const { | |
| 2968 Space* sp = space_containing(addr); | |
| 2969 if (sp != NULL) { | |
| 2970 return sp->block_start(addr); | |
| 2971 } | |
| 2972 return NULL; | |
| 2973 } | |
| 2974 | |
| 2975 size_t G1CollectedHeap::block_size(const HeapWord* addr) const { | |
| 2976 Space* sp = space_containing(addr); | |
| 2977 assert(sp != NULL, "block_size of address outside of heap"); | |
| 2978 return sp->block_size(addr); | |
| 2979 } | |
| 2980 | |
| 2981 bool G1CollectedHeap::block_is_obj(const HeapWord* addr) const { | |
| 2982 Space* sp = space_containing(addr); | |
| 2983 return sp->block_is_obj(addr); | |
| 2984 } | |
| 2985 | |
| 2986 bool G1CollectedHeap::supports_tlab_allocation() const { | |
| 2987 return true; | |
| 2988 } | |
| 2989 | |
| 2990 size_t G1CollectedHeap::tlab_capacity(Thread* ignored) const { | |
| 2991 return HeapRegion::GrainBytes; | |
| 2992 } | |
| 2993 | |
| 2994 size_t G1CollectedHeap::unsafe_max_tlab_alloc(Thread* ignored) const { | |
| 2995 // Return the remaining space in the cur alloc region, but not less than | |
| 2996 // the min TLAB size. | |
|
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2997 |
|
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2998 // 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
|
2999 // 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
|
3000 // humongous objects. |
|
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
3001 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3002 HeapRegion* hr = _mutator_alloc_region.get(); |
|
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
3003 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
|
3004 if (hr == NULL) { |
|
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
3005 return max_tlab_size; |
| 342 | 3006 } else { |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3007 return MIN2(MAX2(hr->free(), (size_t) MinTLABSize), max_tlab_size); |
| 342 | 3008 } |
| 3009 } | |
| 3010 | |
| 3011 size_t G1CollectedHeap::max_capacity() const { | |
|
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
3012 return _g1_reserved.byte_size(); |
| 342 | 3013 } |
| 3014 | |
| 3015 jlong G1CollectedHeap::millis_since_last_gc() { | |
| 3016 // assert(false, "NYI"); | |
| 3017 return 0; | |
| 3018 } | |
| 3019 | |
| 3020 void G1CollectedHeap::prepare_for_verify() { | |
| 3021 if (SafepointSynchronize::is_at_safepoint() || ! UseTLAB) { | |
| 3022 ensure_parsability(false); | |
| 3023 } | |
| 3024 g1_rem_set()->prepare_for_verify(); | |
| 3025 } | |
| 3026 | |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3027 bool G1CollectedHeap::allocated_since_marking(oop obj, HeapRegion* hr, |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3028 VerifyOption vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3029 switch (vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3030 case VerifyOption_G1UsePrevMarking: |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3031 return hr->obj_allocated_since_prev_marking(obj); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3032 case VerifyOption_G1UseNextMarking: |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
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|
3033 return hr->obj_allocated_since_next_marking(obj); |
|
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|
3034 case VerifyOption_G1UseMarkWord: |
|
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|
3035 return false; |
|
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|
3036 default: |
|
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|
3037 ShouldNotReachHere(); |
|
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|
3038 } |
|
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|
3039 return false; // keep some compilers happy |
|
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|
3040 } |
|
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|
3041 |
|
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|
3042 HeapWord* G1CollectedHeap::top_at_mark_start(HeapRegion* hr, VerifyOption vo) { |
|
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|
3043 switch (vo) { |
|
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|
3044 case VerifyOption_G1UsePrevMarking: return hr->prev_top_at_mark_start(); |
|
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|
3045 case VerifyOption_G1UseNextMarking: return hr->next_top_at_mark_start(); |
|
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|
3046 case VerifyOption_G1UseMarkWord: return NULL; |
|
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|
3047 default: ShouldNotReachHere(); |
|
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|
3048 } |
|
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|
3049 return NULL; // keep some compilers happy |
|
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|
3050 } |
|
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|
3051 |
|
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|
3052 bool G1CollectedHeap::is_marked(oop obj, VerifyOption vo) { |
|
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|
3053 switch (vo) { |
|
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|
3054 case VerifyOption_G1UsePrevMarking: return isMarkedPrev(obj); |
|
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|
3055 case VerifyOption_G1UseNextMarking: return isMarkedNext(obj); |
|
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|
3056 case VerifyOption_G1UseMarkWord: return obj->is_gc_marked(); |
|
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|
3057 default: ShouldNotReachHere(); |
|
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|
3058 } |
|
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|
3059 return false; // keep some compilers happy |
|
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|
3060 } |
|
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|
3061 |
|
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|
3062 const char* G1CollectedHeap::top_at_mark_start_str(VerifyOption vo) { |
|
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|
3063 switch (vo) { |
|
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|
3064 case VerifyOption_G1UsePrevMarking: return "PTAMS"; |
|
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|
3065 case VerifyOption_G1UseNextMarking: return "NTAMS"; |
|
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|
3066 case VerifyOption_G1UseMarkWord: return "NONE"; |
|
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|
3067 default: ShouldNotReachHere(); |
|
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|
3068 } |
|
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|
3069 return NULL; // keep some compilers happy |
|
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|
3070 } |
|
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|
3071 |
| 342 | 3072 class VerifyLivenessOopClosure: public OopClosure { |
|
3772
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|
3073 G1CollectedHeap* _g1h; |
|
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|
3074 VerifyOption _vo; |
| 342 | 3075 public: |
|
3772
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|
3076 VerifyLivenessOopClosure(G1CollectedHeap* g1h, VerifyOption vo): |
|
6747fd0512e0
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|
3077 _g1h(g1h), _vo(vo) |
|
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|
3078 { } |
|
845
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parents:
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changeset
|
3079 void do_oop(narrowOop *p) { do_oop_work(p); } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
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parents:
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diff
changeset
|
3080 void do_oop( oop *p) { do_oop_work(p); } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
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|
3081 |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
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parents:
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diff
changeset
|
3082 template <class T> void do_oop_work(T *p) { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
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parents:
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changeset
|
3083 oop obj = oopDesc::load_decode_heap_oop(p); |
|
3772
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|
3084 guarantee(obj == NULL || !_g1h->is_obj_dead_cond(obj, _vo), |
|
845
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changeset
|
3085 "Dead object referenced by a not dead object"); |
| 342 | 3086 } |
| 3087 }; | |
| 3088 | |
| 3089 class VerifyObjsInRegionClosure: public ObjectClosure { | |
| 811 | 3090 private: |
| 342 | 3091 G1CollectedHeap* _g1h; |
| 3092 size_t _live_bytes; | |
| 3093 HeapRegion *_hr; | |
|
3772
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changeset
|
3094 VerifyOption _vo; |
| 342 | 3095 public: |
|
3772
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parents:
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diff
changeset
|
3096 // _vo == UsePrevMarking -> use "prev" marking information, |
|
6747fd0512e0
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johnc
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diff
changeset
|
3097 // _vo == UseNextMarking -> use "next" marking information, |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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diff
changeset
|
3098 // _vo == UseMarkWord -> use mark word from object header. |
|
6747fd0512e0
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changeset
|
3099 VerifyObjsInRegionClosure(HeapRegion *hr, VerifyOption vo) |
|
6747fd0512e0
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changeset
|
3100 : _live_bytes(0), _hr(hr), _vo(vo) { |
| 342 | 3101 _g1h = G1CollectedHeap::heap(); |
| 3102 } | |
| 3103 void do_object(oop o) { | |
|
3772
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changeset
|
3104 VerifyLivenessOopClosure isLive(_g1h, _vo); |
| 342 | 3105 assert(o != NULL, "Huh?"); |
|
3772
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changeset
|
3106 if (!_g1h->is_obj_dead_cond(o, _vo)) { |
|
6747fd0512e0
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diff
changeset
|
3107 // If the object is alive according to the mark word, |
|
6747fd0512e0
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diff
changeset
|
3108 // then verify that the marking information agrees. |
|
6747fd0512e0
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diff
changeset
|
3109 // Note we can't verify the contra-positive of the |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
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diff
changeset
|
3110 // above: if the object is dead (according to the mark |
|
6747fd0512e0
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diff
changeset
|
3111 // word), it may not be marked, or may have been marked |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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diff
changeset
|
3112 // but has since became dead, or may have been allocated |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3113 // since the last marking. |
|
6747fd0512e0
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johnc
parents:
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changeset
|
3114 if (_vo == VerifyOption_G1UseMarkWord) { |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3115 guarantee(!_g1h->is_obj_dead(o), "mark word and concurrent mark mismatch"); |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3116 } |
|
6747fd0512e0
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johnc
parents:
3766
diff
changeset
|
3117 |
| 342 | 3118 o->oop_iterate(&isLive); |
|
1389
5dbd9300cf9c
6943926: G1: Integer overflow during heap region verification
johnc
parents:
1388
diff
changeset
|
3119 if (!_hr->obj_allocated_since_prev_marking(o)) { |
|
5dbd9300cf9c
6943926: G1: Integer overflow during heap region verification
johnc
parents:
1388
diff
changeset
|
3120 size_t obj_size = o->size(); // Make sure we don't overflow |
|
5dbd9300cf9c
6943926: G1: Integer overflow during heap region verification
johnc
parents:
1388
diff
changeset
|
3121 _live_bytes += (obj_size * HeapWordSize); |
|
5dbd9300cf9c
6943926: G1: Integer overflow during heap region verification
johnc
parents:
1388
diff
changeset
|
3122 } |
| 342 | 3123 } |
| 3124 } | |
| 3125 size_t live_bytes() { return _live_bytes; } | |
| 3126 }; | |
| 3127 | |
| 3128 class PrintObjsInRegionClosure : public ObjectClosure { | |
| 3129 HeapRegion *_hr; | |
| 3130 G1CollectedHeap *_g1; | |
| 3131 public: | |
| 3132 PrintObjsInRegionClosure(HeapRegion *hr) : _hr(hr) { | |
| 3133 _g1 = G1CollectedHeap::heap(); | |
| 3134 }; | |
| 3135 | |
| 3136 void do_object(oop o) { | |
| 3137 if (o != NULL) { | |
| 3138 HeapWord *start = (HeapWord *) o; | |
| 3139 size_t word_sz = o->size(); | |
| 3140 gclog_or_tty->print("\nPrinting obj "PTR_FORMAT" of size " SIZE_FORMAT | |
| 3141 " isMarkedPrev %d isMarkedNext %d isAllocSince %d\n", | |
| 3142 (void*) o, word_sz, | |
| 3143 _g1->isMarkedPrev(o), | |
| 3144 _g1->isMarkedNext(o), | |
| 3145 _hr->obj_allocated_since_prev_marking(o)); | |
| 3146 HeapWord *end = start + word_sz; | |
| 3147 HeapWord *cur; | |
| 3148 int *val; | |
| 3149 for (cur = start; cur < end; cur++) { | |
| 3150 val = (int *) cur; | |
| 3151 gclog_or_tty->print("\t "PTR_FORMAT":"PTR_FORMAT"\n", val, *val); | |
| 3152 } | |
| 3153 } | |
| 3154 } | |
| 3155 }; | |
| 3156 | |
| 3157 class VerifyRegionClosure: public HeapRegionClosure { | |
| 811 | 3158 private: |
|
6254
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7114678: G1: various small fixes, code cleanup, and refactoring
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diff
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|
3159 bool _par; |
|
a2f7274eb6ef
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changeset
|
3160 VerifyOption _vo; |
|
a2f7274eb6ef
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|
3161 bool _failures; |
| 811 | 3162 public: |
|
3772
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parents:
3766
diff
changeset
|
3163 // _vo == UsePrevMarking -> use "prev" marking information, |
|
6747fd0512e0
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diff
changeset
|
3164 // _vo == UseNextMarking -> use "next" marking information, |
|
6747fd0512e0
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johnc
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diff
changeset
|
3165 // _vo == UseMarkWord -> use mark word from object header. |
| 6008 | 3166 VerifyRegionClosure(bool par, VerifyOption vo) |
| 3167 : _par(par), | |
|
3772
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diff
changeset
|
3168 _vo(vo), |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
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1019
diff
changeset
|
3169 _failures(false) {} |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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1019
diff
changeset
|
3170 |
|
ff2402f6a50b
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diff
changeset
|
3171 bool failures() { |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3172 return _failures; |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
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1019
diff
changeset
|
3173 } |
|
845
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6700789: G1: Enable use of compressed oops with G1 heaps
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diff
changeset
|
3174 |
| 342 | 3175 bool doHeapRegion(HeapRegion* r) { |
|
637
25e146966e7c
6817419: G1: Enable extensive verification for humongous regions
iveresov
parents:
636
diff
changeset
|
3176 if (!r->continuesHumongous()) { |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3177 bool failures = false; |
| 6008 | 3178 r->verify(_vo, &failures); |
|
1020
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diff
changeset
|
3179 if (failures) { |
|
ff2402f6a50b
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1019
diff
changeset
|
3180 _failures = true; |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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1019
diff
changeset
|
3181 } else { |
|
3772
6747fd0512e0
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diff
changeset
|
3182 VerifyObjsInRegionClosure not_dead_yet_cl(r, _vo); |
|
1020
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diff
changeset
|
3183 r->object_iterate(¬_dead_yet_cl); |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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4785
diff
changeset
|
3184 if (_vo != VerifyOption_G1UseNextMarking) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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4785
diff
changeset
|
3185 if (r->max_live_bytes() < not_dead_yet_cl.live_bytes()) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3186 gclog_or_tty->print_cr("["PTR_FORMAT","PTR_FORMAT"] " |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3187 "max_live_bytes "SIZE_FORMAT" " |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3188 "< calculated "SIZE_FORMAT, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
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4785
diff
changeset
|
3189 r->bottom(), r->end(), |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
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4785
diff
changeset
|
3190 r->max_live_bytes(), |
|
1020
ff2402f6a50b
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1019
diff
changeset
|
3191 not_dead_yet_cl.live_bytes()); |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3192 _failures = true; |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3193 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3194 } else { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3195 // When vo == UseNextMarking we cannot currently do a sanity |
|
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3196 // check on the live bytes as the calculation has not been |
|
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3197 // finalized yet. |
|
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|
3198 } |
|
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|
3199 } |
| 342 | 3200 } |
|
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|
3201 return false; // stop the region iteration if we hit a failure |
| 342 | 3202 } |
| 3203 }; | |
| 3204 | |
| 3205 class VerifyRootsClosure: public OopsInGenClosure { | |
| 3206 private: | |
| 3207 G1CollectedHeap* _g1h; | |
|
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3208 VerifyOption _vo; |
| 342 | 3209 bool _failures; |
| 3210 public: | |
|
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3211 // _vo == UsePrevMarking -> use "prev" marking information, |
|
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3212 // _vo == UseNextMarking -> use "next" marking information, |
|
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3213 // _vo == UseMarkWord -> use mark word from object header. |
|
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3214 VerifyRootsClosure(VerifyOption vo) : |
|
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3215 _g1h(G1CollectedHeap::heap()), |
|
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|
3216 _vo(vo), |
|
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|
3217 _failures(false) { } |
| 342 | 3218 |
| 3219 bool failures() { return _failures; } | |
| 3220 | |
|
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|
3221 template <class T> void do_oop_nv(T* p) { |
|
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3222 T heap_oop = oopDesc::load_heap_oop(p); |
|
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3223 if (!oopDesc::is_null(heap_oop)) { |
|
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3224 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
|
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|
3225 if (_g1h->is_obj_dead_cond(obj, _vo)) { |
| 342 | 3226 gclog_or_tty->print_cr("Root location "PTR_FORMAT" " |
|
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|
3227 "points to dead obj "PTR_FORMAT, p, (void*) obj); |
|
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|
3228 if (_vo == VerifyOption_G1UseMarkWord) { |
|
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|
3229 gclog_or_tty->print_cr(" Mark word: "PTR_FORMAT, (void*)(obj->mark())); |
|
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|
3230 } |
| 342 | 3231 obj->print_on(gclog_or_tty); |
| 3232 _failures = true; | |
| 3233 } | |
| 3234 } | |
| 3235 } | |
|
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3236 |
|
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|
3237 void do_oop(oop* p) { do_oop_nv(p); } |
|
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|
3238 void do_oop(narrowOop* p) { do_oop_nv(p); } |
| 342 | 3239 }; |
| 3240 | |
| 390 | 3241 // This is the task used for parallel heap verification. |
| 3242 | |
| 3243 class G1ParVerifyTask: public AbstractGangTask { | |
| 3244 private: | |
| 3245 G1CollectedHeap* _g1h; | |
|
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|
3246 VerifyOption _vo; |
|
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|
3247 bool _failures; |
| 390 | 3248 |
| 3249 public: | |
|
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|
3250 // _vo == UsePrevMarking -> use "prev" marking information, |
|
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|
3251 // _vo == UseNextMarking -> use "next" marking information, |
|
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3252 // _vo == UseMarkWord -> use mark word from object header. |
| 6008 | 3253 G1ParVerifyTask(G1CollectedHeap* g1h, VerifyOption vo) : |
| 390 | 3254 AbstractGangTask("Parallel verify task"), |
|
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|
3255 _g1h(g1h), |
|
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|
3256 _vo(vo), |
|
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|
3257 _failures(false) { } |
|
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|
3258 |
|
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|
3259 bool failures() { |
|
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|
3260 return _failures; |
|
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|
3261 } |
| 390 | 3262 |
|
4728
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|
3263 void work(uint worker_id) { |
|
637
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6817419: G1: Enable extensive verification for humongous regions
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changeset
|
3264 HandleMark hm; |
| 6008 | 3265 VerifyRegionClosure blk(true, _vo); |
|
4728
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|
3266 _g1h->heap_region_par_iterate_chunked(&blk, worker_id, |
|
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|
3267 _g1h->workers()->active_workers(), |
| 390 | 3268 HeapRegion::ParVerifyClaimValue); |
|
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|
3269 if (blk.failures()) { |
|
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|
3270 _failures = true; |
|
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|
3271 } |
| 390 | 3272 } |
| 3273 }; | |
| 3274 | |
| 6008 | 3275 void G1CollectedHeap::verify(bool silent) { |
| 3276 verify(silent, VerifyOption_G1UsePrevMarking); | |
| 3277 } | |
| 3278 | |
| 3279 void G1CollectedHeap::verify(bool silent, | |
|
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|
3280 VerifyOption vo) { |
| 342 | 3281 if (SafepointSynchronize::is_at_safepoint() || ! UseTLAB) { |
|
3293
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|
3282 if (!silent) { gclog_or_tty->print("Roots (excluding permgen) "); } |
|
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|
3283 VerifyRootsClosure rootsCl(vo); |
|
4095
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|
3284 |
|
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|
3285 assert(Thread::current()->is_VM_thread(), |
|
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|
3286 "Expected to be executed serially by the VM thread at this point"); |
|
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|
3287 |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
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diff
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|
3288 CodeBlobToOopClosure blobsCl(&rootsCl, /*do_marking=*/ false); |
|
3772
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|
3289 |
|
3293
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diff
changeset
|
3290 // We apply the relevant closures to all the oops in the |
|
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3289
diff
changeset
|
3291 // 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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diff
changeset
|
3292 const int so = SO_AllClasses | SO_Strings | SO_CodeCache; |
|
3772
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|
3293 |
|
3293
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diff
changeset
|
3294 process_strong_roots(true, // activate StrongRootsScope |
|
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3289
diff
changeset
|
3295 true, // we set "collecting perm gen" to true, |
|
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diff
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|
3296 // so we don't reset the dirty cards in the perm gen. |
|
4910
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|
3297 ScanningOption(so), // roots scanning options |
| 342 | 3298 &rootsCl, |
|
989
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|
3299 &blobsCl, |
| 342 | 3300 &rootsCl); |
|
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|
3301 |
|
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diff
changeset
|
3302 // If we're verifying after the marking phase of a Full GC then we can't |
|
6747fd0512e0
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changeset
|
3303 // treat the perm gen as roots into the G1 heap. Some of the objects in |
|
6747fd0512e0
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changeset
|
3304 // the perm gen may be dead and hence not marked. If one of these dead |
|
6747fd0512e0
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changeset
|
3305 // objects is considered to be a root then we may end up with a false |
|
6747fd0512e0
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changeset
|
3306 // "Root location <x> points to dead ob <y>" failure. |
|
6747fd0512e0
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|
3307 if (vo != VerifyOption_G1UseMarkWord) { |
|
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changeset
|
3308 // Since we used "collecting_perm_gen" == true above, we will not have |
|
6747fd0512e0
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diff
changeset
|
3309 // checked the refs from perm into the G1-collected heap. We check those |
|
6747fd0512e0
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changeset
|
3310 // references explicitly below. Whether the relevant cards are dirty |
|
6747fd0512e0
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|
3311 // is checked further below in the rem set verification. |
|
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changeset
|
3312 if (!silent) { gclog_or_tty->print("Permgen roots "); } |
|
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|
3313 perm_gen()->oop_iterate(&rootsCl); |
|
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|
3314 } |
|
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|
3315 bool failures = rootsCl.failures(); |
|
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|
3316 |
|
6747fd0512e0
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changeset
|
3317 if (vo != VerifyOption_G1UseMarkWord) { |
|
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|
3318 // If we're verifying during a full GC then the region sets |
|
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changeset
|
3319 // will have been torn down at the start of the GC. Therefore |
|
6747fd0512e0
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changeset
|
3320 // verifying the region sets will fail. So we only verify |
|
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changeset
|
3321 // the region sets when not in a full GC. |
|
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diff
changeset
|
3322 if (!silent) { gclog_or_tty->print("HeapRegionSets "); } |
|
6747fd0512e0
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3766
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changeset
|
3323 verify_region_sets(); |
|
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3766
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changeset
|
3324 } |
|
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|
3325 |
| 2152 | 3326 if (!silent) { gclog_or_tty->print("HeapRegions "); } |
| 390 | 3327 if (GCParallelVerificationEnabled && ParallelGCThreads > 1) { |
| 3328 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 3329 "sanity check"); | |
| 3330 | |
| 6008 | 3331 G1ParVerifyTask task(this, vo); |
|
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|
3332 assert(UseDynamicNumberOfGCThreads || |
|
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|
3333 workers()->active_workers() == workers()->total_workers(), |
|
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|
3334 "If not dynamic should be using all the workers"); |
|
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|
3335 int n_workers = workers()->active_workers(); |
| 390 | 3336 set_par_threads(n_workers); |
| 3337 workers()->run_task(&task); | |
| 3338 set_par_threads(0); | |
|
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|
3339 if (task.failures()) { |
|
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|
3340 failures = true; |
|
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|
3341 } |
| 390 | 3342 |
|
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|
3343 // Checks that the expected amount of parallel work was done. |
|
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|
3344 // The implication is that n_workers is > 0. |
| 390 | 3345 assert(check_heap_region_claim_values(HeapRegion::ParVerifyClaimValue), |
| 3346 "sanity check"); | |
| 3347 | |
| 3348 reset_heap_region_claim_values(); | |
| 3349 | |
| 3350 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 3351 "sanity check"); | |
| 3352 } else { | |
| 6008 | 3353 VerifyRegionClosure blk(false, vo); |
| 3766 | 3354 heap_region_iterate(&blk); |
|
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|
3355 if (blk.failures()) { |
|
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|
3356 failures = true; |
|
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|
3357 } |
| 390 | 3358 } |
| 2152 | 3359 if (!silent) gclog_or_tty->print("RemSet "); |
| 342 | 3360 rem_set()->verify(); |
|
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|
3361 |
|
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|
3362 if (failures) { |
|
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|
3363 gclog_or_tty->print_cr("Heap:"); |
|
4073
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4072
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|
3364 // 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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|
3365 // help us track down what went wrong. This is why we call |
|
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|
3366 // print_extended_on() instead of print_on(). |
|
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|
3367 print_extended_on(gclog_or_tty); |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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|
3368 gclog_or_tty->print_cr(""); |
|
1547
fb1a39993f69
6951319: enable solaris builds using Sun Studio 12 update 1
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diff
changeset
|
3369 #ifndef PRODUCT |
| 1044 | 3370 if (VerifyDuringGC && G1VerifyDuringGCPrintReachable) { |
| 1388 | 3371 concurrent_mark()->print_reachable("at-verification-failure", |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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diff
changeset
|
3372 vo, false /* all */); |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
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diff
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|
3373 } |
|
1547
fb1a39993f69
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
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diff
changeset
|
3374 #endif |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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|
3375 gclog_or_tty->flush(); |
|
ff2402f6a50b
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|
3376 } |
|
ff2402f6a50b
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|
3377 guarantee(!failures, "there should not have been any failures"); |
| 342 | 3378 } else { |
| 3379 if (!silent) gclog_or_tty->print("(SKIPPING roots, heapRegions, remset) "); | |
| 3380 } | |
| 3381 } | |
| 3382 | |
| 3383 class PrintRegionClosure: public HeapRegionClosure { | |
| 3384 outputStream* _st; | |
| 3385 public: | |
| 3386 PrintRegionClosure(outputStream* st) : _st(st) {} | |
| 3387 bool doHeapRegion(HeapRegion* r) { | |
| 3388 r->print_on(_st); | |
| 3389 return false; | |
| 3390 } | |
| 3391 }; | |
| 3392 | |
| 3393 void G1CollectedHeap::print_on(outputStream* st) const { | |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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|
3394 st->print(" %-20s", "garbage-first heap"); |
|
