Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp @ 6611:7383557659bd
7185699: G1: Prediction model discrepancies
Summary: Correct the result value of G1CollectedHeap::pending_card_num(). Change the code that calculates the GC efficiency of a non-young heap region to use historical data from mixed GCs and the actual number of live bytes when predicting how long it would take to collect the region. Changes were also reviewed by Thomas Schatzl.
Reviewed-by: azeemj, brutisso
| author | johnc |
|---|---|
| date | Tue, 21 Aug 2012 14:10:39 -0700 |
| parents | f99a36499b8c |
| children | bb3f6194fedb |
| rev | line source |
|---|---|
| 342 | 1 /* |
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2 * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved. |
| 342 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 342 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "code/icBuffer.hpp" | |
| 27 #include "gc_implementation/g1/bufferingOopClosure.hpp" | |
| 28 #include "gc_implementation/g1/concurrentG1Refine.hpp" | |
| 29 #include "gc_implementation/g1/concurrentG1RefineThread.hpp" | |
| 30 #include "gc_implementation/g1/concurrentMarkThread.inline.hpp" | |
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31 #include "gc_implementation/g1/g1AllocRegion.inline.hpp" |
| 1972 | 32 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" |
| 33 #include "gc_implementation/g1/g1CollectorPolicy.hpp" | |
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34 #include "gc_implementation/g1/g1ErgoVerbose.hpp" |
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35 #include "gc_implementation/g1/g1EvacFailure.hpp" |
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36 #include "gc_implementation/g1/g1GCPhaseTimes.hpp" |
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37 #include "gc_implementation/g1/g1Log.hpp" |
| 1972 | 38 #include "gc_implementation/g1/g1MarkSweep.hpp" |
| 39 #include "gc_implementation/g1/g1OopClosures.inline.hpp" | |
| 40 #include "gc_implementation/g1/g1RemSet.inline.hpp" | |
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41 #include "gc_implementation/g1/heapRegion.inline.hpp" |
| 1972 | 42 #include "gc_implementation/g1/heapRegionRemSet.hpp" |
| 43 #include "gc_implementation/g1/heapRegionSeq.inline.hpp" | |
| 44 #include "gc_implementation/g1/vm_operations_g1.hpp" | |
| 45 #include "gc_implementation/shared/isGCActiveMark.hpp" | |
| 46 #include "memory/gcLocker.inline.hpp" | |
| 47 #include "memory/genOopClosures.inline.hpp" | |
| 48 #include "memory/generationSpec.hpp" | |
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49 #include "memory/referenceProcessor.hpp" |
| 1972 | 50 #include "oops/oop.inline.hpp" |
| 51 #include "oops/oop.pcgc.inline.hpp" | |
| 52 #include "runtime/aprofiler.hpp" | |
| 53 #include "runtime/vmThread.hpp" | |
| 342 | 54 |
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55 size_t G1CollectedHeap::_humongous_object_threshold_in_words = 0; |
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56 |
| 342 | 57 // turn it on so that the contents of the young list (scan-only / |
| 58 // to-be-collected) are printed at "strategic" points before / during | |
| 59 // / after the collection --- this is useful for debugging | |
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60 #define YOUNG_LIST_VERBOSE 0 |
| 342 | 61 // CURRENT STATUS |
| 62 // This file is under construction. Search for "FIXME". | |
| 63 | |
| 64 // INVARIANTS/NOTES | |
| 65 // | |
| 66 // All allocation activity covered by the G1CollectedHeap interface is | |
| 1973 | 67 // serialized by acquiring the HeapLock. This happens in mem_allocate |
| 68 // and allocate_new_tlab, which are the "entry" points to the | |
| 69 // allocation code from the rest of the JVM. (Note that this does not | |
| 70 // apply to TLAB allocation, which is not part of this interface: it | |
| 71 // is done by clients of this interface.) | |
| 342 | 72 |
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73 // Notes on implementation of parallelism in different tasks. |
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74 // |
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75 // G1ParVerifyTask uses heap_region_par_iterate_chunked() for parallelism. |
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76 // The number of GC workers is passed to heap_region_par_iterate_chunked(). |
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77 // It does use run_task() which sets _n_workers in the task. |
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78 // G1ParTask executes g1_process_strong_roots() -> |
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79 // SharedHeap::process_strong_roots() which calls eventuall to |
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80 // CardTableModRefBS::par_non_clean_card_iterate_work() which uses |
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81 // SequentialSubTasksDone. SharedHeap::process_strong_roots() also |
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82 // directly uses SubTasksDone (_process_strong_tasks field in SharedHeap). |
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83 // |
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84 |
| 342 | 85 // Local to this file. |
| 86 | |
| 87 class RefineCardTableEntryClosure: public CardTableEntryClosure { | |
| 88 SuspendibleThreadSet* _sts; | |
| 89 G1RemSet* _g1rs; | |
| 90 ConcurrentG1Refine* _cg1r; | |
| 91 bool _concurrent; | |
| 92 public: | |
| 93 RefineCardTableEntryClosure(SuspendibleThreadSet* sts, | |
| 94 G1RemSet* g1rs, | |
| 95 ConcurrentG1Refine* cg1r) : | |
| 96 _sts(sts), _g1rs(g1rs), _cg1r(cg1r), _concurrent(true) | |
| 97 {} | |
| 98 bool do_card_ptr(jbyte* card_ptr, int worker_i) { | |
| 1705 | 99 bool oops_into_cset = _g1rs->concurrentRefineOneCard(card_ptr, worker_i, false); |
| 100 // This path is executed by the concurrent refine or mutator threads, | |
| 101 // concurrently, and so we do not care if card_ptr contains references | |
| 102 // that point into the collection set. | |
| 103 assert(!oops_into_cset, "should be"); | |
| 104 | |
| 342 | 105 if (_concurrent && _sts->should_yield()) { |
| 106 // Caller will actually yield. | |
| 107 return false; | |
| 108 } | |
| 109 // Otherwise, we finished successfully; return true. | |
| 110 return true; | |
| 111 } | |
| 112 void set_concurrent(bool b) { _concurrent = b; } | |
| 113 }; | |
| 114 | |
| 115 | |
| 116 class ClearLoggedCardTableEntryClosure: public CardTableEntryClosure { | |
| 117 int _calls; | |
| 118 G1CollectedHeap* _g1h; | |
| 119 CardTableModRefBS* _ctbs; | |
| 120 int _histo[256]; | |
| 121 public: | |
| 122 ClearLoggedCardTableEntryClosure() : | |
| 123 _calls(0) | |
| 124 { | |
| 125 _g1h = G1CollectedHeap::heap(); | |
| 126 _ctbs = (CardTableModRefBS*)_g1h->barrier_set(); | |
| 127 for (int i = 0; i < 256; i++) _histo[i] = 0; | |
| 128 } | |
| 129 bool do_card_ptr(jbyte* card_ptr, int worker_i) { | |
| 130 if (_g1h->is_in_reserved(_ctbs->addr_for(card_ptr))) { | |
| 131 _calls++; | |
| 132 unsigned char* ujb = (unsigned char*)card_ptr; | |
| 133 int ind = (int)(*ujb); | |
| 134 _histo[ind]++; | |
| 135 *card_ptr = -1; | |
| 136 } | |
| 137 return true; | |
| 138 } | |
| 139 int calls() { return _calls; } | |
| 140 void print_histo() { | |
| 141 gclog_or_tty->print_cr("Card table value histogram:"); | |
| 142 for (int i = 0; i < 256; i++) { | |
| 143 if (_histo[i] != 0) { | |
| 144 gclog_or_tty->print_cr(" %d: %d", i, _histo[i]); | |
| 145 } | |
| 146 } | |
| 147 } | |
| 148 }; | |
| 149 | |
| 150 class RedirtyLoggedCardTableEntryClosure: public CardTableEntryClosure { | |
| 151 int _calls; | |
| 152 G1CollectedHeap* _g1h; | |
| 153 CardTableModRefBS* _ctbs; | |
| 154 public: | |
| 155 RedirtyLoggedCardTableEntryClosure() : | |
| 156 _calls(0) | |
| 157 { | |
| 158 _g1h = G1CollectedHeap::heap(); | |
| 159 _ctbs = (CardTableModRefBS*)_g1h->barrier_set(); | |
| 160 } | |
| 161 bool do_card_ptr(jbyte* card_ptr, int worker_i) { | |
| 162 if (_g1h->is_in_reserved(_ctbs->addr_for(card_ptr))) { | |
| 163 _calls++; | |
| 164 *card_ptr = 0; | |
| 165 } | |
| 166 return true; | |
| 167 } | |
| 168 int calls() { return _calls; } | |
| 169 }; | |
| 170 | |
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171 class RedirtyLoggedCardTableEntryFastClosure : public CardTableEntryClosure { |
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172 public: |
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173 bool do_card_ptr(jbyte* card_ptr, int worker_i) { |
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174 *card_ptr = CardTableModRefBS::dirty_card_val(); |
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175 return true; |
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176 } |
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177 }; |
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178 |
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179 YoungList::YoungList(G1CollectedHeap* g1h) : |
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180 _g1h(g1h), _head(NULL), _length(0), _last_sampled_rs_lengths(0), |
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181 _survivor_head(NULL), _survivor_tail(NULL), _survivor_length(0) { |
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182 guarantee(check_list_empty(false), "just making sure..."); |
| 342 | 183 } |
| 184 | |
| 185 void YoungList::push_region(HeapRegion *hr) { | |
| 186 assert(!hr->is_young(), "should not already be young"); | |
| 187 assert(hr->get_next_young_region() == NULL, "cause it should!"); | |
| 188 | |
| 189 hr->set_next_young_region(_head); | |
| 190 _head = hr; | |
| 191 | |
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192 _g1h->g1_policy()->set_region_eden(hr, (int) _length); |
| 342 | 193 ++_length; |
| 194 } | |
| 195 | |
| 196 void YoungList::add_survivor_region(HeapRegion* hr) { | |
| 545 | 197 assert(hr->is_survivor(), "should be flagged as survivor region"); |
| 342 | 198 assert(hr->get_next_young_region() == NULL, "cause it should!"); |
| 199 | |
| 200 hr->set_next_young_region(_survivor_head); | |
| 201 if (_survivor_head == NULL) { | |
| 545 | 202 _survivor_tail = hr; |
| 342 | 203 } |
| 204 _survivor_head = hr; | |
| 205 ++_survivor_length; | |
| 206 } | |
| 207 | |
| 208 void YoungList::empty_list(HeapRegion* list) { | |
| 209 while (list != NULL) { | |
| 210 HeapRegion* next = list->get_next_young_region(); | |
| 211 list->set_next_young_region(NULL); | |
| 212 list->uninstall_surv_rate_group(); | |
| 213 list->set_not_young(); | |
| 214 list = next; | |
| 215 } | |
| 216 } | |
| 217 | |
| 218 void YoungList::empty_list() { | |
| 219 assert(check_list_well_formed(), "young list should be well formed"); | |
| 220 | |
| 221 empty_list(_head); | |
| 222 _head = NULL; | |
| 223 _length = 0; | |
| 224 | |
| 225 empty_list(_survivor_head); | |
| 226 _survivor_head = NULL; | |
| 545 | 227 _survivor_tail = NULL; |
| 342 | 228 _survivor_length = 0; |
| 229 | |
| 230 _last_sampled_rs_lengths = 0; | |
| 231 | |
| 232 assert(check_list_empty(false), "just making sure..."); | |
| 233 } | |
| 234 | |
| 235 bool YoungList::check_list_well_formed() { | |
| 236 bool ret = true; | |
| 237 | |
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238 uint length = 0; |
| 342 | 239 HeapRegion* curr = _head; |
| 240 HeapRegion* last = NULL; | |
| 241 while (curr != NULL) { | |
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242 if (!curr->is_young()) { |
| 342 | 243 gclog_or_tty->print_cr("### YOUNG REGION "PTR_FORMAT"-"PTR_FORMAT" " |
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244 "incorrectly tagged (y: %d, surv: %d)", |
| 342 | 245 curr->bottom(), curr->end(), |
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246 curr->is_young(), curr->is_survivor()); |
| 342 | 247 ret = false; |
| 248 } | |
| 249 ++length; | |
| 250 last = curr; | |
| 251 curr = curr->get_next_young_region(); | |
| 252 } | |
| 253 ret = ret && (length == _length); | |
| 254 | |
| 255 if (!ret) { | |
| 256 gclog_or_tty->print_cr("### YOUNG LIST seems not well formed!"); | |
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257 gclog_or_tty->print_cr("### list has %u entries, _length is %u", |
| 342 | 258 length, _length); |
| 259 } | |
| 260 | |
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261 return ret; |
| 342 | 262 } |
| 263 | |
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264 bool YoungList::check_list_empty(bool check_sample) { |
| 342 | 265 bool ret = true; |
| 266 | |
| 267 if (_length != 0) { | |
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268 gclog_or_tty->print_cr("### YOUNG LIST should have 0 length, not %u", |
| 342 | 269 _length); |
| 270 ret = false; | |
| 271 } | |
| 272 if (check_sample && _last_sampled_rs_lengths != 0) { | |
| 273 gclog_or_tty->print_cr("### YOUNG LIST has non-zero last sampled RS lengths"); | |
| 274 ret = false; | |
| 275 } | |
| 276 if (_head != NULL) { | |
| 277 gclog_or_tty->print_cr("### YOUNG LIST does not have a NULL head"); | |
| 278 ret = false; | |
| 279 } | |
| 280 if (!ret) { | |
| 281 gclog_or_tty->print_cr("### YOUNG LIST does not seem empty"); | |
| 282 } | |
| 283 | |
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284 return ret; |
| 342 | 285 } |
| 286 | |
| 287 void | |
| 288 YoungList::rs_length_sampling_init() { | |
| 289 _sampled_rs_lengths = 0; | |
| 290 _curr = _head; | |
| 291 } | |
| 292 | |
| 293 bool | |
| 294 YoungList::rs_length_sampling_more() { | |
| 295 return _curr != NULL; | |
| 296 } | |
| 297 | |
| 298 void | |
| 299 YoungList::rs_length_sampling_next() { | |
| 300 assert( _curr != NULL, "invariant" ); | |
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301 size_t rs_length = _curr->rem_set()->occupied(); |
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302 |
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303 _sampled_rs_lengths += rs_length; |
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304 |
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305 // The current region may not yet have been added to the |
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306 // incremental collection set (it gets added when it is |
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307 // retired as the current allocation region). |
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308 if (_curr->in_collection_set()) { |
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309 // Update the collection set policy information for this region |
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310 _g1h->g1_policy()->update_incremental_cset_info(_curr, rs_length); |
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311 } |
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312 |
| 342 | 313 _curr = _curr->get_next_young_region(); |
| 314 if (_curr == NULL) { | |
| 315 _last_sampled_rs_lengths = _sampled_rs_lengths; | |
| 316 // gclog_or_tty->print_cr("last sampled RS lengths = %d", _last_sampled_rs_lengths); | |
| 317 } | |
| 318 } | |
| 319 | |
| 320 void | |
| 321 YoungList::reset_auxilary_lists() { | |
| 322 guarantee( is_empty(), "young list should be empty" ); | |
| 323 assert(check_list_well_formed(), "young list should be well formed"); | |
| 324 | |
| 325 // Add survivor regions to SurvRateGroup. | |
| 326 _g1h->g1_policy()->note_start_adding_survivor_regions(); | |
| 545 | 327 _g1h->g1_policy()->finished_recalculating_age_indexes(true /* is_survivors */); |
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328 |
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329 int young_index_in_cset = 0; |
| 342 | 330 for (HeapRegion* curr = _survivor_head; |
| 331 curr != NULL; | |
| 332 curr = curr->get_next_young_region()) { | |
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333 _g1h->g1_policy()->set_region_survivor(curr, young_index_in_cset); |
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334 |
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335 // The region is a non-empty survivor so let's add it to |
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336 // the incremental collection set for the next evacuation |
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337 // pause. |
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338 _g1h->g1_policy()->add_region_to_incremental_cset_rhs(curr); |
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339 young_index_in_cset += 1; |
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340 } |
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341 assert((uint) young_index_in_cset == _survivor_length, "post-condition"); |
| 342 | 342 _g1h->g1_policy()->note_stop_adding_survivor_regions(); |
| 343 | |
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344 _head = _survivor_head; |
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345 _length = _survivor_length; |
| 342 | 346 if (_survivor_head != NULL) { |
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347 assert(_survivor_tail != NULL, "cause it shouldn't be"); |
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348 assert(_survivor_length > 0, "invariant"); |
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349 _survivor_tail->set_next_young_region(NULL); |
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350 } |
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351 |
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352 // Don't clear the survivor list handles until the start of |
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353 // the next evacuation pause - we need it in order to re-tag |
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354 // the survivor regions from this evacuation pause as 'young' |
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355 // at the start of the next. |
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356 |
| 545 | 357 _g1h->g1_policy()->finished_recalculating_age_indexes(false /* is_survivors */); |
| 342 | 358 |
| 359 assert(check_list_well_formed(), "young list should be well formed"); | |
| 360 } | |
| 361 | |
| 362 void YoungList::print() { | |
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363 HeapRegion* lists[] = {_head, _survivor_head}; |
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364 const char* names[] = {"YOUNG", "SURVIVOR"}; |
| 342 | 365 |
| 366 for (unsigned int list = 0; list < ARRAY_SIZE(lists); ++list) { | |
| 367 gclog_or_tty->print_cr("%s LIST CONTENTS", names[list]); | |
| 368 HeapRegion *curr = lists[list]; | |
| 369 if (curr == NULL) | |
| 370 gclog_or_tty->print_cr(" empty"); | |
| 371 while (curr != NULL) { | |
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372 gclog_or_tty->print_cr(" "HR_FORMAT", P: "PTR_FORMAT "N: "PTR_FORMAT", age: %4d", |
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373 HR_FORMAT_PARAMS(curr), |
| 342 | 374 curr->prev_top_at_mark_start(), |
| 375 curr->next_top_at_mark_start(), | |
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376 curr->age_in_surv_rate_group_cond()); |
| 342 | 377 curr = curr->get_next_young_region(); |
| 378 } | |
| 379 } | |
| 380 | |
| 381 gclog_or_tty->print_cr(""); | |
| 382 } | |
| 383 | |
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384 void G1CollectedHeap::push_dirty_cards_region(HeapRegion* hr) |
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385 { |
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386 // Claim the right to put the region on the dirty cards region list |
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387 // by installing a self pointer. |
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388 HeapRegion* next = hr->get_next_dirty_cards_region(); |
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389 if (next == NULL) { |
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390 HeapRegion* res = (HeapRegion*) |
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391 Atomic::cmpxchg_ptr(hr, hr->next_dirty_cards_region_addr(), |
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392 NULL); |
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393 if (res == NULL) { |
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394 HeapRegion* head; |
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395 do { |
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396 // Put the region to the dirty cards region list. |
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397 head = _dirty_cards_region_list; |
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398 next = (HeapRegion*) |
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399 Atomic::cmpxchg_ptr(hr, &_dirty_cards_region_list, head); |
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400 if (next == head) { |
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401 assert(hr->get_next_dirty_cards_region() == hr, |
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402 "hr->get_next_dirty_cards_region() != hr"); |
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403 if (next == NULL) { |
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404 // The last region in the list points to itself. |
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405 hr->set_next_dirty_cards_region(hr); |
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406 } else { |
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407 hr->set_next_dirty_cards_region(next); |
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408 } |
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409 } |
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410 } while (next != head); |
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411 } |
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412 } |
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413 } |
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414 |
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415 HeapRegion* G1CollectedHeap::pop_dirty_cards_region() |
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416 { |
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417 HeapRegion* head; |
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418 HeapRegion* hr; |
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419 do { |
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420 head = _dirty_cards_region_list; |
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421 if (head == NULL) { |
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422 return NULL; |
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423 } |
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424 HeapRegion* new_head = head->get_next_dirty_cards_region(); |
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425 if (head == new_head) { |
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426 // The last region. |
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427 new_head = NULL; |
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428 } |
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429 hr = (HeapRegion*)Atomic::cmpxchg_ptr(new_head, &_dirty_cards_region_list, |
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430 head); |
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431 } while (hr != head); |
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432 assert(hr != NULL, "invariant"); |
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433 hr->set_next_dirty_cards_region(NULL); |
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434 return hr; |
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435 } |
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436 |
| 342 | 437 void G1CollectedHeap::stop_conc_gc_threads() { |
| 794 | 438 _cg1r->stop(); |
| 342 | 439 _cmThread->stop(); |
| 440 } | |
| 441 | |
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442 #ifdef ASSERT |
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443 // A region is added to the collection set as it is retired |
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444 // so an address p can point to a region which will be in the |
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445 // collection set but has not yet been retired. This method |
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446 // therefore is only accurate during a GC pause after all |
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447 // regions have been retired. It is used for debugging |
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448 // to check if an nmethod has references to objects that can |
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449 // be move during a partial collection. Though it can be |
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450 // inaccurate, it is sufficient for G1 because the conservative |
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451 // implementation of is_scavengable() for G1 will indicate that |
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452 // all nmethods must be scanned during a partial collection. |
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453 bool G1CollectedHeap::is_in_partial_collection(const void* p) { |
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454 HeapRegion* hr = heap_region_containing(p); |
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455 return hr != NULL && hr->in_collection_set(); |
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456 } |
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457 #endif |
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458 |
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459 // Returns true if the reference points to an object that |
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460 // can move in an incremental collecction. |
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461 bool G1CollectedHeap::is_scavengable(const void* p) { |
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462 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
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463 G1CollectorPolicy* g1p = g1h->g1_policy(); |
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464 HeapRegion* hr = heap_region_containing(p); |
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465 if (hr == NULL) { |
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466 // perm gen (or null) |
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467 return false; |
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468 } else { |
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469 return !hr->isHumongous(); |
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470 } |
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471 } |
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472 |
| 342 | 473 void G1CollectedHeap::check_ct_logs_at_safepoint() { |
| 474 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
| 475 CardTableModRefBS* ct_bs = (CardTableModRefBS*)barrier_set(); | |
| 476 | |
| 477 // Count the dirty cards at the start. | |
| 478 CountNonCleanMemRegionClosure count1(this); | |
| 479 ct_bs->mod_card_iterate(&count1); | |
| 480 int orig_count = count1.n(); | |
| 481 | |
| 482 // First clear the logged cards. | |
| 483 ClearLoggedCardTableEntryClosure clear; | |
| 484 dcqs.set_closure(&clear); | |
| 485 dcqs.apply_closure_to_all_completed_buffers(); | |
| 486 dcqs.iterate_closure_all_threads(false); | |
| 487 clear.print_histo(); | |
| 488 | |
| 489 // Now ensure that there's no dirty cards. | |
| 490 CountNonCleanMemRegionClosure count2(this); | |
| 491 ct_bs->mod_card_iterate(&count2); | |
| 492 if (count2.n() != 0) { | |
| 493 gclog_or_tty->print_cr("Card table has %d entries; %d originally", | |
| 494 count2.n(), orig_count); | |
| 495 } | |
| 496 guarantee(count2.n() == 0, "Card table should be clean."); | |
| 497 | |
| 498 RedirtyLoggedCardTableEntryClosure redirty; | |
| 499 JavaThread::dirty_card_queue_set().set_closure(&redirty); | |
| 500 dcqs.apply_closure_to_all_completed_buffers(); | |
| 501 dcqs.iterate_closure_all_threads(false); | |
| 502 gclog_or_tty->print_cr("Log entries = %d, dirty cards = %d.", | |
| 503 clear.calls(), orig_count); | |
| 504 guarantee(redirty.calls() == clear.calls(), | |
| 505 "Or else mechanism is broken."); | |
| 506 | |
| 507 CountNonCleanMemRegionClosure count3(this); | |
| 508 ct_bs->mod_card_iterate(&count3); | |
| 509 if (count3.n() != orig_count) { | |
| 510 gclog_or_tty->print_cr("Should have restored them all: orig = %d, final = %d.", | |
| 511 orig_count, count3.n()); | |
| 512 guarantee(count3.n() >= orig_count, "Should have restored them all."); | |
| 513 } | |
| 514 | |
| 515 JavaThread::dirty_card_queue_set().set_closure(_refine_cte_cl); | |
| 516 } | |
| 517 | |
| 518 // Private class members. | |
| 519 | |
| 520 G1CollectedHeap* G1CollectedHeap::_g1h; | |
| 521 | |
| 522 // Private methods. | |
| 523 | |
| 2152 | 524 HeapRegion* |
| 2361 | 525 G1CollectedHeap::new_region_try_secondary_free_list() { |
| 2152 | 526 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
| 527 while (!_secondary_free_list.is_empty() || free_regions_coming()) { | |
| 528 if (!_secondary_free_list.is_empty()) { | |
| 529 if (G1ConcRegionFreeingVerbose) { | |
| 530 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
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531 "secondary_free_list has %u entries", |
| 2152 | 532 _secondary_free_list.length()); |
| 533 } | |
| 534 // It looks as if there are free regions available on the | |
| 535 // secondary_free_list. Let's move them to the free_list and try | |
| 536 // again to allocate from it. | |
| 537 append_secondary_free_list(); | |
| 538 | |
| 539 assert(!_free_list.is_empty(), "if the secondary_free_list was not " | |
| 540 "empty we should have moved at least one entry to the free_list"); | |
| 541 HeapRegion* res = _free_list.remove_head(); | |
| 542 if (G1ConcRegionFreeingVerbose) { | |
| 543 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 544 "allocated "HR_FORMAT" from secondary_free_list", | |
| 545 HR_FORMAT_PARAMS(res)); | |
| 546 } | |
| 547 return res; | |
| 548 } | |
| 549 | |
| 550 // Wait here until we get notifed either when (a) there are no | |
| 551 // more free regions coming or (b) some regions have been moved on | |
| 552 // the secondary_free_list. | |
| 553 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
| 554 } | |
| 555 | |
| 556 if (G1ConcRegionFreeingVerbose) { | |
| 557 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 558 "could not allocate from secondary_free_list"); | |
| 559 } | |
| 560 return NULL; | |
| 561 } | |
| 562 | |
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563 HeapRegion* G1CollectedHeap::new_region(size_t word_size, bool do_expand) { |
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564 assert(!isHumongous(word_size) || word_size <= HeapRegion::GrainWords, |
| 2152 | 565 "the only time we use this to allocate a humongous region is " |
| 566 "when we are allocating a single humongous region"); | |
| 567 | |
| 568 HeapRegion* res; | |
| 569 if (G1StressConcRegionFreeing) { | |
| 570 if (!_secondary_free_list.is_empty()) { | |
| 571 if (G1ConcRegionFreeingVerbose) { | |
| 572 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 573 "forced to look at the secondary_free_list"); | |
| 574 } | |
| 2361 | 575 res = new_region_try_secondary_free_list(); |
| 2152 | 576 if (res != NULL) { |
| 577 return res; | |
| 578 } | |
| 579 } | |
| 580 } | |
| 581 res = _free_list.remove_head_or_null(); | |
| 582 if (res == NULL) { | |
| 583 if (G1ConcRegionFreeingVerbose) { | |
| 584 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 585 "res == NULL, trying the secondary_free_list"); | |
| 586 } | |
| 2361 | 587 res = new_region_try_secondary_free_list(); |
| 2152 | 588 } |
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589 if (res == NULL && do_expand && _expand_heap_after_alloc_failure) { |
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590 // Currently, only attempts to allocate GC alloc regions set |
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591 // do_expand to true. So, we should only reach here during a |
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592 // safepoint. If this assumption changes we might have to |
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593 // reconsider the use of _expand_heap_after_alloc_failure. |
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594 assert(SafepointSynchronize::is_at_safepoint(), "invariant"); |
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595 |
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596 ergo_verbose1(ErgoHeapSizing, |
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597 "attempt heap expansion", |
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598 ergo_format_reason("region allocation request failed") |
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599 ergo_format_byte("allocation request"), |
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600 word_size * HeapWordSize); |
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601 if (expand(word_size * HeapWordSize)) { |
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602 // Given that expand() succeeded in expanding the heap, and we |
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603 // always expand the heap by an amount aligned to the heap |
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604 // region size, the free list should in theory not be empty. So |
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605 // it would probably be OK to use remove_head(). But the extra |
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606 // check for NULL is unlikely to be a performance issue here (we |
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607 // just expanded the heap!) so let's just be conservative and |
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608 // use remove_head_or_null(). |
| 3766 | 609 res = _free_list.remove_head_or_null(); |
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610 } else { |
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611 _expand_heap_after_alloc_failure = false; |
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612 } |
| 342 | 613 } |
| 614 return res; | |
| 615 } | |
| 616 | |
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617 uint G1CollectedHeap::humongous_obj_allocate_find_first(uint num_regions, |
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618 size_t word_size) { |
| 2361 | 619 assert(isHumongous(word_size), "word_size should be humongous"); |
| 620 assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); | |
| 621 | |
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622 uint first = G1_NULL_HRS_INDEX; |
| 2152 | 623 if (num_regions == 1) { |
| 624 // Only one region to allocate, no need to go through the slower | |
| 625 // path. The caller will attempt the expasion if this fails, so | |
| 626 // let's not try to expand here too. | |
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627 HeapRegion* hr = new_region(word_size, false /* do_expand */); |
| 2152 | 628 if (hr != NULL) { |
| 629 first = hr->hrs_index(); | |
| 630 } else { | |
| 3766 | 631 first = G1_NULL_HRS_INDEX; |
| 2152 | 632 } |
| 633 } else { | |
| 634 // We can't allocate humongous regions while cleanupComplete() is | |
| 635 // running, since some of the regions we find to be empty might not | |
| 636 // yet be added to the free list and it is not straightforward to | |
| 637 // know which list they are on so that we can remove them. Note | |
| 638 // that we only need to do this if we need to allocate more than | |
| 639 // one region to satisfy the current humongous allocation | |
| 640 // request. If we are only allocating one region we use the common | |
| 641 // region allocation code (see above). | |
| 642 wait_while_free_regions_coming(); | |
| 2361 | 643 append_secondary_free_list_if_not_empty_with_lock(); |
| 2152 | 644 |
| 645 if (free_regions() >= num_regions) { | |
| 3766 | 646 first = _hrs.find_contiguous(num_regions); |
| 647 if (first != G1_NULL_HRS_INDEX) { | |
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648 for (uint i = first; i < first + num_regions; ++i) { |
| 3766 | 649 HeapRegion* hr = region_at(i); |
| 2152 | 650 assert(hr->is_empty(), "sanity"); |
| 2361 | 651 assert(is_on_master_free_list(hr), "sanity"); |
| 2152 | 652 hr->set_pending_removal(true); |
| 653 } | |
| 654 _free_list.remove_all_pending(num_regions); | |
| 655 } | |
| 656 } | |
| 657 } | |
| 658 return first; | |
| 659 } | |
| 660 | |
| 2361 | 661 HeapWord* |
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662 G1CollectedHeap::humongous_obj_allocate_initialize_regions(uint first, |
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663 uint num_regions, |
| 2361 | 664 size_t word_size) { |
| 3766 | 665 assert(first != G1_NULL_HRS_INDEX, "pre-condition"); |
| 2361 | 666 assert(isHumongous(word_size), "word_size should be humongous"); |
| 667 assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); | |
| 668 | |
| 669 // Index of last region in the series + 1. | |
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670 uint last = first + num_regions; |
| 2361 | 671 |
| 672 // We need to initialize the region(s) we just discovered. This is | |
| 673 // a bit tricky given that it can happen concurrently with | |
| 674 // refinement threads refining cards on these regions and | |
| 675 // potentially wanting to refine the BOT as they are scanning | |
| 676 // those cards (this can happen shortly after a cleanup; see CR | |
| 677 // 6991377). So we have to set up the region(s) carefully and in | |
| 678 // a specific order. | |
| 679 | |
| 680 // The word size sum of all the regions we will allocate. | |
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681 size_t word_size_sum = (size_t) num_regions * HeapRegion::GrainWords; |
| 2361 | 682 assert(word_size <= word_size_sum, "sanity"); |
| 683 | |
| 684 // This will be the "starts humongous" region. | |
| 3766 | 685 HeapRegion* first_hr = region_at(first); |
| 2361 | 686 // The header of the new object will be placed at the bottom of |
| 687 // the first region. | |
| 688 HeapWord* new_obj = first_hr->bottom(); | |
| 689 // This will be the new end of the first region in the series that | |
| 690 // should also match the end of the last region in the seriers. | |
| 691 HeapWord* new_end = new_obj + word_size_sum; | |
| 692 // This will be the new top of the first region that will reflect | |
| 693 // this allocation. | |
| 694 HeapWord* new_top = new_obj + word_size; | |
| 695 | |
| 696 // First, we need to zero the header of the space that we will be | |
| 697 // allocating. When we update top further down, some refinement | |
| 698 // threads might try to scan the region. By zeroing the header we | |
| 699 // ensure that any thread that will try to scan the region will | |
| 700 // come across the zero klass word and bail out. | |
| 701 // | |
| 702 // NOTE: It would not have been correct to have used | |
| 703 // CollectedHeap::fill_with_object() and make the space look like | |
| 704 // an int array. The thread that is doing the allocation will | |
| 705 // later update the object header to a potentially different array | |
| 706 // type and, for a very short period of time, the klass and length | |
| 707 // fields will be inconsistent. This could cause a refinement | |
| 708 // thread to calculate the object size incorrectly. | |
| 709 Copy::fill_to_words(new_obj, oopDesc::header_size(), 0); | |
| 710 | |
| 711 // We will set up the first region as "starts humongous". This | |
| 712 // will also update the BOT covering all the regions to reflect | |
| 713 // that there is a single object that starts at the bottom of the | |
| 714 // first region. | |
| 715 first_hr->set_startsHumongous(new_top, new_end); | |
| 716 | |
| 717 // Then, if there are any, we will set up the "continues | |
| 718 // humongous" regions. | |
| 719 HeapRegion* hr = NULL; | |
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720 for (uint i = first + 1; i < last; ++i) { |
| 3766 | 721 hr = region_at(i); |
| 2361 | 722 hr->set_continuesHumongous(first_hr); |
| 723 } | |
| 724 // If we have "continues humongous" regions (hr != NULL), then the | |
| 725 // end of the last one should match new_end. | |
| 726 assert(hr == NULL || hr->end() == new_end, "sanity"); | |
| 727 | |
| 728 // Up to this point no concurrent thread would have been able to | |
| 729 // do any scanning on any region in this series. All the top | |
| 730 // fields still point to bottom, so the intersection between | |
| 731 // [bottom,top] and [card_start,card_end] will be empty. Before we | |
| 732 // update the top fields, we'll do a storestore to make sure that | |
| 733 // no thread sees the update to top before the zeroing of the | |
| 734 // object header and the BOT initialization. | |
| 735 OrderAccess::storestore(); | |
| 736 | |
| 737 // Now that the BOT and the object header have been initialized, | |
| 738 // we can update top of the "starts humongous" region. | |
| 739 assert(first_hr->bottom() < new_top && new_top <= first_hr->end(), | |
| 740 "new_top should be in this region"); | |
| 741 first_hr->set_top(new_top); | |
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742 if (_hr_printer.is_active()) { |
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743 HeapWord* bottom = first_hr->bottom(); |
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744 HeapWord* end = first_hr->orig_end(); |
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745 if ((first + 1) == last) { |
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746 // the series has a single humongous region |
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747 _hr_printer.alloc(G1HRPrinter::SingleHumongous, first_hr, new_top); |
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748 } else { |
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749 // the series has more than one humongous regions |
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750 _hr_printer.alloc(G1HRPrinter::StartsHumongous, first_hr, end); |
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751 } |
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752 } |
| 2361 | 753 |
| 754 // Now, we will update the top fields of the "continues humongous" | |
| 755 // regions. The reason we need to do this is that, otherwise, | |
| 756 // these regions would look empty and this will confuse parts of | |
| 757 // G1. For example, the code that looks for a consecutive number | |
| 758 // of empty regions will consider them empty and try to | |
| 759 // re-allocate them. We can extend is_empty() to also include | |
| 760 // !continuesHumongous(), but it is easier to just update the top | |
| 761 // fields here. The way we set top for all regions (i.e., top == | |
| 762 // end for all regions but the last one, top == new_top for the | |
| 763 // last one) is actually used when we will free up the humongous | |
| 764 // region in free_humongous_region(). | |
| 765 hr = NULL; | |
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766 for (uint i = first + 1; i < last; ++i) { |
| 3766 | 767 hr = region_at(i); |
| 2361 | 768 if ((i + 1) == last) { |
| 769 // last continues humongous region | |
| 770 assert(hr->bottom() < new_top && new_top <= hr->end(), | |
| 771 "new_top should fall on this region"); | |
| 772 hr->set_top(new_top); | |
|
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773 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, new_top); |
| 2361 | 774 } else { |
| 775 // not last one | |
| 776 assert(new_top > hr->end(), "new_top should be above this region"); | |
| 777 hr->set_top(hr->end()); | |
|
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778 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, hr->end()); |
| 2361 | 779 } |
| 780 } | |
| 781 // If we have continues humongous regions (hr != NULL), then the | |
| 782 // end of the last one should match new_end and its top should | |
| 783 // match new_top. | |
| 784 assert(hr == NULL || | |
| 785 (hr->end() == new_end && hr->top() == new_top), "sanity"); | |
| 786 | |
| 787 assert(first_hr->used() == word_size * HeapWordSize, "invariant"); | |
| 788 _summary_bytes_used += first_hr->used(); | |
| 789 _humongous_set.add(first_hr); | |
| 790 | |
| 791 return new_obj; | |
| 792 } | |
| 793 | |
| 342 | 794 // If could fit into free regions w/o expansion, try. |
| 795 // Otherwise, if can expand, do so. | |
| 796 // Otherwise, if using ex regions might help, try with ex given back. | |
| 1973 | 797 HeapWord* G1CollectedHeap::humongous_obj_allocate(size_t word_size) { |
| 2152 | 798 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
| 799 | |
| 800 verify_region_sets_optional(); | |
| 342 | 801 |
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802 size_t word_size_rounded = round_to(word_size, HeapRegion::GrainWords); |
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803 uint num_regions = (uint) (word_size_rounded / HeapRegion::GrainWords); |
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804 uint x_num = expansion_regions(); |
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805 uint fs = _hrs.free_suffix(); |
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806 uint first = humongous_obj_allocate_find_first(num_regions, word_size); |
| 3766 | 807 if (first == G1_NULL_HRS_INDEX) { |
| 2152 | 808 // The only thing we can do now is attempt expansion. |
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809 if (fs + x_num >= num_regions) { |
|
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810 // If the number of regions we're trying to allocate for this |
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811 // object is at most the number of regions in the free suffix, |
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812 // then the call to humongous_obj_allocate_find_first() above |
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813 // should have succeeded and we wouldn't be here. |
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814 // |
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815 // We should only be trying to expand when the free suffix is |
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816 // not sufficient for the object _and_ we have some expansion |
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817 // room available. |
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818 assert(num_regions > fs, "earlier allocation should have succeeded"); |
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819 |
|
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820 ergo_verbose1(ErgoHeapSizing, |
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821 "attempt heap expansion", |
|
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822 ergo_format_reason("humongous allocation request failed") |
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823 ergo_format_byte("allocation request"), |
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824 word_size * HeapWordSize); |
|
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825 if (expand((num_regions - fs) * HeapRegion::GrainBytes)) { |
| 3766 | 826 // Even though the heap was expanded, it might not have |
| 827 // reached the desired size. So, we cannot assume that the | |
| 828 // allocation will succeed. | |
|
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829 first = humongous_obj_allocate_find_first(num_regions, word_size); |
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830 } |
| 2152 | 831 } |
| 832 } | |
| 833 | |
| 2361 | 834 HeapWord* result = NULL; |
| 3766 | 835 if (first != G1_NULL_HRS_INDEX) { |
| 2361 | 836 result = |
| 837 humongous_obj_allocate_initialize_regions(first, num_regions, word_size); | |
| 838 assert(result != NULL, "it should always return a valid result"); | |
|
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839 |
|
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|
840 // A successful humongous object allocation changes the used space |
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841 // information of the old generation so we need to recalculate the |
|
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842 // sizes and update the jstat counters here. |
|
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|
843 g1mm()->update_sizes(); |
| 2152 | 844 } |
| 845 | |
| 846 verify_region_sets_optional(); | |
| 2361 | 847 |
| 848 return result; | |
| 342 | 849 } |
| 850 | |
| 1973 | 851 HeapWord* G1CollectedHeap::allocate_new_tlab(size_t word_size) { |
| 852 assert_heap_not_locked_and_not_at_safepoint(); | |
|
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853 assert(!isHumongous(word_size), "we do not allow humongous TLABs"); |
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854 |
|
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855 unsigned int dummy_gc_count_before; |
|
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|
856 return attempt_allocation(word_size, &dummy_gc_count_before); |
| 342 | 857 } |
| 858 | |
| 859 HeapWord* | |
| 860 G1CollectedHeap::mem_allocate(size_t word_size, | |
| 1973 | 861 bool* gc_overhead_limit_was_exceeded) { |
| 862 assert_heap_not_locked_and_not_at_safepoint(); | |
| 342 | 863 |
|
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|
864 // Loop until the allocation is satisified, or unsatisfied after GC. |
| 1973 | 865 for (int try_count = 1; /* we'll return */; try_count += 1) { |
| 866 unsigned int gc_count_before; | |
|
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|
867 |
|
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|
868 HeapWord* result = NULL; |
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869 if (!isHumongous(word_size)) { |
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870 result = attempt_allocation(word_size, &gc_count_before); |
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871 } else { |
|
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|
872 result = attempt_allocation_humongous(word_size, &gc_count_before); |
|
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|
873 } |
|
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|
874 if (result != NULL) { |
|
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|
875 return result; |
| 342 | 876 } |
| 877 | |
| 878 // Create the garbage collection operation... | |
| 1973 | 879 VM_G1CollectForAllocation op(gc_count_before, word_size); |
| 342 | 880 // ...and get the VM thread to execute it. |
| 881 VMThread::execute(&op); | |
| 1973 | 882 |
| 883 if (op.prologue_succeeded() && op.pause_succeeded()) { | |
| 884 // If the operation was successful we'll return the result even | |
| 885 // if it is NULL. If the allocation attempt failed immediately | |
| 886 // after a Full GC, it's unlikely we'll be able to allocate now. | |
| 887 HeapWord* result = op.result(); | |
| 888 if (result != NULL && !isHumongous(word_size)) { | |
| 889 // Allocations that take place on VM operations do not do any | |
| 890 // card dirtying and we have to do it here. We only have to do | |
| 891 // this for non-humongous allocations, though. | |
| 892 dirty_young_block(result, word_size); | |
| 893 } | |
| 342 | 894 return result; |
| 1973 | 895 } else { |
| 896 assert(op.result() == NULL, | |
| 897 "the result should be NULL if the VM op did not succeed"); | |
| 342 | 898 } |
| 899 | |
| 900 // Give a warning if we seem to be looping forever. | |
| 901 if ((QueuedAllocationWarningCount > 0) && | |
| 902 (try_count % QueuedAllocationWarningCount == 0)) { | |
| 1973 | 903 warning("G1CollectedHeap::mem_allocate retries %d times", try_count); |
| 342 | 904 } |
| 905 } | |
| 1973 | 906 |
| 907 ShouldNotReachHere(); | |
|
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|
908 return NULL; |
| 342 | 909 } |
| 910 | |
|
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|
911 HeapWord* G1CollectedHeap::attempt_allocation_slow(size_t word_size, |
|
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|
912 unsigned int *gc_count_before_ret) { |
|
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|
913 // Make sure you read the note in attempt_allocation_humongous(). |
|
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|
914 |
|
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|
915 assert_heap_not_locked_and_not_at_safepoint(); |
|
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|
916 assert(!isHumongous(word_size), "attempt_allocation_slow() should not " |
|
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|
917 "be called for humongous allocation requests"); |
|
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|
918 |
|
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|
919 // We should only get here after the first-level allocation attempt |
|
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|
920 // (attempt_allocation()) failed to allocate. |
|
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|
921 |
|
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|
922 // We will loop until a) we manage to successfully perform the |
|
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|
923 // allocation or b) we successfully schedule a collection which |
|
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|
924 // fails to perform the allocation. b) is the only case when we'll |
|
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|
925 // return NULL. |
|
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|
926 HeapWord* result = NULL; |
|
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|
927 for (int try_count = 1; /* we'll return */; try_count += 1) { |
|
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|
928 bool should_try_gc; |
|
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|
929 unsigned int gc_count_before; |
|
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|
930 |
|
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|
931 { |
|
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|
932 MutexLockerEx x(Heap_lock); |
|
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|
933 |
|
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|
934 result = _mutator_alloc_region.attempt_allocation_locked(word_size, |
|
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|
935 false /* bot_updates */); |
|
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|
936 if (result != NULL) { |
|
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|
937 return result; |
|
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|
938 } |
|
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|
939 |
|
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|
940 // If we reach here, attempt_allocation_locked() above failed to |
|
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|
941 // allocate a new region. So the mutator alloc region should be NULL. |
|
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|
942 assert(_mutator_alloc_region.get() == NULL, "only way to get here"); |
|
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|
943 |
|
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|
944 if (GC_locker::is_active_and_needs_gc()) { |
|
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|
945 if (g1_policy()->can_expand_young_list()) { |
|
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|
946 // No need for an ergo verbose message here, |
|
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|
947 // can_expand_young_list() does this when it returns true. |
|
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|
948 result = _mutator_alloc_region.attempt_allocation_force(word_size, |
|
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|
949 false /* bot_updates */); |
|
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|
950 if (result != NULL) { |
|
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|
951 return result; |
|
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|
952 } |
|
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|
953 } |
|
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|
954 should_try_gc = false; |
|
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|
955 } else { |
|
6106
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|
956 // The GCLocker may not be active but the GCLocker initiated |
|
1d478c993020
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|
957 // GC may not yet have been performed (GCLocker::needs_gc() |
|
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7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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|
958 // returns true). In this case we do not try this GC and |
|
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7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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|
959 // wait until the GCLocker initiated GC is performed, and |
|
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|
960 // then retry the allocation. |
|
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|
961 if (GC_locker::needs_gc()) { |
|
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|
962 should_try_gc = false; |
|
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|
963 } else { |
|
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|
964 // Read the GC count while still holding the Heap_lock. |
|
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|
965 gc_count_before = total_collections(); |
|
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|
966 should_try_gc = true; |
|
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|
967 } |
|
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|
968 } |
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|
969 } |
|
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|
970 |
|
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|
971 if (should_try_gc) { |
|
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972 bool succeeded; |
|
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973 result = do_collection_pause(word_size, gc_count_before, &succeeded); |
|
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974 if (result != NULL) { |
|
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975 assert(succeeded, "only way to get back a non-NULL result"); |
|
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|
976 return result; |
|
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|
977 } |
|
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|
978 |
|
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|
979 if (succeeded) { |
|
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980 // If we get here we successfully scheduled a collection which |
|
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981 // failed to allocate. No point in trying to allocate |
|
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982 // further. We'll just return NULL. |
|
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|
983 MutexLockerEx x(Heap_lock); |
|
4910
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984 *gc_count_before_ret = total_collections(); |
|
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985 return NULL; |
|
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|
986 } |
|
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987 } else { |
|
6106
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|
988 // The GCLocker is either active or the GCLocker initiated |
|
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989 // GC has not yet been performed. Stall until it is and |
|
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990 // then retry the allocation. |
|
