Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp @ 4837:eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
Summary: Re-enable survivors during the initial-mark pause. Afterwards, the concurrent marking threads have to scan them and mark everything reachable from them. The next GC will have to wait for the survivors to be scanned.
Reviewed-by: brutisso, johnc
| author | tonyp |
|---|---|
| date | Wed, 25 Jan 2012 12:58:23 -0500 |
| parents | d30fa85f9994 |
| children | 379b22e03c32 |
| rev | line source |
|---|---|
| 342 | 1 /* |
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2 * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved. |
| 342 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 342 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "code/icBuffer.hpp" | |
| 27 #include "gc_implementation/g1/bufferingOopClosure.hpp" | |
| 28 #include "gc_implementation/g1/concurrentG1Refine.hpp" | |
| 29 #include "gc_implementation/g1/concurrentG1RefineThread.hpp" | |
| 30 #include "gc_implementation/g1/concurrentMarkThread.inline.hpp" | |
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31 #include "gc_implementation/g1/g1AllocRegion.inline.hpp" |
| 1972 | 32 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" |
| 33 #include "gc_implementation/g1/g1CollectorPolicy.hpp" | |
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34 #include "gc_implementation/g1/g1ErgoVerbose.hpp" |
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35 #include "gc_implementation/g1/g1EvacFailure.hpp" |
| 1972 | 36 #include "gc_implementation/g1/g1MarkSweep.hpp" |
| 37 #include "gc_implementation/g1/g1OopClosures.inline.hpp" | |
| 38 #include "gc_implementation/g1/g1RemSet.inline.hpp" | |
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39 #include "gc_implementation/g1/heapRegion.inline.hpp" |
| 1972 | 40 #include "gc_implementation/g1/heapRegionRemSet.hpp" |
| 41 #include "gc_implementation/g1/heapRegionSeq.inline.hpp" | |
| 42 #include "gc_implementation/g1/vm_operations_g1.hpp" | |
| 43 #include "gc_implementation/shared/isGCActiveMark.hpp" | |
| 44 #include "memory/gcLocker.inline.hpp" | |
| 45 #include "memory/genOopClosures.inline.hpp" | |
| 46 #include "memory/generationSpec.hpp" | |
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47 #include "memory/referenceProcessor.hpp" |
| 1972 | 48 #include "oops/oop.inline.hpp" |
| 49 #include "oops/oop.pcgc.inline.hpp" | |
| 50 #include "runtime/aprofiler.hpp" | |
| 51 #include "runtime/vmThread.hpp" | |
| 342 | 52 |
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53 size_t G1CollectedHeap::_humongous_object_threshold_in_words = 0; |
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54 |
| 342 | 55 // turn it on so that the contents of the young list (scan-only / |
| 56 // to-be-collected) are printed at "strategic" points before / during | |
| 57 // / after the collection --- this is useful for debugging | |
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58 #define YOUNG_LIST_VERBOSE 0 |
| 342 | 59 // CURRENT STATUS |
| 60 // This file is under construction. Search for "FIXME". | |
| 61 | |
| 62 // INVARIANTS/NOTES | |
| 63 // | |
| 64 // All allocation activity covered by the G1CollectedHeap interface is | |
| 1973 | 65 // serialized by acquiring the HeapLock. This happens in mem_allocate |
| 66 // and allocate_new_tlab, which are the "entry" points to the | |
| 67 // allocation code from the rest of the JVM. (Note that this does not | |
| 68 // apply to TLAB allocation, which is not part of this interface: it | |
| 69 // is done by clients of this interface.) | |
| 342 | 70 |
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71 // Notes on implementation of parallelism in different tasks. |
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72 // |
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73 // G1ParVerifyTask uses heap_region_par_iterate_chunked() for parallelism. |
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74 // The number of GC workers is passed to heap_region_par_iterate_chunked(). |
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75 // It does use run_task() which sets _n_workers in the task. |
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76 // G1ParTask executes g1_process_strong_roots() -> |
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77 // SharedHeap::process_strong_roots() which calls eventuall to |
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78 // CardTableModRefBS::par_non_clean_card_iterate_work() which uses |
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79 // SequentialSubTasksDone. SharedHeap::process_strong_roots() also |
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80 // directly uses SubTasksDone (_process_strong_tasks field in SharedHeap). |
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81 // |
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82 |
| 342 | 83 // Local to this file. |
| 84 | |
| 85 class RefineCardTableEntryClosure: public CardTableEntryClosure { | |
| 86 SuspendibleThreadSet* _sts; | |
| 87 G1RemSet* _g1rs; | |
| 88 ConcurrentG1Refine* _cg1r; | |
| 89 bool _concurrent; | |
| 90 public: | |
| 91 RefineCardTableEntryClosure(SuspendibleThreadSet* sts, | |
| 92 G1RemSet* g1rs, | |
| 93 ConcurrentG1Refine* cg1r) : | |
| 94 _sts(sts), _g1rs(g1rs), _cg1r(cg1r), _concurrent(true) | |
| 95 {} | |
| 96 bool do_card_ptr(jbyte* card_ptr, int worker_i) { | |
| 1705 | 97 bool oops_into_cset = _g1rs->concurrentRefineOneCard(card_ptr, worker_i, false); |
| 98 // This path is executed by the concurrent refine or mutator threads, | |
| 99 // concurrently, and so we do not care if card_ptr contains references | |
| 100 // that point into the collection set. | |
| 101 assert(!oops_into_cset, "should be"); | |
| 102 | |
| 342 | 103 if (_concurrent && _sts->should_yield()) { |
| 104 // Caller will actually yield. | |
| 105 return false; | |
| 106 } | |
| 107 // Otherwise, we finished successfully; return true. | |
| 108 return true; | |
| 109 } | |
| 110 void set_concurrent(bool b) { _concurrent = b; } | |
| 111 }; | |
| 112 | |
| 113 | |
| 114 class ClearLoggedCardTableEntryClosure: public CardTableEntryClosure { | |
| 115 int _calls; | |
| 116 G1CollectedHeap* _g1h; | |
| 117 CardTableModRefBS* _ctbs; | |
| 118 int _histo[256]; | |
| 119 public: | |
| 120 ClearLoggedCardTableEntryClosure() : | |
| 121 _calls(0) | |
| 122 { | |
| 123 _g1h = G1CollectedHeap::heap(); | |
| 124 _ctbs = (CardTableModRefBS*)_g1h->barrier_set(); | |
| 125 for (int i = 0; i < 256; i++) _histo[i] = 0; | |
| 126 } | |
| 127 bool do_card_ptr(jbyte* card_ptr, int worker_i) { | |
| 128 if (_g1h->is_in_reserved(_ctbs->addr_for(card_ptr))) { | |
| 129 _calls++; | |
| 130 unsigned char* ujb = (unsigned char*)card_ptr; | |
| 131 int ind = (int)(*ujb); | |
| 132 _histo[ind]++; | |
| 133 *card_ptr = -1; | |
| 134 } | |
| 135 return true; | |
| 136 } | |
| 137 int calls() { return _calls; } | |
| 138 void print_histo() { | |
| 139 gclog_or_tty->print_cr("Card table value histogram:"); | |
| 140 for (int i = 0; i < 256; i++) { | |
| 141 if (_histo[i] != 0) { | |
| 142 gclog_or_tty->print_cr(" %d: %d", i, _histo[i]); | |
| 143 } | |
| 144 } | |
| 145 } | |
| 146 }; | |
| 147 | |
| 148 class RedirtyLoggedCardTableEntryClosure: public CardTableEntryClosure { | |
| 149 int _calls; | |
| 150 G1CollectedHeap* _g1h; | |
| 151 CardTableModRefBS* _ctbs; | |
| 152 public: | |
| 153 RedirtyLoggedCardTableEntryClosure() : | |
| 154 _calls(0) | |
| 155 { | |
| 156 _g1h = G1CollectedHeap::heap(); | |
| 157 _ctbs = (CardTableModRefBS*)_g1h->barrier_set(); | |
| 158 } | |
| 159 bool do_card_ptr(jbyte* card_ptr, int worker_i) { | |
| 160 if (_g1h->is_in_reserved(_ctbs->addr_for(card_ptr))) { | |
| 161 _calls++; | |
| 162 *card_ptr = 0; | |
| 163 } | |
| 164 return true; | |
| 165 } | |
| 166 int calls() { return _calls; } | |
| 167 }; | |
| 168 | |
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169 class RedirtyLoggedCardTableEntryFastClosure : public CardTableEntryClosure { |
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170 public: |
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171 bool do_card_ptr(jbyte* card_ptr, int worker_i) { |
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172 *card_ptr = CardTableModRefBS::dirty_card_val(); |
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173 return true; |
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174 } |
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175 }; |
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176 |
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177 YoungList::YoungList(G1CollectedHeap* g1h) : |
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178 _g1h(g1h), _head(NULL), _length(0), _last_sampled_rs_lengths(0), |
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179 _survivor_head(NULL), _survivor_tail(NULL), _survivor_length(0) { |
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180 guarantee(check_list_empty(false), "just making sure..."); |
| 342 | 181 } |
| 182 | |
| 183 void YoungList::push_region(HeapRegion *hr) { | |
| 184 assert(!hr->is_young(), "should not already be young"); | |
| 185 assert(hr->get_next_young_region() == NULL, "cause it should!"); | |
| 186 | |
| 187 hr->set_next_young_region(_head); | |
| 188 _head = hr; | |
| 189 | |
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190 _g1h->g1_policy()->set_region_eden(hr, (int) _length); |
| 342 | 191 ++_length; |
| 192 } | |
| 193 | |
| 194 void YoungList::add_survivor_region(HeapRegion* hr) { | |
| 545 | 195 assert(hr->is_survivor(), "should be flagged as survivor region"); |
| 342 | 196 assert(hr->get_next_young_region() == NULL, "cause it should!"); |
| 197 | |
| 198 hr->set_next_young_region(_survivor_head); | |
| 199 if (_survivor_head == NULL) { | |
| 545 | 200 _survivor_tail = hr; |
| 342 | 201 } |
| 202 _survivor_head = hr; | |
| 203 ++_survivor_length; | |
| 204 } | |
| 205 | |
| 206 void YoungList::empty_list(HeapRegion* list) { | |
| 207 while (list != NULL) { | |
| 208 HeapRegion* next = list->get_next_young_region(); | |
| 209 list->set_next_young_region(NULL); | |
| 210 list->uninstall_surv_rate_group(); | |
| 211 list->set_not_young(); | |
| 212 list = next; | |
| 213 } | |
| 214 } | |
| 215 | |
| 216 void YoungList::empty_list() { | |
| 217 assert(check_list_well_formed(), "young list should be well formed"); | |
| 218 | |
| 219 empty_list(_head); | |
| 220 _head = NULL; | |
| 221 _length = 0; | |
| 222 | |
| 223 empty_list(_survivor_head); | |
| 224 _survivor_head = NULL; | |
| 545 | 225 _survivor_tail = NULL; |
| 342 | 226 _survivor_length = 0; |
| 227 | |
| 228 _last_sampled_rs_lengths = 0; | |
| 229 | |
| 230 assert(check_list_empty(false), "just making sure..."); | |
| 231 } | |
| 232 | |
| 233 bool YoungList::check_list_well_formed() { | |
| 234 bool ret = true; | |
| 235 | |
| 236 size_t length = 0; | |
| 237 HeapRegion* curr = _head; | |
| 238 HeapRegion* last = NULL; | |
| 239 while (curr != NULL) { | |
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240 if (!curr->is_young()) { |
| 342 | 241 gclog_or_tty->print_cr("### YOUNG REGION "PTR_FORMAT"-"PTR_FORMAT" " |
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242 "incorrectly tagged (y: %d, surv: %d)", |
| 342 | 243 curr->bottom(), curr->end(), |
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244 curr->is_young(), curr->is_survivor()); |
| 342 | 245 ret = false; |
| 246 } | |
| 247 ++length; | |
| 248 last = curr; | |
| 249 curr = curr->get_next_young_region(); | |
| 250 } | |
| 251 ret = ret && (length == _length); | |
| 252 | |
| 253 if (!ret) { | |
| 254 gclog_or_tty->print_cr("### YOUNG LIST seems not well formed!"); | |
| 255 gclog_or_tty->print_cr("### list has %d entries, _length is %d", | |
| 256 length, _length); | |
| 257 } | |
| 258 | |
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259 return ret; |
| 342 | 260 } |
| 261 | |
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262 bool YoungList::check_list_empty(bool check_sample) { |
| 342 | 263 bool ret = true; |
| 264 | |
| 265 if (_length != 0) { | |
| 266 gclog_or_tty->print_cr("### YOUNG LIST should have 0 length, not %d", | |
| 267 _length); | |
| 268 ret = false; | |
| 269 } | |
| 270 if (check_sample && _last_sampled_rs_lengths != 0) { | |
| 271 gclog_or_tty->print_cr("### YOUNG LIST has non-zero last sampled RS lengths"); | |
| 272 ret = false; | |
| 273 } | |
| 274 if (_head != NULL) { | |
| 275 gclog_or_tty->print_cr("### YOUNG LIST does not have a NULL head"); | |
| 276 ret = false; | |
| 277 } | |
| 278 if (!ret) { | |
| 279 gclog_or_tty->print_cr("### YOUNG LIST does not seem empty"); | |
| 280 } | |
| 281 | |
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282 return ret; |
| 342 | 283 } |
| 284 | |
| 285 void | |
| 286 YoungList::rs_length_sampling_init() { | |
| 287 _sampled_rs_lengths = 0; | |
| 288 _curr = _head; | |
| 289 } | |
| 290 | |
| 291 bool | |
| 292 YoungList::rs_length_sampling_more() { | |
| 293 return _curr != NULL; | |
| 294 } | |
| 295 | |
| 296 void | |
| 297 YoungList::rs_length_sampling_next() { | |
| 298 assert( _curr != NULL, "invariant" ); | |
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299 size_t rs_length = _curr->rem_set()->occupied(); |
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300 |
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301 _sampled_rs_lengths += rs_length; |
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302 |
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303 // The current region may not yet have been added to the |
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304 // incremental collection set (it gets added when it is |
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305 // retired as the current allocation region). |
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306 if (_curr->in_collection_set()) { |
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307 // Update the collection set policy information for this region |
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308 _g1h->g1_policy()->update_incremental_cset_info(_curr, rs_length); |
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309 } |
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310 |
| 342 | 311 _curr = _curr->get_next_young_region(); |
| 312 if (_curr == NULL) { | |
| 313 _last_sampled_rs_lengths = _sampled_rs_lengths; | |
| 314 // gclog_or_tty->print_cr("last sampled RS lengths = %d", _last_sampled_rs_lengths); | |
| 315 } | |
| 316 } | |
| 317 | |
| 318 void | |
| 319 YoungList::reset_auxilary_lists() { | |
| 320 guarantee( is_empty(), "young list should be empty" ); | |
| 321 assert(check_list_well_formed(), "young list should be well formed"); | |
| 322 | |
| 323 // Add survivor regions to SurvRateGroup. | |
| 324 _g1h->g1_policy()->note_start_adding_survivor_regions(); | |
| 545 | 325 _g1h->g1_policy()->finished_recalculating_age_indexes(true /* is_survivors */); |
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326 |
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327 int young_index_in_cset = 0; |
| 342 | 328 for (HeapRegion* curr = _survivor_head; |
| 329 curr != NULL; | |
| 330 curr = curr->get_next_young_region()) { | |
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331 _g1h->g1_policy()->set_region_survivor(curr, young_index_in_cset); |
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332 |
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333 // The region is a non-empty survivor so let's add it to |
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334 // the incremental collection set for the next evacuation |
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335 // pause. |
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336 _g1h->g1_policy()->add_region_to_incremental_cset_rhs(curr); |
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337 young_index_in_cset += 1; |
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338 } |
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339 assert((size_t) young_index_in_cset == _survivor_length, |
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340 "post-condition"); |
| 342 | 341 _g1h->g1_policy()->note_stop_adding_survivor_regions(); |
| 342 | |
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343 _head = _survivor_head; |
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344 _length = _survivor_length; |
| 342 | 345 if (_survivor_head != NULL) { |
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346 assert(_survivor_tail != NULL, "cause it shouldn't be"); |
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347 assert(_survivor_length > 0, "invariant"); |
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348 _survivor_tail->set_next_young_region(NULL); |
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349 } |
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350 |
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351 // Don't clear the survivor list handles until the start of |
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352 // the next evacuation pause - we need it in order to re-tag |
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353 // the survivor regions from this evacuation pause as 'young' |
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354 // at the start of the next. |
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355 |
| 545 | 356 _g1h->g1_policy()->finished_recalculating_age_indexes(false /* is_survivors */); |
| 342 | 357 |
| 358 assert(check_list_well_formed(), "young list should be well formed"); | |
| 359 } | |
| 360 | |
| 361 void YoungList::print() { | |
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362 HeapRegion* lists[] = {_head, _survivor_head}; |
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363 const char* names[] = {"YOUNG", "SURVIVOR"}; |
| 342 | 364 |
| 365 for (unsigned int list = 0; list < ARRAY_SIZE(lists); ++list) { | |
| 366 gclog_or_tty->print_cr("%s LIST CONTENTS", names[list]); | |
| 367 HeapRegion *curr = lists[list]; | |
| 368 if (curr == NULL) | |
| 369 gclog_or_tty->print_cr(" empty"); | |
| 370 while (curr != NULL) { | |
| 371 gclog_or_tty->print_cr(" [%08x-%08x], t: %08x, P: %08x, N: %08x, C: %08x, " | |
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372 "age: %4d, y: %d, surv: %d", |
| 342 | 373 curr->bottom(), curr->end(), |
| 374 curr->top(), | |
| 375 curr->prev_top_at_mark_start(), | |
| 376 curr->next_top_at_mark_start(), | |
| 377 curr->top_at_conc_mark_count(), | |
| 378 curr->age_in_surv_rate_group_cond(), | |
| 379 curr->is_young(), | |
| 380 curr->is_survivor()); | |
| 381 curr = curr->get_next_young_region(); | |
| 382 } | |
| 383 } | |
| 384 | |
| 385 gclog_or_tty->print_cr(""); | |
| 386 } | |
| 387 | |
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388 void G1CollectedHeap::push_dirty_cards_region(HeapRegion* hr) |
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389 { |
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390 // Claim the right to put the region on the dirty cards region list |
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391 // by installing a self pointer. |
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392 HeapRegion* next = hr->get_next_dirty_cards_region(); |
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393 if (next == NULL) { |
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394 HeapRegion* res = (HeapRegion*) |
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395 Atomic::cmpxchg_ptr(hr, hr->next_dirty_cards_region_addr(), |
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396 NULL); |
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397 if (res == NULL) { |
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398 HeapRegion* head; |
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399 do { |
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400 // Put the region to the dirty cards region list. |
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401 head = _dirty_cards_region_list; |
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402 next = (HeapRegion*) |
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403 Atomic::cmpxchg_ptr(hr, &_dirty_cards_region_list, head); |
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404 if (next == head) { |
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405 assert(hr->get_next_dirty_cards_region() == hr, |
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406 "hr->get_next_dirty_cards_region() != hr"); |
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407 if (next == NULL) { |
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408 // The last region in the list points to itself. |
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409 hr->set_next_dirty_cards_region(hr); |
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410 } else { |
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411 hr->set_next_dirty_cards_region(next); |
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412 } |
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413 } |
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414 } while (next != head); |
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415 } |
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416 } |
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417 } |
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418 |
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419 HeapRegion* G1CollectedHeap::pop_dirty_cards_region() |
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420 { |
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421 HeapRegion* head; |
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422 HeapRegion* hr; |
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423 do { |
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424 head = _dirty_cards_region_list; |
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425 if (head == NULL) { |
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426 return NULL; |
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427 } |
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428 HeapRegion* new_head = head->get_next_dirty_cards_region(); |
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429 if (head == new_head) { |
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430 // The last region. |
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431 new_head = NULL; |
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432 } |
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433 hr = (HeapRegion*)Atomic::cmpxchg_ptr(new_head, &_dirty_cards_region_list, |
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434 head); |
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435 } while (hr != head); |
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436 assert(hr != NULL, "invariant"); |
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437 hr->set_next_dirty_cards_region(NULL); |
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438 return hr; |
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439 } |
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440 |
| 342 | 441 void G1CollectedHeap::stop_conc_gc_threads() { |
| 794 | 442 _cg1r->stop(); |
| 342 | 443 _cmThread->stop(); |
| 444 } | |
| 445 | |
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446 #ifdef ASSERT |
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447 // A region is added to the collection set as it is retired |
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448 // so an address p can point to a region which will be in the |
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449 // collection set but has not yet been retired. This method |
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450 // therefore is only accurate during a GC pause after all |
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451 // regions have been retired. It is used for debugging |
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452 // to check if an nmethod has references to objects that can |
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453 // be move during a partial collection. Though it can be |
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454 // inaccurate, it is sufficient for G1 because the conservative |
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455 // implementation of is_scavengable() for G1 will indicate that |
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456 // all nmethods must be scanned during a partial collection. |
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457 bool G1CollectedHeap::is_in_partial_collection(const void* p) { |
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458 HeapRegion* hr = heap_region_containing(p); |
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459 return hr != NULL && hr->in_collection_set(); |
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460 } |
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461 #endif |
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462 |
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463 // Returns true if the reference points to an object that |
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464 // can move in an incremental collecction. |
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465 bool G1CollectedHeap::is_scavengable(const void* p) { |
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466 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
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467 G1CollectorPolicy* g1p = g1h->g1_policy(); |
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468 HeapRegion* hr = heap_region_containing(p); |
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469 if (hr == NULL) { |
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470 // perm gen (or null) |
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471 return false; |
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472 } else { |
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473 return !hr->isHumongous(); |
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474 } |
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475 } |
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476 |
| 342 | 477 void G1CollectedHeap::check_ct_logs_at_safepoint() { |
| 478 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
| 479 CardTableModRefBS* ct_bs = (CardTableModRefBS*)barrier_set(); | |
| 480 | |
| 481 // Count the dirty cards at the start. | |
| 482 CountNonCleanMemRegionClosure count1(this); | |
| 483 ct_bs->mod_card_iterate(&count1); | |
| 484 int orig_count = count1.n(); | |
| 485 | |
| 486 // First clear the logged cards. | |
| 487 ClearLoggedCardTableEntryClosure clear; | |
| 488 dcqs.set_closure(&clear); | |
| 489 dcqs.apply_closure_to_all_completed_buffers(); | |
| 490 dcqs.iterate_closure_all_threads(false); | |
| 491 clear.print_histo(); | |
| 492 | |
| 493 // Now ensure that there's no dirty cards. | |
| 494 CountNonCleanMemRegionClosure count2(this); | |
| 495 ct_bs->mod_card_iterate(&count2); | |
| 496 if (count2.n() != 0) { | |
| 497 gclog_or_tty->print_cr("Card table has %d entries; %d originally", | |
| 498 count2.n(), orig_count); | |
| 499 } | |
| 500 guarantee(count2.n() == 0, "Card table should be clean."); | |
| 501 | |
| 502 RedirtyLoggedCardTableEntryClosure redirty; | |
| 503 JavaThread::dirty_card_queue_set().set_closure(&redirty); | |
| 504 dcqs.apply_closure_to_all_completed_buffers(); | |
| 505 dcqs.iterate_closure_all_threads(false); | |
| 506 gclog_or_tty->print_cr("Log entries = %d, dirty cards = %d.", | |
| 507 clear.calls(), orig_count); | |
| 508 guarantee(redirty.calls() == clear.calls(), | |
| 509 "Or else mechanism is broken."); | |
| 510 | |
| 511 CountNonCleanMemRegionClosure count3(this); | |
| 512 ct_bs->mod_card_iterate(&count3); | |
| 513 if (count3.n() != orig_count) { | |
| 514 gclog_or_tty->print_cr("Should have restored them all: orig = %d, final = %d.", | |
| 515 orig_count, count3.n()); | |
| 516 guarantee(count3.n() >= orig_count, "Should have restored them all."); | |
| 517 } | |
| 518 | |
| 519 JavaThread::dirty_card_queue_set().set_closure(_refine_cte_cl); | |
| 520 } | |
| 521 | |
| 522 // Private class members. | |
| 523 | |
| 524 G1CollectedHeap* G1CollectedHeap::_g1h; | |
| 525 | |
| 526 // Private methods. | |
| 527 | |
| 2152 | 528 HeapRegion* |
| 2361 | 529 G1CollectedHeap::new_region_try_secondary_free_list() { |
| 2152 | 530 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
| 531 while (!_secondary_free_list.is_empty() || free_regions_coming()) { | |
| 532 if (!_secondary_free_list.is_empty()) { | |
| 533 if (G1ConcRegionFreeingVerbose) { | |
| 534 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 535 "secondary_free_list has "SIZE_FORMAT" entries", | |
| 536 _secondary_free_list.length()); | |
| 537 } | |
| 538 // It looks as if there are free regions available on the | |
| 539 // secondary_free_list. Let's move them to the free_list and try | |
| 540 // again to allocate from it. | |
| 541 append_secondary_free_list(); | |
| 542 | |
| 543 assert(!_free_list.is_empty(), "if the secondary_free_list was not " | |
| 544 "empty we should have moved at least one entry to the free_list"); | |
| 545 HeapRegion* res = _free_list.remove_head(); | |
| 546 if (G1ConcRegionFreeingVerbose) { | |
| 547 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 548 "allocated "HR_FORMAT" from secondary_free_list", | |
| 549 HR_FORMAT_PARAMS(res)); | |
| 550 } | |
| 551 return res; | |
| 552 } | |
| 553 | |
| 554 // Wait here until we get notifed either when (a) there are no | |
| 555 // more free regions coming or (b) some regions have been moved on | |
| 556 // the secondary_free_list. | |
| 557 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
| 558 } | |
| 559 | |
| 560 if (G1ConcRegionFreeingVerbose) { | |
| 561 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 562 "could not allocate from secondary_free_list"); | |
| 563 } | |
| 564 return NULL; | |
| 565 } | |
| 566 | |
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567 HeapRegion* G1CollectedHeap::new_region(size_t word_size, bool do_expand) { |
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568 assert(!isHumongous(word_size) || word_size <= HeapRegion::GrainWords, |
| 2152 | 569 "the only time we use this to allocate a humongous region is " |
| 570 "when we are allocating a single humongous region"); | |
| 571 | |
| 572 HeapRegion* res; | |
| 573 if (G1StressConcRegionFreeing) { | |
| 574 if (!_secondary_free_list.is_empty()) { | |
| 575 if (G1ConcRegionFreeingVerbose) { | |
| 576 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 577 "forced to look at the secondary_free_list"); | |
| 578 } | |
| 2361 | 579 res = new_region_try_secondary_free_list(); |
| 2152 | 580 if (res != NULL) { |
| 581 return res; | |
| 582 } | |
| 583 } | |
| 584 } | |
| 585 res = _free_list.remove_head_or_null(); | |
| 586 if (res == NULL) { | |
| 587 if (G1ConcRegionFreeingVerbose) { | |
| 588 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 589 "res == NULL, trying the secondary_free_list"); | |
| 590 } | |
| 2361 | 591 res = new_region_try_secondary_free_list(); |
| 2152 | 592 } |
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593 if (res == NULL && do_expand && _expand_heap_after_alloc_failure) { |
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594 // Currently, only attempts to allocate GC alloc regions set |
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595 // do_expand to true. So, we should only reach here during a |
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596 // safepoint. If this assumption changes we might have to |
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597 // reconsider the use of _expand_heap_after_alloc_failure. |
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598 assert(SafepointSynchronize::is_at_safepoint(), "invariant"); |
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599 |
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600 ergo_verbose1(ErgoHeapSizing, |
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601 "attempt heap expansion", |
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602 ergo_format_reason("region allocation request failed") |
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603 ergo_format_byte("allocation request"), |
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604 word_size * HeapWordSize); |
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605 if (expand(word_size * HeapWordSize)) { |
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606 // Given that expand() succeeded in expanding the heap, and we |
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607 // always expand the heap by an amount aligned to the heap |
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608 // region size, the free list should in theory not be empty. So |
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609 // it would probably be OK to use remove_head(). But the extra |
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610 // check for NULL is unlikely to be a performance issue here (we |
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611 // just expanded the heap!) so let's just be conservative and |
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612 // use remove_head_or_null(). |
| 3766 | 613 res = _free_list.remove_head_or_null(); |
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614 } else { |
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615 _expand_heap_after_alloc_failure = false; |
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616 } |
| 342 | 617 } |
| 618 return res; | |
| 619 } | |
| 620 | |
| 3766 | 621 size_t G1CollectedHeap::humongous_obj_allocate_find_first(size_t num_regions, |
| 622 size_t word_size) { | |
| 2361 | 623 assert(isHumongous(word_size), "word_size should be humongous"); |
| 624 assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); | |
| 625 | |
| 3766 | 626 size_t first = G1_NULL_HRS_INDEX; |
| 2152 | 627 if (num_regions == 1) { |
| 628 // Only one region to allocate, no need to go through the slower | |
| 629 // path. The caller will attempt the expasion if this fails, so | |
| 630 // let's not try to expand here too. | |
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631 HeapRegion* hr = new_region(word_size, false /* do_expand */); |
| 2152 | 632 if (hr != NULL) { |
| 633 first = hr->hrs_index(); | |
| 634 } else { | |
| 3766 | 635 first = G1_NULL_HRS_INDEX; |
| 2152 | 636 } |
| 637 } else { | |
| 638 // We can't allocate humongous regions while cleanupComplete() is | |
| 639 // running, since some of the regions we find to be empty might not | |
| 640 // yet be added to the free list and it is not straightforward to | |
| 641 // know which list they are on so that we can remove them. Note | |
| 642 // that we only need to do this if we need to allocate more than | |
| 643 // one region to satisfy the current humongous allocation | |
| 644 // request. If we are only allocating one region we use the common | |
| 645 // region allocation code (see above). | |
| 646 wait_while_free_regions_coming(); | |
| 2361 | 647 append_secondary_free_list_if_not_empty_with_lock(); |
| 2152 | 648 |
| 649 if (free_regions() >= num_regions) { | |
| 3766 | 650 first = _hrs.find_contiguous(num_regions); |
| 651 if (first != G1_NULL_HRS_INDEX) { | |
| 652 for (size_t i = first; i < first + num_regions; ++i) { | |
| 653 HeapRegion* hr = region_at(i); | |
| 2152 | 654 assert(hr->is_empty(), "sanity"); |
| 2361 | 655 assert(is_on_master_free_list(hr), "sanity"); |
| 2152 | 656 hr->set_pending_removal(true); |
| 657 } | |
| 658 _free_list.remove_all_pending(num_regions); | |
| 659 } | |
| 660 } | |
| 661 } | |
| 662 return first; | |
| 663 } | |
| 664 | |
| 2361 | 665 HeapWord* |
| 3766 | 666 G1CollectedHeap::humongous_obj_allocate_initialize_regions(size_t first, |
| 2361 | 667 size_t num_regions, |
| 668 size_t word_size) { | |
| 3766 | 669 assert(first != G1_NULL_HRS_INDEX, "pre-condition"); |
| 2361 | 670 assert(isHumongous(word_size), "word_size should be humongous"); |
| 671 assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); | |
| 672 | |
| 673 // Index of last region in the series + 1. | |
| 3766 | 674 size_t last = first + num_regions; |
| 2361 | 675 |
| 676 // We need to initialize the region(s) we just discovered. This is | |
| 677 // a bit tricky given that it can happen concurrently with | |
| 678 // refinement threads refining cards on these regions and | |
| 679 // potentially wanting to refine the BOT as they are scanning | |
| 680 // those cards (this can happen shortly after a cleanup; see CR | |
| 681 // 6991377). So we have to set up the region(s) carefully and in | |
| 682 // a specific order. | |
| 683 | |
| 684 // The word size sum of all the regions we will allocate. | |
| 685 size_t word_size_sum = num_regions * HeapRegion::GrainWords; | |
| 686 assert(word_size <= word_size_sum, "sanity"); | |
| 687 | |
| 688 // This will be the "starts humongous" region. | |
| 3766 | 689 HeapRegion* first_hr = region_at(first); |
| 2361 | 690 // The header of the new object will be placed at the bottom of |
| 691 // the first region. | |
| 692 HeapWord* new_obj = first_hr->bottom(); | |
| 693 // This will be the new end of the first region in the series that | |
| 694 // should also match the end of the last region in the seriers. | |
| 695 HeapWord* new_end = new_obj + word_size_sum; | |
| 696 // This will be the new top of the first region that will reflect | |
| 697 // this allocation. | |
| 698 HeapWord* new_top = new_obj + word_size; | |
| 699 | |
| 700 // First, we need to zero the header of the space that we will be | |
| 701 // allocating. When we update top further down, some refinement | |
| 702 // threads might try to scan the region. By zeroing the header we | |
| 703 // ensure that any thread that will try to scan the region will | |
| 704 // come across the zero klass word and bail out. | |
| 705 // | |
| 706 // NOTE: It would not have been correct to have used | |
| 707 // CollectedHeap::fill_with_object() and make the space look like | |
| 708 // an int array. The thread that is doing the allocation will | |
| 709 // later update the object header to a potentially different array | |
| 710 // type and, for a very short period of time, the klass and length | |
| 711 // fields will be inconsistent. This could cause a refinement | |
| 712 // thread to calculate the object size incorrectly. | |
| 713 Copy::fill_to_words(new_obj, oopDesc::header_size(), 0); | |
| 714 | |
| 715 // We will set up the first region as "starts humongous". This | |
| 716 // will also update the BOT covering all the regions to reflect | |
| 717 // that there is a single object that starts at the bottom of the | |
| 718 // first region. | |
| 719 first_hr->set_startsHumongous(new_top, new_end); | |
| 720 | |
| 721 // Then, if there are any, we will set up the "continues | |
| 722 // humongous" regions. | |
| 723 HeapRegion* hr = NULL; | |
| 3766 | 724 for (size_t i = first + 1; i < last; ++i) { |
| 725 hr = region_at(i); | |
| 2361 | 726 hr->set_continuesHumongous(first_hr); |
| 727 } | |
| 728 // If we have "continues humongous" regions (hr != NULL), then the | |
| 729 // end of the last one should match new_end. | |
| 730 assert(hr == NULL || hr->end() == new_end, "sanity"); | |
| 731 | |
| 732 // Up to this point no concurrent thread would have been able to | |
| 733 // do any scanning on any region in this series. All the top | |
| 734 // fields still point to bottom, so the intersection between | |
| 735 // [bottom,top] and [card_start,card_end] will be empty. Before we | |
| 736 // update the top fields, we'll do a storestore to make sure that | |
| 737 // no thread sees the update to top before the zeroing of the | |
| 738 // object header and the BOT initialization. | |
| 739 OrderAccess::storestore(); | |
| 740 | |
| 741 // Now that the BOT and the object header have been initialized, | |
| 742 // we can update top of the "starts humongous" region. | |
| 743 assert(first_hr->bottom() < new_top && new_top <= first_hr->end(), | |
| 744 "new_top should be in this region"); | |
| 745 first_hr->set_top(new_top); | |
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746 if (_hr_printer.is_active()) { |
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747 HeapWord* bottom = first_hr->bottom(); |
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748 HeapWord* end = first_hr->orig_end(); |
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749 if ((first + 1) == last) { |
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750 // the series has a single humongous region |
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751 _hr_printer.alloc(G1HRPrinter::SingleHumongous, first_hr, new_top); |
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752 } else { |
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753 // the series has more than one humongous regions |
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754 _hr_printer.alloc(G1HRPrinter::StartsHumongous, first_hr, end); |
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755 } |
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756 } |
| 2361 | 757 |
| 758 // Now, we will update the top fields of the "continues humongous" | |
| 759 // regions. The reason we need to do this is that, otherwise, | |
| 760 // these regions would look empty and this will confuse parts of | |
| 761 // G1. For example, the code that looks for a consecutive number | |
| 762 // of empty regions will consider them empty and try to | |
| 763 // re-allocate them. We can extend is_empty() to also include | |
| 764 // !continuesHumongous(), but it is easier to just update the top | |
| 765 // fields here. The way we set top for all regions (i.e., top == | |
| 766 // end for all regions but the last one, top == new_top for the | |
| 767 // last one) is actually used when we will free up the humongous | |
| 768 // region in free_humongous_region(). | |
| 769 hr = NULL; | |
| 3766 | 770 for (size_t i = first + 1; i < last; ++i) { |
| 771 hr = region_at(i); | |
| 2361 | 772 if ((i + 1) == last) { |
| 773 // last continues humongous region | |
| 774 assert(hr->bottom() < new_top && new_top <= hr->end(), | |
| 775 "new_top should fall on this region"); | |
| 776 hr->set_top(new_top); | |
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777 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, new_top); |
| 2361 | 778 } else { |
| 779 // not last one | |
| 780 assert(new_top > hr->end(), "new_top should be above this region"); | |
| 781 hr->set_top(hr->end()); | |
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782 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, hr->end()); |
| 2361 | 783 } |
| 784 } | |
| 785 // If we have continues humongous regions (hr != NULL), then the | |
| 786 // end of the last one should match new_end and its top should | |
| 787 // match new_top. | |
| 788 assert(hr == NULL || | |
| 789 (hr->end() == new_end && hr->top() == new_top), "sanity"); | |
| 790 | |
| 791 assert(first_hr->used() == word_size * HeapWordSize, "invariant"); | |
| 792 _summary_bytes_used += first_hr->used(); | |
| 793 _humongous_set.add(first_hr); | |
| 794 | |
| 795 return new_obj; | |
| 796 } | |
| 797 | |
| 342 | 798 // If could fit into free regions w/o expansion, try. |
| 799 // Otherwise, if can expand, do so. | |
| 800 // Otherwise, if using ex regions might help, try with ex given back. | |
| 1973 | 801 HeapWord* G1CollectedHeap::humongous_obj_allocate(size_t word_size) { |
| 2152 | 802 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
| 803 | |
| 804 verify_region_sets_optional(); | |
| 342 | 805 |
| 806 size_t num_regions = | |
| 1973 | 807 round_to(word_size, HeapRegion::GrainWords) / HeapRegion::GrainWords; |
| 342 | 808 size_t x_size = expansion_regions(); |
| 3766 | 809 size_t fs = _hrs.free_suffix(); |
| 810 size_t first = humongous_obj_allocate_find_first(num_regions, word_size); | |
| 811 if (first == G1_NULL_HRS_INDEX) { | |
| 2152 | 812 // The only thing we can do now is attempt expansion. |
| 342 | 813 if (fs + x_size >= num_regions) { |
|
2188
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|
814 // If the number of regions we're trying to allocate for this |
|
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|
815 // object is at most the number of regions in the free suffix, |
|
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|
816 // then the call to humongous_obj_allocate_find_first() above |
|
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|
817 // should have succeeded and we wouldn't be here. |
|
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|
818 // |
|
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|
819 // We should only be trying to expand when the free suffix is |
|
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|
820 // not sufficient for the object _and_ we have some expansion |
|
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|
821 // room available. |
|
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|
822 assert(num_regions > fs, "earlier allocation should have succeeded"); |
|
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|
823 |
|
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|
824 ergo_verbose1(ErgoHeapSizing, |
|
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825 "attempt heap expansion", |
|
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|
826 ergo_format_reason("humongous allocation request failed") |
|
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|
827 ergo_format_byte("allocation request"), |
|
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|
828 word_size * HeapWordSize); |
|
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|
829 if (expand((num_regions - fs) * HeapRegion::GrainBytes)) { |
| 3766 | 830 // Even though the heap was expanded, it might not have |
| 831 // reached the desired size. So, we cannot assume that the | |
| 832 // allocation will succeed. | |
|
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|
833 first = humongous_obj_allocate_find_first(num_regions, word_size); |
|
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|
834 } |
| 2152 | 835 } |
| 836 } | |
| 837 | |
| 2361 | 838 HeapWord* result = NULL; |
| 3766 | 839 if (first != G1_NULL_HRS_INDEX) { |
| 2361 | 840 result = |
| 841 humongous_obj_allocate_initialize_regions(first, num_regions, word_size); | |
| 842 assert(result != NULL, "it should always return a valid result"); | |
|
3980
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|
843 |
|
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|
844 // A successful humongous object allocation changes the used space |
|
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|
845 // information of the old generation so we need to recalculate the |
|
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|
846 // sizes and update the jstat counters here. |
|
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|
847 g1mm()->update_sizes(); |
| 2152 | 848 } |
| 849 | |
| 850 verify_region_sets_optional(); | |
| 2361 | 851 |
| 852 return result; | |
| 342 | 853 } |
| 854 | |
| 1973 | 855 HeapWord* G1CollectedHeap::allocate_new_tlab(size_t word_size) { |
| 856 assert_heap_not_locked_and_not_at_safepoint(); | |
|
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|
857 assert(!isHumongous(word_size), "we do not allow humongous TLABs"); |
|
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|
858 |
|
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|
859 unsigned int dummy_gc_count_before; |
|
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|
860 return attempt_allocation(word_size, &dummy_gc_count_before); |
| 342 | 861 } |
| 862 | |
| 863 HeapWord* | |
| 864 G1CollectedHeap::mem_allocate(size_t word_size, | |
| 1973 | 865 bool* gc_overhead_limit_was_exceeded) { |
| 866 assert_heap_not_locked_and_not_at_safepoint(); | |
| 342 | 867 |
|
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|
868 // Loop until the allocation is satisified, or unsatisfied after GC. |
| 1973 | 869 for (int try_count = 1; /* we'll return */; try_count += 1) { |
| 870 unsigned int gc_count_before; | |
|
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|
871 |
|
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|
872 HeapWord* result = NULL; |
|
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|
873 if (!isHumongous(word_size)) { |
|
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|
874 result = attempt_allocation(word_size, &gc_count_before); |
|
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|
875 } else { |
|
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|
876 result = attempt_allocation_humongous(word_size, &gc_count_before); |
|
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|
877 } |
|
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|
878 if (result != NULL) { |
|
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|
879 return result; |
| 342 | 880 } |
| 881 | |
| 882 // Create the garbage collection operation... | |
| 1973 | 883 VM_G1CollectForAllocation op(gc_count_before, word_size); |
| 342 | 884 // ...and get the VM thread to execute it. |
| 885 VMThread::execute(&op); | |
| 1973 | 886 |
| 887 if (op.prologue_succeeded() && op.pause_succeeded()) { | |
| 888 // If the operation was successful we'll return the result even | |
| 889 // if it is NULL. If the allocation attempt failed immediately | |
| 890 // after a Full GC, it's unlikely we'll be able to allocate now. | |
| 891 HeapWord* result = op.result(); | |
| 892 if (result != NULL && !isHumongous(word_size)) { | |
| 893 // Allocations that take place on VM operations do not do any | |
| 894 // card dirtying and we have to do it here. We only have to do | |
| 895 // this for non-humongous allocations, though. | |
| 896 dirty_young_block(result, word_size); | |
| 897 } | |
| 342 | 898 return result; |
| 1973 | 899 } else { |
| 900 assert(op.result() == NULL, | |
| 901 "the result should be NULL if the VM op did not succeed"); | |
| 342 | 902 } |
| 903 | |
| 904 // Give a warning if we seem to be looping forever. | |
| 905 if ((QueuedAllocationWarningCount > 0) && | |
| 906 (try_count % QueuedAllocationWarningCount == 0)) { | |