0316eac49d5a
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|
3395 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
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|
3396 capacity()/K, used_unlocked()/K); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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|
3397 st->print(" [" INTPTR_FORMAT ", " INTPTR_FORMAT ", " INTPTR_FORMAT ")", |
|
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|
3398 _g1_storage.low_boundary(), |
|
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|
3399 _g1_storage.high(), |
|
0316eac49d5a
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|
3400 _g1_storage.high_boundary()); |
|
0316eac49d5a
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|
3401 st->cr(); |
|
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
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diff
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|
3402 st->print(" region size " SIZE_FORMAT "K, ", HeapRegion::GrainBytes / K); |
|
6010
720b6a76dd9d
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|
3403 uint young_regions = _young_list->length(); |
|
720b6a76dd9d
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|
3404 st->print("%u young (" SIZE_FORMAT "K), ", young_regions, |
|
720b6a76dd9d
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|
3405 (size_t) young_regions * HeapRegion::GrainBytes / K); |
|
720b6a76dd9d
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|
3406 uint survivor_regions = g1_policy()->recorded_survivor_regions(); |
|
720b6a76dd9d
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tonyp
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|
3407 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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|
3408 (size_t) survivor_regions * HeapRegion::GrainBytes / K); |
|
838
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|
3409 st->cr(); |
|
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|
3410 perm()->as_gen()->print_on(st); |
|
4073
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|
3411 } |
|
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|
3412 |
|
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|
3413 void G1CollectedHeap::print_extended_on(outputStream* st) const { |
|
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|
3414 print_on(st); |
|
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|
3415 |
|
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|
3416 // Print the per-region information. |
|
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|
3417 st->cr(); |
|
6010
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|
3418 st->print_cr("Heap Regions: (Y=young(eden), SU=young(survivor), " |
|
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|
3419 "HS=humongous(starts), HC=humongous(continues), " |
|
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|
3420 "CS=collection set, F=free, TS=gc time stamp, " |
|
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|
3421 "PTAMS=previous top-at-mark-start, " |
|
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changeset
|
3422 "NTAMS=next top-at-mark-start)"); |
| 342 | 3423 PrintRegionClosure blk(st); |
| 3766 | 3424 heap_region_iterate(&blk); |
| 342 | 3425 } |
| 3426 | |
| 3427 void G1CollectedHeap::print_gc_threads_on(outputStream* st) const { | |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
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changeset
|
3428 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 1019 | 3429 workers()->print_worker_threads_on(st); |
| 3430 } | |
| 3431 _cmThread->print_on(st); | |
| 342 | 3432 st->cr(); |
| 1019 | 3433 _cm->print_worker_threads_on(st); |
| 3434 _cg1r->print_worker_threads_on(st); | |
| 342 | 3435 st->cr(); |
| 3436 } | |
| 3437 | |
| 3438 void G1CollectedHeap::gc_threads_do(ThreadClosure* tc) const { | |
|
1833
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|
3439 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 342 | 3440 workers()->threads_do(tc); |
| 3441 } | |
| 3442 tc->do_thread(_cmThread); | |
| 794 | 3443 _cg1r->threads_do(tc); |
| 342 | 3444 } |
| 3445 | |
| 3446 void G1CollectedHeap::print_tracing_info() const { | |
| 3447 // We'll overload this to mean "trace GC pause statistics." | |
| 3448 if (TraceGen0Time || TraceGen1Time) { | |
| 3449 // The "G1CollectorPolicy" is keeping track of these stats, so delegate | |
| 3450 // to that. | |
| 3451 g1_policy()->print_tracing_info(); | |
| 3452 } | |
| 751 | 3453 if (G1SummarizeRSetStats) { |
| 342 | 3454 g1_rem_set()->print_summary_info(); |
| 3455 } | |
| 1282 | 3456 if (G1SummarizeConcMark) { |
| 342 | 3457 concurrent_mark()->print_summary_info(); |
| 3458 } | |
| 3459 g1_policy()->print_yg_surv_rate_info(); | |
| 3460 SpecializationStats::print(); | |
| 3461 } | |
| 3462 | |
|
3777
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|
3463 #ifndef PRODUCT |
|
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|
3464 // Helpful for debugging RSet issues. |
|
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|
3465 |
|
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|
3466 class PrintRSetsClosure : public HeapRegionClosure { |
|
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|
3467 private: |
|
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changeset
|
3468 const char* _msg; |
|
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changeset
|
3469 size_t _occupied_sum; |
|
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|
3470 |
|
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changeset
|
3471 public: |
|
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changeset
|
3472 bool doHeapRegion(HeapRegion* r) { |
|
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changeset
|
3473 HeapRegionRemSet* hrrs = r->rem_set(); |
|
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changeset
|
3474 size_t occupied = hrrs->occupied(); |
|
e8b0b0392037
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diff
changeset
|
3475 _occupied_sum += occupied; |
|
e8b0b0392037
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changeset
|
3476 |
|
e8b0b0392037
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changeset
|
3477 gclog_or_tty->print_cr("Printing RSet for region "HR_FORMAT, |
|
e8b0b0392037
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diff
changeset
|
3478 HR_FORMAT_PARAMS(r)); |
|
e8b0b0392037
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tonyp
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diff
changeset
|
3479 if (occupied == 0) { |
|
e8b0b0392037
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parents:
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diff
changeset
|
3480 gclog_or_tty->print_cr(" RSet is empty"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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diff
changeset
|
3481 } else { |
|
e8b0b0392037
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diff
changeset
|
3482 hrrs->print(); |
|
e8b0b0392037
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parents:
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diff
changeset
|
3483 } |
|
e8b0b0392037
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diff
changeset
|
3484 gclog_or_tty->print_cr("----------"); |
|
e8b0b0392037
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diff
changeset
|
3485 return false; |
|
e8b0b0392037
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parents:
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diff
changeset
|
3486 } |
|
e8b0b0392037
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tonyp
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diff
changeset
|
3487 |
|
e8b0b0392037
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diff
changeset
|
3488 PrintRSetsClosure(const char* msg) : _msg(msg), _occupied_sum(0) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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diff
changeset
|
3489 gclog_or_tty->cr(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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diff
changeset
|
3490 gclog_or_tty->print_cr("========================================"); |
|
e8b0b0392037
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changeset
|
3491 gclog_or_tty->print_cr(msg); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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diff
changeset
|
3492 gclog_or_tty->cr(); |
|
e8b0b0392037
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diff
changeset
|
3493 } |
|
e8b0b0392037
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diff
changeset
|
3494 |
|
e8b0b0392037
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diff
changeset
|
3495 ~PrintRSetsClosure() { |
|
e8b0b0392037
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diff
changeset
|
3496 gclog_or_tty->print_cr("Occupied Sum: "SIZE_FORMAT, _occupied_sum); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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diff
changeset
|
3497 gclog_or_tty->print_cr("========================================"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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3774
diff
changeset
|
3498 gclog_or_tty->cr(); |
|
e8b0b0392037
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diff
changeset
|
3499 } |
|
e8b0b0392037
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diff
changeset
|
3500 }; |
|
e8b0b0392037
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changeset
|
3501 |
|
e8b0b0392037
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changeset
|
3502 void G1CollectedHeap::print_cset_rsets() { |
|
e8b0b0392037
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diff
changeset
|
3503 PrintRSetsClosure cl("Printing CSet RSets"); |
|
e8b0b0392037
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tonyp
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diff
changeset
|
3504 collection_set_iterate(&cl); |
|
e8b0b0392037
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changeset
|
3505 } |
|
e8b0b0392037
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|
3506 |
|
e8b0b0392037
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|
3507 void G1CollectedHeap::print_all_rsets() { |
|
e8b0b0392037
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diff
changeset
|
3508 PrintRSetsClosure cl("Printing All RSets");; |
|
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diff
changeset
|
3509 heap_region_iterate(&cl); |
|
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changeset
|
3510 } |
|
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|
3511 #endif // PRODUCT |
|
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|
3512 |
| 342 | 3513 G1CollectedHeap* G1CollectedHeap::heap() { |
| 3514 assert(_sh->kind() == CollectedHeap::G1CollectedHeap, | |
| 3515 "not a garbage-first heap"); | |
| 3516 return _g1h; | |
| 3517 } | |
| 3518 | |
| 3519 void G1CollectedHeap::gc_prologue(bool full /* Ignored */) { | |
|
1245
6484c4ee11cb
6904516: More object array barrier fixes, following up on 6906727
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1166
diff
changeset
|
3520 // always_do_update_barrier = false; |
| 342 | 3521 assert(InlineCacheBuffer::is_empty(), "should have cleaned up ICBuffer"); |
| 3522 // Call allocation profiler | |
| 3523 AllocationProfiler::iterate_since_last_gc(); | |
| 3524 // Fill TLAB's and such | |
| 3525 ensure_parsability(true); | |
| 3526 } | |
| 3527 | |
| 3528 void G1CollectedHeap::gc_epilogue(bool full /* Ignored */) { | |
| 3529 // FIXME: what is this about? | |
| 3530 // I'm ignoring the "fill_newgen()" call if "alloc_event_enabled" | |
| 3531 // is set. | |
| 3532 COMPILER2_PRESENT(assert(DerivedPointerTable::is_empty(), | |
| 3533 "derived pointer present")); | |
|
1245
6484c4ee11cb
6904516: More object array barrier fixes, following up on 6906727
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diff
changeset
|
3534 // always_do_update_barrier = true; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3535 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
3536 // We have just completed a GC. Update the soft reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3537 // policy with the new heap occupancy |
|
4dfb2df418f2
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diff
changeset
|
3538 Universe::update_heap_info_at_gc(); |
| 342 | 3539 } |
| 3540 | |
| 1973 | 3541 HeapWord* G1CollectedHeap::do_collection_pause(size_t word_size, |
| 3542 unsigned int gc_count_before, | |
| 3543 bool* succeeded) { | |
| 3544 assert_heap_not_locked_and_not_at_safepoint(); | |
| 342 | 3545 g1_policy()->record_stop_world_start(); |
| 1973 | 3546 VM_G1IncCollectionPause op(gc_count_before, |
| 3547 word_size, | |
| 3548 false, /* should_initiate_conc_mark */ | |
| 3549 g1_policy()->max_pause_time_ms(), | |
| 3550 GCCause::_g1_inc_collection_pause); | |
| 3551 VMThread::execute(&op); | |
| 3552 | |
| 3553 HeapWord* result = op.result(); | |
| 3554 bool ret_succeeded = op.prologue_succeeded() && op.pause_succeeded(); | |
| 3555 assert(result == NULL || ret_succeeded, | |
| 3556 "the result should be NULL if the VM did not succeed"); | |
| 3557 *succeeded = ret_succeeded; | |
| 3558 | |
| 3559 assert_heap_not_locked(); | |
| 3560 return result; | |
| 342 | 3561 } |
| 3562 | |
| 3563 void | |
| 3564 G1CollectedHeap::doConcurrentMark() { | |
|
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|
3565 MutexLockerEx x(CGC_lock, Mutex::_no_safepoint_check_flag); |
|
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|
3566 if (!_cmThread->in_progress()) { |
|
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|
3567 _cmThread->set_started(); |
|
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diff
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|
3568 CGC_lock->notify(); |
| 342 | 3569 } |
| 3570 } | |
| 3571 | |
| 3572 size_t G1CollectedHeap::pending_card_num() { | |
| 3573 size_t extra_cards = 0; | |
| 3574 JavaThread *curr = Threads::first(); | |
| 3575 while (curr != NULL) { | |
| 3576 DirtyCardQueue& dcq = curr->dirty_card_queue(); | |
| 3577 extra_cards += dcq.size(); | |
| 3578 curr = curr->next(); | |
| 3579 } | |
| 3580 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
| 3581 size_t buffer_size = dcqs.buffer_size(); | |
| 3582 size_t buffer_num = dcqs.completed_buffers_num(); | |
| 3583 return buffer_size * buffer_num + extra_cards; | |
| 3584 } | |
| 3585 | |
| 3586 size_t G1CollectedHeap::max_pending_card_num() { | |
| 3587 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
| 3588 size_t buffer_size = dcqs.buffer_size(); | |
| 3589 size_t buffer_num = dcqs.completed_buffers_num(); | |
| 3590 int thread_num = Threads::number_of_threads(); | |
| 3591 return (buffer_num + thread_num) * buffer_size; | |
| 3592 } | |
| 3593 | |
| 3594 size_t G1CollectedHeap::cards_scanned() { | |
| 1861 | 3595 return g1_rem_set()->cardsScanned(); |
| 342 | 3596 } |
| 3597 | |
| 3598 void | |
| 3599 G1CollectedHeap::setup_surviving_young_words() { | |
|
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|
3600 assert(_surviving_young_words == NULL, "pre-condition"); |
|
720b6a76dd9d
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changeset
|
3601 uint array_length = g1_policy()->young_cset_region_length(); |
| 6197 | 3602 _surviving_young_words = NEW_C_HEAP_ARRAY(size_t, (size_t) array_length, mtGC); |
| 342 | 3603 if (_surviving_young_words == NULL) { |
| 3604 vm_exit_out_of_memory(sizeof(size_t) * array_length, | |
| 3605 "Not enough space for young surv words summary."); | |
| 3606 } | |
|
6010
720b6a76dd9d
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diff
changeset
|
3607 memset(_surviving_young_words, 0, (size_t) array_length * sizeof(size_t)); |
|
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|
3608 #ifdef ASSERT |
|
6010
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7157073: G1: type change size_t -> uint for region counts / indexes
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changeset
|
3609 for (uint i = 0; i < array_length; ++i) { |
|
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|
3610 assert( _surviving_young_words[i] == 0, "memset above" ); |
|
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|
3611 } |
|
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diff
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|
3612 #endif // !ASSERT |
| 342 | 3613 } |
| 3614 | |
| 3615 void | |
| 3616 G1CollectedHeap::update_surviving_young_words(size_t* surv_young_words) { | |
| 3617 MutexLockerEx x(ParGCRareEvent_lock, Mutex::_no_safepoint_check_flag); | |
|
6010
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diff
changeset
|
3618 uint array_length = g1_policy()->young_cset_region_length(); |
|
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changeset
|
3619 for (uint i = 0; i < array_length; ++i) { |
| 342 | 3620 _surviving_young_words[i] += surv_young_words[i]; |
|
6010
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diff
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|
3621 } |
| 342 | 3622 } |
| 3623 | |
| 3624 void | |
| 3625 G1CollectedHeap::cleanup_surviving_young_words() { | |
| 3626 guarantee( _surviving_young_words != NULL, "pre-condition" ); | |
| 6197 | 3627 FREE_C_HEAP_ARRAY(size_t, _surviving_young_words, mtGC); |
| 342 | 3628 _surviving_young_words = NULL; |
| 3629 } | |
| 3630 | |
|
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7046182: G1: remove unnecessary iterations over the collection set
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|
3631 #ifdef ASSERT |
|
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|
3632 class VerifyCSetClosure: public HeapRegionClosure { |
|
e8b0b0392037
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changeset
|
3633 public: |
|
e8b0b0392037
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diff
changeset
|
3634 bool doHeapRegion(HeapRegion* hr) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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parents:
3774
diff
changeset
|
3635 // Here we check that the CSet region's RSet is ready for parallel |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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parents:
3774
diff
changeset
|
3636 // iteration. The fields that we'll verify are only manipulated |
|
e8b0b0392037
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parents:
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diff
changeset
|
3637 // when the region is part of a CSet and is collected. Afterwards, |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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parents:
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diff
changeset
|
3638 // we reset these fields when we clear the region's RSet (when the |
|
e8b0b0392037
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diff
changeset
|
3639 // region is freed) so they are ready when the region is |
|
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diff
changeset
|
3640 // re-allocated. The only exception to this is if there's an |
|
e8b0b0392037
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diff
changeset
|
3641 // evacuation failure and instead of freeing the region we leave |
|
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diff
changeset
|
3642 // it in the heap. In that case, we reset these fields during |
|
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diff
changeset
|
3643 // evacuation failure handling. |
|
e8b0b0392037
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parents:
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diff
changeset
|
3644 guarantee(hr->rem_set()->verify_ready_for_par_iteration(), "verification"); |
|
e8b0b0392037
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tonyp
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changeset
|
3645 |
|
e8b0b0392037
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diff
changeset
|
3646 // Here's a good place to add any other checks we'd like to |
|
e8b0b0392037
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parents:
3774
diff
changeset
|
3647 // perform on CSet regions. |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3648 return false; |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3649 } |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3650 }; |
|
3777
e8b0b0392037
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tonyp
parents:
3774
diff
changeset
|
3651 #endif // ASSERT |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3652 |
| 1709 | 3653 #if TASKQUEUE_STATS |
| 3654 void G1CollectedHeap::print_taskqueue_stats_hdr(outputStream* const st) { | |
| 3655 st->print_raw_cr("GC Task Stats"); | |
| 3656 st->print_raw("thr "); TaskQueueStats::print_header(1, st); st->cr(); | |
| 3657 st->print_raw("--- "); TaskQueueStats::print_header(2, st); st->cr(); | |
| 3658 } | |
| 3659 | |
| 3660 void G1CollectedHeap::print_taskqueue_stats(outputStream* const st) const { | |
| 3661 print_taskqueue_stats_hdr(st); | |
| 3662 | |
| 3663 TaskQueueStats totals; | |
|
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3664 const int n = workers() != NULL ? workers()->total_workers() : 1; |
| 1709 | 3665 for (int i = 0; i < n; ++i) { |
| 3666 st->print("%3d ", i); task_queue(i)->stats.print(st); st->cr(); | |
| 3667 totals += task_queue(i)->stats; | |
| 3668 } | |
| 3669 st->print_raw("tot "); totals.print(st); st->cr(); | |
| 3670 | |
| 3671 DEBUG_ONLY(totals.verify()); | |
| 3672 } | |
| 3673 | |
| 3674 void G1CollectedHeap::reset_taskqueue_stats() { | |
|
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3675 const int n = workers() != NULL ? workers()->total_workers() : 1; |
| 1709 | 3676 for (int i = 0; i < n; ++i) { |
| 3677 task_queue(i)->stats.reset(); | |
| 3678 } | |
| 3679 } | |
| 3680 #endif // TASKQUEUE_STATS | |
| 3681 | |
| 1973 | 3682 bool |
|
1656
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6944166: G1: explicit GCs are not always handled correctly
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1611
diff
changeset
|
3683 G1CollectedHeap::do_collection_pause_at_safepoint(double target_pause_time_ms) { |
| 2152 | 3684 assert_at_safepoint(true /* should_be_vm_thread */); |
| 3685 guarantee(!is_gc_active(), "collection is not reentrant"); | |
| 3686 | |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3687 if (GC_locker::check_active_before_gc()) { |
| 1973 | 3688 return false; |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3689 } |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
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1313
diff
changeset
|
3690 |
|
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2039
diff
changeset
|
3691 SvcGCMarker sgcm(SvcGCMarker::MINOR); |
|
2039
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3692 ResourceMark rm; |
|
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3693 |
|
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4787
diff
changeset
|
3694 print_heap_before_gc(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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811
diff
changeset
|
3695 |
| 4072 | 3696 HRSPhaseSetter x(HRSPhaseEvacuation); |
| 2152 | 3697 verify_region_sets_optional(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3698 verify_dirty_young_regions(); |
| 2152 | 3699 |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3700 // 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
|
3701 // 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
|
3702 // for the duration of this pause. |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3703 g1_policy()->decide_on_conc_mark_initiation(); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3704 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3705 // 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
|
3706 assert(!g1_policy()->during_initial_mark_pause() || |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3707 g1_policy()->gcs_are_young(), "sanity"); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3708 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3709 // 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
|
3710 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
|
3711 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3712 // 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
|
3713 // 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
|
3714 // 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
|
3715 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
|
3716 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3717 // 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
|
3718 { |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3719 if (g1_policy()->during_initial_mark_pause()) { |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3720 // 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
|
3721 // full collection counter. |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
3722 increment_old_marking_cycles_started(); |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3723 } |
|
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
3724 // if the log level is "finer" is on, we'll print long statistics information |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3725 // in the collector policy code, so let's not print this as the output |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3726 // is messy if we do. |
|
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
3727 gclog_or_tty->date_stamp(G1Log::fine() && PrintGCDateStamps); |
|
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
3728 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
| 6030 | 3729 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3730 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
|
3731 workers()->active_workers() : 1); |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3732 g1_policy()->phase_times()->note_gc_start(os::elapsedTime(), active_workers, |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3733 g1_policy()->gcs_are_young(), g1_policy()->during_initial_mark_pause(), gc_cause()); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3734 |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
3735 TraceCollectorStats tcs(g1mm()->incremental_collection_counters()); |
|
3356
78542e2b5e35
7036199: Adding a notification to the implementation of GarbageCollectorMXBeans
fparain
parents:
3323
diff
changeset
|
3736 TraceMemoryManagerStats tms(false /* fullGC */, gc_cause()); |
|
1089
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
tonyp
parents:
1088
diff
changeset
|
3737 |
| 2361 | 3738 // If the secondary_free_list is not empty, append it to the |
| 3739 // free_list. No need to wait for the cleanup operation to finish; | |
| 3740 // the region allocation code will check the secondary_free_list | |
| 3741 // and wait if necessary. If the G1StressConcRegionFreeing flag is | |
| 3742 // set, skip this step so that the region allocation code has to | |
| 3743 // get entries from the secondary_free_list. | |
| 2152 | 3744 if (!G1StressConcRegionFreeing) { |
| 2361 | 3745 append_secondary_free_list_if_not_empty_with_lock(); |
| 2152 | 3746 } |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3747 |
|
3867
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
3748 assert(check_young_list_well_formed(), |
|
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
3749 "young list should be well formed"); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3750 |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3751 // 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
|
3752 // 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
|
3753 // it will be set. |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3754 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3755 { // 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
|
3756 IsGCActiveMark x; |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3757 |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3758 gc_prologue(false); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3759 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
|
3760 increment_gc_time_stamp(); |
| 342 | 3761 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3762 if (VerifyBeforeGC && total_collections() >= VerifyGCStartAt) { |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3763 HandleMark hm; // Discard invalid handles created during verification |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3764 gclog_or_tty->print(" VerifyBeforeGC:"); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3765 prepare_for_verify(); |
| 6008 | 3766 Universe::verify(/* silent */ false, |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3767 /* option */ VerifyOption_G1UsePrevMarking); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3768 } |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3769 |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3770 COMPILER2_PRESENT(DerivedPointerTable::clear()); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3771 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3772 // Please see comment in g1CollectedHeap.hpp and |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3773 // G1CollectedHeap::ref_processing_init() to see how |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3774 // reference processing currently works in G1. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3775 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3776 // Enable discovery in the STW reference processor |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3777 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3778 true /*verify_no_refs*/); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3779 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3780 { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3781 // We want to temporarily turn off discovery by the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3782 // CM ref processor, if necessary, and turn it back on |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3783 // on again later if we do. Using a scoped |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3784 // NoRefDiscovery object will do this. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3785 NoRefDiscovery no_cm_discovery(ref_processor_cm()); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3786 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3787 // 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
|
3788 // of the collection set!). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3789 release_mutator_alloc_region(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3790 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3791 // We should call this after we retire the mutator alloc |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3792 // region(s) so that all the ALLOC / RETIRE events are generated |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3793 // before the start GC event. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3794 _hr_printer.start_gc(false /* full */, (size_t) total_collections()); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3795 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3796 // 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
|
3797 // 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
|
3798 // 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
|
3799 // |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3800 // 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
|
3801 // |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3802 // The elapsed time induced by the start time below deliberately elides |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3803 // 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
|
3804 double sample_start_time_sec = os::elapsedTime(); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3805 size_t start_used_bytes = used(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3806 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3807 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3808 gclog_or_tty->print_cr("\nBefore recording pause start.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3809 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3810 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
|
3811 #endif // YOUNG_LIST_VERBOSE |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3812 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3813 g1_policy()->record_collection_pause_start(sample_start_time_sec, |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3814 start_used_bytes); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3815 |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3816 double scan_wait_start = os::elapsedTime(); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3817 // 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
|
3818 // 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
|
3819 // 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
|
3820 // moving them during the GC. |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3821 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
|
3822 double wait_time_ms = 0.0; |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3823 if (waited) { |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3824 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
|
3825 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
|
3826 } |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3827 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