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|
991 GC_locker::stall_until_clear(); |
|
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992 } |
|
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|
993 |
|
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|
994 // We can reach here if we were unsuccessul in scheduling a |
|
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995 // collection (because another thread beat us to it) or if we were |
|
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996 // stalled due to the GC locker. In either can we should retry the |
|
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|
997 // allocation attempt in case another thread successfully |
|
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|
998 // performed a collection and reclaimed enough space. We do the |
|
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|
999 // first attempt (without holding the Heap_lock) here and the |
|
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|
1000 // follow-on attempt will be at the start of the next loop |
|
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1001 // iteration (after taking the Heap_lock). |
|
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|
1002 result = _mutator_alloc_region.attempt_allocation(word_size, |
|
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1003 false /* bot_updates */); |
|
5963
64bf7c8270cb
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4912
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|
1004 if (result != NULL) { |
|
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|
1005 return result; |
|
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|
1006 } |
|
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|
1007 |
|
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|
1008 // Give a warning if we seem to be looping forever. |
|
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1009 if ((QueuedAllocationWarningCount > 0) && |
|
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1010 (try_count % QueuedAllocationWarningCount == 0)) { |
|
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1011 warning("G1CollectedHeap::attempt_allocation_slow() " |
|
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1012 "retries %d times", try_count); |
|
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1013 } |
|
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1014 } |
|
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|
1015 |
|
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|
1016 ShouldNotReachHere(); |
|
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|
1017 return NULL; |
|
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|
1018 } |
|
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|
1019 |
|
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|
1020 HeapWord* G1CollectedHeap::attempt_allocation_humongous(size_t word_size, |
|
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|
1021 unsigned int * gc_count_before_ret) { |
|
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1022 // The structure of this method has a lot of similarities to |
|
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|
1023 // attempt_allocation_slow(). The reason these two were not merged |
|
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|
1024 // into a single one is that such a method would require several "if |
|
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|
1025 // allocation is not humongous do this, otherwise do that" |
|
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|
1026 // conditional paths which would obscure its flow. In fact, an early |
|
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|
1027 // version of this code did use a unified method which was harder to |
|
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|
1028 // follow and, as a result, it had subtle bugs that were hard to |
|
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|
1029 // track down. So keeping these two methods separate allows each to |
|
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|
1030 // be more readable. It will be good to keep these two in sync as |
|
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|
1031 // much as possible. |
|
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|
1032 |
|
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|
1033 assert_heap_not_locked_and_not_at_safepoint(); |
|
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|
1034 assert(isHumongous(word_size), "attempt_allocation_humongous() " |
|
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|
1035 "should only be called for humongous allocations"); |
|
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|
1036 |
|
4834
6a78aa6ac1ff
7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
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|
1037 // Humongous objects can exhaust the heap quickly, so we should check if we |
|
6a78aa6ac1ff
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diff
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|
1038 // need to start a marking cycle at each humongous object allocation. We do |
|
6a78aa6ac1ff
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|
1039 // the check before we do the actual allocation. The reason for doing it |
|
6a78aa6ac1ff
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|
1040 // before the allocation is that we avoid having to keep track of the newly |
|
6a78aa6ac1ff
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|
1041 // allocated memory while we do a GC. |
|
4910
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|
1042 if (g1_policy()->need_to_start_conc_mark("concurrent humongous allocation", |
|
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|
1043 word_size)) { |
|
4834
6a78aa6ac1ff
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|
1044 collect(GCCause::_g1_humongous_allocation); |
|
6a78aa6ac1ff
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|
1045 } |
|
6a78aa6ac1ff
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|
1046 |
|
2433
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|
1047 // We will loop until a) we manage to successfully perform the |
|
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|
1048 // allocation or b) we successfully schedule a collection which |
|
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|
1049 // fails to perform the allocation. b) is the only case when we'll |
|
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|
1050 // return NULL. |
|
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|
1051 HeapWord* result = NULL; |
|
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|
1052 for (int try_count = 1; /* we'll return */; try_count += 1) { |
|
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|
1053 bool should_try_gc; |
|
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|
1054 unsigned int gc_count_before; |
|
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|
1055 |
|
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|
1056 { |
|
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|
1057 MutexLockerEx x(Heap_lock); |
|
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|
1058 |
|
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|
1059 // Given that humongous objects are not allocated in young |
|
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|
1060 // regions, we'll first try to do the allocation without doing a |
|
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|
1061 // collection hoping that there's enough space in the heap. |
|
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|
1062 result = humongous_obj_allocate(word_size); |
|
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diff
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|
1063 if (result != NULL) { |
|
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diff
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|
1064 return result; |
|
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diff
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|
1065 } |
|
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|
1066 |
|
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|
1067 if (GC_locker::is_active_and_needs_gc()) { |
|
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|
1068 should_try_gc = false; |
|
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|
1069 } else { |
|
6106
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|
1070 // The GCLocker may not be active but the GCLocker initiated |
|
1d478c993020
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diff
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|
1071 // GC may not yet have been performed (GCLocker::needs_gc() |
|
1d478c993020
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|
1072 // returns true). In this case we do not try this GC and |
|
1d478c993020
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6064
diff
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|
1073 // wait until the GCLocker initiated GC is performed, and |
|
1d478c993020
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|
1074 // then retry the allocation. |
|
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1075 if (GC_locker::needs_gc()) { |
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1076 should_try_gc = false; |
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1077 } else { |
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1078 // Read the GC count while still holding the Heap_lock. |
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1079 gc_count_before = total_collections(); |
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1080 should_try_gc = true; |
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1081 } |
|
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1082 } |
|
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1083 } |
|
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1084 |
|
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1085 if (should_try_gc) { |
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1086 // If we failed to allocate the humongous object, we should try to |
|
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1087 // do a collection pause (if we're allowed) in case it reclaims |
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1088 // enough space for the allocation to succeed after the pause. |
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1089 |
|
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1090 bool succeeded; |
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1091 result = do_collection_pause(word_size, gc_count_before, &succeeded); |
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1092 if (result != NULL) { |
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1093 assert(succeeded, "only way to get back a non-NULL result"); |
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1094 return result; |
|
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1095 } |
|
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1096 |
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1097 if (succeeded) { |
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1098 // If we get here we successfully scheduled a collection which |
|
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1099 // failed to allocate. No point in trying to allocate |
|
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1100 // further. We'll just return NULL. |
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1101 MutexLockerEx x(Heap_lock); |
|
4910
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1102 *gc_count_before_ret = total_collections(); |
|
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1103 return NULL; |
|
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1104 } |
|
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1105 } else { |
|
6106
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1106 // The GCLocker is either active or the GCLocker initiated |
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1107 // GC has not yet been performed. Stall until it is and |
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1108 // then retry the allocation. |
|
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1109 GC_locker::stall_until_clear(); |
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1110 } |
|
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1111 |
|
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1112 // We can reach here if we were unsuccessul in scheduling a |
|
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1113 // collection (because another thread beat us to it) or if we were |
|
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1114 // stalled due to the GC locker. In either can we should retry the |
|
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1115 // allocation attempt in case another thread successfully |
|
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1116 // performed a collection and reclaimed enough space. Give a |
|
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1117 // warning if we seem to be looping forever. |
|
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1118 |
|
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1119 if ((QueuedAllocationWarningCount > 0) && |
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1120 (try_count % QueuedAllocationWarningCount == 0)) { |
|
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1121 warning("G1CollectedHeap::attempt_allocation_humongous() " |
|
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1122 "retries %d times", try_count); |
|
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1123 } |
|
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1124 } |
|
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1125 |
|
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|
1126 ShouldNotReachHere(); |
|
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1127 return NULL; |
|
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1128 } |
|
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1129 |
|
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1130 HeapWord* G1CollectedHeap::attempt_allocation_at_safepoint(size_t word_size, |
|
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1131 bool expect_null_mutator_alloc_region) { |
| 2152 | 1132 assert_at_safepoint(true /* should_be_vm_thread */); |
|
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1133 assert(_mutator_alloc_region.get() == NULL || |
|
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1134 !expect_null_mutator_alloc_region, |
|
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1135 "the current alloc region was unexpectedly found to be non-NULL"); |
|
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1136 |
|
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1137 if (!isHumongous(word_size)) { |
|
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1138 return _mutator_alloc_region.attempt_allocation_locked(word_size, |
|
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1139 false /* bot_updates */); |
|
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1140 } else { |
|
4829
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|
1141 HeapWord* result = humongous_obj_allocate(word_size); |
|
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1142 if (result != NULL && g1_policy()->need_to_start_conc_mark("STW humongous allocation")) { |
|
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|
1143 g1_policy()->set_initiate_conc_mark_if_possible(); |
|
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|
1144 } |
|
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|
1145 return result; |
|
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|
1146 } |
|
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|
1147 |
|
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|
1148 ShouldNotReachHere(); |
| 342 | 1149 } |
| 1150 | |
| 1151 class PostMCRemSetClearClosure: public HeapRegionClosure { | |
|
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1152 G1CollectedHeap* _g1h; |
| 342 | 1153 ModRefBarrierSet* _mr_bs; |
| 1154 public: | |
|
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1155 PostMCRemSetClearClosure(G1CollectedHeap* g1h, ModRefBarrierSet* mr_bs) : |
|
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1156 _g1h(g1h), _mr_bs(mr_bs) { } |
| 342 | 1157 bool doHeapRegion(HeapRegion* r) { |
|
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1158 if (r->continuesHumongous()) { |
| 342 | 1159 return false; |
|
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1160 } |
|
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|
1161 _g1h->reset_gc_time_stamps(r); |
| 342 | 1162 HeapRegionRemSet* hrrs = r->rem_set(); |
| 1163 if (hrrs != NULL) hrrs->clear(); | |
| 1164 // You might think here that we could clear just the cards | |
| 1165 // corresponding to the used region. But no: if we leave a dirty card | |
| 1166 // in a region we might allocate into, then it would prevent that card | |
| 1167 // from being enqueued, and cause it to be missed. | |
| 1168 // Re: the performance cost: we shouldn't be doing full GC anyway! | |
| 1169 _mr_bs->clear(MemRegion(r->bottom(), r->end())); | |
| 1170 return false; | |
| 1171 } | |
| 1172 }; | |
| 1173 | |
|
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1174 void G1CollectedHeap::clear_rsets_post_compaction() { |
|
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1175 PostMCRemSetClearClosure rs_clear(this, mr_bs()); |
|
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1176 heap_region_iterate(&rs_clear); |
|
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1177 } |
| 342 | 1178 |
|
626
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1179 class RebuildRSOutOfRegionClosure: public HeapRegionClosure { |
|
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1180 G1CollectedHeap* _g1h; |
|
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1181 UpdateRSOopClosure _cl; |
|
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|
1182 int _worker_i; |
|
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1183 public: |
|
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|
1184 RebuildRSOutOfRegionClosure(G1CollectedHeap* g1, int worker_i = 0) : |
| 1861 | 1185 _cl(g1->g1_rem_set(), worker_i), |
|
626
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1186 _worker_i(worker_i), |
|
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|
1187 _g1h(g1) |
|
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|
1188 { } |
|
1960
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|
1189 |
|
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1190 bool doHeapRegion(HeapRegion* r) { |
|
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1191 if (!r->continuesHumongous()) { |
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1192 _cl.set_from(r); |
|
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1193 r->oop_iterate(&_cl); |
|
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1194 } |
|
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|
1195 return false; |
|
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|
1196 } |
|
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1197 }; |
|
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1198 |
|
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1199 class ParRebuildRSTask: public AbstractGangTask { |
|
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1200 G1CollectedHeap* _g1; |
|
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1201 public: |
|
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|
1202 ParRebuildRSTask(G1CollectedHeap* g1) |
|
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1203 : AbstractGangTask("ParRebuildRSTask"), |
|
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1204 _g1(g1) |
|
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1205 { } |
|
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1206 |
|
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1207 void work(uint worker_id) { |
|
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|
1208 RebuildRSOutOfRegionClosure rebuild_rs(_g1, worker_id); |
|
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|
1209 _g1->heap_region_par_iterate_chunked(&rebuild_rs, worker_id, |
|
4095
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1210 _g1->workers()->active_workers(), |
|
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1211 HeapRegion::RebuildRSClaimValue); |
|
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1212 } |
|
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1213 }; |
|
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1214 |
|
3778
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parents:
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changeset
|
1215 class PostCompactionPrinterClosure: public HeapRegionClosure { |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
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parents:
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|
1216 private: |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
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|
1217 G1HRPrinter* _hr_printer; |
|
5f6f2615433a
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parents:
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|
1218 public: |
|
5f6f2615433a
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changeset
|
1219 bool doHeapRegion(HeapRegion* hr) { |
|
5f6f2615433a
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parents:
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|
1220 assert(!hr->is_young(), "not expecting to find young regions"); |
|
5f6f2615433a
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|
1221 // We only generate output for non-empty regions. |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
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|
1222 if (!hr->is_empty()) { |
|
5f6f2615433a
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parents:
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changeset
|
1223 if (!hr->isHumongous()) { |
|
5f6f2615433a
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parents:
3777
diff
changeset
|
1224 _hr_printer->post_compaction(hr, G1HRPrinter::Old); |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
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parents:
3777
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|
1225 } else if (hr->startsHumongous()) { |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1226 if (hr->region_num() == 1) { |
|
3778
5f6f2615433a
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parents:
3777
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changeset
|
1227 // single humongous region |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
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parents:
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|
1228 _hr_printer->post_compaction(hr, G1HRPrinter::SingleHumongous); |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
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parents:
3777
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changeset
|
1229 } else { |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
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parents:
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|
1230 _hr_printer->post_compaction(hr, G1HRPrinter::StartsHumongous); |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1231 } |
|
5f6f2615433a
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parents:
3777
diff
changeset
|
1232 } else { |
|
5f6f2615433a
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parents:
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changeset
|
1233 assert(hr->continuesHumongous(), "only way to get here"); |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
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parents:
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|
1234 _hr_printer->post_compaction(hr, G1HRPrinter::ContinuesHumongous); |
|
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parents:
3777
diff
changeset
|
1235 } |
|
5f6f2615433a
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parents:
3777
diff
changeset
|
1236 } |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
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parents:
3777
diff
changeset
|
1237 return false; |
|
5f6f2615433a
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parents:
3777
diff
changeset
|
1238 } |
|
5f6f2615433a
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parents:
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changeset
|
1239 |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
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parents:
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changeset
|
1240 PostCompactionPrinterClosure(G1HRPrinter* hr_printer) |
|
5f6f2615433a
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|
1241 : _hr_printer(hr_printer) { } |
|
5f6f2615433a
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parents:
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changeset
|
1242 }; |
|
5f6f2615433a
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parents:
3777
diff
changeset
|
1243 |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
diff
changeset
|
1244 void G1CollectedHeap::print_hrs_post_compaction() { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
diff
changeset
|
1245 PostCompactionPrinterClosure cl(hr_printer()); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
diff
changeset
|
1246 heap_region_iterate(&cl); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1247 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
1248 |
| 1973 | 1249 bool G1CollectedHeap::do_collection(bool explicit_gc, |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1250 bool clear_all_soft_refs, |
| 342 | 1251 size_t word_size) { |
| 2152 | 1252 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1253 | |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
1254 if (GC_locker::check_active_before_gc()) { |
| 1973 | 1255 return false; |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
1256 } |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
1257 |
|
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2039
diff
changeset
|
1258 SvcGCMarker sgcm(SvcGCMarker::FULL); |
| 342 | 1259 ResourceMark rm; |
| 1260 | |
|
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4787
diff
changeset
|
1261 print_heap_before_gc(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
1262 |
| 4072 | 1263 HRSPhaseSetter x(HRSPhaseFullGC); |
| 2152 | 1264 verify_region_sets_optional(); |
| 342 | 1265 |
|
1387
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1360
diff
changeset
|
1266 const bool do_clear_all_soft_refs = clear_all_soft_refs || |
|
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1360
diff
changeset
|
1267 collector_policy()->should_clear_all_soft_refs(); |
|
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1360
diff
changeset
|
1268 |
|
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1360
diff
changeset
|
1269 ClearedAllSoftRefs casr(do_clear_all_soft_refs, collector_policy()); |
|
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
jmasa
parents:
1360
diff
changeset
|
1270 |
| 342 | 1271 { |
| 1272 IsGCActiveMark x; | |
| 1273 | |
| 1274 // Timing | |
| 6030 | 1275 assert(gc_cause() != GCCause::_java_lang_system_gc || explicit_gc, "invariant"); |
|
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
1276 gclog_or_tty->date_stamp(G1Log::fine() && PrintGCDateStamps); |
|
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
1277 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
| 6030 | 1278 |
|
6064
9d679effd28c
7166894: Add gc cause to GC logging for all collectors
brutisso
parents:
6059
diff
changeset
|
1279 TraceTime t(GCCauseString("Full GC", gc_cause()), G1Log::fine(), true, gclog_or_tty); |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
1280 TraceCollectorStats tcs(g1mm()->full_collection_counters()); |
|
3356
78542e2b5e35
7036199: Adding a notification to the implementation of GarbageCollectorMXBeans
fparain
parents:
3323
diff
changeset
|
1281 TraceMemoryManagerStats tms(true /* fullGC */, gc_cause()); |
|
1089
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
tonyp
parents:
1088
diff
changeset
|
1282 |
| 342 | 1283 double start = os::elapsedTime(); |
| 1284 g1_policy()->record_full_collection_start(); | |
| 1285 | |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1286 // Note: When we have a more flexible GC logging framework that |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1287 // allows us to add optional attributes to a GC log record we |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1288 // could consider timing and reporting how long we wait in the |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1289 // following two methods. |
| 2152 | 1290 wait_while_free_regions_coming(); |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1291 // If we start the compaction before the CM threads finish |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1292 // scanning the root regions we might trip them over as we'll |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1293 // be moving objects / updating references. So let's wait until |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1294 // they are done. By telling them to abort, they should complete |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1295 // early. |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1296 _cm->root_regions()->abort(); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1297 _cm->root_regions()->wait_until_scan_finished(); |
| 2361 | 1298 append_secondary_free_list_if_not_empty_with_lock(); |
| 2152 | 1299 |
| 342 | 1300 gc_prologue(true); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
1301 increment_total_collections(true /* full gc */); |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
1302 increment_old_marking_cycles_started(); |
| 342 | 1303 |
| 1304 size_t g1h_prev_used = used(); | |
| 1305 assert(used() == recalculate_used(), "Should be equal"); | |
| 1306 | |
| 1307 if (VerifyBeforeGC && total_collections() >= VerifyGCStartAt) { | |
| 1308 HandleMark hm; // Discard invalid handles created during verification | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1309 gclog_or_tty->print(" VerifyBeforeGC:"); |
| 342 | 1310 prepare_for_verify(); |
| 6008 | 1311 Universe::verify(/* silent */ false, |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
1312 /* option */ VerifyOption_G1UsePrevMarking); |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
1313 |
| 342 | 1314 } |
|
3869
7f776886a215
6810861: G1: support -XX:+{PrintClassHistogram,HeapDump}{Before,After}FullGC
ysr
parents:
3867
diff
changeset
|
1315 pre_full_gc_dump(); |
| 342 | 1316 |
| 1317 COMPILER2_PRESENT(DerivedPointerTable::clear()); | |
| 1318 | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1319 // Disable discovery and empty the discovered lists |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1320 // for the CM ref processor. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1321 ref_processor_cm()->disable_discovery(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1322 ref_processor_cm()->abandon_partial_discovery(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1323 ref_processor_cm()->verify_no_references_recorded(); |
| 342 | 1324 |
| 1325 // Abandon current iterations of concurrent marking and concurrent | |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1326 // refinement, if any are in progress. We have to do this before |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1327 // wait_until_scan_finished() below. |
| 342 | 1328 concurrent_mark()->abort(); |
| 1329 | |
| 1330 // Make sure we'll choose a new allocation region afterwards. | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1331 release_mutator_alloc_region(); |
| 636 | 1332 abandon_gc_alloc_regions(); |
| 1861 | 1333 g1_rem_set()->cleanupHRRS(); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1334 |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1335 // We should call this after we retire any currently active alloc |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1336 // regions so that all the ALLOC / RETIRE events are generated |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
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parents:
3777
diff
changeset
|
1337 // before the start GC event. |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
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parents:
3777
diff
changeset
|
1338 _hr_printer.start_gc(true /* full */, (size_t) total_collections()); |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1339 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1340 // We may have added regions to the current incremental collection |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1341 // set between the last GC or pause and now. We need to clear the |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1342 // incremental collection set and then start rebuilding it afresh |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1343 // after this full GC. |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1344 abandon_collection_set(g1_policy()->inc_cset_head()); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1345 g1_policy()->clear_incremental_cset(); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1346 g1_policy()->stop_incremental_cset_building(); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1347 |
| 4072 | 1348 tear_down_region_sets(false /* free_list_only */); |
| 4710 | 1349 g1_policy()->set_gcs_are_young(true); |
| 342 | 1350 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1351 // See the comments in g1CollectedHeap.hpp and |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1352 // G1CollectedHeap::ref_processing_init() about |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
1353 // how reference processing currently works in G1. |
|
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
1354 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1355 // Temporarily make discovery by the STW ref processor single threaded (non-MT). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1356 ReferenceProcessorMTDiscoveryMutator stw_rp_disc_ser(ref_processor_stw(), false); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1357 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1358 // Temporarily clear the STW ref processor's _is_alive_non_header field. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1359 ReferenceProcessorIsAliveMutator stw_rp_is_alive_null(ref_processor_stw(), NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
1360 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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|
1361 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, true /*verify_no_refs*/); |
|
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|
1362 ref_processor_stw()->setup_policy(do_clear_all_soft_refs); |
|
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|
1363 |
| 342 | 1364 // Do collection work |
| 1365 { | |
| 1366 HandleMark hm; // Discard invalid handles created during gc | |
|
3979
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|
1367 G1MarkSweep::invoke_at_safepoint(ref_processor_stw(), do_clear_all_soft_refs); |
| 342 | 1368 } |
|
3979
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|
1369 |
| 2152 | 1370 assert(free_regions() == 0, "we should not have added any free regions"); |
| 4072 | 1371 rebuild_region_sets(false /* free_list_only */); |
| 342 | 1372 |
|
3979
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|
1373 // Enqueue any discovered reference objects that have |
|
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|
1374 // not been removed from the discovered lists. |
|
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|
1375 ref_processor_stw()->enqueue_discovered_references(); |
| 342 | 1376 |
| 1377 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); | |
| 1378 | |
|
1089
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
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|
1379 MemoryService::track_memory_usage(); |
|
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
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|
1380 |
| 342 | 1381 if (VerifyAfterGC && total_collections() >= VerifyGCStartAt) { |
| 1382 HandleMark hm; // Discard invalid handles created during verification | |
| 1383 gclog_or_tty->print(" VerifyAfterGC:"); | |
|
637
25e146966e7c
6817419: G1: Enable extensive verification for humongous regions
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diff
changeset
|
1384 prepare_for_verify(); |
| 6008 | 1385 Universe::verify(/* silent */ false, |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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diff
changeset
|
1386 /* option */ VerifyOption_G1UsePrevMarking); |
|
6747fd0512e0
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|
1387 |
| 342 | 1388 } |
|
3979
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|
1389 |
|
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|
1390 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
|
4dfb2df418f2
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|
1391 ref_processor_stw()->verify_no_references_recorded(); |
|
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|
1392 |
|
4dfb2df418f2
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changeset
|
1393 // Note: since we've just done a full GC, concurrent |
|
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|
1394 // marking is no longer active. Therefore we need not |
|
4dfb2df418f2
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changeset
|
1395 // re-enable reference discovery for the CM ref processor. |
|
4dfb2df418f2
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changeset
|
1396 // That will be done at the start of the next marking cycle. |
|
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|
1397 assert(!ref_processor_cm()->discovery_enabled(), "Postcondition"); |
|
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changeset
|
1398 ref_processor_cm()->verify_no_references_recorded(); |
| 342 | 1399 |
| 1400 reset_gc_time_stamp(); | |
| 1401 // Since everything potentially moved, we will clear all remembered | |
|
626
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changeset
|
1402 // sets, and clear all cards. Later we will rebuild remebered |
|
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|
1403 // sets. We will also reset the GC time stamps of the regions. |
|
6254
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7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
diff
changeset
|
1404 clear_rsets_post_compaction(); |
|
a2f7274eb6ef
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diff
changeset
|
1405 check_gc_time_stamps(); |
| 342 | 1406 |
| 1407 // Resize the heap if necessary. | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
1408 resize_if_necessary_after_full_collection(explicit_gc ? 0 : word_size); |
| 342 | 1409 |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1410 if (_hr_printer.is_active()) { |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1411 // We should do this after we potentially resize the heap so |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1412 // that all the COMMIT / UNCOMMIT events are generated before |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
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parents:
3777
diff
changeset
|
1413 // the end GC event. |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
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parents:
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|
1414 |
|
6254
a2f7274eb6ef
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parents:
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diff
changeset
|
1415 print_hrs_post_compaction(); |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
1416 _hr_printer.end_gc(true /* full */, (size_t) total_collections()); |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
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parents:
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diff
changeset
|
1417 } |
|
5f6f2615433a
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diff
changeset
|
1418 |
| 342 | 1419 if (_cg1r->use_cache()) { |
| 1420 _cg1r->clear_and_record_card_counts(); | |
| 1421 _cg1r->clear_hot_cache(); | |
| 1422 } | |
| 1423 | |
|
626
87fa6e083d82
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apetrusenko
parents:
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diff
changeset
|
1424 // Rebuild remembered sets of all regions. |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
1425 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
1426 uint n_workers = |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1427 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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parents:
4090
diff
changeset
|
1428 workers()->active_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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parents:
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diff
changeset
|
1429 Threads::number_of_non_daemon_threads()); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1430 assert(UseDynamicNumberOfGCThreads || |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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parents:
4090
diff
changeset
|
1431 n_workers == workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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diff
changeset
|
1432 "If not dynamic should be using all the workers"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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parents:
4090
diff
changeset
|
1433 workers()->set_active_workers(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1434 // Set parallel threads in the heap (_n_par_threads) only |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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4090
diff
changeset
|
1435 // before a parallel phase and always reset it to 0 after |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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parents:
4090
diff
changeset
|
1436 // the phase so that the number of parallel threads does |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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parents:
4090
diff
changeset
|
1437 // no get carried forward to a serial phase where there |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1438 // may be code that is "possibly_parallel". |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1439 set_par_threads(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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parents:
4090
diff
changeset
|
1440 |
|
626
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6760309: G1: update remembered sets during Full GCs
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diff
changeset
|
1441 ParRebuildRSTask rebuild_rs_task(this); |
|
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
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changeset
|
1442 assert(check_heap_region_claim_values( |
|
87fa6e083d82
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apetrusenko
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diff
changeset
|
1443 HeapRegion::InitialClaimValue), "sanity check"); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1444 assert(UseDynamicNumberOfGCThreads || |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1445 workers()->active_workers() == workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1446 "Unless dynamic should use total workers"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1447 // Use the most recent number of active workers |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1448 assert(workers()->active_workers() > 0, |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1449 "Active workers not properly set"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
1450 set_par_threads(workers()->active_workers()); |
|
626
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1451 workers()->run_task(&rebuild_rs_task); |
|
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1452 set_par_threads(0); |
|
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1453 assert(check_heap_region_claim_values( |
|
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
620
diff
changeset
|
1454 HeapRegion::RebuildRSClaimValue), "sanity check"); |
|
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
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parents:
620
diff
changeset
|
1455 reset_heap_region_claim_values(); |
|
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
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620
diff
changeset
|
1456 } else { |
|
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
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parents:
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diff
changeset
|
1457 RebuildRSOutOfRegionClosure rebuild_rs(this); |
|
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
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parents:
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diff
changeset
|
1458 heap_region_iterate(&rebuild_rs); |
|
87fa6e083d82
6760309: G1: update remembered sets during Full GCs
apetrusenko
parents:
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diff
changeset
|
1459 } |
|
87fa6e083d82
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apetrusenko
parents:
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diff
changeset
|
1460 |
|
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
1461 if (G1Log::fine()) { |
| 342 | 1462 print_size_transition(gclog_or_tty, g1h_prev_used, used(), capacity()); |
| 1463 } | |
| 1464 | |
| 1465 if (true) { // FIXME | |
| 1466 // Ask the permanent generation to adjust size for full collections | |
| 1467 perm()->compute_new_size(); | |
| 1468 } | |
| 1469 | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1470 // Start a new incremental collection set for the next pause |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1471 assert(g1_policy()->collection_set() == NULL, "must be"); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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1391
diff
changeset
|
1472 g1_policy()->start_incremental_cset_building(); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1473 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1474 // Clear the _cset_fast_test bitmap in anticipation of adding |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1475 // regions to the incremental collection set for the next |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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parents:
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diff
changeset
|
1476 // evacuation pause. |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1477 clear_cset_fast_test(); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
1478 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1479 init_mutator_alloc_region(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
1480 |
| 342 | 1481 double end = os::elapsedTime(); |
| 1482 g1_policy()->record_full_collection_end(); | |
| 1483 | |
|
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
1484 #ifdef TRACESPINNING |
|
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
1485 ParallelTaskTerminator::print_termination_counts(); |
|
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
1486 #endif |
|
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
1487 |
| 342 | 1488 gc_epilogue(true); |
| 1489 | |
| 794 | 1490 // Discard all rset updates |
| 1491 JavaThread::dirty_card_queue_set().abandon_logs(); | |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
1492 assert(!G1DeferredRSUpdate |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
1493 || (G1DeferredRSUpdate && (dirty_card_queue_set().completed_buffers_num() == 0)), "Should not be any"); |
|
6121
b9442ac22f59
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6120
diff
changeset
|
1494 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
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6120
diff
changeset
|
1495 _young_list->reset_sampled_info(); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
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6120
diff
changeset
|
1496 // At this point there should be no regions in the |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
1497 // entire heap tagged as young. |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
1498 assert( check_young_list_empty(true /* check_heap */), |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
1499 "young list should be empty at this point"); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
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parents:
6120
diff
changeset
|
1500 |
|
b9442ac22f59
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brutisso
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6120
diff
changeset
|
1501 // Update the number of full collections that have been completed. |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
1502 increment_old_marking_cycles_completed(false /* concurrent */); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
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diff
changeset
|
1503 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
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parents:
6120
diff
changeset
|
1504 _hrs.verify_optional(); |
|
b9442ac22f59
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6120
diff
changeset
|
1505 verify_region_sets_optional(); |
|
b9442ac22f59
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6120
diff
changeset
|
1506 |
|
b9442ac22f59
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parents:
6120
diff
changeset
|
1507 print_heap_after_gc(); |
|
b9442ac22f59
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1508 |
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1509 // We must call G1MonitoringSupport::update_sizes() in the same scoping level |
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1510 // as an active TraceMemoryManagerStats object (i.e. before the destructor for the |
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1511 // TraceMemoryManagerStats is called) so that the G1 memory pools are updated |
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1512 // before any GC notifications are raised. |
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1513 g1mm()->update_sizes(); |
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1514 } |
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1515 |
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1516 post_full_gc_dump(); |
| 1973 | 1517 |
| 1518 return true; | |
| 342 | 1519 } |
| 1520 | |
| 1521 void G1CollectedHeap::do_full_collection(bool clear_all_soft_refs) { | |
| 1973 | 1522 // do_collection() will return whether it succeeded in performing |
| 1523 // the GC. Currently, there is no facility on the | |
| 1524 // do_full_collection() API to notify the caller than the collection | |
| 1525 // did not succeed (e.g., because it was locked out by the GC | |
| 1526 // locker). So, right now, we'll ignore the return value. | |
| 1527 bool dummy = do_collection(true, /* explicit_gc */ | |
| 1528 clear_all_soft_refs, | |
| 1529 0 /* word_size */); | |
| 342 | 1530 } |
| 1531 | |
| 1532 // This code is mostly copied from TenuredGeneration. | |
| 1533 void | |
| 1534 G1CollectedHeap:: | |
| 1535 resize_if_necessary_after_full_collection(size_t word_size) { | |
| 1536 assert(MinHeapFreeRatio <= MaxHeapFreeRatio, "sanity check"); | |
| 1537 | |
| 1538 // Include the current allocation, if any, and bytes that will be | |
| 1539 // pre-allocated to support collections, as "used". | |
| 1540 const size_t used_after_gc = used(); | |
| 1541 const size_t capacity_after_gc = capacity(); | |
| 1542 const size_t free_after_gc = capacity_after_gc - used_after_gc; | |
| 1543 | |
|
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1544 // This is enforced in arguments.cpp. |
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1545 assert(MinHeapFreeRatio <= MaxHeapFreeRatio, |
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1546 "otherwise the code below doesn't make sense"); |
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1547 |
| 342 | 1548 // We don't have floating point command-line arguments |
|
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1549 const double minimum_free_percentage = (double) MinHeapFreeRatio / 100.0; |
| 342 | 1550 const double maximum_used_percentage = 1.0 - minimum_free_percentage; |
|
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1551 const double maximum_free_percentage = (double) MaxHeapFreeRatio / 100.0; |
| 342 | 1552 const double minimum_used_percentage = 1.0 - maximum_free_percentage; |
| 1553 | |
|
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1554 const size_t min_heap_size = collector_policy()->min_heap_byte_size(); |
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1555 const size_t max_heap_size = collector_policy()->max_heap_byte_size(); |
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1556 |
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1557 // We have to be careful here as these two calculations can overflow |
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1558 // 32-bit size_t's. |
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1559 double used_after_gc_d = (double) used_after_gc; |
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1560 double minimum_desired_capacity_d = used_after_gc_d / maximum_used_percentage; |
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1561 double maximum_desired_capacity_d = used_after_gc_d / minimum_used_percentage; |
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1562 |
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1563 // Let's make sure that they are both under the max heap size, which |
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1564 // by default will make them fit into a size_t. |
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1565 double desired_capacity_upper_bound = (double) max_heap_size; |
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1566 minimum_desired_capacity_d = MIN2(minimum_desired_capacity_d, |
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1567 desired_capacity_upper_bound); |
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1568 maximum_desired_capacity_d = MIN2(maximum_desired_capacity_d, |
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1569 desired_capacity_upper_bound); |
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1570 |
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1571 // We can now safely turn them into size_t's. |
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1572 size_t minimum_desired_capacity = (size_t) minimum_desired_capacity_d; |
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1573 size_t maximum_desired_capacity = (size_t) maximum_desired_capacity_d; |
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1574 |
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1575 // This assert only makes sense here, before we adjust them |
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1576 // with respect to the min and max heap size. |
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1577 assert(minimum_desired_capacity <= maximum_desired_capacity, |
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1578 err_msg("minimum_desired_capacity = "SIZE_FORMAT", " |
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1579 "maximum_desired_capacity = "SIZE_FORMAT, |
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1580 minimum_desired_capacity, maximum_desired_capacity)); |
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1581 |
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1582 // Should not be greater than the heap max size. No need to adjust |
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1583 // it with respect to the heap min size as it's a lower bound (i.e., |
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1584 // we'll try to make the capacity larger than it, not smaller). |
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1585 minimum_desired_capacity = MIN2(minimum_desired_capacity, max_heap_size); |
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1586 // Should not be less than the heap min size. No need to adjust it |
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1587 // with respect to the heap max size as it's an upper bound (i.e., |
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1588 // we'll try to make the capacity smaller than it, not greater). |
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1589 maximum_desired_capacity = MAX2(maximum_desired_capacity, min_heap_size); |
| 342 | 1590 |
|
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1591 if (capacity_after_gc < minimum_desired_capacity) { |
| 342 | 1592 // Don't expand unless it's significant |
| 1593 size_t expand_bytes = minimum_desired_capacity - capacity_after_gc; | |
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1594 ergo_verbose4(ErgoHeapSizing, |
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1595 "attempt heap expansion", |
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1596 ergo_format_reason("capacity lower than " |
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1597 "min desired capacity after Full GC") |
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1598 ergo_format_byte("capacity") |
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1599 ergo_format_byte("occupancy") |
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1600 ergo_format_byte_perc("min desired capacity"), |
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1601 capacity_after_gc, used_after_gc, |
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1602 minimum_desired_capacity, (double) MinHeapFreeRatio); |
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1603 expand(expand_bytes); |
| 342 | 1604 |
| 1605 // No expansion, now see if we want to shrink | |
|
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1606 } else if (capacity_after_gc > maximum_desired_capacity) { |
| 342 | 1607 // Capacity too large, compute shrinking size |
| 1608 size_t shrink_bytes = capacity_after_gc - maximum_desired_capacity; | |
|
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1609 ergo_verbose4(ErgoHeapSizing, |
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1610 "attempt heap shrinking", |
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1611 ergo_format_reason("capacity higher than " |
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1612 "max desired capacity after Full GC") |
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1613 ergo_format_byte("capacity") |
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1614 ergo_format_byte("occupancy") |
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1615 ergo_format_byte_perc("max desired capacity"), |
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1616 capacity_after_gc, used_after_gc, |