| 1973 | 907 warning("G1CollectedHeap::mem_allocate retries %d times", try_count); |
| 342 | 908 } |
| 909 } | |
| 1973 | 910 |
| 911 ShouldNotReachHere(); | |
|
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|
912 return NULL; |
| 342 | 913 } |
| 914 | |
|
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|
915 HeapWord* G1CollectedHeap::attempt_allocation_slow(size_t word_size, |
|
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|
916 unsigned int *gc_count_before_ret) { |
|
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|
917 // Make sure you read the note in attempt_allocation_humongous(). |
|
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|
918 |
|
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|
919 assert_heap_not_locked_and_not_at_safepoint(); |
|
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|
920 assert(!isHumongous(word_size), "attempt_allocation_slow() should not " |
|
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|
921 "be called for humongous allocation requests"); |
|
abdfc822206f
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|
922 |
|
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diff
changeset
|
923 // We should only get here after the first-level allocation attempt |
|
abdfc822206f
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diff
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|
924 // (attempt_allocation()) failed to allocate. |
|
abdfc822206f
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|
925 |
|
abdfc822206f
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diff
changeset
|
926 // We will loop until a) we manage to successfully perform the |
|
abdfc822206f
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diff
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|
927 // allocation or b) we successfully schedule a collection which |
|
abdfc822206f
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diff
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|
928 // fails to perform the allocation. b) is the only case when we'll |
|
abdfc822206f
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diff
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|
929 // return NULL. |
|
abdfc822206f
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diff
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|
930 HeapWord* result = NULL; |
|
abdfc822206f
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diff
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|
931 for (int try_count = 1; /* we'll return */; try_count += 1) { |
|
abdfc822206f
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diff
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|
932 bool should_try_gc; |
|
abdfc822206f
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|
933 unsigned int gc_count_before; |
|
abdfc822206f
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|
934 |
|
abdfc822206f
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|
935 { |
|
abdfc822206f
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|
936 MutexLockerEx x(Heap_lock); |
|
abdfc822206f
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diff
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|
937 |
|
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diff
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|
938 result = _mutator_alloc_region.attempt_allocation_locked(word_size, |
|
abdfc822206f
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|
939 false /* bot_updates */); |
|
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diff
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|
940 if (result != NULL) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
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diff
changeset
|
941 return result; |
|
abdfc822206f
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tonyp
parents:
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diff
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|
942 } |
|
abdfc822206f
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diff
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|
943 |
|
abdfc822206f
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diff
changeset
|
944 // If we reach here, attempt_allocation_locked() above failed to |
|
abdfc822206f
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diff
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|
945 // allocate a new region. So the mutator alloc region should be NULL. |
|
abdfc822206f
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|
946 assert(_mutator_alloc_region.get() == NULL, "only way to get here"); |
|
abdfc822206f
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|
947 |
|
abdfc822206f
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diff
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|
948 if (GC_locker::is_active_and_needs_gc()) { |
|
abdfc822206f
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diff
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|
949 if (g1_policy()->can_expand_young_list()) { |
|
3914
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|
950 // No need for an ergo verbose message here, |
|
20213c8a3c40
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|
951 // can_expand_young_list() does this when it returns true. |
|
2433
abdfc822206f
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|
952 result = _mutator_alloc_region.attempt_allocation_force(word_size, |
|
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|
953 false /* bot_updates */); |
|
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diff
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|
954 if (result != NULL) { |
|
abdfc822206f
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|
955 return result; |
|
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diff
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|
956 } |
|
abdfc822206f
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|
957 } |
|
abdfc822206f
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|
958 should_try_gc = false; |
|
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|
959 } else { |
|
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diff
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|
960 // Read the GC count while still holding the Heap_lock. |
|
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|
961 gc_count_before = SharedHeap::heap()->total_collections(); |
|
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|
962 should_try_gc = true; |
|
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|
963 } |
|
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|
964 } |
|
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|
965 |
|
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|
966 if (should_try_gc) { |
|
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|
967 bool succeeded; |
|
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|
968 result = do_collection_pause(word_size, gc_count_before, &succeeded); |
|
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|
969 if (result != NULL) { |
|
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|
970 assert(succeeded, "only way to get back a non-NULL result"); |
|
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|
971 return result; |
|
abdfc822206f
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diff
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|
972 } |
|
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|
973 |
|
abdfc822206f
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diff
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|
974 if (succeeded) { |
|
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changeset
|
975 // If we get here we successfully scheduled a collection which |
|
abdfc822206f
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|
976 // failed to allocate. No point in trying to allocate |
|
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diff
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|
977 // further. We'll just return NULL. |
|
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|
978 MutexLockerEx x(Heap_lock); |
|
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|
979 *gc_count_before_ret = SharedHeap::heap()->total_collections(); |
|
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|
980 return NULL; |
|
abdfc822206f
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981 } |
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982 } else { |
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983 GC_locker::stall_until_clear(); |
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984 } |
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985 |
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986 // We can reach here if we were unsuccessul in scheduling a |
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987 // collection (because another thread beat us to it) or if we were |
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988 // stalled due to the GC locker. In either can we should retry the |
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989 // allocation attempt in case another thread successfully |
|
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990 // performed a collection and reclaimed enough space. We do the |
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991 // first attempt (without holding the Heap_lock) here and the |
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992 // follow-on attempt will be at the start of the next loop |
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993 // iteration (after taking the Heap_lock). |
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994 result = _mutator_alloc_region.attempt_allocation(word_size, |
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995 false /* bot_updates */); |
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996 if (result != NULL ){ |
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997 return result; |
|
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998 } |
|
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999 |
|
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1000 // Give a warning if we seem to be looping forever. |
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1001 if ((QueuedAllocationWarningCount > 0) && |
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1002 (try_count % QueuedAllocationWarningCount == 0)) { |
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1003 warning("G1CollectedHeap::attempt_allocation_slow() " |
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1004 "retries %d times", try_count); |
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1005 } |
|
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1006 } |
|
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1007 |
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1008 ShouldNotReachHere(); |
|
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1009 return NULL; |
|
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1010 } |
|
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1011 |
|
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1012 HeapWord* G1CollectedHeap::attempt_allocation_humongous(size_t word_size, |
|
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1013 unsigned int * gc_count_before_ret) { |
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1014 // The structure of this method has a lot of similarities to |
|
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1015 // attempt_allocation_slow(). The reason these two were not merged |
|
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1016 // into a single one is that such a method would require several "if |
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1017 // allocation is not humongous do this, otherwise do that" |
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1018 // conditional paths which would obscure its flow. In fact, an early |
|
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1019 // version of this code did use a unified method which was harder to |
|
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1020 // follow and, as a result, it had subtle bugs that were hard to |
|
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1021 // track down. So keeping these two methods separate allows each to |
|
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1022 // be more readable. It will be good to keep these two in sync as |
|
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1023 // much as possible. |
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1024 |
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1025 assert_heap_not_locked_and_not_at_safepoint(); |
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1026 assert(isHumongous(word_size), "attempt_allocation_humongous() " |
|
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1027 "should only be called for humongous allocations"); |
|
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1028 |
|
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1029 // Humongous objects can exhaust the heap quickly, so we should check if we |
|
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1030 // need to start a marking cycle at each humongous object allocation. We do |
|
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1031 // the check before we do the actual allocation. The reason for doing it |
|
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1032 // before the allocation is that we avoid having to keep track of the newly |
|
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1033 // allocated memory while we do a GC. |
|
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1034 if (g1_policy()->need_to_start_conc_mark("concurrent humongous allocation", word_size)) { |
|
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1035 collect(GCCause::_g1_humongous_allocation); |
|
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|
1036 } |
|
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|
1037 |
|
2433
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1038 // We will loop until a) we manage to successfully perform the |
|
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1039 // allocation or b) we successfully schedule a collection which |
|
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1040 // fails to perform the allocation. b) is the only case when we'll |
|
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1041 // return NULL. |
|
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|
1042 HeapWord* result = NULL; |
|
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1043 for (int try_count = 1; /* we'll return */; try_count += 1) { |
|
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|
1044 bool should_try_gc; |
|
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|
1045 unsigned int gc_count_before; |
|
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|
1046 |
|
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|
1047 { |
|
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|
1048 MutexLockerEx x(Heap_lock); |
|
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|
1049 |
|
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|
1050 // Given that humongous objects are not allocated in young |
|
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1051 // regions, we'll first try to do the allocation without doing a |
|
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|
1052 // collection hoping that there's enough space in the heap. |
|
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|
1053 result = humongous_obj_allocate(word_size); |
|
4834
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|
1054 if (result != NULL) { |
|
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|
1055 return result; |
|
2433
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|
1056 } |
|
4834
6a78aa6ac1ff
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|
1057 |
|
6a78aa6ac1ff
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|
1058 if (GC_locker::is_active_and_needs_gc()) { |
|
6a78aa6ac1ff
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|
1059 should_try_gc = false; |
|
6a78aa6ac1ff
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|
1060 } else { |
|
6a78aa6ac1ff
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|
1061 // Read the GC count while still holding the Heap_lock. |
|
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|
1062 gc_count_before = SharedHeap::heap()->total_collections(); |
|
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|
1063 should_try_gc = true; |
|
2433
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|
1064 } |
|
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|
1065 } |
|
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|
1066 |
|
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|
1067 if (should_try_gc) { |
|
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|
1068 // If we failed to allocate the humongous object, we should try to |
|
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|
1069 // do a collection pause (if we're allowed) in case it reclaims |
|
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|
1070 // enough space for the allocation to succeed after the pause. |
|
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|
1071 |
|
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|
1072 bool succeeded; |
|
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|
1073 result = do_collection_pause(word_size, gc_count_before, &succeeded); |
|
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|
1074 if (result != NULL) { |
|
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|
1075 assert(succeeded, "only way to get back a non-NULL result"); |
|
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|
1076 return result; |
|
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|
1077 } |
|
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|
1078 |
|
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|
1079 if (succeeded) { |
|
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|
1080 // If we get here we successfully scheduled a collection which |
|
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|
1081 // failed to allocate. No point in trying to allocate |
|
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|
1082 // further. We'll just return NULL. |
|
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|
1083 MutexLockerEx x(Heap_lock); |
|
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|
1084 *gc_count_before_ret = SharedHeap::heap()->total_collections(); |
|
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|
1085 return NULL; |
|
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|
1086 } |
|
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|
1087 } else { |
|
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|
1088 GC_locker::stall_until_clear(); |
|
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|
1089 } |
|
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|
1090 |
|
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|
1091 // We can reach here if we were unsuccessul in scheduling a |
|
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|
1092 // collection (because another thread beat us to it) or if we were |
|
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|
1093 // stalled due to the GC locker. In either can we should retry the |
|
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|
1094 // allocation attempt in case another thread successfully |
|
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|
1095 // performed a collection and reclaimed enough space. Give a |
|
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|
1096 // warning if we seem to be looping forever. |
|
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1097 |
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1098 if ((QueuedAllocationWarningCount > 0) && |
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1099 (try_count % QueuedAllocationWarningCount == 0)) { |
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1100 warning("G1CollectedHeap::attempt_allocation_humongous() " |
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1101 "retries %d times", try_count); |
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1102 } |
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1103 } |
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1104 |
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1105 ShouldNotReachHere(); |
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1106 return NULL; |
|
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1107 } |
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1108 |
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1109 HeapWord* G1CollectedHeap::attempt_allocation_at_safepoint(size_t word_size, |
|
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1110 bool expect_null_mutator_alloc_region) { |
| 2152 | 1111 assert_at_safepoint(true /* should_be_vm_thread */); |
|
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1112 assert(_mutator_alloc_region.get() == NULL || |
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1113 !expect_null_mutator_alloc_region, |
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1114 "the current alloc region was unexpectedly found to be non-NULL"); |
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1115 |
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1116 if (!isHumongous(word_size)) { |
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1117 return _mutator_alloc_region.attempt_allocation_locked(word_size, |
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1118 false /* bot_updates */); |
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1119 } else { |
|
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1120 HeapWord* result = humongous_obj_allocate(word_size); |
|
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1121 if (result != NULL && g1_policy()->need_to_start_conc_mark("STW humongous allocation")) { |
|
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1122 g1_policy()->set_initiate_conc_mark_if_possible(); |
|
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1123 } |
|
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1124 return result; |
|
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1125 } |
|
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1126 |
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1127 ShouldNotReachHere(); |
| 342 | 1128 } |
| 1129 | |
| 1130 class PostMCRemSetClearClosure: public HeapRegionClosure { | |
| 1131 ModRefBarrierSet* _mr_bs; | |
| 1132 public: | |
| 1133 PostMCRemSetClearClosure(ModRefBarrierSet* mr_bs) : _mr_bs(mr_bs) {} | |
| 1134 bool doHeapRegion(HeapRegion* r) { | |
| 1135 r->reset_gc_time_stamp(); | |
| 1136 if (r->continuesHumongous()) | |
| 1137 return false; | |
| 1138 HeapRegionRemSet* hrrs = r->rem_set(); | |
| 1139 if (hrrs != NULL) hrrs->clear(); | |
| 1140 // You might think here that we could clear just the cards | |
| 1141 // corresponding to the used region. But no: if we leave a dirty card | |
| 1142 // in a region we might allocate into, then it would prevent that card | |
| 1143 // from being enqueued, and cause it to be missed. | |
| 1144 // Re: the performance cost: we shouldn't be doing full GC anyway! | |
| 1145 _mr_bs->clear(MemRegion(r->bottom(), r->end())); | |
| 1146 return false; | |
| 1147 } | |
| 1148 }; | |
| 1149 | |
| 1150 | |
| 1151 class PostMCRemSetInvalidateClosure: public HeapRegionClosure { | |
| 1152 ModRefBarrierSet* _mr_bs; | |
| 1153 public: | |
| 1154 PostMCRemSetInvalidateClosure(ModRefBarrierSet* mr_bs) : _mr_bs(mr_bs) {} | |
| 1155 bool doHeapRegion(HeapRegion* r) { | |
| 1156 if (r->continuesHumongous()) return false; | |
| 1157 if (r->used_region().word_size() != 0) { | |
| 1158 _mr_bs->invalidate(r->used_region(), true /*whole heap*/); | |
| 1159 } | |
| 1160 return false; | |
| 1161 } | |
| 1162 }; | |
| 1163 | |
|
626
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1164 class RebuildRSOutOfRegionClosure: public HeapRegionClosure { |
|
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1165 G1CollectedHeap* _g1h; |
|
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1166 UpdateRSOopClosure _cl; |
|
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1167 int _worker_i; |
|
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1168 public: |
|
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1169 RebuildRSOutOfRegionClosure(G1CollectedHeap* g1, int worker_i = 0) : |
| 1861 | 1170 _cl(g1->g1_rem_set(), worker_i), |
|
626
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1171 _worker_i(worker_i), |
|
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1172 _g1h(g1) |
|
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1173 { } |
|
1960
878b57474103
6978187: G1: assert(ParallelGCThreads> 1 || n_yielded() == _hrrs->occupied()) strikes again
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|
1174 |
|
626
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1175 bool doHeapRegion(HeapRegion* r) { |
|
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1176 if (!r->continuesHumongous()) { |
|
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1177 _cl.set_from(r); |
|
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1178 r->oop_iterate(&_cl); |
|
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1179 } |
|
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1180 return false; |
|
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1181 } |
|
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1182 }; |
|
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1183 |
|
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1184 class ParRebuildRSTask: public AbstractGangTask { |
|
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1185 G1CollectedHeap* _g1; |
|
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1186 public: |
|
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1187 ParRebuildRSTask(G1CollectedHeap* g1) |
|
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1188 : AbstractGangTask("ParRebuildRSTask"), |
|
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1189 _g1(g1) |
|
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1190 { } |
|
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1191 |
|
4728
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|
1192 void work(uint worker_id) { |
|
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1193 RebuildRSOutOfRegionClosure rebuild_rs(_g1, worker_id); |
|
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1194 _g1->heap_region_par_iterate_chunked(&rebuild_rs, worker_id, |
|
4095
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|
1195 _g1->workers()->active_workers(), |
|
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1196 HeapRegion::RebuildRSClaimValue); |
|
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1197 } |
|
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|
1198 }; |
|
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|
1199 |
|
3778
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|
1200 class PostCompactionPrinterClosure: public HeapRegionClosure { |
|
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|
1201 private: |
|
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|
1202 G1HRPrinter* _hr_printer; |
|
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1203 public: |
|
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|
1204 bool doHeapRegion(HeapRegion* hr) { |
|
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|
1205 assert(!hr->is_young(), "not expecting to find young regions"); |
|
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1206 // We only generate output for non-empty regions. |
|
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1207 if (!hr->is_empty()) { |
|
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|
1208 if (!hr->isHumongous()) { |
|
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1209 _hr_printer->post_compaction(hr, G1HRPrinter::Old); |
|
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|
1210 } else if (hr->startsHumongous()) { |
|
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
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changeset
|
1211 if (hr->capacity() == HeapRegion::GrainBytes) { |
|
3778
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1212 // single humongous region |
|
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1213 _hr_printer->post_compaction(hr, G1HRPrinter::SingleHumongous); |
|
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1214 } else { |
|
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1215 _hr_printer->post_compaction(hr, G1HRPrinter::StartsHumongous); |
|
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1216 } |
|
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|
1217 } else { |
|
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|
1218 assert(hr->continuesHumongous(), "only way to get here"); |
|
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1219 _hr_printer->post_compaction(hr, G1HRPrinter::ContinuesHumongous); |
|
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|
1220 } |
|
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|
1221 } |
|
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|
1222 return false; |
|
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|
1223 } |
|
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|
1224 |
|
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|
1225 PostCompactionPrinterClosure(G1HRPrinter* hr_printer) |
|
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|
1226 : _hr_printer(hr_printer) { } |
|
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|
1227 }; |
|
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|
1228 |
| 1973 | 1229 bool G1CollectedHeap::do_collection(bool explicit_gc, |
|
1656
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6944166: G1: explicit GCs are not always handled correctly
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|
1230 bool clear_all_soft_refs, |
| 342 | 1231 size_t word_size) { |
| 2152 | 1232 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1233 | |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
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changeset
|
1234 if (GC_locker::check_active_before_gc()) { |
| 1973 | 1235 return false; |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
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|
1236 } |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
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diff
changeset
|
1237 |
|
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2039
diff
changeset
|
1238 SvcGCMarker sgcm(SvcGCMarker::FULL); |
| 342 | 1239 ResourceMark rm; |
| 1240 | |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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|
1241 if (PrintHeapAtGC) { |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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|
1242 Universe::print_heap_before_gc(); |
|
0316eac49d5a
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|
1243 } |
|
0316eac49d5a
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|
1244 |
| 4072 | 1245 HRSPhaseSetter x(HRSPhaseFullGC); |
| 2152 | 1246 verify_region_sets_optional(); |
| 342 | 1247 |
|
1387
0bfd3fb24150
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|
1248 const bool do_clear_all_soft_refs = clear_all_soft_refs || |
|
0bfd3fb24150
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|
1249 collector_policy()->should_clear_all_soft_refs(); |
|
0bfd3fb24150
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|
1250 |
|
0bfd3fb24150
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|
1251 ClearedAllSoftRefs casr(do_clear_all_soft_refs, collector_policy()); |
|
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1252 |
| 342 | 1253 { |
| 1254 IsGCActiveMark x; | |
| 1255 | |
| 1256 // Timing | |
|
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|
1257 bool system_gc = (gc_cause() == GCCause::_java_lang_system_gc); |
|
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|
1258 assert(!system_gc || explicit_gc, "invariant"); |
| 342 | 1259 gclog_or_tty->date_stamp(PrintGC && PrintGCDateStamps); |
| 1260 TraceCPUTime tcpu(PrintGCDetails, true, gclog_or_tty); | |
|
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|
1261 TraceTime t(system_gc ? "Full GC (System.gc())" : "Full GC", |
|
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|
1262 PrintGC, true, gclog_or_tty); |
| 342 | 1263 |
|
3289
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|
1264 TraceCollectorStats tcs(g1mm()->full_collection_counters()); |
|
3356
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|
1265 TraceMemoryManagerStats tms(true /* fullGC */, gc_cause()); |
|
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|
1266 |
| 342 | 1267 double start = os::elapsedTime(); |
| 1268 g1_policy()->record_full_collection_start(); | |
| 1269 | |
|
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|
1270 // Note: When we have a more flexible GC logging framework that |
|
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1271 // allows us to add optional attributes to a GC log record we |
|
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1272 // could consider timing and reporting how long we wait in the |
|
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|
1273 // following two methods. |
| 2152 | 1274 wait_while_free_regions_coming(); |
|
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|
1275 // If we start the compaction before the CM threads finish |
|
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1276 // scanning the root regions we might trip them over as we'll |
|
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|
1277 // be moving objects / updating references. So let's wait until |
|
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|
1278 // they are done. By telling them to abort, they should complete |
|
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|
1279 // early. |
|
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|
1280 _cm->root_regions()->abort(); |
|
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|
1281 _cm->root_regions()->wait_until_scan_finished(); |
| 2361 | 1282 append_secondary_free_list_if_not_empty_with_lock(); |
| 2152 | 1283 |
| 342 | 1284 gc_prologue(true); |
|
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|
1285 increment_total_collections(true /* full gc */); |
| 342 | 1286 |
| 1287 size_t g1h_prev_used = used(); | |
| 1288 assert(used() == recalculate_used(), "Should be equal"); | |
| 1289 | |
| 1290 if (VerifyBeforeGC && total_collections() >= VerifyGCStartAt) { | |
| 1291 HandleMark hm; // Discard invalid handles created during verification | |
|
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|
1292 gclog_or_tty->print(" VerifyBeforeGC:"); |
| 342 | 1293 prepare_for_verify(); |
|
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|
1294 Universe::verify(/* allow dirty */ true, |
|
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|
1295 /* silent */ false, |
|
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|
1296 /* option */ VerifyOption_G1UsePrevMarking); |
|
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|
1297 |
| 342 | 1298 } |
|
3869
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|
1299 pre_full_gc_dump(); |
| 342 | 1300 |
| 1301 COMPILER2_PRESENT(DerivedPointerTable::clear()); | |
| 1302 | |
|
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|
1303 // Disable discovery and empty the discovered lists |
|
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|
1304 // for the CM ref processor. |
|
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|
1305 ref_processor_cm()->disable_discovery(); |
|
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|
1306 ref_processor_cm()->abandon_partial_discovery(); |
|
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|
1307 ref_processor_cm()->verify_no_references_recorded(); |
| 342 | 1308 |
| 1309 // Abandon current iterations of concurrent marking and concurrent | |
|
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|
1310 // refinement, if any are in progress. We have to do this before |
|
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|
1311 // wait_until_scan_finished() below. |
| 342 | 1312 concurrent_mark()->abort(); |
| 1313 | |
| 1314 // Make sure we'll choose a new allocation region afterwards. | |
|
2433
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|
1315 release_mutator_alloc_region(); |
| 636 | 1316 abandon_gc_alloc_regions(); |
| 1861 | 1317 g1_rem_set()->cleanupHRRS(); |
|
1394
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|
1318 |
|
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|
1319 // We should call this after we retire any currently active alloc |
|
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|
1320 // regions so that all the ALLOC / RETIRE events are generated |
|
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|
1321 // before the start GC event. |
|
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|
1322 _hr_printer.start_gc(true /* full */, (size_t) total_collections()); |
|
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|
1323 |
|
1394
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|
1324 // We may have added regions to the current incremental collection |
|
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|
1325 // set between the last GC or pause and now. We need to clear the |
|
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|
1326 // incremental collection set and then start rebuilding it afresh |
|
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|
1327 // after this full GC. |
|
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|
1328 abandon_collection_set(g1_policy()->inc_cset_head()); |
|
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|
1329 g1_policy()->clear_incremental_cset(); |
|
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|
1330 g1_policy()->stop_incremental_cset_building(); |
|
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|
1331 |
| 4072 | 1332 tear_down_region_sets(false /* free_list_only */); |
| 4710 | 1333 g1_policy()->set_gcs_are_young(true); |
| 342 | 1334 |
|
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|
1335 // See the comments in g1CollectedHeap.hpp and |
|
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|
1336 // G1CollectedHeap::ref_processing_init() about |
|
1974
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diff
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|
1337 // how reference processing currently works in G1. |
|
fd1d227ef1b9
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|
1338 |
|
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|
1339 // Temporarily make discovery by the STW ref processor single threaded (non-MT). |
|
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|
1340 ReferenceProcessorMTDiscoveryMutator stw_rp_disc_ser(ref_processor_stw(), false); |
|
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|
1341 |
|
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|
1342 // Temporarily clear the STW ref processor's _is_alive_non_header field. |
|
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|
1343 ReferenceProcessorIsAliveMutator stw_rp_is_alive_null(ref_processor_stw(), NULL); |
|
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|
1344 |
|
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|
1345 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, true /*verify_no_refs*/); |
|
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|
1346 ref_processor_stw()->setup_policy(do_clear_all_soft_refs); |
|
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|
1347 |
| 342 | 1348 // Do collection work |
| 1349 { | |
| 1350 HandleMark hm; // Discard invalid handles created during gc | |
|
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|
1351 G1MarkSweep::invoke_at_safepoint(ref_processor_stw(), do_clear_all_soft_refs); |
| 342 | 1352 } |
|
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|
1353 |
| 2152 | 1354 assert(free_regions() == 0, "we should not have added any free regions"); |
| 4072 | 1355 rebuild_region_sets(false /* free_list_only */); |
| 342 | 1356 |
|
3979
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|
1357 // Enqueue any discovered reference objects that have |
|
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|
1358 // not been removed from the discovered lists. |
|
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|
1359 ref_processor_stw()->enqueue_discovered_references(); |
| 342 | 1360 |
| 1361 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); | |
| 1362 | |
|
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|
1363 MemoryService::track_memory_usage(); |
|
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|
1364 |
| 342 | 1365 if (VerifyAfterGC && total_collections() >= VerifyGCStartAt) { |
| 1366 HandleMark hm; // Discard invalid handles created during verification | |
| 1367 gclog_or_tty->print(" VerifyAfterGC:"); | |
|
637
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diff
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|
1368 prepare_for_verify(); |
|
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|
1369 Universe::verify(/* allow dirty */ false, |
|
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|
1370 /* silent */ false, |
|
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|
1371 /* option */ VerifyOption_G1UsePrevMarking); |
|
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|
1372 |
| 342 | 1373 } |
|
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|
1374 |
|
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|
1375 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
|
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|
1376 ref_processor_stw()->verify_no_references_recorded(); |
|
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|
1377 |
|
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|
1378 // Note: since we've just done a full GC, concurrent |
|
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|
1379 // marking is no longer active. Therefore we need not |
|
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|
1380 // re-enable reference discovery for the CM ref processor. |
|
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|
1381 // That will be done at the start of the next marking cycle. |
|
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|
1382 assert(!ref_processor_cm()->discovery_enabled(), "Postcondition"); |
|
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|
1383 ref_processor_cm()->verify_no_references_recorded(); |
| 342 | 1384 |
| 1385 reset_gc_time_stamp(); | |
| 1386 // Since everything potentially moved, we will clear all remembered | |
|
626
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|
1387 // sets, and clear all cards. Later we will rebuild remebered |
|
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|
1388 // sets. We will also reset the GC time stamps of the regions. |
| 342 | 1389 PostMCRemSetClearClosure rs_clear(mr_bs()); |
| 1390 heap_region_iterate(&rs_clear); | |
| 1391 | |
| 1392 // Resize the heap if necessary. | |
|
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|
1393 resize_if_necessary_after_full_collection(explicit_gc ? 0 : word_size); |
| 342 | 1394 |
|
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|
1395 if (_hr_printer.is_active()) { |
|
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|
1396 // We should do this after we potentially resize the heap so |
|
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|
1397 // that all the COMMIT / UNCOMMIT events are generated before |
|
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|
1398 // the end GC event. |
|
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|
1399 |
|
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|
1400 PostCompactionPrinterClosure cl(hr_printer()); |
|
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|
1401 heap_region_iterate(&cl); |
|
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|
1402 |
|
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|
1403 _hr_printer.end_gc(true /* full */, (size_t) total_collections()); |
|
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|
1404 } |
|
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|
1405 |
| 342 | 1406 if (_cg1r->use_cache()) { |
| 1407 _cg1r->clear_and_record_card_counts(); | |
| 1408 _cg1r->clear_hot_cache(); | |
| 1409 } | |
| 1410 | |
|
626
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|
1411 // Rebuild remembered sets of all regions. |
|
1833
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6984287: Regularize how GC parallel workers are specified.
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diff
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|
1412 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
4728
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|
1413 uint n_workers = |
|
4095
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|
1414 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
|
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|
1415 workers()->active_workers(), |
|
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1416 Threads::number_of_non_daemon_threads()); |
|
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1417 assert(UseDynamicNumberOfGCThreads || |
|
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1418 n_workers == workers()->total_workers(), |
|
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1419 "If not dynamic should be using all the workers"); |
|
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|
1420 workers()->set_active_workers(n_workers); |
|
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1421 // Set parallel threads in the heap (_n_par_threads) only |
|
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1422 // before a parallel phase and always reset it to 0 after |
|
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1423 // the phase so that the number of parallel threads does |
|
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|
1424 // no get carried forward to a serial phase where there |
|
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1425 // may be code that is "possibly_parallel". |
|
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1426 set_par_threads(n_workers); |
|
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1427 |
|
626
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1428 ParRebuildRSTask rebuild_rs_task(this); |
|
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1429 assert(check_heap_region_claim_values( |
|
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1430 HeapRegion::InitialClaimValue), "sanity check"); |
|
4095
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|
1431 assert(UseDynamicNumberOfGCThreads || |
|
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|
1432 workers()->active_workers() == workers()->total_workers(), |
|
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|
1433 "Unless dynamic should use total workers"); |
|
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1434 // Use the most recent number of active workers |
|
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|
1435 assert(workers()->active_workers() > 0, |
|
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1436 "Active workers not properly set"); |
|
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|
1437 set_par_threads(workers()->active_workers()); |
|
626
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1438 workers()->run_task(&rebuild_rs_task); |
|
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|
1439 set_par_threads(0); |
|
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|
1440 assert(check_heap_region_claim_values( |
|
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1441 HeapRegion::RebuildRSClaimValue), "sanity check"); |
|
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1442 reset_heap_region_claim_values(); |
|
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|
1443 } else { |
|
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|
1444 RebuildRSOutOfRegionClosure rebuild_rs(this); |
|
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1445 heap_region_iterate(&rebuild_rs); |
|
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|
1446 } |
|
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|
1447 |
| 342 | 1448 if (PrintGC) { |
| 1449 print_size_transition(gclog_or_tty, g1h_prev_used, used(), capacity()); | |
| 1450 } | |
| 1451 | |
| 1452 if (true) { // FIXME | |
| 1453 // Ask the permanent generation to adjust size for full collections | |
| 1454 perm()->compute_new_size(); | |
| 1455 } | |
| 1456 | |
|
1394
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|
1457 // Start a new incremental collection set for the next pause |
|
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|
1458 assert(g1_policy()->collection_set() == NULL, "must be"); |
|
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|
1459 g1_policy()->start_incremental_cset_building(); |
|
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|
1460 |
|
1316cec51b4d
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|
1461 // Clear the _cset_fast_test bitmap in anticipation of adding |
|
1316cec51b4d
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|
1462 // regions to the incremental collection set for the next |
|
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|
1463 // evacuation pause. |
|
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|
1464 clear_cset_fast_test(); |
|
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|
1465 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
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|
1466 init_mutator_alloc_region(); |
|
abdfc822206f
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diff
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|
1467 |
| 342 | 1468 double end = os::elapsedTime(); |
| 1469 g1_policy()->record_full_collection_end(); | |
| 1470 | |
|
546
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6690928: Use spinning in combination with yields for workstealing termination.