|
3828 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3829 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3830 gclog_or_tty->print_cr("\nAfter recording pause start.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3831 _young_list->print(); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3832 #endif // YOUNG_LIST_VERBOSE |
| 342 | 3833 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3834 if (g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3835 concurrent_mark()->checkpointRootsInitialPre(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3836 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3837 perm_gen()->save_marks(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
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 choosing collection set.\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 |
|
4912
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4910
diff
changeset
|
3845 g1_policy()->finalize_cset(target_pause_time_ms); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3846 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3847 _cm->note_start_of_gc(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3848 // 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
|
3849 // 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
|
3850 // 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
|
3851 // ensure that the CSet has been finalized. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3852 _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
|
3853 true /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3854 false /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3855 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3856 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3857 if (_hr_printer.is_active()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3858 HeapRegion* hr = g1_policy()->collection_set(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3859 while (hr != NULL) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3860 G1HRPrinter::RegionType type; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3861 if (!hr->is_young()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3862 type = G1HRPrinter::Old; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3863 } else if (hr->is_survivor()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3864 type = G1HRPrinter::Survivor; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3865 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3866 type = G1HRPrinter::Eden; |
|
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 _hr_printer.cset(hr); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3869 hr = hr->next_in_collection_set(); |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
3870 } |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
3871 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3872 |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3873 #ifdef ASSERT |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3874 VerifyCSetClosure cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3875 collection_set_iterate(&cl); |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3876 #endif // ASSERT |
| 1707 | 3877 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3878 setup_surviving_young_words(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3879 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3880 // Initialize the GC alloc regions. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3881 init_gc_alloc_regions(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3882 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3883 // Actually do the work... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3884 evacuate_collection_set(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3885 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3886 // 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
|
3887 // (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
|
3888 // 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
|
3889 // 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
|
3890 // we checked. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3891 _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
|
3892 false /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3893 true /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3894 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3895 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3896 free_collection_set(g1_policy()->collection_set()); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3897 g1_policy()->clear_collection_set(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3898 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3899 cleanup_surviving_young_words(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3900 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3901 // Start a new incremental collection set for the next pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3902 g1_policy()->start_incremental_cset_building(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3903 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3904 // Clear the _cset_fast_test bitmap in anticipation of adding |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3905 // regions to the incremental collection set for the next |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3906 // evacuation pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3907 clear_cset_fast_test(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3908 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3909 _young_list->reset_sampled_info(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3910 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3911 // Don't check the whole heap at this point as the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3912 // GC alloc regions from this pause have been tagged |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3913 // as survivors and moved on to the survivor list. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3914 // Survivor regions will fail the !is_young() check. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3915 assert(check_young_list_empty(false /* check_heap */), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3916 "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
|
3917 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3918 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3919 gclog_or_tty->print_cr("Before recording survivors.\nYoung List:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3920 _young_list->print(); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3921 #endif // YOUNG_LIST_VERBOSE |
| 342 | 3922 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3923 g1_policy()->record_survivor_regions(_young_list->survivor_length(), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3924 _young_list->first_survivor_region(), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3925 _young_list->last_survivor_region()); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3926 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3927 _young_list->reset_auxilary_lists(); |
|
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 if (evacuation_failed()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3930 _summary_bytes_used = recalculate_used(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3931 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3932 // The "used" of the the collection set have already been subtracted |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3933 // when they were freed. Add in the bytes evacuated. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3934 _summary_bytes_used += g1_policy()->bytes_copied_during_gc(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3935 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3936 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3937 if (g1_policy()->during_initial_mark_pause()) { |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3938 // 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
|
3939 // 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
|
3940 // appropriate initialization is done on the CM object. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3941 concurrent_mark()->checkpointRootsInitialPost(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3942 set_marking_started(); |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3943 // 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
|
3944 // 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
|
3945 // the current thread has completed its logging output. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3946 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3947 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3948 allocate_dummy_regions(); |
|
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
3949 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3950 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3951 gclog_or_tty->print_cr("\nEnd of the pause.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3952 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3953 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
|
3954 #endif // YOUNG_LIST_VERBOSE |
| 342 | 3955 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3956 init_mutator_alloc_region(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3957 |
|
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 size_t expand_bytes = g1_policy()->expansion_amount(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3960 if (expand_bytes > 0) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3961 size_t bytes_before = capacity(); |
| 4785 | 3962 // No need for an ergo verbose message here, |
| 3963 // expansion_amount() does this when it returns a value > 0. | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3964 if (!expand(expand_bytes)) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3965 // We failed to expand the heap so let's verify that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3966 // committed/uncommitted amount match the backing store |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3967 assert(capacity() == _g1_storage.committed_size(), "committed size mismatch"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3968 assert(max_capacity() == _g1_storage.reserved_size(), "reserved size mismatch"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3969 } |
|
3920
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
3970 } |
|
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
3971 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3972 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3973 // 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
|
3974 // 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
|
3975 _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
|
3976 true /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3977 true /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3978 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3979 _cm->note_end_of_gc(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3980 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3981 // Collect thread local data to allow the ergonomics to use |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3982 // the collected information |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3983 g1_policy()->phase_times()->collapse_par_times(); |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3984 |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3985 // 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
|
3986 // 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
|
3987 // 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
|
3988 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
|
3989 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
|
3990 g1_policy()->record_collection_pause_end(pause_time_ms); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3991 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3992 MemoryService::track_memory_usage(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3993 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3994 // 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
|
3995 // update buffers to bring the RSets up-to-date if |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3996 // G1HRRSFlushLogBuffersOnVerify has been set. While scanning |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3997 // 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
|
3998 // regions we just allocated to (i.e., the GC alloc |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3999 // regions). However, during the last GC we called |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4000 // set_saved_mark() on all the GC alloc regions, so card |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4001 // scanning might skip the [saved_mark_word()...top()] area of |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4002 // those regions (i.e., the area we allocated objects into |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4003 // during the last GC). But it shouldn't. Given that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4004 // saved_mark_word() is conditional on whether the GC time stamp |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4005 // 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
|
4006 // 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
|
4007 // regions and saved_mark_word() will simply return top() for |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4008 // 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
|
4009 // than iterating over the regions and fixing them. In fact, the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4010 // GC time stamp increment here also ensures that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4011 // saved_mark_word() will return top() between pauses, i.e., |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4012 // during concurrent refinement. So we don't need the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4013 // is_gc_active() check to decided which top to use when |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4014 // scanning cards (see CR 7039627). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4015 increment_gc_time_stamp(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4016 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4017 if (VerifyAfterGC && total_collections() >= VerifyGCStartAt) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4018 HandleMark hm; // Discard invalid handles created during verification |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4019 gclog_or_tty->print(" VerifyAfterGC:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4020 prepare_for_verify(); |
| 6008 | 4021 Universe::verify(/* silent */ false, |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4022 /* option */ VerifyOption_G1UsePrevMarking); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4023 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4024 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4025 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4026 ref_processor_stw()->verify_no_references_recorded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4027 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4028 // 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
|
4029 } |
|
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4030 |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4031 // 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
|
4032 // 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
|
4033 // 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
|
4034 // RETIRE events are generated before the end GC event. |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4035 _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
|
4036 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4037 if (mark_in_progress()) { |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4038 concurrent_mark()->update_g1_committed(); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4039 } |
|
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4040 |
|
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4041 #ifdef TRACESPINNING |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4042 ParallelTaskTerminator::print_termination_counts(); |
|
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4043 #endif |
| 342 | 4044 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4045 gc_epilogue(false); |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4046 |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4047 g1_policy()->phase_times()->note_gc_end(os::elapsedTime()); |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4048 |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4049 // We have to do this after we decide whether to expand the heap or not. |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4050 g1_policy()->print_heap_transition(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4051 } |
|
6121
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4052 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4053 // 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
|
4054 // 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
|
4055 // 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
|
4056 // logging output either. |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4057 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4058 _hrs.verify_optional(); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4059 verify_region_sets_optional(); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4060 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4061 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
|
4062 TASKQUEUE_STATS_ONLY(reset_taskqueue_stats()); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4063 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4064 print_heap_after_gc(); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4065 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4066 // 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
|
4067 // 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
|
4068 // 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
|
4069 // before any GC notifications are raised. |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4070 g1mm()->update_sizes(); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4071 } |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
4072 |
|
884
83b687ce3090
6866591: G1: print update buffer processing stats more often
tonyp
parents:
883
diff
changeset
|
4073 if (G1SummarizeRSetStats && |
|
83b687ce3090
6866591: G1: print update buffer processing stats more often
tonyp
parents:
883
diff
changeset
|
4074 (G1SummarizeRSetStatsPeriod > 0) && |
|
83b687ce3090
6866591: G1: print update buffer processing stats more often
tonyp
parents:
883
diff
changeset
|
4075 (total_collections() % G1SummarizeRSetStatsPeriod == 0)) { |
|
83b687ce3090
6866591: G1: print update buffer processing stats more often
tonyp
parents:
883
diff
changeset
|
4076 g1_rem_set()->print_summary_info(); |
|
83b687ce3090
6866591: G1: print update buffer processing stats more often
tonyp
parents:
883
diff
changeset
|
4077 } |
| 1973 | 4078 |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4079 // 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
|
4080 // 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
|
4081 // that came from the pause. |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4082 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4083 if (should_start_conc_mark) { |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4084 // CAUTION: after the doConcurrentMark() call below, |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4085 // the concurrent marking thread(s) could be running |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4086 // concurrently with us. Make sure that anything after |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4087 // 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
|
4088 // 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
|
4089 // 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
|
4090 // ConcurrentGCThread::safepoint_desynchronize(). |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4091 doConcurrentMark(); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4092 } |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4093 |
| 1973 | 4094 return true; |
| 342 | 4095 } |
| 4096 | |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4097 size_t G1CollectedHeap::desired_plab_sz(GCAllocPurpose purpose) |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4098 { |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4099 size_t gclab_word_size; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4100 switch (purpose) { |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4101 case GCAllocForSurvived: |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4102 gclab_word_size = YoungPLABSize; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4103 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4104 case GCAllocForTenured: |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4105 gclab_word_size = OldPLABSize; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4106 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4107 default: |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4108 assert(false, "unknown GCAllocPurpose"); |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4109 gclab_word_size = OldPLABSize; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4110 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4111 } |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4112 return gclab_word_size; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4113 } |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4114 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4115 void G1CollectedHeap::init_mutator_alloc_region() { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4116 assert(_mutator_alloc_region.get() == NULL, "pre-condition"); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4117 _mutator_alloc_region.init(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4118 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4119 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4120 void G1CollectedHeap::release_mutator_alloc_region() { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4121 _mutator_alloc_region.release(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4122 assert(_mutator_alloc_region.get() == NULL, "post-condition"); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4123 } |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4124 |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4125 void G1CollectedHeap::init_gc_alloc_regions() { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4126 assert_at_safepoint(true /* should_be_vm_thread */); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4127 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4128 _survivor_gc_alloc_region.init(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4129 _old_gc_alloc_region.init(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
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diff
changeset
|
4130 HeapRegion* retained_region = _retained_old_gc_alloc_region; |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4131 _retained_old_gc_alloc_region = NULL; |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4132 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4133 // We will discard the current GC alloc region if: |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4134 // a) it's in the collection set (it can happen!), |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4135 // b) it's already full (no point in using it), |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4136 // c) it's empty (this means that it was emptied during |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4137 // a cleanup and it should be on the free list now), or |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4138 // d) it's humongous (this means that it was emptied |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4139 // during a cleanup and was added to the free list, but |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4140 // has been subseqently used to allocate a humongous |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4141 // object that may be less than the region size). |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4142 if (retained_region != NULL && |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4143 !retained_region->in_collection_set() && |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4144 !(retained_region->top() == retained_region->end()) && |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4145 !retained_region->is_empty() && |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4146 !retained_region->isHumongous()) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4147 retained_region->set_saved_mark(); |
| 4072 | 4148 // The retained region was added to the old region set when it was |
| 4149 // retired. We have to remove it now, since we don't allow regions | |
| 4150 // we allocate to in the region sets. We'll re-add it later, when | |
| 4151 // it's retired again. | |
| 4152 _old_set.remove(retained_region); | |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4153 bool during_im = g1_policy()->during_initial_mark_pause(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4154 retained_region->note_start_of_copying(during_im); |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4155 _old_gc_alloc_region.set(retained_region); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4156 _hr_printer.reuse(retained_region); |
| 342 | 4157 } |
| 4158 } | |
| 4159 | |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4160 void G1CollectedHeap::release_gc_alloc_regions() { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4161 _survivor_gc_alloc_region.release(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4162 // If we have an old GC alloc region to release, we'll save it in |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4163 // _retained_old_gc_alloc_region. If we don't |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4164 // _retained_old_gc_alloc_region will become NULL. This is what we |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4165 // want either way so no reason to check explicitly for either |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4166 // condition. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4167 _retained_old_gc_alloc_region = _old_gc_alloc_region.release(); |
| 342 | 4168 } |
| 4169 | |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4170 void G1CollectedHeap::abandon_gc_alloc_regions() { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4171 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
|
4172 assert(_old_gc_alloc_region.get() == NULL, "pre-condition"); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4173 _retained_old_gc_alloc_region = NULL; |
| 342 | 4174 } |
| 4175 | |
| 4176 void G1CollectedHeap::init_for_evac_failure(OopsInHeapRegionClosure* cl) { | |
| 4177 _drain_in_progress = false; | |
| 4178 set_evac_failure_closure(cl); | |
| 6197 | 4179 _evac_failure_scan_stack = new (ResourceObj::C_HEAP, mtGC) GrowableArray<oop>(40, true); |
| 342 | 4180 } |
| 4181 | |
| 4182 void G1CollectedHeap::finalize_for_evac_failure() { | |
| 4183 assert(_evac_failure_scan_stack != NULL && | |
| 4184 _evac_failure_scan_stack->length() == 0, | |
| 4185 "Postcondition"); | |
| 4186 assert(!_drain_in_progress, "Postcondition"); | |
| 1045 | 4187 delete _evac_failure_scan_stack; |
| 342 | 4188 _evac_failure_scan_stack = NULL; |
| 4189 } | |
| 4190 | |
| 4191 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
|
4192 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
|
4193 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4194 G1ParRemoveSelfForwardPtrsTask rsfp_task(this); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4195 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4196 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4197 set_par_threads(); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4198 workers()->run_task(&rsfp_task); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4199 set_par_threads(0); |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
4200 } else { |
|
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4201 rsfp_task.work(0); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4202 } |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4203 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4204 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
|
4205 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4206 // 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
|
4207 reset_cset_heap_region_claim_values(); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4208 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4209 assert(check_cset_heap_region_claim_values(HeapRegion::InitialClaimValue), "sanity"); |
| 342 | 4210 |
| 4211 // Now restore saved marks, if any. | |
| 4212 if (_objs_with_preserved_marks != NULL) { | |
| 4213 assert(_preserved_marks_of_objs != NULL, "Both or none."); | |
| 4214 guarantee(_objs_with_preserved_marks->length() == | |
| 4215 _preserved_marks_of_objs->length(), "Both or none."); | |
| 4216 for (int i = 0; i < _objs_with_preserved_marks->length(); i++) { | |
| 4217 oop obj = _objs_with_preserved_marks->at(i); | |
| 4218 markOop m = _preserved_marks_of_objs->at(i); | |
| 4219 obj->set_mark(m); | |
| 4220 } | |
|
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4221 |
| 342 | 4222 // Delete the preserved marks growable arrays (allocated on the C heap). |
| 4223 delete _objs_with_preserved_marks; | |
| 4224 delete _preserved_marks_of_objs; | |
| 4225 _objs_with_preserved_marks = NULL; | |
| 4226 _preserved_marks_of_objs = NULL; | |
| 4227 } | |
| 4228 } | |
| 4229 | |
| 4230 void G1CollectedHeap::push_on_evac_failure_scan_stack(oop obj) { | |
| 4231 _evac_failure_scan_stack->push(obj); | |
| 4232 } | |
| 4233 | |
| 4234 void G1CollectedHeap::drain_evac_failure_scan_stack() { | |
| 4235 assert(_evac_failure_scan_stack != NULL, "precondition"); | |
| 4236 | |
| 4237 while (_evac_failure_scan_stack->length() > 0) { | |
| 4238 oop obj = _evac_failure_scan_stack->pop(); | |
| 4239 _evac_failure_closure->set_region(heap_region_containing(obj)); | |
| 4240 obj->oop_iterate_backwards(_evac_failure_closure); | |
| 4241 } | |
| 4242 } | |
| 4243 | |
| 4244 oop | |
| 4245 G1CollectedHeap::handle_evacuation_failure_par(OopsInHeapRegionClosure* cl, | |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4246 oop old) { |
|
3323
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
3317
diff
changeset
|
4247 assert(obj_in_cs(old), |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
3317
diff
changeset
|
4248 err_msg("obj: "PTR_FORMAT" should still be in the CSet", |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
3317
diff
changeset
|
4249 (HeapWord*) old)); |
| 342 | 4250 markOop m = old->mark(); |
| 4251 oop forward_ptr = old->forward_to_atomic(old); | |
| 4252 if (forward_ptr == NULL) { | |
| 4253 // 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
|
4254 |
| 342 | 4255 if (_evac_failure_closure != cl) { |
| 4256 MutexLockerEx x(EvacFailureStack_lock, Mutex::_no_safepoint_check_flag); | |
| 4257 assert(!_drain_in_progress, | |
| 4258 "Should only be true while someone holds the lock."); | |
| 4259 // Set the global evac-failure closure to the current thread's. | |
| 4260 assert(_evac_failure_closure == NULL, "Or locking has failed."); | |
| 4261 set_evac_failure_closure(cl); | |
| 4262 // Now do the common part. | |
| 4263 handle_evacuation_failure_common(old, m); | |
| 4264 // Reset to NULL. | |
| 4265 set_evac_failure_closure(NULL); | |
| 4266 } else { | |
| 4267 // The lock is already held, and this is recursive. | |
| 4268 assert(_drain_in_progress, "This should only be the recursive case."); | |
| 4269 handle_evacuation_failure_common(old, m); | |
| 4270 } | |
| 4271 return old; | |
| 4272 } else { | |
|
3323
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
3317
diff
changeset
|
4273 // Forward-to-self failed. Either someone else managed to allocate |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
3317
diff
changeset
|
4274 // space for this object (old != forward_ptr) or they beat us in |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
3317
diff
changeset
|
4275 // self-forwarding it (old == forward_ptr). |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
3317
diff
changeset
|
4276 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
|
4277 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
|
4278 "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
|
4279 (HeapWord*) old, (HeapWord*) forward_ptr)); |
| 342 | 4280 return forward_ptr; |
| 4281 } | |
| 4282 } | |
| 4283 | |
| 4284 void G1CollectedHeap::handle_evacuation_failure_common(oop old, markOop m) { | |
| 4285 set_evacuation_failed(true); | |
| 4286 | |
| 4287 preserve_mark_if_necessary(old, m); | |
| 4288 | |
| 4289 HeapRegion* r = heap_region_containing(old); | |
| 4290 if (!r->evacuation_failed()) { | |