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1617 maximum_desired_capacity, (double) MaxHeapFreeRatio); |
| 342 | 1618 shrink(shrink_bytes); |
| 1619 } | |
| 1620 } | |
| 1621 | |
| 1622 | |
| 1623 HeapWord* | |
| 1973 | 1624 G1CollectedHeap::satisfy_failed_allocation(size_t word_size, |
| 1625 bool* succeeded) { | |
| 2152 | 1626 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1973 | 1627 |
| 1628 *succeeded = true; | |
| 1629 // Let's attempt the allocation first. | |
|
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1630 HeapWord* result = |
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1631 attempt_allocation_at_safepoint(word_size, |
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1632 false /* expect_null_mutator_alloc_region */); |
| 1973 | 1633 if (result != NULL) { |
| 1634 assert(*succeeded, "sanity"); | |
| 1635 return result; | |
| 1636 } | |
| 342 | 1637 |
| 1638 // In a G1 heap, we're supposed to keep allocation from failing by | |
| 1639 // incremental pauses. Therefore, at least for now, we'll favor | |
| 1640 // expansion over collection. (This might change in the future if we can | |
| 1641 // do something smarter than full collection to satisfy a failed alloc.) | |
| 1642 result = expand_and_allocate(word_size); | |
| 1643 if (result != NULL) { | |
| 1973 | 1644 assert(*succeeded, "sanity"); |
| 342 | 1645 return result; |
| 1646 } | |
| 1647 | |
| 1973 | 1648 // Expansion didn't work, we'll try to do a Full GC. |
| 1649 bool gc_succeeded = do_collection(false, /* explicit_gc */ | |
| 1650 false, /* clear_all_soft_refs */ | |
| 1651 word_size); | |
| 1652 if (!gc_succeeded) { | |
| 1653 *succeeded = false; | |
| 1654 return NULL; | |
| 1655 } | |
| 1656 | |
| 1657 // Retry the allocation | |
| 1658 result = attempt_allocation_at_safepoint(word_size, | |
|
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1659 true /* expect_null_mutator_alloc_region */); |
| 342 | 1660 if (result != NULL) { |
| 1973 | 1661 assert(*succeeded, "sanity"); |
| 342 | 1662 return result; |
| 1663 } | |
| 1664 | |
| 1973 | 1665 // Then, try a Full GC that will collect all soft references. |
| 1666 gc_succeeded = do_collection(false, /* explicit_gc */ | |
| 1667 true, /* clear_all_soft_refs */ | |
| 1668 word_size); | |
| 1669 if (!gc_succeeded) { | |
| 1670 *succeeded = false; | |
| 1671 return NULL; | |
| 1672 } | |
| 1673 | |
| 1674 // Retry the allocation once more | |
| 1675 result = attempt_allocation_at_safepoint(word_size, | |
|
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1676 true /* expect_null_mutator_alloc_region */); |
| 342 | 1677 if (result != NULL) { |
| 1973 | 1678 assert(*succeeded, "sanity"); |
| 342 | 1679 return result; |
| 1680 } | |
| 1681 | |
|
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1682 assert(!collector_policy()->should_clear_all_soft_refs(), |
| 1973 | 1683 "Flag should have been handled and cleared prior to this point"); |
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1684 |
| 342 | 1685 // What else? We might try synchronous finalization later. If the total |
| 1686 // space available is large enough for the allocation, then a more | |
| 1687 // complete compaction phase than we've tried so far might be | |
| 1688 // appropriate. | |
| 1973 | 1689 assert(*succeeded, "sanity"); |
| 342 | 1690 return NULL; |
| 1691 } | |
| 1692 | |
| 1693 // Attempting to expand the heap sufficiently | |
| 1694 // to support an allocation of the given "word_size". If | |
| 1695 // successful, perform the allocation and return the address of the | |
| 1696 // allocated block, or else "NULL". | |
| 1697 | |
| 1698 HeapWord* G1CollectedHeap::expand_and_allocate(size_t word_size) { | |
| 2152 | 1699 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1700 | |
| 1701 verify_region_sets_optional(); | |
| 1973 | 1702 |
|
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1703 size_t expand_bytes = MAX2(word_size * HeapWordSize, MinHeapDeltaBytes); |
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1704 ergo_verbose1(ErgoHeapSizing, |
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1705 "attempt heap expansion", |
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1706 ergo_format_reason("allocation request failed") |
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1707 ergo_format_byte("allocation request"), |
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1708 word_size * HeapWordSize); |
|
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1709 if (expand(expand_bytes)) { |
| 3766 | 1710 _hrs.verify_optional(); |
|
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1711 verify_region_sets_optional(); |
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1712 return attempt_allocation_at_safepoint(word_size, |
|
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1713 false /* expect_null_mutator_alloc_region */); |
|
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1714 } |
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1715 return NULL; |
| 342 | 1716 } |
| 1717 | |
| 3766 | 1718 void G1CollectedHeap::update_committed_space(HeapWord* old_end, |
| 1719 HeapWord* new_end) { | |
| 1720 assert(old_end != new_end, "don't call this otherwise"); | |
| 1721 assert((HeapWord*) _g1_storage.high() == new_end, "invariant"); | |
| 1722 | |
| 1723 // Update the committed mem region. | |
| 1724 _g1_committed.set_end(new_end); | |
| 1725 // Tell the card table about the update. | |
| 1726 Universe::heap()->barrier_set()->resize_covered_region(_g1_committed); | |
| 1727 // Tell the BOT about the update. | |
| 1728 _bot_shared->resize(_g1_committed.word_size()); | |
| 1729 } | |
| 1730 | |
|
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1731 bool G1CollectedHeap::expand(size_t expand_bytes) { |
| 342 | 1732 size_t old_mem_size = _g1_storage.committed_size(); |
|
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1733 size_t aligned_expand_bytes = ReservedSpace::page_align_size_up(expand_bytes); |
| 342 | 1734 aligned_expand_bytes = align_size_up(aligned_expand_bytes, |
| 1735 HeapRegion::GrainBytes); | |
|
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1736 ergo_verbose2(ErgoHeapSizing, |
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1737 "expand the heap", |
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1738 ergo_format_byte("requested expansion amount") |
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1739 ergo_format_byte("attempted expansion amount"), |
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1740 expand_bytes, aligned_expand_bytes); |
|
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1741 |
| 3766 | 1742 // First commit the memory. |
| 1743 HeapWord* old_end = (HeapWord*) _g1_storage.high(); | |
|
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1744 bool successful = _g1_storage.expand_by(aligned_expand_bytes); |
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1745 if (successful) { |
| 3766 | 1746 // Then propagate this update to the necessary data structures. |
| 1747 HeapWord* new_end = (HeapWord*) _g1_storage.high(); | |
| 1748 update_committed_space(old_end, new_end); | |
| 1749 | |
| 1750 FreeRegionList expansion_list("Local Expansion List"); | |
| 1751 MemRegion mr = _hrs.expand_by(old_end, new_end, &expansion_list); | |
| 1752 assert(mr.start() == old_end, "post-condition"); | |
| 1753 // mr might be a smaller region than what was requested if | |
| 1754 // expand_by() was unable to allocate the HeapRegion instances | |
| 1755 assert(mr.end() <= new_end, "post-condition"); | |
| 1756 | |
| 1757 size_t actual_expand_bytes = mr.byte_size(); | |
| 1758 assert(actual_expand_bytes <= aligned_expand_bytes, "post-condition"); | |
| 1759 assert(actual_expand_bytes == expansion_list.total_capacity_bytes(), | |
| 1760 "post-condition"); | |
| 1761 if (actual_expand_bytes < aligned_expand_bytes) { | |
| 1762 // We could not expand _hrs to the desired size. In this case we | |
| 1763 // need to shrink the committed space accordingly. | |
| 1764 assert(mr.end() < new_end, "invariant"); | |
| 1765 | |
| 1766 size_t diff_bytes = aligned_expand_bytes - actual_expand_bytes; | |
| 1767 // First uncommit the memory. | |
| 1768 _g1_storage.shrink_by(diff_bytes); | |
| 1769 // Then propagate this update to the necessary data structures. | |
| 1770 update_committed_space(new_end, mr.end()); | |
|
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1771 } |
| 3766 | 1772 _free_list.add_as_tail(&expansion_list); |
|
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1773 |
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1774 if (_hr_printer.is_active()) { |
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1775 HeapWord* curr = mr.start(); |
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1776 while (curr < mr.end()) { |
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1777 HeapWord* curr_end = curr + HeapRegion::GrainWords; |
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1778 _hr_printer.commit(curr, curr_end); |
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1779 curr = curr_end; |
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1780 } |
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1781 assert(curr == mr.end(), "post-condition"); |
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1782 } |
|
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1783 g1_policy()->record_new_heap_size(n_regions()); |
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1784 } else { |
|
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1785 ergo_verbose0(ErgoHeapSizing, |
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1786 "did not expand the heap", |
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1787 ergo_format_reason("heap expansion operation failed")); |
|
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1788 // The expansion of the virtual storage space was unsuccessful. |
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1789 // Let's see if it was because we ran out of swap. |
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1790 if (G1ExitOnExpansionFailure && |
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1791 _g1_storage.uncommitted_size() >= aligned_expand_bytes) { |
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1792 // We had head room... |
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1793 vm_exit_out_of_memory(aligned_expand_bytes, "G1 heap expansion"); |
| 342 | 1794 } |
| 1795 } | |
|
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1796 return successful; |
| 342 | 1797 } |
| 1798 | |
| 3766 | 1799 void G1CollectedHeap::shrink_helper(size_t shrink_bytes) { |
| 342 | 1800 size_t old_mem_size = _g1_storage.committed_size(); |
| 1801 size_t aligned_shrink_bytes = | |
| 1802 ReservedSpace::page_align_size_down(shrink_bytes); | |
| 1803 aligned_shrink_bytes = align_size_down(aligned_shrink_bytes, | |
| 1804 HeapRegion::GrainBytes); | |
|
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1805 uint num_regions_deleted = 0; |
| 3766 | 1806 MemRegion mr = _hrs.shrink_by(aligned_shrink_bytes, &num_regions_deleted); |
| 1807 HeapWord* old_end = (HeapWord*) _g1_storage.high(); | |
| 1808 assert(mr.end() == old_end, "post-condition"); | |
|
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1809 |
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1810 ergo_verbose3(ErgoHeapSizing, |
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1811 "shrink the heap", |
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1812 ergo_format_byte("requested shrinking amount") |
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1813 ergo_format_byte("aligned shrinking amount") |
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1814 ergo_format_byte("attempted shrinking amount"), |
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1815 shrink_bytes, aligned_shrink_bytes, mr.byte_size()); |
| 3766 | 1816 if (mr.byte_size() > 0) { |
|
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1817 if (_hr_printer.is_active()) { |
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1818 HeapWord* curr = mr.end(); |
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1819 while (curr > mr.start()) { |
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1820 HeapWord* curr_end = curr; |
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1821 curr -= HeapRegion::GrainWords; |
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1822 _hr_printer.uncommit(curr, curr_end); |
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1823 } |
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1824 assert(curr == mr.start(), "post-condition"); |
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1825 } |
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1826 |
| 342 | 1827 _g1_storage.shrink_by(mr.byte_size()); |
| 3766 | 1828 HeapWord* new_end = (HeapWord*) _g1_storage.high(); |
| 1829 assert(mr.start() == new_end, "post-condition"); | |
| 1830 | |
| 1831 _expansion_regions += num_regions_deleted; | |
| 1832 update_committed_space(old_end, new_end); | |
| 1833 HeapRegionRemSet::shrink_heap(n_regions()); | |
|
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1834 g1_policy()->record_new_heap_size(n_regions()); |
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1835 } else { |
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1836 ergo_verbose0(ErgoHeapSizing, |
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1837 "did not shrink the heap", |
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1838 ergo_format_reason("heap shrinking operation failed")); |
| 342 | 1839 } |
| 1840 } | |
| 1841 | |
| 1842 void G1CollectedHeap::shrink(size_t shrink_bytes) { | |
| 2152 | 1843 verify_region_sets_optional(); |
| 1844 | |
|
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1845 // We should only reach here at the end of a Full GC which means we |
|
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1846 // should not not be holding to any GC alloc regions. The method |
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1847 // below will make sure of that and do any remaining clean up. |
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1848 abandon_gc_alloc_regions(); |
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1849 |
| 2152 | 1850 // Instead of tearing down / rebuilding the free lists here, we |
| 1851 // could instead use the remove_all_pending() method on free_list to | |
| 1852 // remove only the ones that we need to remove. | |
| 4072 | 1853 tear_down_region_sets(true /* free_list_only */); |
| 342 | 1854 shrink_helper(shrink_bytes); |
| 4072 | 1855 rebuild_region_sets(true /* free_list_only */); |
| 2152 | 1856 |
| 3766 | 1857 _hrs.verify_optional(); |
| 2152 | 1858 verify_region_sets_optional(); |
| 342 | 1859 } |
| 1860 | |
| 1861 // Public methods. | |
| 1862 | |
| 1863 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away | |
| 1864 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list | |
| 1865 #endif // _MSC_VER | |
| 1866 | |
| 1867 | |
| 1868 G1CollectedHeap::G1CollectedHeap(G1CollectorPolicy* policy_) : | |
| 1869 SharedHeap(policy_), | |
| 1870 _g1_policy(policy_), | |
| 1111 | 1871 _dirty_card_queue_set(false), |
| 1705 | 1872 _into_cset_dirty_card_queue_set(false), |
|
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1873 _is_alive_closure_cm(this), |
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1874 _is_alive_closure_stw(this), |
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1875 _ref_processor_cm(NULL), |
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1876 _ref_processor_stw(NULL), |
| 342 | 1877 _process_strong_tasks(new SubTasksDone(G1H_PS_NumElements)), |
| 1878 _bot_shared(NULL), | |
| 1879 _objs_with_preserved_marks(NULL), _preserved_marks_of_objs(NULL), | |
| 1880 _evac_failure_scan_stack(NULL) , | |
| 1881 _mark_in_progress(false), | |
| 2152 | 1882 _cg1r(NULL), _summary_bytes_used(0), |
|
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1883 _g1mm(NULL), |
| 342 | 1884 _refine_cte_cl(NULL), |
| 1885 _full_collection(false), | |
| 2152 | 1886 _free_list("Master Free List"), |
| 1887 _secondary_free_list("Secondary Free List"), | |
| 4072 | 1888 _old_set("Old Set"), |
| 2152 | 1889 _humongous_set("Master Humongous Set"), |
| 1890 _free_regions_coming(false), | |
| 342 | 1891 _young_list(new YoungList(this)), |
| 1892 _gc_time_stamp(0), | |
|
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1893 _retained_old_gc_alloc_region(NULL), |
| 6595 | 1894 _survivor_plab_stats(YoungPLABSize, PLABWeight), |
| 1895 _old_plab_stats(OldPLABSize, PLABWeight), | |
|
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1896 _expand_heap_after_alloc_failure(true), |
| 526 | 1897 _surviving_young_words(NULL), |
|
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1898 _old_marking_cycles_started(0), |
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1899 _old_marking_cycles_completed(0), |
| 526 | 1900 _in_cset_fast_test(NULL), |
|
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1901 _in_cset_fast_test_base(NULL), |
|
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1902 _dirty_cards_region_list(NULL), |
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1903 _worker_cset_start_region(NULL), |
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1904 _worker_cset_start_region_time_stamp(NULL) { |
| 342 | 1905 _g1h = this; // To catch bugs. |
| 1906 if (_process_strong_tasks == NULL || !_process_strong_tasks->valid()) { | |
| 1907 vm_exit_during_initialization("Failed necessary allocation."); | |
| 1908 } | |
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1909 |
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1910 _humongous_object_threshold_in_words = HeapRegion::GrainWords / 2; |
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1911 |
| 342 | 1912 int n_queues = MAX2((int)ParallelGCThreads, 1); |
| 1913 _task_queues = new RefToScanQueueSet(n_queues); | |
| 1914 | |
| 1915 int n_rem_sets = HeapRegionRemSet::num_par_rem_sets(); | |
| 1916 assert(n_rem_sets > 0, "Invariant."); | |
| 1917 | |
| 1918 HeapRegionRemSetIterator** iter_arr = | |
| 6197 | 1919 NEW_C_HEAP_ARRAY(HeapRegionRemSetIterator*, n_queues, mtGC); |
| 342 | 1920 for (int i = 0; i < n_queues; i++) { |
| 1921 iter_arr[i] = new HeapRegionRemSetIterator(); | |
| 1922 } | |
| 1923 _rem_set_iterator = iter_arr; | |
| 1924 | |
| 6197 | 1925 _worker_cset_start_region = NEW_C_HEAP_ARRAY(HeapRegion*, n_queues, mtGC); |
| 1926 _worker_cset_start_region_time_stamp = NEW_C_HEAP_ARRAY(unsigned int, n_queues, mtGC); | |
|
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1927 |
| 342 | 1928 for (int i = 0; i < n_queues; i++) { |
| 1929 RefToScanQueue* q = new RefToScanQueue(); | |
| 1930 q->initialize(); | |
| 1931 _task_queues->register_queue(i, q); | |
| 1932 } | |
| 1933 | |
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1934 clear_cset_start_regions(); |
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1935 |
| 342 | 1936 guarantee(_task_queues != NULL, "task_queues allocation failure."); |
| 6610 | 1937 #ifdef SPARC |
| 1938 // Issue a stern warning, but allow use for experimentation and debugging. | |
| 1939 if (VM_Version::is_sun4v() && UseMemSetInBOT) { | |
| 1940 assert(!FLAG_IS_DEFAULT(UseMemSetInBOT), "Error"); | |
| 1941 warning("Experimental flag -XX:+UseMemSetInBOT is known to cause instability" | |
| 1942 " on sun4v; please understand that you are using at your own risk!"); | |
| 1943 } | |
| 1944 #endif | |
| 342 | 1945 } |
| 1946 | |
| 1947 jint G1CollectedHeap::initialize() { | |
| 1166 | 1948 CollectedHeap::pre_initialize(); |
| 342 | 1949 os::enable_vtime(); |
| 1950 | |
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1951 G1Log::init(); |
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1952 |
| 342 | 1953 // Necessary to satisfy locking discipline assertions. |
| 1954 | |
| 1955 MutexLocker x(Heap_lock); | |
| 1956 | |
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1957 // We have to initialize the printer before committing the heap, as |
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1958 // it will be used then. |
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1959 _hr_printer.set_active(G1PrintHeapRegions); |
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1960 |
| 342 | 1961 // While there are no constraints in the GC code that HeapWordSize |
| 1962 // be any particular value, there are multiple other areas in the | |
| 1963 // system which believe this to be true (e.g. oop->object_size in some | |
| 1964 // cases incorrectly returns the size in wordSize units rather than | |
| 1965 // HeapWordSize). | |
| 1966 guarantee(HeapWordSize == wordSize, "HeapWordSize must equal wordSize"); | |
| 1967 | |
| 1968 size_t init_byte_size = collector_policy()->initial_heap_byte_size(); | |
| 1969 size_t max_byte_size = collector_policy()->max_heap_byte_size(); | |
| 1970 | |
| 1971 // Ensure that the sizes are properly aligned. | |
| 1972 Universe::check_alignment(init_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
| 1973 Universe::check_alignment(max_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
| 1974 | |
| 1975 _cg1r = new ConcurrentG1Refine(); | |
| 1976 | |
| 1977 // Reserve the maximum. | |
| 1978 PermanentGenerationSpec* pgs = collector_policy()->permanent_generation(); | |
| 1979 // Includes the perm-gen. | |
|
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1980 |
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1981 // When compressed oops are enabled, the preferred heap base |
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1982 // is calculated by subtracting the requested size from the |
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1983 // 32Gb boundary and using the result as the base address for |
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1984 // heap reservation. If the requested size is not aligned to |
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1985 // HeapRegion::GrainBytes (i.e. the alignment that is passed |
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1986 // into the ReservedHeapSpace constructor) then the actual |
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1987 // base of the reserved heap may end up differing from the |
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1988 // address that was requested (i.e. the preferred heap base). |
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1989 // If this happens then we could end up using a non-optimal |
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1990 // compressed oops mode. |
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1991 |
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1992 // Since max_byte_size is aligned to the size of a heap region (checked |
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1993 // above), we also need to align the perm gen size as it might not be. |
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1994 const size_t total_reserved = max_byte_size + |
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1995 align_size_up(pgs->max_size(), HeapRegion::GrainBytes); |
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1996 Universe::check_alignment(total_reserved, HeapRegion::GrainBytes, "g1 heap and perm"); |
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1997 |
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1998 char* addr = Universe::preferred_heap_base(total_reserved, Universe::UnscaledNarrowOop); |
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1999 |
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2000 ReservedHeapSpace heap_rs(total_reserved, HeapRegion::GrainBytes, |
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2001 UseLargePages, addr); |
|
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2002 |
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2003 if (UseCompressedOops) { |
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2004 if (addr != NULL && !heap_rs.is_reserved()) { |
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2005 // Failed to reserve at specified address - the requested memory |
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2006 // region is taken already, for example, by 'java' launcher. |
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2007 // Try again to reserver heap higher. |
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2008 addr = Universe::preferred_heap_base(total_reserved, Universe::ZeroBasedNarrowOop); |
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2009 |
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2010 ReservedHeapSpace heap_rs0(total_reserved, HeapRegion::GrainBytes, |
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2011 UseLargePages, addr); |
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2012 |
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2013 if (addr != NULL && !heap_rs0.is_reserved()) { |
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2014 // Failed to reserve at specified address again - give up. |
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2015 addr = Universe::preferred_heap_base(total_reserved, Universe::HeapBasedNarrowOop); |
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2016 assert(addr == NULL, ""); |
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2017 |
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2018 ReservedHeapSpace heap_rs1(total_reserved, HeapRegion::GrainBytes, |
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2019 UseLargePages, addr); |
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2020 heap_rs = heap_rs1; |
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2021 } else { |
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2022 heap_rs = heap_rs0; |
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2023 } |
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2024 } |
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2025 } |
| 342 | 2026 |
| 2027 if (!heap_rs.is_reserved()) { | |
| 2028 vm_exit_during_initialization("Could not reserve enough space for object heap"); | |
| 2029 return JNI_ENOMEM; | |
| 2030 } | |
| 2031 | |
| 2032 // It is important to do this in a way such that concurrent readers can't | |
| 2033 // temporarily think somethings in the heap. (I've actually seen this | |
| 2034 // happen in asserts: DLD.) | |
| 2035 _reserved.set_word_size(0); | |
| 2036 _reserved.set_start((HeapWord*)heap_rs.base()); | |
| 2037 _reserved.set_end((HeapWord*)(heap_rs.base() + heap_rs.size())); | |
| 2038 | |
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2039 _expansion_regions = (uint) (max_byte_size / HeapRegion::GrainBytes); |
| 342 | 2040 |
| 2041 // Create the gen rem set (and barrier set) for the entire reserved region. | |
| 2042 _rem_set = collector_policy()->create_rem_set(_reserved, 2); | |
| 2043 set_barrier_set(rem_set()->bs()); | |
| 2044 if (barrier_set()->is_a(BarrierSet::ModRef)) { | |
| 2045 _mr_bs = (ModRefBarrierSet*)_barrier_set; | |
| 2046 } else { | |
| 2047 vm_exit_during_initialization("G1 requires a mod ref bs."); | |
| 2048 return JNI_ENOMEM; | |
| 2049 } | |
| 2050 | |
| 2051 // Also create a G1 rem set. | |
| 1861 | 2052 if (mr_bs()->is_a(BarrierSet::CardTableModRef)) { |
| 2053 _g1_rem_set = new G1RemSet(this, (CardTableModRefBS*)mr_bs()); | |
| 342 | 2054 } else { |
| 1861 | 2055 vm_exit_during_initialization("G1 requires a cardtable mod ref bs."); |
| 2056 return JNI_ENOMEM; | |
| 342 | 2057 } |
| 2058 | |
| 2059 // Carve out the G1 part of the heap. | |
| 2060 | |
| 2061 ReservedSpace g1_rs = heap_rs.first_part(max_byte_size); | |
| 2062 _g1_reserved = MemRegion((HeapWord*)g1_rs.base(), | |
| 2063 g1_rs.size()/HeapWordSize); | |
| 2064 ReservedSpace perm_gen_rs = heap_rs.last_part(max_byte_size); | |
| 2065 | |
| 2066 _perm_gen = pgs->init(perm_gen_rs, pgs->init_size(), rem_set()); | |
| 2067 | |
| 2068 _g1_storage.initialize(g1_rs, 0); | |
| 2069 _g1_committed = MemRegion((HeapWord*)_g1_storage.low(), (size_t) 0); | |
| 3766 | 2070 _hrs.initialize((HeapWord*) _g1_reserved.start(), |
| 2071 (HeapWord*) _g1_reserved.end(), | |
| 2072 _expansion_regions); | |
| 342 | 2073 |
|
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2074 // 6843694 - ensure that the maximum region index can fit |
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2075 // in the remembered set structures. |
|
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2076 const uint max_region_idx = (1U << (sizeof(RegionIdx_t)*BitsPerByte-1)) - 1; |
|
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2077 guarantee((max_regions() - 1) <= max_region_idx, "too many regions"); |
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2078 |
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2079 size_t max_cards_per_region = ((size_t)1 << (sizeof(CardIdx_t)*BitsPerByte-1)) - 1; |
|
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2080 guarantee(HeapRegion::CardsPerRegion > 0, "make sure it's initialized"); |
|
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2081 guarantee(HeapRegion::CardsPerRegion < max_cards_per_region, |
|
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2082 "too many cards per region"); |
|
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2083 |
| 2152 | 2084 HeapRegionSet::set_unrealistically_long_length(max_regions() + 1); |
| 2085 | |
| 342 | 2086 _bot_shared = new G1BlockOffsetSharedArray(_reserved, |
| 2087 heap_word_size(init_byte_size)); | |
| 2088 | |
| 2089 _g1h = this; | |
| 2090 | |
|
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2091 _in_cset_fast_test_length = max_regions(); |
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2092 _in_cset_fast_test_base = |
| 6197 | 2093 NEW_C_HEAP_ARRAY(bool, (size_t) _in_cset_fast_test_length, mtGC); |
|
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2094 |
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2095 // We're biasing _in_cset_fast_test to avoid subtracting the |
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2096 // beginning of the heap every time we want to index; basically |
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2097 // it's the same with what we do with the card table. |
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2098 _in_cset_fast_test = _in_cset_fast_test_base - |
|
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2099 ((uintx) _g1_reserved.start() >> HeapRegion::LogOfHRGrainBytes); |
|
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2100 |
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2101 // Clear the _cset_fast_test bitmap in anticipation of adding |
|
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2102 // regions to the incremental collection set for the first |
|
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
2103 // evacuation pause. |
|
1316cec51b4d
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|
2104 clear_cset_fast_test(); |
|
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|
2105 |
| 342 | 2106 // Create the ConcurrentMark data structure and thread. |
| 2107 // (Must do this late, so that "max_regions" is defined.) | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
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6008
diff
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|
2108 _cm = new ConcurrentMark(heap_rs, max_regions()); |
| 342 | 2109 _cmThread = _cm->cmThread(); |
| 2110 | |
| 2111 // Initialize the from_card cache structure of HeapRegionRemSet. | |
| 2112 HeapRegionRemSet::init_heap(max_regions()); | |
| 2113 | |
| 677 | 2114 // Now expand into the initial heap size. |
|
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
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diff
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|
2115 if (!expand(init_byte_size)) { |
|
c33825b68624
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diff
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|
2116 vm_exit_during_initialization("Failed to allocate initial heap."); |
|
c33825b68624
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|
2117 return JNI_ENOMEM; |
|
c33825b68624
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diff
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|
2118 } |
| 342 | 2119 |
| 2120 // Perform any initialization actions delegated to the policy. | |
| 2121 g1_policy()->init(); | |
| 2122 | |
| 2123 _refine_cte_cl = | |
| 2124 new RefineCardTableEntryClosure(ConcurrentG1RefineThread::sts(), | |
| 2125 g1_rem_set(), | |
| 2126 concurrent_g1_refine()); | |
| 2127 JavaThread::dirty_card_queue_set().set_closure(_refine_cte_cl); | |
| 2128 | |
| 2129 JavaThread::satb_mark_queue_set().initialize(SATB_Q_CBL_mon, | |
| 2130 SATB_Q_FL_lock, | |
| 1111 | 2131 G1SATBProcessCompletedThreshold, |
| 342 | 2132 Shared_SATB_Q_lock); |
| 794 | 2133 |
| 2134 JavaThread::dirty_card_queue_set().initialize(DirtyCardQ_CBL_mon, | |
| 2135 DirtyCardQ_FL_lock, | |
| 1111 | 2136 concurrent_g1_refine()->yellow_zone(), |
| 2137 concurrent_g1_refine()->red_zone(), | |
| 794 | 2138 Shared_DirtyCardQ_lock); |
| 2139 | |
|
616
4f360ec815ba
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|
2140 if (G1DeferredRSUpdate) { |
|
4f360ec815ba
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changeset
|
2141 dirty_card_queue_set().initialize(DirtyCardQ_CBL_mon, |
|
4f360ec815ba
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diff
changeset
|
2142 DirtyCardQ_FL_lock, |
| 1111 | 2143 -1, // never trigger processing |
| 2144 -1, // no limit on length | |
|
616
4f360ec815ba
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diff
changeset
|
2145 Shared_DirtyCardQ_lock, |
|
4f360ec815ba
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iveresov
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diff
changeset
|
2146 &JavaThread::dirty_card_queue_set()); |
|
4f360ec815ba
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595
diff
changeset
|
2147 } |
| 1705 | 2148 |
| 2149 // Initialize the card queue set used to hold cards containing | |
| 2150 // references into the collection set. | |
| 2151 _into_cset_dirty_card_queue_set.initialize(DirtyCardQ_CBL_mon, | |
| 2152 DirtyCardQ_FL_lock, | |
| 2153 -1, // never trigger processing | |
| 2154 -1, // no limit on length | |
| 2155 Shared_DirtyCardQ_lock, | |
| 2156 &JavaThread::dirty_card_queue_set()); | |
| 2157 | |
| 342 | 2158 // In case we're keeping closure specialization stats, initialize those |
| 2159 // counts and that mechanism. | |
| 2160 SpecializationStats::clear(); | |
| 2161 | |
| 2162 // Do later initialization work for concurrent refinement. | |
| 2163 _cg1r->init(); | |
| 2164 | |
|
2433
abdfc822206f
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diff
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|
2165 // Here we allocate the dummy full region that is required by the |
|
abdfc822206f
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|
2166 // G1AllocRegion class. If we don't pass an address in the reserved |
|
abdfc822206f
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changeset
|
2167 // space here, lots of asserts fire. |
| 3766 | 2168 |
| 2169 HeapRegion* dummy_region = new_heap_region(0 /* index of bottom region */, | |
| 2170 _g1_reserved.start()); | |
|
2433
abdfc822206f
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|
2171 // We'll re-use the same region whether the alloc region will |
|
abdfc822206f
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|
2172 // require BOT updates or not and, if it doesn't, then a non-young |
|
abdfc822206f
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|
2173 // region will complain that it cannot support allocations without |
|
abdfc822206f
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diff
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|
2174 // BOT updates. So we'll tag the dummy region as young to avoid that. |
|
abdfc822206f
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|
2175 dummy_region->set_young(); |
|
abdfc822206f
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diff
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|
2176 // Make sure it's full. |
|
abdfc822206f
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diff
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|
2177 dummy_region->set_top(dummy_region->end()); |
|
abdfc822206f
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diff
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|
2178 G1AllocRegion::setup(this, dummy_region); |
|
abdfc822206f
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diff
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|
2179 |
|
abdfc822206f
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diff
changeset
|
2180 init_mutator_alloc_region(); |
|
abdfc822206f
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diff
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|
2181 |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
2182 // 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
|
2183 // values in the heap have been properly initialized. |
|
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
2184 _g1mm = new G1MonitoringSupport(this); |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
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parents:
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diff
changeset
|
2185 |
| 342 | 2186 return JNI_OK; |
| 2187 } | |
| 2188 | |
| 2189 void G1CollectedHeap::ref_processing_init() { | |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
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1973
diff
changeset
|
2190 // Reference processing in G1 currently works as follows: |
|
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
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diff
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|
2191 // |
|
3979
4dfb2df418f2
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diff
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|
2192 // * There are two reference processor instances. One is |
|
4dfb2df418f2
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changeset
|
2193 // used to record and process discovered references |
|
4dfb2df418f2
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diff
changeset
|
2194 // during concurrent marking; the other is used to |
|
4dfb2df418f2
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|
2195 // record and process references during STW pauses |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
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|
2196 // (both full and incremental). |
|
4dfb2df418f2
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diff
changeset
|
2197 // * Both ref processors need to 'span' the entire heap as |
|
4dfb2df418f2
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diff
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|
2198 // the regions in the collection set may be dotted around. |
|
4dfb2df418f2
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diff
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|
2199 // |
|
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
2200 // * For the concurrent marking ref processor: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
2201 // * Reference discovery is enabled at initial marking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2202 // * Reference discovery is disabled and the discovered |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2203 // references processed etc during remarking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
2204 // * Reference discovery is MT (see below). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2205 // * Reference discovery requires a barrier (see below). |
|
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
2206 // * Reference processing may or may not be MT |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
2207 // (depending on the value of ParallelRefProcEnabled |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2208 // and ParallelGCThreads). |
|
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
2209 // * A full GC disables reference discovery by the CM |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2210 // ref processor and abandons any entries on it's |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2211 // discovered lists. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2212 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2213 // * For the STW processor: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2214 // * Non MT discovery is enabled at the start of a full GC. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
2215 // * Processing and enqueueing during a full GC is non-MT. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
2216 // * During a full GC, references are processed after marking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2217 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
2218 // * Discovery (may or may not be MT) is enabled at the start |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2219 // of an incremental evacuation pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2220 // * References are processed near the end of a STW evacuation pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2221 // * For both types of GC: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2222 // * Discovery is atomic - i.e. not concurrent. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2223 // * Reference discovery will not need a barrier. |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
2224 |
| 342 | 2225 SharedHeap::ref_processing_init(); |
| 2226 MemRegion mr = reserved_region(); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2227 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2228 // Concurrent Mark ref processor |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2229 _ref_processor_cm = |
|
2369
92da084fefc9
6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads
ysr
parents:
2361
diff
changeset
|
2230 new ReferenceProcessor(mr, // span |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
2231 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
2232 // mt processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
2233 (int) ParallelGCThreads, |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
2234 // degree of mt processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
2235 (ParallelGCThreads > 1) || (ConcGCThreads > 1), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
2236 // mt discovery |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
2237 (int) MAX2(ParallelGCThreads, ConcGCThreads), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
2238 // degree of mt discovery |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2239 false, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
2240 // Reference discovery is not atomic |
|
4dfb2df418f2
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diff
changeset
|
2241 &_is_alive_closure_cm, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
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|
2242 // is alive closure |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
2243 // (for efficiency/performance) |
|
4dfb2df418f2
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johnc
parents:
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diff
changeset
|
2244 true); |
|
4dfb2df418f2
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diff
changeset
|
2245 // Setting next fields of discovered |
|
4dfb2df418f2
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diff
changeset
|
2246 // lists requires a barrier. |
|
4dfb2df418f2
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diff
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|
2247 |
|
4dfb2df418f2
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diff
changeset
|
2248 // STW ref processor |
|
4dfb2df418f2
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diff
changeset
|
2249 _ref_processor_stw = |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
2250 new ReferenceProcessor(mr, // span |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
2251 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
2252 // mt processing |
|
4dfb2df418f2
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diff
changeset
|
2253 MAX2((int)ParallelGCThreads, 1), |
|
4dfb2df418f2
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diff
changeset
|
2254 // degree of mt processing |
|
4dfb2df418f2
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diff
changeset
|
2255 (ParallelGCThreads > 1), |
|
4dfb2df418f2
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diff
changeset
|
2256 // mt discovery |
|
4dfb2df418f2
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diff
changeset
|
2257 MAX2((int)ParallelGCThreads, 1), |
|
4dfb2df418f2
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diff
changeset
|
2258 // degree of mt discovery |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
2259 true, |
|
4dfb2df418f2
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diff
changeset
|
2260 // Reference discovery is atomic |
|
4dfb2df418f2
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diff
changeset
|
2261 &_is_alive_closure_stw, |
|
4dfb2df418f2
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parents:
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diff
changeset
|
2262 // is alive closure |
|
4dfb2df418f2
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3973
diff
changeset
|
2263 // (for efficiency/performance) |
|
4dfb2df418f2
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3973
diff
changeset
|
2264 false); |
|
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diff
changeset
|
2265 // Setting next fields of discovered |
|
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diff
changeset
|
2266 // lists requires a barrier. |
| 342 | 2267 } |
| 2268 | |
| 2269 size_t G1CollectedHeap::capacity() const { | |
| 2270 return _g1_committed.byte_size(); | |
| 2271 } | |
| 2272 | |
|
6254
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6220
diff
changeset
|
2273 void G1CollectedHeap::reset_gc_time_stamps(HeapRegion* hr) { |
|
a2f7274eb6ef
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diff
changeset
|
2274 assert(!hr->continuesHumongous(), "pre-condition"); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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|
2275 hr->reset_gc_time_stamp(); |
|
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|
2276 if (hr->startsHumongous()) { |
|
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|
2277 uint first_index = hr->hrs_index() + 1; |
|
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|
2278 uint last_index = hr->last_hc_index(); |
|
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|
2279 for (uint i = first_index; i < last_index; i += 1) { |
|
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|
2280 HeapRegion* chr = region_at(i); |
|
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|
2281 assert(chr->continuesHumongous(), "sanity"); |
|
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|
2282 chr->reset_gc_time_stamp(); |
|
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|
2283 } |
|
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|
2284 } |
|
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|
2285 } |
|
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|
2286 |
|
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|
2287 #ifndef PRODUCT |
|
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|
2288 class CheckGCTimeStampsHRClosure : public HeapRegionClosure { |
|
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|
2289 private: |
|
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|
2290 unsigned _gc_time_stamp; |
|
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|
2291 bool _failures; |
|
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|
2292 |
|
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|
2293 public: |
|
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|
2294 CheckGCTimeStampsHRClosure(unsigned gc_time_stamp) : |
|
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|
2295 _gc_time_stamp(gc_time_stamp), _failures(false) { } |
|
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|
2296 |
|
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|
2297 virtual bool doHeapRegion(HeapRegion* hr) { |
|
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|
2298 unsigned region_gc_time_stamp = hr->get_gc_time_stamp(); |
|
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|
2299 if (_gc_time_stamp != region_gc_time_stamp) { |
|
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|
2300 gclog_or_tty->print_cr("Region "HR_FORMAT" has GC time stamp = %d, " |
|
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|
2301 "expected %d", HR_FORMAT_PARAMS(hr), |
|
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|
2302 region_gc_time_stamp, _gc_time_stamp); |
|
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|
2303 _failures = true; |
|
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|
2304 } |
|
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|
2305 return false; |
|
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|
2306 } |
|
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|
2307 |
|
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|
2308 bool failures() { return _failures; } |
|
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|
2309 }; |
|
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|
2310 |
|
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|
2311 void G1CollectedHeap::check_gc_time_stamps() { |
|
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|
2312 CheckGCTimeStampsHRClosure cl(_gc_time_stamp); |
|
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|
2313 heap_region_iterate(&cl); |
|
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|
2314 guarantee(!cl.failures(), "all GC time stamps should have been reset"); |
|
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|
2315 } |
|
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|
2316 #endif // PRODUCT |
|
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|
2317 |
| 1705 | 2318 void G1CollectedHeap::iterate_dirty_card_closure(CardTableEntryClosure* cl, |
| 2319 DirtyCardQueue* into_cset_dcq, | |
| 2320 bool concurrent, | |
| 342 | 2321 int worker_i) { |
| 889 | 2322 // Clean cards in the hot card cache |
| 1705 | 2323 concurrent_g1_refine()->clean_up_cache(worker_i, g1_rem_set(), into_cset_dcq); |
| 889 | 2324 |
| 342 | 2325 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); |
| 2326 int n_completed_buffers = 0; | |
| 1705 | 2327 while (dcqs.apply_closure_to_completed_buffer(cl, worker_i, 0, true)) { |
| 342 | 2328 n_completed_buffers++; |
| 2329 } | |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
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6188
diff
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|
2330 g1_policy()->phase_times()->record_update_rs_processed_buffers(worker_i, |
| 342 | 2331 (double) n_completed_buffers); |
| 2332 dcqs.clear_n_completed_buffers(); | |
| 2333 assert(!dcqs.completed_buffers_exist_dirty(), "Completed buffers exist!"); | |
| 2334 } | |
| 2335 | |
| 2336 | |
| 2337 // Computes the sum of the storage used by the various regions. | |
| 2338 | |
| 2339 size_t G1CollectedHeap::used() const { | |
|
862
36b5611220a7
6863216: Clean up debugging debris inadvertently pushed with 6700789
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861
diff
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|
2340 assert(Heap_lock->owner() != NULL, |
|
36b5611220a7
6863216: Clean up debugging debris inadvertently pushed with 6700789
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diff
changeset
|
2341 "Should be owned on this thread's behalf."); |
| 342 | 2342 size_t result = _summary_bytes_used; |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
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|
2343 // Read only once in case it is set to NULL concurrently |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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|
2344 HeapRegion* hr = _mutator_alloc_region.get(); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
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|
2345 if (hr != NULL) |
|
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6700789: G1: Enable use of compressed oops with G1 heaps
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|
2346 result += hr->used(); |
| 342 | 2347 return result; |
| 2348 } | |
| 2349 | |
|
846
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
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|
2350 size_t G1CollectedHeap::used_unlocked() const { |
|
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
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diff
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|
2351 size_t result = _summary_bytes_used; |
|
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
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|
2352 return result; |
|
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
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diff
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|
2353 } |
|
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
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diff
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|
2354 |
| 342 | 2355 class SumUsedClosure: public HeapRegionClosure { |
| 2356 size_t _used; | |
| 2357 public: | |
| 2358 SumUsedClosure() : _used(0) {} | |
| 2359 bool doHeapRegion(HeapRegion* r) { | |
| 2360 if (!r->continuesHumongous()) { | |
| 2361 _used += r->used(); | |
| 2362 } | |
| 2363 return false; | |
| 2364 } | |
| 2365 size_t result() { return _used; } | |
| 2366 }; | |
| 2367 | |
| 2368 size_t G1CollectedHeap::recalculate_used() const { | |
| 2369 SumUsedClosure blk; | |
| 3766 | 2370 heap_region_iterate(&blk); |
| 342 | 2371 return blk.result(); |
| 2372 } | |
| 2373 | |
| 2374 size_t G1CollectedHeap::unsafe_max_alloc() { | |
| 2152 | 2375 if (free_regions() > 0) return HeapRegion::GrainBytes; |
| 342 | 2376 // otherwise, is there space in the current allocation region? |
| 2377 | |
| 2378 // We need to store the current allocation region in a local variable | |
| 2379 // here. The problem is that this method doesn't take any locks and | |
| 2380 // there may be other threads which overwrite the current allocation | |
| 2381 // region field. attempt_allocation(), for example, sets it to NULL | |
| 2382 // and this can happen *after* the NULL check here but before the call | |
| 2383 // to free(), resulting in a SIGSEGV. Note that this doesn't appear | |
| 2384 // to be a problem in the optimized build, since the two loads of the | |
| 2385 // current allocation region field are optimized away. | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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|
2386 HeapRegion* hr = _mutator_alloc_region.get(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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diff
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|
2387 if (hr == NULL) { |
| 342 | 2388 return 0; |
| 2389 } | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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diff
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|
2390 return hr->free(); |
| 342 | 2391 } |
| 2392 | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
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|
2393 bool G1CollectedHeap::should_do_concurrent_full_gc(GCCause::Cause cause) { |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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4875
diff
changeset
|
2394 switch (cause) { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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diff
changeset
|
2395 case GCCause::_gc_locker: return GCLockerInvokesConcurrent; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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4875
diff
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|
2396 case GCCause::_java_lang_system_gc: return ExplicitGCInvokesConcurrent; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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4875
diff
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|
2397 case GCCause::_g1_humongous_allocation: return true; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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4875
diff
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|
2398 default: return false; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
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4875
diff
changeset
|
2399 } |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2400 } |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
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1611
diff
changeset
|
2401 |
|
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
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2433
diff
changeset
|
2402 #ifndef PRODUCT |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
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2433
diff
changeset
|
2403 void G1CollectedHeap::allocate_dummy_regions() { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2404 // Let's fill up most of the region |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2405 size_t word_size = HeapRegion::GrainWords - 1024; |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2406 // And as a result the region we'll allocate will be humongous. |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2407 guarantee(isHumongous(word_size), "sanity"); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2408 |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2409 for (uintx i = 0; i < G1DummyRegionsPerGC; ++i) { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2410 // Let's use the existing mechanism for the allocation |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2411 HeapWord* dummy_obj = humongous_obj_allocate(word_size); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2412 if (dummy_obj != NULL) { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2413 MemRegion mr(dummy_obj, word_size); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2414 CollectedHeap::fill_with_object(mr); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2415 } else { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2416 // If we can't allocate once, we probably cannot allocate |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2417 // again. Let's get out of the loop. |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2418 break; |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2419 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2420 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2421 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2422 #endif // !PRODUCT |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2423 |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2424 void G1CollectedHeap::increment_old_marking_cycles_started() { |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2425 assert(_old_marking_cycles_started == _old_marking_cycles_completed || |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
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|