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|
1471 #ifdef TRACESPINNING |
|
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
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|
1472 ParallelTaskTerminator::print_termination_counts(); |
|
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
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|
1473 #endif |
|
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|
1474 |
| 342 | 1475 gc_epilogue(true); |
| 1476 | |
| 794 | 1477 // Discard all rset updates |
| 1478 JavaThread::dirty_card_queue_set().abandon_logs(); | |
|
616
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6720309: G1: don't synchronously update RSet during evacuation pauses
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|
1479 assert(!G1DeferredRSUpdate |
|
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|
1480 || (G1DeferredRSUpdate && (dirty_card_queue_set().completed_buffers_num() == 0)), "Should not be any"); |
| 342 | 1481 } |
| 1482 | |
|
3867
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|
1483 _young_list->reset_sampled_info(); |
|
ff53346271fe
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|
1484 // At this point there should be no regions in the |
|
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|
1485 // entire heap tagged as young. |
|
ff53346271fe
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|
1486 assert( check_young_list_empty(true /* check_heap */), |
|
ff53346271fe
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diff
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|
1487 "young list should be empty at this point"); |
|
838
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|
1488 |
|
1656
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|
1489 // Update the number of full collections that have been completed. |
|
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
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diff
changeset
|
1490 increment_full_collections_completed(false /* concurrent */); |
|
1656
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parents:
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|
1491 |
| 3766 | 1492 _hrs.verify_optional(); |
| 2152 | 1493 verify_region_sets_optional(); |
| 1494 | |
|
838
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|
1495 if (PrintHeapAtGC) { |
|
0316eac49d5a
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diff
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|
1496 Universe::print_heap_after_gc(); |
|
0316eac49d5a
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|
1497 } |
|
3980
8229bd737950
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|
1498 g1mm()->update_sizes(); |
|
3869
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diff
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|
1499 post_full_gc_dump(); |
| 1973 | 1500 |
| 1501 return true; | |
| 342 | 1502 } |
| 1503 | |
| 1504 void G1CollectedHeap::do_full_collection(bool clear_all_soft_refs) { | |
| 1973 | 1505 // do_collection() will return whether it succeeded in performing |
| 1506 // the GC. Currently, there is no facility on the | |
| 1507 // do_full_collection() API to notify the caller than the collection | |
| 1508 // did not succeed (e.g., because it was locked out by the GC | |
| 1509 // locker). So, right now, we'll ignore the return value. | |
| 1510 bool dummy = do_collection(true, /* explicit_gc */ | |
| 1511 clear_all_soft_refs, | |
| 1512 0 /* word_size */); | |
| 342 | 1513 } |
| 1514 | |
| 1515 // This code is mostly copied from TenuredGeneration. | |
| 1516 void | |
| 1517 G1CollectedHeap:: | |
| 1518 resize_if_necessary_after_full_collection(size_t word_size) { | |
| 1519 assert(MinHeapFreeRatio <= MaxHeapFreeRatio, "sanity check"); | |
| 1520 | |
| 1521 // Include the current allocation, if any, and bytes that will be | |
| 1522 // pre-allocated to support collections, as "used". | |
| 1523 const size_t used_after_gc = used(); | |
| 1524 const size_t capacity_after_gc = capacity(); | |
| 1525 const size_t free_after_gc = capacity_after_gc - used_after_gc; | |
| 1526 | |
|
1717
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|
1527 // This is enforced in arguments.cpp. |
|
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changeset
|
1528 assert(MinHeapFreeRatio <= MaxHeapFreeRatio, |
|
688c3755d7af
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changeset
|
1529 "otherwise the code below doesn't make sense"); |
|
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|
1530 |
| 342 | 1531 // We don't have floating point command-line arguments |
|
1717
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diff
changeset
|
1532 const double minimum_free_percentage = (double) MinHeapFreeRatio / 100.0; |
| 342 | 1533 const double maximum_used_percentage = 1.0 - minimum_free_percentage; |
|
1717
688c3755d7af
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changeset
|
1534 const double maximum_free_percentage = (double) MaxHeapFreeRatio / 100.0; |
| 342 | 1535 const double minimum_used_percentage = 1.0 - maximum_free_percentage; |
| 1536 | |
|
1717
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|
1537 const size_t min_heap_size = collector_policy()->min_heap_byte_size(); |
|
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|
1538 const size_t max_heap_size = collector_policy()->max_heap_byte_size(); |
|
688c3755d7af
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|
1539 |
|
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|
1540 // We have to be careful here as these two calculations can overflow |
|
688c3755d7af
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changeset
|
1541 // 32-bit size_t's. |
|
688c3755d7af
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|
1542 double used_after_gc_d = (double) used_after_gc; |
|
688c3755d7af
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|
1543 double minimum_desired_capacity_d = used_after_gc_d / maximum_used_percentage; |
|
688c3755d7af
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|
1544 double maximum_desired_capacity_d = used_after_gc_d / minimum_used_percentage; |
|
688c3755d7af
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|
1545 |
|
688c3755d7af
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|
1546 // Let's make sure that they are both under the max heap size, which |
|
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
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changeset
|
1547 // by default will make them fit into a size_t. |
|
688c3755d7af
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|
1548 double desired_capacity_upper_bound = (double) max_heap_size; |
|
688c3755d7af
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|
1549 minimum_desired_capacity_d = MIN2(minimum_desired_capacity_d, |
|
688c3755d7af
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|
1550 desired_capacity_upper_bound); |
|
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|
1551 maximum_desired_capacity_d = MIN2(maximum_desired_capacity_d, |
|
688c3755d7af
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|
1552 desired_capacity_upper_bound); |
|
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|
1553 |
|
688c3755d7af
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changeset
|
1554 // We can now safely turn them into size_t's. |
|
688c3755d7af
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|
1555 size_t minimum_desired_capacity = (size_t) minimum_desired_capacity_d; |
|
688c3755d7af
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changeset
|
1556 size_t maximum_desired_capacity = (size_t) maximum_desired_capacity_d; |
|
688c3755d7af
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changeset
|
1557 |
|
688c3755d7af
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changeset
|
1558 // This assert only makes sense here, before we adjust them |
|
688c3755d7af
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changeset
|
1559 // with respect to the min and max heap size. |
|
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
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parents:
1709
diff
changeset
|
1560 assert(minimum_desired_capacity <= maximum_desired_capacity, |
|
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
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diff
changeset
|
1561 err_msg("minimum_desired_capacity = "SIZE_FORMAT", " |
|
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
tonyp
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1709
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changeset
|
1562 "maximum_desired_capacity = "SIZE_FORMAT, |
|
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
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1709
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changeset
|
1563 minimum_desired_capacity, maximum_desired_capacity)); |
|
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
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parents:
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changeset
|
1564 |
|
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
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changeset
|
1565 // Should not be greater than the heap max size. No need to adjust |
|
688c3755d7af
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1566 // it with respect to the heap min size as it's a lower bound (i.e., |
|
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1567 // we'll try to make the capacity larger than it, not smaller). |
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1568 minimum_desired_capacity = MIN2(minimum_desired_capacity, max_heap_size); |
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1569 // Should not be less than the heap min size. No need to adjust it |
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1570 // with respect to the heap max size as it's an upper bound (i.e., |
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1571 // we'll try to make the capacity smaller than it, not greater). |
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1572 maximum_desired_capacity = MAX2(maximum_desired_capacity, min_heap_size); |
| 342 | 1573 |
|
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1574 if (capacity_after_gc < minimum_desired_capacity) { |
| 342 | 1575 // Don't expand unless it's significant |
| 1576 size_t expand_bytes = minimum_desired_capacity - capacity_after_gc; | |
|
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1577 ergo_verbose4(ErgoHeapSizing, |
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1578 "attempt heap expansion", |
|
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1579 ergo_format_reason("capacity lower than " |
|
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1580 "min desired capacity after Full GC") |
|
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1581 ergo_format_byte("capacity") |
|
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1582 ergo_format_byte("occupancy") |
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1583 ergo_format_byte_perc("min desired capacity"), |
|
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1584 capacity_after_gc, used_after_gc, |
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1585 minimum_desired_capacity, (double) MinHeapFreeRatio); |
|
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1586 expand(expand_bytes); |
| 342 | 1587 |
| 1588 // No expansion, now see if we want to shrink | |
|
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1589 } else if (capacity_after_gc > maximum_desired_capacity) { |
| 342 | 1590 // Capacity too large, compute shrinking size |
| 1591 size_t shrink_bytes = capacity_after_gc - maximum_desired_capacity; | |
|
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1592 ergo_verbose4(ErgoHeapSizing, |
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1593 "attempt heap shrinking", |
|
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1594 ergo_format_reason("capacity higher than " |
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1595 "max desired capacity after Full GC") |
|
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1596 ergo_format_byte("capacity") |
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1597 ergo_format_byte("occupancy") |
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1598 ergo_format_byte_perc("max desired capacity"), |
|
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1599 capacity_after_gc, used_after_gc, |
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1600 maximum_desired_capacity, (double) MaxHeapFreeRatio); |
| 342 | 1601 shrink(shrink_bytes); |
| 1602 } | |
| 1603 } | |
| 1604 | |
| 1605 | |
| 1606 HeapWord* | |
| 1973 | 1607 G1CollectedHeap::satisfy_failed_allocation(size_t word_size, |
| 1608 bool* succeeded) { | |
| 2152 | 1609 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1973 | 1610 |
| 1611 *succeeded = true; | |
| 1612 // Let's attempt the allocation first. | |
|
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1613 HeapWord* result = |
|
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1614 attempt_allocation_at_safepoint(word_size, |
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1615 false /* expect_null_mutator_alloc_region */); |
| 1973 | 1616 if (result != NULL) { |
| 1617 assert(*succeeded, "sanity"); | |
| 1618 return result; | |
| 1619 } | |
| 342 | 1620 |
| 1621 // In a G1 heap, we're supposed to keep allocation from failing by | |
| 1622 // incremental pauses. Therefore, at least for now, we'll favor | |
| 1623 // expansion over collection. (This might change in the future if we can | |
| 1624 // do something smarter than full collection to satisfy a failed alloc.) | |
| 1625 result = expand_and_allocate(word_size); | |
| 1626 if (result != NULL) { | |
| 1973 | 1627 assert(*succeeded, "sanity"); |
| 342 | 1628 return result; |
| 1629 } | |
| 1630 | |
| 1973 | 1631 // Expansion didn't work, we'll try to do a Full GC. |
| 1632 bool gc_succeeded = do_collection(false, /* explicit_gc */ | |
| 1633 false, /* clear_all_soft_refs */ | |
| 1634 word_size); | |
| 1635 if (!gc_succeeded) { | |
| 1636 *succeeded = false; | |
| 1637 return NULL; | |
| 1638 } | |
| 1639 | |
| 1640 // Retry the allocation | |
| 1641 result = attempt_allocation_at_safepoint(word_size, | |
|
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1642 true /* expect_null_mutator_alloc_region */); |
| 342 | 1643 if (result != NULL) { |
| 1973 | 1644 assert(*succeeded, "sanity"); |
| 342 | 1645 return result; |
| 1646 } | |
| 1647 | |
| 1973 | 1648 // Then, try a Full GC that will collect all soft references. |
| 1649 gc_succeeded = do_collection(false, /* explicit_gc */ | |
| 1650 true, /* clear_all_soft_refs */ | |
| 1651 word_size); | |
| 1652 if (!gc_succeeded) { | |
| 1653 *succeeded = false; | |
| 1654 return NULL; | |
| 1655 } | |
| 1656 | |
| 1657 // Retry the allocation once more | |
| 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 | |
|
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1665 assert(!collector_policy()->should_clear_all_soft_refs(), |
| 1973 | 1666 "Flag should have been handled and cleared prior to this point"); |
|
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1667 |
| 342 | 1668 // What else? We might try synchronous finalization later. If the total |
| 1669 // space available is large enough for the allocation, then a more | |
| 1670 // complete compaction phase than we've tried so far might be | |
| 1671 // appropriate. | |
| 1973 | 1672 assert(*succeeded, "sanity"); |
| 342 | 1673 return NULL; |
| 1674 } | |
| 1675 | |
| 1676 // Attempting to expand the heap sufficiently | |
| 1677 // to support an allocation of the given "word_size". If | |
| 1678 // successful, perform the allocation and return the address of the | |
| 1679 // allocated block, or else "NULL". | |
| 1680 | |
| 1681 HeapWord* G1CollectedHeap::expand_and_allocate(size_t word_size) { | |
| 2152 | 1682 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1683 | |
| 1684 verify_region_sets_optional(); | |
| 1973 | 1685 |
|
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1686 size_t expand_bytes = MAX2(word_size * HeapWordSize, MinHeapDeltaBytes); |
|
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1687 ergo_verbose1(ErgoHeapSizing, |
|
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1688 "attempt heap expansion", |
|
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|
1689 ergo_format_reason("allocation request failed") |
|
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1690 ergo_format_byte("allocation request"), |
|
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1691 word_size * HeapWordSize); |
|
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1692 if (expand(expand_bytes)) { |
| 3766 | 1693 _hrs.verify_optional(); |
|
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1694 verify_region_sets_optional(); |
|
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1695 return attempt_allocation_at_safepoint(word_size, |
|
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1696 false /* expect_null_mutator_alloc_region */); |
|
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1697 } |
|
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|
1698 return NULL; |
| 342 | 1699 } |
| 1700 | |
| 3766 | 1701 void G1CollectedHeap::update_committed_space(HeapWord* old_end, |
| 1702 HeapWord* new_end) { | |
| 1703 assert(old_end != new_end, "don't call this otherwise"); | |
| 1704 assert((HeapWord*) _g1_storage.high() == new_end, "invariant"); | |
| 1705 | |
| 1706 // Update the committed mem region. | |
| 1707 _g1_committed.set_end(new_end); | |
| 1708 // Tell the card table about the update. | |
| 1709 Universe::heap()->barrier_set()->resize_covered_region(_g1_committed); | |
| 1710 // Tell the BOT about the update. | |
| 1711 _bot_shared->resize(_g1_committed.word_size()); | |
| 1712 } | |
| 1713 | |
|
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1714 bool G1CollectedHeap::expand(size_t expand_bytes) { |
| 342 | 1715 size_t old_mem_size = _g1_storage.committed_size(); |
|
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1716 size_t aligned_expand_bytes = ReservedSpace::page_align_size_up(expand_bytes); |
| 342 | 1717 aligned_expand_bytes = align_size_up(aligned_expand_bytes, |
| 1718 HeapRegion::GrainBytes); | |
|
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1719 ergo_verbose2(ErgoHeapSizing, |
|
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1720 "expand the heap", |
|
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|
1721 ergo_format_byte("requested expansion amount") |
|
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|
1722 ergo_format_byte("attempted expansion amount"), |
|
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|
1723 expand_bytes, aligned_expand_bytes); |
|
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|
1724 |
| 3766 | 1725 // First commit the memory. |
| 1726 HeapWord* old_end = (HeapWord*) _g1_storage.high(); | |
|
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1727 bool successful = _g1_storage.expand_by(aligned_expand_bytes); |
|
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|
1728 if (successful) { |
| 3766 | 1729 // Then propagate this update to the necessary data structures. |
| 1730 HeapWord* new_end = (HeapWord*) _g1_storage.high(); | |
| 1731 update_committed_space(old_end, new_end); | |
| 1732 | |
| 1733 FreeRegionList expansion_list("Local Expansion List"); | |
| 1734 MemRegion mr = _hrs.expand_by(old_end, new_end, &expansion_list); | |
| 1735 assert(mr.start() == old_end, "post-condition"); | |
| 1736 // mr might be a smaller region than what was requested if | |
| 1737 // expand_by() was unable to allocate the HeapRegion instances | |
| 1738 assert(mr.end() <= new_end, "post-condition"); | |
| 1739 | |
| 1740 size_t actual_expand_bytes = mr.byte_size(); | |
| 1741 assert(actual_expand_bytes <= aligned_expand_bytes, "post-condition"); | |
| 1742 assert(actual_expand_bytes == expansion_list.total_capacity_bytes(), | |
| 1743 "post-condition"); | |
| 1744 if (actual_expand_bytes < aligned_expand_bytes) { | |
| 1745 // We could not expand _hrs to the desired size. In this case we | |
| 1746 // need to shrink the committed space accordingly. | |
| 1747 assert(mr.end() < new_end, "invariant"); | |
| 1748 | |
| 1749 size_t diff_bytes = aligned_expand_bytes - actual_expand_bytes; | |
| 1750 // First uncommit the memory. | |
| 1751 _g1_storage.shrink_by(diff_bytes); | |
| 1752 // Then propagate this update to the necessary data structures. | |
| 1753 update_committed_space(new_end, mr.end()); | |
|
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|
1754 } |
| 3766 | 1755 _free_list.add_as_tail(&expansion_list); |
|
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1756 |
|
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|
1757 if (_hr_printer.is_active()) { |
|
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|
1758 HeapWord* curr = mr.start(); |
|
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|
1759 while (curr < mr.end()) { |
|
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|
1760 HeapWord* curr_end = curr + HeapRegion::GrainWords; |
|
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|
1761 _hr_printer.commit(curr, curr_end); |
|
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|
1762 curr = curr_end; |
|
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|
1763 } |
|
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|
1764 assert(curr == mr.end(), "post-condition"); |
|
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|
1765 } |
|
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1766 g1_policy()->record_new_heap_size(n_regions()); |
|
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1767 } else { |
|
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1768 ergo_verbose0(ErgoHeapSizing, |
|
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1769 "did not expand the heap", |
|
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|
1770 ergo_format_reason("heap expansion operation failed")); |
|
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1771 // The expansion of the virtual storage space was unsuccessful. |
|
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1772 // Let's see if it was because we ran out of swap. |
|
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1773 if (G1ExitOnExpansionFailure && |
|
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1774 _g1_storage.uncommitted_size() >= aligned_expand_bytes) { |
|
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1775 // We had head room... |
|
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1776 vm_exit_out_of_memory(aligned_expand_bytes, "G1 heap expansion"); |
| 342 | 1777 } |
| 1778 } | |
|
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1779 return successful; |
| 342 | 1780 } |
| 1781 | |
| 3766 | 1782 void G1CollectedHeap::shrink_helper(size_t shrink_bytes) { |
| 342 | 1783 size_t old_mem_size = _g1_storage.committed_size(); |
| 1784 size_t aligned_shrink_bytes = | |
| 1785 ReservedSpace::page_align_size_down(shrink_bytes); | |
| 1786 aligned_shrink_bytes = align_size_down(aligned_shrink_bytes, | |
| 1787 HeapRegion::GrainBytes); | |
| 1788 size_t num_regions_deleted = 0; | |
| 3766 | 1789 MemRegion mr = _hrs.shrink_by(aligned_shrink_bytes, &num_regions_deleted); |
| 1790 HeapWord* old_end = (HeapWord*) _g1_storage.high(); | |
| 1791 assert(mr.end() == old_end, "post-condition"); | |
|
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1792 |
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1793 ergo_verbose3(ErgoHeapSizing, |
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1794 "shrink the heap", |
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1795 ergo_format_byte("requested shrinking amount") |
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1796 ergo_format_byte("aligned shrinking amount") |
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1797 ergo_format_byte("attempted shrinking amount"), |
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1798 shrink_bytes, aligned_shrink_bytes, mr.byte_size()); |
| 3766 | 1799 if (mr.byte_size() > 0) { |
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1800 if (_hr_printer.is_active()) { |
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1801 HeapWord* curr = mr.end(); |
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1802 while (curr > mr.start()) { |
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1803 HeapWord* curr_end = curr; |
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1804 curr -= HeapRegion::GrainWords; |
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1805 _hr_printer.uncommit(curr, curr_end); |
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1806 } |
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1807 assert(curr == mr.start(), "post-condition"); |
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1808 } |
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1809 |
| 342 | 1810 _g1_storage.shrink_by(mr.byte_size()); |
| 3766 | 1811 HeapWord* new_end = (HeapWord*) _g1_storage.high(); |
| 1812 assert(mr.start() == new_end, "post-condition"); | |
| 1813 | |
| 1814 _expansion_regions += num_regions_deleted; | |
| 1815 update_committed_space(old_end, new_end); | |
| 1816 HeapRegionRemSet::shrink_heap(n_regions()); | |
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1817 g1_policy()->record_new_heap_size(n_regions()); |
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1818 } else { |
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1819 ergo_verbose0(ErgoHeapSizing, |
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1820 "did not shrink the heap", |
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1821 ergo_format_reason("heap shrinking operation failed")); |
| 342 | 1822 } |
| 1823 } | |
| 1824 | |
| 1825 void G1CollectedHeap::shrink(size_t shrink_bytes) { | |
| 2152 | 1826 verify_region_sets_optional(); |
| 1827 | |
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1828 // We should only reach here at the end of a Full GC which means we |
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1829 // should not not be holding to any GC alloc regions. The method |
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1830 // below will make sure of that and do any remaining clean up. |
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1831 abandon_gc_alloc_regions(); |
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1832 |
| 2152 | 1833 // Instead of tearing down / rebuilding the free lists here, we |
| 1834 // could instead use the remove_all_pending() method on free_list to | |
| 1835 // remove only the ones that we need to remove. | |
| 4072 | 1836 tear_down_region_sets(true /* free_list_only */); |
| 342 | 1837 shrink_helper(shrink_bytes); |
| 4072 | 1838 rebuild_region_sets(true /* free_list_only */); |
| 2152 | 1839 |
| 3766 | 1840 _hrs.verify_optional(); |
| 2152 | 1841 verify_region_sets_optional(); |
| 342 | 1842 } |
| 1843 | |
| 1844 // Public methods. | |
| 1845 | |
| 1846 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away | |
| 1847 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list | |
| 1848 #endif // _MSC_VER | |
| 1849 | |
| 1850 | |
| 1851 G1CollectedHeap::G1CollectedHeap(G1CollectorPolicy* policy_) : | |
| 1852 SharedHeap(policy_), | |
| 1853 _g1_policy(policy_), | |
| 1111 | 1854 _dirty_card_queue_set(false), |
| 1705 | 1855 _into_cset_dirty_card_queue_set(false), |
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1856 _is_alive_closure_cm(this), |
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1857 _is_alive_closure_stw(this), |
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1858 _ref_processor_cm(NULL), |
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1859 _ref_processor_stw(NULL), |
| 342 | 1860 _process_strong_tasks(new SubTasksDone(G1H_PS_NumElements)), |
| 1861 _bot_shared(NULL), | |
| 1862 _objs_with_preserved_marks(NULL), _preserved_marks_of_objs(NULL), | |
| 1863 _evac_failure_scan_stack(NULL) , | |
| 1864 _mark_in_progress(false), | |
| 2152 | 1865 _cg1r(NULL), _summary_bytes_used(0), |
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1866 _g1mm(NULL), |
| 342 | 1867 _refine_cte_cl(NULL), |
| 1868 _full_collection(false), | |
| 2152 | 1869 _free_list("Master Free List"), |
| 1870 _secondary_free_list("Secondary Free List"), | |
| 4072 | 1871 _old_set("Old Set"), |
| 2152 | 1872 _humongous_set("Master Humongous Set"), |
| 1873 _free_regions_coming(false), | |
| 342 | 1874 _young_list(new YoungList(this)), |
| 1875 _gc_time_stamp(0), | |
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1876 _retained_old_gc_alloc_region(NULL), |
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1877 _expand_heap_after_alloc_failure(true), |
| 526 | 1878 _surviving_young_words(NULL), |
|
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1879 _full_collections_completed(0), |
| 526 | 1880 _in_cset_fast_test(NULL), |
|
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1881 _in_cset_fast_test_base(NULL), |
|
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1882 _dirty_cards_region_list(NULL), |
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1883 _worker_cset_start_region(NULL), |
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1884 _worker_cset_start_region_time_stamp(NULL) { |
| 342 | 1885 _g1h = this; // To catch bugs. |
| 1886 if (_process_strong_tasks == NULL || !_process_strong_tasks->valid()) { | |
| 1887 vm_exit_during_initialization("Failed necessary allocation."); | |
| 1888 } | |
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1889 |
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1890 _humongous_object_threshold_in_words = HeapRegion::GrainWords / 2; |
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1891 |
| 342 | 1892 int n_queues = MAX2((int)ParallelGCThreads, 1); |
| 1893 _task_queues = new RefToScanQueueSet(n_queues); | |
| 1894 | |
| 1895 int n_rem_sets = HeapRegionRemSet::num_par_rem_sets(); | |
| 1896 assert(n_rem_sets > 0, "Invariant."); | |
| 1897 | |
| 1898 HeapRegionRemSetIterator** iter_arr = | |
| 1899 NEW_C_HEAP_ARRAY(HeapRegionRemSetIterator*, n_queues); | |
| 1900 for (int i = 0; i < n_queues; i++) { | |
| 1901 iter_arr[i] = new HeapRegionRemSetIterator(); | |
| 1902 } | |
| 1903 _rem_set_iterator = iter_arr; | |
| 1904 | |
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1905 _worker_cset_start_region = NEW_C_HEAP_ARRAY(HeapRegion*, n_queues); |
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1906 _worker_cset_start_region_time_stamp = NEW_C_HEAP_ARRAY(unsigned int, n_queues); |
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1907 |
| 342 | 1908 for (int i = 0; i < n_queues; i++) { |
| 1909 RefToScanQueue* q = new RefToScanQueue(); | |
| 1910 q->initialize(); | |
| 1911 _task_queues->register_queue(i, q); | |
| 1912 } | |
| 1913 | |
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1914 clear_cset_start_regions(); |
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1915 |
| 342 | 1916 guarantee(_task_queues != NULL, "task_queues allocation failure."); |
| 1917 } | |
| 1918 | |
| 1919 jint G1CollectedHeap::initialize() { | |
| 1166 | 1920 CollectedHeap::pre_initialize(); |
| 342 | 1921 os::enable_vtime(); |
| 1922 | |
| 1923 // Necessary to satisfy locking discipline assertions. | |
| 1924 | |
| 1925 MutexLocker x(Heap_lock); | |
| 1926 | |
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1927 // We have to initialize the printer before committing the heap, as |
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1928 // it will be used then. |
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1929 _hr_printer.set_active(G1PrintHeapRegions); |
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1930 |
| 342 | 1931 // While there are no constraints in the GC code that HeapWordSize |
| 1932 // be any particular value, there are multiple other areas in the | |
| 1933 // system which believe this to be true (e.g. oop->object_size in some | |
| 1934 // cases incorrectly returns the size in wordSize units rather than | |
| 1935 // HeapWordSize). | |
| 1936 guarantee(HeapWordSize == wordSize, "HeapWordSize must equal wordSize"); | |
| 1937 | |
| 1938 size_t init_byte_size = collector_policy()->initial_heap_byte_size(); | |
| 1939 size_t max_byte_size = collector_policy()->max_heap_byte_size(); | |
| 1940 | |
| 1941 // Ensure that the sizes are properly aligned. | |
| 1942 Universe::check_alignment(init_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
| 1943 Universe::check_alignment(max_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
| 1944 | |
| 1945 _cg1r = new ConcurrentG1Refine(); | |
| 1946 | |
| 1947 // Reserve the maximum. | |
| 1948 PermanentGenerationSpec* pgs = collector_policy()->permanent_generation(); | |
| 1949 // Includes the perm-gen. | |
|
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1950 |
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1951 // When compressed oops are enabled, the preferred heap base |
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1952 // is calculated by subtracting the requested size from the |
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1953 // 32Gb boundary and using the result as the base address for |
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1954 // heap reservation. If the requested size is not aligned to |
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1955 // HeapRegion::GrainBytes (i.e. the alignment that is passed |
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1956 // into the ReservedHeapSpace constructor) then the actual |
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1957 // base of the reserved heap may end up differing from the |
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1958 // address that was requested (i.e. the preferred heap base). |
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1959 // If this happens then we could end up using a non-optimal |
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1960 // compressed oops mode. |
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1961 |
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1962 // Since max_byte_size is aligned to the size of a heap region (checked |
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1963 // above), we also need to align the perm gen size as it might not be. |
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1964 const size_t total_reserved = max_byte_size + |
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1965 align_size_up(pgs->max_size(), HeapRegion::GrainBytes); |
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1966 Universe::check_alignment(total_reserved, HeapRegion::GrainBytes, "g1 heap and perm"); |
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1967 |
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1968 char* addr = Universe::preferred_heap_base(total_reserved, Universe::UnscaledNarrowOop); |
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1969 |
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1970 ReservedHeapSpace heap_rs(total_reserved, HeapRegion::GrainBytes, |
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1971 UseLargePages, addr); |
|
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1972 |
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1973 if (UseCompressedOops) { |
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1974 if (addr != NULL && !heap_rs.is_reserved()) { |
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1975 // Failed to reserve at specified address - the requested memory |
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1976 // region is taken already, for example, by 'java' launcher. |
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1977 // Try again to reserver heap higher. |
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1978 addr = Universe::preferred_heap_base(total_reserved, Universe::ZeroBasedNarrowOop); |
|
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1979 |
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1980 ReservedHeapSpace heap_rs0(total_reserved, HeapRegion::GrainBytes, |
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1981 UseLargePages, addr); |
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1982 |
|
642
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1983 if (addr != NULL && !heap_rs0.is_reserved()) { |
|
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|
1984 // Failed to reserve at specified address again - give up. |
|
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|
1985 addr = Universe::preferred_heap_base(total_reserved, Universe::HeapBasedNarrowOop); |
|
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|
1986 assert(addr == NULL, ""); |
|
3824
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
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|
1987 |
|
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
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parents:
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|
1988 ReservedHeapSpace heap_rs1(total_reserved, HeapRegion::GrainBytes, |
|
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
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|
1989 UseLargePages, addr); |
|
642
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|
1990 heap_rs = heap_rs1; |
|
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|
1991 } else { |
|
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|
1992 heap_rs = heap_rs0; |
|
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|
1993 } |
|
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|
1994 } |
|
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|
1995 } |
| 342 | 1996 |
| 1997 if (!heap_rs.is_reserved()) { | |
| 1998 vm_exit_during_initialization("Could not reserve enough space for object heap"); | |
| 1999 return JNI_ENOMEM; | |
| 2000 } | |
| 2001 | |
| 2002 // It is important to do this in a way such that concurrent readers can't | |
| 2003 // temporarily think somethings in the heap. (I've actually seen this | |
| 2004 // happen in asserts: DLD.) | |
| 2005 _reserved.set_word_size(0); | |
| 2006 _reserved.set_start((HeapWord*)heap_rs.base()); | |
| 2007 _reserved.set_end((HeapWord*)(heap_rs.base() + heap_rs.size())); | |
| 2008 | |
| 2009 _expansion_regions = max_byte_size/HeapRegion::GrainBytes; | |
| 2010 | |
| 2011 // Create the gen rem set (and barrier set) for the entire reserved region. | |
| 2012 _rem_set = collector_policy()->create_rem_set(_reserved, 2); | |
| 2013 set_barrier_set(rem_set()->bs()); | |
| 2014 if (barrier_set()->is_a(BarrierSet::ModRef)) { | |
| 2015 _mr_bs = (ModRefBarrierSet*)_barrier_set; | |
| 2016 } else { | |
| 2017 vm_exit_during_initialization("G1 requires a mod ref bs."); | |
| 2018 return JNI_ENOMEM; | |
| 2019 } | |
| 2020 | |
| 2021 // Also create a G1 rem set. | |
| 1861 | 2022 if (mr_bs()->is_a(BarrierSet::CardTableModRef)) { |
| 2023 _g1_rem_set = new G1RemSet(this, (CardTableModRefBS*)mr_bs()); | |
| 342 | 2024 } else { |
| 1861 | 2025 vm_exit_during_initialization("G1 requires a cardtable mod ref bs."); |
| 2026 return JNI_ENOMEM; | |
| 342 | 2027 } |
| 2028 | |
| 2029 // Carve out the G1 part of the heap. | |
| 2030 | |
| 2031 ReservedSpace g1_rs = heap_rs.first_part(max_byte_size); | |
| 2032 _g1_reserved = MemRegion((HeapWord*)g1_rs.base(), | |
| 2033 g1_rs.size()/HeapWordSize); | |
| 2034 ReservedSpace perm_gen_rs = heap_rs.last_part(max_byte_size); | |
| 2035 | |
| 2036 _perm_gen = pgs->init(perm_gen_rs, pgs->init_size(), rem_set()); | |
| 2037 | |
| 2038 _g1_storage.initialize(g1_rs, 0); | |
| 2039 _g1_committed = MemRegion((HeapWord*)_g1_storage.low(), (size_t) 0); | |
| 3766 | 2040 _hrs.initialize((HeapWord*) _g1_reserved.start(), |
| 2041 (HeapWord*) _g1_reserved.end(), | |
| 2042 _expansion_regions); | |
| 342 | 2043 |
|
807
d44bdab1c03d
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|
2044 // 6843694 - ensure that the maximum region index can fit |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
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|
2045 // in the remembered set structures. |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
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diff
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|
2046 const size_t max_region_idx = ((size_t)1 << (sizeof(RegionIdx_t)*BitsPerByte-1)) - 1; |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
changeset
|
2047 guarantee((max_regions() - 1) <= max_region_idx, "too many regions"); |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
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|
2048 |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
changeset
|
2049 size_t max_cards_per_region = ((size_t)1 << (sizeof(CardIdx_t)*BitsPerByte-1)) - 1; |
|
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
941
diff
changeset
|
2050 guarantee(HeapRegion::CardsPerRegion > 0, "make sure it's initialized"); |
|
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3983
diff
changeset
|
2051 guarantee(HeapRegion::CardsPerRegion < max_cards_per_region, |
|
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
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diff
changeset
|
2052 "too many cards per region"); |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
changeset
|
2053 |
| 2152 | 2054 HeapRegionSet::set_unrealistically_long_length(max_regions() + 1); |
| 2055 | |
| 342 | 2056 _bot_shared = new G1BlockOffsetSharedArray(_reserved, |
| 2057 heap_word_size(init_byte_size)); | |
| 2058 | |
| 2059 _g1h = this; | |
| 2060 | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2061 _in_cset_fast_test_length = max_regions(); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2062 _in_cset_fast_test_base = NEW_C_HEAP_ARRAY(bool, _in_cset_fast_test_length); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2063 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2064 // We're biasing _in_cset_fast_test to avoid subtracting the |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2065 // beginning of the heap every time we want to index; basically |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2066 // it's the same with what we do with the card table. |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2067 _in_cset_fast_test = _in_cset_fast_test_base - |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2068 ((size_t) _g1_reserved.start() >> HeapRegion::LogOfHRGrainBytes); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2069 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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1391
diff
changeset
|
2070 // 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
|
2071 // regions to the incremental collection set for the first |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
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diff
changeset
|
2072 // evacuation pause. |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2073 clear_cset_fast_test(); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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1391
diff
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|
2074 |
| 342 | 2075 // Create the ConcurrentMark data structure and thread. |
| 2076 // (Must do this late, so that "max_regions" is defined.) | |
| 2077 _cm = new ConcurrentMark(heap_rs, (int) max_regions()); | |
| 2078 _cmThread = _cm->cmThread(); | |
| 2079 | |
| 2080 // Initialize the from_card cache structure of HeapRegionRemSet. | |
| 2081 HeapRegionRemSet::init_heap(max_regions()); | |
| 2082 | |
| 677 | 2083 // Now expand into the initial heap size. |
|
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2084 if (!expand(init_byte_size)) { |
|
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2085 vm_exit_during_initialization("Failed to allocate initial heap."); |
|
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2086 return JNI_ENOMEM; |
|
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2087 } |
| 342 | 2088 |
| 2089 // Perform any initialization actions delegated to the policy. | |
| 2090 g1_policy()->init(); | |
| 2091 | |
| 2092 _refine_cte_cl = | |
| 2093 new RefineCardTableEntryClosure(ConcurrentG1RefineThread::sts(), | |
| 2094 g1_rem_set(), | |
| 2095 concurrent_g1_refine()); | |
| 2096 JavaThread::dirty_card_queue_set().set_closure(_refine_cte_cl); | |
| 2097 | |
| 2098 JavaThread::satb_mark_queue_set().initialize(SATB_Q_CBL_mon, | |
| 2099 SATB_Q_FL_lock, | |
| 1111 | 2100 G1SATBProcessCompletedThreshold, |
| 342 | 2101 Shared_SATB_Q_lock); |
| 794 | 2102 |
| 2103 JavaThread::dirty_card_queue_set().initialize(DirtyCardQ_CBL_mon, | |
| 2104 DirtyCardQ_FL_lock, | |
| 1111 | 2105 concurrent_g1_refine()->yellow_zone(), |
| 2106 concurrent_g1_refine()->red_zone(), | |
| 794 | 2107 Shared_DirtyCardQ_lock); |
| 2108 | |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2109 if (G1DeferredRSUpdate) { |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2110 dirty_card_queue_set().initialize(DirtyCardQ_CBL_mon, |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2111 DirtyCardQ_FL_lock, |
| 1111 | 2112 -1, // never trigger processing |
| 2113 -1, // no limit on length | |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2114 Shared_DirtyCardQ_lock, |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2115 &JavaThread::dirty_card_queue_set()); |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2116 } |
| 1705 | 2117 |
| 2118 // Initialize the card queue set used to hold cards containing | |
| 2119 // references into the collection set. | |
| 2120 _into_cset_dirty_card_queue_set.initialize(DirtyCardQ_CBL_mon, | |
| 2121 DirtyCardQ_FL_lock, | |
| 2122 -1, // never trigger processing | |
| 2123 -1, // no limit on length | |
| 2124 Shared_DirtyCardQ_lock, | |
| 2125 &JavaThread::dirty_card_queue_set()); | |
| 2126 | |
| 342 | 2127 // In case we're keeping closure specialization stats, initialize those |
| 2128 // counts and that mechanism. | |
| 2129 SpecializationStats::clear(); | |
| 2130 | |
| 2131 // Do later initialization work for concurrent refinement. | |
| 2132 _cg1r->init(); | |
| 2133 | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2134 // Here we allocate the dummy full region that is required by the |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2135 // G1AllocRegion class. If we don't pass an address in the reserved |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2136 // space here, lots of asserts fire. |
| 3766 | 2137 |
| 2138 HeapRegion* dummy_region = new_heap_region(0 /* index of bottom region */, | |
| 2139 _g1_reserved.start()); | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2140 // We'll re-use the same region whether the alloc region will |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2141 // require BOT updates or not and, if it doesn't, then a non-young |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2142 // region will complain that it cannot support allocations without |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2143 // BOT updates. So we'll tag the dummy region as young to avoid that. |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2144 dummy_region->set_young(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2145 // Make sure it's full. |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2146 dummy_region->set_top(dummy_region->end()); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2147 G1AllocRegion::setup(this, dummy_region); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2148 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2149 init_mutator_alloc_region(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2150 |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
2151 // Do create of the monitoring and management support so that |
|
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
2152 // values in the heap have been properly initialized. |
|
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
2153 _g1mm = new G1MonitoringSupport(this); |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
2154 |
| 342 | 2155 return JNI_OK; |
| 2156 } | |
| 2157 | |
| 2158 void G1CollectedHeap::ref_processing_init() { | |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
2159 // Reference processing in G1 currently works as follows: |
|
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
2160 // |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2161 // * There are two reference processor instances. One is |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2162 // used to record and process discovered references |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2163 // during concurrent marking; the other is used to |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2164 // record and process references during STW pauses |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2165 // (both full and incremental). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2166 // * Both ref processors need to 'span' the entire heap as |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2167 // the regions in the collection set may be dotted around. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2168 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2169 // * For the concurrent marking ref processor: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2170 // * Reference discovery is enabled at initial marking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2171 // * Reference discovery is disabled and the discovered |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2172 // references processed etc during remarking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2173 // * Reference discovery is MT (see below). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2174 // * Reference discovery requires a barrier (see below). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2175 // * Reference processing may or may not be MT |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2176 // (depending on the value of ParallelRefProcEnabled |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2177 // and ParallelGCThreads). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2178 // * A full GC disables reference discovery by the CM |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2179 // ref processor and abandons any entries on it's |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2180 // discovered lists. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2181 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2182 // * For the STW processor: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
2183 // * Non MT discovery is enabled at the start of a full GC. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
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|
2184 // * Processing and enqueueing during a full GC is non-MT. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2185 // * During a full GC, references are processed after marking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
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|
2186 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2187 // * Discovery (may or may not be MT) is enabled at the start |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
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|
2188 // of an incremental evacuation pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2189 // * References are processed near the end of a STW evacuation pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2190 // * For both types of GC: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2191 // * Discovery is atomic - i.e. not concurrent. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2192 // * Reference discovery will not need a barrier. |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
2193 |
| 342 | 2194 SharedHeap::ref_processing_init(); |
| 2195 MemRegion mr = reserved_region(); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2196 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2197 // Concurrent Mark ref processor |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2198 _ref_processor_cm = |
|
2369
92da084fefc9
6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads
ysr
parents:
2361
diff
changeset
|
2199 new ReferenceProcessor(mr, // span |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2200 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2201 // mt processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2202 (int) ParallelGCThreads, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2203 // degree of mt processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2204 (ParallelGCThreads > 1) || (ConcGCThreads > 1), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2205 // mt discovery |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2206 (int) MAX2(ParallelGCThreads, ConcGCThreads), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2207 // degree of mt discovery |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2208 false, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2209 // Reference discovery is not atomic |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2210 &_is_alive_closure_cm, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2211 // is alive closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2212 // (for efficiency/performance) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2213 true); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2214 // Setting next fields of discovered |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2215 // lists requires a barrier. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2216 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2217 // STW ref processor |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2218 _ref_processor_stw = |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2219 new ReferenceProcessor(mr, // span |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2220 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2221 // mt processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2222 MAX2((int)ParallelGCThreads, 1), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2223 // degree of mt processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2224 (ParallelGCThreads > 1), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2225 // mt discovery |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2226 MAX2((int)ParallelGCThreads, 1), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2227 // degree of mt discovery |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2228 true, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2229 // Reference discovery is atomic |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2230 &_is_alive_closure_stw, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2231 // is alive closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2232 // (for efficiency/performance) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2233 false); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2234 // Setting next fields of discovered |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2235 // lists requires a barrier. |
| 342 | 2236 } |
| 2237 | |
| 2238 size_t G1CollectedHeap::capacity() const { | |
| 2239 return _g1_committed.byte_size(); | |
| 2240 } | |
| 2241 | |
| 1705 | 2242 void G1CollectedHeap::iterate_dirty_card_closure(CardTableEntryClosure* cl, |
| 2243 DirtyCardQueue* into_cset_dcq, | |
| 2244 bool concurrent, | |
| 342 | 2245 int worker_i) { |
| 889 | 2246 // Clean cards in the hot card cache |
| 1705 | 2247 concurrent_g1_refine()->clean_up_cache(worker_i, g1_rem_set(), into_cset_dcq); |
| 889 | 2248 |
| 342 | 2249 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); |
| 2250 int n_completed_buffers = 0; | |
| 1705 | 2251 while (dcqs.apply_closure_to_completed_buffer(cl, worker_i, 0, true)) { |
| 342 | 2252 n_completed_buffers++; |
| 2253 } | |
| 2254 g1_policy()->record_update_rs_processed_buffers(worker_i, | |
| 2255 (double) n_completed_buffers); | |
| 2256 dcqs.clear_n_completed_buffers(); | |
| 2257 assert(!dcqs.completed_buffers_exist_dirty(), "Completed buffers exist!"); | |
| 2258 } | |
| 2259 | |
| 2260 | |
| 2261 // Computes the sum of the storage used by the various regions. | |
| 2262 | |
| 2263 size_t G1CollectedHeap::used() const { | |
|
862
36b5611220a7
6863216: Clean up debugging debris inadvertently pushed with 6700789
ysr
parents:
861
diff
changeset
|
2264 assert(Heap_lock->owner() != NULL, |
|
36b5611220a7
6863216: Clean up debugging debris inadvertently pushed with 6700789
ysr
parents:
861
diff
changeset
|
2265 "Should be owned on this thread's behalf."); |
| 342 | 2266 size_t result = _summary_bytes_used; |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2267 // Read only once in case it is set to NULL concurrently |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2268 HeapRegion* hr = _mutator_alloc_region.get(); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2269 if (hr != NULL) |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2270 result += hr->used(); |
| 342 | 2271 return result; |
| 2272 } | |
| 2273 | |
|
846
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2274 size_t G1CollectedHeap::used_unlocked() const { |
|
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2275 size_t result = _summary_bytes_used; |
|
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2276 return result; |
|
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2277 } |
|
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2278 |
| 342 | 2279 class SumUsedClosure: public HeapRegionClosure { |
| 2280 size_t _used; | |
| 2281 public: | |
| 2282 SumUsedClosure() : _used(0) {} | |
| 2283 bool doHeapRegion(HeapRegion* r) { | |
| 2284 if (!r->continuesHumongous()) { | |
| 2285 _used += r->used(); | |
| 2286 } | |
| 2287 return false; | |
| 2288 } | |
| 2289 size_t result() { return _used; } | |
| 2290 }; | |
| 2291 | |
| 2292 size_t G1CollectedHeap::recalculate_used() const { | |
| 2293 SumUsedClosure blk; | |
| 3766 | 2294 heap_region_iterate(&blk); |
| 342 | 2295 return blk.result(); |
| 2296 } | |
| 2297 | |
| 2298 size_t G1CollectedHeap::unsafe_max_alloc() { | |
| 2152 | 2299 if (free_regions() > 0) return HeapRegion::GrainBytes; |
| 342 | 2300 // otherwise, is there space in the current allocation region? |
| 2301 | |
| 2302 // We need to store the current allocation region in a local variable | |
| 2303 // here. The problem is that this method doesn't take any locks and | |
| 2304 // there may be other threads which overwrite the current allocation | |
| 2305 // region field. attempt_allocation(), for example, sets it to NULL | |
| 2306 // and this can happen *after* the NULL check here but before the call | |
| 2307 // to free(), resulting in a SIGSEGV. Note that this doesn't appear | |
| 2308 // to be a problem in the optimized build, since the two loads of the | |
| 2309 // current allocation region field are optimized away. | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2310 HeapRegion* hr = _mutator_alloc_region.get(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2311 if (hr == NULL) { |
| 342 | 2312 return 0; |
| 2313 } | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2314 return hr->free(); |
| 342 | 2315 } |
| 2316 | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2317 bool G1CollectedHeap::should_do_concurrent_full_gc(GCCause::Cause cause) { |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2318 return |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2319 ((cause == GCCause::_gc_locker && GCLockerInvokesConcurrent) || |
|
4829
9509c20bba28
6976060: G1: humongous object allocations should initiate marking cycles when necessary