| 4291 r->set_evacuation_failed(true); | |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4292 _hr_printer.evac_failure(r); |
| 342 | 4293 } |
| 4294 | |
| 4295 push_on_evac_failure_scan_stack(old); | |
| 4296 | |
| 4297 if (!_drain_in_progress) { | |
| 4298 // prevent recursion in copy_to_survivor_space() | |
| 4299 _drain_in_progress = true; | |
| 4300 drain_evac_failure_scan_stack(); | |
| 4301 _drain_in_progress = false; | |
| 4302 } | |
| 4303 } | |
| 4304 | |
| 4305 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
|
4306 assert(evacuation_failed(), "Oversaving!"); |
|
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4307 // 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
|
4308 // case of a promotion failure. |
|
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4309 if (m->must_be_preserved_for_promotion_failure(obj)) { |
| 342 | 4310 if (_objs_with_preserved_marks == NULL) { |
| 4311 assert(_preserved_marks_of_objs == NULL, "Both or none."); | |
| 4312 _objs_with_preserved_marks = | |
| 6197 | 4313 new (ResourceObj::C_HEAP, mtGC) GrowableArray<oop>(40, true); |
| 342 | 4314 _preserved_marks_of_objs = |
| 6197 | 4315 new (ResourceObj::C_HEAP, mtGC) GrowableArray<markOop>(40, true); |
| 342 | 4316 } |
| 4317 _objs_with_preserved_marks->push(obj); | |
| 4318 _preserved_marks_of_objs->push(m); | |
| 4319 } | |
| 4320 } | |
| 4321 | |
| 4322 HeapWord* G1CollectedHeap::par_allocate_during_gc(GCAllocPurpose purpose, | |
| 4323 size_t word_size) { | |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4324 if (purpose == GCAllocForSurvived) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4325 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
|
4326 if (result != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4327 return result; |
| 342 | 4328 } else { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4329 // 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
|
4330 // object there. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4331 return old_attempt_allocation(word_size); |
| 342 | 4332 } |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4333 } else { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4334 assert(purpose == GCAllocForTenured, "sanity"); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4335 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
|
4336 if (result != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4337 return result; |
| 342 | 4338 } else { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4339 // 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
|
4340 // object there. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4341 return survivor_attempt_allocation(word_size); |
| 342 | 4342 } |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4343 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4344 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4345 ShouldNotReachHere(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4346 // 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
|
4347 return NULL; |
| 342 | 4348 } |
| 4349 | |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4350 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
|
4351 ParGCAllocBuffer(gclab_word_size), _retired(false) { } |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4352 |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4353 G1ParScanThreadState::G1ParScanThreadState(G1CollectedHeap* g1h, uint queue_num) |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4354 : _g1h(g1h), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4355 _refs(g1h->task_queue(queue_num)), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4356 _dcq(&g1h->dirty_card_queue_set()), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4357 _ct_bs((CardTableModRefBS*)_g1h->barrier_set()), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4358 _g1_rem(g1h->g1_rem_set()), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4359 _hash_seed(17), _queue_num(queue_num), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4360 _term_attempts(0), |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4361 _surviving_alloc_buffer(g1h->desired_plab_sz(GCAllocForSurvived)), |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4362 _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
|
4363 _age_table(false), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4364 _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
|
4365 _alloc_buffer_waste(0), _undo_waste(0) { |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4366 // we allocate G1YoungSurvRateNumRegions plus one entries, since |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4367 // 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
|
4368 // non-young regions (where the age is -1) |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4369 // 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
|
4370 // an attempt to eliminate cache contention |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4371 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
|
4372 uint array_length = PADDING_ELEM_NUM + |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4373 real_length + |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4374 PADDING_ELEM_NUM; |
| 6197 | 4375 _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
|
4376 if (_surviving_young_words_base == NULL) |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4377 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
|
4378 "Not enough space for young surv histo."); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4379 _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
|
4380 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
|
4381 |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4382 _alloc_buffers[GCAllocForSurvived] = &_surviving_alloc_buffer; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4383 _alloc_buffers[GCAllocForTenured] = &_tenured_alloc_buffer; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4384 |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4385 _start = os::elapsedTime(); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4386 } |
| 342 | 4387 |
| 1709 | 4388 void |
| 4389 G1ParScanThreadState::print_termination_stats_hdr(outputStream* const st) | |
| 4390 { | |
| 4391 st->print_raw_cr("GC Termination Stats"); | |
| 4392 st->print_raw_cr(" elapsed --strong roots-- -------termination-------" | |
| 4393 " ------waste (KiB)------"); | |
| 4394 st->print_raw_cr("thr ms ms % ms % attempts" | |
| 4395 " total alloc undo"); | |
| 4396 st->print_raw_cr("--- --------- --------- ------ --------- ------ --------" | |
| 4397 " ------- ------- -------"); | |
| 4398 } | |
| 4399 | |
| 4400 void | |
| 4401 G1ParScanThreadState::print_termination_stats(int i, | |
| 4402 outputStream* const st) const | |
| 4403 { | |
| 4404 const double elapsed_ms = elapsed_time() * 1000.0; | |
| 4405 const double s_roots_ms = strong_roots_time() * 1000.0; | |
| 4406 const double term_ms = term_time() * 1000.0; | |
| 4407 st->print_cr("%3d %9.2f %9.2f %6.2f " | |
| 4408 "%9.2f %6.2f " SIZE_FORMAT_W(8) " " | |
| 4409 SIZE_FORMAT_W(7) " " SIZE_FORMAT_W(7) " " SIZE_FORMAT_W(7), | |
| 4410 i, elapsed_ms, s_roots_ms, s_roots_ms * 100 / elapsed_ms, | |
| 4411 term_ms, term_ms * 100 / elapsed_ms, term_attempts(), | |
| 4412 (alloc_buffer_waste() + undo_waste()) * HeapWordSize / K, | |
| 4413 alloc_buffer_waste() * HeapWordSize / K, | |
| 4414 undo_waste() * HeapWordSize / K); | |
| 4415 } | |
| 4416 | |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4417 #ifdef ASSERT |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4418 bool G1ParScanThreadState::verify_ref(narrowOop* ref) const { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4419 assert(ref != NULL, "invariant"); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4420 assert(UseCompressedOops, "sanity"); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4421 assert(!has_partial_array_mask(ref), err_msg("ref=" PTR_FORMAT, ref)); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4422 oop p = oopDesc::load_decode_heap_oop(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4423 assert(_g1h->is_in_g1_reserved(p), |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4424 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, intptr_t(p))); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4425 return true; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4426 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4427 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4428 bool G1ParScanThreadState::verify_ref(oop* ref) const { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4429 assert(ref != NULL, "invariant"); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4430 if (has_partial_array_mask(ref)) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4431 // Must be in the collection set--it's already been copied. |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4432 oop p = clear_partial_array_mask(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4433 assert(_g1h->obj_in_cs(p), |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4434 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, intptr_t(p))); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4435 } else { |
|
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 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4440 return true; |
|
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 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4443 bool G1ParScanThreadState::verify_task(StarTask ref) const { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4444 if (ref.is_narrow()) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4445 return verify_ref((narrowOop*) ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4446 } else { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4447 return verify_ref((oop*) ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4448 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4449 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4450 #endif // ASSERT |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4451 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4452 void G1ParScanThreadState::trim_queue() { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4453 assert(_evac_cl != NULL, "not set"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4454 assert(_evac_failure_cl != NULL, "not set"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4455 assert(_partial_scan_cl != NULL, "not set"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4456 |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4457 StarTask ref; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4458 do { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4459 // Drain the overflow stack first, so other threads can steal. |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4460 while (refs()->pop_overflow(ref)) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4461 deal_with_reference(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4462 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4463 |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4464 while (refs()->pop_local(ref)) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4465 deal_with_reference(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4466 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4467 } while (!refs()->is_empty()); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4468 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4469 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4470 G1ParClosureSuper::G1ParClosureSuper(G1CollectedHeap* g1, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4471 G1ParScanThreadState* par_scan_state) : |
| 342 | 4472 _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:
3869
diff
changeset
|
4473 _par_scan_state(par_scan_state), |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4474 _worker_id(par_scan_state->queue_num()), |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4475 _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
|
4476 _mark_in_progress(_g1->mark_in_progress()) { } |
|
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4477 |
| 5987 | 4478 template <bool do_gen_barrier, G1Barrier barrier, bool do_mark_object> |
| 4479 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
|
4480 #ifdef ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4481 HeapRegion* hr = _g1->heap_region_containing(obj); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4482 assert(hr != NULL, "sanity"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4483 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
|
4484 #endif // ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4485 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
4785
diff
changeset
|
4486 // 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
|
4487 _cm->grayRoot(obj, (size_t) obj->size(), _worker_id); |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
4785
diff
changeset
|
4488 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
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diff
changeset
|
4489 |
| 5987 | 4490 template <bool do_gen_barrier, G1Barrier barrier, bool do_mark_object> |
| 4491 void G1ParCopyClosure<do_gen_barrier, barrier, do_mark_object> | |
| 4492 ::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
|
4493 #ifdef ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4494 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
|
4495 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
|
4496 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
|
4497 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
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diff
changeset
|
4498 HeapRegion* from_hr = _g1->heap_region_containing(from_obj); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
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diff
changeset
|
4499 assert(from_hr != NULL, "sanity"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4500 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
|
4501 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
4785
diff
changeset
|
4502 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
|
4503 assert(to_hr != NULL, "sanity"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4504 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
|
4505 #endif // ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4506 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4507 // 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
|
4508 // 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
|
4509 // 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
|
4510 // image which we know should not be changing. |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4511 _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
|
4512 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4513 |
| 5987 | 4514 template <bool do_gen_barrier, G1Barrier barrier, bool do_mark_object> |
| 4515 oop G1ParCopyClosure<do_gen_barrier, barrier, do_mark_object> | |
| 4516 ::copy_to_survivor_space(oop old) { | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4517 size_t word_sz = old->size(); |
| 342 | 4518 HeapRegion* from_region = _g1->heap_region_containing_raw(old); |
| 4519 // +1 to make the -1 indexes valid... | |
| 4520 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
|
4521 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
|
4522 (!from_region->is_young() && young_index == 0), "invariant" ); |
| 342 | 4523 G1CollectorPolicy* g1p = _g1->g1_policy(); |
| 4524 markOop m = old->mark(); | |
| 545 | 4525 int age = m->has_displaced_mark_helper() ? m->displaced_mark_helper()->age() |
| 4526 : m->age(); | |
| 4527 GCAllocPurpose alloc_purpose = g1p->evacuation_destination(from_region, age, | |
| 342 | 4528 word_sz); |
| 4529 HeapWord* obj_ptr = _par_scan_state->allocate(alloc_purpose, word_sz); | |
| 4530 oop obj = oop(obj_ptr); | |
| 4531 | |
| 4532 if (obj_ptr == NULL) { | |
| 4533 // This will either forward-to-self, or detect that someone else has | |
| 4534 // installed a forwarding pointer. | |
| 4535 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
|
4536 return _g1->handle_evacuation_failure_par(cl, old); |
| 342 | 4537 } |
| 4538 | |
| 526 | 4539 // We're going to allocate linearly, so might as well prefetch ahead. |
| 4540 Prefetch::write(obj_ptr, PrefetchCopyIntervalInBytes); | |
| 4541 | |
| 342 | 4542 oop forward_ptr = old->forward_to_atomic(obj); |
| 4543 if (forward_ptr == NULL) { | |
| 4544 Copy::aligned_disjoint_words((HeapWord*) old, obj_ptr, word_sz); | |
| 526 | 4545 if (g1p->track_object_age(alloc_purpose)) { |
| 4546 // We could simply do obj->incr_age(). However, this causes a | |
| 4547 // performance issue. obj->incr_age() will first check whether | |
| 4548 // the object has a displaced mark by checking its mark word; | |
| 4549 // getting the mark word from the new location of the object | |
| 4550 // stalls. So, given that we already have the mark word and we | |
| 4551 // are about to install it anyway, it's better to increase the | |
| 4552 // age on the mark word, when the object does not have a | |
| 4553 // displaced mark word. We're not expecting many objects to have | |
| 4554 // a displaced marked word, so that case is not optimized | |
| 4555 // further (it could be...) and we simply call obj->incr_age(). | |
| 4556 | |
| 4557 if (m->has_displaced_mark_helper()) { | |
| 4558 // in this case, we have to install the mark word first, | |
| 4559 // otherwise obj looks to be forwarded (the old mark word, | |
| 4560 // which contains the forward pointer, was copied) | |
| 4561 obj->set_mark(m); | |
| 4562 obj->incr_age(); | |
| 4563 } else { | |
| 4564 m = m->incr_age(); | |
| 545 | 4565 obj->set_mark(m); |
| 526 | 4566 } |
| 545 | 4567 _par_scan_state->age_table()->add(obj, word_sz); |
| 4568 } else { | |
| 4569 obj->set_mark(m); | |
| 526 | 4570 } |
| 4571 | |
| 342 | 4572 size_t* surv_young_words = _par_scan_state->surviving_young_words(); |
| 4573 surv_young_words[young_index] += word_sz; | |
| 4574 | |
| 4575 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
|
4576 // 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
|
4577 // 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
|
4578 // 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
|
4579 arrayOop(obj)->set_length(0); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4580 oop* old_p = set_partial_array_mask(old); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4581 _par_scan_state->push_on_queue(old_p); |
| 342 | 4582 } else { |
| 526 | 4583 // No point in using the slower heap_region_containing() method, |
| 4584 // given that we know obj is in the heap. | |
| 5987 | 4585 _scanner.set_region(_g1->heap_region_containing_raw(obj)); |
| 4586 obj->oop_iterate_backwards(&_scanner); | |
| 342 | 4587 } |
| 4588 } else { | |
| 4589 _par_scan_state->undo_allocation(alloc_purpose, obj_ptr, word_sz); | |
| 4590 obj = forward_ptr; | |
| 4591 } | |
| 4592 return obj; | |
| 4593 } | |
| 4594 | |
|
3886
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7080389: G1: refactor marking code in evacuation pause copy closures
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parents:
3869
diff
changeset
|
4595 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
|
4596 template <class T> |
|
3886
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7080389: G1: refactor marking code in evacuation pause copy closures
johnc
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3869
diff
changeset
|
4597 void G1ParCopyClosure<do_gen_barrier, barrier, do_mark_object> |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
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838
diff
changeset
|
4598 ::do_oop_work(T* p) { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4599 oop obj = oopDesc::load_decode_heap_oop(p); |
| 342 | 4600 assert(barrier != G1BarrierRS || obj != NULL, |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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4785
diff
changeset
|
4601 "Precondition: G1BarrierRS implies obj is non-NULL"); |
|
3886
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7080389: G1: refactor marking code in evacuation pause copy closures
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parents:
3869
diff
changeset
|
4602 |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
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parents:
4834
diff
changeset
|
4603 assert(_worker_id == _par_scan_state->queue_num(), "sanity"); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4604 |
| 526 | 4605 // 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
|
4606 if (_g1->in_cset_fast_test(obj)) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
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4785
diff
changeset
|
4607 oop forwardee; |
| 526 | 4608 if (obj->is_forwarded()) { |
|
4787
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6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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4785
diff
changeset
|
4609 forwardee = obj->forwardee(); |
| 526 | 4610 } else { |
|
4787
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6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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4785
diff
changeset
|
4611 forwardee = copy_to_survivor_space(obj); |
| 342 | 4612 } |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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4785
diff
changeset
|
4613 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
|
4614 oopDesc::encode_store_heap_oop(p, forwardee); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4615 if (do_mark_object && forwardee != obj) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4616 // If the object is self-forwarded we don't need to explicitly |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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4785
diff
changeset
|
4617 // 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
|
4618 mark_forwarded_object(obj, forwardee); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4619 } |
|
2ace1c4ee8da
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4785
diff
changeset
|
4620 |
| 526 | 4621 // When scanning the RS, we only care about objs in CS. |
| 4622 if (barrier == G1BarrierRS) { | |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
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4834
diff
changeset
|
4623 _par_scan_state->update_rs(_from, p, _worker_id); |
| 342 | 4624 } |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4625 } else { |
|
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4626 // 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
|
4627 // 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
|
4628 // 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
|
4629 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
|
4630 mark_object(obj); |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4631 } |
| 526 | 4632 } |
| 4633 | |
| 4634 if (barrier == G1BarrierEvac && obj != NULL) { | |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4635 _par_scan_state->update_rs(_from, p, _worker_id); |
| 526 | 4636 } |
| 4637 | |
| 4638 if (do_gen_barrier && obj != NULL) { | |
| 4639 par_do_barrier(p); | |
| 4640 } | |
| 4641 } | |
| 4642 | |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
4643 template void G1ParCopyClosure<false, G1BarrierEvac, false>::do_oop_work(oop* p); |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
4644 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
|
4645 |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4646 template <class T> void G1ParScanPartialArrayClosure::do_oop_nv(T* p) { |
| 526 | 4647 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
|
4648 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
|
4649 |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4650 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
|
4651 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
|
4652 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
|
4653 // 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
|
4654 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
|
4655 |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4656 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
|
4657 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
|
4658 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
|
4659 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
|
4660 // 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
|
4661 // to-space object. |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4662 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
|
4663 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
|
4664 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
|
4665 |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4666 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
|
4667 int end = length; |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4668 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
|
4669 // We'll try not to push a range that's smaller than ParGCArrayScanChunk. |
| 342 | 4670 if (remainder > 2 * ParGCArrayScanChunk) { |
| 4671 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
|
4672 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
|
4673 // 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
|
4674 // 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
|
4675 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
|
4676 _par_scan_state->push_on_queue(from_obj_p); |
| 342 | 4677 } else { |
|
4784
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4678 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
|
4679 // 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
|
4680 // 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
|
4681 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
|
4682 } |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4683 _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
|
4684 // 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
|
4685 // 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
|
4686 // 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
|
4687 // 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
|
4688 // 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
|
4689 // 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
|
4690 // 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
|
4691 // 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
|
4692 to_obj_array->oop_iterate_range(&_scanner, start, end); |
| 342 | 4693 } |
| 4694 | |
| 4695 class G1ParEvacuateFollowersClosure : public VoidClosure { | |
| 4696 protected: | |
| 4697 G1CollectedHeap* _g1h; | |
| 4698 G1ParScanThreadState* _par_scan_state; | |
| 4699 RefToScanQueueSet* _queues; | |
| 4700 ParallelTaskTerminator* _terminator; | |
| 4701 | |
| 4702 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } | |
| 4703 RefToScanQueueSet* queues() { return _queues; } | |
| 4704 ParallelTaskTerminator* terminator() { return _terminator; } | |
| 4705 | |
| 4706 public: | |
| 4707 G1ParEvacuateFollowersClosure(G1CollectedHeap* g1h, | |
| 4708 G1ParScanThreadState* par_scan_state, | |
| 4709 RefToScanQueueSet* queues, | |
| 4710 ParallelTaskTerminator* terminator) | |
| 4711 : _g1h(g1h), _par_scan_state(par_scan_state), | |
| 4712 _queues(queues), _terminator(terminator) {} | |
| 4713 | |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4714 void do_void(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4715 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4716 private: |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4717 inline bool offer_termination(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4718 }; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4719 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4720 bool G1ParEvacuateFollowersClosure::offer_termination() { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4721 G1ParScanThreadState* const pss = par_scan_state(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4722 pss->start_term_time(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4723 const bool res = terminator()->offer_termination(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4724 pss->end_term_time(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4725 return res; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4726 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4727 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4728 void G1ParEvacuateFollowersClosure::do_void() { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4729 StarTask stolen_task; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4730 G1ParScanThreadState* const pss = par_scan_state(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4731 pss->trim_queue(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4732 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4733 do { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4734 while (queues()->steal(pss->queue_num(), pss->hash_seed(), stolen_task)) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4735 assert(pss->verify_task(stolen_task), "sanity"); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4736 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
|
4737 pss->deal_with_reference((narrowOop*) stolen_task); |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4738 } else { |
|
1883
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
1862
diff
changeset
|
4739 pss->deal_with_reference((oop*) stolen_task); |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4740 } |
|
1883
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
1862
diff
changeset
|
4741 |
|
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
1862
diff
changeset
|
4742 // 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
|
4743 // 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
|
4744 // we drain the queues as necessary. |
| 342 | 4745 pss->trim_queue(); |
| 4746 } | |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4747 } while (!offer_termination()); |
|
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 pss->retire_alloc_buffers(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4750 } |
| 342 | 4751 |
| 4752 class G1ParTask : public AbstractGangTask { | |
| 4753 protected: | |
| 4754 G1CollectedHeap* _g1h; | |
| 4755 RefToScanQueueSet *_queues; | |
| 4756 ParallelTaskTerminator _terminator; | |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
4757 uint _n_workers; |
| 342 | 4758 |
| 4759 Mutex _stats_lock; | |
| 4760 Mutex* stats_lock() { return &_stats_lock; } | |
| 4761 | |
| 4762 size_t getNCards() { | |
| 4763 return (_g1h->capacity() + G1BlockOffsetSharedArray::N_bytes - 1) | |
| 4764 / G1BlockOffsetSharedArray::N_bytes; | |
| 4765 } | |
| 4766 | |
| 4767 public: | |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4768 G1ParTask(G1CollectedHeap* g1h, |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4769 RefToScanQueueSet *task_queues) |
| 342 | 4770 : AbstractGangTask("G1 collection"), |
| 4771 _g1h(g1h), | |
| 4772 _queues(task_queues), | |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4773 _terminator(0, _queues), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4774 _stats_lock(Mutex::leaf, "parallel G1 stats lock", true) |
| 342 | 4775 {} |
| 4776 | |
| 4777 RefToScanQueueSet* queues() { return _queues; } | |
| 4778 | |
| 4779 RefToScanQueue *work_queue(int i) { | |
| 4780 return queues()->queue(i); | |
| 4781 } | |
| 4782 | |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4783 ParallelTaskTerminator* terminator() { return &_terminator; } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4784 |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4785 virtual void set_for_termination(int active_workers) { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4786 // This task calls set_n_termination() in par_non_clean_card_iterate_work() |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4787 // in the young space (_par_seq_tasks) in the G1 heap |
|
bca17e38de00
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|
4788 // for SequentialSubTasksDone. |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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|
4789 // This task also uses SubTasksDone in SharedHeap and G1CollectedHeap |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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|
4790 // both of which need setting by set_n_termination(). |
|
bca17e38de00
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|
4791 _g1h->SharedHeap::set_n_termination(active_workers); |
|
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|
4792 _g1h->set_n_termination(active_workers); |
|
bca17e38de00
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|
4793 terminator()->reset_for_reuse(active_workers); |
|
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|
4794 _n_workers = active_workers; |
|
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diff
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|
4795 } |
|
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diff
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|
4796 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
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4711
diff
changeset
|
4797 void work(uint worker_id) { |
|
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7121618: Change type of number of GC workers to unsigned int.