2426 _old_marking_cycles_started == _old_marking_cycles_completed + 1, |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2427 err_msg("Wrong marking cycle count (started: %d, completed: %d)", |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2428 _old_marking_cycles_started, _old_marking_cycles_completed)); |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2429 |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2430 _old_marking_cycles_started++; |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2431 } |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2432 |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2433 void G1CollectedHeap::increment_old_marking_cycles_completed(bool concurrent) { |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2434 MonitorLockerEx x(FullGCCount_lock, Mutex::_no_safepoint_check_flag); |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2435 |
|
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2436 // We assume that if concurrent == true, then the caller is a |
|
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2437 // concurrent thread that was joined the Suspendible Thread |
|
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2438 // Set. If there's ever a cheap way to check this, we should add an |
|
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2439 // assert here. |
|
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2440 |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2441 // Given that this method is called at the end of a Full GC or of a |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2442 // concurrent cycle, and those can be nested (i.e., a Full GC can |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2443 // interrupt a concurrent cycle), the number of full collections |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2444 // completed should be either one (in the case where there was no |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2445 // nesting) or two (when a Full GC interrupted a concurrent cycle) |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2446 // behind the number of full collections started. |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2447 |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2448 // This is the case for the inner caller, i.e. a Full GC. |
|
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2449 assert(concurrent || |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2450 (_old_marking_cycles_started == _old_marking_cycles_completed + 1) || |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2451 (_old_marking_cycles_started == _old_marking_cycles_completed + 2), |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2452 err_msg("for inner caller (Full GC): _old_marking_cycles_started = %u " |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2453 "is inconsistent with _old_marking_cycles_completed = %u", |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2454 _old_marking_cycles_started, _old_marking_cycles_completed)); |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2455 |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2456 // This is the case for the outer caller, i.e. the concurrent cycle. |
|
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2457 assert(!concurrent || |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2458 (_old_marking_cycles_started == _old_marking_cycles_completed + 1), |
|
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2459 err_msg("for outer caller (concurrent cycle): " |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2460 "_old_marking_cycles_started = %u " |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2461 "is inconsistent with _old_marking_cycles_completed = %u", |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2462 _old_marking_cycles_started, _old_marking_cycles_completed)); |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2463 |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2464 _old_marking_cycles_completed += 1; |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2465 |
|
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2466 // We need to clear the "in_progress" flag in the CM thread before |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2467 // we wake up any waiters (especially when ExplicitInvokesConcurrent |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2468 // is set) so that if a waiter requests another System.gc() it doesn't |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2469 // incorrectly see that a marking cyle is still in progress. |
|
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2470 if (concurrent) { |
|
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2471 _cmThread->clear_in_progress(); |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2472 } |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2473 |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2474 // This notify_all() will ensure that a thread that called |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2475 // System.gc() with (with ExplicitGCInvokesConcurrent set or not) |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2476 // and it's waiting for a full GC to finish will be woken up. It is |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2477 // waiting in VM_G1IncCollectionPause::doit_epilogue(). |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2478 FullGCCount_lock->notify_all(); |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2479 } |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2480 |
| 342 | 2481 void G1CollectedHeap::collect_as_vm_thread(GCCause::Cause cause) { |
| 2152 | 2482 assert_at_safepoint(true /* should_be_vm_thread */); |
| 342 | 2483 GCCauseSetter gcs(this, cause); |
| 2484 switch (cause) { | |
| 2485 case GCCause::_heap_inspection: | |
| 2486 case GCCause::_heap_dump: { | |
| 2487 HandleMark hm; | |
| 2488 do_full_collection(false); // don't clear all soft refs | |
| 2489 break; | |
| 2490 } | |
| 2491 default: // XXX FIX ME | |
| 2492 ShouldNotReachHere(); // Unexpected use of this function | |
| 2493 } | |
| 2494 } | |
| 2495 | |
|
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2496 void G1CollectedHeap::collect(GCCause::Cause cause) { |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2497 assert_heap_not_locked(); |
|
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2498 |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2499 unsigned int gc_count_before; |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2500 unsigned int old_marking_count_before; |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2501 bool retry_gc; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2502 |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2503 do { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2504 retry_gc = false; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2505 |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2506 { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2507 MutexLocker ml(Heap_lock); |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2508 |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2509 // Read the GC count while holding the Heap_lock |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2510 gc_count_before = total_collections(); |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2511 old_marking_count_before = _old_marking_cycles_started; |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2512 } |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2513 |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2514 if (should_do_concurrent_full_gc(cause)) { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2515 // Schedule an initial-mark evacuation pause that will start a |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2516 // concurrent cycle. We're setting word_size to 0 which means that |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2517 // we are not requesting a post-GC allocation. |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2518 VM_G1IncCollectionPause op(gc_count_before, |
| 1973 | 2519 0, /* word_size */ |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2520 true, /* should_initiate_conc_mark */ |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2521 g1_policy()->max_pause_time_ms(), |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2522 cause); |
|
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2523 |
|
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2524 VMThread::execute(&op); |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2525 if (!op.pause_succeeded()) { |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2526 if (old_marking_count_before == _old_marking_cycles_started) { |
|
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2527 retry_gc = op.should_retry_gc(); |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2528 } else { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2529 // A Full GC happened while we were trying to schedule the |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2530 // initial-mark GC. No point in starting a new cycle given |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2531 // that the whole heap was collected anyway. |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2532 } |
|
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2533 |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2534 if (retry_gc) { |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2535 if (GC_locker::is_active_and_needs_gc()) { |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2536 GC_locker::stall_until_clear(); |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2537 } |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2538 } |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2539 } |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2540 } else { |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2541 if (cause == GCCause::_gc_locker |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2542 DEBUG_ONLY(|| cause == GCCause::_scavenge_alot)) { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2543 |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2544 // Schedule a standard evacuation pause. We're setting word_size |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2545 // to 0 which means that we are not requesting a post-GC allocation. |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2546 VM_G1IncCollectionPause op(gc_count_before, |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2547 0, /* word_size */ |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2548 false, /* should_initiate_conc_mark */ |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2549 g1_policy()->max_pause_time_ms(), |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2550 cause); |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2551 VMThread::execute(&op); |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2552 } else { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2553 // Schedule a Full GC. |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2554 VM_G1CollectFull op(gc_count_before, old_marking_count_before, cause); |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2555 VMThread::execute(&op); |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2556 } |
|
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2557 } |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2558 } while (retry_gc); |
| 342 | 2559 } |
| 2560 | |
| 2561 bool G1CollectedHeap::is_in(const void* p) const { | |
| 4708 | 2562 if (_g1_committed.contains(p)) { |
| 2563 // Given that we know that p is in the committed space, | |
| 2564 // heap_region_containing_raw() should successfully | |
| 2565 // return the containing region. | |
| 2566 HeapRegion* hr = heap_region_containing_raw(p); | |
| 342 | 2567 return hr->is_in(p); |
| 2568 } else { | |
| 2569 return _perm_gen->as_gen()->is_in(p); | |
| 2570 } | |
| 2571 } | |
| 2572 | |
| 2573 // Iteration functions. | |
| 2574 | |
| 2575 // Iterates an OopClosure over all ref-containing fields of objects | |
| 2576 // within a HeapRegion. | |
| 2577 | |
| 2578 class IterateOopClosureRegionClosure: public HeapRegionClosure { | |
| 2579 MemRegion _mr; | |
| 2580 OopClosure* _cl; | |
| 2581 public: | |
| 2582 IterateOopClosureRegionClosure(MemRegion mr, OopClosure* cl) | |
| 2583 : _mr(mr), _cl(cl) {} | |
| 2584 bool doHeapRegion(HeapRegion* r) { | |
|
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2585 if (!r->continuesHumongous()) { |
| 342 | 2586 r->oop_iterate(_cl); |
| 2587 } | |
| 2588 return false; | |
| 2589 } | |
| 2590 }; | |
| 2591 | |
| 678 | 2592 void G1CollectedHeap::oop_iterate(OopClosure* cl, bool do_perm) { |
| 342 | 2593 IterateOopClosureRegionClosure blk(_g1_committed, cl); |
| 3766 | 2594 heap_region_iterate(&blk); |
| 678 | 2595 if (do_perm) { |
| 2596 perm_gen()->oop_iterate(cl); | |
| 2597 } | |
| 342 | 2598 } |
| 2599 | |
| 678 | 2600 void G1CollectedHeap::oop_iterate(MemRegion mr, OopClosure* cl, bool do_perm) { |
| 342 | 2601 IterateOopClosureRegionClosure blk(mr, cl); |
| 3766 | 2602 heap_region_iterate(&blk); |
| 678 | 2603 if (do_perm) { |
| 2604 perm_gen()->oop_iterate(cl); | |
| 2605 } | |
| 342 | 2606 } |
| 2607 | |
| 2608 // Iterates an ObjectClosure over all objects within a HeapRegion. | |
| 2609 | |
| 2610 class IterateObjectClosureRegionClosure: public HeapRegionClosure { | |
| 2611 ObjectClosure* _cl; | |
| 2612 public: | |
| 2613 IterateObjectClosureRegionClosure(ObjectClosure* cl) : _cl(cl) {} | |
| 2614 bool doHeapRegion(HeapRegion* r) { | |
| 2615 if (! r->continuesHumongous()) { | |
| 2616 r->object_iterate(_cl); | |
| 2617 } | |
| 2618 return false; | |
| 2619 } | |
| 2620 }; | |
| 2621 | |
| 678 | 2622 void G1CollectedHeap::object_iterate(ObjectClosure* cl, bool do_perm) { |
| 342 | 2623 IterateObjectClosureRegionClosure blk(cl); |
| 3766 | 2624 heap_region_iterate(&blk); |
| 678 | 2625 if (do_perm) { |
| 2626 perm_gen()->object_iterate(cl); | |
| 2627 } | |
| 342 | 2628 } |
| 2629 | |
| 2630 void G1CollectedHeap::object_iterate_since_last_GC(ObjectClosure* cl) { | |
| 2631 // FIXME: is this right? | |
| 2632 guarantee(false, "object_iterate_since_last_GC not supported by G1 heap"); | |
| 2633 } | |
| 2634 | |
| 2635 // Calls a SpaceClosure on a HeapRegion. | |
| 2636 | |
| 2637 class SpaceClosureRegionClosure: public HeapRegionClosure { | |
| 2638 SpaceClosure* _cl; | |
| 2639 public: | |
| 2640 SpaceClosureRegionClosure(SpaceClosure* cl) : _cl(cl) {} | |
| 2641 bool doHeapRegion(HeapRegion* r) { | |
| 2642 _cl->do_space(r); | |
| 2643 return false; | |
| 2644 } | |
| 2645 }; | |
| 2646 | |
| 2647 void G1CollectedHeap::space_iterate(SpaceClosure* cl) { | |
| 2648 SpaceClosureRegionClosure blk(cl); | |
| 3766 | 2649 heap_region_iterate(&blk); |
| 342 | 2650 } |
| 2651 | |
| 3766 | 2652 void G1CollectedHeap::heap_region_iterate(HeapRegionClosure* cl) const { |
| 2653 _hrs.iterate(cl); | |
| 342 | 2654 } |
| 2655 | |
| 2656 void | |
| 2657 G1CollectedHeap::heap_region_par_iterate_chunked(HeapRegionClosure* cl, | |
|
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2658 uint worker_id, |
|
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2659 uint no_of_par_workers, |
| 342 | 2660 jint claim_value) { |
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2661 const uint regions = n_regions(); |
|
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2662 const uint max_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
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2663 no_of_par_workers : |
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2664 1); |
|
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2665 assert(UseDynamicNumberOfGCThreads || |
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2666 no_of_par_workers == workers()->total_workers(), |
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2667 "Non dynamic should use fixed number of workers"); |
| 355 | 2668 // try to spread out the starting points of the workers |
|
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2669 const HeapRegion* start_hr = |
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2670 start_region_for_worker(worker_id, no_of_par_workers); |
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2671 const uint start_index = start_hr->hrs_index(); |
| 355 | 2672 |
| 2673 // each worker will actually look at all regions | |
|
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2674 for (uint count = 0; count < regions; ++count) { |
|
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2675 const uint index = (start_index + count) % regions; |
| 355 | 2676 assert(0 <= index && index < regions, "sanity"); |
| 2677 HeapRegion* r = region_at(index); | |
| 2678 // we'll ignore "continues humongous" regions (we'll process them | |
| 2679 // when we come across their corresponding "start humongous" | |
| 2680 // region) and regions already claimed | |
| 2681 if (r->claim_value() == claim_value || r->continuesHumongous()) { | |
| 2682 continue; | |
| 2683 } | |
| 2684 // OK, try to claim it | |
| 342 | 2685 if (r->claimHeapRegion(claim_value)) { |
| 355 | 2686 // success! |
| 2687 assert(!r->continuesHumongous(), "sanity"); | |
| 2688 if (r->startsHumongous()) { | |
| 2689 // If the region is "starts humongous" we'll iterate over its | |
| 2690 // "continues humongous" first; in fact we'll do them | |
| 2691 // first. The order is important. In on case, calling the | |
| 2692 // closure on the "starts humongous" region might de-allocate | |
| 2693 // and clear all its "continues humongous" regions and, as a | |
| 2694 // result, we might end up processing them twice. So, we'll do | |
| 2695 // them first (notice: most closures will ignore them anyway) and | |
| 2696 // then we'll do the "starts humongous" region. | |
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2697 for (uint ch_index = index + 1; ch_index < regions; ++ch_index) { |
| 355 | 2698 HeapRegion* chr = region_at(ch_index); |
| 2699 | |
| 2700 // if the region has already been claimed or it's not | |
| 2701 // "continues humongous" we're done | |
| 2702 if (chr->claim_value() == claim_value || | |
| 2703 !chr->continuesHumongous()) { | |
| 2704 break; | |
| 2705 } | |
| 2706 | |
| 2707 // Noone should have claimed it directly. We can given | |
| 2708 // that we claimed its "starts humongous" region. | |
| 2709 assert(chr->claim_value() != claim_value, "sanity"); | |
| 2710 assert(chr->humongous_start_region() == r, "sanity"); | |
| 2711 | |
| 2712 if (chr->claimHeapRegion(claim_value)) { | |
| 2713 // we should always be able to claim it; noone else should | |
| 2714 // be trying to claim this region | |
| 2715 | |
| 2716 bool res2 = cl->doHeapRegion(chr); | |
| 2717 assert(!res2, "Should not abort"); | |
| 2718 | |
| 2719 // Right now, this holds (i.e., no closure that actually | |
| 2720 // does something with "continues humongous" regions | |
| 2721 // clears them). We might have to weaken it in the future, | |
| 2722 // but let's leave these two asserts here for extra safety. | |
| 2723 assert(chr->continuesHumongous(), "should still be the case"); | |
| 2724 assert(chr->humongous_start_region() == r, "sanity"); | |
| 2725 } else { | |
| 2726 guarantee(false, "we should not reach here"); | |
| 2727 } | |
| 2728 } | |
| 2729 } | |
| 2730 | |
| 2731 assert(!r->continuesHumongous(), "sanity"); | |
| 2732 bool res = cl->doHeapRegion(r); | |
| 2733 assert(!res, "Should not abort"); | |
| 2734 } | |
| 2735 } | |
| 2736 } | |
| 2737 | |
| 390 | 2738 class ResetClaimValuesClosure: public HeapRegionClosure { |
| 2739 public: | |
| 2740 bool doHeapRegion(HeapRegion* r) { | |
| 2741 r->set_claim_value(HeapRegion::InitialClaimValue); | |
| 2742 return false; | |
| 2743 } | |
| 2744 }; | |
| 2745 | |
|
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2746 void G1CollectedHeap::reset_heap_region_claim_values() { |
| 390 | 2747 ResetClaimValuesClosure blk; |
| 2748 heap_region_iterate(&blk); | |
| 2749 } | |
| 2750 | |
|
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2751 void G1CollectedHeap::reset_cset_heap_region_claim_values() { |
|
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2752 ResetClaimValuesClosure blk; |
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2753 collection_set_iterate(&blk); |
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2754 } |
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2755 |
| 355 | 2756 #ifdef ASSERT |
| 2757 // This checks whether all regions in the heap have the correct claim | |
| 2758 // value. I also piggy-backed on this a check to ensure that the | |
| 2759 // humongous_start_region() information on "continues humongous" | |
| 2760 // regions is correct. | |
| 2761 | |
| 2762 class CheckClaimValuesClosure : public HeapRegionClosure { | |
| 2763 private: | |
| 2764 jint _claim_value; | |
|
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2765 uint _failures; |
| 355 | 2766 HeapRegion* _sh_region; |
|
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2767 |
| 355 | 2768 public: |
| 2769 CheckClaimValuesClosure(jint claim_value) : | |
| 2770 _claim_value(claim_value), _failures(0), _sh_region(NULL) { } | |
| 2771 bool doHeapRegion(HeapRegion* r) { | |
| 2772 if (r->claim_value() != _claim_value) { | |
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2773 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
| 355 | 2774 "claim value = %d, should be %d", |
|
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2775 HR_FORMAT_PARAMS(r), |
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|
2776 r->claim_value(), _claim_value); |
| 355 | 2777 ++_failures; |
| 2778 } | |
| 2779 if (!r->isHumongous()) { | |
| 2780 _sh_region = NULL; | |
| 2781 } else if (r->startsHumongous()) { | |
| 2782 _sh_region = r; | |
| 2783 } else if (r->continuesHumongous()) { | |
| 2784 if (r->humongous_start_region() != _sh_region) { | |
|
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|
2785 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
| 355 | 2786 "HS = "PTR_FORMAT", should be "PTR_FORMAT, |
|
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|
2787 HR_FORMAT_PARAMS(r), |
| 355 | 2788 r->humongous_start_region(), |
| 2789 _sh_region); | |
| 2790 ++_failures; | |
| 342 | 2791 } |
| 2792 } | |
| 355 | 2793 return false; |
| 2794 } | |
|
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|
2795 uint failures() { return _failures; } |
| 355 | 2796 }; |
| 2797 | |
| 2798 bool G1CollectedHeap::check_heap_region_claim_values(jint claim_value) { | |
| 2799 CheckClaimValuesClosure cl(claim_value); | |
| 2800 heap_region_iterate(&cl); | |
| 2801 return cl.failures() == 0; | |
| 2802 } | |
|
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2803 |
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|
2804 class CheckClaimValuesInCSetHRClosure: public HeapRegionClosure { |
|
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2805 private: |
|
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|
2806 jint _claim_value; |
|
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2807 uint _failures; |
|
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2808 |
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2809 public: |
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|
2810 CheckClaimValuesInCSetHRClosure(jint claim_value) : |
|
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2811 _claim_value(claim_value), _failures(0) { } |
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2812 |
|
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2813 uint failures() { return _failures; } |
|
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2814 |
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|
2815 bool doHeapRegion(HeapRegion* hr) { |
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2816 assert(hr->in_collection_set(), "how?"); |
|
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2817 assert(!hr->isHumongous(), "H-region in CSet"); |
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2818 if (hr->claim_value() != _claim_value) { |
|
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2819 gclog_or_tty->print_cr("CSet Region " HR_FORMAT ", " |
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2820 "claim value = %d, should be %d", |
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2821 HR_FORMAT_PARAMS(hr), |
|
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|
2822 hr->claim_value(), _claim_value); |
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2823 _failures += 1; |
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|
2824 } |
|
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|
2825 return false; |
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|
2826 } |
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|
2827 }; |
|
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|
2828 |
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|
2829 bool G1CollectedHeap::check_cset_heap_region_claim_values(jint claim_value) { |
|
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2830 CheckClaimValuesInCSetHRClosure cl(claim_value); |
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2831 collection_set_iterate(&cl); |
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2832 return cl.failures() == 0; |
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|
2833 } |
| 355 | 2834 #endif // ASSERT |
| 342 | 2835 |
|
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2836 // Clear the cached CSet starting regions and (more importantly) |
|
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2837 // the time stamps. Called when we reset the GC time stamp. |
|
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2838 void G1CollectedHeap::clear_cset_start_regions() { |
|
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2839 assert(_worker_cset_start_region != NULL, "sanity"); |
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2840 assert(_worker_cset_start_region_time_stamp != NULL, "sanity"); |
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2841 |
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2842 int n_queues = MAX2((int)ParallelGCThreads, 1); |
|
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2843 for (int i = 0; i < n_queues; i++) { |
|
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2844 _worker_cset_start_region[i] = NULL; |
|
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2845 _worker_cset_start_region_time_stamp[i] = 0; |
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4708
diff
changeset
|
2846 } |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2847 } |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2848 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2849 // Given the id of a worker, obtain or calculate a suitable |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2850 // starting region for iterating over the current collection set. |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2851 HeapRegion* G1CollectedHeap::start_cset_region_for_worker(int worker_i) { |
|
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2852 assert(get_gc_time_stamp() > 0, "should have been updated by now"); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2853 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2854 HeapRegion* result = NULL; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2855 unsigned gc_time_stamp = get_gc_time_stamp(); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2856 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2857 if (_worker_cset_start_region_time_stamp[worker_i] == gc_time_stamp) { |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2858 // Cached starting region for current worker was set |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2859 // during the current pause - so it's valid. |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2860 // Note: the cached starting heap region may be NULL |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2861 // (when the collection set is empty). |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2862 result = _worker_cset_start_region[worker_i]; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2863 assert(result == NULL || result->in_collection_set(), "sanity"); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2864 return result; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2865 } |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2866 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2867 // The cached entry was not valid so let's calculate |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2868 // a suitable starting heap region for this worker. |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2869 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2870 // We want the parallel threads to start their collection |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2871 // set iteration at different collection set regions to |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2872 // avoid contention. |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2873 // If we have: |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2874 // n collection set regions |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2875 // p threads |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2876 // Then thread t will start at region floor ((t * n) / p) |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2877 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2878 result = g1_policy()->collection_set(); |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2879 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2880 uint cs_size = g1_policy()->cset_region_length(); |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
2881 uint active_workers = workers()->active_workers(); |
|
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2882 assert(UseDynamicNumberOfGCThreads || |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2883 active_workers == workers()->total_workers(), |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2884 "Unless dynamic should use total workers"); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2885 |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2886 uint end_ind = (cs_size * worker_i) / active_workers; |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2887 uint start_ind = 0; |
|
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2888 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2889 if (worker_i > 0 && |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2890 _worker_cset_start_region_time_stamp[worker_i - 1] == gc_time_stamp) { |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2891 // Previous workers starting region is valid |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2892 // so let's iterate from there |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2893 start_ind = (cs_size * (worker_i - 1)) / active_workers; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2894 result = _worker_cset_start_region[worker_i - 1]; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2895 } |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2896 |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2897 for (uint i = start_ind; i < end_ind; i++) { |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2898 result = result->next_in_collection_set(); |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2899 } |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2900 } |
|
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2901 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2902 // Note: the calculated starting heap region may be NULL |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2903 // (when the collection set is empty). |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2904 assert(result == NULL || result->in_collection_set(), "sanity"); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2905 assert(_worker_cset_start_region_time_stamp[worker_i] != gc_time_stamp, |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2906 "should be updated only once per pause"); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2907 _worker_cset_start_region[worker_i] = result; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2908 OrderAccess::storestore(); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2909 _worker_cset_start_region_time_stamp[worker_i] = gc_time_stamp; |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2910 return result; |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2911 } |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2912 |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2913 HeapRegion* G1CollectedHeap::start_region_for_worker(uint worker_i, |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2914 uint no_of_par_workers) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2915 uint worker_num = |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2916 G1CollectedHeap::use_parallel_gc_threads() ? no_of_par_workers : 1U; |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2917 assert(UseDynamicNumberOfGCThreads || |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2918 no_of_par_workers == workers()->total_workers(), |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2919 "Non dynamic should use fixed number of workers"); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2920 const uint start_index = n_regions() * worker_i / worker_num; |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2921 return region_at(start_index); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2922 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2923 |
| 342 | 2924 void G1CollectedHeap::collection_set_iterate(HeapRegionClosure* cl) { |
| 2925 HeapRegion* r = g1_policy()->collection_set(); | |
| 2926 while (r != NULL) { | |
| 2927 HeapRegion* next = r->next_in_collection_set(); | |
| 2928 if (cl->doHeapRegion(r)) { | |
| 2929 cl->incomplete(); | |
| 2930 return; | |
| 2931 } | |
| 2932 r = next; | |
| 2933 } | |
| 2934 } | |
| 2935 | |
| 2936 void G1CollectedHeap::collection_set_iterate_from(HeapRegion* r, | |
| 2937 HeapRegionClosure *cl) { | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2938 if (r == NULL) { |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2939 // 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
|
2940 return; |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2941 } |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2942 |
| 342 | 2943 assert(r->in_collection_set(), |
| 2944 "Start region must be a member of the collection set."); | |
| 2945 HeapRegion* cur = r; | |
| 2946 while (cur != NULL) { | |
| 2947 HeapRegion* next = cur->next_in_collection_set(); | |
| 2948 if (cl->doHeapRegion(cur) && false) { | |
| 2949 cl->incomplete(); | |
| 2950 return; | |
| 2951 } | |
| 2952 cur = next; | |
| 2953 } | |
| 2954 cur = g1_policy()->collection_set(); | |
| 2955 while (cur != r) { | |
| 2956 HeapRegion* next = cur->next_in_collection_set(); | |
| 2957 if (cl->doHeapRegion(cur) && false) { | |
| 2958 cl->incomplete(); | |
| 2959 return; | |
| 2960 } | |
| 2961 cur = next; | |
| 2962 } | |
| 2963 } | |
| 2964 | |
| 2965 CompactibleSpace* G1CollectedHeap::first_compactible_space() { | |
| 3766 | 2966 return n_regions() > 0 ? region_at(0) : NULL; |
| 342 | 2967 } |
| 2968 | |
| 2969 | |
| 2970 Space* G1CollectedHeap::space_containing(const void* addr) const { | |
| 2971 Space* res = heap_region_containing(addr); | |
| 2972 if (res == NULL) | |
| 2973 res = perm_gen()->space_containing(addr); | |
| 2974 return res; | |
| 2975 } | |
| 2976 | |
| 2977 HeapWord* G1CollectedHeap::block_start(const void* addr) const { | |
| 2978 Space* sp = space_containing(addr); | |
| 2979 if (sp != NULL) { | |
| 2980 return sp->block_start(addr); | |
| 2981 } | |
| 2982 return NULL; | |
| 2983 } | |
| 2984 | |
| 2985 size_t G1CollectedHeap::block_size(const HeapWord* addr) const { | |
| 2986 Space* sp = space_containing(addr); | |
| 2987 assert(sp != NULL, "block_size of address outside of heap"); | |
| 2988 return sp->block_size(addr); | |
| 2989 } | |
| 2990 | |
| 2991 bool G1CollectedHeap::block_is_obj(const HeapWord* addr) const { | |
| 2992 Space* sp = space_containing(addr); | |
| 2993 return sp->block_is_obj(addr); | |
| 2994 } | |
| 2995 | |
| 2996 bool G1CollectedHeap::supports_tlab_allocation() const { | |
| 2997 return true; | |
| 2998 } | |
| 2999 | |
| 3000 size_t G1CollectedHeap::tlab_capacity(Thread* ignored) const { | |
| 3001 return HeapRegion::GrainBytes; | |
| 3002 } | |
| 3003 | |
| 3004 size_t G1CollectedHeap::unsafe_max_tlab_alloc(Thread* ignored) const { | |
| 3005 // Return the remaining space in the cur alloc region, but not less than | |
| 3006 // the min TLAB size. | |
|
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
3007 |
|
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
3008 // 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
|
3009 // since we can't allow tlabs to grow big enough to accomodate |
|
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
3010 // humongous objects. |
|
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
3011 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3012 HeapRegion* hr = _mutator_alloc_region.get(); |
|
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
3013 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
|
3014 if (hr == NULL) { |
|
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
3015 return max_tlab_size; |
| 342 | 3016 } else { |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3017 return MIN2(MAX2(hr->free(), (size_t) MinTLABSize), max_tlab_size); |
| 342 | 3018 } |
| 3019 } | |
| 3020 | |
| 3021 size_t G1CollectedHeap::max_capacity() const { | |
|
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
3022 return _g1_reserved.byte_size(); |
| 342 | 3023 } |
| 3024 | |
| 3025 jlong G1CollectedHeap::millis_since_last_gc() { | |
| 3026 // assert(false, "NYI"); | |
| 3027 return 0; | |
| 3028 } | |
| 3029 | |
| 3030 void G1CollectedHeap::prepare_for_verify() { | |
| 3031 if (SafepointSynchronize::is_at_safepoint() || ! UseTLAB) { | |
| 3032 ensure_parsability(false); | |
| 3033 } | |
| 3034 g1_rem_set()->prepare_for_verify(); | |
| 3035 } | |
| 3036 | |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3037 bool G1CollectedHeap::allocated_since_marking(oop obj, HeapRegion* hr, |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3038 VerifyOption vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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|
3039 switch (vo) { |
|
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|
3040 case VerifyOption_G1UsePrevMarking: |
|
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|
3041 return hr->obj_allocated_since_prev_marking(obj); |
|
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|
3042 case VerifyOption_G1UseNextMarking: |
|
a2f7274eb6ef
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|
3043 return hr->obj_allocated_since_next_marking(obj); |
|
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|
3044 case VerifyOption_G1UseMarkWord: |
|
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|
3045 return false; |
|
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|
3046 default: |
|
a2f7274eb6ef
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changeset
|
3047 ShouldNotReachHere(); |
|
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|
3048 } |
|
a2f7274eb6ef
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|
3049 return false; // keep some compilers happy |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
3050 } |
|
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|
3051 |
|
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|
3052 HeapWord* G1CollectedHeap::top_at_mark_start(HeapRegion* hr, VerifyOption vo) { |
|
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|
3053 switch (vo) { |
|
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|
3054 case VerifyOption_G1UsePrevMarking: return hr->prev_top_at_mark_start(); |
|
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|
3055 case VerifyOption_G1UseNextMarking: return hr->next_top_at_mark_start(); |
|
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|
3056 case VerifyOption_G1UseMarkWord: return NULL; |
|
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|
3057 default: ShouldNotReachHere(); |
|
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|
3058 } |
|
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|
3059 return NULL; // keep some compilers happy |
|
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|
3060 } |
|
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|
3061 |
|
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|
3062 bool G1CollectedHeap::is_marked(oop obj, VerifyOption vo) { |
|
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|
3063 switch (vo) { |
|
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|
3064 case VerifyOption_G1UsePrevMarking: return isMarkedPrev(obj); |
|
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|
3065 case VerifyOption_G1UseNextMarking: return isMarkedNext(obj); |
|
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|
3066 case VerifyOption_G1UseMarkWord: return obj->is_gc_marked(); |
|
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|
3067 default: ShouldNotReachHere(); |
|
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|
3068 } |
|
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|
3069 return false; // keep some compilers happy |
|
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|
3070 } |
|
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|
3071 |
|
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|
3072 const char* G1CollectedHeap::top_at_mark_start_str(VerifyOption vo) { |
|
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|
3073 switch (vo) { |
|
a2f7274eb6ef
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|
3074 case VerifyOption_G1UsePrevMarking: return "PTAMS"; |
|
a2f7274eb6ef
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|
3075 case VerifyOption_G1UseNextMarking: return "NTAMS"; |
|
a2f7274eb6ef
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|
3076 case VerifyOption_G1UseMarkWord: return "NONE"; |
|
a2f7274eb6ef
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|
3077 default: ShouldNotReachHere(); |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
3078 } |
|
a2f7274eb6ef
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parents:
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changeset
|
3079 return NULL; // keep some compilers happy |
|
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
3080 } |
|
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|
3081 |
| 342 | 3082 class VerifyLivenessOopClosure: public OopClosure { |
|
3772
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changeset
|
3083 G1CollectedHeap* _g1h; |
|
6747fd0512e0
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changeset
|
3084 VerifyOption _vo; |
| 342 | 3085 public: |
|
3772
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changeset
|
3086 VerifyLivenessOopClosure(G1CollectedHeap* g1h, VerifyOption vo): |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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parents:
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changeset
|
3087 _g1h(g1h), _vo(vo) |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
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diff
changeset
|
3088 { } |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3089 void do_oop(narrowOop *p) { do_oop_work(p); } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
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diff
changeset
|
3090 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
|
3091 |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
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diff
changeset
|
3092 template <class T> void do_oop_work(T *p) { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
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diff
changeset
|
3093 oop obj = oopDesc::load_decode_heap_oop(p); |
|
3772
6747fd0512e0
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johnc
parents:
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diff
changeset
|
3094 guarantee(obj == NULL || !_g1h->is_obj_dead_cond(obj, _vo), |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
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parents:
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diff
changeset
|
3095 "Dead object referenced by a not dead object"); |
| 342 | 3096 } |
| 3097 }; | |
| 3098 | |
| 3099 class VerifyObjsInRegionClosure: public ObjectClosure { | |
| 811 | 3100 private: |
| 342 | 3101 G1CollectedHeap* _g1h; |
| 3102 size_t _live_bytes; | |
| 3103 HeapRegion *_hr; | |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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parents:
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diff
changeset
|
3104 VerifyOption _vo; |
| 342 | 3105 public: |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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parents:
3766
diff
changeset
|
3106 // _vo == UsePrevMarking -> use "prev" marking information, |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3107 // _vo == UseNextMarking -> use "next" marking information, |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3108 // _vo == UseMarkWord -> use mark word from object header. |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
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diff
changeset
|
3109 VerifyObjsInRegionClosure(HeapRegion *hr, VerifyOption vo) |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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diff
changeset
|
3110 : _live_bytes(0), _hr(hr), _vo(vo) { |
| 342 | 3111 _g1h = G1CollectedHeap::heap(); |
| 3112 } | |
| 3113 void do_object(oop o) { | |
|
3772
6747fd0512e0
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johnc
parents:
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diff
changeset
|
3114 VerifyLivenessOopClosure isLive(_g1h, _vo); |
| 342 | 3115 assert(o != NULL, "Huh?"); |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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parents:
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diff
changeset
|
3116 if (!_g1h->is_obj_dead_cond(o, _vo)) { |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3117 // If the object is alive according to the mark word, |
|
6747fd0512e0
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diff
changeset
|
3118 // then verify that the marking information agrees. |
|
6747fd0512e0
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johnc
parents:
3766
diff
changeset
|
3119 // Note we can't verify the contra-positive of the |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3120 // above: if the object is dead (according to the mark |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3121 // 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
|
3122 // but has since became dead, or may have been allocated |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3123 // since the last marking. |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3124 if (_vo == VerifyOption_G1UseMarkWord) { |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3125 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
|
3126 } |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3127 |
| 342 | 3128 o->oop_iterate(&isLive); |
|
1389
5dbd9300cf9c
6943926: G1: Integer overflow during heap region verification
johnc
parents:
1388
diff
changeset
|
3129 if (!_hr->obj_allocated_since_prev_marking(o)) { |
|
5dbd9300cf9c
6943926: G1: Integer overflow during heap region verification
johnc
parents:
1388
diff
changeset
|
3130 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
|
3131 _live_bytes += (obj_size * HeapWordSize); |
|
5dbd9300cf9c
6943926: G1: Integer overflow during heap region verification
johnc
parents:
1388
diff
changeset
|
3132 } |
| 342 | 3133 } |
| 3134 } | |
| 3135 size_t live_bytes() { return _live_bytes; } | |
| 3136 }; | |
| 3137 | |
| 3138 class PrintObjsInRegionClosure : public ObjectClosure { | |
| 3139 HeapRegion *_hr; | |
| 3140 G1CollectedHeap *_g1; | |
| 3141 public: | |
| 3142 PrintObjsInRegionClosure(HeapRegion *hr) : _hr(hr) { | |
| 3143 _g1 = G1CollectedHeap::heap(); | |
| 3144 }; | |
| 3145 | |
| 3146 void do_object(oop o) { | |
| 3147 if (o != NULL) { | |
| 3148 HeapWord *start = (HeapWord *) o; | |
| 3149 size_t word_sz = o->size(); | |
| 3150 gclog_or_tty->print("\nPrinting obj "PTR_FORMAT" of size " SIZE_FORMAT | |
| 3151 " isMarkedPrev %d isMarkedNext %d isAllocSince %d\n", | |
| 3152 (void*) o, word_sz, | |
| 3153 _g1->isMarkedPrev(o), | |
| 3154 _g1->isMarkedNext(o), | |
| 3155 _hr->obj_allocated_since_prev_marking(o)); | |
| 3156 HeapWord *end = start + word_sz; | |
| 3157 HeapWord *cur; | |
| 3158 int *val; | |
| 3159 for (cur = start; cur < end; cur++) { | |
| 3160 val = (int *) cur; | |
| 3161 gclog_or_tty->print("\t "PTR_FORMAT":"PTR_FORMAT"\n", val, *val); | |
| 3162 } | |
| 3163 } | |
| 3164 } | |
| 3165 }; | |
| 3166 | |
| 3167 class VerifyRegionClosure: public HeapRegionClosure { | |
| 811 | 3168 private: |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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diff
changeset
|
3169 bool _par; |
|
a2f7274eb6ef
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diff
changeset
|
3170 VerifyOption _vo; |
|
a2f7274eb6ef
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|
3171 bool _failures; |
| 811 | 3172 public: |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3173 // _vo == UsePrevMarking -> use "prev" marking information, |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
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3766
diff
changeset
|
3174 // _vo == UseNextMarking -> use "next" marking information, |
|
6747fd0512e0
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johnc
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3766
diff
changeset
|
3175 // _vo == UseMarkWord -> use mark word from object header. |
| 6008 | 3176 VerifyRegionClosure(bool par, VerifyOption vo) |
| 3177 : _par(par), | |
|
3772
6747fd0512e0
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diff
changeset
|
3178 _vo(vo), |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
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1019
diff
changeset
|
3179 _failures(false) {} |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3180 |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
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1019
diff
changeset
|
3181 bool failures() { |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3182 return _failures; |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
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1019
diff
changeset
|
3183 } |
|
845
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6700789: G1: Enable use of compressed oops with G1 heaps
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838
diff
changeset
|
3184 |
| 342 | 3185 bool doHeapRegion(HeapRegion* r) { |
|
637
25e146966e7c
6817419: G1: Enable extensive verification for humongous regions
iveresov
parents:
636
diff
changeset
|
3186 if (!r->continuesHumongous()) { |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3187 bool failures = false; |
| 6008 | 3188 r->verify(_vo, &failures); |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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1019
diff
changeset
|
3189 if (failures) { |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3190 _failures = true; |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3191 } else { |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
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3766
diff
changeset
|
3192 VerifyObjsInRegionClosure not_dead_yet_cl(r, _vo); |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3193 r->object_iterate(¬_dead_yet_cl); |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
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4785
diff
changeset
|
3194 if (_vo != VerifyOption_G1UseNextMarking) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3195 if (r->max_live_bytes() < not_dead_yet_cl.live_bytes()) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3196 gclog_or_tty->print_cr("["PTR_FORMAT","PTR_FORMAT"] " |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3197 "max_live_bytes "SIZE_FORMAT" " |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3198 "< calculated "SIZE_FORMAT, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3199 r->bottom(), r->end(), |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3200 r->max_live_bytes(), |
|
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|
3201 not_dead_yet_cl.live_bytes()); |
|
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|
3202 _failures = true; |
|
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|
3203 } |
|
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|
3204 } else { |
|
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|
3205 // When vo == UseNextMarking we cannot currently do a sanity |
|
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|
3206 // check on the live bytes as the calculation has not been |
|
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|
3207 // finalized yet. |
|
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|
3208 } |
|
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|
3209 } |
| 342 | 3210 } |
|
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|
3211 return false; // stop the region iteration if we hit a failure |
| 342 | 3212 } |
| 3213 }; | |
| 3214 | |
| 3215 class VerifyRootsClosure: public OopsInGenClosure { | |
| 3216 private: | |
| 3217 G1CollectedHeap* _g1h; | |
|
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3218 VerifyOption _vo; |
| 342 | 3219 bool _failures; |
| 3220 public: | |
|
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3221 // _vo == UsePrevMarking -> use "prev" marking information, |
|
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3222 // _vo == UseNextMarking -> use "next" marking information, |
|
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3223 // _vo == UseMarkWord -> use mark word from object header. |
|
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3224 VerifyRootsClosure(VerifyOption vo) : |
|
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3225 _g1h(G1CollectedHeap::heap()), |
|
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|
3226 _vo(vo), |
|
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|
3227 _failures(false) { } |
| 342 | 3228 |
| 3229 bool failures() { return _failures; } | |
| 3230 | |
|
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|
3231 template <class T> void do_oop_nv(T* p) { |
|
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3232 T heap_oop = oopDesc::load_heap_oop(p); |
|
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|
3233 if (!oopDesc::is_null(heap_oop)) { |
|
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3234 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
|
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|
3235 if (_g1h->is_obj_dead_cond(obj, _vo)) { |
| 342 | 3236 gclog_or_tty->print_cr("Root location "PTR_FORMAT" " |
|
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|
3237 "points to dead obj "PTR_FORMAT, p, (void*) obj); |
|
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|
3238 if (_vo == VerifyOption_G1UseMarkWord) { |
|
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|
3239 gclog_or_tty->print_cr(" Mark word: "PTR_FORMAT, (void*)(obj->mark())); |
|
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|
3240 } |
| 342 | 3241 obj->print_on(gclog_or_tty); |
| 3242 _failures = true; | |
| 3243 } | |
| 3244 } | |
| 3245 } | |
|
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|
3246 |
|
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|
3247 void do_oop(oop* p) { do_oop_nv(p); } |
|
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|
3248 void do_oop(narrowOop* p) { do_oop_nv(p); } |
| 342 | 3249 }; |
| 3250 | |
| 390 | 3251 // This is the task used for parallel heap verification. |
| 3252 | |
| 3253 class G1ParVerifyTask: public AbstractGangTask { | |
| 3254 private: | |
| 3255 G1CollectedHeap* _g1h; | |
|
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|
3256 VerifyOption _vo; |
|
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|
3257 bool _failures; |
| 390 | 3258 |
| 3259 public: | |
|
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|
3260 // _vo == UsePrevMarking -> use "prev" marking information, |
|
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|
3261 // _vo == UseNextMarking -> use "next" marking information, |
|
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|
3262 // _vo == UseMarkWord -> use mark word from object header. |
| 6008 | 3263 G1ParVerifyTask(G1CollectedHeap* g1h, VerifyOption vo) : |
| 390 | 3264 AbstractGangTask("Parallel verify task"), |
|
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|
3265 _g1h(g1h), |
|
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|
3266 _vo(vo), |
|
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|
3267 _failures(false) { } |
|
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|
3268 |
|
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|
3269 bool failures() { |
|
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|
3270 return _failures; |
|
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|
3271 } |
| 390 | 3272 |
|
4728
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|
3273 void work(uint worker_id) { |
|
637
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6817419: G1: Enable extensive verification for humongous regions
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changeset
|
3274 HandleMark hm; |
| 6008 | 3275 VerifyRegionClosure blk(true, _vo); |
|
4728
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|
3276 _g1h->heap_region_par_iterate_chunked(&blk, worker_id, |
|
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|
3277 _g1h->workers()->active_workers(), |
| 390 | 3278 HeapRegion::ParVerifyClaimValue); |
|
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|
3279 if (blk.failures()) { |
|
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|
3280 _failures = true; |
|
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|
3281 } |
| 390 | 3282 } |
| 3283 }; | |
| 3284 | |
| 6008 | 3285 void G1CollectedHeap::verify(bool silent) { |
| 3286 verify(silent, VerifyOption_G1UsePrevMarking); | |
| 3287 } | |
| 3288 | |
| 3289 void G1CollectedHeap::verify(bool silent, | |
|
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|
3290 VerifyOption vo) { |
| 342 | 3291 if (SafepointSynchronize::is_at_safepoint() || ! UseTLAB) { |
|
3293
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|
3292 if (!silent) { gclog_or_tty->print("Roots (excluding permgen) "); } |
|
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|
3293 VerifyRootsClosure rootsCl(vo); |
|
4095
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|
3294 |
|
bca17e38de00
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changeset
|
3295 assert(Thread::current()->is_VM_thread(), |
|
bca17e38de00
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|
3296 "Expected to be executed serially by the VM thread at this point"); |
|
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|
3297 |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
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890
diff
changeset
|
3298 CodeBlobToOopClosure blobsCl(&rootsCl, /*do_marking=*/ false); |