brutisso
parents:
4787
diff
changeset
|
2320 (cause == GCCause::_java_lang_system_gc && ExplicitGCInvokesConcurrent) || |
|
9509c20bba28
6976060: G1: humongous object allocations should initiate marking cycles when necessary
brutisso
parents:
4787
diff
changeset
|
2321 cause == GCCause::_g1_humongous_allocation); |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2322 } |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2323 |
|
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2324 #ifndef PRODUCT |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2325 void G1CollectedHeap::allocate_dummy_regions() { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2326 // Let's fill up most of the region |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2327 size_t word_size = HeapRegion::GrainWords - 1024; |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2328 // 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
|
2329 guarantee(isHumongous(word_size), "sanity"); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2330 |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2331 for (uintx i = 0; i < G1DummyRegionsPerGC; ++i) { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2332 // 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
|
2333 HeapWord* dummy_obj = humongous_obj_allocate(word_size); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2334 if (dummy_obj != NULL) { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2335 MemRegion mr(dummy_obj, word_size); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2336 CollectedHeap::fill_with_object(mr); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2337 } else { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2338 // 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
|
2339 // again. Let's get out of the loop. |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2340 break; |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2341 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2342 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2343 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2344 #endif // !PRODUCT |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2345 |
|
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2346 void G1CollectedHeap::increment_full_collections_completed(bool concurrent) { |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2347 MonitorLockerEx x(FullGCCount_lock, Mutex::_no_safepoint_check_flag); |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2348 |
|
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2349 // 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
|
2350 // 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
|
2351 // 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
|
2352 // assert here. |
|
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2353 |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2354 // We have already incremented _total_full_collections at the start |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2355 // of the GC, so total_full_collections() represents how many full |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2356 // collections have been started. |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2357 unsigned int full_collections_started = total_full_collections(); |
|
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|
2358 |
|
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|
2359 // Given that this method is called at the end of a Full GC or of a |
|
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|
2360 // concurrent cycle, and those can be nested (i.e., a Full GC can |
|
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|
2361 // interrupt a concurrent cycle), the number of full collections |
|
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|
2362 // completed should be either one (in the case where there was no |
|
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|
2363 // nesting) or two (when a Full GC interrupted a concurrent cycle) |
|
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|
2364 // behind the number of full collections started. |
|
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|
2365 |
|
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|
2366 // This is the case for the inner caller, i.e. a Full GC. |
|
2030
fb712ff22571
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|
2367 assert(concurrent || |
|
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|
2368 (full_collections_started == _full_collections_completed + 1) || |
|
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|
2369 (full_collections_started == _full_collections_completed + 2), |
|
2030
fb712ff22571
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|
2370 err_msg("for inner caller (Full GC): full_collections_started = %u " |
|
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|
2371 "is inconsistent with _full_collections_completed = %u", |
|
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|
2372 full_collections_started, _full_collections_completed)); |
|
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|
2373 |
|
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|
2374 // This is the case for the outer caller, i.e. the concurrent cycle. |
|
2030
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|
2375 assert(!concurrent || |
|
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|
2376 (full_collections_started == _full_collections_completed + 1), |
|
2030
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|
2377 err_msg("for outer caller (concurrent cycle): " |
|
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|
2378 "full_collections_started = %u " |
|
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|
2379 "is inconsistent with _full_collections_completed = %u", |
|
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|
2380 full_collections_started, _full_collections_completed)); |
|
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|
2381 |
|
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|
2382 _full_collections_completed += 1; |
|
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|
2383 |
|
1840
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|
2384 // We need to clear the "in_progress" flag in the CM thread before |
|
4e0094bc41fa
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|
2385 // we wake up any waiters (especially when ExplicitInvokesConcurrent |
|
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|
2386 // is set) so that if a waiter requests another System.gc() it doesn't |
|
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|
2387 // incorrectly see that a marking cyle is still in progress. |
|
2030
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|
2388 if (concurrent) { |
|
1840
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|
2389 _cmThread->clear_in_progress(); |
|
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|
2390 } |
|
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|
2391 |
|
1656
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|
2392 // This notify_all() will ensure that a thread that called |
|
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|
2393 // System.gc() with (with ExplicitGCInvokesConcurrent set or not) |
|
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|
2394 // and it's waiting for a full GC to finish will be woken up. It is |
|
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|
2395 // waiting in VM_G1IncCollectionPause::doit_epilogue(). |
|
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|
2396 FullGCCount_lock->notify_all(); |
|
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|
2397 } |
|
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|
2398 |
| 342 | 2399 void G1CollectedHeap::collect_as_vm_thread(GCCause::Cause cause) { |
| 2152 | 2400 assert_at_safepoint(true /* should_be_vm_thread */); |
| 342 | 2401 GCCauseSetter gcs(this, cause); |
| 2402 switch (cause) { | |
| 2403 case GCCause::_heap_inspection: | |
| 2404 case GCCause::_heap_dump: { | |
| 2405 HandleMark hm; | |
| 2406 do_full_collection(false); // don't clear all soft refs | |
| 2407 break; | |
| 2408 } | |
| 2409 default: // XXX FIX ME | |
| 2410 ShouldNotReachHere(); // Unexpected use of this function | |
| 2411 } | |
| 2412 } | |
| 2413 | |
|
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|
2414 void G1CollectedHeap::collect(GCCause::Cause cause) { |
|
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|
2415 // The caller doesn't have the Heap_lock |
|
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|
2416 assert(!Heap_lock->owned_by_self(), "this thread should not own the Heap_lock"); |
|
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|
2417 |
|
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|
2418 unsigned int gc_count_before; |
|
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|
2419 unsigned int full_gc_count_before; |
| 342 | 2420 { |
|
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|
2421 MutexLocker ml(Heap_lock); |
| 1973 | 2422 |
|
1088
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|
2423 // Read the GC count while holding the Heap_lock |
|
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|
2424 gc_count_before = SharedHeap::heap()->total_collections(); |
|
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|
2425 full_gc_count_before = SharedHeap::heap()->total_full_collections(); |
|
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|
2426 } |
|
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|
2427 |
|
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|
2428 if (should_do_concurrent_full_gc(cause)) { |
|
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|
2429 // Schedule an initial-mark evacuation pause that will start a |
| 1973 | 2430 // concurrent cycle. We're setting word_size to 0 which means that |
| 2431 // we are not requesting a post-GC allocation. | |
|
1656
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|
2432 VM_G1IncCollectionPause op(gc_count_before, |
| 1973 | 2433 0, /* word_size */ |
| 2434 true, /* should_initiate_conc_mark */ | |
|
1656
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|
2435 g1_policy()->max_pause_time_ms(), |
|
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|
2436 cause); |
|
4e5661ba9d98
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changeset
|
2437 VMThread::execute(&op); |
|
4e5661ba9d98
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|
2438 } else { |
|
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|
2439 if (cause == GCCause::_gc_locker |
|
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|
2440 DEBUG_ONLY(|| cause == GCCause::_scavenge_alot)) { |
|
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|
2441 |
| 1973 | 2442 // Schedule a standard evacuation pause. We're setting word_size |
| 2443 // to 0 which means that we are not requesting a post-GC allocation. | |
|
1656
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|
2444 VM_G1IncCollectionPause op(gc_count_before, |
| 1973 | 2445 0, /* word_size */ |
|
1656
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|
2446 false, /* should_initiate_conc_mark */ |
|
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|
2447 g1_policy()->max_pause_time_ms(), |
|
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|
2448 cause); |
|
1088
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|
2449 VMThread::execute(&op); |
|
1656
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|
2450 } else { |
|
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|
2451 // Schedule a Full GC. |
|
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|
2452 VM_G1CollectFull op(gc_count_before, full_gc_count_before, cause); |
|
1088
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6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
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|
2453 VMThread::execute(&op); |
|
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diff
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|
2454 } |
| 342 | 2455 } |
| 2456 } | |
| 2457 | |
| 2458 bool G1CollectedHeap::is_in(const void* p) const { | |
| 4708 | 2459 if (_g1_committed.contains(p)) { |
| 2460 // Given that we know that p is in the committed space, | |
| 2461 // heap_region_containing_raw() should successfully | |
| 2462 // return the containing region. | |
| 2463 HeapRegion* hr = heap_region_containing_raw(p); | |
| 342 | 2464 return hr->is_in(p); |
| 2465 } else { | |
| 2466 return _perm_gen->as_gen()->is_in(p); | |
| 2467 } | |
| 2468 } | |
| 2469 | |
| 2470 // Iteration functions. | |
| 2471 | |
| 2472 // Iterates an OopClosure over all ref-containing fields of objects | |
| 2473 // within a HeapRegion. | |
| 2474 | |
| 2475 class IterateOopClosureRegionClosure: public HeapRegionClosure { | |
| 2476 MemRegion _mr; | |
| 2477 OopClosure* _cl; | |
| 2478 public: | |
| 2479 IterateOopClosureRegionClosure(MemRegion mr, OopClosure* cl) | |
| 2480 : _mr(mr), _cl(cl) {} | |
| 2481 bool doHeapRegion(HeapRegion* r) { | |
| 2482 if (! r->continuesHumongous()) { | |
| 2483 r->oop_iterate(_cl); | |
| 2484 } | |
| 2485 return false; | |
| 2486 } | |
| 2487 }; | |
| 2488 | |
| 678 | 2489 void G1CollectedHeap::oop_iterate(OopClosure* cl, bool do_perm) { |
| 342 | 2490 IterateOopClosureRegionClosure blk(_g1_committed, cl); |
| 3766 | 2491 heap_region_iterate(&blk); |
| 678 | 2492 if (do_perm) { |
| 2493 perm_gen()->oop_iterate(cl); | |
| 2494 } | |
| 342 | 2495 } |
| 2496 | |
| 678 | 2497 void G1CollectedHeap::oop_iterate(MemRegion mr, OopClosure* cl, bool do_perm) { |
| 342 | 2498 IterateOopClosureRegionClosure blk(mr, cl); |
| 3766 | 2499 heap_region_iterate(&blk); |
| 678 | 2500 if (do_perm) { |
| 2501 perm_gen()->oop_iterate(cl); | |
| 2502 } | |
| 342 | 2503 } |
| 2504 | |
| 2505 // Iterates an ObjectClosure over all objects within a HeapRegion. | |
| 2506 | |
| 2507 class IterateObjectClosureRegionClosure: public HeapRegionClosure { | |
| 2508 ObjectClosure* _cl; | |
| 2509 public: | |
| 2510 IterateObjectClosureRegionClosure(ObjectClosure* cl) : _cl(cl) {} | |
| 2511 bool doHeapRegion(HeapRegion* r) { | |
| 2512 if (! r->continuesHumongous()) { | |
| 2513 r->object_iterate(_cl); | |
| 2514 } | |
| 2515 return false; | |
| 2516 } | |
| 2517 }; | |
| 2518 | |
| 678 | 2519 void G1CollectedHeap::object_iterate(ObjectClosure* cl, bool do_perm) { |
| 342 | 2520 IterateObjectClosureRegionClosure blk(cl); |
| 3766 | 2521 heap_region_iterate(&blk); |
| 678 | 2522 if (do_perm) { |
| 2523 perm_gen()->object_iterate(cl); | |
| 2524 } | |
| 342 | 2525 } |
| 2526 | |
| 2527 void G1CollectedHeap::object_iterate_since_last_GC(ObjectClosure* cl) { | |
| 2528 // FIXME: is this right? | |
| 2529 guarantee(false, "object_iterate_since_last_GC not supported by G1 heap"); | |
| 2530 } | |
| 2531 | |
| 2532 // Calls a SpaceClosure on a HeapRegion. | |
| 2533 | |
| 2534 class SpaceClosureRegionClosure: public HeapRegionClosure { | |
| 2535 SpaceClosure* _cl; | |
| 2536 public: | |
| 2537 SpaceClosureRegionClosure(SpaceClosure* cl) : _cl(cl) {} | |
| 2538 bool doHeapRegion(HeapRegion* r) { | |
| 2539 _cl->do_space(r); | |
| 2540 return false; | |
| 2541 } | |
| 2542 }; | |
| 2543 | |
| 2544 void G1CollectedHeap::space_iterate(SpaceClosure* cl) { | |
| 2545 SpaceClosureRegionClosure blk(cl); | |
| 3766 | 2546 heap_region_iterate(&blk); |
| 342 | 2547 } |
| 2548 | |
| 3766 | 2549 void G1CollectedHeap::heap_region_iterate(HeapRegionClosure* cl) const { |
| 2550 _hrs.iterate(cl); | |
| 342 | 2551 } |
| 2552 | |
| 2553 void G1CollectedHeap::heap_region_iterate_from(HeapRegion* r, | |
| 3766 | 2554 HeapRegionClosure* cl) const { |
| 2555 _hrs.iterate_from(r, cl); | |
| 342 | 2556 } |
| 2557 | |
| 2558 void | |
| 2559 G1CollectedHeap::heap_region_par_iterate_chunked(HeapRegionClosure* cl, | |
|
4728
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diff
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|
2560 uint worker, |
|
441e946dc1af
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4711
diff
changeset
|
2561 uint no_of_par_workers, |
| 342 | 2562 jint claim_value) { |
| 355 | 2563 const size_t regions = n_regions(); |
|
4728
441e946dc1af
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4711
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|
2564 const uint max_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
|
4095
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6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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|
2565 no_of_par_workers : |
|
bca17e38de00
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4090
diff
changeset
|
2566 1); |
|
bca17e38de00
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4090
diff
changeset
|
2567 assert(UseDynamicNumberOfGCThreads || |
|
bca17e38de00
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4090
diff
changeset
|
2568 no_of_par_workers == workers()->total_workers(), |
|
bca17e38de00
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diff
changeset
|
2569 "Non dynamic should use fixed number of workers"); |
| 355 | 2570 // try to spread out the starting points of the workers |
|
4095
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4090
diff
changeset
|
2571 const size_t start_index = regions / max_workers * (size_t) worker; |
| 355 | 2572 |
| 2573 // each worker will actually look at all regions | |
| 2574 for (size_t count = 0; count < regions; ++count) { | |
| 2575 const size_t index = (start_index + count) % regions; | |
| 2576 assert(0 <= index && index < regions, "sanity"); | |
| 2577 HeapRegion* r = region_at(index); | |
| 2578 // we'll ignore "continues humongous" regions (we'll process them | |
| 2579 // when we come across their corresponding "start humongous" | |
| 2580 // region) and regions already claimed | |
| 2581 if (r->claim_value() == claim_value || r->continuesHumongous()) { | |
| 2582 continue; | |
| 2583 } | |
| 2584 // OK, try to claim it | |
| 342 | 2585 if (r->claimHeapRegion(claim_value)) { |
| 355 | 2586 // success! |
| 2587 assert(!r->continuesHumongous(), "sanity"); | |
| 2588 if (r->startsHumongous()) { | |
| 2589 // If the region is "starts humongous" we'll iterate over its | |
| 2590 // "continues humongous" first; in fact we'll do them | |
| 2591 // first. The order is important. In on case, calling the | |
| 2592 // closure on the "starts humongous" region might de-allocate | |
| 2593 // and clear all its "continues humongous" regions and, as a | |
| 2594 // result, we might end up processing them twice. So, we'll do | |
| 2595 // them first (notice: most closures will ignore them anyway) and | |
| 2596 // then we'll do the "starts humongous" region. | |
| 2597 for (size_t ch_index = index + 1; ch_index < regions; ++ch_index) { | |
| 2598 HeapRegion* chr = region_at(ch_index); | |
| 2599 | |
| 2600 // if the region has already been claimed or it's not | |
| 2601 // "continues humongous" we're done | |
| 2602 if (chr->claim_value() == claim_value || | |
| 2603 !chr->continuesHumongous()) { | |
| 2604 break; | |
| 2605 } | |
| 2606 | |
| 2607 // Noone should have claimed it directly. We can given | |
| 2608 // that we claimed its "starts humongous" region. | |
| 2609 assert(chr->claim_value() != claim_value, "sanity"); | |
| 2610 assert(chr->humongous_start_region() == r, "sanity"); | |
| 2611 | |
| 2612 if (chr->claimHeapRegion(claim_value)) { | |
| 2613 // we should always be able to claim it; noone else should | |
| 2614 // be trying to claim this region | |
| 2615 | |
| 2616 bool res2 = cl->doHeapRegion(chr); | |
| 2617 assert(!res2, "Should not abort"); | |
| 2618 | |
| 2619 // Right now, this holds (i.e., no closure that actually | |
| 2620 // does something with "continues humongous" regions | |
| 2621 // clears them). We might have to weaken it in the future, | |
| 2622 // but let's leave these two asserts here for extra safety. | |
| 2623 assert(chr->continuesHumongous(), "should still be the case"); | |
| 2624 assert(chr->humongous_start_region() == r, "sanity"); | |
| 2625 } else { | |
| 2626 guarantee(false, "we should not reach here"); | |
| 2627 } | |
| 2628 } | |
| 2629 } | |
| 2630 | |
| 2631 assert(!r->continuesHumongous(), "sanity"); | |
| 2632 bool res = cl->doHeapRegion(r); | |
| 2633 assert(!res, "Should not abort"); | |
| 2634 } | |
| 2635 } | |
| 2636 } | |
| 2637 | |
| 390 | 2638 class ResetClaimValuesClosure: public HeapRegionClosure { |
| 2639 public: | |
| 2640 bool doHeapRegion(HeapRegion* r) { | |
| 2641 r->set_claim_value(HeapRegion::InitialClaimValue); | |
| 2642 return false; | |
| 2643 } | |
| 2644 }; | |
| 2645 | |
|
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2646 void G1CollectedHeap::reset_heap_region_claim_values() { |
| 390 | 2647 ResetClaimValuesClosure blk; |
| 2648 heap_region_iterate(&blk); | |
| 2649 } | |
| 2650 | |
|
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2651 void G1CollectedHeap::reset_cset_heap_region_claim_values() { |
|
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2652 ResetClaimValuesClosure blk; |
|
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2653 collection_set_iterate(&blk); |
|
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|
2654 } |
|
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|
2655 |
| 355 | 2656 #ifdef ASSERT |
| 2657 // This checks whether all regions in the heap have the correct claim | |
| 2658 // value. I also piggy-backed on this a check to ensure that the | |
| 2659 // humongous_start_region() information on "continues humongous" | |
| 2660 // regions is correct. | |
| 2661 | |
| 2662 class CheckClaimValuesClosure : public HeapRegionClosure { | |
| 2663 private: | |
| 2664 jint _claim_value; | |
| 2665 size_t _failures; | |
| 2666 HeapRegion* _sh_region; | |
| 2667 public: | |
| 2668 CheckClaimValuesClosure(jint claim_value) : | |
| 2669 _claim_value(claim_value), _failures(0), _sh_region(NULL) { } | |
| 2670 bool doHeapRegion(HeapRegion* r) { | |
| 2671 if (r->claim_value() != _claim_value) { | |
|
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|
2672 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
| 355 | 2673 "claim value = %d, should be %d", |
|
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|
2674 HR_FORMAT_PARAMS(r), |
|
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|
2675 r->claim_value(), _claim_value); |
| 355 | 2676 ++_failures; |
| 2677 } | |
| 2678 if (!r->isHumongous()) { | |
| 2679 _sh_region = NULL; | |
| 2680 } else if (r->startsHumongous()) { | |
| 2681 _sh_region = r; | |
| 2682 } else if (r->continuesHumongous()) { | |
| 2683 if (r->humongous_start_region() != _sh_region) { | |
|
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|
2684 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
| 355 | 2685 "HS = "PTR_FORMAT", should be "PTR_FORMAT, |
|
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|
2686 HR_FORMAT_PARAMS(r), |
| 355 | 2687 r->humongous_start_region(), |
| 2688 _sh_region); | |
| 2689 ++_failures; | |
| 342 | 2690 } |
| 2691 } | |
| 355 | 2692 return false; |
| 2693 } | |
| 2694 size_t failures() { | |
| 2695 return _failures; | |
| 2696 } | |
| 2697 }; | |
| 2698 | |
| 2699 bool G1CollectedHeap::check_heap_region_claim_values(jint claim_value) { | |
| 2700 CheckClaimValuesClosure cl(claim_value); | |
| 2701 heap_region_iterate(&cl); | |
| 2702 return cl.failures() == 0; | |
| 2703 } | |
|
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|
2704 |
|
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|
2705 class CheckClaimValuesInCSetHRClosure: public HeapRegionClosure { |
|
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|
2706 jint _claim_value; |
|
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|
2707 size_t _failures; |
|
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|
2708 |
|
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|
2709 public: |
|
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|
2710 CheckClaimValuesInCSetHRClosure(jint claim_value) : |
|
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|
2711 _claim_value(claim_value), |
|
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|
2712 _failures(0) { } |
|
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|
2713 |
|
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|
2714 size_t failures() { |
|
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|
2715 return _failures; |
|
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|
2716 } |
|
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|
2717 |
|
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|
2718 bool doHeapRegion(HeapRegion* hr) { |
|
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|
2719 assert(hr->in_collection_set(), "how?"); |
|
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|
2720 assert(!hr->isHumongous(), "H-region in CSet"); |
|
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|
2721 if (hr->claim_value() != _claim_value) { |
|
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|
2722 gclog_or_tty->print_cr("CSet Region " HR_FORMAT ", " |
|
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|
2723 "claim value = %d, should be %d", |
|
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|
2724 HR_FORMAT_PARAMS(hr), |
|
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|
2725 hr->claim_value(), _claim_value); |
|
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|
2726 _failures += 1; |
|
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|
2727 } |
|
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|
2728 return false; |
|
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|
2729 } |
|
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|
2730 }; |
|
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|
2731 |
|
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|
2732 bool G1CollectedHeap::check_cset_heap_region_claim_values(jint claim_value) { |
|
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|
2733 CheckClaimValuesInCSetHRClosure cl(claim_value); |
|
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|
2734 collection_set_iterate(&cl); |
|
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|
2735 return cl.failures() == 0; |
|
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|
2736 } |
| 355 | 2737 #endif // ASSERT |
| 342 | 2738 |
|
4709
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7119908: G1: Cache CSet start region for each worker for subsequent reuse
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|
2739 // Clear the cached CSet starting regions and (more importantly) |
|
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|
2740 // the time stamps. Called when we reset the GC time stamp. |
|
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|
2741 void G1CollectedHeap::clear_cset_start_regions() { |
|
fd2b426c30db
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|
2742 assert(_worker_cset_start_region != NULL, "sanity"); |
|
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|
2743 assert(_worker_cset_start_region_time_stamp != NULL, "sanity"); |
|
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|
2744 |
|
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|
2745 int n_queues = MAX2((int)ParallelGCThreads, 1); |
|
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|
2746 for (int i = 0; i < n_queues; i++) { |
|
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|
2747 _worker_cset_start_region[i] = NULL; |
|
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|
2748 _worker_cset_start_region_time_stamp[i] = 0; |
|
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|
2749 } |
|
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|
2750 } |
|
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|
2751 |
|
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changeset
|
2752 // Given the id of a worker, obtain or calculate a suitable |
|
fd2b426c30db
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|
2753 // starting region for iterating over the current collection set. |
|
4097
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|
2754 HeapRegion* G1CollectedHeap::start_cset_region_for_worker(int worker_i) { |
|
4709
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|
2755 assert(get_gc_time_stamp() > 0, "should have been updated by now"); |
|
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|
2756 |
|
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|
2757 HeapRegion* result = NULL; |
|
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|
2758 unsigned gc_time_stamp = get_gc_time_stamp(); |
|
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|
2759 |
|
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|
2760 if (_worker_cset_start_region_time_stamp[worker_i] == gc_time_stamp) { |
|
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|
2761 // Cached starting region for current worker was set |
|
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|
2762 // during the current pause - so it's valid. |
|
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|
2763 // Note: the cached starting heap region may be NULL |
|
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|
2764 // (when the collection set is empty). |
|
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|
2765 result = _worker_cset_start_region[worker_i]; |
|
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|
2766 assert(result == NULL || result->in_collection_set(), "sanity"); |
|
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|
2767 return result; |
|
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|
2768 } |
|
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|
2769 |
|
fd2b426c30db
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changeset
|
2770 // The cached entry was not valid so let's calculate |
|
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|
2771 // a suitable starting heap region for this worker. |
|
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|
2772 |
|
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|
2773 // We want the parallel threads to start their collection |
|
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|
2774 // set iteration at different collection set regions to |
|
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diff
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|
2775 // avoid contention. |
|
fd2b426c30db
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diff
changeset
|
2776 // If we have: |
|
fd2b426c30db
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diff
changeset
|
2777 // n collection set regions |
|
fd2b426c30db
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changeset
|
2778 // p threads |
|
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changeset
|
2779 // Then thread t will start at region floor ((t * n) / p) |
|
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|
2780 |
|
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|
2781 result = g1_policy()->collection_set(); |
|
4097
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|
2782 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
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|
2783 size_t cs_size = g1_policy()->cset_region_length(); |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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4711
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|
2784 uint active_workers = workers()->active_workers(); |
|
4709
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|
2785 assert(UseDynamicNumberOfGCThreads || |
|
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|
2786 active_workers == workers()->total_workers(), |
|
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7119908: G1: Cache CSet start region for each worker for subsequent reuse
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changeset
|
2787 "Unless dynamic should use total workers"); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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diff
changeset
|
2788 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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changeset
|
2789 size_t end_ind = (cs_size * worker_i) / active_workers; |
|
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7119908: G1: Cache CSet start region for each worker for subsequent reuse
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changeset
|
2790 size_t start_ind = 0; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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parents:
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changeset
|
2791 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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changeset
|
2792 if (worker_i > 0 && |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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diff
changeset
|
2793 _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
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parents:
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diff
changeset
|
2794 // Previous workers starting region is valid |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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changeset
|
2795 // so let's iterate from there |
|
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7119908: G1: Cache CSet start region for each worker for subsequent reuse
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changeset
|
2796 start_ind = (cs_size * (worker_i - 1)) / active_workers; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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changeset
|
2797 result = _worker_cset_start_region[worker_i - 1]; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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parents:
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changeset
|
2798 } |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
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diff
changeset
|
2799 |
|
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7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
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diff
changeset
|
2800 for (size_t i = start_ind; i < end_ind; i++) { |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
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diff
changeset
|
2801 result = result->next_in_collection_set(); |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2802 } |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2803 } |
|
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2804 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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diff
changeset
|
2805 // Note: the calculated starting heap region may be NULL |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
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changeset
|
2806 // (when the collection set is empty). |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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diff
changeset
|
2807 assert(result == NULL || result->in_collection_set(), "sanity"); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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parents:
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changeset
|
2808 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
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diff
changeset
|
2809 "should be updated only once per pause"); |
|
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7119908: G1: Cache CSet start region for each worker for subsequent reuse
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parents:
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diff
changeset
|
2810 _worker_cset_start_region[worker_i] = result; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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parents:
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changeset
|
2811 OrderAccess::storestore(); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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parents:
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changeset
|
2812 _worker_cset_start_region_time_stamp[worker_i] = gc_time_stamp; |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
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parents:
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diff
changeset
|
2813 return result; |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2814 } |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
2815 |
| 342 | 2816 void G1CollectedHeap::collection_set_iterate(HeapRegionClosure* cl) { |
| 2817 HeapRegion* r = g1_policy()->collection_set(); | |
| 2818 while (r != NULL) { | |
| 2819 HeapRegion* next = r->next_in_collection_set(); | |
| 2820 if (cl->doHeapRegion(r)) { | |
| 2821 cl->incomplete(); | |
| 2822 return; | |
| 2823 } | |
| 2824 r = next; | |
| 2825 } | |
| 2826 } | |
| 2827 | |
| 2828 void G1CollectedHeap::collection_set_iterate_from(HeapRegion* r, | |
| 2829 HeapRegionClosure *cl) { | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2830 if (r == NULL) { |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2831 // 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
|
2832 return; |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2833 } |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
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diff
changeset
|
2834 |
| 342 | 2835 assert(r->in_collection_set(), |
| 2836 "Start region must be a member of the collection set."); | |
| 2837 HeapRegion* cur = r; | |
| 2838 while (cur != NULL) { | |
| 2839 HeapRegion* next = cur->next_in_collection_set(); | |
| 2840 if (cl->doHeapRegion(cur) && false) { | |
| 2841 cl->incomplete(); | |
| 2842 return; | |
| 2843 } | |
| 2844 cur = next; | |
| 2845 } | |
| 2846 cur = g1_policy()->collection_set(); | |
| 2847 while (cur != r) { | |
| 2848 HeapRegion* next = cur->next_in_collection_set(); | |
| 2849 if (cl->doHeapRegion(cur) && false) { | |
| 2850 cl->incomplete(); | |
| 2851 return; | |
| 2852 } | |
| 2853 cur = next; | |
| 2854 } | |
| 2855 } | |
| 2856 | |
| 2857 CompactibleSpace* G1CollectedHeap::first_compactible_space() { | |
| 3766 | 2858 return n_regions() > 0 ? region_at(0) : NULL; |
| 342 | 2859 } |
| 2860 | |
| 2861 | |
| 2862 Space* G1CollectedHeap::space_containing(const void* addr) const { | |
| 2863 Space* res = heap_region_containing(addr); | |
| 2864 if (res == NULL) | |
| 2865 res = perm_gen()->space_containing(addr); | |
| 2866 return res; | |
| 2867 } | |
| 2868 | |
| 2869 HeapWord* G1CollectedHeap::block_start(const void* addr) const { | |
| 2870 Space* sp = space_containing(addr); | |
| 2871 if (sp != NULL) { | |
| 2872 return sp->block_start(addr); | |
| 2873 } | |
| 2874 return NULL; | |
| 2875 } | |
| 2876 | |
| 2877 size_t G1CollectedHeap::block_size(const HeapWord* addr) const { | |
| 2878 Space* sp = space_containing(addr); | |
| 2879 assert(sp != NULL, "block_size of address outside of heap"); | |
| 2880 return sp->block_size(addr); | |
| 2881 } | |
| 2882 | |
| 2883 bool G1CollectedHeap::block_is_obj(const HeapWord* addr) const { | |
| 2884 Space* sp = space_containing(addr); | |
| 2885 return sp->block_is_obj(addr); | |
| 2886 } | |
| 2887 | |
| 2888 bool G1CollectedHeap::supports_tlab_allocation() const { | |
| 2889 return true; | |
| 2890 } | |
| 2891 | |
| 2892 size_t G1CollectedHeap::tlab_capacity(Thread* ignored) const { | |
| 2893 return HeapRegion::GrainBytes; | |
| 2894 } | |
| 2895 | |
| 2896 size_t G1CollectedHeap::unsafe_max_tlab_alloc(Thread* ignored) const { | |
| 2897 // Return the remaining space in the cur alloc region, but not less than | |
| 2898 // the min TLAB size. | |
|
1313
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6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
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|
2899 |
|
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2900 // 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
|
2901 // since we can't allow tlabs to grow big enough to accomodate |
|
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
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diff
changeset
|
2902 // humongous objects. |
|
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2903 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2904 HeapRegion* hr = _mutator_alloc_region.get(); |
|
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2905 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
|
2906 if (hr == NULL) { |
|
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2907 return max_tlab_size; |
| 342 | 2908 } else { |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2909 return MIN2(MAX2(hr->free(), (size_t) MinTLABSize), max_tlab_size); |
| 342 | 2910 } |
| 2911 } | |
| 2912 | |
| 2913 size_t G1CollectedHeap::max_capacity() const { | |
|
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2914 return _g1_reserved.byte_size(); |
| 342 | 2915 } |
| 2916 | |
| 2917 jlong G1CollectedHeap::millis_since_last_gc() { | |
| 2918 // assert(false, "NYI"); | |
| 2919 return 0; | |
| 2920 } | |
| 2921 | |
| 2922 void G1CollectedHeap::prepare_for_verify() { | |
| 2923 if (SafepointSynchronize::is_at_safepoint() || ! UseTLAB) { | |
| 2924 ensure_parsability(false); | |
| 2925 } | |
| 2926 g1_rem_set()->prepare_for_verify(); | |
| 2927 } | |
| 2928 | |
| 2929 class VerifyLivenessOopClosure: public OopClosure { | |
|
3772
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7004681: G1: Extend marking verification to Full GCs
johnc
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3766
diff
changeset
|
2930 G1CollectedHeap* _g1h; |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
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diff
changeset
|
2931 VerifyOption _vo; |
| 342 | 2932 public: |
|
3772
6747fd0512e0
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johnc
parents:
3766
diff
changeset
|
2933 VerifyLivenessOopClosure(G1CollectedHeap* g1h, VerifyOption vo): |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
2934 _g1h(g1h), _vo(vo) |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
2935 { } |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2936 void do_oop(narrowOop *p) { do_oop_work(p); } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2937 void do_oop( oop *p) { do_oop_work(p); } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2938 |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2939 template <class T> void do_oop_work(T *p) { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2940 oop obj = oopDesc::load_decode_heap_oop(p); |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
2941 guarantee(obj == NULL || !_g1h->is_obj_dead_cond(obj, _vo), |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
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838
diff
changeset
|
2942 "Dead object referenced by a not dead object"); |
| 342 | 2943 } |
| 2944 }; | |
| 2945 | |
| 2946 class VerifyObjsInRegionClosure: public ObjectClosure { | |
| 811 | 2947 private: |
| 342 | 2948 G1CollectedHeap* _g1h; |
| 2949 size_t _live_bytes; | |
| 2950 HeapRegion *_hr; | |
|
3772
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7004681: G1: Extend marking verification to Full GCs
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parents:
3766
diff
changeset
|
2951 VerifyOption _vo; |
| 342 | 2952 public: |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
2953 // _vo == UsePrevMarking -> use "prev" marking information, |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
2954 // _vo == UseNextMarking -> use "next" marking information, |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
2955 // _vo == UseMarkWord -> use mark word from object header. |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
2956 VerifyObjsInRegionClosure(HeapRegion *hr, VerifyOption vo) |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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parents:
3766
diff
changeset
|
2957 : _live_bytes(0), _hr(hr), _vo(vo) { |
| 342 | 2958 _g1h = G1CollectedHeap::heap(); |
| 2959 } | |
| 2960 void do_object(oop o) { | |
|
3772
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parents:
3766
diff
changeset
|
2961 VerifyLivenessOopClosure isLive(_g1h, _vo); |
| 342 | 2962 assert(o != NULL, "Huh?"); |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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parents:
3766
diff
changeset
|
2963 if (!_g1h->is_obj_dead_cond(o, _vo)) { |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
2964 // If the object is alive according to the mark word, |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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parents:
3766
diff
changeset
|
2965 // then verify that the marking information agrees. |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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parents:
3766
diff
changeset
|
2966 // Note we can't verify the contra-positive of the |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
2967 // above: if the object is dead (according to the mark |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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parents:
3766
diff
changeset
|
2968 // word), it may not be marked, or may have been marked |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
2969 // but has since became dead, or may have been allocated |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
2970 // since the last marking. |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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parents:
3766
diff
changeset
|
2971 if (_vo == VerifyOption_G1UseMarkWord) { |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
2972 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
|
2973 } |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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parents:
3766
diff
changeset
|
2974 |
| 342 | 2975 o->oop_iterate(&isLive); |
|
1389
5dbd9300cf9c
6943926: G1: Integer overflow during heap region verification
johnc
parents:
1388
diff
changeset
|
2976 if (!_hr->obj_allocated_since_prev_marking(o)) { |
|
5dbd9300cf9c
6943926: G1: Integer overflow during heap region verification
johnc
parents:
1388
diff
changeset
|
2977 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
|
2978 _live_bytes += (obj_size * HeapWordSize); |
|
5dbd9300cf9c
6943926: G1: Integer overflow during heap region verification
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1388
diff
changeset
|
2979 } |
| 342 | 2980 } |
| 2981 } | |
| 2982 size_t live_bytes() { return _live_bytes; } | |
| 2983 }; | |
| 2984 | |
| 2985 class PrintObjsInRegionClosure : public ObjectClosure { | |
| 2986 HeapRegion *_hr; | |
| 2987 G1CollectedHeap *_g1; | |
| 2988 public: | |
| 2989 PrintObjsInRegionClosure(HeapRegion *hr) : _hr(hr) { | |
| 2990 _g1 = G1CollectedHeap::heap(); | |
| 2991 }; | |
| 2992 | |
| 2993 void do_object(oop o) { | |
| 2994 if (o != NULL) { | |
| 2995 HeapWord *start = (HeapWord *) o; | |
| 2996 size_t word_sz = o->size(); | |
| 2997 gclog_or_tty->print("\nPrinting obj "PTR_FORMAT" of size " SIZE_FORMAT | |
| 2998 " isMarkedPrev %d isMarkedNext %d isAllocSince %d\n", | |
| 2999 (void*) o, word_sz, | |
| 3000 _g1->isMarkedPrev(o), | |
| 3001 _g1->isMarkedNext(o), | |
| 3002 _hr->obj_allocated_since_prev_marking(o)); | |
| 3003 HeapWord *end = start + word_sz; | |
| 3004 HeapWord *cur; | |
| 3005 int *val; | |
| 3006 for (cur = start; cur < end; cur++) { | |
| 3007 val = (int *) cur; | |
| 3008 gclog_or_tty->print("\t "PTR_FORMAT":"PTR_FORMAT"\n", val, *val); | |
| 3009 } | |
| 3010 } | |
| 3011 } | |
| 3012 }; | |
| 3013 | |
| 3014 class VerifyRegionClosure: public HeapRegionClosure { | |
| 811 | 3015 private: |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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parents:
3766
diff
changeset
|
3016 bool _allow_dirty; |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3017 bool _par; |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3018 VerifyOption _vo; |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3019 bool _failures; |
| 811 | 3020 public: |
|
3772
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7004681: G1: Extend marking verification to Full GCs
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|
3021 // _vo == UsePrevMarking -> use "prev" marking information, |
|
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3022 // _vo == UseNextMarking -> use "next" marking information, |
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3023 // _vo == UseMarkWord -> use mark word from object header. |
|
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|
3024 VerifyRegionClosure(bool allow_dirty, bool par, VerifyOption vo) |
|
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3025 : _allow_dirty(allow_dirty), |
|
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|
3026 _par(par), |
|
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|
3027 _vo(vo), |
|
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|
3028 _failures(false) {} |
|
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|
3029 |
|
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|
3030 bool failures() { |
|
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|
3031 return _failures; |
|
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|
3032 } |
|
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|
3033 |
| 342 | 3034 bool doHeapRegion(HeapRegion* r) { |
| 390 | 3035 guarantee(_par || r->claim_value() == HeapRegion::InitialClaimValue, |
| 3036 "Should be unclaimed at verify points."); | |
|
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|
3037 if (!r->continuesHumongous()) { |
|
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|
3038 bool failures = false; |
|
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|
3039 r->verify(_allow_dirty, _vo, &failures); |
|
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|
3040 if (failures) { |
|
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|
3041 _failures = true; |
|
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|
3042 } else { |
|
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|
3043 VerifyObjsInRegionClosure not_dead_yet_cl(r, _vo); |
|
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|
3044 r->object_iterate(¬_dead_yet_cl); |
|
4787
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|
3045 if (_vo != VerifyOption_G1UseNextMarking) { |
|
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|
3046 if (r->max_live_bytes() < not_dead_yet_cl.live_bytes()) { |
|
2ace1c4ee8da
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|
3047 gclog_or_tty->print_cr("["PTR_FORMAT","PTR_FORMAT"] " |
|
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|
3048 "max_live_bytes "SIZE_FORMAT" " |
|
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|
3049 "< calculated "SIZE_FORMAT, |
|
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|
3050 r->bottom(), r->end(), |
|
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|
3051 r->max_live_bytes(), |
|
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|
3052 not_dead_yet_cl.live_bytes()); |
|
4787
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|
3053 _failures = true; |
|
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|
3054 } |
|
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|
3055 } else { |
|
2ace1c4ee8da
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changeset
|
3056 // When vo == UseNextMarking we cannot currently do a sanity |
|
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|
3057 // check on the live bytes as the calculation has not been |
|
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|
3058 // finalized yet. |
|
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|
3059 } |
|
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|
3060 } |
| 342 | 3061 } |
|
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|
3062 return false; // stop the region iteration if we hit a failure |
| 342 | 3063 } |
| 3064 }; | |
| 3065 | |
| 3066 class VerifyRootsClosure: public OopsInGenClosure { | |
| 3067 private: | |
| 3068 G1CollectedHeap* _g1h; | |
|
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|
3069 VerifyOption _vo; |
| 342 | 3070 bool _failures; |
| 3071 public: | |
|
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|
3072 // _vo == UsePrevMarking -> use "prev" marking information, |
|
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|
3073 // _vo == UseNextMarking -> use "next" marking information, |
|
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|
3074 // _vo == UseMarkWord -> use mark word from object header. |
|
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|
3075 VerifyRootsClosure(VerifyOption vo) : |
|
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|
3076 _g1h(G1CollectedHeap::heap()), |
|
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|
3077 _vo(vo), |
|
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|
3078 _failures(false) { } |
| 342 | 3079 |
| 3080 bool failures() { return _failures; } | |
| 3081 | |
|
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|
3082 template <class T> void do_oop_nv(T* p) { |
|
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|
3083 T heap_oop = oopDesc::load_heap_oop(p); |
|
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|
3084 if (!oopDesc::is_null(heap_oop)) { |
|
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|
3085 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
|
3772
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|
3086 if (_g1h->is_obj_dead_cond(obj, _vo)) { |
| 342 | 3087 gclog_or_tty->print_cr("Root location "PTR_FORMAT" " |
|
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|
3088 "points to dead obj "PTR_FORMAT, p, (void*) obj); |
|
3772
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|
3089 if (_vo == VerifyOption_G1UseMarkWord) { |
|
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changeset
|
3090 gclog_or_tty->print_cr(" Mark word: "PTR_FORMAT, (void*)(obj->mark())); |
|
6747fd0512e0
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changeset
|
3091 } |
| 342 | 3092 obj->print_on(gclog_or_tty); |
| 3093 _failures = true; | |
| 3094 } | |
| 3095 } | |
| 3096 } | |
|
845
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changeset
|
3097 |
|
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changeset
|
3098 void do_oop(oop* p) { do_oop_nv(p); } |
|
df6caf649ff7
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diff
changeset
|
3099 void do_oop(narrowOop* p) { do_oop_nv(p); } |
| 342 | 3100 }; |
| 3101 | |
| 390 | 3102 // This is the task used for parallel heap verification. |
| 3103 | |
| 3104 class G1ParVerifyTask: public AbstractGangTask { | |
| 3105 private: | |
| 3106 G1CollectedHeap* _g1h; | |
|
3772
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|
3107 bool _allow_dirty; |
|
6747fd0512e0
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changeset
|
3108 VerifyOption _vo; |
|
6747fd0512e0
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changeset
|
3109 bool _failures; |
| 390 | 3110 |
| 3111 public: | |
|
3772
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changeset
|
3112 // _vo == UsePrevMarking -> use "prev" marking information, |
|
6747fd0512e0
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changeset
|
3113 // _vo == UseNextMarking -> use "next" marking information, |
|
6747fd0512e0
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changeset
|
3114 // _vo == UseMarkWord -> use mark word from object header. |
|
6747fd0512e0
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changeset
|
3115 G1ParVerifyTask(G1CollectedHeap* g1h, bool allow_dirty, VerifyOption vo) : |
| 390 | 3116 AbstractGangTask("Parallel verify task"), |
|
845
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|
3117 _g1h(g1h), |
|
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6700789: G1: Enable use of compressed oops with G1 heaps
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diff
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|
3118 _allow_dirty(allow_dirty), |
|
3772
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|
3119 _vo(vo), |
|
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|
3120 _failures(false) { } |
|
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|
3121 |
|
ff2402f6a50b
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diff
changeset
|
3122 bool failures() { |
|
ff2402f6a50b
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diff
changeset
|
3123 return _failures; |
|
ff2402f6a50b
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changeset
|
3124 } |
| 390 | 3125 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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4711
diff
changeset
|
3126 void work(uint worker_id) { |
|
637
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6817419: G1: Enable extensive verification for humongous regions
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636
diff
changeset
|
3127 HandleMark hm; |
|
3772
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changeset
|
3128 VerifyRegionClosure blk(_allow_dirty, true, _vo); |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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4711
diff
changeset
|
3129 _g1h->heap_region_par_iterate_chunked(&blk, worker_id, |
|
4095
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|
3130 _g1h->workers()->active_workers(), |
| 390 | 3131 HeapRegion::ParVerifyClaimValue); |
|
1020
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|
3132 if (blk.failures()) { |
|
ff2402f6a50b
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diff
changeset
|
3133 _failures = true; |
|
ff2402f6a50b
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changeset
|
3134 } |
| 390 | 3135 } |
| 3136 }; | |
| 3137 | |
| 342 | 3138 void G1CollectedHeap::verify(bool allow_dirty, bool silent) { |
|
3772
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changeset
|
3139 verify(allow_dirty, silent, VerifyOption_G1UsePrevMarking); |
| 811 | 3140 } |
| 3141 | |
| 3142 void G1CollectedHeap::verify(bool allow_dirty, | |
| 3143 bool silent, | |
|
3772
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changeset
|
3144 VerifyOption vo) { |
| 342 | 3145 if (SafepointSynchronize::is_at_safepoint() || ! UseTLAB) { |
|
3293
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diff
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|
3146 if (!silent) { gclog_or_tty->print("Roots (excluding permgen) "); } |
|
3772
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|
3147 VerifyRootsClosure rootsCl(vo); |
|
4095
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4090
diff
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|
3148 |
|
bca17e38de00
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4090
diff
changeset
|
3149 assert(Thread::current()->is_VM_thread(), |
|
bca17e38de00
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diff
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|
3150 "Expected to be executed serially by the VM thread at this point"); |
|
bca17e38de00
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|
3151 |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
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890
diff
changeset
|
3152 CodeBlobToOopClosure blobsCl(&rootsCl, /*do_marking=*/ false); |
|
3772
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|
3153 |
|
3293
1f4413413144
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diff
changeset
|
3154 // We apply the relevant closures to all the oops in the |
|
1f4413413144
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diff
changeset
|