jmasa
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4711
diff
changeset
|
4798 if (worker_id >= _n_workers) return; // no work needed this round |
| 1611 | 4799 |
| 4800 double start_time_ms = os::elapsedTime() * 1000.0; | |
|
6219
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|
4801 _g1h->g1_policy()->phase_times()->record_gc_worker_start_time(worker_id, start_time_ms); |
| 1611 | 4802 |
|
5986
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|
4803 { |
|
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|
4804 ResourceMark rm; |
|
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|
4805 HandleMark hm; |
|
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|
4806 |
|
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|
4807 ReferenceProcessor* rp = _g1h->ref_processor_stw(); |
|
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|
4808 |
|
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|
4809 G1ParScanThreadState pss(_g1h, worker_id); |
|
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|
4810 G1ParScanHeapEvacClosure scan_evac_cl(_g1h, &pss, rp); |
|
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|
4811 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, rp); |
|
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|
4812 G1ParScanPartialArrayClosure partial_scan_cl(_g1h, &pss, rp); |
|
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|
4813 |
|
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|
4814 pss.set_evac_closure(&scan_evac_cl); |
|
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|
4815 pss.set_evac_failure_closure(&evac_failure_cl); |
|
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|
4816 pss.set_partial_scan_closure(&partial_scan_cl); |
|
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|
4817 |
|
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changeset
|
4818 G1ParScanExtRootClosure only_scan_root_cl(_g1h, &pss, rp); |
|
500023bd0818
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|
4819 G1ParScanPermClosure only_scan_perm_cl(_g1h, &pss, rp); |
|
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|
4820 |
|
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diff
changeset
|
4821 G1ParScanAndMarkExtRootClosure scan_mark_root_cl(_g1h, &pss, rp); |
|
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|
4822 G1ParScanAndMarkPermClosure scan_mark_perm_cl(_g1h, &pss, rp); |
|
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|
4823 |
|
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changeset
|
4824 OopClosure* scan_root_cl = &only_scan_root_cl; |
|
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changeset
|
4825 OopsInHeapRegionClosure* scan_perm_cl = &only_scan_perm_cl; |
|
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diff
changeset
|
4826 |
|
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diff
changeset
|
4827 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
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5963
diff
changeset
|
4828 // We also need to mark copied objects. |
|
500023bd0818
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5963
diff
changeset
|
4829 scan_root_cl = &scan_mark_root_cl; |
|
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5963
diff
changeset
|
4830 scan_perm_cl = &scan_mark_perm_cl; |
|
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5963
diff
changeset
|
4831 } |
|
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5963
diff
changeset
|
4832 |
|
500023bd0818
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parents:
5963
diff
changeset
|
4833 G1ParPushHeapRSClosure push_heap_rs_cl(_g1h, &pss); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4834 |
|
500023bd0818
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parents:
5963
diff
changeset
|
4835 pss.start_strong_roots(); |
|
500023bd0818
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parents:
5963
diff
changeset
|
4836 _g1h->g1_process_strong_roots(/* not collecting perm */ false, |
|
500023bd0818
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parents:
5963
diff
changeset
|
4837 SharedHeap::SO_AllClasses, |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4838 scan_root_cl, |
|
500023bd0818
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parents:
5963
diff
changeset
|
4839 &push_heap_rs_cl, |
|
500023bd0818
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parents:
5963
diff
changeset
|
4840 scan_perm_cl, |
|
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parents:
5963
diff
changeset
|
4841 worker_id); |
|
500023bd0818
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parents:
5963
diff
changeset
|
4842 pss.end_strong_roots(); |
|
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parents:
5963
diff
changeset
|
4843 |
|
500023bd0818
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parents:
5963
diff
changeset
|
4844 { |
|
500023bd0818
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parents:
5963
diff
changeset
|
4845 double start = os::elapsedTime(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4846 G1ParEvacuateFollowersClosure evac(_g1h, &pss, _queues, &_terminator); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4847 evac.do_void(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4848 double elapsed_ms = (os::elapsedTime()-start)*1000.0; |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4849 double term_ms = pss.term_time()*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
|
4850 _g1h->g1_policy()->phase_times()->record_obj_copy_time(worker_id, elapsed_ms-term_ms); |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4851 _g1h->g1_policy()->phase_times()->record_termination(worker_id, term_ms, pss.term_attempts()); |
|
5986
500023bd0818
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parents:
5963
diff
changeset
|
4852 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4853 _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
|
4854 _g1h->update_surviving_young_words(pss.surviving_young_words()+1); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4855 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4856 if (ParallelGCVerbose) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4857 MutexLocker x(stats_lock()); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4858 pss.print_termination_stats(worker_id); |
|
500023bd0818
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johnc
parents:
5963
diff
changeset
|
4859 } |
|
500023bd0818
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johnc
parents:
5963
diff
changeset
|
4860 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4861 assert(pss.refs()->is_empty(), "should be empty"); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4862 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4863 // 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
|
4864 // destructors are executed here and are included as part of the |
|
500023bd0818
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parents:
5963
diff
changeset
|
4865 // "GC Worker Time". |
| 342 | 4866 } |
| 4867 | |
| 1611 | 4868 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
|
4869 _g1h->g1_policy()->phase_times()->record_gc_worker_end_time(worker_id, end_time_ms); |
| 342 | 4870 } |
| 4871 }; | |
| 4872 | |
| 4873 // *** Common G1 Evacuation Stuff | |
| 4874 | |
|
5986
500023bd0818
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johnc
parents:
5963
diff
changeset
|
4875 // 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
|
4876 // external root scanning. |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4877 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4878 // 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
|
4879 // 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
|
4880 // 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
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5963
diff
changeset
|
4881 // that only nmethods that point into the collection set are added to the |
|
500023bd0818
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5963
diff
changeset
|
4882 // 'marked' list. |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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5963
diff
changeset
|
4883 |
|
500023bd0818
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parents:
5963
diff
changeset
|
4884 class G1FilteredCodeBlobToOopClosure : public CodeBlobToOopClosure { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4885 |
|
500023bd0818
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5963
diff
changeset
|
4886 class G1PointsIntoCSOopClosure : public OopClosure { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4887 G1CollectedHeap* _g1; |
|
500023bd0818
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5963
diff
changeset
|
4888 bool _points_into_cs; |
|
500023bd0818
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5963
diff
changeset
|
4889 public: |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4890 G1PointsIntoCSOopClosure(G1CollectedHeap* g1) : |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4891 _g1(g1), _points_into_cs(false) { } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4892 |
|
500023bd0818
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5963
diff
changeset
|
4893 bool points_into_cs() const { return _points_into_cs; } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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5963
diff
changeset
|
4894 |
|
500023bd0818
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5963
diff
changeset
|
4895 template <class T> |
|
500023bd0818
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5963
diff
changeset
|
4896 void do_oop_nv(T* p) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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5963
diff
changeset
|
4897 if (!_points_into_cs) { |
|
500023bd0818
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5963
diff
changeset
|
4898 T heap_oop = oopDesc::load_heap_oop(p); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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5963
diff
changeset
|
4899 if (!oopDesc::is_null(heap_oop) && |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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5963
diff
changeset
|
4900 _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)
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5963
diff
changeset
|
4901 _points_into_cs = true; |
|
500023bd0818
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5963
diff
changeset
|
4902 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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5963
diff
changeset
|
4903 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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diff
changeset
|
4904 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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diff
changeset
|
4905 |
|
500023bd0818
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diff
changeset
|
4906 virtual void do_oop(oop* p) { do_oop_nv(p); } |
|
500023bd0818
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5963
diff
changeset
|
4907 virtual void do_oop(narrowOop* p) { do_oop_nv(p); } |
|
500023bd0818
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|
4908 }; |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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diff
changeset
|
4909 |
|
500023bd0818
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diff
changeset
|
4910 G1CollectedHeap* _g1; |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4911 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4912 public: |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4913 G1FilteredCodeBlobToOopClosure(G1CollectedHeap* g1, OopClosure* cl) : |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4914 CodeBlobToOopClosure(cl, true), _g1(g1) { } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4915 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4916 virtual void do_code_blob(CodeBlob* cb) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4917 nmethod* nm = cb->as_nmethod_or_null(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4918 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
|
4919 G1PointsIntoCSOopClosure predicate_cl(_g1); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4920 nm->oops_do(&predicate_cl); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4921 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4922 if (predicate_cl.points_into_cs()) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4923 // 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
|
4924 // 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
|
4925 // 'mark' this nmethod. |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4926 // 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
|
4927 // or MarkingCodeBlobClosure::do_code_blob() change. |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4928 if (!nm->test_set_oops_do_mark()) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4929 do_newly_marked_nmethod(nm); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4930 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4931 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4932 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4933 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4934 }; |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4935 |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
4936 // This method is run in a GC worker. |
|
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
4937 |
| 342 | 4938 void |
| 4939 G1CollectedHeap:: | |
| 4940 g1_process_strong_roots(bool collecting_perm_gen, | |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
4941 ScanningOption so, |
| 342 | 4942 OopClosure* scan_non_heap_roots, |
| 4943 OopsInHeapRegionClosure* scan_rs, | |
| 4944 OopsInGenClosure* scan_perm, | |
| 4945 int worker_i) { | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4946 |
| 342 | 4947 // First scan the strong roots, including the perm gen. |
| 4948 double ext_roots_start = os::elapsedTime(); | |
| 4949 double closure_app_time_sec = 0.0; | |
| 4950 | |
| 4951 BufferingOopClosure buf_scan_non_heap_roots(scan_non_heap_roots); | |
| 4952 BufferingOopsInGenClosure buf_scan_perm(scan_perm); | |
| 4953 buf_scan_perm.set_generation(perm_gen()); | |
| 4954 | |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
4955 // 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
|
4956 // unaligned oop locations. |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4957 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
|
4958 |
|
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
4959 process_strong_roots(false, // no scoping; this is parallel code |
|
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
4960 collecting_perm_gen, so, |
| 342 | 4961 &buf_scan_non_heap_roots, |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
4962 &eager_scan_code_roots, |
| 342 | 4963 &buf_scan_perm); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4964 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4965 // 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
|
4966 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
|
4967 // We need to treat the discovered reference lists of the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4968 // concurrent mark ref processor as roots and keep entries |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4969 // (which are added by the marking threads) on them live |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4970 // until they can be processed at the end of marking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4971 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
|
4972 } |
|
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
4973 |
|
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
4974 // Finish up any enqueued closure apps (attributed as object copy time). |
| 342 | 4975 buf_scan_non_heap_roots.done(); |
| 4976 buf_scan_perm.done(); | |
|
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
4977 |
| 342 | 4978 double ext_roots_end = os::elapsedTime(); |
|
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
4979 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4980 g1_policy()->phase_times()->reset_obj_copy_time(worker_i); |
|
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
4981 double obj_copy_time_sec = buf_scan_perm.closure_app_seconds() + |
|
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
4982 buf_scan_non_heap_roots.closure_app_seconds(); |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4983 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
|
4984 |
| 342 | 4985 double ext_root_time_ms = |
| 4986 ((ext_roots_end - 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
|
4987 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4988 g1_policy()->phase_times()->record_ext_root_scan_time(worker_i, ext_root_time_ms); |
| 342 | 4989 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4990 // During conc marking we have to filter the per-thread SATB buffers |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4991 // to make sure we remove any oops into the CSet (which will show up |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4992 // as implicitly live). |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4993 if (!_process_strong_tasks->is_task_claimed(G1H_PS_filter_satb_buffers)) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4994 if (mark_in_progress()) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4995 JavaThread::satb_mark_queue_set().filter_thread_buffers(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4996 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4997 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4998 double satb_filtering_ms = (os::elapsedTime() - ext_roots_end) * 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
|
4999 g1_policy()->phase_times()->record_satb_filtering_time(worker_i, satb_filtering_ms); |
| 342 | 5000 |
| 5001 // Now scan the complement of the collection set. | |
| 5002 if (scan_rs != NULL) { | |
| 5003 g1_rem_set()->oops_into_collection_set_do(scan_rs, worker_i); | |
| 5004 } | |
|
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
5005 |
| 342 | 5006 _process_strong_tasks->all_tasks_completed(); |
| 5007 } | |
| 5008 | |
| 5009 void | |
| 5010 G1CollectedHeap::g1_process_weak_roots(OopClosure* root_closure, | |
| 5011 OopClosure* non_root_closure) { | |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5012 CodeBlobToOopClosure roots_in_blobs(root_closure, /*do_marking=*/ false); |
|
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5013 SharedHeap::process_weak_roots(root_closure, &roots_in_blobs, non_root_closure); |
| 342 | 5014 } |
| 5015 | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5016 // Weak Reference Processing support |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5017 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5018 // An always "is_alive" closure that is used to preserve referents. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5019 // If the object is non-null then it's alive. Used in the preservation |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5020 // of referent objects that are pointed to by reference objects |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5021 // discovered by the CM ref processor. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5022 class G1AlwaysAliveClosure: public BoolObjectClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5023 G1CollectedHeap* _g1; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5024 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5025 G1AlwaysAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5026 void do_object(oop p) { assert(false, "Do not call."); } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5027 bool do_object_b(oop p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5028 if (p != NULL) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5029 return true; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5030 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5031 return false; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5032 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5033 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5034 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5035 bool G1STWIsAliveClosure::do_object_b(oop p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5036 // An object is reachable if it is outside the collection set, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5037 // or is inside and copied. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5038 return !_g1->obj_in_cs(p) || p->is_forwarded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5039 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5040 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5041 // Non Copying Keep Alive closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5042 class G1KeepAliveClosure: public OopClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5043 G1CollectedHeap* _g1; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5044 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5045 G1KeepAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5046 void do_oop(narrowOop* p) { guarantee(false, "Not needed"); } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5047 void do_oop( oop* p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5048 oop obj = *p; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5049 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5050 if (_g1->obj_in_cs(obj)) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5051 assert( obj->is_forwarded(), "invariant" ); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5052 *p = obj->forwardee(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5053 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5054 } |
|
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changeset
|
5055 }; |
|
4dfb2df418f2
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diff
changeset
|
5056 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5057 // Copying Keep Alive closure - can be called from both |
|
4dfb2df418f2
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diff
changeset
|
5058 // serial and parallel code as long as different worker |
|
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changeset
|
5059 // threads utilize different G1ParScanThreadState instances |
|
4dfb2df418f2
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diff
changeset
|
5060 // and different queues. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5061 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5062 class G1CopyingKeepAliveClosure: public OopClosure { |
|
4dfb2df418f2
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changeset
|
5063 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
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changeset
|
5064 OopClosure* _copy_non_heap_obj_cl; |
|
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|
5065 OopsInHeapRegionClosure* _copy_perm_obj_cl; |
|
4dfb2df418f2
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|
5066 G1ParScanThreadState* _par_scan_state; |
|
4dfb2df418f2
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changeset
|
5067 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5068 public: |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5069 G1CopyingKeepAliveClosure(G1CollectedHeap* g1h, |
|
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changeset
|
5070 OopClosure* non_heap_obj_cl, |
|
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changeset
|
5071 OopsInHeapRegionClosure* perm_obj_cl, |
|
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changeset
|
5072 G1ParScanThreadState* pss): |
|
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diff
changeset
|
5073 _g1h(g1h), |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5074 _copy_non_heap_obj_cl(non_heap_obj_cl), |
|
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parents:
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changeset
|
5075 _copy_perm_obj_cl(perm_obj_cl), |
|
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|
5076 _par_scan_state(pss) |
|
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|
5077 {} |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5078 |
|
4dfb2df418f2
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parents:
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changeset
|
5079 virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
|
4dfb2df418f2
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|
5080 virtual void do_oop( oop* p) { do_oop_work(p); } |
|
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changeset
|
5081 |
|
4dfb2df418f2
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changeset
|
5082 template <class T> void do_oop_work(T* p) { |
|
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changeset
|
5083 oop obj = oopDesc::load_decode_heap_oop(p); |
|
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|
5084 |
|
4dfb2df418f2
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diff
changeset
|
5085 if (_g1h->obj_in_cs(obj)) { |
|
4dfb2df418f2
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|
5086 // If the referent object has been forwarded (either copied |
|
4dfb2df418f2
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changeset
|
5087 // to a new location or to itself in the event of an |
|
4dfb2df418f2
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changeset
|
5088 // evacuation failure) then we need to update the reference |
|
4dfb2df418f2
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changeset
|
5089 // field and, if both reference and referent are in the G1 |
|
4dfb2df418f2
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diff
changeset
|
5090 // heap, update the RSet for the referent. |
|
4dfb2df418f2
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parents:
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changeset
|
5091 // |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5092 // If the referent has not been forwarded then we have to keep |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5093 // it alive by policy. Therefore we have copy the referent. |
|
4dfb2df418f2
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parents:
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changeset
|
5094 // |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5095 // If the reference field is in the G1 heap then we can push |
|
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changeset
|
5096 // on the PSS queue. When the queue is drained (after each |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5097 // phase of reference processing) the object and it's followers |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5098 // will be copied, the reference field set to point to the |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5099 // new location, and the RSet updated. Otherwise we need to |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5100 // use the the non-heap or perm closures directly to copy |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5101 // the refernt object and update the pointer, while avoiding |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5102 // updating the RSet. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5103 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5104 if (_g1h->is_in_g1_reserved(p)) { |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5105 _par_scan_state->push_on_queue(p); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5106 } else { |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5107 // The reference field is not in the G1 heap. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5108 if (_g1h->perm_gen()->is_in(p)) { |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5109 _copy_perm_obj_cl->do_oop(p); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5110 } else { |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5111 _copy_non_heap_obj_cl->do_oop(p); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5112 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5113 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5114 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5115 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5116 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5117 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5118 // Serial drain queue closure. Called as the 'complete_gc' |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5119 // closure for each discovered list in some of the |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5120 // reference processing phases. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5121 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5122 class G1STWDrainQueueClosure: public VoidClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5123 protected: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5124 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5125 G1ParScanThreadState* _par_scan_state; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5126 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5127 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5128 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5129 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5130 G1STWDrainQueueClosure(G1CollectedHeap* g1h, G1ParScanThreadState* pss) : |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5131 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5132 _par_scan_state(pss) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5133 { } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5134 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5135 void do_void() { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5136 G1ParScanThreadState* const pss = par_scan_state(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5137 pss->trim_queue(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5138 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5139 }; |
|
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 // Parallel Reference Processing closures |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5142 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5143 // Implementation of AbstractRefProcTaskExecutor for parallel reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5144 // processing during G1 evacuation pauses. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5145 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5146 class G1STWRefProcTaskExecutor: public AbstractRefProcTaskExecutor { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5147 private: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5148 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5149 RefToScanQueueSet* _queues; |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5150 FlexibleWorkGang* _workers; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5151 int _active_workers; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5152 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5153 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5154 G1STWRefProcTaskExecutor(G1CollectedHeap* g1h, |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5155 FlexibleWorkGang* workers, |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5156 RefToScanQueueSet *task_queues, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5157 int n_workers) : |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5158 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5159 _queues(task_queues), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5160 _workers(workers), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5161 _active_workers(n_workers) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5162 { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5163 assert(n_workers > 0, "shouldn't call this otherwise"); |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5164 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5165 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5166 // Executes the given task using concurrent marking worker threads. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5167 virtual void execute(ProcessTask& task); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5168 virtual void execute(EnqueueTask& task); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5169 }; |