|
3772
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|
3299 |
|
3293
1f4413413144
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|
3300 // We apply the relevant closures to all the oops in the |
|
1f4413413144
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3289
diff
changeset
|
3301 // system dictionary, the string table and the code cache. |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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diff
changeset
|
3302 const int so = SO_AllClasses | SO_Strings | SO_CodeCache; |
|
3772
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|
3303 |
|
3293
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changeset
|
3304 process_strong_roots(true, // activate StrongRootsScope |
|
1f4413413144
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diff
changeset
|
3305 true, // we set "collecting perm gen" to true, |
|
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|
3306 // so we don't reset the dirty cards in the perm gen. |
|
4910
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diff
changeset
|
3307 ScanningOption(so), // roots scanning options |
| 342 | 3308 &rootsCl, |
|
989
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changeset
|
3309 &blobsCl, |
| 342 | 3310 &rootsCl); |
|
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|
3311 |
|
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changeset
|
3312 // If we're verifying after the marking phase of a Full GC then we can't |
|
6747fd0512e0
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changeset
|
3313 // treat the perm gen as roots into the G1 heap. Some of the objects in |
|
6747fd0512e0
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diff
changeset
|
3314 // the perm gen may be dead and hence not marked. If one of these dead |
|
6747fd0512e0
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diff
changeset
|
3315 // objects is considered to be a root then we may end up with a false |
|
6747fd0512e0
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diff
changeset
|
3316 // "Root location <x> points to dead ob <y>" failure. |
|
6747fd0512e0
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|
3317 if (vo != VerifyOption_G1UseMarkWord) { |
|
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changeset
|
3318 // Since we used "collecting_perm_gen" == true above, we will not have |
|
6747fd0512e0
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changeset
|
3319 // checked the refs from perm into the G1-collected heap. We check those |
|
6747fd0512e0
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changeset
|
3320 // references explicitly below. Whether the relevant cards are dirty |
|
6747fd0512e0
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diff
changeset
|
3321 // is checked further below in the rem set verification. |
|
6747fd0512e0
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3766
diff
changeset
|
3322 if (!silent) { gclog_or_tty->print("Permgen roots "); } |
|
6747fd0512e0
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|
3323 perm_gen()->oop_iterate(&rootsCl); |
|
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|
3324 } |
|
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|
3325 bool failures = rootsCl.failures(); |
|
3772
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3766
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changeset
|
3326 |
|
6747fd0512e0
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3766
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changeset
|
3327 if (vo != VerifyOption_G1UseMarkWord) { |
|
6747fd0512e0
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changeset
|
3328 // If we're verifying during a full GC then the region sets |
|
6747fd0512e0
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3766
diff
changeset
|
3329 // will have been torn down at the start of the GC. Therefore |
|
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changeset
|
3330 // verifying the region sets will fail. So we only verify |
|
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|
3331 // the region sets when not in a full GC. |
|
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changeset
|
3332 if (!silent) { gclog_or_tty->print("HeapRegionSets "); } |
|
6747fd0512e0
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3766
diff
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|
3333 verify_region_sets(); |
|
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3766
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changeset
|
3334 } |
|
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changeset
|
3335 |
| 2152 | 3336 if (!silent) { gclog_or_tty->print("HeapRegions "); } |
| 390 | 3337 if (GCParallelVerificationEnabled && ParallelGCThreads > 1) { |
| 3338 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 3339 "sanity check"); | |
| 3340 | |
| 6008 | 3341 G1ParVerifyTask task(this, vo); |
|
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|
3342 assert(UseDynamicNumberOfGCThreads || |
|
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|
3343 workers()->active_workers() == workers()->total_workers(), |
|
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|
3344 "If not dynamic should be using all the workers"); |
|
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|
3345 int n_workers = workers()->active_workers(); |
| 390 | 3346 set_par_threads(n_workers); |
| 3347 workers()->run_task(&task); | |
| 3348 set_par_threads(0); | |
|
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|
3349 if (task.failures()) { |
|
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|
3350 failures = true; |
|
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|
3351 } |
| 390 | 3352 |
|
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|
3353 // Checks that the expected amount of parallel work was done. |
|
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changeset
|
3354 // The implication is that n_workers is > 0. |
| 390 | 3355 assert(check_heap_region_claim_values(HeapRegion::ParVerifyClaimValue), |
| 3356 "sanity check"); | |
| 3357 | |
| 3358 reset_heap_region_claim_values(); | |
| 3359 | |
| 3360 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 3361 "sanity check"); | |
| 3362 } else { | |
| 6008 | 3363 VerifyRegionClosure blk(false, vo); |
| 3766 | 3364 heap_region_iterate(&blk); |
|
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|
3365 if (blk.failures()) { |
|
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|
3366 failures = true; |
|
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|
3367 } |
| 390 | 3368 } |
| 2152 | 3369 if (!silent) gclog_or_tty->print("RemSet "); |
| 342 | 3370 rem_set()->verify(); |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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|
3371 |
|
ff2402f6a50b
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tonyp
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diff
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|
3372 if (failures) { |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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changeset
|
3373 gclog_or_tty->print_cr("Heap:"); |
|
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
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|
3374 // 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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|
3375 // help us track down what went wrong. This is why we call |
|
53074c2c4600
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|
3376 // print_extended_on() instead of print_on(). |
|
53074c2c4600
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changeset
|
3377 print_extended_on(gclog_or_tty); |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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|
3378 gclog_or_tty->print_cr(""); |
|
1547
fb1a39993f69
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
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diff
changeset
|
3379 #ifndef PRODUCT |
| 1044 | 3380 if (VerifyDuringGC && G1VerifyDuringGCPrintReachable) { |
| 1388 | 3381 concurrent_mark()->print_reachable("at-verification-failure", |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
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changeset
|
3382 vo, false /* all */); |
|
1020
ff2402f6a50b
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|
3383 } |
|
1547
fb1a39993f69
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jcoomes
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diff
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|
3384 #endif |
|
1020
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|
3385 gclog_or_tty->flush(); |
|
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|
3386 } |
|
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|
3387 guarantee(!failures, "there should not have been any failures"); |
| 342 | 3388 } else { |
| 3389 if (!silent) gclog_or_tty->print("(SKIPPING roots, heapRegions, remset) "); | |
| 3390 } | |
| 3391 } | |
| 3392 | |
| 3393 class PrintRegionClosure: public HeapRegionClosure { | |
| 3394 outputStream* _st; | |
| 3395 public: | |
| 3396 PrintRegionClosure(outputStream* st) : _st(st) {} | |
| 3397 bool doHeapRegion(HeapRegion* r) { | |
| 3398 r->print_on(_st); | |
| 3399 return false; | |
| 3400 } | |
| 3401 }; | |
| 3402 | |
| 3403 void G1CollectedHeap::print_on(outputStream* st) const { | |
|
838
0316eac49d5a
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|
3404 st->print(" %-20s", "garbage-first heap"); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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|
3405 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")
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|
3406 capacity()/K, used_unlocked()/K); |
|
838
0316eac49d5a
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|
3407 st->print(" [" INTPTR_FORMAT ", " INTPTR_FORMAT ", " INTPTR_FORMAT ")", |
|
0316eac49d5a
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|
3408 _g1_storage.low_boundary(), |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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|
3409 _g1_storage.high(), |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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|
3410 _g1_storage.high_boundary()); |
|
0316eac49d5a
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|
3411 st->cr(); |
|
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
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diff
changeset
|
3412 st->print(" region size " SIZE_FORMAT "K, ", HeapRegion::GrainBytes / K); |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
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|
3413 uint young_regions = _young_list->length(); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
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diff
changeset
|
3414 st->print("%u young (" SIZE_FORMAT "K), ", young_regions, |
|
720b6a76dd9d
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tonyp
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changeset
|
3415 (size_t) young_regions * HeapRegion::GrainBytes / K); |
|
720b6a76dd9d
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tonyp
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|
3416 uint survivor_regions = g1_policy()->recorded_survivor_regions(); |
|
720b6a76dd9d
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tonyp
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|
3417 st->print("%u survivors (" SIZE_FORMAT "K)", survivor_regions, |
|
720b6a76dd9d
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tonyp
parents:
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changeset
|
3418 (size_t) survivor_regions * HeapRegion::GrainBytes / K); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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|
3419 st->cr(); |
|
0316eac49d5a
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|
3420 perm()->as_gen()->print_on(st); |
|
4073
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|
3421 } |
|
53074c2c4600
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|
3422 |
|
53074c2c4600
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|
3423 void G1CollectedHeap::print_extended_on(outputStream* st) const { |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
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parents:
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diff
changeset
|
3424 print_on(st); |
|
53074c2c4600
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changeset
|
3425 |
|
53074c2c4600
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changeset
|
3426 // Print the per-region information. |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
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changeset
|
3427 st->cr(); |
|
6010
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7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
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diff
changeset
|
3428 st->print_cr("Heap Regions: (Y=young(eden), SU=young(survivor), " |
|
720b6a76dd9d
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parents:
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changeset
|
3429 "HS=humongous(starts), HC=humongous(continues), " |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
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|
3430 "CS=collection set, F=free, TS=gc time stamp, " |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
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diff
changeset
|
3431 "PTAMS=previous top-at-mark-start, " |
|
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tonyp
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changeset
|
3432 "NTAMS=next top-at-mark-start)"); |
| 342 | 3433 PrintRegionClosure blk(st); |
| 3766 | 3434 heap_region_iterate(&blk); |
| 342 | 3435 } |
| 3436 | |
| 3437 void G1CollectedHeap::print_gc_threads_on(outputStream* st) const { | |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
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1755
diff
changeset
|
3438 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 1019 | 3439 workers()->print_worker_threads_on(st); |
| 3440 } | |
| 3441 _cmThread->print_on(st); | |
| 342 | 3442 st->cr(); |
| 1019 | 3443 _cm->print_worker_threads_on(st); |
| 3444 _cg1r->print_worker_threads_on(st); | |
| 342 | 3445 st->cr(); |
| 3446 } | |
| 3447 | |
| 3448 void G1CollectedHeap::gc_threads_do(ThreadClosure* tc) const { | |
|
1833
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jmasa
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diff
changeset
|
3449 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 342 | 3450 workers()->threads_do(tc); |
| 3451 } | |
| 3452 tc->do_thread(_cmThread); | |
| 794 | 3453 _cg1r->threads_do(tc); |
| 342 | 3454 } |
| 3455 | |
| 3456 void G1CollectedHeap::print_tracing_info() const { | |
| 3457 // We'll overload this to mean "trace GC pause statistics." | |
| 3458 if (TraceGen0Time || TraceGen1Time) { | |
| 3459 // The "G1CollectorPolicy" is keeping track of these stats, so delegate | |
| 3460 // to that. | |
| 3461 g1_policy()->print_tracing_info(); | |
| 3462 } | |
| 751 | 3463 if (G1SummarizeRSetStats) { |
| 342 | 3464 g1_rem_set()->print_summary_info(); |
| 3465 } | |
| 1282 | 3466 if (G1SummarizeConcMark) { |
| 342 | 3467 concurrent_mark()->print_summary_info(); |
| 3468 } | |
| 3469 g1_policy()->print_yg_surv_rate_info(); | |
| 3470 SpecializationStats::print(); | |
| 3471 } | |
| 3472 | |
|
3777
e8b0b0392037
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diff
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|
3473 #ifndef PRODUCT |
|
e8b0b0392037
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3774
diff
changeset
|
3474 // Helpful for debugging RSet issues. |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
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3774
diff
changeset
|
3475 |
|
e8b0b0392037
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changeset
|
3476 class PrintRSetsClosure : public HeapRegionClosure { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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parents:
3774
diff
changeset
|
3477 private: |
|
e8b0b0392037
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diff
changeset
|
3478 const char* _msg; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3479 size_t _occupied_sum; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3480 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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parents:
3774
diff
changeset
|
3481 public: |
|
e8b0b0392037
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tonyp
parents:
3774
diff
changeset
|
3482 bool doHeapRegion(HeapRegion* r) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3483 HeapRegionRemSet* hrrs = r->rem_set(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
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3774
diff
changeset
|
3484 size_t occupied = hrrs->occupied(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3485 _occupied_sum += occupied; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3486 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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parents:
3774
diff
changeset
|
3487 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
|
3488 HR_FORMAT_PARAMS(r)); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3489 if (occupied == 0) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3490 gclog_or_tty->print_cr(" RSet is empty"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3491 } else { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3492 hrrs->print(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3493 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3494 gclog_or_tty->print_cr("----------"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3495 return false; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3496 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3497 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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3774
diff
changeset
|
3498 PrintRSetsClosure(const char* msg) : _msg(msg), _occupied_sum(0) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3499 gclog_or_tty->cr(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3500 gclog_or_tty->print_cr("========================================"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3501 gclog_or_tty->print_cr(msg); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3502 gclog_or_tty->cr(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3503 } |
|
e8b0b0392037
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3774
diff
changeset
|
3504 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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3774
diff
changeset
|
3505 ~PrintRSetsClosure() { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3506 gclog_or_tty->print_cr("Occupied Sum: "SIZE_FORMAT, _occupied_sum); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3507 gclog_or_tty->print_cr("========================================"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3508 gclog_or_tty->cr(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3509 } |
|
e8b0b0392037
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tonyp
parents:
3774
diff
changeset
|
3510 }; |
|
e8b0b0392037
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parents:
3774
diff
changeset
|
3511 |
|
e8b0b0392037
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parents:
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diff
changeset
|
3512 void G1CollectedHeap::print_cset_rsets() { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3513 PrintRSetsClosure cl("Printing CSet RSets"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3514 collection_set_iterate(&cl); |
|
e8b0b0392037
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parents:
3774
diff
changeset
|
3515 } |
|
e8b0b0392037
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diff
changeset
|
3516 |
|
e8b0b0392037
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diff
changeset
|
3517 void G1CollectedHeap::print_all_rsets() { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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3774
diff
changeset
|
3518 PrintRSetsClosure cl("Printing All RSets");; |
|
e8b0b0392037
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parents:
3774
diff
changeset
|
3519 heap_region_iterate(&cl); |
|
e8b0b0392037
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3774
diff
changeset
|
3520 } |
|
e8b0b0392037
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diff
changeset
|
3521 #endif // PRODUCT |
|
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3774
diff
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|
3522 |
| 342 | 3523 G1CollectedHeap* G1CollectedHeap::heap() { |
| 3524 assert(_sh->kind() == CollectedHeap::G1CollectedHeap, | |
| 3525 "not a garbage-first heap"); | |
| 3526 return _g1h; | |
| 3527 } | |
| 3528 | |
| 3529 void G1CollectedHeap::gc_prologue(bool full /* Ignored */) { | |
|
1245
6484c4ee11cb
6904516: More object array barrier fixes, following up on 6906727
ysr
parents:
1166
diff
changeset
|
3530 // always_do_update_barrier = false; |
| 342 | 3531 assert(InlineCacheBuffer::is_empty(), "should have cleaned up ICBuffer"); |
| 3532 // Call allocation profiler | |
| 3533 AllocationProfiler::iterate_since_last_gc(); | |
| 3534 // Fill TLAB's and such | |
| 3535 ensure_parsability(true); | |
| 3536 } | |
| 3537 | |
| 3538 void G1CollectedHeap::gc_epilogue(bool full /* Ignored */) { | |
| 3539 // FIXME: what is this about? | |
| 3540 // I'm ignoring the "fill_newgen()" call if "alloc_event_enabled" | |
| 3541 // is set. | |
| 3542 COMPILER2_PRESENT(assert(DerivedPointerTable::is_empty(), | |
| 3543 "derived pointer present")); | |
|
1245
6484c4ee11cb
6904516: More object array barrier fixes, following up on 6906727
ysr
parents:
1166
diff
changeset
|
3544 // always_do_update_barrier = true; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3545 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3546 // We have just completed a GC. Update the soft reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3547 // policy with the new heap occupancy |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3548 Universe::update_heap_info_at_gc(); |
| 342 | 3549 } |
| 3550 | |
| 1973 | 3551 HeapWord* G1CollectedHeap::do_collection_pause(size_t word_size, |
| 3552 unsigned int gc_count_before, | |
| 3553 bool* succeeded) { | |
| 3554 assert_heap_not_locked_and_not_at_safepoint(); | |
| 342 | 3555 g1_policy()->record_stop_world_start(); |
| 1973 | 3556 VM_G1IncCollectionPause op(gc_count_before, |
| 3557 word_size, | |
| 3558 false, /* should_initiate_conc_mark */ | |
| 3559 g1_policy()->max_pause_time_ms(), | |
| 3560 GCCause::_g1_inc_collection_pause); | |
| 3561 VMThread::execute(&op); | |
| 3562 | |
| 3563 HeapWord* result = op.result(); | |
| 3564 bool ret_succeeded = op.prologue_succeeded() && op.pause_succeeded(); | |
| 3565 assert(result == NULL || ret_succeeded, | |
| 3566 "the result should be NULL if the VM did not succeed"); | |
| 3567 *succeeded = ret_succeeded; | |
| 3568 | |
| 3569 assert_heap_not_locked(); | |
| 3570 return result; | |
| 342 | 3571 } |
| 3572 | |
| 3573 void | |
| 3574 G1CollectedHeap::doConcurrentMark() { | |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
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838
diff
changeset
|
3575 MutexLockerEx x(CGC_lock, Mutex::_no_safepoint_check_flag); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
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838
diff
changeset
|
3576 if (!_cmThread->in_progress()) { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3577 _cmThread->set_started(); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3578 CGC_lock->notify(); |
| 342 | 3579 } |
| 3580 } | |
| 3581 | |
| 3582 size_t G1CollectedHeap::pending_card_num() { | |
| 3583 size_t extra_cards = 0; | |
| 3584 JavaThread *curr = Threads::first(); | |
| 3585 while (curr != NULL) { | |
| 3586 DirtyCardQueue& dcq = curr->dirty_card_queue(); | |
| 3587 extra_cards += dcq.size(); | |
| 3588 curr = curr->next(); | |
| 3589 } | |
| 3590 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
| 3591 size_t buffer_size = dcqs.buffer_size(); | |
| 3592 size_t buffer_num = dcqs.completed_buffers_num(); | |
| 6611 | 3593 |
| 3594 // PtrQueueSet::buffer_size() and PtrQueue:size() return sizes | |
| 3595 // in bytes - not the number of 'entries'. We need to convert | |
| 3596 // into a number of cards. | |
| 3597 return (buffer_size * buffer_num + extra_cards) / oopSize; | |
| 342 | 3598 } |
| 3599 | |
| 3600 size_t G1CollectedHeap::cards_scanned() { | |
| 1861 | 3601 return g1_rem_set()->cardsScanned(); |
| 342 | 3602 } |
| 3603 | |
| 3604 void | |
| 3605 G1CollectedHeap::setup_surviving_young_words() { | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
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6008
diff
changeset
|
3606 assert(_surviving_young_words == NULL, "pre-condition"); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3607 uint array_length = g1_policy()->young_cset_region_length(); |
| 6197 | 3608 _surviving_young_words = NEW_C_HEAP_ARRAY(size_t, (size_t) array_length, mtGC); |
| 342 | 3609 if (_surviving_young_words == NULL) { |
| 3610 vm_exit_out_of_memory(sizeof(size_t) * array_length, | |
| 3611 "Not enough space for young surv words summary."); | |
| 3612 } | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3613 memset(_surviving_young_words, 0, (size_t) array_length * sizeof(size_t)); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
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parents:
838
diff
changeset
|
3614 #ifdef ASSERT |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3615 for (uint i = 0; i < array_length; ++i) { |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3616 assert( _surviving_young_words[i] == 0, "memset above" ); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
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diff
changeset
|
3617 } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
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diff
changeset
|
3618 #endif // !ASSERT |
| 342 | 3619 } |
| 3620 | |
| 3621 void | |
| 3622 G1CollectedHeap::update_surviving_young_words(size_t* surv_young_words) { | |
| 3623 MutexLockerEx x(ParGCRareEvent_lock, Mutex::_no_safepoint_check_flag); | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3624 uint array_length = g1_policy()->young_cset_region_length(); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3625 for (uint i = 0; i < array_length; ++i) { |
| 342 | 3626 _surviving_young_words[i] += surv_young_words[i]; |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3627 } |
| 342 | 3628 } |
| 3629 | |
| 3630 void | |
| 3631 G1CollectedHeap::cleanup_surviving_young_words() { | |
| 3632 guarantee( _surviving_young_words != NULL, "pre-condition" ); | |
| 6197 | 3633 FREE_C_HEAP_ARRAY(size_t, _surviving_young_words, mtGC); |
| 342 | 3634 _surviving_young_words = NULL; |
| 3635 } | |
| 3636 | |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3637 #ifdef ASSERT |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3638 class VerifyCSetClosure: public HeapRegionClosure { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3639 public: |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3640 bool doHeapRegion(HeapRegion* hr) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3641 // Here we check that the CSet region's RSet is ready for parallel |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3642 // iteration. The fields that we'll verify are only manipulated |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3643 // when the region is part of a CSet and is collected. Afterwards, |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3644 // we reset these fields when we clear the region's RSet (when the |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3645 // region is freed) so they are ready when the region is |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3646 // re-allocated. The only exception to this is if there's an |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3647 // evacuation failure and instead of freeing the region we leave |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3648 // it in the heap. In that case, we reset these fields during |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3649 // evacuation failure handling. |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3650 guarantee(hr->rem_set()->verify_ready_for_par_iteration(), "verification"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3651 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3652 // Here's a good place to add any other checks we'd like to |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3653 // perform on CSet regions. |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3654 return false; |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3655 } |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3656 }; |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3657 #endif // ASSERT |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3658 |
| 1709 | 3659 #if TASKQUEUE_STATS |
| 3660 void G1CollectedHeap::print_taskqueue_stats_hdr(outputStream* const st) { | |
| 3661 st->print_raw_cr("GC Task Stats"); | |
| 3662 st->print_raw("thr "); TaskQueueStats::print_header(1, st); st->cr(); | |
| 3663 st->print_raw("--- "); TaskQueueStats::print_header(2, st); st->cr(); | |
| 3664 } | |
| 3665 | |
| 3666 void G1CollectedHeap::print_taskqueue_stats(outputStream* const st) const { | |
| 3667 print_taskqueue_stats_hdr(st); | |
| 3668 | |
| 3669 TaskQueueStats totals; | |
|
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3670 const int n = workers() != NULL ? workers()->total_workers() : 1; |
| 1709 | 3671 for (int i = 0; i < n; ++i) { |
| 3672 st->print("%3d ", i); task_queue(i)->stats.print(st); st->cr(); | |
| 3673 totals += task_queue(i)->stats; | |
| 3674 } | |
| 3675 st->print_raw("tot "); totals.print(st); st->cr(); | |
| 3676 | |
| 3677 DEBUG_ONLY(totals.verify()); | |
| 3678 } | |
| 3679 | |
| 3680 void G1CollectedHeap::reset_taskqueue_stats() { | |
|
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3681 const int n = workers() != NULL ? workers()->total_workers() : 1; |
| 1709 | 3682 for (int i = 0; i < n; ++i) { |
| 3683 task_queue(i)->stats.reset(); | |
| 3684 } | |
| 3685 } | |
| 3686 #endif // TASKQUEUE_STATS | |
| 3687 | |
| 1973 | 3688 bool |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3689 G1CollectedHeap::do_collection_pause_at_safepoint(double target_pause_time_ms) { |
| 2152 | 3690 assert_at_safepoint(true /* should_be_vm_thread */); |
| 3691 guarantee(!is_gc_active(), "collection is not reentrant"); | |
| 3692 | |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3693 if (GC_locker::check_active_before_gc()) { |
| 1973 | 3694 return false; |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3695 } |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3696 |
|
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2039
diff
changeset
|
3697 SvcGCMarker sgcm(SvcGCMarker::MINOR); |
|
2039
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3698 ResourceMark rm; |
|
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3699 |
|
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4787
diff
changeset
|
3700 print_heap_before_gc(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3701 |
| 4072 | 3702 HRSPhaseSetter x(HRSPhaseEvacuation); |
| 2152 | 3703 verify_region_sets_optional(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3704 verify_dirty_young_regions(); |
| 2152 | 3705 |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3706 // This call will decide whether this pause is an initial-mark |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3707 // pause. If it is, during_initial_mark_pause() will return true |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3708 // for the duration of this pause. |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3709 g1_policy()->decide_on_conc_mark_initiation(); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3710 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3711 // We do not allow initial-mark to be piggy-backed on a mixed GC. |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3712 assert(!g1_policy()->during_initial_mark_pause() || |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3713 g1_policy()->gcs_are_young(), "sanity"); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3714 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3715 // 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
|
3716 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
|
3717 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3718 // 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
|
3719 // 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
|
3720 // 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
|
3721 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
|
3722 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3723 // 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
|
3724 { |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3725 if (g1_policy()->during_initial_mark_pause()) { |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3726 // 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
|
3727 // full collection counter. |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
3728 increment_old_marking_cycles_started(); |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3729 } |
|
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
3730 // if the log level is "finer" is on, we'll print long statistics information |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3731 // 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
|
3732 // is messy if we do. |
|
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
3733 gclog_or_tty->date_stamp(G1Log::fine() && PrintGCDateStamps); |
|
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
3734 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
| 6030 | 3735 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3736 int active_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3737 workers()->active_workers() : 1); |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3738 g1_policy()->phase_times()->note_gc_start(os::elapsedTime(), active_workers, |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3739 g1_policy()->gcs_are_young(), g1_policy()->during_initial_mark_pause(), gc_cause()); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3740 |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
3741 TraceCollectorStats tcs(g1mm()->incremental_collection_counters()); |
|
3356
78542e2b5e35
7036199: Adding a notification to the implementation of GarbageCollectorMXBeans
fparain
parents:
3323
diff
changeset
|
3742 TraceMemoryManagerStats tms(false /* fullGC */, gc_cause()); |
|
1089
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
tonyp
parents:
1088
diff
changeset
|
3743 |
| 2361 | 3744 // If the secondary_free_list is not empty, append it to the |
| 3745 // free_list. No need to wait for the cleanup operation to finish; | |
| 3746 // the region allocation code will check the secondary_free_list | |
| 3747 // and wait if necessary. If the G1StressConcRegionFreeing flag is | |
| 3748 // set, skip this step so that the region allocation code has to | |
| 3749 // get entries from the secondary_free_list. | |
| 2152 | 3750 if (!G1StressConcRegionFreeing) { |
| 2361 | 3751 append_secondary_free_list_if_not_empty_with_lock(); |
| 2152 | 3752 } |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3753 |
|
3867
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
3754 assert(check_young_list_well_formed(), |
|
ff53346271fe
6814390: G1: remove the concept of non-generational G1
brutisso
parents:
3830
diff
changeset
|
3755 "young list should be well formed"); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3756 |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3757 // 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
|
3758 // 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
|
3759 // it will be set. |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3760 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3761 { // 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
|
3762 IsGCActiveMark x; |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3763 |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3764 gc_prologue(false); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3765 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
|
3766 increment_gc_time_stamp(); |
| 342 | 3767 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3768 if (VerifyBeforeGC && total_collections() >= VerifyGCStartAt) { |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3769 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
|
3770 gclog_or_tty->print(" VerifyBeforeGC:"); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3771 prepare_for_verify(); |
| 6008 | 3772 Universe::verify(/* silent */ false, |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3773 /* option */ VerifyOption_G1UsePrevMarking); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3774 } |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3775 |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3776 COMPILER2_PRESENT(DerivedPointerTable::clear()); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3777 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3778 // Please see comment in g1CollectedHeap.hpp and |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3779 // G1CollectedHeap::ref_processing_init() to see how |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3780 // reference processing currently works in G1. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3781 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3782 // Enable discovery in the STW reference processor |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3783 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3784 true /*verify_no_refs*/); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3785 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3786 { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3787 // We want to temporarily turn off discovery by the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3788 // CM ref processor, if necessary, and turn it back on |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3789 // on again later if we do. Using a scoped |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3790 // NoRefDiscovery object will do this. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3791 NoRefDiscovery no_cm_discovery(ref_processor_cm()); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3792 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3793 // 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
|
3794 // of the collection set!). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3795 release_mutator_alloc_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 // We should call this after we retire the mutator alloc |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3798 // region(s) so that all the ALLOC / RETIRE events are generated |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3799 // before the start GC event. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3800 _hr_printer.start_gc(false /* full */, (size_t) total_collections()); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3801 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3802 // This timing is only used by the ergonomics to handle our pause target. |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3803 // It is unclear why this should not include the full pause. We will |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3804 // investigate this in CR 7178365. |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3805 // |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3806 // Preserving the old comment here if that helps the investigation: |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3807 // |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3808 // The elapsed time induced by the start time below deliberately elides |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3809 // the possible verification above. |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3810 double sample_start_time_sec = os::elapsedTime(); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3811 size_t start_used_bytes = used(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3812 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3813 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3814 gclog_or_tty->print_cr("\nBefore recording pause start.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3815 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3816 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
|
3817 #endif // YOUNG_LIST_VERBOSE |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3818 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3819 g1_policy()->record_collection_pause_start(sample_start_time_sec, |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3820 start_used_bytes); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3821 |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3822 double scan_wait_start = os::elapsedTime(); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3823 // 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
|
3824 // 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
|
3825 // 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
|
3826 // moving them during the GC. |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3827 bool waited = _cm->root_regions()->wait_until_scan_finished(); |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3828 double wait_time_ms = 0.0; |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3829 if (waited) { |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3830 double scan_wait_end = os::elapsedTime(); |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3831 wait_time_ms = (scan_wait_end - scan_wait_start) * 1000.0; |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3832 } |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3833 g1_policy()->phase_times()->record_root_region_scan_wait_time(wait_time_ms); |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3834 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3835 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3836 gclog_or_tty->print_cr("\nAfter recording pause start.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3837 _young_list->print(); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3838 #endif // YOUNG_LIST_VERBOSE |
| 342 | 3839 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3840 if (g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3841 concurrent_mark()->checkpointRootsInitialPre(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3842 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3843 perm_gen()->save_marks(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3844 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3845 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3846 gclog_or_tty->print_cr("\nBefore choosing collection set.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3847 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3848 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
|
3849 #endif // YOUNG_LIST_VERBOSE |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3850 |
|
4912
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4910
diff
changeset
|
3851 g1_policy()->finalize_cset(target_pause_time_ms); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3852 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3853 _cm->note_start_of_gc(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3854 // 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
|
3855 // we have not filtered them yet (we'll do so during the |
|
4912
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4910
diff
changeset
|
3856 // GC). We also call this after finalize_cset() to |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3857 // ensure that the CSet has been finalized. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3858 _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
|
3859 true /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3860 false /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3861 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3862 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3863 if (_hr_printer.is_active()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3864 HeapRegion* hr = g1_policy()->collection_set(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3865 while (hr != NULL) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3866 G1HRPrinter::RegionType type; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3867 if (!hr->is_young()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3868 type = G1HRPrinter::Old; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3869 } else if (hr->is_survivor()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3870 type = G1HRPrinter::Survivor; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3871 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3872 type = G1HRPrinter::Eden; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3873 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3874 _hr_printer.cset(hr); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3875 hr = hr->next_in_collection_set(); |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
3876 } |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
3877 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3878 |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3879 #ifdef ASSERT |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3880 VerifyCSetClosure cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3881 collection_set_iterate(&cl); |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3882 #endif // ASSERT |
| 1707 | 3883 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3884 setup_surviving_young_words(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3885 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3886 // Initialize the GC alloc regions. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3887 init_gc_alloc_regions(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3888 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3889 // Actually do the work... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3890 evacuate_collection_set(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3891 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3892 // 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
|
3893 // (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
|
3894 // 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
|
3895 // 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
|
3896 // we checked. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3897 _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
|
3898 false /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3899 true /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3900 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3901 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3902 free_collection_set(g1_policy()->collection_set()); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3903 g1_policy()->clear_collection_set(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3904 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3905 cleanup_surviving_young_words(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3906 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3907 // Start a new incremental collection set for the next pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3908 g1_policy()->start_incremental_cset_building(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3909 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3910 // Clear the _cset_fast_test bitmap in anticipation of adding |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3911 // regions to the incremental collection set for the next |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3912 // evacuation pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3913 clear_cset_fast_test(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3914 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3915 _young_list->reset_sampled_info(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3916 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3917 // Don't check the whole heap at this point as the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3918 // GC alloc regions from this pause have been tagged |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3919 // as survivors and moved on to the survivor list. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3920 // Survivor regions will fail the !is_young() check. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3921 assert(check_young_list_empty(false /* check_heap */), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3922 "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
|
3923 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3924 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3925 gclog_or_tty->print_cr("Before recording survivors.\nYoung List:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3926 _young_list->print(); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3927 #endif // YOUNG_LIST_VERBOSE |
| 342 | 3928 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3929 g1_policy()->record_survivor_regions(_young_list->survivor_length(), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3930 _young_list->first_survivor_region(), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3931 _young_list->last_survivor_region()); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3932 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3933 _young_list->reset_auxilary_lists(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3934 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3935 if (evacuation_failed()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3936 _summary_bytes_used = recalculate_used(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3937 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3938 // The "used" of the the collection set have already been subtracted |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3939 // when they were freed. Add in the bytes evacuated. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3940 _summary_bytes_used += g1_policy()->bytes_copied_during_gc(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3941 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3942 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3943 if (g1_policy()->during_initial_mark_pause()) { |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3944 // 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
|
3945 // 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
|
3946 // appropriate initialization is done on the CM object. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3947 concurrent_mark()->checkpointRootsInitialPost(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3948 set_marking_started(); |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3949 // 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
|
3950 // 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
|
3951 // the current thread has completed its logging output. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3952 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3953 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3954 allocate_dummy_regions(); |
|
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
3955 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3956 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3957 gclog_or_tty->print_cr("\nEnd of the pause.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3958 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3959 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
|
3960 #endif // YOUNG_LIST_VERBOSE |
| 342 | 3961 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3962 init_mutator_alloc_region(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3963 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3964 { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3965 size_t expand_bytes = g1_policy()->expansion_amount(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3966 if (expand_bytes > 0) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3967 size_t bytes_before = capacity(); |
| 4785 | 3968 // No need for an ergo verbose message here, |
| 3969 // expansion_amount() does this when it returns a value > 0. | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3970 if (!expand(expand_bytes)) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3971 // We failed to expand the heap so let's verify that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3972 // committed/uncommitted amount match the backing store |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3973 assert(capacity() == _g1_storage.committed_size(), "committed size mismatch"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3974 assert(max_capacity() == _g1_storage.reserved_size(), "reserved size mismatch"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3975 } |
|
3920
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
3976 } |
|
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
3977 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3978 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3979 // 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
|
3980 // 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
|
3981 _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
|
3982 true /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3983 true /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3984 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3985 _cm->note_end_of_gc(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
3986 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3987 // Collect thread local data to allow the ergonomics to use |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3988 // the collected information |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3989 g1_policy()->phase_times()->collapse_par_times(); |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3990 |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3991 // This timing is only used by the ergonomics to handle our pause target. |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3992 // It is unclear why this should not include the full pause. We will |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3993 // investigate this in CR 7178365. |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3994 double sample_end_time_sec = os::elapsedTime(); |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3995 double pause_time_ms = (sample_end_time_sec - sample_start_time_sec) * MILLIUNITS; |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3996 g1_policy()->record_collection_pause_end(pause_time_ms); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3997 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3998 MemoryService::track_memory_usage(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3999 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4000 // 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
|
4001 // update buffers to bring the RSets up-to-date if |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4002 // G1HRRSFlushLogBuffersOnVerify has been set. While scanning |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4003 // 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
|
4004 // regions we just allocated to (i.e., the GC alloc |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4005 // regions). However, during the last GC we called |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4006 // set_saved_mark() on all the GC alloc regions, so card |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4007 // scanning might skip the [saved_mark_word()...top()] area of |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4008 // those regions (i.e., the area we allocated objects into |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4009 // during the last GC). But it shouldn't. Given that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4010 // saved_mark_word() is conditional on whether the GC time stamp |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4011 // 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
|
4012 // 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
|
4013 // regions and saved_mark_word() will simply return top() for |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4014 // 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
|
4015 // than iterating over the regions and fixing them. In fact, the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4016 // GC time stamp increment here also ensures that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4017 // saved_mark_word() will return top() between pauses, i.e., |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4018 // during concurrent refinement. So we don't need the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4019 // is_gc_active() check to decided which top to use when |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4020 // scanning cards (see CR 7039627). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4021 increment_gc_time_stamp(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4022 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4023 if (VerifyAfterGC && total_collections() >= VerifyGCStartAt) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4024 HandleMark hm; // Discard invalid handles created during verification |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4025 gclog_or_tty->print(" VerifyAfterGC:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4026 prepare_for_verify(); |
| 6008 | 4027 Universe::verify(/* silent */ false, |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4028 /* option */ VerifyOption_G1UsePrevMarking); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4029 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4030 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4031 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4032 ref_processor_stw()->verify_no_references_recorded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4033 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4034 // 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
|
4035 } |
|
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4036 |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4037 // 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
|
4038 // 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
|
4039 // 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
|
4040 // RETIRE events are generated before the end GC event. |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4041 _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
|