3155 // system dictionary, the string table and the code cache. |
|
1f4413413144
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diff
changeset
|
3156 const int so = SharedHeap::SO_AllClasses | SharedHeap::SO_Strings | SharedHeap::SO_CodeCache; |
|
3772
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|
3157 |
|
3293
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3289
diff
changeset
|
3158 process_strong_roots(true, // activate StrongRootsScope |
|
1f4413413144
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3289
diff
changeset
|
3159 true, // we set "collecting perm gen" to true, |
|
1f4413413144
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3289
diff
changeset
|
3160 // so we don't reset the dirty cards in the perm gen. |
|
1f4413413144
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3289
diff
changeset
|
3161 SharedHeap::ScanningOption(so), // roots scanning options |
| 342 | 3162 &rootsCl, |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
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diff
changeset
|
3163 &blobsCl, |
| 342 | 3164 &rootsCl); |
|
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changeset
|
3165 |
|
6747fd0512e0
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diff
changeset
|
3166 // If we're verifying after the marking phase of a Full GC then we can't |
|
6747fd0512e0
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changeset
|
3167 // treat the perm gen as roots into the G1 heap. Some of the objects in |
|
6747fd0512e0
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changeset
|
3168 // the perm gen may be dead and hence not marked. If one of these dead |
|
6747fd0512e0
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diff
changeset
|
3169 // objects is considered to be a root then we may end up with a false |
|
6747fd0512e0
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3766
diff
changeset
|
3170 // "Root location <x> points to dead ob <y>" failure. |
|
6747fd0512e0
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3766
diff
changeset
|
3171 if (vo != VerifyOption_G1UseMarkWord) { |
|
6747fd0512e0
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3766
diff
changeset
|
3172 // Since we used "collecting_perm_gen" == true above, we will not have |
|
6747fd0512e0
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3766
diff
changeset
|
3173 // checked the refs from perm into the G1-collected heap. We check those |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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parents:
3766
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changeset
|
3174 // references explicitly below. Whether the relevant cards are dirty |
|
6747fd0512e0
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changeset
|
3175 // is checked further below in the rem set verification. |
|
6747fd0512e0
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diff
changeset
|
3176 if (!silent) { gclog_or_tty->print("Permgen roots "); } |
|
6747fd0512e0
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parents:
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changeset
|
3177 perm_gen()->oop_iterate(&rootsCl); |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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parents:
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|
3178 } |
|
1020
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|
3179 bool failures = rootsCl.failures(); |
|
3772
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|
3180 |
|
6747fd0512e0
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|
3181 if (vo != VerifyOption_G1UseMarkWord) { |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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changeset
|
3182 // If we're verifying during a full GC then the region sets |
|
6747fd0512e0
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changeset
|
3183 // will have been torn down at the start of the GC. Therefore |
|
6747fd0512e0
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changeset
|
3184 // verifying the region sets will fail. So we only verify |
|
6747fd0512e0
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|
3185 // the region sets when not in a full GC. |
|
6747fd0512e0
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changeset
|
3186 if (!silent) { gclog_or_tty->print("HeapRegionSets "); } |
|
6747fd0512e0
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changeset
|
3187 verify_region_sets(); |
|
6747fd0512e0
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|
3188 } |
|
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|
3189 |
| 2152 | 3190 if (!silent) { gclog_or_tty->print("HeapRegions "); } |
| 390 | 3191 if (GCParallelVerificationEnabled && ParallelGCThreads > 1) { |
| 3192 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 3193 "sanity check"); | |
| 3194 | |
|
3772
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|
3195 G1ParVerifyTask task(this, allow_dirty, vo); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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|
3196 assert(UseDynamicNumberOfGCThreads || |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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|
3197 workers()->active_workers() == workers()->total_workers(), |
|
bca17e38de00
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|
3198 "If not dynamic should be using all the workers"); |
|
bca17e38de00
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|
3199 int n_workers = workers()->active_workers(); |
| 390 | 3200 set_par_threads(n_workers); |
| 3201 workers()->run_task(&task); | |
| 3202 set_par_threads(0); | |
|
1020
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|
3203 if (task.failures()) { |
|
ff2402f6a50b
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|
3204 failures = true; |
|
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|
3205 } |
| 390 | 3206 |
|
4095
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|
3207 // Checks that the expected amount of parallel work was done. |
|
bca17e38de00
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|
3208 // The implication is that n_workers is > 0. |
| 390 | 3209 assert(check_heap_region_claim_values(HeapRegion::ParVerifyClaimValue), |
| 3210 "sanity check"); | |
| 3211 | |
| 3212 reset_heap_region_claim_values(); | |
| 3213 | |
| 3214 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 3215 "sanity check"); | |
| 3216 } else { | |
|
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changeset
|
3217 VerifyRegionClosure blk(allow_dirty, false, vo); |
| 3766 | 3218 heap_region_iterate(&blk); |
|
1020
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|
3219 if (blk.failures()) { |
|
ff2402f6a50b
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|
3220 failures = true; |
|
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|
3221 } |
| 390 | 3222 } |
| 2152 | 3223 if (!silent) gclog_or_tty->print("RemSet "); |
| 342 | 3224 rem_set()->verify(); |
|
1020
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|
3225 |
|
ff2402f6a50b
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changeset
|
3226 if (failures) { |
|
ff2402f6a50b
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changeset
|
3227 gclog_or_tty->print_cr("Heap:"); |
|
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
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changeset
|
3228 // 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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diff
changeset
|
3229 // help us track down what went wrong. This is why we call |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
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|
3230 // print_extended_on() instead of print_on(). |
|
53074c2c4600
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changeset
|
3231 print_extended_on(gclog_or_tty); |
|
1020
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changeset
|
3232 gclog_or_tty->print_cr(""); |
|
1547
fb1a39993f69
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jcoomes
parents:
1545
diff
changeset
|
3233 #ifndef PRODUCT |
| 1044 | 3234 if (VerifyDuringGC && G1VerifyDuringGCPrintReachable) { |
| 1388 | 3235 concurrent_mark()->print_reachable("at-verification-failure", |
|
3772
6747fd0512e0
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changeset
|
3236 vo, false /* all */); |
|
1020
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parents:
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diff
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|
3237 } |
|
1547
fb1a39993f69
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
1545
diff
changeset
|
3238 #endif |
|
1020
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diff
changeset
|
3239 gclog_or_tty->flush(); |
|
ff2402f6a50b
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parents:
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diff
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|
3240 } |
|
ff2402f6a50b
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diff
changeset
|
3241 guarantee(!failures, "there should not have been any failures"); |
| 342 | 3242 } else { |
| 3243 if (!silent) gclog_or_tty->print("(SKIPPING roots, heapRegions, remset) "); | |
| 3244 } | |
| 3245 } | |
| 3246 | |
| 3247 class PrintRegionClosure: public HeapRegionClosure { | |
| 3248 outputStream* _st; | |
| 3249 public: | |
| 3250 PrintRegionClosure(outputStream* st) : _st(st) {} | |
| 3251 bool doHeapRegion(HeapRegion* r) { | |
| 3252 r->print_on(_st); | |
| 3253 return false; | |
| 3254 } | |
| 3255 }; | |
| 3256 | |
| 3257 void G1CollectedHeap::print_on(outputStream* st) const { | |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
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diff
changeset
|
3258 st->print(" %-20s", "garbage-first heap"); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
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diff
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|
3259 st->print(" total " SIZE_FORMAT "K, used " SIZE_FORMAT "K", |
|
846
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
3260 capacity()/K, used_unlocked()/K); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
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diff
changeset
|
3261 st->print(" [" INTPTR_FORMAT ", " INTPTR_FORMAT ", " INTPTR_FORMAT ")", |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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diff
changeset
|
3262 _g1_storage.low_boundary(), |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3263 _g1_storage.high(), |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
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811
diff
changeset
|
3264 _g1_storage.high_boundary()); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3265 st->cr(); |
|
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3983
diff
changeset
|
3266 st->print(" region size " SIZE_FORMAT "K, ", HeapRegion::GrainBytes / K); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3267 size_t young_regions = _young_list->length(); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3268 st->print(SIZE_FORMAT " young (" SIZE_FORMAT "K), ", |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3269 young_regions, young_regions * HeapRegion::GrainBytes / K); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
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changeset
|
3270 size_t survivor_regions = g1_policy()->recorded_survivor_regions(); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3271 st->print(SIZE_FORMAT " survivors (" SIZE_FORMAT "K)", |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3272 survivor_regions, survivor_regions * HeapRegion::GrainBytes / K); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3273 st->cr(); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3274 perm()->as_gen()->print_on(st); |
|
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3275 } |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
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parents:
4072
diff
changeset
|
3276 |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
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4072
diff
changeset
|
3277 void G1CollectedHeap::print_extended_on(outputStream* st) const { |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3278 print_on(st); |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3279 |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
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diff
changeset
|
3280 // Print the per-region information. |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
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4072
diff
changeset
|
3281 st->cr(); |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
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4072
diff
changeset
|
3282 st->print_cr("Heap Regions: (Y=young(eden), SU=young(survivor), HS=humongous(starts), HC=humongous(continues), CS=collection set, F=free, TS=gc time stamp, PTAMS=previous top-at-mark-start, NTAMS=next top-at-mark-start)"); |
| 342 | 3283 PrintRegionClosure blk(st); |
| 3766 | 3284 heap_region_iterate(&blk); |
| 342 | 3285 } |
| 3286 | |
| 3287 void G1CollectedHeap::print_gc_threads_on(outputStream* st) const { | |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
3288 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 1019 | 3289 workers()->print_worker_threads_on(st); |
| 3290 } | |
| 3291 _cmThread->print_on(st); | |
| 342 | 3292 st->cr(); |
| 1019 | 3293 _cm->print_worker_threads_on(st); |
| 3294 _cg1r->print_worker_threads_on(st); | |
| 342 | 3295 st->cr(); |
| 3296 } | |
| 3297 | |
| 3298 void G1CollectedHeap::gc_threads_do(ThreadClosure* tc) const { | |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
3299 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 342 | 3300 workers()->threads_do(tc); |
| 3301 } | |
| 3302 tc->do_thread(_cmThread); | |
| 794 | 3303 _cg1r->threads_do(tc); |
| 342 | 3304 } |
| 3305 | |
| 3306 void G1CollectedHeap::print_tracing_info() const { | |
| 3307 // We'll overload this to mean "trace GC pause statistics." | |
| 3308 if (TraceGen0Time || TraceGen1Time) { | |
| 3309 // The "G1CollectorPolicy" is keeping track of these stats, so delegate | |
| 3310 // to that. | |
| 3311 g1_policy()->print_tracing_info(); | |
| 3312 } | |
| 751 | 3313 if (G1SummarizeRSetStats) { |
| 342 | 3314 g1_rem_set()->print_summary_info(); |
| 3315 } | |
| 1282 | 3316 if (G1SummarizeConcMark) { |
| 342 | 3317 concurrent_mark()->print_summary_info(); |
| 3318 } | |
| 3319 g1_policy()->print_yg_surv_rate_info(); | |
| 3320 SpecializationStats::print(); | |
| 3321 } | |
| 3322 | |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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3774
diff
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|
3323 #ifndef PRODUCT |
|
e8b0b0392037
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tonyp
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3774
diff
changeset
|
3324 // Helpful for debugging RSet issues. |
|
e8b0b0392037
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tonyp
parents:
3774
diff
changeset
|
3325 |
|
e8b0b0392037
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3774
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|
3326 class PrintRSetsClosure : public HeapRegionClosure { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3327 private: |
|
e8b0b0392037
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tonyp
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3774
diff
changeset
|
3328 const char* _msg; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3329 size_t _occupied_sum; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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3774
diff
changeset
|
3330 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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3774
diff
changeset
|
3331 public: |
|
e8b0b0392037
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3774
diff
changeset
|
3332 bool doHeapRegion(HeapRegion* r) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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3774
diff
changeset
|
3333 HeapRegionRemSet* hrrs = r->rem_set(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
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3774
diff
changeset
|
3334 size_t occupied = hrrs->occupied(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3335 _occupied_sum += occupied; |
|
e8b0b0392037
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3774
diff
changeset
|
3336 |
|
e8b0b0392037
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3774
diff
changeset
|
3337 gclog_or_tty->print_cr("Printing RSet for region "HR_FORMAT, |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3338 HR_FORMAT_PARAMS(r)); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3339 if (occupied == 0) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3340 gclog_or_tty->print_cr(" RSet is empty"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3341 } else { |
|
e8b0b0392037
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tonyp
parents:
3774
diff
changeset
|
3342 hrrs->print(); |
|
e8b0b0392037
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tonyp
parents:
3774
diff
changeset
|
3343 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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parents:
3774
diff
changeset
|
3344 gclog_or_tty->print_cr("----------"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3345 return false; |
|
e8b0b0392037
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tonyp
parents:
3774
diff
changeset
|
3346 } |
|
e8b0b0392037
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tonyp
parents:
3774
diff
changeset
|
3347 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3348 PrintRSetsClosure(const char* msg) : _msg(msg), _occupied_sum(0) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3349 gclog_or_tty->cr(); |
|
e8b0b0392037
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|
3350 gclog_or_tty->print_cr("========================================"); |
|
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|
3351 gclog_or_tty->print_cr(msg); |
|
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|
3352 gclog_or_tty->cr(); |
|
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|
3353 } |
|
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|
3354 |
|
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|
3355 ~PrintRSetsClosure() { |
|
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|
3356 gclog_or_tty->print_cr("Occupied Sum: "SIZE_FORMAT, _occupied_sum); |
|
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|
3357 gclog_or_tty->print_cr("========================================"); |
|
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|
3358 gclog_or_tty->cr(); |
|
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|
3359 } |
|
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|
3360 }; |
|
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|
3361 |
|
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|
3362 void G1CollectedHeap::print_cset_rsets() { |
|
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3363 PrintRSetsClosure cl("Printing CSet RSets"); |
|
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|
3364 collection_set_iterate(&cl); |
|
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|
3365 } |
|
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|
3366 |
|
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|
3367 void G1CollectedHeap::print_all_rsets() { |
|
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|
3368 PrintRSetsClosure cl("Printing All RSets");; |
|
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|
3369 heap_region_iterate(&cl); |
|
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|
3370 } |
|
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|
3371 #endif // PRODUCT |
|
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|
3372 |
| 342 | 3373 G1CollectedHeap* G1CollectedHeap::heap() { |
| 3374 assert(_sh->kind() == CollectedHeap::G1CollectedHeap, | |
| 3375 "not a garbage-first heap"); | |
| 3376 return _g1h; | |
| 3377 } | |
| 3378 | |
| 3379 void G1CollectedHeap::gc_prologue(bool full /* Ignored */) { | |
|
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3380 // always_do_update_barrier = false; |
| 342 | 3381 assert(InlineCacheBuffer::is_empty(), "should have cleaned up ICBuffer"); |
| 3382 // Call allocation profiler | |
| 3383 AllocationProfiler::iterate_since_last_gc(); | |
| 3384 // Fill TLAB's and such | |
| 3385 ensure_parsability(true); | |
| 3386 } | |
| 3387 | |
| 3388 void G1CollectedHeap::gc_epilogue(bool full /* Ignored */) { | |
| 3389 // FIXME: what is this about? | |
| 3390 // I'm ignoring the "fill_newgen()" call if "alloc_event_enabled" | |
| 3391 // is set. | |
| 3392 COMPILER2_PRESENT(assert(DerivedPointerTable::is_empty(), | |
| 3393 "derived pointer present")); | |
|
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3394 // always_do_update_barrier = true; |
|
3979
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|
3395 |
|
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|
3396 // We have just completed a GC. Update the soft reference |
|
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|
3397 // policy with the new heap occupancy |
|
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|
3398 Universe::update_heap_info_at_gc(); |
| 342 | 3399 } |
| 3400 | |
| 1973 | 3401 HeapWord* G1CollectedHeap::do_collection_pause(size_t word_size, |
| 3402 unsigned int gc_count_before, | |
| 3403 bool* succeeded) { | |
| 3404 assert_heap_not_locked_and_not_at_safepoint(); | |
| 342 | 3405 g1_policy()->record_stop_world_start(); |
| 1973 | 3406 VM_G1IncCollectionPause op(gc_count_before, |
| 3407 word_size, | |
| 3408 false, /* should_initiate_conc_mark */ | |
| 3409 g1_policy()->max_pause_time_ms(), | |
| 3410 GCCause::_g1_inc_collection_pause); | |
| 3411 VMThread::execute(&op); | |
| 3412 | |
| 3413 HeapWord* result = op.result(); | |
| 3414 bool ret_succeeded = op.prologue_succeeded() && op.pause_succeeded(); | |
| 3415 assert(result == NULL || ret_succeeded, | |
| 3416 "the result should be NULL if the VM did not succeed"); | |
| 3417 *succeeded = ret_succeeded; | |
| 3418 | |
| 3419 assert_heap_not_locked(); | |
| 3420 return result; | |
| 342 | 3421 } |
| 3422 | |
| 3423 void | |
| 3424 G1CollectedHeap::doConcurrentMark() { | |
|
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3425 MutexLockerEx x(CGC_lock, Mutex::_no_safepoint_check_flag); |
|
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|
3426 if (!_cmThread->in_progress()) { |
|
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|
3427 _cmThread->set_started(); |
|
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|
3428 CGC_lock->notify(); |
| 342 | 3429 } |
| 3430 } | |
| 3431 | |
| 3432 double G1CollectedHeap::predict_region_elapsed_time_ms(HeapRegion *hr, | |
| 3433 bool young) { | |
| 3434 return _g1_policy->predict_region_elapsed_time_ms(hr, young); | |
| 3435 } | |
| 3436 | |
| 3437 void G1CollectedHeap::check_if_region_is_too_expensive(double | |
| 3438 predicted_time_ms) { | |
| 3439 _g1_policy->check_if_region_is_too_expensive(predicted_time_ms); | |
| 3440 } | |
| 3441 | |
| 3442 size_t G1CollectedHeap::pending_card_num() { | |
| 3443 size_t extra_cards = 0; | |
| 3444 JavaThread *curr = Threads::first(); | |
| 3445 while (curr != NULL) { | |
| 3446 DirtyCardQueue& dcq = curr->dirty_card_queue(); | |
| 3447 extra_cards += dcq.size(); | |
| 3448 curr = curr->next(); | |
| 3449 } | |
| 3450 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
| 3451 size_t buffer_size = dcqs.buffer_size(); | |
| 3452 size_t buffer_num = dcqs.completed_buffers_num(); | |
| 3453 return buffer_size * buffer_num + extra_cards; | |
| 3454 } | |
| 3455 | |
| 3456 size_t G1CollectedHeap::max_pending_card_num() { | |
| 3457 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
| 3458 size_t buffer_size = dcqs.buffer_size(); | |
| 3459 size_t buffer_num = dcqs.completed_buffers_num(); | |
| 3460 int thread_num = Threads::number_of_threads(); | |
| 3461 return (buffer_num + thread_num) * buffer_size; | |
| 3462 } | |
| 3463 | |
| 3464 size_t G1CollectedHeap::cards_scanned() { | |
| 1861 | 3465 return g1_rem_set()->cardsScanned(); |
| 342 | 3466 } |
| 3467 | |
| 3468 void | |
| 3469 G1CollectedHeap::setup_surviving_young_words() { | |
| 3470 guarantee( _surviving_young_words == NULL, "pre-condition" ); | |
|
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|
3471 size_t array_length = g1_policy()->young_cset_region_length(); |
| 342 | 3472 _surviving_young_words = NEW_C_HEAP_ARRAY(size_t, array_length); |
| 3473 if (_surviving_young_words == NULL) { | |
| 3474 vm_exit_out_of_memory(sizeof(size_t) * array_length, | |
| 3475 "Not enough space for young surv words summary."); | |
| 3476 } | |
| 3477 memset(_surviving_young_words, 0, array_length * sizeof(size_t)); | |
|
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|
3478 #ifdef ASSERT |
| 342 | 3479 for (size_t i = 0; i < array_length; ++i) { |
|
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|
3480 assert( _surviving_young_words[i] == 0, "memset above" ); |
|
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|
3481 } |
|
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|
3482 #endif // !ASSERT |
| 342 | 3483 } |
| 3484 | |
| 3485 void | |
| 3486 G1CollectedHeap::update_surviving_young_words(size_t* surv_young_words) { | |
| 3487 MutexLockerEx x(ParGCRareEvent_lock, Mutex::_no_safepoint_check_flag); | |
|
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|
3488 size_t array_length = g1_policy()->young_cset_region_length(); |
| 342 | 3489 for (size_t i = 0; i < array_length; ++i) |
| 3490 _surviving_young_words[i] += surv_young_words[i]; | |
| 3491 } | |
| 3492 | |
| 3493 void | |
| 3494 G1CollectedHeap::cleanup_surviving_young_words() { | |
| 3495 guarantee( _surviving_young_words != NULL, "pre-condition" ); | |
| 3496 FREE_C_HEAP_ARRAY(size_t, _surviving_young_words); | |
| 3497 _surviving_young_words = NULL; | |
| 3498 } | |
| 3499 | |
|
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|
3500 #ifdef ASSERT |
|
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|
3501 class VerifyCSetClosure: public HeapRegionClosure { |
|
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|
3502 public: |
|
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|
3503 bool doHeapRegion(HeapRegion* hr) { |
|
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|
3504 // Here we check that the CSet region's RSet is ready for parallel |
|
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|
3505 // iteration. The fields that we'll verify are only manipulated |
|
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|
3506 // when the region is part of a CSet and is collected. Afterwards, |
|
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|
3507 // we reset these fields when we clear the region's RSet (when the |
|
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|
3508 // region is freed) so they are ready when the region is |
|
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|
3509 // re-allocated. The only exception to this is if there's an |
|
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|
3510 // evacuation failure and instead of freeing the region we leave |
|
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|
3511 // it in the heap. In that case, we reset these fields during |
|
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|
3512 // evacuation failure handling. |
|
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|
3513 guarantee(hr->rem_set()->verify_ready_for_par_iteration(), "verification"); |
|
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|
3514 |
|
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|
3515 // Here's a good place to add any other checks we'd like to |
|
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changeset
|
3516 // perform on CSet regions. |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
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1245
diff
changeset
|
3517 return false; |
|
0414c1049f15
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1245
diff
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|
3518 } |
|
0414c1049f15
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1245
diff
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|
3519 }; |
|
3777
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|
3520 #endif // ASSERT |
|
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|
3521 |
| 1709 | 3522 #if TASKQUEUE_STATS |
| 3523 void G1CollectedHeap::print_taskqueue_stats_hdr(outputStream* const st) { | |
| 3524 st->print_raw_cr("GC Task Stats"); | |
| 3525 st->print_raw("thr "); TaskQueueStats::print_header(1, st); st->cr(); | |
| 3526 st->print_raw("--- "); TaskQueueStats::print_header(2, st); st->cr(); | |
| 3527 } | |
| 3528 | |
| 3529 void G1CollectedHeap::print_taskqueue_stats(outputStream* const st) const { | |
| 3530 print_taskqueue_stats_hdr(st); | |
| 3531 | |
| 3532 TaskQueueStats totals; | |
|
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3533 const int n = workers() != NULL ? workers()->total_workers() : 1; |
| 1709 | 3534 for (int i = 0; i < n; ++i) { |
| 3535 st->print("%3d ", i); task_queue(i)->stats.print(st); st->cr(); | |
| 3536 totals += task_queue(i)->stats; | |
| 3537 } | |
| 3538 st->print_raw("tot "); totals.print(st); st->cr(); | |
| 3539 | |
| 3540 DEBUG_ONLY(totals.verify()); | |
| 3541 } | |
| 3542 | |
| 3543 void G1CollectedHeap::reset_taskqueue_stats() { | |
|
1755
8e5955ddf8e4
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1719
diff
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|
3544 const int n = workers() != NULL ? workers()->total_workers() : 1; |
| 1709 | 3545 for (int i = 0; i < n; ++i) { |
| 3546 task_queue(i)->stats.reset(); | |
| 3547 } | |
| 3548 } | |
| 3549 #endif // TASKQUEUE_STATS | |
| 3550 | |
| 1973 | 3551 bool |
|
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6944166: G1: explicit GCs are not always handled correctly
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changeset
|
3552 G1CollectedHeap::do_collection_pause_at_safepoint(double target_pause_time_ms) { |
| 2152 | 3553 assert_at_safepoint(true /* should_be_vm_thread */); |
| 3554 guarantee(!is_gc_active(), "collection is not reentrant"); | |
| 3555 | |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
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|
3556 if (GC_locker::check_active_before_gc()) { |
| 1973 | 3557 return false; |
|
1359
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6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
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|
3558 } |
|
23b1b27ac76c
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|
3559 |
|
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
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2039
diff
changeset
|
3560 SvcGCMarker sgcm(SvcGCMarker::MINOR); |
|
2039
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
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diff
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|
3561 ResourceMark rm; |
|
7c5250dbd584
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|
3562 |
|
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0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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|
3563 if (PrintHeapAtGC) { |
|
0316eac49d5a
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|
3564 Universe::print_heap_before_gc(); |
|
0316eac49d5a
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|
3565 } |
|
0316eac49d5a
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|
3566 |
| 4072 | 3567 HRSPhaseSetter x(HRSPhaseEvacuation); |
| 2152 | 3568 verify_region_sets_optional(); |
|
2433
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2432
diff
changeset
|
3569 verify_dirty_young_regions(); |
| 2152 | 3570 |
|
4831
7ca7be5a6a0b
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|
3571 // This call will decide whether this pause is an initial-mark |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
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|
3572 // pause. If it is, during_initial_mark_pause() will return true |
|
7ca7be5a6a0b
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|
3573 // for the duration of this pause. |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
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4829
diff
changeset
|
3574 g1_policy()->decide_on_conc_mark_initiation(); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
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4829
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|
3575 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
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4829
diff
changeset
|
3576 // We do not allow initial-mark to be piggy-backed on a mixed GC. |
|
7ca7be5a6a0b
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changeset
|
3577 assert(!g1_policy()->during_initial_mark_pause() || |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3578 g1_policy()->gcs_are_young(), "sanity"); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3579 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3580 // 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
|
3581 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
|
3582 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3583 // 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
|
3584 // 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
|
3585 // 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
|
3586 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
|
3587 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3588 // 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
|
3589 { |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3590 char verbose_str[128]; |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3591 sprintf(verbose_str, "GC pause "); |
| 4710 | 3592 if (g1_policy()->gcs_are_young()) { |
|
3867
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
3593 strcat(verbose_str, "(young)"); |
|
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
3594 } else { |
| 4710 | 3595 strcat(verbose_str, "(mixed)"); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3596 } |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3597 if (g1_policy()->during_initial_mark_pause()) { |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3598 strcat(verbose_str, " (initial-mark)"); |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3599 // 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
|
3600 // full collection counter. |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3601 increment_total_full_collections(); |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3602 } |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3603 |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3604 // if PrintGCDetails is on, we'll print long statistics information |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3605 // 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
|
3606 // is messy if we do. |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3607 gclog_or_tty->date_stamp(PrintGC && PrintGCDateStamps); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3608 TraceCPUTime tcpu(PrintGCDetails, true, gclog_or_tty); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3609 TraceTime t(verbose_str, PrintGC && !PrintGCDetails, true, gclog_or_tty); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3610 |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
3611 TraceCollectorStats tcs(g1mm()->incremental_collection_counters()); |
|
3356
78542e2b5e35
7036199: Adding a notification to the implementation of GarbageCollectorMXBeans
fparain
parents:
3323
diff
changeset
|
3612 TraceMemoryManagerStats tms(false /* fullGC */, gc_cause()); |
|
1089
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
tonyp
parents:
1088
diff
changeset
|
3613 |
| 2361 | 3614 // If the secondary_free_list is not empty, append it to the |
| 3615 // free_list. No need to wait for the cleanup operation to finish; | |
| 3616 // the region allocation code will check the secondary_free_list | |
| 3617 // and wait if necessary. If the G1StressConcRegionFreeing flag is | |
| 3618 // set, skip this step so that the region allocation code has to | |
| 3619 // get entries from the secondary_free_list. | |
| 2152 | 3620 if (!G1StressConcRegionFreeing) { |
| 2361 | 3621 append_secondary_free_list_if_not_empty_with_lock(); |
| 2152 | 3622 } |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3623 |
|
3867
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
3624 assert(check_young_list_well_formed(), |
|
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
3625 "young list should be well formed"); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3626 |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3627 // 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
|
3628 // 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
|
3629 // it will be set. |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3630 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3631 { // 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
|
3632 IsGCActiveMark x; |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3633 |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3634 gc_prologue(false); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3635 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
|
3636 increment_gc_time_stamp(); |
| 342 | 3637 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3638 if (VerifyBeforeGC && total_collections() >= VerifyGCStartAt) { |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3639 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
|
3640 gclog_or_tty->print(" VerifyBeforeGC:"); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3641 prepare_for_verify(); |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3642 Universe::verify(/* allow dirty */ false, |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3643 /* silent */ false, |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3644 /* option */ VerifyOption_G1UsePrevMarking); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3645 } |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3646 |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3647 COMPILER2_PRESENT(DerivedPointerTable::clear()); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3648 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3649 // Please see comment in g1CollectedHeap.hpp and |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3650 // G1CollectedHeap::ref_processing_init() to see how |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3651 // reference processing currently works in G1. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3652 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3653 // Enable discovery in the STW reference processor |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3654 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3655 true /*verify_no_refs*/); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3656 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3657 { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3658 // We want to temporarily turn off discovery by the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3659 // CM ref processor, if necessary, and turn it back on |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3660 // on again later if we do. Using a scoped |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3661 // NoRefDiscovery object will do this. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3662 NoRefDiscovery no_cm_discovery(ref_processor_cm()); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3663 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3664 // 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
|
3665 // of the collection set!). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3666 release_mutator_alloc_region(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3667 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3668 // We should call this after we retire the mutator alloc |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3669 // region(s) so that all the ALLOC / RETIRE events are generated |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3670 // before the start GC event. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3671 _hr_printer.start_gc(false /* full */, (size_t) total_collections()); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3672 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3673 // The elapsed time induced by the start time below deliberately elides |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3674 // the possible verification above. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3675 double start_time_sec = os::elapsedTime(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3676 size_t start_used_bytes = used(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3677 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3678 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3679 gclog_or_tty->print_cr("\nBefore recording pause start.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3680 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3681 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
|
3682 #endif // YOUNG_LIST_VERBOSE |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3683 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3684 g1_policy()->record_collection_pause_start(start_time_sec, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3685 start_used_bytes); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3686 |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3687 double scan_wait_start = os::elapsedTime(); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3688 // 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
|
3689 // 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
|
3690 // 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
|
3691 // moving them during the GC. |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3692 bool waited = _cm->root_regions()->wait_until_scan_finished(); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3693 if (waited) { |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3694 double scan_wait_end = os::elapsedTime(); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3695 double wait_time_ms = (scan_wait_end - scan_wait_start) * 1000.0; |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3696 g1_policy()->record_root_region_scan_wait_time(wait_time_ms); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3697 } |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3698 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3699 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3700 gclog_or_tty->print_cr("\nAfter recording pause start.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3701 _young_list->print(); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3702 #endif // YOUNG_LIST_VERBOSE |
| 342 | 3703 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3704 if (g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3705 concurrent_mark()->checkpointRootsInitialPre(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3706 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3707 perm_gen()->save_marks(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3708 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3709 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3710 gclog_or_tty->print_cr("\nBefore choosing collection set.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3711 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3712 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
|
3713 #endif // YOUNG_LIST_VERBOSE |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3714 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3715 g1_policy()->choose_collection_set(target_pause_time_ms); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3716 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3717 _cm->note_start_of_gc(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3718 // 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
|
3719 // we have not filtered them yet (we'll do so during the |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3720 // GC). We also call this after choose_collection_set() to |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3721 // ensure that the CSet has been finalized. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3722 _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
|
3723 true /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3724 false /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3725 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3726 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3727 if (_hr_printer.is_active()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3728 HeapRegion* hr = g1_policy()->collection_set(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3729 while (hr != NULL) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3730 G1HRPrinter::RegionType type; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3731 if (!hr->is_young()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3732 type = G1HRPrinter::Old; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3733 } else if (hr->is_survivor()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3734 type = G1HRPrinter::Survivor; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3735 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3736 type = G1HRPrinter::Eden; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3737 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3738 _hr_printer.cset(hr); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3739 hr = hr->next_in_collection_set(); |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
3740 } |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
3741 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3742 |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3743 #ifdef ASSERT |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3744 VerifyCSetClosure cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3745 collection_set_iterate(&cl); |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3746 #endif // ASSERT |
| 1707 | 3747 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3748 setup_surviving_young_words(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3749 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3750 // Initialize the GC alloc regions. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3751 init_gc_alloc_regions(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3752 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3753 // Actually do the work... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3754 evacuate_collection_set(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3755 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3756 // 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
|
3757 // (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
|
3758 // 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
|
3759 // 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
|
3760 // we checked. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3761 _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
|
3762 false /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3763 true /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3764 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3765 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3766 free_collection_set(g1_policy()->collection_set()); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3767 g1_policy()->clear_collection_set(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3768 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3769 cleanup_surviving_young_words(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3770 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3771 // Start a new incremental collection set for the next pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3772 g1_policy()->start_incremental_cset_building(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3773 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3774 // Clear the _cset_fast_test bitmap in anticipation of adding |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3775 // regions to the incremental collection set for the next |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3776 // evacuation pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3777 clear_cset_fast_test(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3778 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3779 _young_list->reset_sampled_info(); |
|
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 // Don't check the whole heap at this point as the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3782 // GC alloc regions from this pause have been tagged |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3783 // as survivors and moved on to the survivor list. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3784 // Survivor regions will fail the !is_young() check. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3785 assert(check_young_list_empty(false /* check_heap */), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3786 "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
|
3787 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3788 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3789 gclog_or_tty->print_cr("Before recording survivors.\nYoung List:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3790 _young_list->print(); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3791 #endif // YOUNG_LIST_VERBOSE |
| 342 | 3792 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3793 g1_policy()->record_survivor_regions(_young_list->survivor_length(), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3794 _young_list->first_survivor_region(), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3795 _young_list->last_survivor_region()); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3796 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3797 _young_list->reset_auxilary_lists(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3798 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3799 if (evacuation_failed()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3800 _summary_bytes_used = recalculate_used(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3801 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3802 // The "used" of the the collection set have already been subtracted |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3803 // when they were freed. Add in the bytes evacuated. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3804 _summary_bytes_used += g1_policy()->bytes_copied_during_gc(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3805 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3806 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3807 if (g1_policy()->during_initial_mark_pause()) { |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3808 // 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
|
3809 // 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
|
3810 // appropriate initialization is done on the CM object. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3811 concurrent_mark()->checkpointRootsInitialPost(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3812 set_marking_started(); |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3813 // 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
|
3814 // 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
|
3815 // the current thread has completed its logging output. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3816 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3817 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3818 allocate_dummy_regions(); |
|
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
3819 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3820 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3821 gclog_or_tty->print_cr("\nEnd of the pause.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3822 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3823 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
|
3824 #endif // YOUNG_LIST_VERBOSE |
| 342 | 3825 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3826 init_mutator_alloc_region(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3827 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3828 { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3829 size_t expand_bytes = g1_policy()->expansion_amount(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3830 if (expand_bytes > 0) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3831 size_t bytes_before = capacity(); |
| 4785 | 3832 // No need for an ergo verbose message here, |
| 3833 // expansion_amount() does this when it returns a value > 0. | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3834 if (!expand(expand_bytes)) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3835 // We failed to expand the heap so let's verify that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3836 // committed/uncommitted amount match the backing store |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3837 assert(capacity() == _g1_storage.committed_size(), "committed size mismatch"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3838 assert(max_capacity() == _g1_storage.reserved_size(), "reserved size mismatch"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3839 } |
|
3920
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
3840 } |
|
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
3841 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3842 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3843 // 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
|
3844 // 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
|
3845 _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
|
3846 true /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3847 true /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3848 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3849 _cm->note_end_of_gc(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3850 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3851 double end_time_sec = os::elapsedTime(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3852 double pause_time_ms = (end_time_sec - start_time_sec) * MILLIUNITS; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3853 g1_policy()->record_pause_time_ms(pause_time_ms); |
| 4711 | 3854 int active_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
| 3855 workers()->active_workers() : 1); | |
| 3856 g1_policy()->record_collection_pause_end(active_workers); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3857 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3858 MemoryService::track_memory_usage(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3859 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3860 // 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
|
3861 // update buffers to bring the RSets up-to-date if |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3862 // G1HRRSFlushLogBuffersOnVerify has been set. While scanning |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3863 // 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
|
3864 // regions we just allocated to (i.e., the GC alloc |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3865 // regions). However, during the last GC we called |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3866 // set_saved_mark() on all the GC alloc regions, so card |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3867 // scanning might skip the [saved_mark_word()...top()] area of |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3868 // those regions (i.e., the area we allocated objects into |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3869 // during the last GC). But it shouldn't. Given that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3870 // saved_mark_word() is conditional on whether the GC time stamp |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3871 // 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
|
3872 // 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
|
3873 // regions and saved_mark_word() will simply return top() for |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3874 // 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
|
3875 // than iterating over the regions and fixing them. In fact, the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3876 // GC time stamp increment here also ensures that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3877 // saved_mark_word() will return top() between pauses, i.e., |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3878 // during concurrent refinement. So we don't need the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3879 // is_gc_active() check to decided which top to use when |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3880 // scanning cards (see CR 7039627). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3881 increment_gc_time_stamp(); |
|
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 if (VerifyAfterGC && total_collections() >= VerifyGCStartAt) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3884 HandleMark hm; // Discard invalid handles created during verification |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3885 gclog_or_tty->print(" VerifyAfterGC:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3886 prepare_for_verify(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3887 Universe::verify(/* allow dirty */ true, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3888 /* silent */ false, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3889 /* option */ VerifyOption_G1UsePrevMarking); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3890 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3891 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3892 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3893 ref_processor_stw()->verify_no_references_recorded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3894 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3895 // 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
|
3896 } |
|
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
3897 |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
3898 // 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
|
3899 // 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
|
3900 // 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
|
3901 // RETIRE events are generated before the end GC event. |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
3902 _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
|
3903 |
|
3764
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
3378
diff
changeset
|
3904 // We have to do this after we decide whether to expand the heap or not. |
|
053d84a76d3d
7032531: G1: enhance GC logging to include more accurate eden / survivor size transitions
tonyp
parents:
3378
diff
changeset
|
3905 g1_policy()->print_heap_transition(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3906 |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3907 if (mark_in_progress()) { |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3908 concurrent_mark()->update_g1_committed(); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3909 } |