|
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
5170 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5171 // Gang task for possibly parallel reference processing |
|
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
5172 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5173 class G1STWRefProcTaskProxy: public AbstractGangTask { |
|
4dfb2df418f2
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diff
changeset
|
5174 typedef AbstractRefProcTaskExecutor::ProcessTask ProcessTask; |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5175 ProcessTask& _proc_task; |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5176 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
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diff
changeset
|
5177 RefToScanQueueSet *_task_queues; |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5178 ParallelTaskTerminator* _terminator; |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5179 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5180 public: |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5181 G1STWRefProcTaskProxy(ProcessTask& proc_task, |
|
4dfb2df418f2
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changeset
|
5182 G1CollectedHeap* g1h, |
|
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|
5183 RefToScanQueueSet *task_queues, |
|
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|
5184 ParallelTaskTerminator* terminator) : |
|
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|
5185 AbstractGangTask("Process reference objects in parallel"), |
|
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changeset
|
5186 _proc_task(proc_task), |
|
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changeset
|
5187 _g1h(g1h), |
|
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|
5188 _task_queues(task_queues), |
|
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|
5189 _terminator(terminator) |
|
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|
5190 {} |
|
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|
5191 |
|
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|
5192 virtual void work(uint worker_id) { |
|
3979
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|
5193 // The reference processing task executed by a single worker. |
|
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|
5194 ResourceMark rm; |
|
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changeset
|
5195 HandleMark hm; |
|
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|
5196 |
|
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|
5197 G1STWIsAliveClosure is_alive(_g1h); |
|
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|
5198 |
|
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|
5199 G1ParScanThreadState pss(_g1h, worker_id); |
|
3979
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|
5200 |
|
4dfb2df418f2
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|
5201 G1ParScanHeapEvacClosure scan_evac_cl(_g1h, &pss, NULL); |
|
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|
5202 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
|
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|
5203 G1ParScanPartialArrayClosure partial_scan_cl(_g1h, &pss, NULL); |
|
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|
5204 |
|
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|
5205 pss.set_evac_closure(&scan_evac_cl); |
|
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|
5206 pss.set_evac_failure_closure(&evac_failure_cl); |
|
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|
5207 pss.set_partial_scan_closure(&partial_scan_cl); |
|
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|
5208 |
|
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|
5209 G1ParScanExtRootClosure only_copy_non_heap_cl(_g1h, &pss, NULL); |
|
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|
5210 G1ParScanPermClosure only_copy_perm_cl(_g1h, &pss, NULL); |
|
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|
5211 |
|
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|
5212 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
|
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|
5213 G1ParScanAndMarkPermClosure copy_mark_perm_cl(_g1h, &pss, NULL); |
|
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|
5214 |
|
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|
5215 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
|
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|
5216 OopsInHeapRegionClosure* copy_perm_cl = &only_copy_perm_cl; |
|
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|
5217 |
|
4dfb2df418f2
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changeset
|
5218 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
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|
5219 // We also need to mark copied objects. |
|
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changeset
|
5220 copy_non_heap_cl = ©_mark_non_heap_cl; |
|
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|
5221 copy_perm_cl = ©_mark_perm_cl; |
|
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|
5222 } |
|
4dfb2df418f2
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parents:
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changeset
|
5223 |
|
4dfb2df418f2
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changeset
|
5224 // Keep alive closure. |
|
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changeset
|
5225 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, copy_perm_cl, &pss); |
|
4dfb2df418f2
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|
5226 |
|
4dfb2df418f2
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changeset
|
5227 // Complete GC closure |
|
4dfb2df418f2
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changeset
|
5228 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _task_queues, _terminator); |
|
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|
5229 |
|
4dfb2df418f2
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changeset
|
5230 // Call the reference processing task's work routine. |
|
4728
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|
5231 _proc_task.work(worker_id, is_alive, keep_alive, drain_queue); |
|
3979
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|
5232 |
|
4dfb2df418f2
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|
5233 // Note we cannot assert that the refs array is empty here as not all |
|
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|
5234 // of the processing tasks (specifically phase2 - pp2_work) execute |
|
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|
5235 // the complete_gc closure (which ordinarily would drain the queue) so |
|
4dfb2df418f2
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|
5236 // the queue may not be empty. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5237 } |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5238 }; |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5239 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5240 // Driver routine for parallel reference processing. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5241 // Creates an instance of the ref processing gang |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5242 // task and has the worker threads execute it. |
|
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changeset
|
5243 void G1STWRefProcTaskExecutor::execute(ProcessTask& proc_task) { |
|
4dfb2df418f2
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parents:
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changeset
|
5244 assert(_workers != NULL, "Need parallel worker threads."); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5245 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5246 ParallelTaskTerminator terminator(_active_workers, _queues); |
|
4dfb2df418f2
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changeset
|
5247 G1STWRefProcTaskProxy proc_task_proxy(proc_task, _g1h, _queues, &terminator); |
|
4dfb2df418f2
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changeset
|
5248 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5249 _g1h->set_par_threads(_active_workers); |
|
4dfb2df418f2
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changeset
|
5250 _workers->run_task(&proc_task_proxy); |
|
4dfb2df418f2
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changeset
|
5251 _g1h->set_par_threads(0); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5252 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5253 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5254 // Gang task for parallel reference enqueueing. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5255 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5256 class G1STWRefEnqueueTaskProxy: public AbstractGangTask { |
|
4dfb2df418f2
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changeset
|
5257 typedef AbstractRefProcTaskExecutor::EnqueueTask EnqueueTask; |
|
4dfb2df418f2
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changeset
|
5258 EnqueueTask& _enq_task; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5259 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5260 public: |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5261 G1STWRefEnqueueTaskProxy(EnqueueTask& enq_task) : |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5262 AbstractGangTask("Enqueue reference objects in parallel"), |
|
4dfb2df418f2
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diff
changeset
|
5263 _enq_task(enq_task) |
|
4dfb2df418f2
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parents:
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diff
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|
5264 { } |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5265 |
|
4728
441e946dc1af
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jmasa
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diff
changeset
|
5266 virtual void work(uint worker_id) { |
|
441e946dc1af
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jmasa
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diff
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|
5267 _enq_task.work(worker_id); |
|
3979
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parents:
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diff
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|
5268 } |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5269 }; |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5270 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5271 // Driver routine for parallel reference enqueing. |
|
4dfb2df418f2
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diff
changeset
|
5272 // Creates an instance of the ref enqueueing gang |
|
4dfb2df418f2
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diff
changeset
|
5273 // task and has the worker threads execute it. |
|
4dfb2df418f2
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diff
changeset
|
5274 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5275 void G1STWRefProcTaskExecutor::execute(EnqueueTask& enq_task) { |
|
4dfb2df418f2
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diff
changeset
|
5276 assert(_workers != NULL, "Need parallel worker threads."); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5277 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5278 G1STWRefEnqueueTaskProxy enq_task_proxy(enq_task); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5279 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5280 _g1h->set_par_threads(_active_workers); |
|
4dfb2df418f2
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diff
changeset
|
5281 _workers->run_task(&enq_task_proxy); |
|
4dfb2df418f2
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|
5282 _g1h->set_par_threads(0); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5283 } |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5284 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5285 // End of weak reference support closures |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5286 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5287 // Abstract task used to preserve (i.e. copy) any referent objects |
|
4dfb2df418f2
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diff
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|
5288 // that are in the collection set and are pointed to by reference |
|
4dfb2df418f2
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diff
changeset
|
5289 // objects discovered by the CM ref processor. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5290 |
|
4dfb2df418f2
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diff
changeset
|
5291 class G1ParPreserveCMReferentsTask: public AbstractGangTask { |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5292 protected: |
|
4dfb2df418f2
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diff
changeset
|
5293 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
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diff
changeset
|
5294 RefToScanQueueSet *_queues; |
|
4dfb2df418f2
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diff
changeset
|
5295 ParallelTaskTerminator _terminator; |
|
4728
441e946dc1af
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|
5296 uint _n_workers; |
|
3979
4dfb2df418f2
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diff
changeset
|
5297 |
|
4dfb2df418f2
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diff
changeset
|
5298 public: |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5299 G1ParPreserveCMReferentsTask(G1CollectedHeap* g1h,int workers, RefToScanQueueSet *task_queues) : |
|
4dfb2df418f2
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diff
changeset
|
5300 AbstractGangTask("ParPreserveCMReferents"), |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5301 _g1h(g1h), |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5302 _queues(task_queues), |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5303 _terminator(workers, _queues), |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5304 _n_workers(workers) |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5305 { } |
|
4dfb2df418f2
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diff
changeset
|
5306 |
|
4728
441e946dc1af
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4711
diff
changeset
|
5307 void work(uint worker_id) { |
|
3979
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diff
changeset
|
5308 ResourceMark rm; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5309 HandleMark hm; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5310 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
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diff
changeset
|
5311 G1ParScanThreadState pss(_g1h, worker_id); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
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changeset
|
5312 G1ParScanHeapEvacClosure scan_evac_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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changeset
|
5313 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
|
5314 G1ParScanPartialArrayClosure partial_scan_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5315 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5316 pss.set_evac_closure(&scan_evac_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5317 pss.set_evac_failure_closure(&evac_failure_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5318 pss.set_partial_scan_closure(&partial_scan_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5319 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5320 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
|
5321 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5322 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5323 G1ParScanExtRootClosure only_copy_non_heap_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5324 G1ParScanPermClosure only_copy_perm_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5325 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5326 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5327 G1ParScanAndMarkPermClosure copy_mark_perm_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5328 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5329 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5330 OopsInHeapRegionClosure* copy_perm_cl = &only_copy_perm_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5331 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5332 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5333 // We also need to mark copied objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5334 copy_non_heap_cl = ©_mark_non_heap_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5335 copy_perm_cl = ©_mark_perm_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5336 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5337 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5338 // Is alive closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5339 G1AlwaysAliveClosure always_alive(_g1h); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5340 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5341 // Copying keep alive closure. Applied to referent objects that need |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5342 // to be copied. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5343 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, copy_perm_cl, &pss); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5344 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5345 ReferenceProcessor* rp = _g1h->ref_processor_cm(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5346 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5347 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:
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diff
changeset
|
5348 uint stride = MIN2(MAX2(_n_workers, 1U), limit); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5349 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5350 // 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
|
5351 // So this must be true - but assert just in case someone decides to |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5352 // change the worker ids. |
|
4728
441e946dc1af
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jmasa
parents:
4711
diff
changeset
|
5353 assert(0 <= worker_id && worker_id < limit, "sanity"); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5354 assert(!rp->discovery_is_atomic(), "check this code"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5355 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5356 // 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
|
5357 for (uint idx = worker_id; idx < limit; idx += stride) { |
|
4014
bf2d2b8b1726
7095243: Disambiguate ReferenceProcessor::_discoveredSoftRefs
johnc
parents:
4013
diff
changeset
|
5358 DiscoveredList& ref_list = rp->discovered_refs()[idx]; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5359 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5360 DiscoveredListIterator iter(ref_list, &keep_alive, &always_alive); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5361 while (iter.has_next()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5362 // Since discovery is not atomic for the CM ref processor, we |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5363 // can see some null referent objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5364 iter.load_ptrs(DEBUG_ONLY(true)); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5365 oop ref = iter.obj(); |
|
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 // This will filter nulls. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5368 if (iter.is_referent_alive()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5369 iter.make_referent_alive(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5370 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5371 iter.move_to_next(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5372 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5373 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5374 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5375 // Drain the queue - which may cause stealing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5376 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _queues, &_terminator); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5377 drain_queue.do_void(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5378 // Allocation buffers were retired at the end of G1ParEvacuateFollowersClosure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5379 assert(pss.refs()->is_empty(), "should be"); |
|
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 }; |
|
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 // Weak Reference processing during an evacuation pause (part 1). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5384 void G1CollectedHeap::process_discovered_references() { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5385 double ref_proc_start = os::elapsedTime(); |
|
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 ReferenceProcessor* rp = _ref_processor_stw; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5388 assert(rp->discovery_enabled(), "should have been enabled"); |
|
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 // Any reference objects, in the collection set, that were 'discovered' |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5391 // by the CM ref processor should have already been copied (either by |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5392 // applying the external root copy closure to the discovered lists, or |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5393 // by following an RSet entry). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5394 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5395 // But some of the referents, that are in the collection set, that these |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5396 // reference objects point to may not have been copied: the STW ref |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5397 // processor would have seen that the reference object had already |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5398 // been 'discovered' and would have skipped discovering the reference, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5399 // but would not have treated the reference object as a regular oop. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5400 // As a reult the copy closure would not have been applied to the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5401 // referent object. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5402 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5403 // We need to explicitly copy these referent objects - the references |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5404 // will be processed at the end of remarking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5405 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5406 // We also need to do this copying before we process the reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5407 // objects discovered by the STW ref processor in case one of these |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5408 // referents points to another object which is also referenced by an |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5409 // object discovered by the STW ref processor. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5410 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5411 uint active_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5412 workers()->active_workers() : 1); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5413 |
| 4711 | 5414 assert(!G1CollectedHeap::use_parallel_gc_threads() || |
| 5415 active_workers == workers()->active_workers(), | |
| 5416 "Need to reset active_workers"); | |
| 5417 | |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5418 set_par_threads(active_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5419 G1ParPreserveCMReferentsTask keep_cm_referents(this, active_workers, _task_queues); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5420 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5421 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5422 workers()->run_task(&keep_cm_referents); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5423 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5424 keep_cm_referents.work(0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5425 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5426 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5427 set_par_threads(0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5428 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5429 // Closure to test whether a referent is alive. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5430 G1STWIsAliveClosure is_alive(this); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5431 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5432 // Even when parallel reference processing is enabled, the processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5433 // 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
|
5434 // 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
|
5435 // JNI refs. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5436 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5437 // Use only a single queue for this PSS. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5438 G1ParScanThreadState pss(this, 0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5439 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5440 // We do not embed a reference processor in the copying/scanning |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5441 // closures while we're actually processing the discovered |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5442 // reference objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5443 G1ParScanHeapEvacClosure scan_evac_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5444 G1ParScanHeapEvacFailureClosure evac_failure_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5445 G1ParScanPartialArrayClosure partial_scan_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5446 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5447 pss.set_evac_closure(&scan_evac_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5448 pss.set_evac_failure_closure(&evac_failure_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5449 pss.set_partial_scan_closure(&partial_scan_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5450 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5451 assert(pss.refs()->is_empty(), "pre-condition"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5452 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5453 G1ParScanExtRootClosure only_copy_non_heap_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5454 G1ParScanPermClosure only_copy_perm_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5455 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5456 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5457 G1ParScanAndMarkPermClosure copy_mark_perm_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5458 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5459 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5460 OopsInHeapRegionClosure* copy_perm_cl = &only_copy_perm_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5461 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5462 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5463 // We also need to mark copied objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5464 copy_non_heap_cl = ©_mark_non_heap_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5465 copy_perm_cl = ©_mark_perm_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5466 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5467 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5468 // Keep alive closure. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5469 G1CopyingKeepAliveClosure keep_alive(this, copy_non_heap_cl, copy_perm_cl, &pss); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5470 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5471 // Serial Complete GC closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5472 G1STWDrainQueueClosure drain_queue(this, &pss); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5473 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5474 // Setup the soft refs policy... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5475 rp->setup_policy(false); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5476 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5477 if (!rp->processing_is_mt()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5478 // Serial reference processing... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5479 rp->process_discovered_references(&is_alive, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5480 &keep_alive, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5481 &drain_queue, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5482 NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5483 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5484 // Parallel reference processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5485 assert(rp->num_q() == active_workers, "sanity"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5486 assert(active_workers <= rp->max_num_q(), "sanity"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5487 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5488 G1STWRefProcTaskExecutor par_task_executor(this, workers(), _task_queues, active_workers); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5489 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
|
5490 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5491 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5492 // We have completed copying any necessary live referent objects |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5493 // (that were not copied during the actual pause) so we can |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5494 // retire any active alloc buffers |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5495 pss.retire_alloc_buffers(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5496 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