4042 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4043 if (mark_in_progress()) { |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4044 concurrent_mark()->update_g1_committed(); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4045 } |
|
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4046 |
|
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4047 #ifdef TRACESPINNING |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4048 ParallelTaskTerminator::print_termination_counts(); |
|
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4049 #endif |
| 342 | 4050 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4051 gc_epilogue(false); |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4052 |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4053 g1_policy()->phase_times()->note_gc_end(os::elapsedTime()); |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4054 |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4055 // We have to do this after we decide whether to expand the heap or not. |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4056 g1_policy()->print_heap_transition(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4057 } |
|
6121
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4058 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4059 // It is not yet to safe to tell the concurrent mark to |
|
6121
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4060 // start as we have some optional output below. We don't want the |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4061 // output from the concurrent mark thread interfering with this |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4062 // logging output either. |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4063 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4064 _hrs.verify_optional(); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4065 verify_region_sets_optional(); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4066 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4067 TASKQUEUE_STATS_ONLY(if (ParallelGCVerbose) print_taskqueue_stats()); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4068 TASKQUEUE_STATS_ONLY(reset_taskqueue_stats()); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4069 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4070 print_heap_after_gc(); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4071 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4072 // We must call G1MonitoringSupport::update_sizes() in the same scoping level |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4073 // as an active TraceMemoryManagerStats object (i.e. before the destructor for the |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4074 // TraceMemoryManagerStats is called) so that the G1 memory pools are updated |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4075 // before any GC notifications are raised. |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4076 g1mm()->update_sizes(); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4077 } |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
4078 |
|
884
83b687ce3090
6866591: G1: print update buffer processing stats more often
tonyp
parents:
883
diff
changeset
|
4079 if (G1SummarizeRSetStats && |
|
83b687ce3090
6866591: G1: print update buffer processing stats more often
tonyp
parents:
883
diff
changeset
|
4080 (G1SummarizeRSetStatsPeriod > 0) && |
|
83b687ce3090
6866591: G1: print update buffer processing stats more often
tonyp
parents:
883
diff
changeset
|
4081 (total_collections() % G1SummarizeRSetStatsPeriod == 0)) { |
|
83b687ce3090
6866591: G1: print update buffer processing stats more often
tonyp
parents:
883
diff
changeset
|
4082 g1_rem_set()->print_summary_info(); |
|
83b687ce3090
6866591: G1: print update buffer processing stats more often
tonyp
parents:
883
diff
changeset
|
4083 } |
| 1973 | 4084 |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4085 // 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
|
4086 // 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
|
4087 // that came from the pause. |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4088 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4089 if (should_start_conc_mark) { |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4090 // CAUTION: after the doConcurrentMark() call below, |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4091 // the concurrent marking thread(s) could be running |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4092 // concurrently with us. Make sure that anything after |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4093 // 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
|
4094 // 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
|
4095 // 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
|
4096 // ConcurrentGCThread::safepoint_desynchronize(). |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4097 doConcurrentMark(); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4098 } |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4099 |
| 1973 | 4100 return true; |
| 342 | 4101 } |
| 4102 | |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4103 size_t G1CollectedHeap::desired_plab_sz(GCAllocPurpose purpose) |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4104 { |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4105 size_t gclab_word_size; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4106 switch (purpose) { |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4107 case GCAllocForSurvived: |
| 6595 | 4108 gclab_word_size = _survivor_plab_stats.desired_plab_sz(); |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4109 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4110 case GCAllocForTenured: |
| 6595 | 4111 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4112 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4113 default: |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4114 assert(false, "unknown GCAllocPurpose"); |
| 6595 | 4115 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4116 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4117 } |
| 6595 | 4118 |
| 4119 // Prevent humongous PLAB sizes for two reasons: | |
| 4120 // * PLABs are allocated using a similar paths as oops, but should | |
| 4121 // never be in a humongous region | |
| 4122 // * Allowing humongous PLABs needlessly churns the region free lists | |
| 4123 return MIN2(_humongous_object_threshold_in_words, gclab_word_size); | |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4124 } |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4125 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4126 void G1CollectedHeap::init_mutator_alloc_region() { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4127 assert(_mutator_alloc_region.get() == NULL, "pre-condition"); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4128 _mutator_alloc_region.init(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4129 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4130 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4131 void G1CollectedHeap::release_mutator_alloc_region() { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4132 _mutator_alloc_region.release(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4133 assert(_mutator_alloc_region.get() == NULL, "post-condition"); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4134 } |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4135 |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4136 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
|
4137 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
|
4138 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4139 _survivor_gc_alloc_region.init(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4140 _old_gc_alloc_region.init(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4141 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
|
4142 _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
|
4143 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4144 // 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
|
4145 // 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
|
4146 // 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
|
4147 // 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
|
4148 // 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
|
4149 // 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
|
4150 // 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
|
4151 // 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
|
4152 // 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
|
4153 if (retained_region != NULL && |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4154 !retained_region->in_collection_set() && |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4155 !(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
|
4156 !retained_region->is_empty() && |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4157 !retained_region->isHumongous()) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4158 retained_region->set_saved_mark(); |
| 4072 | 4159 // The retained region was added to the old region set when it was |
| 4160 // retired. We have to remove it now, since we don't allow regions | |
| 4161 // we allocate to in the region sets. We'll re-add it later, when | |
| 4162 // it's retired again. | |
| 4163 _old_set.remove(retained_region); | |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4164 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
|
4165 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
|
4166 _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
|
4167 _hr_printer.reuse(retained_region); |
| 342 | 4168 } |
| 4169 } | |
| 4170 | |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4171 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
|
4172 _survivor_gc_alloc_region.release(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4173 // 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
|
4174 // _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
|
4175 // _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
|
4176 // 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
|
4177 // condition. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4178 _retained_old_gc_alloc_region = _old_gc_alloc_region.release(); |
| 6595 | 4179 |
| 4180 if (ResizePLAB) { | |
| 4181 _survivor_plab_stats.adjust_desired_plab_sz(); | |
| 4182 _old_plab_stats.adjust_desired_plab_sz(); | |
| 4183 } | |
| 342 | 4184 } |
| 4185 | |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4186 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
|
4187 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
|
4188 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
|
4189 _retained_old_gc_alloc_region = NULL; |
| 342 | 4190 } |
| 4191 | |
| 4192 void G1CollectedHeap::init_for_evac_failure(OopsInHeapRegionClosure* cl) { | |
| 4193 _drain_in_progress = false; | |
| 4194 set_evac_failure_closure(cl); | |
| 6197 | 4195 _evac_failure_scan_stack = new (ResourceObj::C_HEAP, mtGC) GrowableArray<oop>(40, true); |
| 342 | 4196 } |
| 4197 | |
| 4198 void G1CollectedHeap::finalize_for_evac_failure() { | |
| 4199 assert(_evac_failure_scan_stack != NULL && | |
| 4200 _evac_failure_scan_stack->length() == 0, | |
| 4201 "Postcondition"); | |
| 4202 assert(!_drain_in_progress, "Postcondition"); | |
| 1045 | 4203 delete _evac_failure_scan_stack; |
| 342 | 4204 _evac_failure_scan_stack = NULL; |
| 4205 } | |
| 4206 | |
| 4207 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
|
4208 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
|
4209 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4210 G1ParRemoveSelfForwardPtrsTask rsfp_task(this); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4211 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4212 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4213 set_par_threads(); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4214 workers()->run_task(&rsfp_task); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4215 set_par_threads(0); |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
4216 } else { |
|
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4217 rsfp_task.work(0); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4218 } |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4219 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4220 assert(check_cset_heap_region_claim_values(HeapRegion::ParEvacFailureClaimValue), "sanity"); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4221 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4222 // 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
|
4223 reset_cset_heap_region_claim_values(); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4224 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4225 assert(check_cset_heap_region_claim_values(HeapRegion::InitialClaimValue), "sanity"); |
| 342 | 4226 |
| 4227 // Now restore saved marks, if any. | |
| 4228 if (_objs_with_preserved_marks != NULL) { | |
| 4229 assert(_preserved_marks_of_objs != NULL, "Both or none."); | |
| 4230 guarantee(_objs_with_preserved_marks->length() == | |
| 4231 _preserved_marks_of_objs->length(), "Both or none."); | |
| 4232 for (int i = 0; i < _objs_with_preserved_marks->length(); i++) { | |
| 4233 oop obj = _objs_with_preserved_marks->at(i); | |
| 4234 markOop m = _preserved_marks_of_objs->at(i); | |
| 4235 obj->set_mark(m); | |
| 4236 } | |
|
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4237 |
| 342 | 4238 // Delete the preserved marks growable arrays (allocated on the C heap). |
| 4239 delete _objs_with_preserved_marks; | |
| 4240 delete _preserved_marks_of_objs; | |
| 4241 _objs_with_preserved_marks = NULL; | |
| 4242 _preserved_marks_of_objs = NULL; | |
| 4243 } | |
| 4244 } | |
| 4245 | |
| 4246 void G1CollectedHeap::push_on_evac_failure_scan_stack(oop obj) { | |
| 4247 _evac_failure_scan_stack->push(obj); | |
| 4248 } | |
| 4249 | |
| 4250 void G1CollectedHeap::drain_evac_failure_scan_stack() { | |
| 4251 assert(_evac_failure_scan_stack != NULL, "precondition"); | |
| 4252 | |
| 4253 while (_evac_failure_scan_stack->length() > 0) { | |
| 4254 oop obj = _evac_failure_scan_stack->pop(); | |
| 4255 _evac_failure_closure->set_region(heap_region_containing(obj)); | |
| 4256 obj->oop_iterate_backwards(_evac_failure_closure); | |
| 4257 } | |
| 4258 } | |
| 4259 | |
| 4260 oop | |
| 4261 G1CollectedHeap::handle_evacuation_failure_par(OopsInHeapRegionClosure* cl, | |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4262 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
|
4263 assert(obj_in_cs(old), |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
3317
diff
changeset
|
4264 err_msg("obj: "PTR_FORMAT" should still be in the CSet", |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
3317
diff
changeset
|
4265 (HeapWord*) old)); |
| 342 | 4266 markOop m = old->mark(); |
| 4267 oop forward_ptr = old->forward_to_atomic(old); | |
| 4268 if (forward_ptr == NULL) { | |
| 4269 // Forward-to-self succeeded. | |
|
3973
663cb89032b1
7092412: G1: Some roots not marked during an initial mark that gets an evacuation failure
johnc
parents:
3920
diff
changeset
|
4270 |
| 342 | 4271 if (_evac_failure_closure != cl) { |
| 4272 MutexLockerEx x(EvacFailureStack_lock, Mutex::_no_safepoint_check_flag); | |
| 4273 assert(!_drain_in_progress, | |
| 4274 "Should only be true while someone holds the lock."); | |
| 4275 // Set the global evac-failure closure to the current thread's. | |
| 4276 assert(_evac_failure_closure == NULL, "Or locking has failed."); | |
| 4277 set_evac_failure_closure(cl); | |
| 4278 // Now do the common part. | |
| 4279 handle_evacuation_failure_common(old, m); | |
| 4280 // Reset to NULL. | |
| 4281 set_evac_failure_closure(NULL); | |
| 4282 } else { | |
| 4283 // The lock is already held, and this is recursive. | |
| 4284 assert(_drain_in_progress, "This should only be the recursive case."); | |
| 4285 handle_evacuation_failure_common(old, m); | |
| 4286 } | |
| 4287 return old; | |
| 4288 } else { | |
|
3323
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
3317
diff
changeset
|
4289 // Forward-to-self failed. Either someone else managed to allocate |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
3317
diff
changeset
|
4290 // space for this object (old != forward_ptr) or they beat us in |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
3317
diff
changeset
|
4291 // self-forwarding it (old == forward_ptr). |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
3317
diff
changeset
|
4292 assert(old == forward_ptr || !obj_in_cs(forward_ptr), |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
3317
diff
changeset
|
4293 err_msg("obj: "PTR_FORMAT" forwarded to: "PTR_FORMAT" " |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
3317
diff
changeset
|
4294 "should not be in the CSet", |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
3317
diff
changeset
|
4295 (HeapWord*) old, (HeapWord*) forward_ptr)); |
| 342 | 4296 return forward_ptr; |
| 4297 } | |
| 4298 } | |
| 4299 | |
| 4300 void G1CollectedHeap::handle_evacuation_failure_common(oop old, markOop m) { | |
| 4301 set_evacuation_failed(true); | |
| 4302 | |
| 4303 preserve_mark_if_necessary(old, m); | |
| 4304 | |
| 4305 HeapRegion* r = heap_region_containing(old); | |
| 4306 if (!r->evacuation_failed()) { | |
| 4307 r->set_evacuation_failed(true); | |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4308 _hr_printer.evac_failure(r); |
| 342 | 4309 } |
| 4310 | |
| 4311 push_on_evac_failure_scan_stack(old); | |
| 4312 | |
| 4313 if (!_drain_in_progress) { | |
| 4314 // prevent recursion in copy_to_survivor_space() | |
| 4315 _drain_in_progress = true; | |
| 4316 drain_evac_failure_scan_stack(); | |
| 4317 _drain_in_progress = false; | |
| 4318 } | |
| 4319 } | |
| 4320 | |
| 4321 void G1CollectedHeap::preserve_mark_if_necessary(oop obj, markOop m) { | |
|
2038
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4322 assert(evacuation_failed(), "Oversaving!"); |
|
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4323 // We want to call the "for_promotion_failure" version only in the |
|
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4324 // case of a promotion failure. |
|
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4325 if (m->must_be_preserved_for_promotion_failure(obj)) { |
| 342 | 4326 if (_objs_with_preserved_marks == NULL) { |
| 4327 assert(_preserved_marks_of_objs == NULL, "Both or none."); | |
| 4328 _objs_with_preserved_marks = | |
| 6197 | 4329 new (ResourceObj::C_HEAP, mtGC) GrowableArray<oop>(40, true); |
| 342 | 4330 _preserved_marks_of_objs = |
| 6197 | 4331 new (ResourceObj::C_HEAP, mtGC) GrowableArray<markOop>(40, true); |
| 342 | 4332 } |
| 4333 _objs_with_preserved_marks->push(obj); | |
| 4334 _preserved_marks_of_objs->push(m); | |
| 4335 } | |
| 4336 } | |
| 4337 | |
| 4338 HeapWord* G1CollectedHeap::par_allocate_during_gc(GCAllocPurpose purpose, | |
| 4339 size_t word_size) { | |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4340 if (purpose == GCAllocForSurvived) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4341 HeapWord* result = survivor_attempt_allocation(word_size); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4342 if (result != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4343 return result; |
| 342 | 4344 } else { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4345 // 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
|
4346 // object there. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4347 return old_attempt_allocation(word_size); |
| 342 | 4348 } |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4349 } else { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4350 assert(purpose == GCAllocForTenured, "sanity"); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4351 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
|
4352 if (result != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4353 return result; |
| 342 | 4354 } else { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4355 // 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
|
4356 // object there. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4357 return survivor_attempt_allocation(word_size); |
| 342 | 4358 } |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4359 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4360 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4361 ShouldNotReachHere(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4362 // 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
|
4363 return NULL; |
| 342 | 4364 } |
| 4365 | |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4366 G1ParGCAllocBuffer::G1ParGCAllocBuffer(size_t gclab_word_size) : |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4367 ParGCAllocBuffer(gclab_word_size), _retired(false) { } |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4368 |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4369 G1ParScanThreadState::G1ParScanThreadState(G1CollectedHeap* g1h, uint queue_num) |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4370 : _g1h(g1h), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4371 _refs(g1h->task_queue(queue_num)), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4372 _dcq(&g1h->dirty_card_queue_set()), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4373 _ct_bs((CardTableModRefBS*)_g1h->barrier_set()), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4374 _g1_rem(g1h->g1_rem_set()), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4375 _hash_seed(17), _queue_num(queue_num), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4376 _term_attempts(0), |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4377 _surviving_alloc_buffer(g1h->desired_plab_sz(GCAllocForSurvived)), |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4378 _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
|
4379 _age_table(false), |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4380 _strong_roots_time(0), _term_time(0), |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4381 _alloc_buffer_waste(0), _undo_waste(0) { |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4382 // we allocate G1YoungSurvRateNumRegions plus one entries, since |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4383 // 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
|
4384 // non-young regions (where the age is -1) |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4385 // 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
|
4386 // an attempt to eliminate cache contention |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4387 uint real_length = 1 + _g1h->g1_policy()->young_cset_region_length(); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4388 uint array_length = PADDING_ELEM_NUM + |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4389 real_length + |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4390 PADDING_ELEM_NUM; |
| 6197 | 4391 _surviving_young_words_base = NEW_C_HEAP_ARRAY(size_t, array_length, mtGC); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4392 if (_surviving_young_words_base == NULL) |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4393 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
|
4394 "Not enough space for young surv histo."); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4395 _surviving_young_words = _surviving_young_words_base + PADDING_ELEM_NUM; |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4396 memset(_surviving_young_words, 0, (size_t) real_length * sizeof(size_t)); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4397 |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4398 _alloc_buffers[GCAllocForSurvived] = &_surviving_alloc_buffer; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4399 _alloc_buffers[GCAllocForTenured] = &_tenured_alloc_buffer; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4400 |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4401 _start = os::elapsedTime(); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4402 } |
| 342 | 4403 |
| 1709 | 4404 void |
| 4405 G1ParScanThreadState::print_termination_stats_hdr(outputStream* const st) | |
| 4406 { | |
| 4407 st->print_raw_cr("GC Termination Stats"); | |
| 4408 st->print_raw_cr(" elapsed --strong roots-- -------termination-------" | |
| 4409 " ------waste (KiB)------"); | |
| 4410 st->print_raw_cr("thr ms ms % ms % attempts" | |
| 4411 " total alloc undo"); | |
| 4412 st->print_raw_cr("--- --------- --------- ------ --------- ------ --------" | |
| 4413 " ------- ------- -------"); | |
| 4414 } | |
| 4415 | |
| 4416 void | |
| 4417 G1ParScanThreadState::print_termination_stats(int i, | |
| 4418 outputStream* const st) const | |
| 4419 { | |
| 4420 const double elapsed_ms = elapsed_time() * 1000.0; | |
| 4421 const double s_roots_ms = strong_roots_time() * 1000.0; | |
| 4422 const double term_ms = term_time() * 1000.0; | |
| 4423 st->print_cr("%3d %9.2f %9.2f %6.2f " | |
| 4424 "%9.2f %6.2f " SIZE_FORMAT_W(8) " " | |
| 4425 SIZE_FORMAT_W(7) " " SIZE_FORMAT_W(7) " " SIZE_FORMAT_W(7), | |
| 4426 i, elapsed_ms, s_roots_ms, s_roots_ms * 100 / elapsed_ms, | |
| 4427 term_ms, term_ms * 100 / elapsed_ms, term_attempts(), | |
| 4428 (alloc_buffer_waste() + undo_waste()) * HeapWordSize / K, | |
| 4429 alloc_buffer_waste() * HeapWordSize / K, | |
| 4430 undo_waste() * HeapWordSize / K); | |
| 4431 } | |
| 4432 | |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4433 #ifdef ASSERT |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4434 bool G1ParScanThreadState::verify_ref(narrowOop* ref) const { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4435 assert(ref != NULL, "invariant"); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4436 assert(UseCompressedOops, "sanity"); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4437 assert(!has_partial_array_mask(ref), err_msg("ref=" PTR_FORMAT, ref)); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4438 oop p = oopDesc::load_decode_heap_oop(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4439 assert(_g1h->is_in_g1_reserved(p), |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4440 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, intptr_t(p))); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4441 return true; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4442 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4443 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4444 bool G1ParScanThreadState::verify_ref(oop* ref) const { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4445 assert(ref != NULL, "invariant"); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4446 if (has_partial_array_mask(ref)) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4447 // Must be in the collection set--it's already been copied. |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4448 oop p = clear_partial_array_mask(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4449 assert(_g1h->obj_in_cs(p), |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4450 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, intptr_t(p))); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4451 } else { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4452 oop p = oopDesc::load_decode_heap_oop(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4453 assert(_g1h->is_in_g1_reserved(p), |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4454 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, intptr_t(p))); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4455 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4456 return true; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4457 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4458 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4459 bool G1ParScanThreadState::verify_task(StarTask ref) const { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4460 if (ref.is_narrow()) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4461 return verify_ref((narrowOop*) ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4462 } else { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4463 return verify_ref((oop*) ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4464 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4465 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4466 #endif // ASSERT |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4467 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4468 void G1ParScanThreadState::trim_queue() { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4469 assert(_evac_cl != NULL, "not set"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4470 assert(_evac_failure_cl != NULL, "not set"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4471 assert(_partial_scan_cl != NULL, "not set"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4472 |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4473 StarTask ref; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4474 do { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4475 // Drain the overflow stack first, so other threads can steal. |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4476 while (refs()->pop_overflow(ref)) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4477 deal_with_reference(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4478 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4479 |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4480 while (refs()->pop_local(ref)) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4481 deal_with_reference(ref); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4482 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4483 } while (!refs()->is_empty()); |
|
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6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4484 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4485 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4486 G1ParClosureSuper::G1ParClosureSuper(G1CollectedHeap* g1, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
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diff
changeset
|
4487 G1ParScanThreadState* par_scan_state) : |
| 342 | 4488 _g1(g1), _g1_rem(_g1->g1_rem_set()), _cm(_g1->concurrent_mark()), |
|
3886
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7080389: G1: refactor marking code in evacuation pause copy closures
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diff
changeset
|
4489 _par_scan_state(par_scan_state), |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
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diff
changeset
|
4490 _worker_id(par_scan_state->queue_num()), |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
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diff
changeset
|
4491 _during_initial_mark(_g1->g1_policy()->during_initial_mark_pause()), |
|
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
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parents:
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diff
changeset
|
4492 _mark_in_progress(_g1->mark_in_progress()) { } |
|
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
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parents:
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diff
changeset
|
4493 |
| 5987 | 4494 template <bool do_gen_barrier, G1Barrier barrier, bool do_mark_object> |
| 4495 void G1ParCopyClosure<do_gen_barrier, barrier, do_mark_object>::mark_object(oop obj) { | |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4496 #ifdef ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4497 HeapRegion* hr = _g1->heap_region_containing(obj); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
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diff
changeset
|
4498 assert(hr != NULL, "sanity"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
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diff
changeset
|
4499 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
|
4500 #endif // ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4501 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
4785
diff
changeset
|
4502 // 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
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parents:
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diff
changeset
|
4503 _cm->grayRoot(obj, (size_t) obj->size(), _worker_id); |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
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diff
changeset
|
4504 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
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diff
changeset
|
4505 |
| 5987 | 4506 template <bool do_gen_barrier, G1Barrier barrier, bool do_mark_object> |
| 4507 void G1ParCopyClosure<do_gen_barrier, barrier, do_mark_object> | |
| 4508 ::mark_forwarded_object(oop from_obj, oop to_obj) { | |
|
4787
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6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4509 #ifdef ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4510 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
|
4511 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:
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diff
changeset
|
4512 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
|
4513 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
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diff
changeset
|
4514 HeapRegion* from_hr = _g1->heap_region_containing(from_obj); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
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diff
changeset
|
4515 assert(from_hr != NULL, "sanity"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4516 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
|
4517 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4518 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
|
4519 assert(to_hr != NULL, "sanity"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4520 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
|
4521 #endif // ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4522 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4523 // 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
|
4524 // 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
|
4525 // 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
|
4526 // image which we know should not be changing. |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4527 _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
|
4528 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4529 |
| 5987 | 4530 template <bool do_gen_barrier, G1Barrier barrier, bool do_mark_object> |
| 4531 oop G1ParCopyClosure<do_gen_barrier, barrier, do_mark_object> | |
| 4532 ::copy_to_survivor_space(oop old) { | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4533 size_t word_sz = old->size(); |
| 342 | 4534 HeapRegion* from_region = _g1->heap_region_containing_raw(old); |
| 4535 // +1 to make the -1 indexes valid... | |
| 4536 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
|
4537 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
|
4538 (!from_region->is_young() && young_index == 0), "invariant" ); |
| 342 | 4539 G1CollectorPolicy* g1p = _g1->g1_policy(); |
| 4540 markOop m = old->mark(); | |
| 545 | 4541 int age = m->has_displaced_mark_helper() ? m->displaced_mark_helper()->age() |
| 4542 : m->age(); | |
| 4543 GCAllocPurpose alloc_purpose = g1p->evacuation_destination(from_region, age, | |
| 342 | 4544 word_sz); |
| 4545 HeapWord* obj_ptr = _par_scan_state->allocate(alloc_purpose, word_sz); | |
| 4546 oop obj = oop(obj_ptr); | |
| 4547 | |
| 4548 if (obj_ptr == NULL) { | |
| 4549 // This will either forward-to-self, or detect that someone else has | |
| 4550 // installed a forwarding pointer. | |
| 4551 OopsInHeapRegionClosure* cl = _par_scan_state->evac_failure_closure(); | |
|
4787
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6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4552 return _g1->handle_evacuation_failure_par(cl, old); |
| 342 | 4553 } |
| 4554 | |
| 526 | 4555 // We're going to allocate linearly, so might as well prefetch ahead. |
| 4556 Prefetch::write(obj_ptr, PrefetchCopyIntervalInBytes); | |
| 4557 | |
| 342 | 4558 oop forward_ptr = old->forward_to_atomic(obj); |
| 4559 if (forward_ptr == NULL) { | |
| 4560 Copy::aligned_disjoint_words((HeapWord*) old, obj_ptr, word_sz); | |
| 526 | 4561 if (g1p->track_object_age(alloc_purpose)) { |
| 4562 // We could simply do obj->incr_age(). However, this causes a | |
| 4563 // performance issue. obj->incr_age() will first check whether | |
| 4564 // the object has a displaced mark by checking its mark word; | |
| 4565 // getting the mark word from the new location of the object | |
| 4566 // stalls. So, given that we already have the mark word and we | |
| 4567 // are about to install it anyway, it's better to increase the | |
| 4568 // age on the mark word, when the object does not have a | |
| 4569 // displaced mark word. We're not expecting many objects to have | |
| 4570 // a displaced marked word, so that case is not optimized | |
| 4571 // further (it could be...) and we simply call obj->incr_age(). | |
| 4572 | |
| 4573 if (m->has_displaced_mark_helper()) { | |
| 4574 // in this case, we have to install the mark word first, | |
| 4575 // otherwise obj looks to be forwarded (the old mark word, | |
| 4576 // which contains the forward pointer, was copied) | |
| 4577 obj->set_mark(m); | |
| 4578 obj->incr_age(); | |
| 4579 } else { | |
| 4580 m = m->incr_age(); | |
| 545 | 4581 obj->set_mark(m); |
| 526 | 4582 } |
| 545 | 4583 _par_scan_state->age_table()->add(obj, word_sz); |
| 4584 } else { | |
| 4585 obj->set_mark(m); | |
| 526 | 4586 } |
| 4587 | |
| 342 | 4588 size_t* surv_young_words = _par_scan_state->surviving_young_words(); |
| 4589 surv_young_words[young_index] += word_sz; | |
| 4590 | |
| 4591 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
|
4592 // 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
|
4593 // 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
|
4594 // 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
|
4595 arrayOop(obj)->set_length(0); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4596 oop* old_p = set_partial_array_mask(old); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4597 _par_scan_state->push_on_queue(old_p); |
| 342 | 4598 } else { |
| 526 | 4599 // No point in using the slower heap_region_containing() method, |
| 4600 // given that we know obj is in the heap. | |
| 5987 | 4601 _scanner.set_region(_g1->heap_region_containing_raw(obj)); |
| 4602 obj->oop_iterate_backwards(&_scanner); | |
| 342 | 4603 } |
| 4604 } else { | |
| 4605 _par_scan_state->undo_allocation(alloc_purpose, obj_ptr, word_sz); | |
| 4606 obj = forward_ptr; | |
| 4607 } | |
| 4608 return obj; | |
| 4609 } | |
| 4610 | |
|
3886
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7080389: G1: refactor marking code in evacuation pause copy closures
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parents:
3869
diff
changeset
|
4611 template <bool do_gen_barrier, G1Barrier barrier, bool do_mark_object> |
|
845
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6700789: G1: Enable use of compressed oops with G1 heaps
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diff
changeset
|
4612 template <class T> |
|
3886
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7080389: G1: refactor marking code in evacuation pause copy closures
johnc
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diff
changeset
|
4613 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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diff
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|
4614 ::do_oop_work(T* p) { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
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838
diff
changeset
|
4615 oop obj = oopDesc::load_decode_heap_oop(p); |
| 342 | 4616 assert(barrier != G1BarrierRS || obj != NULL, |
|
4787
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6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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4785
diff
changeset
|
4617 "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
|
4618 |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
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parents:
4834
diff
changeset
|
4619 assert(_worker_id == _par_scan_state->queue_num(), "sanity"); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
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4834
diff
changeset
|
4620 |
| 526 | 4621 // here the null check is implicit in the cset_fast_test() test |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
4622 if (_g1->in_cset_fast_test(obj)) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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4785
diff
changeset
|
4623 oop forwardee; |
| 526 | 4624 if (obj->is_forwarded()) { |
|
4787
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6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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4785
diff
changeset
|
4625 forwardee = obj->forwardee(); |
| 526 | 4626 } else { |
|
4787
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6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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4785
diff
changeset
|
4627 forwardee = copy_to_survivor_space(obj); |
| 342 | 4628 } |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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4785
diff
changeset
|
4629 assert(forwardee != NULL, "forwardee should not be NULL"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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4785
diff
changeset
|
4630 oopDesc::encode_store_heap_oop(p, forwardee); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
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4785
diff
changeset
|
4631 if (do_mark_object && forwardee != obj) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4632 // If the object is self-forwarded we don't need to explicitly |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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4785
diff
changeset
|
4633 // mark it, the evacuation failure protocol will do so. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
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4785
diff
changeset
|
4634 mark_forwarded_object(obj, forwardee); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4635 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4636 |
| 526 | 4637 // When scanning the RS, we only care about objs in CS. |
| 4638 if (barrier == G1BarrierRS) { | |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4639 _par_scan_state->update_rs(_from, p, _worker_id); |
| 342 | 4640 } |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4641 } else { |
|
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4642 // 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
|
4643 // closure during an initial mark pause (i.e. do_mark_object will |
|
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4644 // be true) then attempt to mark the object. |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4645 if (do_mark_object && _g1->is_in_g1_reserved(obj)) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4646 mark_object(obj); |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4647 } |
| 526 | 4648 } |
| 4649 | |
| 4650 if (barrier == G1BarrierEvac && obj != NULL) { | |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4651 _par_scan_state->update_rs(_from, p, _worker_id); |
| 526 | 4652 } |
| 4653 | |
| 4654 if (do_gen_barrier && obj != NULL) { | |
| 4655 par_do_barrier(p); | |
| 4656 } | |
| 4657 } | |
| 4658 | |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
4659 template void G1ParCopyClosure<false, G1BarrierEvac, false>::do_oop_work(oop* p); |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
4660 template void G1ParCopyClosure<false, G1BarrierEvac, false>::do_oop_work(narrowOop* p); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4661 |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4662 template <class T> void G1ParScanPartialArrayClosure::do_oop_nv(T* p) { |
| 526 | 4663 assert(has_partial_array_mask(p), "invariant"); |
|
4784
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4664 oop from_obj = clear_partial_array_mask(p); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4665 |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4666 assert(Universe::heap()->is_in_reserved(from_obj), "must be in heap."); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4667 assert(from_obj->is_objArray(), "must be obj array"); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4668 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
|
4669 // 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
|
4670 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
|
4671 |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4672 assert(from_obj->is_forwarded(), "must be forwarded"); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4673 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
|
4674 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
|
4675 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
|
4676 // 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
|
4677 // to-space object. |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4678 int next_index = to_obj_array->length(); |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4679 assert(0 <= next_index && next_index < length, |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4680 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
|
4681 |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4682 int start = next_index; |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4683 int end = length; |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4684 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
|
4685 // We'll try not to push a range that's smaller than ParGCArrayScanChunk. |
| 342 | 4686 if (remainder > 2 * ParGCArrayScanChunk) { |
| 4687 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
|
4688 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
|
4689 // 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
|
4690 // 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
|
4691 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
|
4692 _par_scan_state->push_on_queue(from_obj_p); |
| 342 | 4693 } else { |
|
4784
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4694 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
|
4695 // 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
|
4696 // 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
|
4697 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
|
4698 } |
|
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4699 _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
|
4700 // 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
|
4701 // 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
|
4702 // 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
|
4703 // 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
|
4704 // 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
|
4705 // 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
|
4706 // 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
|
4707 // 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
|
4708 to_obj_array->oop_iterate_range(&_scanner, start, end); |
| 342 | 4709 } |
| 4710 | |
| 4711 class G1ParEvacuateFollowersClosure : public VoidClosure { | |
| 4712 protected: | |
| 4713 G1CollectedHeap* _g1h; | |
| 4714 G1ParScanThreadState* _par_scan_state; | |
| 4715 RefToScanQueueSet* _queues; | |
| 4716 ParallelTaskTerminator* _terminator; | |
| 4717 | |
| 4718 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } | |
| 4719 RefToScanQueueSet* queues() { return _queues; } | |
| 4720 ParallelTaskTerminator* terminator() { return _terminator; } | |
| 4721 | |
| 4722 public: | |
| 4723 G1ParEvacuateFollowersClosure(G1CollectedHeap* g1h, | |
| 4724 G1ParScanThreadState* par_scan_state, | |
| 4725 RefToScanQueueSet* queues, | |
| 4726 ParallelTaskTerminator* terminator) | |
| 4727 : _g1h(g1h), _par_scan_state(par_scan_state), | |
| 4728 _queues(queues), _terminator(terminator) {} | |
| 4729 | |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4730 void do_void(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4731 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4732 private: |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4733 inline bool offer_termination(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4734 }; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4735 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4736 bool G1ParEvacuateFollowersClosure::offer_termination() { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4737 G1ParScanThreadState* const pss = par_scan_state(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4738 pss->start_term_time(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4739 const bool res = terminator()->offer_termination(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4740 pss->end_term_time(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4741 return res; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4742 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4743 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4744 void G1ParEvacuateFollowersClosure::do_void() { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4745 StarTask stolen_task; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4746 G1ParScanThreadState* const pss = par_scan_state(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4747 pss->trim_queue(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4748 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4749 do { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4750 while (queues()->steal(pss->queue_num(), pss->hash_seed(), stolen_task)) { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4751 assert(pss->verify_task(stolen_task), "sanity"); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4752 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
|
4753 pss->deal_with_reference((narrowOop*) stolen_task); |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4754 } else { |
|
1883
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
1862
diff
changeset
|
4755 pss->deal_with_reference((oop*) stolen_task); |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4756 } |
|
1883
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
1862
diff
changeset
|
4757 |
|
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
1862
diff
changeset
|
4758 // 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
|
4759 // available new entries on the queues. So we have to make sure |
|
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
1862
diff
changeset
|
4760 // we drain the queues as necessary. |
| 342 | 4761 pss->trim_queue(); |
| 4762 } | |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4763 } while (!offer_termination()); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4764 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4765 pss->retire_alloc_buffers(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4766 } |
| 342 | 4767 |
| 4768 class G1ParTask : public AbstractGangTask { | |
| 4769 protected: | |
| 4770 G1CollectedHeap* _g1h; | |
| 4771 RefToScanQueueSet *_queues; | |
| 4772 ParallelTaskTerminator _terminator; | |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
4773 uint _n_workers; |
| 342 | 4774 |
| 4775 Mutex _stats_lock; | |
| 4776 Mutex* stats_lock() { return &_stats_lock; } | |
| 4777 | |
| 4778 size_t getNCards() { | |
| 4779 return (_g1h->capacity() + G1BlockOffsetSharedArray::N_bytes - 1) | |
| 4780 / G1BlockOffsetSharedArray::N_bytes; | |
| 4781 } | |
| 4782 | |
| 4783 public: | |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4784 G1ParTask(G1CollectedHeap* g1h, |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4785 RefToScanQueueSet *task_queues) |
| 342 | 4786 : AbstractGangTask("G1 collection"), |
| 4787 _g1h(g1h), | |
| 4788 _queues(task_queues), | |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4789 _terminator(0, _queues), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4790 _stats_lock(Mutex::leaf, "parallel G1 stats lock", true) |
| 342 | 4791 {} |
| 4792 | |
| 4793 RefToScanQueueSet* queues() { return _queues; } | |
| 4794 | |
| 4795 RefToScanQueue *work_queue(int i) { | |
| 4796 return queues()->queue(i); | |
| 4797 } | |
| 4798 | |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4799 ParallelTaskTerminator* terminator() { return &_terminator; } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4800 |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4801 virtual void set_for_termination(int active_workers) { |
|
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4802 // This task calls set_n_termination() in par_non_clean_card_iterate_work() |
|
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4803 // in the young space (_par_seq_tasks) in the G1 heap |
|
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4804 // for SequentialSubTasksDone. |
|
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4805 // This task also uses SubTasksDone in SharedHeap and G1CollectedHeap |
|
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4806 // both of which need setting by set_n_termination(). |
|
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4807 _g1h->SharedHeap::set_n_termination(active_workers); |
|
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|
4808 _g1h->set_n_termination(active_workers); |
|
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|
4809 terminator()->reset_for_reuse(active_workers); |
|
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|
4810 _n_workers = active_workers; |
|
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|
4811 } |
|
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|
4812 |
|
4728
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|
4813 void work(uint worker_id) { |
|
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|
4814 if (worker_id >= _n_workers) return; // no work needed this round |
| 1611 | 4815 |
| 4816 double start_time_ms = os::elapsedTime() * 1000.0; | |
|
6219
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|
4817 _g1h->g1_policy()->phase_times()->record_gc_worker_start_time(worker_id, start_time_ms); |
| 1611 | 4818 |
|
5986
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|
4819 { |
|
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|
4820 ResourceMark rm; |
|
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|
4821 HandleMark hm; |
|
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|
4822 |
|
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|
4823 ReferenceProcessor* rp = _g1h->ref_processor_stw(); |
|
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|
4824 |
|
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|
4825 G1ParScanThreadState pss(_g1h, worker_id); |
|
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|
4826 G1ParScanHeapEvacClosure scan_evac_cl(_g1h, &pss, rp); |
|
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|
4827 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, rp); |
|
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|
4828 G1ParScanPartialArrayClosure partial_scan_cl(_g1h, &pss, rp); |
|
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|
4829 |
|
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|
4830 pss.set_evac_closure(&scan_evac_cl); |
|
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|
4831 pss.set_evac_failure_closure(&evac_failure_cl); |
|
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|
4832 pss.set_partial_scan_closure(&partial_scan_cl); |
|
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|
4833 |
|
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|
4834 G1ParScanExtRootClosure only_scan_root_cl(_g1h, &pss, rp); |
|
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|
4835 G1ParScanPermClosure only_scan_perm_cl(_g1h, &pss, rp); |
|
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|
4836 |
|
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changeset
|
4837 G1ParScanAndMarkExtRootClosure scan_mark_root_cl(_g1h, &pss, rp); |
|
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|
4838 G1ParScanAndMarkPermClosure scan_mark_perm_cl(_g1h, &pss, rp); |
|
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|
4839 |
|
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changeset
|
4840 OopClosure* scan_root_cl = &only_scan_root_cl; |
|
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changeset
|
4841 OopsInHeapRegionClosure* scan_perm_cl = &only_scan_perm_cl; |
|
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|
4842 |
|
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changeset
|
4843 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
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changeset
|
4844 // We also need to mark copied objects. |
|
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changeset
|
4845 scan_root_cl = &scan_mark_root_cl; |
|
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|
4846 scan_perm_cl = &scan_mark_perm_cl; |
|
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|
4847 } |
|
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diff
changeset
|
4848 |
|
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diff
changeset
|
4849 G1ParPushHeapRSClosure push_heap_rs_cl(_g1h, &pss); |
|
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diff
changeset
|
4850 |
|
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changeset
|
4851 pss.start_strong_roots(); |
|
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diff
changeset
|
4852 _g1h->g1_process_strong_roots(/* not collecting perm */ false, |
|
500023bd0818
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changeset
|
4853 SharedHeap::SO_AllClasses, |
|
500023bd0818
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diff
changeset
|
4854 scan_root_cl, |
|
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diff
changeset
|
4855 &push_heap_rs_cl, |
|
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diff
changeset
|
4856 scan_perm_cl, |
|
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diff
changeset
|
4857 worker_id); |
|
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diff
changeset
|
4858 pss.end_strong_roots(); |
|
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diff
changeset
|
4859 |
|
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diff
changeset
|
4860 { |
|
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diff
changeset
|
4861 double start = os::elapsedTime(); |
|
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diff
changeset
|
4862 G1ParEvacuateFollowersClosure evac(_g1h, &pss, _queues, &_terminator); |
|
500023bd0818
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diff
changeset
|
4863 evac.do_void(); |
|
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diff
changeset
|
4864 double elapsed_ms = (os::elapsedTime()-start)*1000.0; |
|
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5963
diff
changeset
|
4865 double term_ms = pss.term_time()*1000.0; |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
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6188
diff
changeset
|