|
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
3910 |
|
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
3911 #ifdef TRACESPINNING |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3912 ParallelTaskTerminator::print_termination_counts(); |
|
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
3913 #endif |
| 342 | 3914 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3915 gc_epilogue(false); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3916 } |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3917 |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3918 if (ExitAfterGCNum > 0 && total_collections() == ExitAfterGCNum) { |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3919 gclog_or_tty->print_cr("Stopping after GC #%d", ExitAfterGCNum); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3920 print_tracing_info(); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3921 vm_exit(-1); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3922 } |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3923 } |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3924 |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3925 // The closing of the inner scope, immediately above, will complete |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3926 // the PrintGC logging output. The record_collection_pause_end() call |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3927 // above will complete the logging output of PrintGCDetails. |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3928 // |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3929 // It is not yet to safe, however, to tell the concurrent mark to |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3930 // start as we have some optional output below. We don't want the |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3931 // output from the concurrent mark thread interfering with this |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3932 // logging output either. |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3933 |
| 3766 | 3934 _hrs.verify_optional(); |
| 2152 | 3935 verify_region_sets_optional(); |
| 3936 | |
| 1709 | 3937 TASKQUEUE_STATS_ONLY(if (ParallelGCVerbose) print_taskqueue_stats()); |
| 3938 TASKQUEUE_STATS_ONLY(reset_taskqueue_stats()); | |
| 3939 | |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3940 if (PrintHeapAtGC) { |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3941 Universe::print_heap_after_gc(); |
| 342 | 3942 } |
|
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
3943 g1mm()->update_sizes(); |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
3944 |
|
884
83b687ce3090
6866591: G1: print update buffer processing stats more often
tonyp
parents:
883
diff
changeset
|
3945 if (G1SummarizeRSetStats && |
|
83b687ce3090
6866591: G1: print update buffer processing stats more often
tonyp
parents:
883
diff
changeset
|
3946 (G1SummarizeRSetStatsPeriod > 0) && |
|
83b687ce3090
6866591: G1: print update buffer processing stats more often
tonyp
parents:
883
diff
changeset
|
3947 (total_collections() % G1SummarizeRSetStatsPeriod == 0)) { |
|
83b687ce3090
6866591: G1: print update buffer processing stats more often
tonyp
parents:
883
diff
changeset
|
3948 g1_rem_set()->print_summary_info(); |
|
83b687ce3090
6866591: G1: print update buffer processing stats more often
tonyp
parents:
883
diff
changeset
|
3949 } |
| 1973 | 3950 |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3951 // 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
|
3952 // 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
|
3953 // that came from the pause. |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3954 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3955 if (should_start_conc_mark) { |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3956 // CAUTION: after the doConcurrentMark() call below, |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3957 // the concurrent marking thread(s) could be running |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3958 // concurrently with us. Make sure that anything after |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3959 // 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
|
3960 // 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
|
3961 // 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
|
3962 // ConcurrentGCThread::safepoint_desynchronize(). |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3963 doConcurrentMark(); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3964 } |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3965 |
| 1973 | 3966 return true; |
| 342 | 3967 } |
| 3968 | |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
3969 size_t G1CollectedHeap::desired_plab_sz(GCAllocPurpose purpose) |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
3970 { |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
3971 size_t gclab_word_size; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
3972 switch (purpose) { |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
3973 case GCAllocForSurvived: |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
3974 gclab_word_size = YoungPLABSize; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
3975 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
3976 case GCAllocForTenured: |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
3977 gclab_word_size = OldPLABSize; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
3978 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
3979 default: |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
3980 assert(false, "unknown GCAllocPurpose"); |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
3981 gclab_word_size = OldPLABSize; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
3982 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
3983 } |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
3984 return gclab_word_size; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
3985 } |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
3986 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3987 void G1CollectedHeap::init_mutator_alloc_region() { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3988 assert(_mutator_alloc_region.get() == NULL, "pre-condition"); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3989 _mutator_alloc_region.init(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3990 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3991 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3992 void G1CollectedHeap::release_mutator_alloc_region() { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3993 _mutator_alloc_region.release(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3994 assert(_mutator_alloc_region.get() == NULL, "post-condition"); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3995 } |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
3996 |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
3997 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
|
3998 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
|
3999 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4000 _survivor_gc_alloc_region.init(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4001 _old_gc_alloc_region.init(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4002 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
|
4003 _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
|
4004 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4005 // 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
|
4006 // 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
|
4007 // 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
|
4008 // 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
|
4009 // 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
|
4010 // 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
|
4011 // 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
|
4012 // 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
|
4013 // 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
|
4014 if (retained_region != NULL && |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4015 !retained_region->in_collection_set() && |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4016 !(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
|
4017 !retained_region->is_empty() && |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4018 !retained_region->isHumongous()) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4019 retained_region->set_saved_mark(); |
| 4072 | 4020 // The retained region was added to the old region set when it was |
| 4021 // retired. We have to remove it now, since we don't allow regions | |
| 4022 // we allocate to in the region sets. We'll re-add it later, when | |
| 4023 // it's retired again. | |
| 4024 _old_set.remove(retained_region); | |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4025 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
|
4026 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
|
4027 _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
|
4028 _hr_printer.reuse(retained_region); |
| 342 | 4029 } |
| 4030 } | |
| 4031 | |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4032 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
|
4033 _survivor_gc_alloc_region.release(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4034 // 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
|
4035 // _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
|
4036 // _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
|
4037 // 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
|
4038 // condition. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4039 _retained_old_gc_alloc_region = _old_gc_alloc_region.release(); |
| 342 | 4040 } |
| 4041 | |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4042 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
|
4043 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
|
4044 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
|
4045 _retained_old_gc_alloc_region = NULL; |
| 342 | 4046 } |
| 4047 | |
| 4048 void G1CollectedHeap::init_for_evac_failure(OopsInHeapRegionClosure* cl) { | |
| 4049 _drain_in_progress = false; | |
| 4050 set_evac_failure_closure(cl); | |
| 4051 _evac_failure_scan_stack = new (ResourceObj::C_HEAP) GrowableArray<oop>(40, true); | |
| 4052 } | |
| 4053 | |
| 4054 void G1CollectedHeap::finalize_for_evac_failure() { | |
| 4055 assert(_evac_failure_scan_stack != NULL && | |
| 4056 _evac_failure_scan_stack->length() == 0, | |
| 4057 "Postcondition"); | |
| 4058 assert(!_drain_in_progress, "Postcondition"); | |
| 1045 | 4059 delete _evac_failure_scan_stack; |
| 342 | 4060 _evac_failure_scan_stack = NULL; |
| 4061 } | |
| 4062 | |
| 4063 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
|
4064 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
|
4065 assert(g1_policy()->assertMarkedBytesDataOK(), "Should be!"); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4066 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4067 G1ParRemoveSelfForwardPtrsTask rsfp_task(this); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4068 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4069 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4070 set_par_threads(); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4071 workers()->run_task(&rsfp_task); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4072 set_par_threads(0); |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
4073 } else { |
|
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4074 rsfp_task.work(0); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4075 } |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4076 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4077 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
|
4078 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4079 // 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
|
4080 reset_cset_heap_region_claim_values(); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4081 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4082 assert(check_cset_heap_region_claim_values(HeapRegion::InitialClaimValue), "sanity"); |
| 342 | 4083 assert(g1_policy()->assertMarkedBytesDataOK(), "Should be!"); |
| 4084 | |
| 4085 // Now restore saved marks, if any. | |
| 4086 if (_objs_with_preserved_marks != NULL) { | |
| 4087 assert(_preserved_marks_of_objs != NULL, "Both or none."); | |
| 4088 guarantee(_objs_with_preserved_marks->length() == | |
| 4089 _preserved_marks_of_objs->length(), "Both or none."); | |
| 4090 for (int i = 0; i < _objs_with_preserved_marks->length(); i++) { | |
| 4091 oop obj = _objs_with_preserved_marks->at(i); | |
| 4092 markOop m = _preserved_marks_of_objs->at(i); | |
| 4093 obj->set_mark(m); | |
| 4094 } | |
|
4783
023652e49ac0
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johnc
parents:
4781
diff
changeset
|
4095 |
| 342 | 4096 // Delete the preserved marks growable arrays (allocated on the C heap). |
| 4097 delete _objs_with_preserved_marks; | |
| 4098 delete _preserved_marks_of_objs; | |
| 4099 _objs_with_preserved_marks = NULL; | |
| 4100 _preserved_marks_of_objs = NULL; | |
| 4101 } | |
| 4102 } | |
| 4103 | |
| 4104 void G1CollectedHeap::push_on_evac_failure_scan_stack(oop obj) { | |
| 4105 _evac_failure_scan_stack->push(obj); | |
| 4106 } | |
| 4107 | |
| 4108 void G1CollectedHeap::drain_evac_failure_scan_stack() { | |
| 4109 assert(_evac_failure_scan_stack != NULL, "precondition"); | |
| 4110 | |
| 4111 while (_evac_failure_scan_stack->length() > 0) { | |
| 4112 oop obj = _evac_failure_scan_stack->pop(); | |
| 4113 _evac_failure_closure->set_region(heap_region_containing(obj)); | |
| 4114 obj->oop_iterate_backwards(_evac_failure_closure); | |
| 4115 } | |
| 4116 } | |
| 4117 | |
| 4118 oop | |
| 4119 G1CollectedHeap::handle_evacuation_failure_par(OopsInHeapRegionClosure* cl, | |
|
4787
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6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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4785
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|
4120 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
|
4121 assert(obj_in_cs(old), |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
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parents:
3317
diff
changeset
|
4122 err_msg("obj: "PTR_FORMAT" should still be in the CSet", |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
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3317
diff
changeset
|
4123 (HeapWord*) old)); |
| 342 | 4124 markOop m = old->mark(); |
| 4125 oop forward_ptr = old->forward_to_atomic(old); | |
| 4126 if (forward_ptr == NULL) { | |
| 4127 // Forward-to-self succeeded. | |
|
3973
663cb89032b1
7092412: G1: Some roots not marked during an initial mark that gets an evacuation failure
johnc
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3920
diff
changeset
|
4128 |
| 342 | 4129 if (_evac_failure_closure != cl) { |
| 4130 MutexLockerEx x(EvacFailureStack_lock, Mutex::_no_safepoint_check_flag); | |
| 4131 assert(!_drain_in_progress, | |
| 4132 "Should only be true while someone holds the lock."); | |
| 4133 // Set the global evac-failure closure to the current thread's. | |
| 4134 assert(_evac_failure_closure == NULL, "Or locking has failed."); | |
| 4135 set_evac_failure_closure(cl); | |
| 4136 // Now do the common part. | |
| 4137 handle_evacuation_failure_common(old, m); | |
| 4138 // Reset to NULL. | |
| 4139 set_evac_failure_closure(NULL); | |
| 4140 } else { | |
| 4141 // The lock is already held, and this is recursive. | |
| 4142 assert(_drain_in_progress, "This should only be the recursive case."); | |
| 4143 handle_evacuation_failure_common(old, m); | |
| 4144 } | |
| 4145 return old; | |
| 4146 } else { | |
|
3323
75af3e8de182
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3317
diff
changeset
|
4147 // 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 ...
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diff
changeset
|
4148 // 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 ...
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3317
diff
changeset
|
4149 // self-forwarding it (old == forward_ptr). |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
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diff
changeset
|
4150 assert(old == forward_ptr || !obj_in_cs(forward_ptr), |
|
75af3e8de182
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diff
changeset
|
4151 err_msg("obj: "PTR_FORMAT" forwarded to: "PTR_FORMAT" " |
|
75af3e8de182
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diff
changeset
|
4152 "should not be in the CSet", |
|
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changeset
|
4153 (HeapWord*) old, (HeapWord*) forward_ptr)); |
| 342 | 4154 return forward_ptr; |
| 4155 } | |
| 4156 } | |
| 4157 | |
| 4158 void G1CollectedHeap::handle_evacuation_failure_common(oop old, markOop m) { | |
| 4159 set_evacuation_failed(true); | |
| 4160 | |
| 4161 preserve_mark_if_necessary(old, m); | |
| 4162 | |
| 4163 HeapRegion* r = heap_region_containing(old); | |
| 4164 if (!r->evacuation_failed()) { | |
| 4165 r->set_evacuation_failed(true); | |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
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3777
diff
changeset
|
4166 _hr_printer.evac_failure(r); |
| 342 | 4167 } |
| 4168 | |
| 4169 push_on_evac_failure_scan_stack(old); | |
| 4170 | |
| 4171 if (!_drain_in_progress) { | |
| 4172 // prevent recursion in copy_to_survivor_space() | |
| 4173 _drain_in_progress = true; | |
| 4174 drain_evac_failure_scan_stack(); | |
| 4175 _drain_in_progress = false; | |
| 4176 } | |
| 4177 } | |
| 4178 | |
| 4179 void G1CollectedHeap::preserve_mark_if_necessary(oop obj, markOop m) { | |
|
2038
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
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2037
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changeset
|
4180 assert(evacuation_failed(), "Oversaving!"); |
|
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
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2037
diff
changeset
|
4181 // We want to call the "for_promotion_failure" version only in the |
|
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
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2037
diff
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|
4182 // case of a promotion failure. |
|
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
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2037
diff
changeset
|
4183 if (m->must_be_preserved_for_promotion_failure(obj)) { |
| 342 | 4184 if (_objs_with_preserved_marks == NULL) { |
| 4185 assert(_preserved_marks_of_objs == NULL, "Both or none."); | |
| 4186 _objs_with_preserved_marks = | |
| 4187 new (ResourceObj::C_HEAP) GrowableArray<oop>(40, true); | |
| 4188 _preserved_marks_of_objs = | |
| 4189 new (ResourceObj::C_HEAP) GrowableArray<markOop>(40, true); | |
| 4190 } | |
| 4191 _objs_with_preserved_marks->push(obj); | |
| 4192 _preserved_marks_of_objs->push(m); | |
| 4193 } | |
| 4194 } | |
| 4195 | |
| 4196 HeapWord* G1CollectedHeap::par_allocate_during_gc(GCAllocPurpose purpose, | |
| 4197 size_t word_size) { | |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
diff
changeset
|
4198 if (purpose == GCAllocForSurvived) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
diff
changeset
|
4199 HeapWord* result = survivor_attempt_allocation(word_size); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
diff
changeset
|
4200 if (result != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4201 return result; |
| 342 | 4202 } else { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4203 // 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
|
4204 // object there. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
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3824
diff
changeset
|
4205 return old_attempt_allocation(word_size); |
| 342 | 4206 } |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4207 } else { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4208 assert(purpose == GCAllocForTenured, "sanity"); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4209 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
|
4210 if (result != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4211 return result; |
| 342 | 4212 } else { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4213 // 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
|
4214 // object there. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4215 return survivor_attempt_allocation(word_size); |
| 342 | 4216 } |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4217 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4218 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4219 ShouldNotReachHere(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4220 // 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
|
4221 return NULL; |
| 342 | 4222 } |
| 4223 | |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4224 G1ParGCAllocBuffer::G1ParGCAllocBuffer(size_t gclab_word_size) : |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
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4785
diff
changeset
|
4225 ParGCAllocBuffer(gclab_word_size), _retired(false) { } |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4226 |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4227 G1ParScanThreadState::G1ParScanThreadState(G1CollectedHeap* g1h, uint queue_num) |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4228 : _g1h(g1h), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
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838
diff
changeset
|
4229 _refs(g1h->task_queue(queue_num)), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4230 _dcq(&g1h->dirty_card_queue_set()), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4231 _ct_bs((CardTableModRefBS*)_g1h->barrier_set()), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4232 _g1_rem(g1h->g1_rem_set()), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4233 _hash_seed(17), _queue_num(queue_num), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4234 _term_attempts(0), |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4235 _surviving_alloc_buffer(g1h->desired_plab_sz(GCAllocForSurvived)), |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4236 _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
|
4237 _age_table(false), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4238 _strong_roots_time(0), _term_time(0), |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
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4785
diff
changeset
|
4239 _alloc_buffer_waste(0), _undo_waste(0) { |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4240 // we allocate G1YoungSurvRateNumRegions plus one entries, since |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4241 // 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
|
4242 // non-young regions (where the age is -1) |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4243 // 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
|
4244 // an attempt to eliminate cache contention |
|
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4073
diff
changeset
|
4245 size_t real_length = 1 + _g1h->g1_policy()->young_cset_region_length(); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4246 size_t array_length = PADDING_ELEM_NUM + |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4247 real_length + |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4248 PADDING_ELEM_NUM; |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4249 _surviving_young_words_base = NEW_C_HEAP_ARRAY(size_t, array_length); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
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diff
changeset
|
4250 if (_surviving_young_words_base == NULL) |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4251 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
|
4252 "Not enough space for young surv histo."); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4253 _surviving_young_words = _surviving_young_words_base + PADDING_ELEM_NUM; |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
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diff
changeset
|
4254 memset(_surviving_young_words, 0, real_length * sizeof(size_t)); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
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diff
changeset
|
4255 |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4256 _alloc_buffers[GCAllocForSurvived] = &_surviving_alloc_buffer; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4257 _alloc_buffers[GCAllocForTenured] = &_tenured_alloc_buffer; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4258 |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4259 _start = os::elapsedTime(); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
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parents:
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diff
changeset
|
4260 } |
| 342 | 4261 |
| 1709 | 4262 void |
| 4263 G1ParScanThreadState::print_termination_stats_hdr(outputStream* const st) | |
| 4264 { | |
| 4265 st->print_raw_cr("GC Termination Stats"); | |
| 4266 st->print_raw_cr(" elapsed --strong roots-- -------termination-------" | |
| 4267 " ------waste (KiB)------"); | |
| 4268 st->print_raw_cr("thr ms ms % ms % attempts" | |
| 4269 " total alloc undo"); | |
| 4270 st->print_raw_cr("--- --------- --------- ------ --------- ------ --------" | |
| 4271 " ------- ------- -------"); | |
| 4272 } | |
| 4273 | |
| 4274 void | |
| 4275 G1ParScanThreadState::print_termination_stats(int i, | |
| 4276 outputStream* const st) const | |
| 4277 { | |
| 4278 const double elapsed_ms = elapsed_time() * 1000.0; | |
| 4279 const double s_roots_ms = strong_roots_time() * 1000.0; | |
| 4280 const double term_ms = term_time() * 1000.0; | |
| 4281 st->print_cr("%3d %9.2f %9.2f %6.2f " | |
| 4282 "%9.2f %6.2f " SIZE_FORMAT_W(8) " " | |
| 4283 SIZE_FORMAT_W(7) " " SIZE_FORMAT_W(7) " " SIZE_FORMAT_W(7), | |
| 4284 i, elapsed_ms, s_roots_ms, s_roots_ms * 100 / elapsed_ms, | |
| 4285 term_ms, term_ms * 100 / elapsed_ms, term_attempts(), | |
| 4286 (alloc_buffer_waste() + undo_waste()) * HeapWordSize / K, | |
| 4287 alloc_buffer_waste() * HeapWordSize / K, | |
| 4288 undo_waste() * HeapWordSize / K); | |
| 4289 } | |
| 4290 | |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4291 #ifdef ASSERT |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4292 bool G1ParScanThreadState::verify_ref(narrowOop* ref) const { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4293 assert(ref != NULL, "invariant"); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4294 assert(UseCompressedOops, "sanity"); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4295 assert(!has_partial_array_mask(ref), err_msg("ref=" PTR_FORMAT, ref)); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4296 oop p = oopDesc::load_decode_heap_oop(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4297 assert(_g1h->is_in_g1_reserved(p), |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4298 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, intptr_t(p))); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4299 return true; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4300 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4301 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4302 bool G1ParScanThreadState::verify_ref(oop* ref) const { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4303 assert(ref != NULL, "invariant"); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4304 if (has_partial_array_mask(ref)) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4305 // Must be in the collection set--it's already been copied. |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4306 oop p = clear_partial_array_mask(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4307 assert(_g1h->obj_in_cs(p), |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4308 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, intptr_t(p))); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4309 } else { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4310 oop p = oopDesc::load_decode_heap_oop(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4311 assert(_g1h->is_in_g1_reserved(p), |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4312 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, intptr_t(p))); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4313 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4314 return true; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4315 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4316 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4317 bool G1ParScanThreadState::verify_task(StarTask ref) const { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4318 if (ref.is_narrow()) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4319 return verify_ref((narrowOop*) ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4320 } else { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4321 return verify_ref((oop*) ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4322 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4323 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4324 #endif // ASSERT |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4325 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4326 void G1ParScanThreadState::trim_queue() { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4327 assert(_evac_cl != NULL, "not set"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4328 assert(_evac_failure_cl != NULL, "not set"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4329 assert(_partial_scan_cl != NULL, "not set"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4330 |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4331 StarTask ref; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4332 do { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4333 // Drain the overflow stack first, so other threads can steal. |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4334 while (refs()->pop_overflow(ref)) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4335 deal_with_reference(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4336 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4337 |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4338 while (refs()->pop_local(ref)) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4339 deal_with_reference(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4340 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4341 } while (!refs()->is_empty()); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4342 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4343 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4344 G1ParClosureSuper::G1ParClosureSuper(G1CollectedHeap* g1, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4345 G1ParScanThreadState* par_scan_state) : |
| 342 | 4346 _g1(g1), _g1_rem(_g1->g1_rem_set()), _cm(_g1->concurrent_mark()), |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4347 _par_scan_state(par_scan_state), |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4348 _worker_id(par_scan_state->queue_num()), |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4349 _during_initial_mark(_g1->g1_policy()->during_initial_mark_pause()), |
|
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4350 _mark_in_progress(_g1->mark_in_progress()) { } |
|
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4351 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4352 void G1ParCopyHelper::mark_object(oop obj) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4353 #ifdef ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4354 HeapRegion* hr = _g1->heap_region_containing(obj); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4355 assert(hr != NULL, "sanity"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4356 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
|
4357 #endif // ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4358 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4359 // We know that the object is not moving so it's safe to read its size. |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4360 _cm->grayRoot(obj, (size_t) obj->size(), _worker_id); |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4361 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4362 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4363 void G1ParCopyHelper::mark_forwarded_object(oop from_obj, oop to_obj) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4364 #ifdef ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4365 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
|
4366 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
|
4367 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
|
4368 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4369 HeapRegion* from_hr = _g1->heap_region_containing(from_obj); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4370 assert(from_hr != NULL, "sanity"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4371 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
|
4372 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4373 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
|
4374 assert(to_hr != NULL, "sanity"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4375 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
|
4376 #endif // ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4377 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4378 // 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
|
4379 // 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
|
4380 // 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
|
4381 // image which we know should not be changing. |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4382 _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
|
4383 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4384 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4385 oop G1ParCopyHelper::copy_to_survivor_space(oop old) { |
| 342 | 4386 size_t word_sz = old->size(); |
| 4387 HeapRegion* from_region = _g1->heap_region_containing_raw(old); | |
| 4388 // +1 to make the -1 indexes valid... | |
| 4389 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
|
4390 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
|
4391 (!from_region->is_young() && young_index == 0), "invariant" ); |
| 342 | 4392 G1CollectorPolicy* g1p = _g1->g1_policy(); |
| 4393 markOop m = old->mark(); | |
| 545 | 4394 int age = m->has_displaced_mark_helper() ? m->displaced_mark_helper()->age() |
| 4395 : m->age(); | |
| 4396 GCAllocPurpose alloc_purpose = g1p->evacuation_destination(from_region, age, | |
| 342 | 4397 word_sz); |
| 4398 HeapWord* obj_ptr = _par_scan_state->allocate(alloc_purpose, word_sz); | |
| 4399 oop obj = oop(obj_ptr); | |
| 4400 | |
| 4401 if (obj_ptr == NULL) { | |
| 4402 // This will either forward-to-self, or detect that someone else has | |
| 4403 // installed a forwarding pointer. | |
| 4404 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
|
4405 return _g1->handle_evacuation_failure_par(cl, old); |
| 342 | 4406 } |
| 4407 | |
| 526 | 4408 // We're going to allocate linearly, so might as well prefetch ahead. |
| 4409 Prefetch::write(obj_ptr, PrefetchCopyIntervalInBytes); | |
| 4410 | |
| 342 | 4411 oop forward_ptr = old->forward_to_atomic(obj); |
| 4412 if (forward_ptr == NULL) { | |
| 4413 Copy::aligned_disjoint_words((HeapWord*) old, obj_ptr, word_sz); | |
| 526 | 4414 if (g1p->track_object_age(alloc_purpose)) { |
| 4415 // We could simply do obj->incr_age(). However, this causes a | |
| 4416 // performance issue. obj->incr_age() will first check whether | |
| 4417 // the object has a displaced mark by checking its mark word; | |
| 4418 // getting the mark word from the new location of the object | |
| 4419 // stalls. So, given that we already have the mark word and we | |
| 4420 // are about to install it anyway, it's better to increase the | |
| 4421 // age on the mark word, when the object does not have a | |
| 4422 // displaced mark word. We're not expecting many objects to have | |
| 4423 // a displaced marked word, so that case is not optimized | |
| 4424 // further (it could be...) and we simply call obj->incr_age(). | |
| 4425 | |
| 4426 if (m->has_displaced_mark_helper()) { | |
| 4427 // in this case, we have to install the mark word first, | |
| 4428 // otherwise obj looks to be forwarded (the old mark word, | |
| 4429 // which contains the forward pointer, was copied) | |
| 4430 obj->set_mark(m); | |
| 4431 obj->incr_age(); | |
| 4432 } else { | |
| 4433 m = m->incr_age(); | |
| 545 | 4434 obj->set_mark(m); |
| 526 | 4435 } |
| 545 | 4436 _par_scan_state->age_table()->add(obj, word_sz); |
| 4437 } else { | |
| 4438 obj->set_mark(m); | |
| 526 | 4439 } |
| 4440 | |
| 342 | 4441 size_t* surv_young_words = _par_scan_state->surviving_young_words(); |
| 4442 surv_young_words[young_index] += word_sz; | |
| 4443 | |
| 4444 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
|
4445 // 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
|
4446 // 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
|
4447 // 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
|
4448 arrayOop(obj)->set_length(0); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4449 oop* old_p = set_partial_array_mask(old); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4450 _par_scan_state->push_on_queue(old_p); |
| 342 | 4451 } else { |
| 526 | 4452 // No point in using the slower heap_region_containing() method, |
| 4453 // given that we know obj is in the heap. | |
| 4454 _scanner->set_region(_g1->heap_region_containing_raw(obj)); | |
| 342 | 4455 obj->oop_iterate_backwards(_scanner); |
| 4456 } | |
| 4457 } else { | |
| 4458 _par_scan_state->undo_allocation(alloc_purpose, obj_ptr, word_sz); | |
| 4459 obj = forward_ptr; | |
| 4460 } | |
| 4461 return obj; | |
| 4462 } | |
| 4463 | |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4464 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
|
4465 template <class T> |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4466 void G1ParCopyClosure<do_gen_barrier, barrier, do_mark_object> |
|
845
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6700789: G1: Enable use of compressed oops with G1 heaps
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|
4467 ::do_oop_work(T* p) { |
|
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6700789: G1: Enable use of compressed oops with G1 heaps
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|
4468 oop obj = oopDesc::load_decode_heap_oop(p); |
| 342 | 4469 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
|
4470 "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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diff
changeset
|
4471 |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4472 assert(_worker_id == _par_scan_state->queue_num(), "sanity"); |
|
d30fa85f9994
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johnc
parents:
4834
diff
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|
4473 |
| 526 | 4474 // here the null check is implicit in the cset_fast_test() test |
|
1261
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iveresov
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1245
diff
changeset
|
4475 if (_g1->in_cset_fast_test(obj)) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4476 oop forwardee; |
| 526 | 4477 if (obj->is_forwarded()) { |
|
4787
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6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
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|
4478 forwardee = obj->forwardee(); |
| 526 | 4479 } else { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4480 forwardee = copy_to_survivor_space(obj); |
| 342 | 4481 } |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
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diff
changeset
|
4482 assert(forwardee != NULL, "forwardee should not be NULL"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
4785
diff
changeset
|
4483 oopDesc::encode_store_heap_oop(p, forwardee); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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4785
diff
changeset
|
4484 if (do_mark_object && forwardee != obj) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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4785
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changeset
|
4485 // 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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parents:
4785
diff
changeset
|
4486 // 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
|
4487 mark_forwarded_object(obj, forwardee); |
|
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
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diff
changeset
|
4489 |
| 526 | 4490 // When scanning the RS, we only care about objs in CS. |
| 4491 if (barrier == G1BarrierRS) { | |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
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diff
changeset
|
4492 _par_scan_state->update_rs(_from, p, _worker_id); |
| 342 | 4493 } |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
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parents:
3869
diff
changeset
|
4494 } else { |
|
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
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parents:
3869
diff
changeset
|
4495 // 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
|
4496 // closure during an initial mark pause (i.e. do_mark_object will |
|
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
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parents:
3869
diff
changeset
|
4497 // be true) then attempt to mark the object. |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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4785
diff
changeset
|
4498 if (do_mark_object && _g1->is_in_g1_reserved(obj)) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
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diff
changeset
|
4499 mark_object(obj); |
|
3886
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7080389: G1: refactor marking code in evacuation pause copy closures
johnc
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diff
changeset
|
4500 } |
| 526 | 4501 } |
| 4502 | |
| 4503 if (barrier == G1BarrierEvac && obj != NULL) { | |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
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parents:
4834
diff
changeset
|
4504 _par_scan_state->update_rs(_from, p, _worker_id); |
| 526 | 4505 } |
| 4506 | |
| 4507 if (do_gen_barrier && obj != NULL) { | |
| 4508 par_do_barrier(p); | |
| 4509 } | |
| 4510 } | |
| 4511 | |
|
1261
0414c1049f15
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parents:
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diff
changeset
|
4512 template void G1ParCopyClosure<false, G1BarrierEvac, false>::do_oop_work(oop* p); |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
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diff
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|
4513 template void G1ParCopyClosure<false, G1BarrierEvac, false>::do_oop_work(narrowOop* p); |
|
845
df6caf649ff7
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|
4514 |
|
df6caf649ff7
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diff
changeset
|
4515 template <class T> void G1ParScanPartialArrayClosure::do_oop_nv(T* p) { |
| 526 | 4516 assert(has_partial_array_mask(p), "invariant"); |
|
4784
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
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4783
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changeset
|
4517 oop from_obj = clear_partial_array_mask(p); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
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diff
changeset
|
4518 |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
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diff
changeset
|
4519 assert(Universe::heap()->is_in_reserved(from_obj), "must be in heap."); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
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parents:
4783
diff
changeset
|
4520 assert(from_obj->is_objArray(), "must be obj array"); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
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diff
changeset
|
4521 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
|
4522 // 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
|
4523 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
|
4524 |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
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parents:
4783
diff
changeset
|
4525 assert(from_obj->is_forwarded(), "must be forwarded"); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
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parents:
4783
diff
changeset
|
4526 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
|
4527 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
|
4528 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
|
4529 // 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
|
4530 // to-space object. |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4531 int next_index = to_obj_array->length(); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
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parents:
4783
diff
changeset
|
4532 assert(0 <= next_index && next_index < length, |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
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parents:
4783
diff
changeset
|
4533 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
|
4534 |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4535 int start = next_index; |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
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parents:
4783
diff
changeset
|
4536 int end = length; |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4537 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
|
4538 // We'll try not to push a range that's smaller than ParGCArrayScanChunk. |
| 342 | 4539 if (remainder > 2 * ParGCArrayScanChunk) { |
| 4540 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
|
4541 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
|
4542 // 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
|
4543 // 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
|
4544 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
|
4545 _par_scan_state->push_on_queue(from_obj_p); |
| 342 | 4546 } else { |
|
4784
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4547 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
|
4548 // 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
|
4549 // 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
|
4550 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
|
4551 } |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4552 _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
|
4553 // 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
|
4554 // 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
|
4555 // 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
|
4556 // 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
|
4557 // 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
|
4558 // 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
|
4559 // 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
|
4560 // 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
|
4561 to_obj_array->oop_iterate_range(&_scanner, start, end); |
| 342 | 4562 } |
| 4563 | |
| 4564 class G1ParEvacuateFollowersClosure : public VoidClosure { | |
| 4565 protected: | |
| 4566 G1CollectedHeap* _g1h; | |
| 4567 G1ParScanThreadState* _par_scan_state; | |
| 4568 RefToScanQueueSet* _queues; | |
| 4569 ParallelTaskTerminator* _terminator; | |
| 4570 | |
| 4571 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } | |
| 4572 RefToScanQueueSet* queues() { return _queues; } | |
| 4573 ParallelTaskTerminator* terminator() { return _terminator; } | |
| 4574 | |
| 4575 public: | |
| 4576 G1ParEvacuateFollowersClosure(G1CollectedHeap* g1h, | |
| 4577 G1ParScanThreadState* par_scan_state, | |
| 4578 RefToScanQueueSet* queues, | |
| 4579 ParallelTaskTerminator* terminator) | |
| 4580 : _g1h(g1h), _par_scan_state(par_scan_state), | |
| 4581 _queues(queues), _terminator(terminator) {} | |
| 4582 | |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4583 void do_void(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4584 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4585 private: |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4586 inline bool offer_termination(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4587 }; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4588 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4589 bool G1ParEvacuateFollowersClosure::offer_termination() { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4590 G1ParScanThreadState* const pss = par_scan_state(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4591 pss->start_term_time(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4592 const bool res = terminator()->offer_termination(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4593 pss->end_term_time(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4594 return res; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4595 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4596 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4597 void G1ParEvacuateFollowersClosure::do_void() { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4598 StarTask stolen_task; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4599 G1ParScanThreadState* const pss = par_scan_state(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4600 pss->trim_queue(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4601 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4602 do { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4603 while (queues()->steal(pss->queue_num(), pss->hash_seed(), stolen_task)) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4604 assert(pss->verify_task(stolen_task), "sanity"); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4605 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
|
4606 pss->deal_with_reference((narrowOop*) stolen_task); |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4607 } else { |
|
1883
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
1862
diff
changeset
|
4608 pss->deal_with_reference((oop*) stolen_task); |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4609 } |
|
1883
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
1862
diff
changeset
|
4610 |
|
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
1862
diff
changeset
|
4611 // 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
|
4612 // available new entries on the queues. So we have to make sure |
|
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|
4613 // we drain the queues as necessary. |
| 342 | 4614 pss->trim_queue(); |
| 4615 } | |
|
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|
4616 } while (!offer_termination()); |
|
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|
4617 |
|
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|
4618 pss->retire_alloc_buffers(); |
|
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|
4619 } |
| 342 | 4620 |
| 4621 class G1ParTask : public AbstractGangTask { | |
| 4622 protected: | |
| 4623 G1CollectedHeap* _g1h; | |
| 4624 RefToScanQueueSet *_queues; | |
| 4625 ParallelTaskTerminator _terminator; | |
|
4728
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|
4626 uint _n_workers; |
| 342 | 4627 |
| 4628 Mutex _stats_lock; | |
| 4629 Mutex* stats_lock() { return &_stats_lock; } | |
| 4630 | |
| 4631 size_t getNCards() { | |
| 4632 return (_g1h->capacity() + G1BlockOffsetSharedArray::N_bytes - 1) | |
| 4633 / G1BlockOffsetSharedArray::N_bytes; | |
| 4634 } | |
| 4635 | |
| 4636 public: | |
|
4095
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|
4637 G1ParTask(G1CollectedHeap* g1h, |
|
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|
4638 RefToScanQueueSet *task_queues) |
| 342 | 4639 : AbstractGangTask("G1 collection"), |
| 4640 _g1h(g1h), | |
| 4641 _queues(task_queues), | |
|
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|
4642 _terminator(0, _queues), |
|
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|
4643 _stats_lock(Mutex::leaf, "parallel G1 stats lock", true) |
| 342 | 4644 {} |
| 4645 | |
| 4646 RefToScanQueueSet* queues() { return _queues; } | |
| 4647 | |
| 4648 RefToScanQueue *work_queue(int i) { | |
| 4649 return queues()->queue(i); | |
| 4650 } | |
| 4651 | |
|
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|
4652 ParallelTaskTerminator* terminator() { return &_terminator; } |
|
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|
4653 |
|
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|
4654 virtual void set_for_termination(int active_workers) { |
|
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|
4655 // This task calls set_n_termination() in par_non_clean_card_iterate_work() |
|
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|
4656 // in the young space (_par_seq_tasks) in the G1 heap |
|
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|
4657 // for SequentialSubTasksDone. |
|
bca17e38de00
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|
4658 // This task also uses SubTasksDone in SharedHeap and G1CollectedHeap |
|
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|
4659 // both of which need setting by set_n_termination(). |
|
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|
4660 _g1h->SharedHeap::set_n_termination(active_workers); |
|
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|
4661 _g1h->set_n_termination(active_workers); |
|
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|
4662 terminator()->reset_for_reuse(active_workers); |
|
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|
4663 _n_workers = active_workers; |
|
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|
4664 } |
|
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|
4665 |
|
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|
4666 void work(uint worker_id) { |
|
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|
4667 if (worker_id >= _n_workers) return; // no work needed this round |
| 1611 | 4668 |
| 4669 double start_time_ms = os::elapsedTime() * 1000.0; | |
|
4728
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|
4670 _g1h->g1_policy()->record_gc_worker_start_time(worker_id, start_time_ms); |
| 1611 | 4671 |
| 342 | 4672 ResourceMark rm; |
| 4673 HandleMark hm; | |
| 4674 | |
|
3979
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|
4675 ReferenceProcessor* rp = _g1h->ref_processor_stw(); |
|
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6484982: G1: process references during evacuation pauses
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|
4676 |
|
4728
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|
4677 G1ParScanThreadState pss(_g1h, worker_id); |
|
3979
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6484982: G1: process references during evacuation pauses
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changeset
|
4678 G1ParScanHeapEvacClosure scan_evac_cl(_g1h, &pss, rp); |
|
4dfb2df418f2
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changeset
|
4679 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, rp); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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|
4680 G1ParScanPartialArrayClosure partial_scan_cl(_g1h, &pss, rp); |
| 342 | 4681 |
| 4682 pss.set_evac_closure(&scan_evac_cl); | |
| 4683 pss.set_evac_failure_closure(&evac_failure_cl); | |
| 4684 pss.set_partial_scan_closure(&partial_scan_cl); | |
| 4685 | |
|
3979
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|
4686 G1ParScanExtRootClosure only_scan_root_cl(_g1h, &pss, rp); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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|
4687 G1ParScanPermClosure only_scan_perm_cl(_g1h, &pss, rp); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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|
4688 |
|
4dfb2df418f2
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|
4689 G1ParScanAndMarkExtRootClosure scan_mark_root_cl(_g1h, &pss, rp); |
|
4dfb2df418f2
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|
4690 G1ParScanAndMarkPermClosure scan_mark_perm_cl(_g1h, &pss, rp); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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|
4691 |
|
4dfb2df418f2
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changeset
|
4692 OopClosure* scan_root_cl = &only_scan_root_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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|
4693 OopsInHeapRegionClosure* scan_perm_cl = &only_scan_perm_cl; |
| 342 | 4694 |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
4695 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
3979
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parents:
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changeset
|
4696 // We also need to mark copied objects. |
| 342 | 4697 scan_root_cl = &scan_mark_root_cl; |
| 4698 scan_perm_cl = &scan_mark_perm_cl; | |
| 4699 } | |
| 4700 | |
|
3983
811ec3d0833b
7097053: G1: assert(da ? referent->is_oop() : referent->is_oop_or_null()) failed: referenceProcessor.cpp:1054
johnc
parents:
3982
diff
changeset
|
4701 G1ParPushHeapRSClosure push_heap_rs_cl(_g1h, &pss); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
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|
4702 |
| 342 | 4703 pss.start_strong_roots(); |
| 4704 _g1h->g1_process_strong_roots(/* not collecting perm */ false, | |
| 4705 SharedHeap::SO_AllClasses, | |
| 4706 scan_root_cl, | |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
4707 &push_heap_rs_cl, |
| 342 | 4708 scan_perm_cl, |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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4711
diff
changeset
|
4709 worker_id); |
| 342 | 4710 pss.end_strong_roots(); |
|
3823
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|
4711 |
| 342 | 4712 { |
| 4713 double start = os::elapsedTime(); | |
| 4714 G1ParEvacuateFollowersClosure evac(_g1h, &pss, _queues, &_terminator); | |
| 4715 evac.do_void(); | |
| 4716 double elapsed_ms = (os::elapsedTime()-start)*1000.0; | |
| 4717 double term_ms = pss.term_time()*1000.0; | |
|
4728
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4711
diff
changeset
|
4718 _g1h->g1_policy()->record_obj_copy_time(worker_id, elapsed_ms-term_ms); |
|
441e946dc1af
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jmasa
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4711
diff
changeset
|
4719 _g1h->g1_policy()->record_termination(worker_id, term_ms, pss.term_attempts()); |
| 342 | 4720 } |
| 1282 | 4721 _g1h->g1_policy()->record_thread_age_table(pss.age_table()); |
| 342 | 4722 _g1h->update_surviving_young_words(pss.surviving_young_words()+1); |
| 4723 | |
| 4724 // Clean up any par-expanded rem sets. | |
| 4725 HeapRegionRemSet::par_cleanup(); | |
| 4726 | |
| 4727 if (ParallelGCVerbose) { | |
| 1709 | 4728 MutexLocker x(stats_lock()); |
|
4728
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7121618: Change type of number of GC workers to unsigned int.