|
5497 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5498 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
|
5499 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
|
5500 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5501 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5502 // Weak Reference processing during an evacuation pause (part 2). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5503 void G1CollectedHeap::enqueue_discovered_references() { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5504 double ref_enq_start = os::elapsedTime(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5505 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5506 ReferenceProcessor* rp = _ref_processor_stw; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5507 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
|
5508 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5509 // Now enqueue any remaining on the discovered lists on to |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5510 // the pending list. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5511 if (!rp->processing_is_mt()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5512 // Serial reference processing... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5513 rp->enqueue_discovered_references(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5514 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5515 // Parallel reference enqueuing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5516 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5517 uint active_workers = (ParallelGCThreads > 0 ? workers()->active_workers() : 1); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5518 assert(active_workers == workers()->active_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5519 "Need to reset active_workers"); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5520 assert(rp->num_q() == active_workers, "sanity"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5521 assert(active_workers <= rp->max_num_q(), "sanity"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5522 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5523 G1STWRefProcTaskExecutor par_task_executor(this, workers(), _task_queues, active_workers); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5524 rp->enqueue_discovered_references(&par_task_executor); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5525 } |
|
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 rp->verify_no_references_recorded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5528 assert(!rp->discovery_enabled(), "should have been disabled"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5529 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5530 // FIXME |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5531 // 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
|
5532 // 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
|
5533 // and could signicantly increase the pause time. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5534 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5535 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
|
5536 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
|
5537 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5538 |
| 342 | 5539 void G1CollectedHeap::evacuate_collection_set() { |
|
4781
bacb651cf5bf
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
4728
diff
changeset
|
5540 _expand_heap_after_alloc_failure = true; |
| 342 | 5541 set_evacuation_failed(false); |
| 5542 | |
| 5543 g1_rem_set()->prepare_for_oops_into_collection_set_do(); | |
| 5544 concurrent_g1_refine()->set_use_cache(false); | |
| 889 | 5545 concurrent_g1_refine()->clear_hot_cache_claimed_index(); |
| 5546 | |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5547 uint n_workers; |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5548 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5549 n_workers = |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5550 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5551 workers()->active_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5552 Threads::number_of_non_daemon_threads()); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5553 assert(UseDynamicNumberOfGCThreads || |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5554 n_workers == workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5555 "If not dynamic should be using all the workers"); |
| 4711 | 5556 workers()->set_active_workers(n_workers); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5557 set_par_threads(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5558 } else { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5559 assert(n_par_threads() == 0, |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5560 "Should be the original non-parallel value"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5561 n_workers = 1; |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5562 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5563 |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5564 G1ParTask g1_par_task(this, _task_queues); |
| 342 | 5565 |
| 5566 init_for_evac_failure(NULL); | |
| 5567 | |
| 5568 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
|
5569 |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5570 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
|
5571 double start_par_time_sec = os::elapsedTime(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5572 double end_par_time_sec; |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5573 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5574 { |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5575 StrongRootsScope srs(this); |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5576 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5577 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5578 // 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
|
5579 if (ParallelGCVerbose) G1ParScanThreadState::print_termination_stats_hdr(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5580 // These tasks use ShareHeap::_process_strong_tasks |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5581 assert(UseDynamicNumberOfGCThreads || |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5582 workers()->active_workers() == workers()->total_workers(), |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5583 "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
|
5584 workers()->run_task(&g1_par_task); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5585 } else { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5586 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
|
5587 g1_par_task.work(0); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5588 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5589 end_par_time_sec = os::elapsedTime(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5590 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5591 // 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
|
5592 // 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
|
5593 // 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
|
5594 // 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
|
5595 // reported parallel time. |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5596 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5597 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5598 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
|
5599 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
|
5600 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5601 double code_root_fixup_time_ms = |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5602 (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
|
5603 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
|
5604 |
| 342 | 5605 set_par_threads(0); |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5606 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5607 // Process any discovered reference objects - we have |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5608 // to do this _before_ we retire the GC alloc regions |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5609 // as we may have to copy some 'reachable' referent |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5610 // objects (and their reachable sub-graphs) that were |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5611 // not copied during the pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5612 process_discovered_references(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5613 |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5614 // Weak root processing. |
|
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5615 // 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
|
5616 // 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
|
5617 // here too. |
| 342 | 5618 { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5619 G1STWIsAliveClosure is_alive(this); |
| 342 | 5620 G1KeepAliveClosure keep_alive(this); |
| 5621 JNIHandles::weak_oops_do(&is_alive, &keep_alive); | |
| 5622 } | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5623 |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
5624 release_gc_alloc_regions(); |
| 342 | 5625 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
|
5626 |
| 889 | 5627 concurrent_g1_refine()->clear_hot_cache(); |
| 342 | 5628 concurrent_g1_refine()->set_use_cache(true); |
| 5629 | |
| 5630 finalize_for_evac_failure(); | |
| 5631 | |
| 5632 if (evacuation_failed()) { | |
| 5633 remove_self_forwarding_pointers(); | |
|
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
5634 if (G1Log::finer()) { |
| 6059 | 5635 gclog_or_tty->print(" (to-space exhausted)"); |
|
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
5636 } else if (G1Log::fine()) { |
| 342 | 5637 gclog_or_tty->print("--"); |
| 5638 } | |
| 5639 } | |
| 5640 | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5641 // Enqueue any remaining references remaining on the STW |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5642 // reference processor's discovered lists. We need to do |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5643 // this after the card table is cleaned (and verified) as |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5644 // the act of enqueuing entries on to the pending list |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5645 // will log these updates (and dirty their associated |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5646 // cards). We need these updates logged to update any |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5647 // RSets. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5648 enqueue_discovered_references(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5649 |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5650 if (G1DeferredRSUpdate) { |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5651 RedirtyLoggedCardTableEntryFastClosure redirty; |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5652 dirty_card_queue_set().set_closure(&redirty); |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5653 dirty_card_queue_set().apply_closure_to_all_completed_buffers(); |
| 1111 | 5654 |
| 5655 DirtyCardQueueSet& dcq = JavaThread::dirty_card_queue_set(); | |
| 5656 dcq.merge_bufferlists(&dirty_card_queue_set()); | |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5657 assert(dirty_card_queue_set().completed_buffers_num() == 0, "All should be consumed"); |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5658 } |
| 342 | 5659 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
| 5660 } | |
| 5661 | |
| 2173 | 5662 void G1CollectedHeap::free_region_if_empty(HeapRegion* hr, |
| 2152 | 5663 size_t* pre_used, |
| 5664 FreeRegionList* free_list, | |
| 4072 | 5665 OldRegionSet* old_proxy_set, |
| 2152 | 5666 HumongousRegionSet* humongous_proxy_set, |
| 2173 | 5667 HRRSCleanupTask* hrrs_cleanup_task, |
| 2152 | 5668 bool par) { |
| 5669 if (hr->used() > 0 && hr->max_live_bytes() == 0 && !hr->is_young()) { | |
| 5670 if (hr->isHumongous()) { | |
| 5671 assert(hr->startsHumongous(), "we should only see starts humongous"); | |
| 5672 free_humongous_region(hr, pre_used, free_list, humongous_proxy_set, par); | |
| 5673 } else { | |
| 4072 | 5674 _old_set.remove_with_proxy(hr, old_proxy_set); |
| 2152 | 5675 free_region(hr, pre_used, free_list, par); |
| 342 | 5676 } |
| 2173 | 5677 } else { |
| 5678 hr->rem_set()->do_cleanup_work(hrrs_cleanup_task); | |
| 342 | 5679 } |
| 5680 } | |
| 5681 | |
| 2152 | 5682 void G1CollectedHeap::free_region(HeapRegion* hr, |
| 5683 size_t* pre_used, | |
| 5684 FreeRegionList* free_list, | |
| 5685 bool par) { | |
| 5686 assert(!hr->isHumongous(), "this is only for non-humongous regions"); | |
| 5687 assert(!hr->is_empty(), "the region should not be empty"); | |
| 5688 assert(free_list != NULL, "pre-condition"); | |
| 5689 | |
| 5690 *pre_used += hr->used(); | |
| 5691 hr->hr_clear(par, true /* clear_space */); | |
|
2432
455328d90876
7029458: G1: Add newly-reclaimed regions to the beginning of the region free list, not the end
tonyp
parents:
2369
diff
changeset
|
5692 free_list->add_as_head(hr); |
| 2152 | 5693 } |
| 5694 | |
| 5695 void G1CollectedHeap::free_humongous_region(HeapRegion* hr, | |
| 5696 size_t* pre_used, | |
| 5697 FreeRegionList* free_list, | |
| 5698 HumongousRegionSet* humongous_proxy_set, | |
| 5699 bool par) { | |
| 5700 assert(hr->startsHumongous(), "this is only for starts humongous regions"); | |
| 5701 assert(free_list != NULL, "pre-condition"); | |
| 5702 assert(humongous_proxy_set != NULL, "pre-condition"); | |
| 5703 | |
| 5704 size_t hr_used = hr->used(); | |
| 5705 size_t hr_capacity = hr->capacity(); | |
| 5706 size_t hr_pre_used = 0; | |
| 5707 _humongous_set.remove_with_proxy(hr, humongous_proxy_set); | |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5708 // We need to read this before we make the region non-humongous, |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5709 // otherwise the information will be gone. |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5710 uint last_index = hr->last_hc_index(); |
| 2152 | 5711 hr->set_notHumongous(); |
| 5712 free_region(hr, &hr_pre_used, free_list, par); | |
| 5713 | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
5714 uint i = hr->hrs_index() + 1; |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5715 while (i < last_index) { |
| 3766 | 5716 HeapRegion* curr_hr = region_at(i); |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5717 assert(curr_hr->continuesHumongous(), "invariant"); |
| 2152 | 5718 curr_hr->set_notHumongous(); |
| 5719 free_region(curr_hr, &hr_pre_used, free_list, par); | |
| 5720 i += 1; | |
| 5721 } | |
| 5722 assert(hr_pre_used == hr_used, | |
| 5723 err_msg("hr_pre_used: "SIZE_FORMAT" and hr_used: "SIZE_FORMAT" " | |
| 5724 "should be the same", hr_pre_used, hr_used)); | |
| 5725 *pre_used += hr_pre_used; | |
| 5726 } | |
| 5727 | |
| 5728 void G1CollectedHeap::update_sets_after_freeing_regions(size_t pre_used, | |
| 5729 FreeRegionList* free_list, | |
| 4072 | 5730 OldRegionSet* old_proxy_set, |
| 2152 | 5731 HumongousRegionSet* humongous_proxy_set, |
| 5732 bool par) { | |
| 5733 if (pre_used > 0) { | |
| 5734 Mutex* lock = (par) ? ParGCRareEvent_lock : NULL; | |
| 342 | 5735 MutexLockerEx x(lock, Mutex::_no_safepoint_check_flag); |
| 2152 | 5736 assert(_summary_bytes_used >= pre_used, |
| 5737 err_msg("invariant: _summary_bytes_used: "SIZE_FORMAT" " | |
| 5738 "should be >= pre_used: "SIZE_FORMAT, | |
| 5739 _summary_bytes_used, pre_used)); | |
| 342 | 5740 _summary_bytes_used -= pre_used; |
| 2152 | 5741 } |
| 5742 if (free_list != NULL && !free_list->is_empty()) { | |
| 5743 MutexLockerEx x(FreeList_lock, Mutex::_no_safepoint_check_flag); | |
|
2432
455328d90876
7029458: G1: Add newly-reclaimed regions to the beginning of the region free list, not the end
tonyp
parents:
2369
diff
changeset
|
5744 _free_list.add_as_head(free_list); |
| 2152 | 5745 } |
| 4072 | 5746 if (old_proxy_set != NULL && !old_proxy_set->is_empty()) { |
| 5747 MutexLockerEx x(OldSets_lock, Mutex::_no_safepoint_check_flag); | |
| 5748 _old_set.update_from_proxy(old_proxy_set); | |
| 5749 } | |
| 2152 | 5750 if (humongous_proxy_set != NULL && !humongous_proxy_set->is_empty()) { |
| 5751 MutexLockerEx x(OldSets_lock, Mutex::_no_safepoint_check_flag); | |
| 5752 _humongous_set.update_from_proxy(humongous_proxy_set); | |
| 342 | 5753 } |
| 5754 } | |
| 5755 | |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5756 class G1ParCleanupCTTask : public AbstractGangTask { |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5757 CardTableModRefBS* _ct_bs; |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5758 G1CollectedHeap* _g1h; |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
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|
5759 HeapRegion* volatile _su_head; |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
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diff
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|
5760 public: |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
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794
diff
changeset
|
5761 G1ParCleanupCTTask(CardTableModRefBS* ct_bs, |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
diff
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|
5762 G1CollectedHeap* g1h) : |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
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794
diff
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|
5763 AbstractGangTask("G1 Par Cleanup CT Task"), |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
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3824
diff
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|
5764 _ct_bs(ct_bs), _g1h(g1h) { } |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
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794
diff
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|
5765 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5766 void work(uint worker_id) { |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
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794
diff
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|
5767 HeapRegion* r; |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
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diff
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|
5768 while (r = _g1h->pop_dirty_cards_region()) { |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5769 clear_cards(r); |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5770 } |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
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diff
changeset
|
5771 } |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
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936
diff
changeset
|
5772 |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5773 void clear_cards(HeapRegion* r) { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
diff
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|
5774 // Cards of the survivors should have already been dirtied. |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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parents:
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|
5775 if (!r->is_survivor()) { |
|
796
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6819065: G1: eliminate high serial card table clearing time
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diff
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|
5776 _ct_bs->clear(MemRegion(r->bottom(), r->end())); |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
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parents:
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diff
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|
5777 } |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
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794
diff
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|
5778 } |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5779 }; |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
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diff
changeset
|
5780 |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5781 #ifndef PRODUCT |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
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diff
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|
5782 class G1VerifyCardTableCleanup: public HeapRegionClosure { |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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3293
diff
changeset
|
5783 G1CollectedHeap* _g1h; |
|
940
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6841313: G1: dirty cards of survivor regions in parallel
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|
5784 CardTableModRefBS* _ct_bs; |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
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diff
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|
5785 public: |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
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3293
diff
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|
5786 G1VerifyCardTableCleanup(G1CollectedHeap* g1h, CardTableModRefBS* ct_bs) |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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|
5787 : _g1h(g1h), _ct_bs(ct_bs) { } |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
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2432
diff
changeset
|
5788 virtual bool doHeapRegion(HeapRegion* r) { |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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parents:
1391
diff
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|
5789 if (r->is_survivor()) { |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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parents:
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diff
changeset
|
5790 _g1h->verify_dirty_region(r); |
|
940
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6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
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diff
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|
5791 } else { |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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parents:
3293
diff
changeset
|
5792 _g1h->verify_not_dirty_region(r); |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
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parents:
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diff
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|
5793 } |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
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diff
changeset
|
5794 return false; |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5795 } |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
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936
diff
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|
5796 }; |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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diff
changeset
|
5797 |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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parents:
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diff
changeset
|
5798 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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diff
changeset
|
5799 // All of the region should be clean. |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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3293
diff
changeset
|
5800 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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diff
changeset
|
5801 MemRegion mr(hr->bottom(), hr->end()); |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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parents:
3293
diff
changeset
|
5802 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
|
5803 } |
|
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
|
5804 |
|
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
|
5805 void G1CollectedHeap::verify_dirty_region(HeapRegion* hr) { |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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parents:
3293
diff
changeset
|
5806 // 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
|
5807 // 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
|
5808 // 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
|
5809 // 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
|
5810 // 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
|
5811 // 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
|
5812 // is dirty. |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5813 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
|
5814 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
|
5815 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
|
5816 } |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5817 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
5818 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
|
5819 CardTableModRefBS* ct_bs = (CardTableModRefBS*) barrier_set(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
5820 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
|
5821 verify_dirty_region(hr); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
5822 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
5823 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
5824 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
5825 void G1CollectedHeap::verify_dirty_young_regions() { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
5826 verify_dirty_young_list(_young_list->first_region()); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
5827 } |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5828 #endif |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5829 |
| 342 | 5830 void G1CollectedHeap::cleanUpCardTable() { |
| 5831 CardTableModRefBS* ct_bs = (CardTableModRefBS*) (barrier_set()); | |
| 5832 double start = os::elapsedTime(); | |
| 5833 | |
| 4023 | 5834 { |
| 5835 // Iterate over the dirty cards region list. | |
| 5836 G1ParCleanupCTTask cleanup_task(ct_bs, this); | |
| 5837 | |
| 4711 | 5838 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 5839 set_par_threads(); | |
| 4023 | 5840 workers()->run_task(&cleanup_task); |
| 5841 set_par_threads(0); | |
| 5842 } else { | |
| 5843 while (_dirty_cards_region_list) { | |
| 5844 HeapRegion* r = _dirty_cards_region_list; | |
| 5845 cleanup_task.clear_cards(r); | |
| 5846 _dirty_cards_region_list = r->get_next_dirty_cards_region(); | |
| 5847 if (_dirty_cards_region_list == r) { | |
| 5848 // The last region. | |
| 5849 _dirty_cards_region_list = NULL; | |
| 5850 } | |
| 5851 r->set_next_dirty_cards_region(NULL); | |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
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|
5852 } |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5853 } |
| 4023 | 5854 #ifndef PRODUCT |
| 5855 if (G1VerifyCTCleanup || VerifyAfterGC) { | |
| 5856 G1VerifyCardTableCleanup cleanup_verifier(this, ct_bs); | |
| 5857 heap_region_iterate(&cleanup_verifier); | |
| 5858 } | |
| 5859 #endif | |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5860 } |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
5861 |
| 342 | 5862 double elapsed = os::elapsedTime() - start; |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5863 g1_policy()->phase_times()->record_clear_ct_time(elapsed * 1000.0); |
| 342 | 5864 } |
| 5865 | |
| 5866 void G1CollectedHeap::free_collection_set(HeapRegion* cs_head) { | |
| 2152 | 5867 size_t pre_used = 0; |
| 5868 FreeRegionList local_free_list("Local List for CSet Freeing"); | |
| 5869 | |
| 342 | 5870 double young_time_ms = 0.0; |
| 5871 double non_young_time_ms = 0.0; | |
| 5872 | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
5873 // Since the collection set is a superset of the the young list, |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
5874 // all we need to do to clear the young list is clear its |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
5875 // head and length, and unlink any young regions in the code below |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
5876 _young_list->clear(); |
|
1316cec51b4d
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parents:
1391
diff
changeset
|
5877 |
| 342 | 5878 G1CollectorPolicy* policy = g1_policy(); |
| 5879 | |
| 5880 double start_sec = os::elapsedTime(); | |
| 5881 bool non_young = true; | |
| 5882 | |
| 5883 HeapRegion* cur = cs_head; | |
| 5884 int age_bound = -1; | |
| 5885 size_t rs_lengths = 0; | |
| 5886 | |
| 5887 while (cur != NULL) { | |
| 2361 | 5888 assert(!is_on_master_free_list(cur), "sanity"); |
| 342 | 5889 if (non_young) { |
| 5890 if (cur->is_young()) { | |
| 5891 double end_sec = os::elapsedTime(); | |
| 5892 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
| 5893 non_young_time_ms += elapsed_ms; | |
| 5894 | |
| 5895 start_sec = os::elapsedTime(); | |
| 5896 non_young = false; | |
| 5897 } | |
| 5898 } else { | |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
5899 if (!cur->is_young()) { |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
5900 double end_sec = os::elapsedTime(); |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
5901 double elapsed_ms = (end_sec - start_sec) * 1000.0; |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
5902 young_time_ms += elapsed_ms; |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
5903 |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
5904 start_sec = os::elapsedTime(); |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
5905 non_young = true; |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
5906 } |
| 342 | 5907 } |
| 5908 | |
| 5909 rs_lengths += cur->rem_set()->occupied(); | |
| 5910 | |
| 5911 HeapRegion* next = cur->next_in_collection_set(); | |
| 5912 assert(cur->in_collection_set(), "bad CS"); | |
| 5913 cur->set_next_in_collection_set(NULL); | |
| 5914 cur->set_in_collection_set(false); | |
| 5915 | |
| 5916 if (cur->is_young()) { | |
| 5917 int index = cur->young_index_in_cset(); | |
|
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4073
diff
changeset
|
5918 assert(index != -1, "invariant"); |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
5919 assert((uint) index < policy->young_cset_region_length(), "invariant"); |
| 342 | 5920 size_t words_survived = _surviving_young_words[index]; |
| 5921 cur->record_surv_words_in_group(words_survived); | |
|
1394
1316cec51b4d
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parents:
1391
diff
changeset
|
5922 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
5923 // At this point the we have 'popped' cur from the collection set |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
5924 // (linked via next_in_collection_set()) but it is still in the |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
5925 // young list (linked via next_young_region()). Clear the |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