4866 _g1h->g1_policy()->phase_times()->record_obj_copy_time(worker_id, elapsed_ms-term_ms); |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4867 _g1h->g1_policy()->phase_times()->record_termination(worker_id, term_ms, pss.term_attempts()); |
|
5986
500023bd0818
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parents:
5963
diff
changeset
|
4868 } |
|
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parents:
5963
diff
changeset
|
4869 _g1h->g1_policy()->record_thread_age_table(pss.age_table()); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
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diff
changeset
|
4870 _g1h->update_surviving_young_words(pss.surviving_young_words()+1); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4871 |
|
500023bd0818
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parents:
5963
diff
changeset
|
4872 if (ParallelGCVerbose) { |
|
500023bd0818
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parents:
5963
diff
changeset
|
4873 MutexLocker x(stats_lock()); |
|
500023bd0818
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diff
changeset
|
4874 pss.print_termination_stats(worker_id); |
|
500023bd0818
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parents:
5963
diff
changeset
|
4875 } |
|
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parents:
5963
diff
changeset
|
4876 |
|
500023bd0818
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5963
diff
changeset
|
4877 assert(pss.refs()->is_empty(), "should be empty"); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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5963
diff
changeset
|
4878 |
|
500023bd0818
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5963
diff
changeset
|
4879 // Close the inner scope so that the ResourceMark and HandleMark |
|
500023bd0818
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5963
diff
changeset
|
4880 // destructors are executed here and are included as part of the |
|
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diff
changeset
|
4881 // "GC Worker Time". |
| 342 | 4882 } |
| 4883 | |
| 1611 | 4884 double end_time_ms = os::elapsedTime() * 1000.0; |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4885 _g1h->g1_policy()->phase_times()->record_gc_worker_end_time(worker_id, end_time_ms); |
| 342 | 4886 } |
| 4887 }; | |
| 4888 | |
| 4889 // *** Common G1 Evacuation Stuff | |
| 4890 | |
|
5986
500023bd0818
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5963
diff
changeset
|
4891 // Closures that support the filtering of CodeBlobs scanned during |
|
500023bd0818
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5963
diff
changeset
|
4892 // external root scanning. |
|
500023bd0818
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5963
diff
changeset
|
4893 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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5963
diff
changeset
|
4894 // Closure applied to reference fields in code blobs (specifically nmethods) |
|
500023bd0818
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5963
diff
changeset
|
4895 // to determine whether an nmethod contains references that point into |
|
500023bd0818
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5963
diff
changeset
|
4896 // the collection set. Used as a predicate when walking code roots so |
|
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5963
diff
changeset
|
4897 // that only nmethods that point into the collection set are added to the |
|
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diff
changeset
|
4898 // 'marked' list. |
|
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5963
diff
changeset
|
4899 |
|
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5963
diff
changeset
|
4900 class G1FilteredCodeBlobToOopClosure : public CodeBlobToOopClosure { |
|
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diff
changeset
|
4901 |
|
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diff
changeset
|
4902 class G1PointsIntoCSOopClosure : public OopClosure { |
|
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diff
changeset
|
4903 G1CollectedHeap* _g1; |
|
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diff
changeset
|
4904 bool _points_into_cs; |
|
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diff
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|
4905 public: |
|
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5963
diff
changeset
|
4906 G1PointsIntoCSOopClosure(G1CollectedHeap* g1) : |
|
500023bd0818
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5963
diff
changeset
|
4907 _g1(g1), _points_into_cs(false) { } |
|
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5963
diff
changeset
|
4908 |
|
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diff
changeset
|
4909 bool points_into_cs() const { return _points_into_cs; } |
|
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5963
diff
changeset
|
4910 |
|
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diff
changeset
|
4911 template <class T> |
|
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diff
changeset
|
4912 void do_oop_nv(T* p) { |
|
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diff
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|
4913 if (!_points_into_cs) { |
|
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diff
changeset
|
4914 T heap_oop = oopDesc::load_heap_oop(p); |
|
500023bd0818
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5963
diff
changeset
|
4915 if (!oopDesc::is_null(heap_oop) && |
|
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5963
diff
changeset
|
4916 _g1->in_cset_fast_test(oopDesc::decode_heap_oop_not_null(heap_oop))) { |
|
500023bd0818
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diff
changeset
|
4917 _points_into_cs = true; |
|
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changeset
|
4918 } |
|
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diff
changeset
|
4919 } |
|
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changeset
|
4920 } |
|
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changeset
|
4921 |
|
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changeset
|
4922 virtual void do_oop(oop* p) { do_oop_nv(p); } |
|
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changeset
|
4923 virtual void do_oop(narrowOop* p) { do_oop_nv(p); } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4924 }; |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4925 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4926 G1CollectedHeap* _g1; |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4927 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4928 public: |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4929 G1FilteredCodeBlobToOopClosure(G1CollectedHeap* g1, OopClosure* cl) : |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4930 CodeBlobToOopClosure(cl, true), _g1(g1) { } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4931 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4932 virtual void do_code_blob(CodeBlob* cb) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4933 nmethod* nm = cb->as_nmethod_or_null(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4934 if (nm != NULL && !(nm->test_oops_do_mark())) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4935 G1PointsIntoCSOopClosure predicate_cl(_g1); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4936 nm->oops_do(&predicate_cl); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4937 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4938 if (predicate_cl.points_into_cs()) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4939 // At least one of the reference fields or the oop relocations |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4940 // in the nmethod points into the collection set. We have to |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4941 // 'mark' this nmethod. |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4942 // Note: Revisit the following if CodeBlobToOopClosure::do_code_blob() |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4943 // or MarkingCodeBlobClosure::do_code_blob() change. |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4944 if (!nm->test_set_oops_do_mark()) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4945 do_newly_marked_nmethod(nm); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4946 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4947 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4948 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4949 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4950 }; |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4951 |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
4952 // This method is run in a GC worker. |
|
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
4953 |
| 342 | 4954 void |
| 4955 G1CollectedHeap:: | |
| 4956 g1_process_strong_roots(bool collecting_perm_gen, | |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
4957 ScanningOption so, |
| 342 | 4958 OopClosure* scan_non_heap_roots, |
| 4959 OopsInHeapRegionClosure* scan_rs, | |
| 4960 OopsInGenClosure* scan_perm, | |
| 4961 int worker_i) { | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4962 |
| 342 | 4963 // First scan the strong roots, including the perm gen. |
| 4964 double ext_roots_start = os::elapsedTime(); | |
| 4965 double closure_app_time_sec = 0.0; | |
| 4966 | |
| 4967 BufferingOopClosure buf_scan_non_heap_roots(scan_non_heap_roots); | |
| 4968 BufferingOopsInGenClosure buf_scan_perm(scan_perm); | |
| 4969 buf_scan_perm.set_generation(perm_gen()); | |
| 4970 | |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
4971 // 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
|
4972 // unaligned oop locations. |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4973 G1FilteredCodeBlobToOopClosure eager_scan_code_roots(this, scan_non_heap_roots); |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
4974 |
|
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
4975 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
|
4976 collecting_perm_gen, so, |
| 342 | 4977 &buf_scan_non_heap_roots, |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
4978 &eager_scan_code_roots, |
| 342 | 4979 &buf_scan_perm); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4980 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4981 // Now the CM ref_processor roots. |
|
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
4982 if (!_process_strong_tasks->is_task_claimed(G1H_PS_refProcessor_oops_do)) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4983 // We need to treat the discovered reference lists of the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4984 // concurrent mark ref processor as roots and keep entries |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4985 // (which are added by the marking threads) on them live |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4986 // until they can be processed at the end of marking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4987 ref_processor_cm()->weak_oops_do(&buf_scan_non_heap_roots); |
|
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
4988 } |
|
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
4989 |
|
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
4990 // Finish up any enqueued closure apps (attributed as object copy time). |
| 342 | 4991 buf_scan_non_heap_roots.done(); |
| 4992 buf_scan_perm.done(); | |
|
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
4993 |
| 342 | 4994 double ext_roots_end = os::elapsedTime(); |
|
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
4995 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4996 g1_policy()->phase_times()->reset_obj_copy_time(worker_i); |
|
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
4997 double obj_copy_time_sec = buf_scan_perm.closure_app_seconds() + |
|
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
4998 buf_scan_non_heap_roots.closure_app_seconds(); |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4999 g1_policy()->phase_times()->record_obj_copy_time(worker_i, obj_copy_time_sec * 1000.0); |
|
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
5000 |
| 342 | 5001 double ext_root_time_ms = |
| 5002 ((ext_roots_end - ext_roots_start) - obj_copy_time_sec) * 1000.0; | |
|
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
5003 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5004 g1_policy()->phase_times()->record_ext_root_scan_time(worker_i, ext_root_time_ms); |
| 342 | 5005 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5006 // 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
|
5007 // 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
|
5008 // as implicitly live). |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5009 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
|
5010 if (mark_in_progress()) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5011 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
|
5012 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5013 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5014 double satb_filtering_ms = (os::elapsedTime() - ext_roots_end) * 1000.0; |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5015 g1_policy()->phase_times()->record_satb_filtering_time(worker_i, satb_filtering_ms); |
| 342 | 5016 |
| 5017 // Now scan the complement of the collection set. | |
| 5018 if (scan_rs != NULL) { | |
| 5019 g1_rem_set()->oops_into_collection_set_do(scan_rs, worker_i); | |
| 5020 } | |
|
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
5021 |
| 342 | 5022 _process_strong_tasks->all_tasks_completed(); |
| 5023 } | |
| 5024 | |
| 5025 void | |
| 5026 G1CollectedHeap::g1_process_weak_roots(OopClosure* root_closure, | |
| 5027 OopClosure* non_root_closure) { | |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5028 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
|
5029 SharedHeap::process_weak_roots(root_closure, &roots_in_blobs, non_root_closure); |
| 342 | 5030 } |
| 5031 | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5032 // Weak Reference Processing support |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5033 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5034 // An always "is_alive" closure that is used to preserve referents. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5035 // If the object is non-null then it's alive. Used in the preservation |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5036 // of referent objects that are pointed to by reference objects |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5037 // discovered by the CM ref processor. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5038 class G1AlwaysAliveClosure: public BoolObjectClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5039 G1CollectedHeap* _g1; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5040 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5041 G1AlwaysAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5042 void do_object(oop p) { assert(false, "Do not call."); } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5043 bool do_object_b(oop p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5044 if (p != NULL) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5045 return true; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5046 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5047 return false; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5048 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5049 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5050 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5051 bool G1STWIsAliveClosure::do_object_b(oop p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5052 // An object is reachable if it is outside the collection set, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5053 // or is inside and copied. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5054 return !_g1->obj_in_cs(p) || p->is_forwarded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5055 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5056 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5057 // Non Copying Keep Alive closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5058 class G1KeepAliveClosure: public OopClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5059 G1CollectedHeap* _g1; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5060 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5061 G1KeepAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5062 void do_oop(narrowOop* p) { guarantee(false, "Not needed"); } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5063 void do_oop( oop* p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5064 oop obj = *p; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5065 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5066 if (_g1->obj_in_cs(obj)) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5067 assert( obj->is_forwarded(), "invariant" ); |
|
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diff
changeset
|
5068 *p = obj->forwardee(); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5069 } |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5070 } |
|
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diff
changeset
|
5071 }; |
|
4dfb2df418f2
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diff
changeset
|
5072 |
|
4dfb2df418f2
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diff
changeset
|
5073 // Copying Keep Alive closure - can be called from both |
|
4dfb2df418f2
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diff
changeset
|
5074 // serial and parallel code as long as different worker |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5075 // threads utilize different G1ParScanThreadState instances |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5076 // and different queues. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5077 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5078 class G1CopyingKeepAliveClosure: public OopClosure { |
|
4dfb2df418f2
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changeset
|
5079 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
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diff
changeset
|
5080 OopClosure* _copy_non_heap_obj_cl; |
|
4dfb2df418f2
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changeset
|
5081 OopsInHeapRegionClosure* _copy_perm_obj_cl; |
|
4dfb2df418f2
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|
5082 G1ParScanThreadState* _par_scan_state; |
|
4dfb2df418f2
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changeset
|
5083 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5084 public: |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5085 G1CopyingKeepAliveClosure(G1CollectedHeap* g1h, |
|
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changeset
|
5086 OopClosure* non_heap_obj_cl, |
|
4dfb2df418f2
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changeset
|
5087 OopsInHeapRegionClosure* perm_obj_cl, |
|
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changeset
|
5088 G1ParScanThreadState* pss): |
|
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diff
changeset
|
5089 _g1h(g1h), |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5090 _copy_non_heap_obj_cl(non_heap_obj_cl), |
|
4dfb2df418f2
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parents:
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changeset
|
5091 _copy_perm_obj_cl(perm_obj_cl), |
|
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changeset
|
5092 _par_scan_state(pss) |
|
4dfb2df418f2
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|
5093 {} |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5094 |
|
4dfb2df418f2
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changeset
|
5095 virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
|
4dfb2df418f2
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changeset
|
5096 virtual void do_oop( oop* p) { do_oop_work(p); } |
|
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changeset
|
5097 |
|
4dfb2df418f2
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diff
changeset
|
5098 template <class T> void do_oop_work(T* p) { |
|
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changeset
|
5099 oop obj = oopDesc::load_decode_heap_oop(p); |
|
4dfb2df418f2
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changeset
|
5100 |
|
4dfb2df418f2
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diff
changeset
|
5101 if (_g1h->obj_in_cs(obj)) { |
|
4dfb2df418f2
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changeset
|
5102 // If the referent object has been forwarded (either copied |
|
4dfb2df418f2
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diff
changeset
|
5103 // to a new location or to itself in the event of an |
|
4dfb2df418f2
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diff
changeset
|
5104 // evacuation failure) then we need to update the reference |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5105 // field and, if both reference and referent are in the G1 |
|
4dfb2df418f2
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diff
changeset
|
5106 // heap, update the RSet for the referent. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5107 // |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5108 // If the referent has not been forwarded then we have to keep |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5109 // it alive by policy. Therefore we have copy the referent. |
|
4dfb2df418f2
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parents:
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changeset
|
5110 // |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5111 // If the reference field is in the G1 heap then we can push |
|
4dfb2df418f2
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diff
changeset
|
5112 // on the PSS queue. When the queue is drained (after each |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5113 // phase of reference processing) the object and it's followers |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5114 // will be copied, the reference field set to point to the |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5115 // new location, and the RSet updated. Otherwise we need to |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5116 // use the the non-heap or perm closures directly to copy |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5117 // the refernt object and update the pointer, while avoiding |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5118 // updating the RSet. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5119 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5120 if (_g1h->is_in_g1_reserved(p)) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5121 _par_scan_state->push_on_queue(p); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5122 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5123 // The reference field is not in the G1 heap. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5124 if (_g1h->perm_gen()->is_in(p)) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5125 _copy_perm_obj_cl->do_oop(p); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5126 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5127 _copy_non_heap_obj_cl->do_oop(p); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5128 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5129 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5130 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5131 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5132 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5133 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5134 // Serial drain queue closure. Called as the 'complete_gc' |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5135 // closure for each discovered list in some of the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5136 // reference processing phases. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5137 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5138 class G1STWDrainQueueClosure: public VoidClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5139 protected: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5140 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5141 G1ParScanThreadState* _par_scan_state; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5142 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5143 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5144 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5145 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5146 G1STWDrainQueueClosure(G1CollectedHeap* g1h, G1ParScanThreadState* pss) : |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5147 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5148 _par_scan_state(pss) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5149 { } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5150 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5151 void do_void() { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5152 G1ParScanThreadState* const pss = par_scan_state(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5153 pss->trim_queue(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5154 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5155 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5156 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5157 // Parallel Reference Processing closures |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5158 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5159 // Implementation of AbstractRefProcTaskExecutor for parallel reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5160 // processing during G1 evacuation pauses. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5161 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5162 class G1STWRefProcTaskExecutor: public AbstractRefProcTaskExecutor { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5163 private: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5164 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5165 RefToScanQueueSet* _queues; |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5166 FlexibleWorkGang* _workers; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5167 int _active_workers; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5168 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5169 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5170 G1STWRefProcTaskExecutor(G1CollectedHeap* g1h, |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5171 FlexibleWorkGang* workers, |
|
3979
4dfb2df418f2
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parents:
3973
diff
changeset
|
5172 RefToScanQueueSet *task_queues, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5173 int n_workers) : |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5174 _g1h(g1h), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5175 _queues(task_queues), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5176 _workers(workers), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5177 _active_workers(n_workers) |
|
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
5178 { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5179 assert(n_workers > 0, "shouldn't call this otherwise"); |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5180 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5181 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5182 // Executes the given task using concurrent marking worker threads. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5183 virtual void execute(ProcessTask& task); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5184 virtual void execute(EnqueueTask& task); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5185 }; |
|
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
5186 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5187 // Gang task for possibly parallel reference processing |
|
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
5188 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5189 class G1STWRefProcTaskProxy: public AbstractGangTask { |
|
4dfb2df418f2
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diff
changeset
|
5190 typedef AbstractRefProcTaskExecutor::ProcessTask ProcessTask; |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5191 ProcessTask& _proc_task; |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5192 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
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diff
changeset
|
5193 RefToScanQueueSet *_task_queues; |
|
4dfb2df418f2
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diff
changeset
|
5194 ParallelTaskTerminator* _terminator; |
|
4dfb2df418f2
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diff
changeset
|
5195 |
|
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|
5196 public: |
|
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|
5197 G1STWRefProcTaskProxy(ProcessTask& proc_task, |
|
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|
5198 G1CollectedHeap* g1h, |
|
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|
5199 RefToScanQueueSet *task_queues, |
|
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|
5200 ParallelTaskTerminator* terminator) : |
|
4dfb2df418f2
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|
5201 AbstractGangTask("Process reference objects in parallel"), |
|
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|
5202 _proc_task(proc_task), |
|
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parents:
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changeset
|
5203 _g1h(g1h), |
|
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parents:
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|
5204 _task_queues(task_queues), |
|
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|
5205 _terminator(terminator) |
|
4dfb2df418f2
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|
5206 {} |
|
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|
5207 |
|
4728
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|
5208 virtual void work(uint worker_id) { |
|
3979
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|
5209 // The reference processing task executed by a single worker. |
|
4dfb2df418f2
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|
5210 ResourceMark rm; |
|
4dfb2df418f2
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|
5211 HandleMark hm; |
|
4dfb2df418f2
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|
5212 |
|
4dfb2df418f2
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|
5213 G1STWIsAliveClosure is_alive(_g1h); |
|
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|
5214 |
|
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|
5215 G1ParScanThreadState pss(_g1h, worker_id); |
|
3979
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|
5216 |
|
4dfb2df418f2
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|
5217 G1ParScanHeapEvacClosure scan_evac_cl(_g1h, &pss, NULL); |
|
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|
5218 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
|
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|
5219 G1ParScanPartialArrayClosure partial_scan_cl(_g1h, &pss, NULL); |
|
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|
5220 |
|
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|
5221 pss.set_evac_closure(&scan_evac_cl); |
|
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|
5222 pss.set_evac_failure_closure(&evac_failure_cl); |
|
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|
5223 pss.set_partial_scan_closure(&partial_scan_cl); |
|
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|
5224 |
|
4dfb2df418f2
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|
5225 G1ParScanExtRootClosure only_copy_non_heap_cl(_g1h, &pss, NULL); |
|
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|
5226 G1ParScanPermClosure only_copy_perm_cl(_g1h, &pss, NULL); |
|
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|
5227 |
|
4dfb2df418f2
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|
5228 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
|
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|
5229 G1ParScanAndMarkPermClosure copy_mark_perm_cl(_g1h, &pss, NULL); |
|
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|
5230 |
|
4dfb2df418f2
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|
5231 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
|
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|
5232 OopsInHeapRegionClosure* copy_perm_cl = &only_copy_perm_cl; |
|
4dfb2df418f2
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changeset
|
5233 |
|
4dfb2df418f2
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parents:
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changeset
|
5234 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
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parents:
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|
5235 // We also need to mark copied objects. |
|
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parents:
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diff
changeset
|
5236 copy_non_heap_cl = ©_mark_non_heap_cl; |
|
4dfb2df418f2
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|
5237 copy_perm_cl = ©_mark_perm_cl; |
|
4dfb2df418f2
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parents:
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|
5238 } |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5239 |
|
4dfb2df418f2
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changeset
|
5240 // Keep alive closure. |
|
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|
5241 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, copy_perm_cl, &pss); |
|
4dfb2df418f2
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|
5242 |
|
4dfb2df418f2
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diff
changeset
|
5243 // Complete GC closure |
|
4dfb2df418f2
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parents:
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|
5244 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _task_queues, _terminator); |
|
4dfb2df418f2
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|
5245 |
|
4dfb2df418f2
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changeset
|
5246 // Call the reference processing task's work routine. |
|
4728
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jmasa
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|
5247 _proc_task.work(worker_id, is_alive, keep_alive, drain_queue); |
|
3979
4dfb2df418f2
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changeset
|
5248 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5249 // Note we cannot assert that the refs array is empty here as not all |
|
4dfb2df418f2
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|
5250 // of the processing tasks (specifically phase2 - pp2_work) execute |
|
4dfb2df418f2
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|
5251 // the complete_gc closure (which ordinarily would drain the queue) so |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5252 // the queue may not be empty. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5253 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5254 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5255 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5256 // Driver routine for parallel reference processing. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5257 // Creates an instance of the ref processing gang |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5258 // task and has the worker threads execute it. |
|
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parents:
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changeset
|
5259 void G1STWRefProcTaskExecutor::execute(ProcessTask& proc_task) { |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5260 assert(_workers != NULL, "Need parallel worker threads."); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5261 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5262 ParallelTaskTerminator terminator(_active_workers, _queues); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5263 G1STWRefProcTaskProxy proc_task_proxy(proc_task, _g1h, _queues, &terminator); |
|
4dfb2df418f2
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parents:
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changeset
|
5264 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5265 _g1h->set_par_threads(_active_workers); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5266 _workers->run_task(&proc_task_proxy); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5267 _g1h->set_par_threads(0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5268 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5269 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5270 // Gang task for parallel reference enqueueing. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5271 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5272 class G1STWRefEnqueueTaskProxy: public AbstractGangTask { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5273 typedef AbstractRefProcTaskExecutor::EnqueueTask EnqueueTask; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5274 EnqueueTask& _enq_task; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5275 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5276 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5277 G1STWRefEnqueueTaskProxy(EnqueueTask& enq_task) : |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5278 AbstractGangTask("Enqueue reference objects in parallel"), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5279 _enq_task(enq_task) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5280 { } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5281 |
|
4728
441e946dc1af
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jmasa
parents:
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diff
changeset
|
5282 virtual void work(uint worker_id) { |
|
441e946dc1af
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jmasa
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diff
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|
5283 _enq_task.work(worker_id); |
|
3979
4dfb2df418f2
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parents:
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diff
changeset
|
5284 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5285 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5286 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5287 // Driver routine for parallel reference enqueing. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5288 // Creates an instance of the ref enqueueing gang |
|
4dfb2df418f2
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diff
changeset
|
5289 // task and has the worker threads execute it. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5290 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5291 void G1STWRefProcTaskExecutor::execute(EnqueueTask& enq_task) { |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5292 assert(_workers != NULL, "Need parallel worker threads."); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5293 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5294 G1STWRefEnqueueTaskProxy enq_task_proxy(enq_task); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5295 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5296 _g1h->set_par_threads(_active_workers); |
|
4dfb2df418f2
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diff
changeset
|
5297 _workers->run_task(&enq_task_proxy); |
|
4dfb2df418f2
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diff
changeset
|
5298 _g1h->set_par_threads(0); |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5299 } |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5300 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5301 // End of weak reference support closures |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5302 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5303 // Abstract task used to preserve (i.e. copy) any referent objects |
|
4dfb2df418f2
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diff
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|
5304 // that are in the collection set and are pointed to by reference |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5305 // objects discovered by the CM ref processor. |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5306 |
|
4dfb2df418f2
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diff
changeset
|
5307 class G1ParPreserveCMReferentsTask: public AbstractGangTask { |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5308 protected: |
|
4dfb2df418f2
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diff
changeset
|
5309 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
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diff
changeset
|
5310 RefToScanQueueSet *_queues; |
|
4dfb2df418f2
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diff
changeset
|
5311 ParallelTaskTerminator _terminator; |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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diff
changeset
|
5312 uint _n_workers; |
|
3979
4dfb2df418f2
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diff
changeset
|
5313 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5314 public: |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5315 G1ParPreserveCMReferentsTask(G1CollectedHeap* g1h,int workers, RefToScanQueueSet *task_queues) : |
|
4dfb2df418f2
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diff
changeset
|
5316 AbstractGangTask("ParPreserveCMReferents"), |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5317 _g1h(g1h), |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5318 _queues(task_queues), |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5319 _terminator(workers, _queues), |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5320 _n_workers(workers) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5321 { } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5322 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5323 void work(uint worker_id) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5324 ResourceMark rm; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5325 HandleMark hm; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5326 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5327 G1ParScanThreadState pss(_g1h, worker_id); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5328 G1ParScanHeapEvacClosure scan_evac_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5329 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5330 G1ParScanPartialArrayClosure partial_scan_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5331 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5332 pss.set_evac_closure(&scan_evac_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5333 pss.set_evac_failure_closure(&evac_failure_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5334 pss.set_partial_scan_closure(&partial_scan_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5335 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5336 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
|
5337 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5338 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5339 G1ParScanExtRootClosure only_copy_non_heap_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5340 G1ParScanPermClosure only_copy_perm_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5341 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5342 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5343 G1ParScanAndMarkPermClosure copy_mark_perm_cl(_g1h, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5344 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5345 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5346 OopsInHeapRegionClosure* copy_perm_cl = &only_copy_perm_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5347 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5348 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5349 // We also need to mark copied objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5350 copy_non_heap_cl = ©_mark_non_heap_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5351 copy_perm_cl = ©_mark_perm_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5352 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5353 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5354 // Is alive closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5355 G1AlwaysAliveClosure always_alive(_g1h); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5356 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5357 // Copying keep alive closure. Applied to referent objects that need |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5358 // to be copied. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5359 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, copy_perm_cl, &pss); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5360 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5361 ReferenceProcessor* rp = _g1h->ref_processor_cm(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5362 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5363 uint limit = ReferenceProcessor::number_of_subclasses_of_ref() * rp->max_num_q(); |
|
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5364 uint stride = MIN2(MAX2(_n_workers, 1U), limit); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5365 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5366 // limit is set using max_num_q() - which was set using ParallelGCThreads. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5367 // So this must be true - but assert just in case someone decides to |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5368 // change the worker ids. |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5369 assert(0 <= worker_id && worker_id < limit, "sanity"); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5370 assert(!rp->discovery_is_atomic(), "check this code"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5371 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5372 // 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
|
5373 for (uint idx = worker_id; idx < limit; idx += stride) { |
|
4014
bf2d2b8b1726
7095243: Disambiguate ReferenceProcessor::_discoveredSoftRefs
johnc
parents:
4013
diff
changeset
|
5374 DiscoveredList& ref_list = rp->discovered_refs()[idx]; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5375 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5376 DiscoveredListIterator iter(ref_list, &keep_alive, &always_alive); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5377 while (iter.has_next()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5378 // Since discovery is not atomic for the CM ref processor, we |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5379 // can see some null referent objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5380 iter.load_ptrs(DEBUG_ONLY(true)); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5381 oop ref = iter.obj(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5382 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5383 // This will filter nulls. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5384 if (iter.is_referent_alive()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5385 iter.make_referent_alive(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5386 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5387 iter.move_to_next(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5388 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5389 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5390 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5391 // Drain the queue - which may cause stealing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5392 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _queues, &_terminator); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5393 drain_queue.do_void(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5394 // Allocation buffers were retired at the end of G1ParEvacuateFollowersClosure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5395 assert(pss.refs()->is_empty(), "should be"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5396 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5397 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5398 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5399 // Weak Reference processing during an evacuation pause (part 1). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5400 void G1CollectedHeap::process_discovered_references() { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5401 double ref_proc_start = os::elapsedTime(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5402 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5403 ReferenceProcessor* rp = _ref_processor_stw; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5404 assert(rp->discovery_enabled(), "should have been enabled"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5405 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5406 // Any reference objects, in the collection set, that were 'discovered' |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5407 // by the CM ref processor should have already been copied (either by |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5408 // applying the external root copy closure to the discovered lists, or |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5409 // by following an RSet entry). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5410 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5411 // But some of the referents, that are in the collection set, that these |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5412 // reference objects point to may not have been copied: the STW ref |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5413 // processor would have seen that the reference object had already |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5414 // been 'discovered' and would have skipped discovering the reference, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5415 // but would not have treated the reference object as a regular oop. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5416 // As a reult the copy closure would not have been applied to the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5417 // referent object. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5418 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5419 // We need to explicitly copy these referent objects - the references |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5420 // will be processed at the end of remarking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5421 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5422 // We also need to do this copying before we process the reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5423 // objects discovered by the STW ref processor in case one of these |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5424 // referents points to another object which is also referenced by an |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5425 // object discovered by the STW ref processor. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5426 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5427 uint active_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5428 workers()->active_workers() : 1); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5429 |
| 4711 | 5430 assert(!G1CollectedHeap::use_parallel_gc_threads() || |
| 5431 active_workers == workers()->active_workers(), | |
| 5432 "Need to reset active_workers"); | |
| 5433 | |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5434 set_par_threads(active_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5435 G1ParPreserveCMReferentsTask keep_cm_referents(this, active_workers, _task_queues); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5436 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5437 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5438 workers()->run_task(&keep_cm_referents); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5439 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5440 keep_cm_referents.work(0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5441 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5442 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5443 set_par_threads(0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5444 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5445 // Closure to test whether a referent is alive. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5446 G1STWIsAliveClosure is_alive(this); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5447 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5448 // Even when parallel reference processing is enabled, the processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5449 // 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
|
5450 // 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
|
5451 // JNI refs. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5452 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5453 // Use only a single queue for this PSS. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5454 G1ParScanThreadState pss(this, 0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5455 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5456 // We do not embed a reference processor in the copying/scanning |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5457 // closures while we're actually processing the discovered |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5458 // reference objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5459 G1ParScanHeapEvacClosure scan_evac_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5460 G1ParScanHeapEvacFailureClosure evac_failure_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5461 G1ParScanPartialArrayClosure partial_scan_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5462 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5463 pss.set_evac_closure(&scan_evac_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5464 pss.set_evac_failure_closure(&evac_failure_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5465 pss.set_partial_scan_closure(&partial_scan_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5466 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5467 assert(pss.refs()->is_empty(), "pre-condition"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5468 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5469 G1ParScanExtRootClosure only_copy_non_heap_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5470 G1ParScanPermClosure only_copy_perm_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5471 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5472 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5473 G1ParScanAndMarkPermClosure copy_mark_perm_cl(this, &pss, NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5474 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5475 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5476 OopsInHeapRegionClosure* copy_perm_cl = &only_copy_perm_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5477 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5478 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5479 // We also need to mark copied objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5480 copy_non_heap_cl = ©_mark_non_heap_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5481 copy_perm_cl = ©_mark_perm_cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5482 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5483 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5484 // Keep alive closure. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5485 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
|
5486 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5487 // Serial Complete GC closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5488 G1STWDrainQueueClosure drain_queue(this, &pss); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5489 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5490 // Setup the soft refs policy... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5491 rp->setup_policy(false); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5492 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5493 if (!rp->processing_is_mt()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5494 // Serial reference processing... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5495 rp->process_discovered_references(&is_alive, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5496 &keep_alive, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5497 &drain_queue, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5498 NULL); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5499 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5500 // Parallel reference processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5501 assert(rp->num_q() == active_workers, "sanity"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5502 assert(active_workers <= rp->max_num_q(), "sanity"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5503 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5504 G1STWRefProcTaskExecutor par_task_executor(this, workers(), _task_queues, active_workers); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5505 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
|
5506 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5507 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5508 // We have completed copying any necessary live referent objects |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5509 // (that were not copied during the actual pause) so we can |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5510 // retire any active alloc buffers |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5511 pss.retire_alloc_buffers(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5512 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
|
5513 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5514 double ref_proc_time = os::elapsedTime() - ref_proc_start; |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5515 g1_policy()->phase_times()->record_ref_proc_time(ref_proc_time * 1000.0); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5516 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5517 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5518 // Weak Reference processing during an evacuation pause (part 2). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5519 void G1CollectedHeap::enqueue_discovered_references() { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5520 double ref_enq_start = os::elapsedTime(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5521 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5522 ReferenceProcessor* rp = _ref_processor_stw; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5523 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
|