jmasa
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4711
diff
changeset
|
4729 pss.print_termination_stats(worker_id); |
| 342 | 4730 } |
| 4731 | |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
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1861
diff
changeset
|
4732 assert(pss.refs()->is_empty(), "should be empty"); |
| 1611 | 4733 double end_time_ms = os::elapsedTime() * 1000.0; |
|
4728
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7121618: Change type of number of GC workers to unsigned int.
jmasa
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4711
diff
changeset
|
4734 _g1h->g1_policy()->record_gc_worker_end_time(worker_id, end_time_ms); |
| 342 | 4735 } |
| 4736 }; | |
| 4737 | |
| 4738 // *** Common G1 Evacuation Stuff | |
| 4739 | |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
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1755
diff
changeset
|
4740 // This method is run in a GC worker. |
|
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
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1755
diff
changeset
|
4741 |
| 342 | 4742 void |
| 4743 G1CollectedHeap:: | |
| 4744 g1_process_strong_roots(bool collecting_perm_gen, | |
| 4745 SharedHeap::ScanningOption so, | |
| 4746 OopClosure* scan_non_heap_roots, | |
| 4747 OopsInHeapRegionClosure* scan_rs, | |
| 4748 OopsInGenClosure* scan_perm, | |
| 4749 int worker_i) { | |
|
3979
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6484982: G1: process references during evacuation pauses
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diff
changeset
|
4750 |
| 342 | 4751 // First scan the strong roots, including the perm gen. |
| 4752 double ext_roots_start = os::elapsedTime(); | |
| 4753 double closure_app_time_sec = 0.0; | |
| 4754 | |
| 4755 BufferingOopClosure buf_scan_non_heap_roots(scan_non_heap_roots); | |
| 4756 BufferingOopsInGenClosure buf_scan_perm(scan_perm); | |
| 4757 buf_scan_perm.set_generation(perm_gen()); | |
| 4758 | |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
4759 // 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
|
4760 // unaligned oop locations. |
|
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
4761 CodeBlobToOopClosure eager_scan_code_roots(scan_non_heap_roots, /*do_marking=*/ true); |
|
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
4762 |
|
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
4763 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
|
4764 collecting_perm_gen, so, |
| 342 | 4765 &buf_scan_non_heap_roots, |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
4766 &eager_scan_code_roots, |
| 342 | 4767 &buf_scan_perm); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4768 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
4769 // Now the CM ref_processor roots. |
|
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
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3778
diff
changeset
|
4770 if (!_process_strong_tasks->is_task_claimed(G1H_PS_refProcessor_oops_do)) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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3973
diff
changeset
|
4771 // We need to treat the discovered reference lists of the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
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3973
diff
changeset
|
4772 // concurrent mark ref processor as roots and keep entries |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
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diff
changeset
|
4773 // (which are added by the marking threads) on them live |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
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|
4774 // until they can be processed at the end of marking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
4775 ref_processor_cm()->weak_oops_do(&buf_scan_non_heap_roots); |
|
3823
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diff
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|
4776 } |
|
14a2fd14c0db
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johnc
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3778
diff
changeset
|
4777 |
|
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
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3778
diff
changeset
|
4778 // Finish up any enqueued closure apps (attributed as object copy time). |
| 342 | 4779 buf_scan_non_heap_roots.done(); |
| 4780 buf_scan_perm.done(); | |
|
3823
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|
4781 |
| 342 | 4782 double ext_roots_end = os::elapsedTime(); |
|
3823
14a2fd14c0db
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diff
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|
4783 |
| 342 | 4784 g1_policy()->reset_obj_copy_time(worker_i); |
|
3823
14a2fd14c0db
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3778
diff
changeset
|
4785 double obj_copy_time_sec = buf_scan_perm.closure_app_seconds() + |
|
14a2fd14c0db
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3778
diff
changeset
|
4786 buf_scan_non_heap_roots.closure_app_seconds(); |
| 342 | 4787 g1_policy()->record_obj_copy_time(worker_i, obj_copy_time_sec * 1000.0); |
|
3823
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3778
diff
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|
4788 |
| 342 | 4789 double ext_root_time_ms = |
| 4790 ((ext_roots_end - ext_roots_start) - obj_copy_time_sec) * 1000.0; | |
|
3823
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diff
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|
4791 |
| 342 | 4792 g1_policy()->record_ext_root_scan_time(worker_i, ext_root_time_ms); |
| 4793 | |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4794 // 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
|
4795 // 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
|
4796 // as implicitly live). |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4797 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
|
4798 if (mark_in_progress()) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4799 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
|
4800 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
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4785
diff
changeset
|
4801 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4802 double satb_filtering_ms = (os::elapsedTime() - ext_roots_end) * 1000.0; |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
4785
diff
changeset
|
4803 g1_policy()->record_satb_filtering_time(worker_i, satb_filtering_ms); |
| 342 | 4804 |
| 4805 // Now scan the complement of the collection set. | |
| 4806 if (scan_rs != NULL) { | |
| 4807 g1_rem_set()->oops_into_collection_set_do(scan_rs, worker_i); | |
| 4808 } | |
|
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
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parents:
3778
diff
changeset
|
4809 |
| 342 | 4810 _process_strong_tasks->all_tasks_completed(); |
| 4811 } | |
| 4812 | |
| 4813 void | |
| 4814 G1CollectedHeap::g1_process_weak_roots(OopClosure* root_closure, | |
| 4815 OopClosure* non_root_closure) { | |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
4816 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
|
4817 SharedHeap::process_weak_roots(root_closure, &roots_in_blobs, non_root_closure); |
| 342 | 4818 } |
| 4819 | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
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|
4820 // Weak Reference Processing support |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
4821 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
4822 // An always "is_alive" closure that is used to preserve referents. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
4823 // If the object is non-null then it's alive. Used in the preservation |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
4824 // of referent objects that are pointed to by reference objects |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4825 // discovered by the CM ref processor. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
4826 class G1AlwaysAliveClosure: public BoolObjectClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
4827 G1CollectedHeap* _g1; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4828 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4829 G1AlwaysAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4830 void do_object(oop p) { assert(false, "Do not call."); } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4831 bool do_object_b(oop p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4832 if (p != NULL) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4833 return true; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4834 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
4835 return false; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4836 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
4837 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
4838 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
4839 bool G1STWIsAliveClosure::do_object_b(oop p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4840 // An object is reachable if it is outside the collection set, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4841 // or is inside and copied. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
4842 return !_g1->obj_in_cs(p) || p->is_forwarded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4843 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
4844 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4845 // Non Copying Keep Alive closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4846 class G1KeepAliveClosure: public OopClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4847 G1CollectedHeap* _g1; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4848 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4849 G1KeepAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4850 void do_oop(narrowOop* p) { guarantee(false, "Not needed"); } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4851 void do_oop( oop* p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4852 oop obj = *p; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4853 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4854 if (_g1->obj_in_cs(obj)) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4855 assert( obj->is_forwarded(), "invariant" ); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4856 *p = obj->forwardee(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4857 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4858 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4859 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4860 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4861 // Copying Keep Alive closure - can be called from both |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4862 // serial and parallel code as long as different worker |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4863 // threads utilize different G1ParScanThreadState instances |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4864 // and different queues. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4865 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4866 class G1CopyingKeepAliveClosure: public OopClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4867 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4868 OopClosure* _copy_non_heap_obj_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4869 OopsInHeapRegionClosure* _copy_perm_obj_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4870 G1ParScanThreadState* _par_scan_state; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4871 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4872 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4873 G1CopyingKeepAliveClosure(G1CollectedHeap* g1h, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4874 OopClosure* non_heap_obj_cl, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4875 OopsInHeapRegionClosure* perm_obj_cl, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4876 G1ParScanThreadState* pss): |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4877 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4878 _copy_non_heap_obj_cl(non_heap_obj_cl), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4879 _copy_perm_obj_cl(perm_obj_cl), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4880 _par_scan_state(pss) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4881 {} |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4882 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4883 virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4884 virtual void do_oop( oop* p) { do_oop_work(p); } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4885 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4886 template <class T> void do_oop_work(T* p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4887 oop obj = oopDesc::load_decode_heap_oop(p); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4888 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4889 if (_g1h->obj_in_cs(obj)) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4890 // If the referent object has been forwarded (either copied |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4891 // to a new location or to itself in the event of an |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4892 // evacuation failure) then we need to update the reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4893 // field and, if both reference and referent are in the G1 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4894 // heap, update the RSet for the referent. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4895 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4896 // If the referent has not been forwarded then we have to keep |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4897 // it alive by policy. Therefore we have copy the referent. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4898 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4899 // If the reference field is in the G1 heap then we can push |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4900 // on the PSS queue. When the queue is drained (after each |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4901 // phase of reference processing) the object and it's followers |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4902 // will be copied, the reference field set to point to the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4903 // new location, and the RSet updated. Otherwise we need to |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4904 // use the the non-heap or perm closures directly to copy |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4905 // the refernt object and update the pointer, while avoiding |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4906 // updating the RSet. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4907 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4908 if (_g1h->is_in_g1_reserved(p)) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4909 _par_scan_state->push_on_queue(p); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4910 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4911 // The reference field is not in the G1 heap. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4912 if (_g1h->perm_gen()->is_in(p)) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4913 _copy_perm_obj_cl->do_oop(p); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4914 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4915 _copy_non_heap_obj_cl->do_oop(p); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4916 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4917 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4918 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4919 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4920 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4921 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4922 // Serial drain queue closure. Called as the 'complete_gc' |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4923 // closure for each discovered list in some of the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4924 // reference processing phases. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4925 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4926 class G1STWDrainQueueClosure: public VoidClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4927 protected: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4928 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4929 G1ParScanThreadState* _par_scan_state; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4930 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4931 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4932 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4933 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4934 G1STWDrainQueueClosure(G1CollectedHeap* g1h, G1ParScanThreadState* pss) : |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4935 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4936 _par_scan_state(pss) |
|
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|
4937 { } |
|
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changeset
|
4938 |
|
4dfb2df418f2
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diff
changeset
|
4939 void do_void() { |
|
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diff
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|
4940 G1ParScanThreadState* const pss = par_scan_state(); |
|
4dfb2df418f2
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changeset
|
4941 pss->trim_queue(); |
|
4dfb2df418f2
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parents:
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|
4942 } |
|
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parents:
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|
4943 }; |
|
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|
4944 |
|
4dfb2df418f2
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diff
changeset
|
4945 // Parallel Reference Processing closures |
|
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|
4946 |
|
4dfb2df418f2
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diff
changeset
|
4947 // Implementation of AbstractRefProcTaskExecutor for parallel reference |
|
4dfb2df418f2
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changeset
|
4948 // processing during G1 evacuation pauses. |
|
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changeset
|
4949 |
|
4dfb2df418f2
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|
4950 class G1STWRefProcTaskExecutor: public AbstractRefProcTaskExecutor { |
|
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|
4951 private: |
|
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|
4952 G1CollectedHeap* _g1h; |
|
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|
4953 RefToScanQueueSet* _queues; |
|
4095
bca17e38de00
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|
4954 FlexibleWorkGang* _workers; |
|
3979
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|
4955 int _active_workers; |
|
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|
4956 |
|
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|
4957 public: |
|
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|
4958 G1STWRefProcTaskExecutor(G1CollectedHeap* g1h, |
|
4095
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|
4959 FlexibleWorkGang* workers, |
|
3979
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|
4960 RefToScanQueueSet *task_queues, |
|
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|
4961 int n_workers) : |
|
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diff
changeset
|
4962 _g1h(g1h), |
|
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changeset
|
4963 _queues(task_queues), |
|
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|
4964 _workers(workers), |
|
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|
4965 _active_workers(n_workers) |
|
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|
4966 { |
|
4dfb2df418f2
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|
4967 assert(n_workers > 0, "shouldn't call this otherwise"); |
|
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|
4968 } |
|
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|
4969 |
|
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|
4970 // Executes the given task using concurrent marking worker threads. |
|
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|
4971 virtual void execute(ProcessTask& task); |
|
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|
4972 virtual void execute(EnqueueTask& task); |
|
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|
4973 }; |
|
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changeset
|
4974 |
|
4dfb2df418f2
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diff
changeset
|
4975 // Gang task for possibly parallel reference processing |
|
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changeset
|
4976 |
|
4dfb2df418f2
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|
4977 class G1STWRefProcTaskProxy: public AbstractGangTask { |
|
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|
4978 typedef AbstractRefProcTaskExecutor::ProcessTask ProcessTask; |
|
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|
4979 ProcessTask& _proc_task; |
|
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|
4980 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
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|
4981 RefToScanQueueSet *_task_queues; |
|
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|
4982 ParallelTaskTerminator* _terminator; |
|
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changeset
|
4983 |
|
4dfb2df418f2
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diff
changeset
|
4984 public: |
|
4dfb2df418f2
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diff
changeset
|
4985 G1STWRefProcTaskProxy(ProcessTask& proc_task, |
|
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|
4986 G1CollectedHeap* g1h, |
|
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|
4987 RefToScanQueueSet *task_queues, |
|
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|
4988 ParallelTaskTerminator* terminator) : |
|
4dfb2df418f2
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|
4989 AbstractGangTask("Process reference objects in parallel"), |
|
4dfb2df418f2
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diff
changeset
|
4990 _proc_task(proc_task), |
|
4dfb2df418f2
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parents:
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diff
changeset
|
4991 _g1h(g1h), |
|
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parents:
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diff
changeset
|
4992 _task_queues(task_queues), |
|
4dfb2df418f2
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diff
changeset
|
4993 _terminator(terminator) |
|
4dfb2df418f2
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parents:
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diff
changeset
|
4994 {} |
|
4dfb2df418f2
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diff
changeset
|
4995 |
|
4728
441e946dc1af
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parents:
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diff
changeset
|
4996 virtual void work(uint worker_id) { |
|
3979
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|
4997 // The reference processing task executed by a single worker. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
4998 ResourceMark rm; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
4999 HandleMark hm; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5000 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5001 G1STWIsAliveClosure is_alive(_g1h); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5002 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5003 G1ParScanThreadState pss(_g1h, worker_id); |
|
3979
4dfb2df418f2
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diff
changeset
|
5004 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5005 G1ParScanHeapEvacClosure scan_evac_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5006 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
|
5007 G1ParScanPartialArrayClosure partial_scan_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5008 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5009 pss.set_evac_closure(&scan_evac_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5010 pss.set_evac_failure_closure(&evac_failure_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5011 pss.set_partial_scan_closure(&partial_scan_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5012 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5013 G1ParScanExtRootClosure only_copy_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
|
5014 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
|
5015 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5016 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
|
5017 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
|
5018 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5019 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5020 OopsInHeapRegionClosure* copy_perm_cl = &only_copy_perm_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5021 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5022 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5023 // We also need to mark copied objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5024 copy_non_heap_cl = ©_mark_non_heap_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5025 copy_perm_cl = ©_mark_perm_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5026 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5027 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5028 // Keep alive closure. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5029 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, copy_perm_cl, &pss); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5030 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5031 // Complete GC closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5032 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _task_queues, _terminator); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5033 |
|
4dfb2df418f2
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diff
changeset
|
5034 // Call the reference processing task's work routine. |
|
4728
441e946dc1af
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jmasa
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4711
diff
changeset
|
5035 _proc_task.work(worker_id, is_alive, keep_alive, drain_queue); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5036 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5037 // Note we cannot assert that the refs array is empty here as not all |
|
4dfb2df418f2
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diff
changeset
|
5038 // of the processing tasks (specifically phase2 - pp2_work) execute |
|
4dfb2df418f2
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diff
changeset
|
5039 // the complete_gc closure (which ordinarily would drain the queue) so |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5040 // the queue may not be empty. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5041 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
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diff
changeset
|
5042 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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3973
diff
changeset
|
5043 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5044 // Driver routine for parallel reference processing. |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5045 // Creates an instance of the ref processing gang |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5046 // task and has the worker threads execute it. |
|
4dfb2df418f2
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diff
changeset
|
5047 void G1STWRefProcTaskExecutor::execute(ProcessTask& proc_task) { |
|
4dfb2df418f2
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diff
changeset
|
5048 assert(_workers != NULL, "Need parallel worker threads."); |
|
4dfb2df418f2
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diff
changeset
|
5049 |
|
4dfb2df418f2
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diff
changeset
|
5050 ParallelTaskTerminator terminator(_active_workers, _queues); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5051 G1STWRefProcTaskProxy proc_task_proxy(proc_task, _g1h, _queues, &terminator); |
|
4dfb2df418f2
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changeset
|
5052 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5053 _g1h->set_par_threads(_active_workers); |
|
4dfb2df418f2
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diff
changeset
|
5054 _workers->run_task(&proc_task_proxy); |
|
4dfb2df418f2
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diff
changeset
|
5055 _g1h->set_par_threads(0); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5056 } |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5057 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5058 // Gang task for parallel reference enqueueing. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5059 |
|
4dfb2df418f2
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diff
changeset
|
5060 class G1STWRefEnqueueTaskProxy: public AbstractGangTask { |
|
4dfb2df418f2
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diff
changeset
|
5061 typedef AbstractRefProcTaskExecutor::EnqueueTask EnqueueTask; |
|
4dfb2df418f2
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|
5062 EnqueueTask& _enq_task; |
|
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|
5063 |
|
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changeset
|
5064 public: |
|
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|
5065 G1STWRefEnqueueTaskProxy(EnqueueTask& enq_task) : |
|
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|
5066 AbstractGangTask("Enqueue reference objects in parallel"), |
|
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|
5067 _enq_task(enq_task) |
|
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|
5068 { } |
|
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|
5069 |
|
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|
5070 virtual void work(uint worker_id) { |
|
441e946dc1af
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|
5071 _enq_task.work(worker_id); |
|
3979
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|
5072 } |
|
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|
5073 }; |
|
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changeset
|
5074 |
|
4dfb2df418f2
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changeset
|
5075 // Driver routine for parallel reference enqueing. |
|
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changeset
|
5076 // Creates an instance of the ref enqueueing gang |
|
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|
5077 // task and has the worker threads execute it. |
|
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changeset
|
5078 |
|
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|
5079 void G1STWRefProcTaskExecutor::execute(EnqueueTask& enq_task) { |
|
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|
5080 assert(_workers != NULL, "Need parallel worker threads."); |
|
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|
5081 |
|
4dfb2df418f2
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changeset
|
5082 G1STWRefEnqueueTaskProxy enq_task_proxy(enq_task); |
|
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changeset
|
5083 |
|
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changeset
|
5084 _g1h->set_par_threads(_active_workers); |
|
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|
5085 _workers->run_task(&enq_task_proxy); |
|
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|
5086 _g1h->set_par_threads(0); |
|
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|
5087 } |
|
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parents:
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changeset
|
5088 |
|
4dfb2df418f2
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changeset
|
5089 // End of weak reference support closures |
|
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changeset
|
5090 |
|
4dfb2df418f2
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|
5091 // Abstract task used to preserve (i.e. copy) any referent objects |
|
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|
5092 // that are in the collection set and are pointed to by reference |
|
4dfb2df418f2
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|
5093 // objects discovered by the CM ref processor. |
|
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changeset
|
5094 |
|
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|
5095 class G1ParPreserveCMReferentsTask: public AbstractGangTask { |
|
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|
5096 protected: |
|
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|
5097 G1CollectedHeap* _g1h; |
|
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|
5098 RefToScanQueueSet *_queues; |
|
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|
5099 ParallelTaskTerminator _terminator; |
|
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|
5100 uint _n_workers; |
|
3979
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|
5101 |
|
4dfb2df418f2
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|
5102 public: |
|
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|
5103 G1ParPreserveCMReferentsTask(G1CollectedHeap* g1h,int workers, RefToScanQueueSet *task_queues) : |
|
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changeset
|
5104 AbstractGangTask("ParPreserveCMReferents"), |
|
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|
5105 _g1h(g1h), |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5106 _queues(task_queues), |
|
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|
5107 _terminator(workers, _queues), |
|
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changeset
|
5108 _n_workers(workers) |
|
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changeset
|
5109 { } |
|
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|
5110 |
|
4728
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|
5111 void work(uint worker_id) { |
|
3979
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|
5112 ResourceMark rm; |
|
4dfb2df418f2
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diff
changeset
|
5113 HandleMark hm; |
|
4dfb2df418f2
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changeset
|
5114 |
|
4728
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|
5115 G1ParScanThreadState pss(_g1h, worker_id); |
|
3979
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|
5116 G1ParScanHeapEvacClosure scan_evac_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
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|
5117 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
|
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|
5118 G1ParScanPartialArrayClosure partial_scan_cl(_g1h, &pss, NULL); |
|
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changeset
|
5119 |
|
4dfb2df418f2
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diff
changeset
|
5120 pss.set_evac_closure(&scan_evac_cl); |
|
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|
5121 pss.set_evac_failure_closure(&evac_failure_cl); |
|
4dfb2df418f2
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changeset
|
5122 pss.set_partial_scan_closure(&partial_scan_cl); |
|
4dfb2df418f2
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changeset
|
5123 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5124 assert(pss.refs()->is_empty(), "both queue and overflow should be empty"); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5125 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5126 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5127 G1ParScanExtRootClosure only_copy_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
|
5128 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
|
5129 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5130 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
|
5131 G1ParScanAndMarkPermClosure copy_mark_perm_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5132 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5133 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5134 OopsInHeapRegionClosure* copy_perm_cl = &only_copy_perm_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5135 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5136 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5137 // We also need to mark copied objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5138 copy_non_heap_cl = ©_mark_non_heap_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5139 copy_perm_cl = ©_mark_perm_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5140 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5141 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5142 // Is alive closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5143 G1AlwaysAliveClosure always_alive(_g1h); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5144 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5145 // Copying keep alive closure. Applied to referent objects that need |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5146 // to be copied. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5147 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, copy_perm_cl, &pss); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5148 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5149 ReferenceProcessor* rp = _g1h->ref_processor_cm(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5150 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5151 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
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diff
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|
5152 uint stride = MIN2(MAX2(_n_workers, 1U), limit); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5153 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5154 // limit is set using max_num_q() - which was set using ParallelGCThreads. |
|
4dfb2df418f2
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diff
changeset
|
5155 // So this must be true - but assert just in case someone decides to |
|
4dfb2df418f2
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diff
changeset
|
5156 // change the worker ids. |
|
4728
441e946dc1af
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jmasa
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diff
changeset
|
5157 assert(0 <= worker_id && worker_id < limit, "sanity"); |
|
3979
4dfb2df418f2
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parents:
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diff
changeset
|
5158 assert(!rp->discovery_is_atomic(), "check this code"); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5159 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5160 // 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
|
5161 for (uint idx = worker_id; idx < limit; idx += stride) { |
|
4014
bf2d2b8b1726
7095243: Disambiguate ReferenceProcessor::_discoveredSoftRefs
johnc
parents:
4013
diff
changeset
|
5162 DiscoveredList& ref_list = rp->discovered_refs()[idx]; |
|
3979
4dfb2df418f2
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parents:
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diff
changeset
|
5163 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5164 DiscoveredListIterator iter(ref_list, &keep_alive, &always_alive); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5165 while (iter.has_next()) { |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5166 // Since discovery is not atomic for the CM ref processor, we |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5167 // can see some null referent objects. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5168 iter.load_ptrs(DEBUG_ONLY(true)); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5169 oop ref = iter.obj(); |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5170 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5171 // This will filter nulls. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5172 if (iter.is_referent_alive()) { |
|
4dfb2df418f2
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diff
changeset
|
5173 iter.make_referent_alive(); |
|
4dfb2df418f2
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diff
changeset
|
5174 } |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5175 iter.move_to_next(); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5176 } |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5177 } |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5178 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5179 // Drain the queue - which may cause stealing |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5180 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _queues, &_terminator); |
|
4dfb2df418f2
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diff
changeset
|
5181 drain_queue.do_void(); |
|
4dfb2df418f2
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diff
changeset
|
5182 // Allocation buffers were retired at the end of G1ParEvacuateFollowersClosure |
|
4dfb2df418f2
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diff
changeset
|
5183 assert(pss.refs()->is_empty(), "should be"); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5184 } |
|
4dfb2df418f2
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diff
changeset
|
5185 }; |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5186 |
|
4dfb2df418f2
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changeset
|
5187 // Weak Reference processing during an evacuation pause (part 1). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5188 void G1CollectedHeap::process_discovered_references() { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5189 double ref_proc_start = os::elapsedTime(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5190 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5191 ReferenceProcessor* rp = _ref_processor_stw; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5192 assert(rp->discovery_enabled(), "should have been enabled"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5193 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5194 // Any reference objects, in the collection set, that were 'discovered' |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5195 // by the CM ref processor should have already been copied (either by |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5196 // applying the external root copy closure to the discovered lists, or |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5197 // by following an RSet entry). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5198 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5199 // But some of the referents, that are in the collection set, that these |
|
4dfb2df418f2
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diff
changeset
|
5200 // reference objects point to may not have been copied: the STW ref |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5201 // processor would have seen that the reference object had already |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5202 // been 'discovered' and would have skipped discovering the reference, |
|
4dfb2df418f2
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diff
changeset
|
5203 // but would not have treated the reference object as a regular oop. |
|
4dfb2df418f2
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diff
changeset
|
5204 // As a reult the copy closure would not have been applied to the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5205 // referent object. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5206 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5207 // We need to explicitly copy these referent objects - the references |
|
4dfb2df418f2
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diff
changeset
|
5208 // will be processed at the end of remarking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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changeset
|
5209 // |
|
4dfb2df418f2
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changeset
|
5210 // We also need to do this copying before we process the reference |
|
4dfb2df418f2
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changeset
|
5211 // objects discovered by the STW ref processor in case one of these |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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changeset
|
5212 // referents points to another object which is also referenced by an |
|
4dfb2df418f2
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changeset
|
5213 // object discovered by the STW ref processor. |
|
4dfb2df418f2
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diff
changeset
|
5214 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5215 uint active_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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parents:
4090
diff
changeset
|
5216 workers()->active_workers() : 1); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5217 |
| 4711 | 5218 assert(!G1CollectedHeap::use_parallel_gc_threads() || |
| 5219 active_workers == workers()->active_workers(), | |
| 5220 "Need to reset active_workers"); | |
| 5221 | |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
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diff
changeset
|
5222 set_par_threads(active_workers); |
|
bca17e38de00
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parents:
4090
diff
changeset
|
5223 G1ParPreserveCMReferentsTask keep_cm_referents(this, active_workers, _task_queues); |
|
3979
4dfb2df418f2
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parents:
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diff
changeset
|
5224 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5225 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5226 workers()->run_task(&keep_cm_referents); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5227 } else { |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5228 keep_cm_referents.work(0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5229 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5230 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5231 set_par_threads(0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5232 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5233 // Closure to test whether a referent is alive. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5234 G1STWIsAliveClosure is_alive(this); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5235 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5236 // Even when parallel reference processing is enabled, the processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5237 // 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
|
5238 // 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
|
5239 // JNI refs. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5240 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5241 // Use only a single queue for this PSS. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5242 G1ParScanThreadState pss(this, 0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5243 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5244 // We do not embed a reference processor in the copying/scanning |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5245 // closures while we're actually processing the discovered |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5246 // reference objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5247 G1ParScanHeapEvacClosure scan_evac_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5248 G1ParScanHeapEvacFailureClosure evac_failure_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5249 G1ParScanPartialArrayClosure partial_scan_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5250 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5251 pss.set_evac_closure(&scan_evac_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5252 pss.set_evac_failure_closure(&evac_failure_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5253 pss.set_partial_scan_closure(&partial_scan_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5254 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5255 assert(pss.refs()->is_empty(), "pre-condition"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5256 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5257 G1ParScanExtRootClosure only_copy_non_heap_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5258 G1ParScanPermClosure only_copy_perm_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5259 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5260 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5261 G1ParScanAndMarkPermClosure copy_mark_perm_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5262 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5263 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5264 OopsInHeapRegionClosure* copy_perm_cl = &only_copy_perm_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5265 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5266 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5267 // We also need to mark copied objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5268 copy_non_heap_cl = ©_mark_non_heap_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5269 copy_perm_cl = ©_mark_perm_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5270 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5271 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5272 // Keep alive closure. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5273 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
|
5274 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5275 // Serial Complete GC closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5276 G1STWDrainQueueClosure drain_queue(this, &pss); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5277 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5278 // Setup the soft refs policy... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5279 rp->setup_policy(false); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5280 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5281 if (!rp->processing_is_mt()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5282 // Serial reference processing... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5283 rp->process_discovered_references(&is_alive, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5284 &keep_alive, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5285 &drain_queue, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5286 NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5287 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5288 // Parallel reference processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5289 assert(rp->num_q() == active_workers, "sanity"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5290 assert(active_workers <= rp->max_num_q(), "sanity"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5291 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5292 G1STWRefProcTaskExecutor par_task_executor(this, workers(), _task_queues, active_workers); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5293 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
|
5294 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5295 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5296 // We have completed copying any necessary live referent objects |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5297 // (that were not copied during the actual pause) so we can |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5298 // retire any active alloc buffers |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5299 pss.retire_alloc_buffers(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5300 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
|
5301 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5302 double ref_proc_time = os::elapsedTime() - ref_proc_start; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5303 g1_policy()->record_ref_proc_time(ref_proc_time * 1000.0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5304 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5305 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5306 // Weak Reference processing during an evacuation pause (part 2). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5307 void G1CollectedHeap::enqueue_discovered_references() { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5308 double ref_enq_start = os::elapsedTime(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5309 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5310 ReferenceProcessor* rp = _ref_processor_stw; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5311 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
|
5312 |
|
4dfb2df418f2
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|
5313 // Now enqueue any remaining on the discovered lists on to |
|
4dfb2df418f2
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diff
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|
5314 // the pending list. |
|
4dfb2df418f2
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diff
changeset
|
5315 if (!rp->processing_is_mt()) { |
|
4dfb2df418f2
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johnc
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diff
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|
5316 // Serial reference processing... |
|
4dfb2df418f2
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changeset
|
5317 rp->enqueue_discovered_references(); |
|
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6484982: G1: process references during evacuation pauses
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|
5318 } else { |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5319 // Parallel reference enqueuing |
|
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parents:
3973
diff
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|
5320 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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4711
diff
changeset
|
5321 uint active_workers = (ParallelGCThreads > 0 ? workers()->active_workers() : 1); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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parents:
4090
diff
changeset
|
5322 assert(active_workers == workers()->active_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5323 "Need to reset active_workers"); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
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|
5324 assert(rp->num_q() == active_workers, "sanity"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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|
5325 assert(active_workers <= rp->max_num_q(), "sanity"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5326 |
|
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
5327 G1STWRefProcTaskExecutor par_task_executor(this, workers(), _task_queues, active_workers); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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changeset
|