5926 // _next_young_region field. |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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1391
diff
changeset
|
5927 cur->set_next_young_region(NULL); |
| 342 | 5928 } else { |
| 5929 int index = cur->young_index_in_cset(); | |
|
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
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4073
diff
changeset
|
5930 assert(index == -1, "invariant"); |
| 342 | 5931 } |
| 5932 | |
| 5933 assert( (cur->is_young() && cur->young_index_in_cset() > -1) || | |
| 5934 (!cur->is_young() && cur->young_index_in_cset() == -1), | |
| 5935 "invariant" ); | |
| 5936 | |
| 5937 if (!cur->evacuation_failed()) { | |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
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diff
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|
5938 MemRegion used_mr = cur->used_region(); |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
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diff
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|
5939 |
| 342 | 5940 // And the region is empty. |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
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4095
diff
changeset
|
5941 assert(!used_mr.is_empty(), "Should not have empty regions in a CS."); |
| 2152 | 5942 free_region(cur, &pre_used, &local_free_list, false /* par */); |
| 342 | 5943 } else { |
| 5944 cur->uninstall_surv_rate_group(); | |
|
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a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
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|
5945 if (cur->is_young()) { |
| 342 | 5946 cur->set_young_index_in_cset(-1); |
|
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a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
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diff
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|
5947 } |
| 342 | 5948 cur->set_not_young(); |
| 5949 cur->set_evacuation_failed(false); | |
| 4072 | 5950 // The region is now considered to be old. |
| 5951 _old_set.add(cur); | |
| 342 | 5952 } |
| 5953 cur = next; | |
| 5954 } | |
| 5955 | |
| 5956 policy->record_max_rs_lengths(rs_lengths); | |
| 5957 policy->cset_regions_freed(); | |
| 5958 | |
| 5959 double end_sec = os::elapsedTime(); | |
| 5960 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
5961 |
|
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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diff
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|
5962 if (non_young) { |
| 342 | 5963 non_young_time_ms += elapsed_ms; |
|
4097
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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diff
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|
5964 } else { |
| 342 | 5965 young_time_ms += elapsed_ms; |
|
4097
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
5966 } |
| 342 | 5967 |
| 2152 | 5968 update_sets_after_freeing_regions(pre_used, &local_free_list, |
| 4072 | 5969 NULL /* old_proxy_set */, |
| 2152 | 5970 NULL /* humongous_proxy_set */, |
| 5971 false /* par */); | |
|
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
|
5972 policy->phase_times()->record_young_free_cset_time_ms(young_time_ms); |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
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diff
changeset
|
5973 policy->phase_times()->record_non_young_free_cset_time_ms(non_young_time_ms); |
| 342 | 5974 } |
| 5975 | |
|
1394
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
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|
5976 // This routine is similar to the above but does not record |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
changeset
|
5977 // any policy statistics or update free lists; we are abandoning |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
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|
5978 // the current incremental collection set in preparation of a |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
changeset
|
5979 // full collection. After the full GC we will start to build up |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
changeset
|
5980 // the incremental collection set again. |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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1391
diff
changeset
|
5981 // This is only called when we're doing a full collection |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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1391
diff
changeset
|
5982 // and is immediately followed by the tearing down of the young list. |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
changeset
|
5983 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
changeset
|
5984 void G1CollectedHeap::abandon_collection_set(HeapRegion* cs_head) { |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
5985 HeapRegion* cur = cs_head; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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1391
diff
changeset
|
5986 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
changeset
|
5987 while (cur != NULL) { |
|
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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diff
changeset
|
5988 HeapRegion* next = cur->next_in_collection_set(); |
|
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
changeset
|
5989 assert(cur->in_collection_set(), "bad CS"); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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parents:
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diff
changeset
|
5990 cur->set_next_in_collection_set(NULL); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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parents:
1391
diff
changeset
|
5991 cur->set_in_collection_set(false); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
changeset
|
5992 cur->set_young_index_in_cset(-1); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
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|
5993 cur = next; |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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diff
changeset
|
5994 } |
|
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diff
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|
5995 } |
|
1316cec51b4d
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diff
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|
5996 |
| 2152 | 5997 void G1CollectedHeap::set_free_regions_coming() { |
| 5998 if (G1ConcRegionFreeingVerbose) { | |
| 5999 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
| 6000 "setting free regions coming"); | |
| 6001 } | |
| 6002 | |
| 6003 assert(!free_regions_coming(), "pre-condition"); | |
| 6004 _free_regions_coming = true; | |
| 342 | 6005 } |
| 6006 | |
| 2152 | 6007 void G1CollectedHeap::reset_free_regions_coming() { |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
6008 assert(free_regions_coming(), "pre-condition"); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
6009 |
| 2152 | 6010 { |
| 6011 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
| 6012 _free_regions_coming = false; | |
| 6013 SecondaryFreeList_lock->notify_all(); | |
| 6014 } | |
| 6015 | |
| 6016 if (G1ConcRegionFreeingVerbose) { | |
| 6017 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
| 6018 "reset free regions coming"); | |
| 342 | 6019 } |
| 6020 } | |
| 6021 | |
| 2152 | 6022 void G1CollectedHeap::wait_while_free_regions_coming() { |
| 6023 // Most of the time we won't have to wait, so let's do a quick test | |
| 6024 // first before we take the lock. | |
| 6025 if (!free_regions_coming()) { | |
| 6026 return; | |
| 6027 } | |
| 6028 | |
| 6029 if (G1ConcRegionFreeingVerbose) { | |
| 6030 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
| 6031 "waiting for free regions"); | |
| 342 | 6032 } |
| 6033 | |
| 6034 { | |
| 2152 | 6035 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
| 6036 while (free_regions_coming()) { | |
| 6037 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
| 342 | 6038 } |
| 2152 | 6039 } |
| 6040 | |
| 6041 if (G1ConcRegionFreeingVerbose) { | |
| 6042 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
| 6043 "done waiting for free regions"); | |
| 6044 } | |
| 342 | 6045 } |
| 6046 | |
| 6047 void G1CollectedHeap::set_region_short_lived_locked(HeapRegion* hr) { | |
| 6048 assert(heap_lock_held_for_gc(), | |
| 6049 "the heap lock should already be held by or for this thread"); | |
| 6050 _young_list->push_region(hr); | |
| 6051 } | |
| 6052 | |
| 6053 class NoYoungRegionsClosure: public HeapRegionClosure { | |
| 6054 private: | |
| 6055 bool _success; | |
| 6056 public: | |
| 6057 NoYoungRegionsClosure() : _success(true) { } | |
| 6058 bool doHeapRegion(HeapRegion* r) { | |
| 6059 if (r->is_young()) { | |
| 6060 gclog_or_tty->print_cr("Region ["PTR_FORMAT", "PTR_FORMAT") tagged as young", | |
| 6061 r->bottom(), r->end()); | |
| 6062 _success = false; | |
| 6063 } | |
| 6064 return false; | |
| 6065 } | |
| 6066 bool success() { return _success; } | |
| 6067 }; | |
| 6068 | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6069 bool G1CollectedHeap::check_young_list_empty(bool check_heap, bool check_sample) { |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6070 bool ret = _young_list->check_list_empty(check_sample); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6071 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6072 if (check_heap) { |
| 342 | 6073 NoYoungRegionsClosure closure; |
| 6074 heap_region_iterate(&closure); | |
| 6075 ret = ret && closure.success(); | |
| 6076 } | |
| 6077 | |
| 6078 return ret; | |
| 6079 } | |
| 6080 | |
| 4072 | 6081 class TearDownRegionSetsClosure : public HeapRegionClosure { |
| 6082 private: | |
| 6083 OldRegionSet *_old_set; | |
| 2152 | 6084 |
| 342 | 6085 public: |
| 4072 | 6086 TearDownRegionSetsClosure(OldRegionSet* old_set) : _old_set(old_set) { } |
| 2152 | 6087 |
| 342 | 6088 bool doHeapRegion(HeapRegion* r) { |
| 4072 | 6089 if (r->is_empty()) { |
| 6090 // We ignore empty regions, we'll empty the free list afterwards | |
| 6091 } else if (r->is_young()) { | |
| 6092 // We ignore young regions, we'll empty the young list afterwards | |
| 6093 } else if (r->isHumongous()) { | |
| 6094 // We ignore humongous regions, we're not tearing down the | |
| 6095 // humongous region set | |
| 342 | 6096 } else { |
| 4072 | 6097 // The rest should be old |
| 6098 _old_set->remove(r); | |
| 342 | 6099 } |
| 6100 return false; | |
| 6101 } | |
| 6102 | |
| 4072 | 6103 ~TearDownRegionSetsClosure() { |
| 6104 assert(_old_set->is_empty(), "post-condition"); | |
| 2152 | 6105 } |
| 342 | 6106 }; |
| 6107 | |
| 4072 | 6108 void G1CollectedHeap::tear_down_region_sets(bool free_list_only) { |
| 6109 assert_at_safepoint(true /* should_be_vm_thread */); | |
| 6110 | |
| 6111 if (!free_list_only) { | |
| 6112 TearDownRegionSetsClosure cl(&_old_set); | |
| 6113 heap_region_iterate(&cl); | |
| 6114 | |
| 6115 // Need to do this after the heap iteration to be able to | |
| 6116 // recognize the young regions and ignore them during the iteration. | |
| 6117 _young_list->empty_list(); | |
| 6118 } | |
| 6119 _free_list.remove_all(); | |
| 6120 } | |
| 6121 | |
| 6122 class RebuildRegionSetsClosure : public HeapRegionClosure { | |
| 6123 private: | |
| 6124 bool _free_list_only; | |
| 6125 OldRegionSet* _old_set; | |
| 6126 FreeRegionList* _free_list; | |
| 6127 size_t _total_used; | |
| 6128 | |
| 6129 public: | |
| 6130 RebuildRegionSetsClosure(bool free_list_only, | |
| 6131 OldRegionSet* old_set, FreeRegionList* free_list) : | |
| 6132 _free_list_only(free_list_only), | |
| 6133 _old_set(old_set), _free_list(free_list), _total_used(0) { | |
| 6134 assert(_free_list->is_empty(), "pre-condition"); | |
| 6135 if (!free_list_only) { | |
| 6136 assert(_old_set->is_empty(), "pre-condition"); | |
| 6137 } | |
| 6138 } | |
| 6139 | |
| 6140 bool doHeapRegion(HeapRegion* r) { | |
| 6141 if (r->continuesHumongous()) { | |
| 6142 return false; | |
| 6143 } | |
| 6144 | |
| 6145 if (r->is_empty()) { | |
| 6146 // Add free regions to the free list | |
| 6147 _free_list->add_as_tail(r); | |
| 6148 } else if (!_free_list_only) { | |
| 6149 assert(!r->is_young(), "we should not come across young regions"); | |
| 6150 | |
| 6151 if (r->isHumongous()) { | |
| 6152 // We ignore humongous regions, we left the humongous set unchanged | |
| 6153 } else { | |
| 6154 // The rest should be old, add them to the old set | |
| 6155 _old_set->add(r); | |
| 6156 } | |
| 6157 _total_used += r->used(); | |
| 6158 } | |
| 6159 | |
| 6160 return false; | |
| 6161 } | |
| 6162 | |
| 6163 size_t total_used() { | |
| 6164 return _total_used; | |
| 6165 } | |
| 6166 }; | |
| 6167 | |
| 6168 void G1CollectedHeap::rebuild_region_sets(bool free_list_only) { | |
| 6169 assert_at_safepoint(true /* should_be_vm_thread */); | |
| 6170 | |
| 6171 RebuildRegionSetsClosure cl(free_list_only, &_old_set, &_free_list); | |
| 6172 heap_region_iterate(&cl); | |
| 6173 | |
| 6174 if (!free_list_only) { | |
| 6175 _summary_bytes_used = cl.total_used(); | |
| 6176 } | |
| 6177 assert(_summary_bytes_used == recalculate_used(), | |
| 6178 err_msg("inconsistent _summary_bytes_used, " | |
| 6179 "value: "SIZE_FORMAT" recalculated: "SIZE_FORMAT, | |
| 6180 _summary_bytes_used, recalculate_used())); | |
| 342 | 6181 } |
| 6182 | |
| 6183 void G1CollectedHeap::set_refine_cte_cl_concurrency(bool concurrent) { | |
| 6184 _refine_cte_cl->set_concurrent(concurrent); | |
| 6185 } | |
| 6186 | |
| 6187 bool G1CollectedHeap::is_in_closed_subset(const void* p) const { | |
| 6188 HeapRegion* hr = heap_region_containing(p); | |
| 6189 if (hr == NULL) { | |
| 6190 return is_in_permanent(p); | |
| 6191 } else { | |
| 6192 return hr->is_in(p); | |
| 6193 } | |
| 6194 } | |
| 2152 | 6195 |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6196 // Methods for the mutator alloc region |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6197 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
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2432
diff
changeset
|
6198 HeapRegion* G1CollectedHeap::new_mutator_alloc_region(size_t word_size, |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6199 bool force) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6200 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6201 assert(!force || g1_policy()->can_expand_young_list(), |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6202 "if force is true we should be able to expand the young list"); |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6203 bool young_list_full = g1_policy()->is_young_list_full(); |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6204 if (force || !young_list_full) { |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6205 HeapRegion* new_alloc_region = new_region(word_size, |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6206 false /* do_expand */); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6207 if (new_alloc_region != NULL) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6208 set_region_short_lived_locked(new_alloc_region); |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6209 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Eden, young_list_full); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6210 return new_alloc_region; |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6211 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6212 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6213 return NULL; |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6214 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6215 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6216 void G1CollectedHeap::retire_mutator_alloc_region(HeapRegion* alloc_region, |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6217 size_t allocated_bytes) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6218 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
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2432
diff
changeset
|
6219 assert(alloc_region->is_young(), "all mutator alloc regions should be young"); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6220 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
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2432
diff
changeset
|
6221 g1_policy()->add_region_to_incremental_cset_lhs(alloc_region); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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diff
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|
6222 _summary_bytes_used += allocated_bytes; |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6223 _hr_printer.retire(alloc_region); |
|
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6224 // We update the eden sizes here, when the region is retired, |
|
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6225 // instead of when it's allocated, since this is the point that its |
|
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
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diff
changeset
|
6226 // used space has been recored in _summary_bytes_used. |
|
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
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diff
changeset
|
6227 g1mm()->update_eden_size(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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diff
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|
6228 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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diff
changeset
|
6229 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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changeset
|
6230 HeapRegion* MutatorAllocRegion::allocate_new_region(size_t word_size, |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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|
6231 bool force) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
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diff
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|
6232 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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|
6233 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
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diff
changeset
|
6234 |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6235 void G1CollectedHeap::set_par_threads() { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6236 // Don't change the number of workers. Use the value previously set |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6237 // in the workgroup. |
| 4711 | 6238 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
|
6239 uint n_workers = workers()->active_workers(); |
| 4711 | 6240 assert(UseDynamicNumberOfGCThreads || |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6241 n_workers == workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6242 "Otherwise should be using the total number of workers"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6243 if (n_workers == 0) { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6244 assert(false, "Should have been set in prior evacuation pause."); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6245 n_workers = ParallelGCThreads; |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6246 workers()->set_active_workers(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
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|
6247 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
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diff
changeset
|
6248 set_par_threads(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
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|
6249 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
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diff
changeset
|
6250 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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|
6251 void MutatorAllocRegion::retire_region(HeapRegion* alloc_region, |
|
abdfc822206f
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|
6252 size_t allocated_bytes) { |
|
abdfc822206f
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changeset
|
6253 _g1h->retire_mutator_alloc_region(alloc_region, allocated_bytes); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
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|
6254 } |
|
abdfc822206f
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parents:
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diff
changeset
|
6255 |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6256 // Methods for the GC alloc regions |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
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3824
diff
changeset
|
6257 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
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diff
changeset
|
6258 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
|
6259 uint count, |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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parents:
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diff
changeset
|
6260 GCAllocPurpose ap) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
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diff
changeset
|
6261 assert(FreeList_lock->owned_by_self(), "pre-condition"); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6262 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6263 if (count < g1_policy()->max_regions(ap)) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6264 HeapRegion* new_alloc_region = new_region(word_size, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6265 true /* do_expand */); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6266 if (new_alloc_region != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6267 // We really only need to do this for old regions given that we |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6268 // should never scan survivors. But it doesn't hurt to do it |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6269 // for survivors too. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6270 new_alloc_region->set_saved_mark(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6271 if (ap == GCAllocForSurvived) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6272 new_alloc_region->set_survivor(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6273 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Survivor); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6274 } else { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6275 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Old); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6276 } |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
6277 bool during_im = g1_policy()->during_initial_mark_pause(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
6278 new_alloc_region->note_start_of_copying(during_im); |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6279 return new_alloc_region; |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6280 } else { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6281 g1_policy()->note_alloc_region_limit_reached(ap); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6282 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6283 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6284 return NULL; |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6285 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6286 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6287 void G1CollectedHeap::retire_gc_alloc_region(HeapRegion* alloc_region, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6288 size_t allocated_bytes, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6289 GCAllocPurpose ap) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
6290 bool during_im = g1_policy()->during_initial_mark_pause(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
6291 alloc_region->note_end_of_copying(during_im); |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6292 g1_policy()->record_bytes_copied_during_gc(allocated_bytes); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6293 if (ap == GCAllocForSurvived) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6294 young_list()->add_survivor_region(alloc_region); |
| 4072 | 6295 } else { |
| 6296 _old_set.add(alloc_region); | |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6297 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6298 _hr_printer.retire(alloc_region); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6299 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6300 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6301 HeapRegion* SurvivorGCAllocRegion::allocate_new_region(size_t word_size, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6302 bool force) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6303 assert(!force, "not supported for GC alloc regions"); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6304 return _g1h->new_gc_alloc_region(word_size, count(), GCAllocForSurvived); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6305 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6306 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6307 void SurvivorGCAllocRegion::retire_region(HeapRegion* alloc_region, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6308 size_t allocated_bytes) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6309 _g1h->retire_gc_alloc_region(alloc_region, allocated_bytes, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6310 GCAllocForSurvived); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6311 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6312 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6313 HeapRegion* OldGCAllocRegion::allocate_new_region(size_t word_size, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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parents:
3824
diff
changeset
|
6314 bool force) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6315 assert(!force, "not supported for GC alloc regions"); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6316 return _g1h->new_gc_alloc_region(word_size, count(), GCAllocForTenured); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
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diff
changeset
|
6317 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
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3824
diff
changeset
|
6318 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
diff
changeset
|
6319 void OldGCAllocRegion::retire_region(HeapRegion* alloc_region, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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diff
changeset
|
6320 size_t allocated_bytes) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
diff
changeset
|
6321 _g1h->retire_gc_alloc_region(alloc_region, allocated_bytes, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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diff
changeset
|
6322 GCAllocForTenured); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
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3824
diff
changeset
|
6323 } |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6324 // Heap region set verification |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6325 |
| 2152 | 6326 class VerifyRegionListsClosure : public HeapRegionClosure { |
| 6327 private: | |
| 4072 | 6328 FreeRegionList* _free_list; |
| 6329 OldRegionSet* _old_set; | |
| 2152 | 6330 HumongousRegionSet* _humongous_set; |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
6331 uint _region_count; |
| 2152 | 6332 |
| 6333 public: | |
| 4072 | 6334 VerifyRegionListsClosure(OldRegionSet* old_set, |
| 6335 HumongousRegionSet* humongous_set, | |
| 2152 | 6336 FreeRegionList* free_list) : |
| 4072 | 6337 _old_set(old_set), _humongous_set(humongous_set), |
| 6338 _free_list(free_list), _region_count(0) { } | |
| 2152 | 6339 |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
6340 uint region_count() { return _region_count; } |
| 2152 | 6341 |
| 6342 bool doHeapRegion(HeapRegion* hr) { | |
| 6343 _region_count += 1; | |
| 6344 | |
| 6345 if (hr->continuesHumongous()) { | |
| 6346 return false; | |
| 6347 } | |
| 6348 | |
| 6349 if (hr->is_young()) { | |
| 6350 // TODO | |
| 6351 } else if (hr->startsHumongous()) { | |
| 6352 _humongous_set->verify_next_region(hr); | |
| 6353 } else if (hr->is_empty()) { | |
| 6354 _free_list->verify_next_region(hr); | |
| 4072 | 6355 } else { |
| 6356 _old_set->verify_next_region(hr); | |
| 2152 | 6357 } |
| 6358 return false; | |
| 6359 } | |
| 6360 }; | |
| 6361 | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
6362 HeapRegion* G1CollectedHeap::new_heap_region(uint hrs_index, |
| 3766 | 6363 HeapWord* bottom) { |
| 6364 HeapWord* end = bottom + HeapRegion::GrainWords; | |
| 6365 MemRegion mr(bottom, end); | |
| 6366 assert(_g1_reserved.contains(mr), "invariant"); | |
| 6367 // This might return NULL if the allocation fails | |
| 6368 return new HeapRegion(hrs_index, _bot_shared, mr, true /* is_zeroed */); | |
| 6369 } | |
| 6370 | |
| 2152 | 6371 void G1CollectedHeap::verify_region_sets() { |
| 6372 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); | |
| 6373 | |
| 6374 // First, check the explicit lists. | |
| 6375 _free_list.verify(); | |
| 6376 { | |
| 6377 // Given that a concurrent operation might be adding regions to | |
| 6378 // the secondary free list we have to take the lock before | |
| 6379 // verifying it. | |
| 6380 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
| 6381 _secondary_free_list.verify(); | |
| 6382 } | |
| 4072 | 6383 _old_set.verify(); |
| 2152 | 6384 _humongous_set.verify(); |
| 6385 | |
| 6386 // If a concurrent region freeing operation is in progress it will | |
| 6387 // be difficult to correctly attributed any free regions we come | |
| 6388 // across to the correct free list given that they might belong to | |
| 6389 // one of several (free_list, secondary_free_list, any local lists, | |
| 6390 // etc.). So, if that's the case we will skip the rest of the | |
| 6391 // verification operation. Alternatively, waiting for the concurrent | |
| 6392 // operation to complete will have a non-trivial effect on the GC's | |
| 6393 // operation (no concurrent operation will last longer than the | |
| 6394 // interval between two calls to verification) and it might hide | |
| 6395 // any issues that we would like to catch during testing. | |
| 6396 if (free_regions_coming()) { | |
| 6397 return; | |
| 6398 } | |
| 6399 | |
| 2361 | 6400 // Make sure we append the secondary_free_list on the free_list so |
| 6401 // that all free regions we will come across can be safely | |
| 6402 // attributed to the free_list. | |
| 6403 append_secondary_free_list_if_not_empty_with_lock(); | |
| 2152 | 6404 |
| 6405 // Finally, make sure that the region accounting in the lists is | |
| 6406 // consistent with what we see in the heap. | |
| 4072 | 6407 _old_set.verify_start(); |
| 2152 | 6408 _humongous_set.verify_start(); |
| 6409 _free_list.verify_start(); | |
| 6410 | |
| 4072 | 6411 VerifyRegionListsClosure cl(&_old_set, &_humongous_set, &_free_list); |
| 2152 | 6412 heap_region_iterate(&cl); |
| 6413 | |
| 4072 | 6414 _old_set.verify_end(); |
| 2152 | 6415 _humongous_set.verify_end(); |
| 6416 _free_list.verify_end(); | |
| 342 | 6417 } |