5524 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5525 // Now enqueue any remaining on the discovered lists on to |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5526 // the pending list. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5527 if (!rp->processing_is_mt()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5528 // Serial reference processing... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5529 rp->enqueue_discovered_references(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5530 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5531 // Parallel reference enqueuing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5532 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5533 uint active_workers = (ParallelGCThreads > 0 ? workers()->active_workers() : 1); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5534 assert(active_workers == workers()->active_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5535 "Need to reset active_workers"); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5536 assert(rp->num_q() == active_workers, "sanity"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5537 assert(active_workers <= rp->max_num_q(), "sanity"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5538 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5539 G1STWRefProcTaskExecutor par_task_executor(this, workers(), _task_queues, active_workers); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5540 rp->enqueue_discovered_references(&par_task_executor); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5541 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5542 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5543 rp->verify_no_references_recorded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5544 assert(!rp->discovery_enabled(), "should have been disabled"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5545 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5546 // FIXME |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5547 // CM's reference processing also cleans up the string and symbol tables. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5548 // Should we do that here also? We could, but it is a serial operation |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5549 // and could signicantly increase the pause time. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5550 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5551 double ref_enq_time = os::elapsedTime() - ref_enq_start; |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5552 g1_policy()->phase_times()->record_ref_enq_time(ref_enq_time * 1000.0); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5553 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5554 |
| 342 | 5555 void G1CollectedHeap::evacuate_collection_set() { |
|
4781
bacb651cf5bf
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
4728
diff
changeset
|
5556 _expand_heap_after_alloc_failure = true; |
| 342 | 5557 set_evacuation_failed(false); |
| 5558 | |
| 5559 g1_rem_set()->prepare_for_oops_into_collection_set_do(); | |
| 5560 concurrent_g1_refine()->set_use_cache(false); | |
| 889 | 5561 concurrent_g1_refine()->clear_hot_cache_claimed_index(); |
| 5562 | |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5563 uint n_workers; |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5564 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5565 n_workers = |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5566 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5567 workers()->active_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5568 Threads::number_of_non_daemon_threads()); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5569 assert(UseDynamicNumberOfGCThreads || |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5570 n_workers == workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5571 "If not dynamic should be using all the workers"); |
| 4711 | 5572 workers()->set_active_workers(n_workers); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5573 set_par_threads(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5574 } else { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5575 assert(n_par_threads() == 0, |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5576 "Should be the original non-parallel value"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5577 n_workers = 1; |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5578 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5579 |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5580 G1ParTask g1_par_task(this, _task_queues); |
| 342 | 5581 |
| 5582 init_for_evac_failure(NULL); | |
| 5583 | |
| 5584 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
|
5585 |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5586 assert(dirty_card_queue_set().completed_buffers_num() == 0, "Should be empty"); |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5587 double start_par_time_sec = os::elapsedTime(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5588 double end_par_time_sec; |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5589 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5590 { |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5591 StrongRootsScope srs(this); |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5592 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5593 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5594 // The individual threads will set their evac-failure closures. |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5595 if (ParallelGCVerbose) G1ParScanThreadState::print_termination_stats_hdr(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5596 // These tasks use ShareHeap::_process_strong_tasks |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5597 assert(UseDynamicNumberOfGCThreads || |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5598 workers()->active_workers() == workers()->total_workers(), |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5599 "If not dynamic should be using all the workers"); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5600 workers()->run_task(&g1_par_task); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5601 } else { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5602 g1_par_task.set_for_termination(n_workers); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5603 g1_par_task.work(0); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5604 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5605 end_par_time_sec = os::elapsedTime(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5606 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5607 // Closing the inner scope will execute the destructor |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5608 // for the StrongRootsScope object. We record the current |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5609 // elapsed time before closing the scope so that time |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5610 // taken for the SRS destructor is NOT included in the |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5611 // reported parallel time. |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5612 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5613 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5614 double par_time_ms = (end_par_time_sec - start_par_time_sec) * 1000.0; |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5615 g1_policy()->phase_times()->record_par_time(par_time_ms); |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5616 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5617 double code_root_fixup_time_ms = |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5618 (os::elapsedTime() - end_par_time_sec) * 1000.0; |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5619 g1_policy()->phase_times()->record_code_root_fixup_time(code_root_fixup_time_ms); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5620 |
| 342 | 5621 set_par_threads(0); |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5622 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5623 // Process any discovered reference objects - we have |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5624 // to do this _before_ we retire the GC alloc regions |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5625 // as we may have to copy some 'reachable' referent |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5626 // objects (and their reachable sub-graphs) that were |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5627 // not copied during the pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5628 process_discovered_references(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5629 |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5630 // Weak root processing. |
|
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5631 // 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
|
5632 // 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
|
5633 // here too. |
| 342 | 5634 { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5635 G1STWIsAliveClosure is_alive(this); |
| 342 | 5636 G1KeepAliveClosure keep_alive(this); |
| 5637 JNIHandles::weak_oops_do(&is_alive, &keep_alive); | |
| 5638 } | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5639 |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
5640 release_gc_alloc_regions(); |
| 342 | 5641 g1_rem_set()->cleanup_after_oops_into_collection_set_do(); |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5642 |
| 889 | 5643 concurrent_g1_refine()->clear_hot_cache(); |
| 342 | 5644 concurrent_g1_refine()->set_use_cache(true); |
| 5645 | |
| 5646 finalize_for_evac_failure(); | |
| 5647 | |
| 5648 if (evacuation_failed()) { | |
| 5649 remove_self_forwarding_pointers(); | |
|
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
5650 if (G1Log::finer()) { |
| 6059 | 5651 gclog_or_tty->print(" (to-space exhausted)"); |
|
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
5652 } else if (G1Log::fine()) { |
| 342 | 5653 gclog_or_tty->print("--"); |
| 5654 } | |
| 5655 } | |
| 5656 | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5657 // Enqueue any remaining references remaining on the STW |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5658 // reference processor's discovered lists. We need to do |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5659 // this after the card table is cleaned (and verified) as |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5660 // the act of enqueuing entries on to the pending list |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5661 // will log these updates (and dirty their associated |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5662 // cards). We need these updates logged to update any |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5663 // RSets. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5664 enqueue_discovered_references(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5665 |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5666 if (G1DeferredRSUpdate) { |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5667 RedirtyLoggedCardTableEntryFastClosure redirty; |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5668 dirty_card_queue_set().set_closure(&redirty); |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5669 dirty_card_queue_set().apply_closure_to_all_completed_buffers(); |
| 1111 | 5670 |
| 5671 DirtyCardQueueSet& dcq = JavaThread::dirty_card_queue_set(); | |
| 5672 dcq.merge_bufferlists(&dirty_card_queue_set()); | |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5673 assert(dirty_card_queue_set().completed_buffers_num() == 0, "All should be consumed"); |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5674 } |
| 342 | 5675 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
| 5676 } | |
| 5677 | |
| 2173 | 5678 void G1CollectedHeap::free_region_if_empty(HeapRegion* hr, |
| 2152 | 5679 size_t* pre_used, |
| 5680 FreeRegionList* free_list, | |
| 4072 | 5681 OldRegionSet* old_proxy_set, |
| 2152 | 5682 HumongousRegionSet* humongous_proxy_set, |
| 2173 | 5683 HRRSCleanupTask* hrrs_cleanup_task, |
| 2152 | 5684 bool par) { |
| 5685 if (hr->used() > 0 && hr->max_live_bytes() == 0 && !hr->is_young()) { | |
| 5686 if (hr->isHumongous()) { | |
| 5687 assert(hr->startsHumongous(), "we should only see starts humongous"); | |
| 5688 free_humongous_region(hr, pre_used, free_list, humongous_proxy_set, par); | |
| 5689 } else { | |
| 4072 | 5690 _old_set.remove_with_proxy(hr, old_proxy_set); |
| 2152 | 5691 free_region(hr, pre_used, free_list, par); |
| 342 | 5692 } |
| 2173 | 5693 } else { |
| 5694 hr->rem_set()->do_cleanup_work(hrrs_cleanup_task); | |
| 342 | 5695 } |
| 5696 } | |
| 5697 | |
| 2152 | 5698 void G1CollectedHeap::free_region(HeapRegion* hr, |
| 5699 size_t* pre_used, | |
| 5700 FreeRegionList* free_list, | |
| 5701 bool par) { | |
| 5702 assert(!hr->isHumongous(), "this is only for non-humongous regions"); | |
| 5703 assert(!hr->is_empty(), "the region should not be empty"); | |
| 5704 assert(free_list != NULL, "pre-condition"); | |
| 5705 | |
| 5706 *pre_used += hr->used(); | |
| 5707 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
|
5708 free_list->add_as_head(hr); |
| 2152 | 5709 } |
| 5710 | |
| 5711 void G1CollectedHeap::free_humongous_region(HeapRegion* hr, | |
| 5712 size_t* pre_used, | |
| 5713 FreeRegionList* free_list, | |
| 5714 HumongousRegionSet* humongous_proxy_set, | |
| 5715 bool par) { | |
| 5716 assert(hr->startsHumongous(), "this is only for starts humongous regions"); | |
| 5717 assert(free_list != NULL, "pre-condition"); | |
| 5718 assert(humongous_proxy_set != NULL, "pre-condition"); | |
| 5719 | |
| 5720 size_t hr_used = hr->used(); | |
| 5721 size_t hr_capacity = hr->capacity(); | |
| 5722 size_t hr_pre_used = 0; | |
| 5723 _humongous_set.remove_with_proxy(hr, humongous_proxy_set); | |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5724 // We need to read this before we make the region non-humongous, |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5725 // otherwise the information will be gone. |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5726 uint last_index = hr->last_hc_index(); |
| 2152 | 5727 hr->set_notHumongous(); |
| 5728 free_region(hr, &hr_pre_used, free_list, par); | |
| 5729 | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
5730 uint i = hr->hrs_index() + 1; |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5731 while (i < last_index) { |
| 3766 | 5732 HeapRegion* curr_hr = region_at(i); |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5733 assert(curr_hr->continuesHumongous(), "invariant"); |
| 2152 | 5734 curr_hr->set_notHumongous(); |
| 5735 free_region(curr_hr, &hr_pre_used, free_list, par); | |
| 5736 i += 1; | |
| 5737 } | |
| 5738 assert(hr_pre_used == hr_used, | |
| 5739 err_msg("hr_pre_used: "SIZE_FORMAT" and hr_used: "SIZE_FORMAT" " | |
| 5740 "should be the same", hr_pre_used, hr_used)); | |
| 5741 *pre_used += hr_pre_used; | |
| 5742 } | |
| 5743 | |
| 5744 void G1CollectedHeap::update_sets_after_freeing_regions(size_t pre_used, | |
| 5745 FreeRegionList* free_list, | |
| 4072 | 5746 OldRegionSet* old_proxy_set, |
| 2152 | 5747 HumongousRegionSet* humongous_proxy_set, |
| 5748 bool par) { | |
| 5749 if (pre_used > 0) { | |
| 5750 Mutex* lock = (par) ? ParGCRareEvent_lock : NULL; | |
| 342 | 5751 MutexLockerEx x(lock, Mutex::_no_safepoint_check_flag); |
| 2152 | 5752 assert(_summary_bytes_used >= pre_used, |
| 5753 err_msg("invariant: _summary_bytes_used: "SIZE_FORMAT" " | |
| 5754 "should be >= pre_used: "SIZE_FORMAT, | |
| 5755 _summary_bytes_used, pre_used)); | |
| 342 | 5756 _summary_bytes_used -= pre_used; |
| 2152 | 5757 } |
| 5758 if (free_list != NULL && !free_list->is_empty()) { | |
| 5759 MutexLockerEx x(FreeList_lock, Mutex::_no_safepoint_check_flag); | |
|
2432
455328d90876
7029458: G1: Add newly-reclaimed regions to the beginning of the region free list, not the end
tonyp
parents:
2369
diff
changeset
|
5760 _free_list.add_as_head(free_list); |
| 2152 | 5761 } |
| 4072 | 5762 if (old_proxy_set != NULL && !old_proxy_set->is_empty()) { |
| 5763 MutexLockerEx x(OldSets_lock, Mutex::_no_safepoint_check_flag); | |
| 5764 _old_set.update_from_proxy(old_proxy_set); | |
| 5765 } | |
| 2152 | 5766 if (humongous_proxy_set != NULL && !humongous_proxy_set->is_empty()) { |
| 5767 MutexLockerEx x(OldSets_lock, Mutex::_no_safepoint_check_flag); | |
| 5768 _humongous_set.update_from_proxy(humongous_proxy_set); | |
| 342 | 5769 } |
| 5770 } | |
| 5771 | |
|
796
29e7d79232b9
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|
5772 class G1ParCleanupCTTask : public AbstractGangTask { |
|
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|
5773 CardTableModRefBS* _ct_bs; |
|
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|
5774 G1CollectedHeap* _g1h; |
|
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|
5775 HeapRegion* volatile _su_head; |
|
796
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|
5776 public: |
|
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|
5777 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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|
5778 G1CollectedHeap* g1h) : |
|
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|
5779 AbstractGangTask("G1 Par Cleanup CT Task"), |
|
3830
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|
5780 _ct_bs(ct_bs), _g1h(g1h) { } |
|
796
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|
5781 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5782 void work(uint worker_id) { |
|
796
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|
5783 HeapRegion* r; |
|
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|
5784 while (r = _g1h->pop_dirty_cards_region()) { |
|
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|
5785 clear_cards(r); |
|
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|
5786 } |
|
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|
5787 } |
|
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|
5788 |
|
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|
5789 void clear_cards(HeapRegion* r) { |
|
3830
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|
5790 // Cards of the survivors should have already been dirtied. |
|
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|
5791 if (!r->is_survivor()) { |
|
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|
5792 _ct_bs->clear(MemRegion(r->bottom(), r->end())); |
|
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|
5793 } |
|
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|
5794 } |
|
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|
5795 }; |
|
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|
5796 |
|
940
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|
5797 #ifndef PRODUCT |
|
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|
5798 class G1VerifyCardTableCleanup: public HeapRegionClosure { |
|
3317
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7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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|
5799 G1CollectedHeap* _g1h; |
|
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|
5800 CardTableModRefBS* _ct_bs; |
|
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|
5801 public: |
|
3317
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|
5802 G1VerifyCardTableCleanup(G1CollectedHeap* g1h, CardTableModRefBS* ct_bs) |
|
063382f9b575
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|
5803 : _g1h(g1h), _ct_bs(ct_bs) { } |
|
2433
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|
5804 virtual bool doHeapRegion(HeapRegion* r) { |
|
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|
5805 if (r->is_survivor()) { |
|
3317
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|
5806 _g1h->verify_dirty_region(r); |
|
940
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|
5807 } else { |
|
3317
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|
5808 _g1h->verify_not_dirty_region(r); |
|
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|
5809 } |
|
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|
5810 return false; |
|
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|
5811 } |
|
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|
5812 }; |
|
2433
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|
5813 |
|
3317
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|
5814 void G1CollectedHeap::verify_not_dirty_region(HeapRegion* hr) { |
|
063382f9b575
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|
5815 // All of the region should be clean. |
|
063382f9b575
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|
5816 CardTableModRefBS* ct_bs = (CardTableModRefBS*)barrier_set(); |
|
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|
5817 MemRegion mr(hr->bottom(), hr->end()); |
|
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|
5818 ct_bs->verify_not_dirty_region(mr); |
|
063382f9b575
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|
5819 } |
|
063382f9b575
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|
5820 |
|
063382f9b575
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|
5821 void G1CollectedHeap::verify_dirty_region(HeapRegion* hr) { |
|
063382f9b575
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|
5822 // We cannot guarantee that [bottom(),end()] is dirty. Threads |
|
063382f9b575
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|
5823 // dirty allocated blocks as they allocate them. The thread that |
|
063382f9b575
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|
5824 // retires each region and replaces it with a new one will do a |
|
063382f9b575
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|
5825 // maximal allocation to fill in [pre_dummy_top(),end()] but will |
|
063382f9b575
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|
5826 // not dirty that area (one less thing to have to do while holding |
|
063382f9b575
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changeset
|
5827 // a lock). So we can only verify that [bottom(),pre_dummy_top()] |
|
063382f9b575
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changeset
|
5828 // is dirty. |
|
063382f9b575
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diff
changeset
|
5829 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
|
5830 MemRegion mr(hr->bottom(), hr->pre_dummy_top()); |
|
063382f9b575
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|
5831 ct_bs->verify_dirty_region(mr); |
|
063382f9b575
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|
5832 } |
|
063382f9b575
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|
5833 |
|
2433
abdfc822206f
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diff
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|
5834 void G1CollectedHeap::verify_dirty_young_list(HeapRegion* head) { |
|
3317
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changeset
|
5835 CardTableModRefBS* ct_bs = (CardTableModRefBS*) barrier_set(); |
|
2433
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diff
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|
5836 for (HeapRegion* hr = head; hr != NULL; hr = hr->get_next_young_region()) { |
|
3317
063382f9b575
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diff
changeset
|
5837 verify_dirty_region(hr); |
|
2433
abdfc822206f
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parents:
2432
diff
changeset
|
5838 } |
|
abdfc822206f
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tonyp
parents:
2432
diff
changeset
|
5839 } |
|
abdfc822206f
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tonyp
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2432
diff
changeset
|
5840 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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2432
diff
changeset
|
5841 void G1CollectedHeap::verify_dirty_young_regions() { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
2432
diff
changeset
|
5842 verify_dirty_young_list(_young_list->first_region()); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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diff
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|
5843 } |
|
940
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|
5844 #endif |
|
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diff
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|
5845 |
| 342 | 5846 void G1CollectedHeap::cleanUpCardTable() { |
| 5847 CardTableModRefBS* ct_bs = (CardTableModRefBS*) (barrier_set()); | |
| 5848 double start = os::elapsedTime(); | |
| 5849 | |
| 4023 | 5850 { |
| 5851 // Iterate over the dirty cards region list. | |
| 5852 G1ParCleanupCTTask cleanup_task(ct_bs, this); | |
| 5853 | |
| 4711 | 5854 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 5855 set_par_threads(); | |
| 4023 | 5856 workers()->run_task(&cleanup_task); |
| 5857 set_par_threads(0); | |
| 5858 } else { | |
| 5859 while (_dirty_cards_region_list) { | |
| 5860 HeapRegion* r = _dirty_cards_region_list; | |
| 5861 cleanup_task.clear_cards(r); | |
| 5862 _dirty_cards_region_list = r->get_next_dirty_cards_region(); | |
| 5863 if (_dirty_cards_region_list == r) { | |
| 5864 // The last region. | |
| 5865 _dirty_cards_region_list = NULL; | |
| 5866 } | |
| 5867 r->set_next_dirty_cards_region(NULL); | |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
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|
5868 } |
|
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diff
changeset
|
5869 } |
| 4023 | 5870 #ifndef PRODUCT |
| 5871 if (G1VerifyCTCleanup || VerifyAfterGC) { | |
| 5872 G1VerifyCardTableCleanup cleanup_verifier(this, ct_bs); | |
| 5873 heap_region_iterate(&cleanup_verifier); | |
| 5874 } | |
| 5875 #endif | |
|
940
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|
5876 } |
|
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diff
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|
5877 |
| 342 | 5878 double elapsed = os::elapsedTime() - start; |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5879 g1_policy()->phase_times()->record_clear_ct_time(elapsed * 1000.0); |
| 342 | 5880 } |
| 5881 | |
| 5882 void G1CollectedHeap::free_collection_set(HeapRegion* cs_head) { | |
| 2152 | 5883 size_t pre_used = 0; |
| 5884 FreeRegionList local_free_list("Local List for CSet Freeing"); | |
| 5885 | |
| 342 | 5886 double young_time_ms = 0.0; |
| 5887 double non_young_time_ms = 0.0; | |
| 5888 | |
|
1394
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diff
changeset
|
5889 // Since the collection set is a superset of the the young list, |
|
1316cec51b4d
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diff
changeset
|
5890 // all we need to do to clear the young list is clear its |
|
1316cec51b4d
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diff
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|
5891 // head and length, and unlink any young regions in the code below |
|
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changeset
|
5892 _young_list->clear(); |
|
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diff
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|
5893 |
| 342 | 5894 G1CollectorPolicy* policy = g1_policy(); |
| 5895 | |
| 5896 double start_sec = os::elapsedTime(); | |
| 5897 bool non_young = true; | |
| 5898 | |
| 5899 HeapRegion* cur = cs_head; | |
| 5900 int age_bound = -1; | |
| 5901 size_t rs_lengths = 0; | |
| 5902 | |
| 5903 while (cur != NULL) { | |
| 2361 | 5904 assert(!is_on_master_free_list(cur), "sanity"); |
| 342 | 5905 if (non_young) { |
| 5906 if (cur->is_young()) { | |
| 5907 double end_sec = os::elapsedTime(); | |
| 5908 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
| 5909 non_young_time_ms += elapsed_ms; | |
| 5910 | |
| 5911 start_sec = os::elapsedTime(); | |
| 5912 non_young = false; | |
| 5913 } | |
| 5914 } else { | |
|
4097
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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diff
changeset
|
5915 if (!cur->is_young()) { |
|
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diff
changeset
|
5916 double end_sec = os::elapsedTime(); |
|
dc467e8b2c5e
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4095
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|
5917 double elapsed_ms = (end_sec - start_sec) * 1000.0; |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
5918 young_time_ms += elapsed_ms; |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
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4095
diff
changeset
|
5919 |
|
dc467e8b2c5e
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4095
diff
changeset
|
5920 start_sec = os::elapsedTime(); |
|
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diff
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|
5921 non_young = true; |
|
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diff
changeset
|
5922 } |
| 342 | 5923 } |
| 5924 | |
| 5925 rs_lengths += cur->rem_set()->occupied(); | |
| 5926 | |
| 5927 HeapRegion* next = cur->next_in_collection_set(); | |
| 5928 assert(cur->in_collection_set(), "bad CS"); | |
| 5929 cur->set_next_in_collection_set(NULL); | |
| 5930 cur->set_in_collection_set(false); | |
| 5931 | |
| 5932 if (cur->is_young()) { | |
| 5933 int index = cur->young_index_in_cset(); | |
|
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4073
diff
changeset
|
5934 assert(index != -1, "invariant"); |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
5935 assert((uint) index < policy->young_cset_region_length(), "invariant"); |
| 342 | 5936 size_t words_survived = _surviving_young_words[index]; |
| 5937 cur->record_surv_words_in_group(words_survived); | |
|
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|
5938 |
|
1316cec51b4d
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diff
changeset
|
5939 // At this point the we have 'popped' cur from the collection set |
|
1316cec51b4d
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changeset
|
5940 // (linked via next_in_collection_set()) but it is still in the |
|
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
5941 // young list (linked via next_young_region()). Clear the |
|
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
5942 // _next_young_region field. |
|
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
5943 cur->set_next_young_region(NULL); |
| 342 | 5944 } else { |
| 5945 int index = cur->young_index_in_cset(); | |
|
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|
5946 assert(index == -1, "invariant"); |
| 342 | 5947 } |
| 5948 | |
| 5949 assert( (cur->is_young() && cur->young_index_in_cset() > -1) || | |
| 5950 (!cur->is_young() && cur->young_index_in_cset() == -1), | |
| 5951 "invariant" ); | |
| 5952 | |
| 5953 if (!cur->evacuation_failed()) { | |
|
4097
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
5954 MemRegion used_mr = cur->used_region(); |
|
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
5955 |
| 342 | 5956 // And the region is empty. |
|
4097
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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diff
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|
5957 assert(!used_mr.is_empty(), "Should not have empty regions in a CS."); |
| 2152 | 5958 free_region(cur, &pre_used, &local_free_list, false /* par */); |
| 342 | 5959 } else { |
| 5960 cur->uninstall_surv_rate_group(); | |
|
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|
5961 if (cur->is_young()) { |
| 342 | 5962 cur->set_young_index_in_cset(-1); |
|
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7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
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|
5963 } |
| 342 | 5964 cur->set_not_young(); |
| 5965 cur->set_evacuation_failed(false); | |
| 4072 | 5966 // The region is now considered to be old. |
| 5967 _old_set.add(cur); | |
| 342 | 5968 } |
| 5969 cur = next; | |
| 5970 } | |
| 5971 | |
| 5972 policy->record_max_rs_lengths(rs_lengths); | |
| 5973 policy->cset_regions_freed(); | |
| 5974 | |
| 5975 double end_sec = os::elapsedTime(); | |
| 5976 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
|
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|
5977 |
|
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|
5978 if (non_young) { |
| 342 | 5979 non_young_time_ms += elapsed_ms; |
|
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
5980 } else { |
| 342 | 5981 young_time_ms += elapsed_ms; |
|
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|
5982 } |
| 342 | 5983 |
| 2152 | 5984 update_sets_after_freeing_regions(pre_used, &local_free_list, |
| 4072 | 5985 NULL /* old_proxy_set */, |
| 2152 | 5986 NULL /* humongous_proxy_set */, |
| 5987 false /* par */); | |
|
6219
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7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
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diff
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|
5988 policy->phase_times()->record_young_free_cset_time_ms(young_time_ms); |
|
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7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
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|
5989 policy->phase_times()->record_non_young_free_cset_time_ms(non_young_time_ms); |
| 342 | 5990 } |
| 5991 | |
|
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|
5992 // This routine is similar to the above but does not record |
|
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|
5993 // any policy statistics or update free lists; we are abandoning |
|
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|
5994 // the current incremental collection set in preparation of a |
|
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|
5995 // full collection. After the full GC we will start to build up |
|
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
5996 // the incremental collection set again. |
|
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|
5997 // This is only called when we're doing a full collection |
|
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|
5998 // and is immediately followed by the tearing down of the young list. |
|
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|
5999 |
|
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6000 void G1CollectedHeap::abandon_collection_set(HeapRegion* cs_head) { |
|
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6001 HeapRegion* cur = cs_head; |
|
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6002 |
|
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
changeset
|
6003 while (cur != NULL) { |
|
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6004 HeapRegion* next = cur->next_in_collection_set(); |
|
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changeset
|
6005 assert(cur->in_collection_set(), "bad CS"); |
|
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|
6006 cur->set_next_in_collection_set(NULL); |
|
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6007 cur->set_in_collection_set(false); |
|
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6008 cur->set_young_index_in_cset(-1); |
|
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|
6009 cur = next; |
|
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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changeset
|
6010 } |
|
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|
6011 } |
|
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|
6012 |
| 2152 | 6013 void G1CollectedHeap::set_free_regions_coming() { |
| 6014 if (G1ConcRegionFreeingVerbose) { | |
| 6015 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
| 6016 "setting free regions coming"); | |
| 6017 } | |
| 6018 | |
| 6019 assert(!free_regions_coming(), "pre-condition"); | |
| 6020 _free_regions_coming = true; | |
| 342 | 6021 } |
| 6022 | |
| 2152 | 6023 void G1CollectedHeap::reset_free_regions_coming() { |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
6024 assert(free_regions_coming(), "pre-condition"); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
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diff
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|
6025 |
| 2152 | 6026 { |
| 6027 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
| 6028 _free_regions_coming = false; | |
| 6029 SecondaryFreeList_lock->notify_all(); | |
| 6030 } | |
| 6031 | |
| 6032 if (G1ConcRegionFreeingVerbose) { | |
| 6033 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
| 6034 "reset free regions coming"); | |
| 342 | 6035 } |
| 6036 } | |
| 6037 | |
| 2152 | 6038 void G1CollectedHeap::wait_while_free_regions_coming() { |
| 6039 // Most of the time we won't have to wait, so let's do a quick test | |
| 6040 // first before we take the lock. | |
| 6041 if (!free_regions_coming()) { | |
| 6042 return; | |
| 6043 } | |
| 6044 | |
| 6045 if (G1ConcRegionFreeingVerbose) { | |
| 6046 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
| 6047 "waiting for free regions"); | |
| 342 | 6048 } |
| 6049 | |
| 6050 { | |
| 2152 | 6051 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
| 6052 while (free_regions_coming()) { | |
| 6053 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
| 342 | 6054 } |
| 2152 | 6055 } |
| 6056 | |
| 6057 if (G1ConcRegionFreeingVerbose) { | |
| 6058 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
| 6059 "done waiting for free regions"); | |
| 6060 } | |
| 342 | 6061 } |
| 6062 | |
| 6063 void G1CollectedHeap::set_region_short_lived_locked(HeapRegion* hr) { | |
| 6064 assert(heap_lock_held_for_gc(), | |
| 6065 "the heap lock should already be held by or for this thread"); | |
| 6066 _young_list->push_region(hr); | |
| 6067 } | |
| 6068 | |
| 6069 class NoYoungRegionsClosure: public HeapRegionClosure { | |
| 6070 private: | |
| 6071 bool _success; | |
| 6072 public: | |
| 6073 NoYoungRegionsClosure() : _success(true) { } | |
| 6074 bool doHeapRegion(HeapRegion* r) { | |
| 6075 if (r->is_young()) { | |
| 6076 gclog_or_tty->print_cr("Region ["PTR_FORMAT", "PTR_FORMAT") tagged as young", | |
| 6077 r->bottom(), r->end()); | |
| 6078 _success = false; | |
| 6079 } | |
| 6080 return false; | |
| 6081 } | |
| 6082 bool success() { return _success; } | |
| 6083 }; | |
| 6084 | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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|
6085 bool G1CollectedHeap::check_young_list_empty(bool check_heap, bool check_sample) { |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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parents:
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diff
changeset
|
6086 bool ret = _young_list->check_list_empty(check_sample); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
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diff
changeset
|
6087 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
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diff
changeset
|
6088 if (check_heap) { |
| 342 | 6089 NoYoungRegionsClosure closure; |
| 6090 heap_region_iterate(&closure); | |
| 6091 ret = ret && closure.success(); | |
| 6092 } | |
| 6093 | |
| 6094 return ret; | |
| 6095 } | |
| 6096 | |
| 4072 | 6097 class TearDownRegionSetsClosure : public HeapRegionClosure { |
| 6098 private: | |
| 6099 OldRegionSet *_old_set; | |
| 2152 | 6100 |
| 342 | 6101 public: |
| 4072 | 6102 TearDownRegionSetsClosure(OldRegionSet* old_set) : _old_set(old_set) { } |
| 2152 | 6103 |
| 342 | 6104 bool doHeapRegion(HeapRegion* r) { |
| 4072 | 6105 if (r->is_empty()) { |
| 6106 // We ignore empty regions, we'll empty the free list afterwards | |
| 6107 } else if (r->is_young()) { | |
| 6108 // We ignore young regions, we'll empty the young list afterwards | |
| 6109 } else if (r->isHumongous()) { | |
| 6110 // We ignore humongous regions, we're not tearing down the | |
| 6111 // humongous region set | |
| 342 | 6112 } else { |
| 4072 | 6113 // The rest should be old |
| 6114 _old_set->remove(r); | |
| 342 | 6115 } |
| 6116 return false; | |
| 6117 } | |
| 6118 | |
| 4072 | 6119 ~TearDownRegionSetsClosure() { |
| 6120 assert(_old_set->is_empty(), "post-condition"); | |
| 2152 | 6121 } |
| 342 | 6122 }; |
| 6123 | |
| 4072 | 6124 void G1CollectedHeap::tear_down_region_sets(bool free_list_only) { |
| 6125 assert_at_safepoint(true /* should_be_vm_thread */); | |
| 6126 | |
| 6127 if (!free_list_only) { | |
| 6128 TearDownRegionSetsClosure cl(&_old_set); | |
| 6129 heap_region_iterate(&cl); | |
| 6130 | |
| 6131 // Need to do this after the heap iteration to be able to | |
| 6132 // recognize the young regions and ignore them during the iteration. | |
| 6133 _young_list->empty_list(); | |
| 6134 } | |
| 6135 _free_list.remove_all(); | |
| 6136 } | |
| 6137 | |
| 6138 class RebuildRegionSetsClosure : public HeapRegionClosure { | |
| 6139 private: | |
| 6140 bool _free_list_only; | |
| 6141 OldRegionSet* _old_set; | |
| 6142 FreeRegionList* _free_list; | |
| 6143 size_t _total_used; | |
| 6144 | |
| 6145 public: | |
| 6146 RebuildRegionSetsClosure(bool free_list_only, | |
| 6147 OldRegionSet* old_set, FreeRegionList* free_list) : | |
| 6148 _free_list_only(free_list_only), | |
| 6149 _old_set(old_set), _free_list(free_list), _total_used(0) { | |
| 6150 assert(_free_list->is_empty(), "pre-condition"); | |
| 6151 if (!free_list_only) { | |
| 6152 assert(_old_set->is_empty(), "pre-condition"); | |
| 6153 } | |
| 6154 } | |
| 6155 | |
| 6156 bool doHeapRegion(HeapRegion* r) { | |
| 6157 if (r->continuesHumongous()) { | |
| 6158 return false; | |
| 6159 } | |
| 6160 | |
| 6161 if (r->is_empty()) { | |
| 6162 // Add free regions to the free list | |
| 6163 _free_list->add_as_tail(r); | |
| 6164 } else if (!_free_list_only) { | |
| 6165 assert(!r->is_young(), "we should not come across young regions"); | |
| 6166 | |
| 6167 if (r->isHumongous()) { | |
| 6168 // We ignore humongous regions, we left the humongous set unchanged | |
| 6169 } else { | |
| 6170 // The rest should be old, add them to the old set | |
| 6171 _old_set->add(r); | |
| 6172 } | |
| 6173 _total_used += r->used(); | |
| 6174 } | |
| 6175 | |
| 6176 return false; | |
| 6177 } | |
| 6178 | |
| 6179 size_t total_used() { | |
| 6180 return _total_used; | |
| 6181 } | |
| 6182 }; | |
| 6183 | |
| 6184 void G1CollectedHeap::rebuild_region_sets(bool free_list_only) { | |
| 6185 assert_at_safepoint(true /* should_be_vm_thread */); | |
| 6186 | |
| 6187 RebuildRegionSetsClosure cl(free_list_only, &_old_set, &_free_list); | |
| 6188 heap_region_iterate(&cl); | |
| 6189 | |
| 6190 if (!free_list_only) { | |
| 6191 _summary_bytes_used = cl.total_used(); | |
| 6192 } | |
| 6193 assert(_summary_bytes_used == recalculate_used(), | |
| 6194 err_msg("inconsistent _summary_bytes_used, " | |
| 6195 "value: "SIZE_FORMAT" recalculated: "SIZE_FORMAT, | |
| 6196 _summary_bytes_used, recalculate_used())); | |
| 342 | 6197 } |
| 6198 | |
| 6199 void G1CollectedHeap::set_refine_cte_cl_concurrency(bool concurrent) { | |
| 6200 _refine_cte_cl->set_concurrent(concurrent); | |
| 6201 } | |
| 6202 | |
| 6203 bool G1CollectedHeap::is_in_closed_subset(const void* p) const { | |
| 6204 HeapRegion* hr = heap_region_containing(p); | |
| 6205 if (hr == NULL) { | |
| 6206 return is_in_permanent(p); | |
| 6207 } else { | |
| 6208 return hr->is_in(p); | |
| 6209 } | |
| 6210 } | |
| 2152 | 6211 |
|
3830
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7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
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3824
diff
changeset
|
6212 // Methods for the mutator alloc region |
|
f44782f04dd4
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3824
diff
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|
6213 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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diff
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|
6214 HeapRegion* G1CollectedHeap::new_mutator_alloc_region(size_t word_size, |
|
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7023069: G1: Introduce symmetric locking in the slow allocation path
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diff
changeset
|
6215 bool force) { |
|
abdfc822206f
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diff
changeset
|
6216 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
|
abdfc822206f
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2432
diff
changeset
|
6217 assert(!force || g1_policy()->can_expand_young_list(), |
|
abdfc822206f
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2432
diff
changeset
|
6218 "if force is true we should be able to expand the young list"); |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
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3777
diff
changeset
|
6219 bool young_list_full = g1_policy()->is_young_list_full(); |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
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3777
diff
changeset
|
6220 if (force || !young_list_full) { |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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2432
diff
changeset
|
6221 HeapRegion* new_alloc_region = new_region(word_size, |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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2432
diff
changeset
|
6222 false /* do_expand */); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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diff
changeset
|
6223 if (new_alloc_region != NULL) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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2432
diff
changeset
|
6224 set_region_short_lived_locked(new_alloc_region); |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
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3777
diff
changeset
|
6225 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Eden, young_list_full); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
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2432
diff
changeset
|
6226 return new_alloc_region; |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
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2432
diff
changeset
|
6227 } |
|
abdfc822206f
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2432
diff
changeset
|
6228 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
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2432
diff
changeset
|
6229 return NULL; |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
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2432
diff
changeset
|
6230 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
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2432
diff
changeset
|
6231 |
|
abdfc822206f
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tonyp
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2432
diff
changeset
|
6232 void G1CollectedHeap::retire_mutator_alloc_region(HeapRegion* alloc_region, |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
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2432
diff
changeset
|
6233 size_t allocated_bytes) { |
|
abdfc822206f
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2432
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changeset
|
6234 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
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diff
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|
6235 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:
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diff
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|
6236 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
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diff
changeset
|
6237 g1_policy()->add_region_to_incremental_cset_lhs(alloc_region); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
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diff
changeset
|
6238 _summary_bytes_used += allocated_bytes; |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6239 _hr_printer.retire(alloc_region); |
|
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6240 // 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
|
6241 // 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
|
6242 // used space has been recored in _summary_bytes_used. |
|
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6243 g1mm()->update_eden_size(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
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diff
changeset
|
6244 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
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diff
changeset
|
6245 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
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diff
changeset
|
6246 HeapRegion* MutatorAllocRegion::allocate_new_region(size_t word_size, |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
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diff
changeset
|
6247 bool force) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
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diff
changeset
|
6248 return _g1h->new_mutator_alloc_region(word_size, force); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
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diff
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|
6249 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6250 |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6251 void G1CollectedHeap::set_par_threads() { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6252 // 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
|
6253 // in the workgroup. |
| 4711 | 6254 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
|
6255 uint n_workers = workers()->active_workers(); |
| 4711 | 6256 assert(UseDynamicNumberOfGCThreads || |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6257 n_workers == workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6258 "Otherwise should be using the total number of workers"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6259 if (n_workers == 0) { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6260 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
|
6261 n_workers = ParallelGCThreads; |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6262 workers()->set_active_workers(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6263 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6264 set_par_threads(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6265 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6266 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
2432
diff
changeset
|
6267 void MutatorAllocRegion::retire_region(HeapRegion* alloc_region, |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
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diff
changeset
|
6268 size_t allocated_bytes) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6269 _g1h->retire_mutator_alloc_region(alloc_region, allocated_bytes); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
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diff
changeset
|
6270 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6271 |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6272 // 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
|
6273 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6274 HeapRegion* G1CollectedHeap::new_gc_alloc_region(size_t word_size, |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
6275 uint count, |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6276 GCAllocPurpose ap) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6277 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
|
6278 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6279 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
|
6280 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
|
6281 true /* do_expand */); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6282 if (new_alloc_region != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6283 // 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
|
6284 // 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
|
6285 // for survivors too. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6286 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
|
6287 if (ap == GCAllocForSurvived) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6288 new_alloc_region->set_survivor(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6289 _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
|
6290 } else { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6291 _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
|
6292 } |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
6293 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
|
6294 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
|
6295 return new_alloc_region; |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6296 } else { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6297 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
|
6298 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6299 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6300 return NULL; |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6301 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6302 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6303 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
|
6304 size_t allocated_bytes, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6305 GCAllocPurpose ap) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
6306 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
|
6307 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
|
6308 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
|
6309 if (ap == GCAllocForSurvived) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6310 young_list()->add_survivor_region(alloc_region); |
| 4072 | 6311 } else { |
| 6312 _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
|
6313 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6314 _hr_printer.retire(alloc_region); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6315 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6316 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6317 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
|
6318 bool force) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6319 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
|
6320 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
|
6321 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6322 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6323 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
|
6324 size_t allocated_bytes) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6325 _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
|
6326 GCAllocForSurvived); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6327 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6328 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6329 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
|
6330 bool force) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6331 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
|
6332 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
|
6333 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6334 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6335 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
|
6336 size_t allocated_bytes) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6337 _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
|
6338 GCAllocForTenured); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6339 } |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6340 // Heap region set verification |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6341 |
| 2152 | 6342 class VerifyRegionListsClosure : public HeapRegionClosure { |
| 6343 private: | |
| 4072 | 6344 FreeRegionList* _free_list; |
| 6345 OldRegionSet* _old_set; | |
| 2152 | 6346 HumongousRegionSet* _humongous_set; |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
6347 uint _region_count; |
| 2152 | 6348 |
| 6349 public: | |
| 4072 | 6350 VerifyRegionListsClosure(OldRegionSet* old_set, |
| 6351 HumongousRegionSet* humongous_set, | |
| 2152 | 6352 FreeRegionList* free_list) : |
| 4072 | 6353 _old_set(old_set), _humongous_set(humongous_set), |
| 6354 _free_list(free_list), _region_count(0) { } | |
| 2152 | 6355 |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
6356 uint region_count() { return _region_count; } |
| 2152 | 6357 |
| 6358 bool doHeapRegion(HeapRegion* hr) { | |
| 6359 _region_count += 1; | |
| 6360 | |
| 6361 if (hr->continuesHumongous()) { | |
| 6362 return false; | |
| 6363 } | |
| 6364 | |
| 6365 if (hr->is_young()) { | |
| 6366 // TODO | |
| 6367 } else if (hr->startsHumongous()) { | |
| 6368 _humongous_set->verify_next_region(hr); | |
| 6369 } else if (hr->is_empty()) { | |
| 6370 _free_list->verify_next_region(hr); | |
| 4072 | 6371 } else { |
| 6372 _old_set->verify_next_region(hr); | |
| 2152 | 6373 } |
| 6374 return false; | |
| 6375 } | |
| 6376 }; | |
| 6377 | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
6378 HeapRegion* G1CollectedHeap::new_heap_region(uint hrs_index, |
| 3766 | 6379 HeapWord* bottom) { |
| 6380 HeapWord* end = bottom + HeapRegion::GrainWords; | |
| 6381 MemRegion mr(bottom, end); | |
| 6382 assert(_g1_reserved.contains(mr), "invariant"); | |
| 6383 // This might return NULL if the allocation fails | |
| 6384 return new HeapRegion(hrs_index, _bot_shared, mr, true /* is_zeroed */); | |
| 6385 } | |
| 6386 | |
| 2152 | 6387 void G1CollectedHeap::verify_region_sets() { |
| 6388 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); | |
| 6389 | |
| 6390 // First, check the explicit lists. | |
| 6391 _free_list.verify(); | |
| 6392 { | |
| 6393 // Given that a concurrent operation might be adding regions to | |
| 6394 // the secondary free list we have to take the lock before | |
| 6395 // verifying it. | |
| 6396 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
| 6397 _secondary_free_list.verify(); | |
| 6398 } | |
| 4072 | 6399 _old_set.verify(); |
| 2152 | 6400 _humongous_set.verify(); |
| 6401 | |
| 6402 // If a concurrent region freeing operation is in progress it will | |
| 6403 // be difficult to correctly attributed any free regions we come | |
| 6404 // across to the correct free list given that they might belong to | |
| 6405 // one of several (free_list, secondary_free_list, any local lists, | |
| 6406 // etc.). So, if that's the case we will skip the rest of the | |
| 6407 // verification operation. Alternatively, waiting for the concurrent | |
| 6408 // operation to complete will have a non-trivial effect on the GC's | |
| 6409 // operation (no concurrent operation will last longer than the | |
| 6410 // interval between two calls to verification) and it might hide | |
| 6411 // any issues that we would like to catch during testing. | |
| 6412 if (free_regions_coming()) { | |
| 6413 return; | |
| 6414 } | |
| 6415 | |
| 2361 | 6416 // Make sure we append the secondary_free_list on the free_list so |
| 6417 // that all free regions we will come across can be safely | |
| 6418 // attributed to the free_list. | |
| 6419 append_secondary_free_list_if_not_empty_with_lock(); | |
| 2152 | 6420 |
| 6421 // Finally, make sure that the region accounting in the lists is | |
| 6422 // consistent with what we see in the heap. | |
| 4072 | 6423 _old_set.verify_start(); |
| 2152 | 6424 _humongous_set.verify_start(); |
| 6425 _free_list.verify_start(); | |
| 6426 | |
| 4072 | 6427 VerifyRegionListsClosure cl(&_old_set, &_humongous_set, &_free_list); |
| 2152 | 6428 heap_region_iterate(&cl); |
| 6429 | |
| 4072 | 6430 _old_set.verify_end(); |
| 2152 | 6431 _humongous_set.verify_end(); |
| 6432 _free_list.verify_end(); | |
| 342 | 6433 } |