5328 rp->enqueue_discovered_references(&par_task_executor); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5329 } |
|
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
5330 |
|
4dfb2df418f2
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diff
changeset
|
5331 rp->verify_no_references_recorded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5332 assert(!rp->discovery_enabled(), "should have been disabled"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5333 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5334 // FIXME |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5335 // CM's reference processing also cleans up the string and symbol tables. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5336 // Should we do that here also? We could, but it is a serial operation |
|
4dfb2df418f2
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parents:
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diff
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|
5337 // and could signicantly increase the pause time. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5338 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5339 double ref_enq_time = os::elapsedTime() - ref_enq_start; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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changeset
|
5340 g1_policy()->record_ref_enq_time(ref_enq_time * 1000.0); |
|
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johnc
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|
5341 } |
|
4dfb2df418f2
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|
5342 |
| 342 | 5343 void G1CollectedHeap::evacuate_collection_set() { |
|
4781
bacb651cf5bf
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
4728
diff
changeset
|
5344 _expand_heap_after_alloc_failure = true; |
| 342 | 5345 set_evacuation_failed(false); |
| 5346 | |
| 5347 g1_rem_set()->prepare_for_oops_into_collection_set_do(); | |
| 5348 concurrent_g1_refine()->set_use_cache(false); | |
| 889 | 5349 concurrent_g1_refine()->clear_hot_cache_claimed_index(); |
| 5350 | |
|
4728
441e946dc1af
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jmasa
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4711
diff
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|
5351 uint n_workers; |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
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|
5352 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
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|
5353 n_workers = |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
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|
5354 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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4090
diff
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|
5355 workers()->active_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5356 Threads::number_of_non_daemon_threads()); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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4090
diff
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|
5357 assert(UseDynamicNumberOfGCThreads || |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5358 n_workers == workers()->total_workers(), |
|
bca17e38de00
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jmasa
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4090
diff
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|
5359 "If not dynamic should be using all the workers"); |
| 4711 | 5360 workers()->set_active_workers(n_workers); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
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|
5361 set_par_threads(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
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|
5362 } else { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5363 assert(n_par_threads() == 0, |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5364 "Should be the original non-parallel value"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
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|
5365 n_workers = 1; |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
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|
5366 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5367 |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5368 G1ParTask g1_par_task(this, _task_queues); |
| 342 | 5369 |
| 5370 init_for_evac_failure(NULL); | |
| 5371 | |
| 5372 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
|
5373 |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
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parents:
595
diff
changeset
|
5374 assert(dirty_card_queue_set().completed_buffers_num() == 0, "Should be empty"); |
| 342 | 5375 double start_par = os::elapsedTime(); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5376 |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
5377 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 342 | 5378 // The individual threads will set their evac-failure closures. |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5379 StrongRootsScope srs(this); |
| 1709 | 5380 if (ParallelGCVerbose) G1ParScanThreadState::print_termination_stats_hdr(); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5381 // These tasks use ShareHeap::_process_strong_tasks |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5382 assert(UseDynamicNumberOfGCThreads || |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5383 workers()->active_workers() == workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5384 "If not dynamic should be using all the workers"); |
| 342 | 5385 workers()->run_task(&g1_par_task); |
| 5386 } else { | |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5387 StrongRootsScope srs(this); |
| 4711 | 5388 g1_par_task.set_for_termination(n_workers); |
| 342 | 5389 g1_par_task.work(0); |
| 5390 } | |
| 5391 | |
| 5392 double par_time = (os::elapsedTime() - start_par) * 1000.0; | |
| 5393 g1_policy()->record_par_time(par_time); | |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5394 |
| 342 | 5395 set_par_threads(0); |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5396 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5397 // Process any discovered reference objects - we have |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5398 // to do this _before_ we retire the GC alloc regions |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5399 // as we may have to copy some 'reachable' referent |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5400 // objects (and their reachable sub-graphs) that were |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5401 // not copied during the pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5402 process_discovered_references(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5403 |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5404 // Weak root processing. |
|
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5405 // 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
|
5406 // 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
|
5407 // here too. |
| 342 | 5408 { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5409 G1STWIsAliveClosure is_alive(this); |
| 342 | 5410 G1KeepAliveClosure keep_alive(this); |
| 5411 JNIHandles::weak_oops_do(&is_alive, &keep_alive); | |
| 5412 } | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5413 |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
5414 release_gc_alloc_regions(); |
| 342 | 5415 g1_rem_set()->cleanup_after_oops_into_collection_set_do(); |
|
616
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6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5416 |
| 889 | 5417 concurrent_g1_refine()->clear_hot_cache(); |
| 342 | 5418 concurrent_g1_refine()->set_use_cache(true); |
| 5419 | |
| 5420 finalize_for_evac_failure(); | |
| 5421 | |
| 5422 if (evacuation_failed()) { | |
| 5423 remove_self_forwarding_pointers(); | |
| 5424 if (PrintGCDetails) { | |
|
1719
b63010841f78
6975964: G1: print out a more descriptive message for evacuation failure when +PrintGCDetails is set
tonyp
parents:
1718
diff
changeset
|
5425 gclog_or_tty->print(" (to-space overflow)"); |
| 342 | 5426 } else if (PrintGC) { |
| 5427 gclog_or_tty->print("--"); | |
| 5428 } | |
| 5429 } | |
| 5430 | |
|
3979
4dfb2df418f2
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parents:
3973
diff
changeset
|
5431 // Enqueue any remaining references remaining on the STW |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5432 // reference processor's discovered lists. We need to do |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5433 // this after the card table is cleaned (and verified) as |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5434 // the act of enqueuing entries on to the pending list |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5435 // will log these updates (and dirty their associated |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5436 // cards). We need these updates logged to update any |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5437 // RSets. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5438 enqueue_discovered_references(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5439 |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5440 if (G1DeferredRSUpdate) { |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5441 RedirtyLoggedCardTableEntryFastClosure redirty; |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5442 dirty_card_queue_set().set_closure(&redirty); |
|
4f360ec815ba
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iveresov
parents:
595
diff
changeset
|
5443 dirty_card_queue_set().apply_closure_to_all_completed_buffers(); |
| 1111 | 5444 |
| 5445 DirtyCardQueueSet& dcq = JavaThread::dirty_card_queue_set(); | |
| 5446 dcq.merge_bufferlists(&dirty_card_queue_set()); | |
|
616
4f360ec815ba
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iveresov
parents:
595
diff
changeset
|
5447 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
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595
diff
changeset
|
5448 } |
| 342 | 5449 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
| 5450 } | |
| 5451 | |
| 2173 | 5452 void G1CollectedHeap::free_region_if_empty(HeapRegion* hr, |
| 2152 | 5453 size_t* pre_used, |
| 5454 FreeRegionList* free_list, | |
| 4072 | 5455 OldRegionSet* old_proxy_set, |
| 2152 | 5456 HumongousRegionSet* humongous_proxy_set, |
| 2173 | 5457 HRRSCleanupTask* hrrs_cleanup_task, |
| 2152 | 5458 bool par) { |
| 5459 if (hr->used() > 0 && hr->max_live_bytes() == 0 && !hr->is_young()) { | |
| 5460 if (hr->isHumongous()) { | |
| 5461 assert(hr->startsHumongous(), "we should only see starts humongous"); | |
| 5462 free_humongous_region(hr, pre_used, free_list, humongous_proxy_set, par); | |
| 5463 } else { | |
| 4072 | 5464 _old_set.remove_with_proxy(hr, old_proxy_set); |
| 2152 | 5465 free_region(hr, pre_used, free_list, par); |
| 342 | 5466 } |
| 2173 | 5467 } else { |
| 5468 hr->rem_set()->do_cleanup_work(hrrs_cleanup_task); | |
| 342 | 5469 } |
| 5470 } | |
| 5471 | |
| 2152 | 5472 void G1CollectedHeap::free_region(HeapRegion* hr, |
| 5473 size_t* pre_used, | |
| 5474 FreeRegionList* free_list, | |
| 5475 bool par) { | |
| 5476 assert(!hr->isHumongous(), "this is only for non-humongous regions"); | |
| 5477 assert(!hr->is_empty(), "the region should not be empty"); | |
| 5478 assert(free_list != NULL, "pre-condition"); | |
| 5479 | |
| 5480 *pre_used += hr->used(); | |
| 5481 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
|
5482 free_list->add_as_head(hr); |
| 2152 | 5483 } |
| 5484 | |
| 5485 void G1CollectedHeap::free_humongous_region(HeapRegion* hr, | |
| 5486 size_t* pre_used, | |
| 5487 FreeRegionList* free_list, | |
| 5488 HumongousRegionSet* humongous_proxy_set, | |
| 5489 bool par) { | |
| 5490 assert(hr->startsHumongous(), "this is only for starts humongous regions"); | |
| 5491 assert(free_list != NULL, "pre-condition"); | |
| 5492 assert(humongous_proxy_set != NULL, "pre-condition"); | |
| 5493 | |
| 5494 size_t hr_used = hr->used(); | |
| 5495 size_t hr_capacity = hr->capacity(); | |
| 5496 size_t hr_pre_used = 0; | |
| 5497 _humongous_set.remove_with_proxy(hr, humongous_proxy_set); | |
| 5498 hr->set_notHumongous(); | |
| 5499 free_region(hr, &hr_pre_used, free_list, par); | |
| 5500 | |
| 3766 | 5501 size_t i = hr->hrs_index() + 1; |
| 2152 | 5502 size_t num = 1; |
| 3766 | 5503 while (i < n_regions()) { |
| 5504 HeapRegion* curr_hr = region_at(i); | |
| 2152 | 5505 if (!curr_hr->continuesHumongous()) { |
| 5506 break; | |
| 5507 } | |
| 5508 curr_hr->set_notHumongous(); | |
| 5509 free_region(curr_hr, &hr_pre_used, free_list, par); | |
| 5510 num += 1; | |
| 5511 i += 1; | |
| 5512 } | |
| 5513 assert(hr_pre_used == hr_used, | |
| 5514 err_msg("hr_pre_used: "SIZE_FORMAT" and hr_used: "SIZE_FORMAT" " | |
| 5515 "should be the same", hr_pre_used, hr_used)); | |
| 5516 *pre_used += hr_pre_used; | |
| 5517 } | |
| 5518 | |
| 5519 void G1CollectedHeap::update_sets_after_freeing_regions(size_t pre_used, | |
| 5520 FreeRegionList* free_list, | |
| 4072 | 5521 OldRegionSet* old_proxy_set, |
| 2152 | 5522 HumongousRegionSet* humongous_proxy_set, |
| 5523 bool par) { | |
| 5524 if (pre_used > 0) { | |
| 5525 Mutex* lock = (par) ? ParGCRareEvent_lock : NULL; | |
| 342 | 5526 MutexLockerEx x(lock, Mutex::_no_safepoint_check_flag); |
| 2152 | 5527 assert(_summary_bytes_used >= pre_used, |
| 5528 err_msg("invariant: _summary_bytes_used: "SIZE_FORMAT" " | |
| 5529 "should be >= pre_used: "SIZE_FORMAT, | |
| 5530 _summary_bytes_used, pre_used)); | |
| 342 | 5531 _summary_bytes_used -= pre_used; |
| 2152 | 5532 } |
| 5533 if (free_list != NULL && !free_list->is_empty()) { | |
| 5534 MutexLockerEx x(FreeList_lock, Mutex::_no_safepoint_check_flag); | |
|
2432
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7029458: G1: Add newly-reclaimed regions to the beginning of the region free list, not the end
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|
5535 _free_list.add_as_head(free_list); |
| 2152 | 5536 } |
| 4072 | 5537 if (old_proxy_set != NULL && !old_proxy_set->is_empty()) { |
| 5538 MutexLockerEx x(OldSets_lock, Mutex::_no_safepoint_check_flag); | |
| 5539 _old_set.update_from_proxy(old_proxy_set); | |
| 5540 } | |
| 2152 | 5541 if (humongous_proxy_set != NULL && !humongous_proxy_set->is_empty()) { |
| 5542 MutexLockerEx x(OldSets_lock, Mutex::_no_safepoint_check_flag); | |
| 5543 _humongous_set.update_from_proxy(humongous_proxy_set); | |
| 342 | 5544 } |
| 5545 } | |
| 5546 | |
|
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|
5547 class G1ParCleanupCTTask : public AbstractGangTask { |
|
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|
5548 CardTableModRefBS* _ct_bs; |
|
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|
5549 G1CollectedHeap* _g1h; |
|
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|
5550 HeapRegion* volatile _su_head; |
|
796
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|
5551 public: |
|
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|
5552 G1ParCleanupCTTask(CardTableModRefBS* ct_bs, |
|
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7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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|
5553 G1CollectedHeap* g1h) : |
|
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|
5554 AbstractGangTask("G1 Par Cleanup CT Task"), |
|
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|
5555 _ct_bs(ct_bs), _g1h(g1h) { } |
|
796
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|
5556 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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|
5557 void work(uint worker_id) { |
|
796
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|
5558 HeapRegion* r; |
|
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|
5559 while (r = _g1h->pop_dirty_cards_region()) { |
|
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|
5560 clear_cards(r); |
|
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|
5561 } |
|
940
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|
5562 } |
|
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|
5563 |
|
796
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|
5564 void clear_cards(HeapRegion* r) { |
|
3830
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|
5565 // Cards of the survivors should have already been dirtied. |
|
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|
5566 if (!r->is_survivor()) { |
|
796
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|
5567 _ct_bs->clear(MemRegion(r->bottom(), r->end())); |
|
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|
5568 } |
|
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|
5569 } |
|
29e7d79232b9
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|
5570 }; |
|
29e7d79232b9
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|
5571 |
|
940
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|
5572 #ifndef PRODUCT |
|
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|
5573 class G1VerifyCardTableCleanup: public HeapRegionClosure { |
|
3317
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|
5574 G1CollectedHeap* _g1h; |
|
940
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|
5575 CardTableModRefBS* _ct_bs; |
|
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|
5576 public: |
|
3317
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|
5577 G1VerifyCardTableCleanup(G1CollectedHeap* g1h, CardTableModRefBS* ct_bs) |
|
063382f9b575
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|
5578 : _g1h(g1h), _ct_bs(ct_bs) { } |
|
2433
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|
5579 virtual bool doHeapRegion(HeapRegion* r) { |
|
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|
5580 if (r->is_survivor()) { |
|
3317
063382f9b575
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|
5581 _g1h->verify_dirty_region(r); |
|
940
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|
5582 } else { |
|
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|
5583 _g1h->verify_not_dirty_region(r); |
|
940
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|
5584 } |
|
8624da129f0b
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|
5585 return false; |
|
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apetrusenko
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936
diff
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|
5586 } |
|
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|
5587 }; |
|
2433
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|
5588 |
|
3317
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|
5589 void G1CollectedHeap::verify_not_dirty_region(HeapRegion* hr) { |
|
063382f9b575
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|
5590 // All of the region should be clean. |
|
063382f9b575
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changeset
|
5591 CardTableModRefBS* ct_bs = (CardTableModRefBS*)barrier_set(); |
|
063382f9b575
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changeset
|
5592 MemRegion mr(hr->bottom(), hr->end()); |
|
063382f9b575
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changeset
|
5593 ct_bs->verify_not_dirty_region(mr); |
|
063382f9b575
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|
5594 } |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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changeset
|
5595 |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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diff
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|
5596 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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changeset
|
5597 // We cannot guarantee that [bottom(),end()] is dirty. Threads |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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diff
changeset
|
5598 // dirty allocated blocks as they allocate them. The thread that |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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changeset
|
5599 // retires each region and replaces it with a new one will do a |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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diff
changeset
|
5600 // maximal allocation to fill in [pre_dummy_top(),end()] but will |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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changeset
|
5601 // 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...)
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3293
diff
changeset
|
5602 // a lock). So we can only verify that [bottom(),pre_dummy_top()] |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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diff
changeset
|
5603 // is dirty. |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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3293
diff
changeset
|
5604 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
|
5605 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...)
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diff
changeset
|
5606 ct_bs->verify_dirty_region(mr); |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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diff
changeset
|
5607 } |
|
063382f9b575
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diff
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|
5608 |
|
2433
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|
5609 void G1CollectedHeap::verify_dirty_young_list(HeapRegion* head) { |
|
3317
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|
5610 CardTableModRefBS* ct_bs = (CardTableModRefBS*) barrier_set(); |
|
2433
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diff
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|
5611 for (HeapRegion* hr = head; hr != NULL; hr = hr->get_next_young_region()) { |
|
3317
063382f9b575
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diff
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|
5612 verify_dirty_region(hr); |
|
2433
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7023069: G1: Introduce symmetric locking in the slow allocation path
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2432
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|
5613 } |
|
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2432
diff
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|
5614 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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2432
diff
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|
5615 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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diff
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|
5616 void G1CollectedHeap::verify_dirty_young_regions() { |
|
abdfc822206f
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parents:
2432
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|
5617 verify_dirty_young_list(_young_list->first_region()); |
|
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|
5618 verify_dirty_young_list(_young_list->first_survivor_region()); |
|
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|
5619 } |
|
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|
5620 #endif |
|
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|
5621 |
| 342 | 5622 void G1CollectedHeap::cleanUpCardTable() { |
| 5623 CardTableModRefBS* ct_bs = (CardTableModRefBS*) (barrier_set()); | |
| 5624 double start = os::elapsedTime(); | |
| 5625 | |
| 4023 | 5626 { |
| 5627 // Iterate over the dirty cards region list. | |
| 5628 G1ParCleanupCTTask cleanup_task(ct_bs, this); | |
| 5629 | |
| 4711 | 5630 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 5631 set_par_threads(); | |
| 4023 | 5632 workers()->run_task(&cleanup_task); |
| 5633 set_par_threads(0); | |
| 5634 } else { | |
| 5635 while (_dirty_cards_region_list) { | |
| 5636 HeapRegion* r = _dirty_cards_region_list; | |
| 5637 cleanup_task.clear_cards(r); | |
| 5638 _dirty_cards_region_list = r->get_next_dirty_cards_region(); | |
| 5639 if (_dirty_cards_region_list == r) { | |
| 5640 // The last region. | |
| 5641 _dirty_cards_region_list = NULL; | |
| 5642 } | |
| 5643 r->set_next_dirty_cards_region(NULL); | |
|
796
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|
5644 } |
|
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794
diff
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|
5645 } |
| 4023 | 5646 #ifndef PRODUCT |
| 5647 if (G1VerifyCTCleanup || VerifyAfterGC) { | |
| 5648 G1VerifyCardTableCleanup cleanup_verifier(this, ct_bs); | |
| 5649 heap_region_iterate(&cleanup_verifier); | |
| 5650 } | |
| 5651 #endif | |
|
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|
5652 } |
|
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diff
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|
5653 |
| 342 | 5654 double elapsed = os::elapsedTime() - start; |
|
3979
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johnc
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3973
diff
changeset
|
5655 g1_policy()->record_clear_ct_time(elapsed * 1000.0); |
| 342 | 5656 } |
| 5657 | |
| 5658 void G1CollectedHeap::free_collection_set(HeapRegion* cs_head) { | |
| 2152 | 5659 size_t pre_used = 0; |
| 5660 FreeRegionList local_free_list("Local List for CSet Freeing"); | |
| 5661 | |
| 342 | 5662 double young_time_ms = 0.0; |
| 5663 double non_young_time_ms = 0.0; | |
| 5664 | |
|
1394
1316cec51b4d
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diff
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|
5665 // Since the collection set is a superset of the the young list, |
|
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diff
changeset
|
5666 // all we need to do to clear the young list is clear its |
|
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diff
changeset
|
5667 // head and length, and unlink any young regions in the code below |
|
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diff
changeset
|
5668 _young_list->clear(); |
|
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diff
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|
5669 |
| 342 | 5670 G1CollectorPolicy* policy = g1_policy(); |
| 5671 | |
| 5672 double start_sec = os::elapsedTime(); | |
| 5673 bool non_young = true; | |
| 5674 | |
| 5675 HeapRegion* cur = cs_head; | |
| 5676 int age_bound = -1; | |
| 5677 size_t rs_lengths = 0; | |
| 5678 | |
| 5679 while (cur != NULL) { | |
| 2361 | 5680 assert(!is_on_master_free_list(cur), "sanity"); |
| 342 | 5681 if (non_young) { |
| 5682 if (cur->is_young()) { | |
| 5683 double end_sec = os::elapsedTime(); | |
| 5684 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
| 5685 non_young_time_ms += elapsed_ms; | |
| 5686 | |
| 5687 start_sec = os::elapsedTime(); | |
| 5688 non_young = false; | |
| 5689 } | |
| 5690 } else { | |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
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4095
diff
changeset
|
5691 if (!cur->is_young()) { |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
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4095
diff
changeset
|
5692 double end_sec = os::elapsedTime(); |
|
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
5693 double elapsed_ms = (end_sec - start_sec) * 1000.0; |
|
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|
5694 young_time_ms += elapsed_ms; |
|
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|
5695 |
|
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|
5696 start_sec = os::elapsedTime(); |
|
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|
5697 non_young = true; |
|
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|
5698 } |
| 342 | 5699 } |
| 5700 | |
| 5701 rs_lengths += cur->rem_set()->occupied(); | |
| 5702 | |
| 5703 HeapRegion* next = cur->next_in_collection_set(); | |
| 5704 assert(cur->in_collection_set(), "bad CS"); | |
| 5705 cur->set_next_in_collection_set(NULL); | |
| 5706 cur->set_in_collection_set(false); | |
| 5707 | |
| 5708 if (cur->is_young()) { | |
| 5709 int index = cur->young_index_in_cset(); | |
|
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|
5710 assert(index != -1, "invariant"); |
|
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|
5711 assert((size_t) index < policy->young_cset_region_length(), "invariant"); |
| 342 | 5712 size_t words_survived = _surviving_young_words[index]; |
| 5713 cur->record_surv_words_in_group(words_survived); | |
|
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5714 |
|
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|
5715 // At this point the we have 'popped' cur from the collection set |
|
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|
5716 // (linked via next_in_collection_set()) but it is still in the |
|
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|
5717 // young list (linked via next_young_region()). Clear the |
|
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|
5718 // _next_young_region field. |
|
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|
5719 cur->set_next_young_region(NULL); |
| 342 | 5720 } else { |
| 5721 int index = cur->young_index_in_cset(); | |
|
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|
5722 assert(index == -1, "invariant"); |
| 342 | 5723 } |
| 5724 | |
| 5725 assert( (cur->is_young() && cur->young_index_in_cset() > -1) || | |
| 5726 (!cur->is_young() && cur->young_index_in_cset() == -1), | |
| 5727 "invariant" ); | |
| 5728 | |
| 5729 if (!cur->evacuation_failed()) { | |
|
4097
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|
5730 MemRegion used_mr = cur->used_region(); |
|
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|
5731 |
| 342 | 5732 // And the region is empty. |
|
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|
5733 assert(!used_mr.is_empty(), "Should not have empty regions in a CS."); |
| 2152 | 5734 free_region(cur, &pre_used, &local_free_list, false /* par */); |
| 342 | 5735 } else { |
| 5736 cur->uninstall_surv_rate_group(); | |
|
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|
5737 if (cur->is_young()) { |
| 342 | 5738 cur->set_young_index_in_cset(-1); |
|
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|
5739 } |
| 342 | 5740 cur->set_not_young(); |
| 5741 cur->set_evacuation_failed(false); | |
| 4072 | 5742 // The region is now considered to be old. |
| 5743 _old_set.add(cur); | |
| 342 | 5744 } |
| 5745 cur = next; | |
| 5746 } | |
| 5747 | |
| 5748 policy->record_max_rs_lengths(rs_lengths); | |
| 5749 policy->cset_regions_freed(); | |
| 5750 | |
| 5751 double end_sec = os::elapsedTime(); | |
| 5752 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
|
4097
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|
5753 |
|
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|
5754 if (non_young) { |
| 342 | 5755 non_young_time_ms += elapsed_ms; |
|
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|
5756 } else { |
| 342 | 5757 young_time_ms += elapsed_ms; |
|
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|
5758 } |
| 342 | 5759 |
| 2152 | 5760 update_sets_after_freeing_regions(pre_used, &local_free_list, |
| 4072 | 5761 NULL /* old_proxy_set */, |
| 2152 | 5762 NULL /* humongous_proxy_set */, |
| 5763 false /* par */); | |
| 342 | 5764 policy->record_young_free_cset_time_ms(young_time_ms); |
| 5765 policy->record_non_young_free_cset_time_ms(non_young_time_ms); | |
| 5766 } | |
| 5767 | |
|
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|
5768 // This routine is similar to the above but does not record |
|
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|
5769 // any policy statistics or update free lists; we are abandoning |
|
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|
5770 // the current incremental collection set in preparation of a |
|
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|
5771 // full collection. After the full GC we will start to build up |
|
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|
5772 // the incremental collection set again. |
|
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|
5773 // This is only called when we're doing a full collection |
|
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|
5774 // and is immediately followed by the tearing down of the young list. |
|
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|
5775 |
|
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|
5776 void G1CollectedHeap::abandon_collection_set(HeapRegion* cs_head) { |
|
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|
5777 HeapRegion* cur = cs_head; |
|
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|
5778 |
|
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|
5779 while (cur != NULL) { |
|
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|
5780 HeapRegion* next = cur->next_in_collection_set(); |
|
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|
5781 assert(cur->in_collection_set(), "bad CS"); |
|
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|
5782 cur->set_next_in_collection_set(NULL); |
|
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|
5783 cur->set_in_collection_set(false); |
|
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|
5784 cur->set_young_index_in_cset(-1); |
|
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|
5785 cur = next; |
|
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|
5786 } |
|
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|
5787 } |
|
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|
5788 |
| 2152 | 5789 void G1CollectedHeap::set_free_regions_coming() { |
| 5790 if (G1ConcRegionFreeingVerbose) { | |
| 5791 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
| 5792 "setting free regions coming"); | |
| 5793 } | |
| 5794 | |
| 5795 assert(!free_regions_coming(), "pre-condition"); | |
| 5796 _free_regions_coming = true; | |
| 342 | 5797 } |
| 5798 | |
| 2152 | 5799 void G1CollectedHeap::reset_free_regions_coming() { |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
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4836
diff
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|
5800 assert(free_regions_coming(), "pre-condition"); |
|
eff609af17d7
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|
5801 |
| 2152 | 5802 { |
| 5803 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
| 5804 _free_regions_coming = false; | |
| 5805 SecondaryFreeList_lock->notify_all(); | |
| 5806 } | |
| 5807 | |
| 5808 if (G1ConcRegionFreeingVerbose) { | |
| 5809 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
| 5810 "reset free regions coming"); | |
| 342 | 5811 } |
| 5812 } | |
| 5813 | |
| 2152 | 5814 void G1CollectedHeap::wait_while_free_regions_coming() { |
| 5815 // Most of the time we won't have to wait, so let's do a quick test | |
| 5816 // first before we take the lock. | |
| 5817 if (!free_regions_coming()) { | |
| 5818 return; | |
| 5819 } | |
| 5820 | |
| 5821 if (G1ConcRegionFreeingVerbose) { | |
| 5822 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
| 5823 "waiting for free regions"); | |
| 342 | 5824 } |
| 5825 | |
| 5826 { | |
| 2152 | 5827 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
| 5828 while (free_regions_coming()) { | |
| 5829 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
| 342 | 5830 } |
| 2152 | 5831 } |
| 5832 | |
| 5833 if (G1ConcRegionFreeingVerbose) { | |
| 5834 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
| 5835 "done waiting for free regions"); | |
| 5836 } | |
| 342 | 5837 } |
| 5838 | |
| 5839 void G1CollectedHeap::set_region_short_lived_locked(HeapRegion* hr) { | |
| 5840 assert(heap_lock_held_for_gc(), | |
| 5841 "the heap lock should already be held by or for this thread"); | |
| 5842 _young_list->push_region(hr); | |
| 5843 } | |
| 5844 | |
| 5845 class NoYoungRegionsClosure: public HeapRegionClosure { | |
| 5846 private: | |
| 5847 bool _success; | |
| 5848 public: | |
| 5849 NoYoungRegionsClosure() : _success(true) { } | |
| 5850 bool doHeapRegion(HeapRegion* r) { | |
| 5851 if (r->is_young()) { | |
| 5852 gclog_or_tty->print_cr("Region ["PTR_FORMAT", "PTR_FORMAT") tagged as young", | |
| 5853 r->bottom(), r->end()); | |
| 5854 _success = false; | |
| 5855 } | |
| 5856 return false; | |
| 5857 } | |
| 5858 bool success() { return _success; } | |
| 5859 }; | |
| 5860 | |
|
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|
5861 bool G1CollectedHeap::check_young_list_empty(bool check_heap, bool check_sample) { |
|
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|
5862 bool ret = _young_list->check_list_empty(check_sample); |
|
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|
5863 |
|
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|
5864 if (check_heap) { |
| 342 | 5865 NoYoungRegionsClosure closure; |
| 5866 heap_region_iterate(&closure); | |
| 5867 ret = ret && closure.success(); | |
| 5868 } | |
| 5869 | |
| 5870 return ret; | |
| 5871 } | |
| 5872 | |
| 4072 | 5873 class TearDownRegionSetsClosure : public HeapRegionClosure { |
| 5874 private: | |
| 5875 OldRegionSet *_old_set; | |
| 2152 | 5876 |
| 342 | 5877 public: |
| 4072 | 5878 TearDownRegionSetsClosure(OldRegionSet* old_set) : _old_set(old_set) { } |
| 2152 | 5879 |
| 342 | 5880 bool doHeapRegion(HeapRegion* r) { |
| 4072 | 5881 if (r->is_empty()) { |
| 5882 // We ignore empty regions, we'll empty the free list afterwards | |
| 5883 } else if (r->is_young()) { | |
| 5884 // We ignore young regions, we'll empty the young list afterwards | |
| 5885 } else if (r->isHumongous()) { | |
| 5886 // We ignore humongous regions, we're not tearing down the | |
| 5887 // humongous region set | |
| 342 | 5888 } else { |
| 4072 | 5889 // The rest should be old |
| 5890 _old_set->remove(r); | |
| 342 | 5891 } |
| 5892 return false; | |
| 5893 } | |
| 5894 | |
| 4072 | 5895 ~TearDownRegionSetsClosure() { |
| 5896 assert(_old_set->is_empty(), "post-condition"); | |
| 2152 | 5897 } |
| 342 | 5898 }; |
| 5899 | |
| 4072 | 5900 void G1CollectedHeap::tear_down_region_sets(bool free_list_only) { |
| 5901 assert_at_safepoint(true /* should_be_vm_thread */); | |
| 5902 | |
| 5903 if (!free_list_only) { | |
| 5904 TearDownRegionSetsClosure cl(&_old_set); | |
| 5905 heap_region_iterate(&cl); | |
| 5906 | |
| 5907 // Need to do this after the heap iteration to be able to | |
| 5908 // recognize the young regions and ignore them during the iteration. | |
| 5909 _young_list->empty_list(); | |
| 5910 } | |
| 5911 _free_list.remove_all(); | |
| 5912 } | |
| 5913 | |
| 5914 class RebuildRegionSetsClosure : public HeapRegionClosure { | |
| 5915 private: | |
| 5916 bool _free_list_only; | |
| 5917 OldRegionSet* _old_set; | |
| 5918 FreeRegionList* _free_list; | |
| 5919 size_t _total_used; | |
| 5920 | |
| 5921 public: | |
| 5922 RebuildRegionSetsClosure(bool free_list_only, | |
| 5923 OldRegionSet* old_set, FreeRegionList* free_list) : | |
| 5924 _free_list_only(free_list_only), | |
| 5925 _old_set(old_set), _free_list(free_list), _total_used(0) { | |
| 5926 assert(_free_list->is_empty(), "pre-condition"); | |
| 5927 if (!free_list_only) { | |
| 5928 assert(_old_set->is_empty(), "pre-condition"); | |
| 5929 } | |
| 5930 } | |
| 5931 | |
| 5932 bool doHeapRegion(HeapRegion* r) { | |
| 5933 if (r->continuesHumongous()) { | |
| 5934 return false; | |
| 5935 } | |
| 5936 | |
| 5937 if (r->is_empty()) { | |
| 5938 // Add free regions to the free list | |
| 5939 _free_list->add_as_tail(r); | |
| 5940 } else if (!_free_list_only) { | |
| 5941 assert(!r->is_young(), "we should not come across young regions"); | |
| 5942 | |
| 5943 if (r->isHumongous()) { | |
| 5944 // We ignore humongous regions, we left the humongous set unchanged | |
| 5945 } else { | |
| 5946 // The rest should be old, add them to the old set | |
| 5947 _old_set->add(r); | |
| 5948 } | |
| 5949 _total_used += r->used(); | |
| 5950 } | |
| 5951 | |
| 5952 return false; | |
| 5953 } | |
| 5954 | |
| 5955 size_t total_used() { | |
| 5956 return _total_used; | |
| 5957 } | |
| 5958 }; | |
| 5959 | |
| 5960 void G1CollectedHeap::rebuild_region_sets(bool free_list_only) { | |
| 5961 assert_at_safepoint(true /* should_be_vm_thread */); | |
| 5962 | |
| 5963 RebuildRegionSetsClosure cl(free_list_only, &_old_set, &_free_list); | |
| 5964 heap_region_iterate(&cl); | |
| 5965 | |
| 5966 if (!free_list_only) { | |
| 5967 _summary_bytes_used = cl.total_used(); | |
| 5968 } | |
| 5969 assert(_summary_bytes_used == recalculate_used(), | |
| 5970 err_msg("inconsistent _summary_bytes_used, " | |
| 5971 "value: "SIZE_FORMAT" recalculated: "SIZE_FORMAT, | |
| 5972 _summary_bytes_used, recalculate_used())); | |
| 342 | 5973 } |
| 5974 | |
| 5975 void G1CollectedHeap::set_refine_cte_cl_concurrency(bool concurrent) { | |
| 5976 _refine_cte_cl->set_concurrent(concurrent); | |
| 5977 } | |
| 5978 | |
| 5979 bool G1CollectedHeap::is_in_closed_subset(const void* p) const { | |
| 5980 HeapRegion* hr = heap_region_containing(p); | |
| 5981 if (hr == NULL) { | |
| 5982 return is_in_permanent(p); | |
| 5983 } else { | |
| 5984 return hr->is_in(p); | |
| 5985 } | |
| 5986 } | |
| 2152 | 5987 |
|
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|
5988 // Methods for the mutator alloc region |
|
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|
5989 |
|
2433
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|
5990 HeapRegion* G1CollectedHeap::new_mutator_alloc_region(size_t word_size, |
|
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diff
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|
5991 bool force) { |
|
abdfc822206f
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diff
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|
5992 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
|
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diff
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|
5993 assert(!force || g1_policy()->can_expand_young_list(), |
|
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diff
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|
5994 "if force is true we should be able to expand the young list"); |
|
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5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
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diff
changeset
|
5995 bool young_list_full = g1_policy()->is_young_list_full(); |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
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diff
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|
5996 if (force || !young_list_full) { |
|
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changeset
|
5997 HeapRegion* new_alloc_region = new_region(word_size, |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
5998 false /* do_expand */); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
5999 if (new_alloc_region != NULL) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6000 set_region_short_lived_locked(new_alloc_region); |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6001 _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
|
6002 return new_alloc_region; |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6003 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6004 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6005 return NULL; |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6006 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6007 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6008 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
|
6009 size_t allocated_bytes) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6010 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
|
6011 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
|
6012 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6013 g1_policy()->add_region_to_incremental_cset_lhs(alloc_region); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6014 _summary_bytes_used += allocated_bytes; |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6015 _hr_printer.retire(alloc_region); |
|
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6016 // 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
|
6017 // instead of when it's allocated, since this is the point that its |
|
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6018 // used space has been recored in _summary_bytes_used. |
|
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6019 g1mm()->update_eden_size(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6020 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6021 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6022 HeapRegion* MutatorAllocRegion::allocate_new_region(size_t word_size, |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6023 bool force) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6024 return _g1h->new_mutator_alloc_region(word_size, force); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6025 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6026 |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6027 void G1CollectedHeap::set_par_threads() { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6028 // 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
|
6029 // in the workgroup. |
| 4711 | 6030 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
|
6031 uint n_workers = workers()->active_workers(); |
| 4711 | 6032 assert(UseDynamicNumberOfGCThreads || |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6033 n_workers == workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6034 "Otherwise should be using the total number of workers"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6035 if (n_workers == 0) { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6036 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
|
6037 n_workers = ParallelGCThreads; |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6038 workers()->set_active_workers(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6039 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6040 set_par_threads(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6041 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6042 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6043 void MutatorAllocRegion::retire_region(HeapRegion* alloc_region, |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6044 size_t allocated_bytes) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6045 _g1h->retire_mutator_alloc_region(alloc_region, allocated_bytes); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6046 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6047 |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6048 // Methods for the GC alloc regions |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6049 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6050 HeapRegion* G1CollectedHeap::new_gc_alloc_region(size_t word_size, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6051 size_t count, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6052 GCAllocPurpose ap) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6053 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
|
6054 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6055 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
|
6056 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
|
6057 true /* do_expand */); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6058 if (new_alloc_region != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6059 // 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
|
6060 // 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
|
6061 // for survivors too. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6062 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
|
6063 if (ap == GCAllocForSurvived) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6064 new_alloc_region->set_survivor(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6065 _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
|
6066 } else { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6067 _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
|
6068 } |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
6069 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
|
6070 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
|
6071 return new_alloc_region; |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6072 } else { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6073 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
|
6074 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6075 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6076 return NULL; |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6077 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6078 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6079 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
|
6080 size_t allocated_bytes, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6081 GCAllocPurpose ap) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
6082 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
|
6083 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
|
6084 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
|
6085 if (ap == GCAllocForSurvived) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6086 young_list()->add_survivor_region(alloc_region); |
| 4072 | 6087 } else { |
| 6088 _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
|
6089 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6090 _hr_printer.retire(alloc_region); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6091 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6092 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6093 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
|
6094 bool force) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6095 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
|
6096 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
|
6097 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6098 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6099 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
|
6100 size_t allocated_bytes) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6101 _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
|
6102 GCAllocForSurvived); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6103 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6104 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6105 HeapRegion* OldGCAllocRegion::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
|
6106 bool force) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6107 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
|
6108 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
parents:
3824
diff
changeset
|
6109 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6110 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6111 void OldGCAllocRegion::retire_region(HeapRegion* alloc_region, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6112 size_t allocated_bytes) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6113 _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
|
6114 GCAllocForTenured); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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6115 } |
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7023069: G1: Introduce symmetric locking in the slow allocation path
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6116 // Heap region set verification |
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7023069: G1: Introduce symmetric locking in the slow allocation path
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6117 |
| 2152 | 6118 class VerifyRegionListsClosure : public HeapRegionClosure { |
| 6119 private: | |
| 4072 | 6120 FreeRegionList* _free_list; |
| 6121 OldRegionSet* _old_set; | |
| 2152 | 6122 HumongousRegionSet* _humongous_set; |
| 6123 size_t _region_count; | |
| 6124 | |
| 6125 public: | |
| 4072 | 6126 VerifyRegionListsClosure(OldRegionSet* old_set, |
| 6127 HumongousRegionSet* humongous_set, | |
| 2152 | 6128 FreeRegionList* free_list) : |
| 4072 | 6129 _old_set(old_set), _humongous_set(humongous_set), |
| 6130 _free_list(free_list), _region_count(0) { } | |
| 2152 | 6131 |
| 6132 size_t region_count() { return _region_count; } | |
| 6133 | |
| 6134 bool doHeapRegion(HeapRegion* hr) { | |
| 6135 _region_count += 1; | |
| 6136 | |
| 6137 if (hr->continuesHumongous()) { | |
| 6138 return false; | |
| 6139 } | |
| 6140 | |
| 6141 if (hr->is_young()) { | |
| 6142 // TODO | |
| 6143 } else if (hr->startsHumongous()) { | |
| 6144 _humongous_set->verify_next_region(hr); | |
| 6145 } else if (hr->is_empty()) { | |
| 6146 _free_list->verify_next_region(hr); | |
| 4072 | 6147 } else { |
| 6148 _old_set->verify_next_region(hr); | |
| 2152 | 6149 } |
| 6150 return false; | |
| 6151 } | |
| 6152 }; | |
| 6153 | |
| 3766 | 6154 HeapRegion* G1CollectedHeap::new_heap_region(size_t hrs_index, |
| 6155 HeapWord* bottom) { | |
| 6156 HeapWord* end = bottom + HeapRegion::GrainWords; | |
| 6157 MemRegion mr(bottom, end); | |
| 6158 assert(_g1_reserved.contains(mr), "invariant"); | |
| 6159 // This might return NULL if the allocation fails | |
| 6160 return new HeapRegion(hrs_index, _bot_shared, mr, true /* is_zeroed */); | |
| 6161 } | |
| 6162 | |
| 2152 | 6163 void G1CollectedHeap::verify_region_sets() { |
| 6164 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); | |
| 6165 | |
| 6166 // First, check the explicit lists. | |
| 6167 _free_list.verify(); | |
| 6168 { | |
| 6169 // Given that a concurrent operation might be adding regions to | |
| 6170 // the secondary free list we have to take the lock before | |
| 6171 // verifying it. | |
| 6172 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
| 6173 _secondary_free_list.verify(); | |
| 6174 } | |
| 4072 | 6175 _old_set.verify(); |
| 2152 | 6176 _humongous_set.verify(); |
| 6177 | |
| 6178 // If a concurrent region freeing operation is in progress it will | |
| 6179 // be difficult to correctly attributed any free regions we come | |
| 6180 // across to the correct free list given that they might belong to | |
| 6181 // one of several (free_list, secondary_free_list, any local lists, | |
| 6182 // etc.). So, if that's the case we will skip the rest of the | |
| 6183 // verification operation. Alternatively, waiting for the concurrent | |
| 6184 // operation to complete will have a non-trivial effect on the GC's | |
| 6185 // operation (no concurrent operation will last longer than the | |
| 6186 // interval between two calls to verification) and it might hide | |
| 6187 // any issues that we would like to catch during testing. | |
| 6188 if (free_regions_coming()) { | |
| 6189 return; | |
| 6190 } | |
| 6191 | |
| 2361 | 6192 // Make sure we append the secondary_free_list on the free_list so |
| 6193 // that all free regions we will come across can be safely | |
| 6194 // attributed to the free_list. | |
| 6195 append_secondary_free_list_if_not_empty_with_lock(); | |
| 2152 | 6196 |
| 6197 // Finally, make sure that the region accounting in the lists is | |
| 6198 // consistent with what we see in the heap. | |
| 4072 | 6199 _old_set.verify_start(); |
| 2152 | 6200 _humongous_set.verify_start(); |
| 6201 _free_list.verify_start(); | |
| 6202 | |
| 4072 | 6203 VerifyRegionListsClosure cl(&_old_set, &_humongous_set, &_free_list); |
| 2152 | 6204 heap_region_iterate(&cl); |
| 6205 | |
| 4072 | 6206 _old_set.verify_end(); |
| 2152 | 6207 _humongous_set.verify_end(); |
| 6208 _free_list.verify_end(); | |
| 342 | 6209 } |