Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp @ 20256:b0b97602393a
8033923: Use BufferingOopClosure for G1 code root scanning
Reviewed-by: mgerdin, brutisso
| author | stefank |
|---|---|
| date | Mon, 10 Feb 2014 12:58:09 +0100 |
| parents | 9fec19bb0659 |
| children | 7426d8d76305 |
| rev | line source |
|---|---|
| 342 | 1 /* |
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2 * Copyright (c) 2001, 2014, 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 | |
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25 #if !defined(__clang_major__) && defined(__GNUC__) |
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26 #define ATTRIBUTE_PRINTF(x,y) // FIXME, formats are a mess. |
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27 #endif |
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28 |
| 1972 | 29 #include "precompiled.hpp" |
| 12080 | 30 #include "code/codeCache.hpp" |
| 1972 | 31 #include "code/icBuffer.hpp" |
| 32 #include "gc_implementation/g1/bufferingOopClosure.hpp" | |
| 33 #include "gc_implementation/g1/concurrentG1Refine.hpp" | |
| 34 #include "gc_implementation/g1/concurrentG1RefineThread.hpp" | |
| 35 #include "gc_implementation/g1/concurrentMarkThread.inline.hpp" | |
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36 #include "gc_implementation/g1/g1AllocRegion.inline.hpp" |
| 1972 | 37 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" |
| 38 #include "gc_implementation/g1/g1CollectorPolicy.hpp" | |
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39 #include "gc_implementation/g1/g1ErgoVerbose.hpp" |
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40 #include "gc_implementation/g1/g1EvacFailure.hpp" |
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41 #include "gc_implementation/g1/g1GCPhaseTimes.hpp" |
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42 #include "gc_implementation/g1/g1Log.hpp" |
| 1972 | 43 #include "gc_implementation/g1/g1MarkSweep.hpp" |
| 44 #include "gc_implementation/g1/g1OopClosures.inline.hpp" | |
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45 #include "gc_implementation/g1/g1ParScanThreadState.inline.hpp" |
| 1972 | 46 #include "gc_implementation/g1/g1RemSet.inline.hpp" |
| 17764 | 47 #include "gc_implementation/g1/g1StringDedup.hpp" |
| 10405 | 48 #include "gc_implementation/g1/g1YCTypes.hpp" |
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49 #include "gc_implementation/g1/heapRegion.inline.hpp" |
| 1972 | 50 #include "gc_implementation/g1/heapRegionRemSet.hpp" |
| 51 #include "gc_implementation/g1/heapRegionSeq.inline.hpp" | |
| 52 #include "gc_implementation/g1/vm_operations_g1.hpp" | |
| 10405 | 53 #include "gc_implementation/shared/gcHeapSummary.hpp" |
| 54 #include "gc_implementation/shared/gcTimer.hpp" | |
| 55 #include "gc_implementation/shared/gcTrace.hpp" | |
| 56 #include "gc_implementation/shared/gcTraceTime.hpp" | |
| 1972 | 57 #include "gc_implementation/shared/isGCActiveMark.hpp" |
| 58 #include "memory/gcLocker.inline.hpp" | |
| 59 #include "memory/generationSpec.hpp" | |
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60 #include "memory/iterator.hpp" |
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61 #include "memory/referenceProcessor.hpp" |
| 1972 | 62 #include "oops/oop.inline.hpp" |
| 63 #include "oops/oop.pcgc.inline.hpp" | |
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64 #include "runtime/orderAccess.inline.hpp" |
| 1972 | 65 #include "runtime/vmThread.hpp" |
| 342 | 66 |
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67 size_t G1CollectedHeap::_humongous_object_threshold_in_words = 0; |
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68 |
| 342 | 69 // turn it on so that the contents of the young list (scan-only / |
| 70 // to-be-collected) are printed at "strategic" points before / during | |
| 71 // / after the collection --- this is useful for debugging | |
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72 #define YOUNG_LIST_VERBOSE 0 |
| 342 | 73 // CURRENT STATUS |
| 74 // This file is under construction. Search for "FIXME". | |
| 75 | |
| 76 // INVARIANTS/NOTES | |
| 77 // | |
| 78 // All allocation activity covered by the G1CollectedHeap interface is | |
| 1973 | 79 // serialized by acquiring the HeapLock. This happens in mem_allocate |
| 80 // and allocate_new_tlab, which are the "entry" points to the | |
| 81 // allocation code from the rest of the JVM. (Note that this does not | |
| 82 // apply to TLAB allocation, which is not part of this interface: it | |
| 83 // is done by clients of this interface.) | |
| 342 | 84 |
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85 // Notes on implementation of parallelism in different tasks. |
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86 // |
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87 // G1ParVerifyTask uses heap_region_par_iterate_chunked() for parallelism. |
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88 // The number of GC workers is passed to heap_region_par_iterate_chunked(). |
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89 // It does use run_task() which sets _n_workers in the task. |
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90 // G1ParTask executes g1_process_strong_roots() -> |
| 10405 | 91 // SharedHeap::process_strong_roots() which calls eventually to |
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92 // CardTableModRefBS::par_non_clean_card_iterate_work() which uses |
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93 // SequentialSubTasksDone. SharedHeap::process_strong_roots() also |
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94 // directly uses SubTasksDone (_process_strong_tasks field in SharedHeap). |
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95 // |
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96 |
| 342 | 97 // Local to this file. |
| 98 | |
| 99 class RefineCardTableEntryClosure: public CardTableEntryClosure { | |
| 100 bool _concurrent; | |
| 101 public: | |
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102 RefineCardTableEntryClosure() : _concurrent(true) { } |
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103 |
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104 bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
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105 bool oops_into_cset = G1CollectedHeap::heap()->g1_rem_set()->refine_card(card_ptr, worker_i, false); |
| 1705 | 106 // This path is executed by the concurrent refine or mutator threads, |
| 107 // concurrently, and so we do not care if card_ptr contains references | |
| 108 // that point into the collection set. | |
| 109 assert(!oops_into_cset, "should be"); | |
| 110 | |
| 20192 | 111 if (_concurrent && SuspendibleThreadSet::should_yield()) { |
| 342 | 112 // Caller will actually yield. |
| 113 return false; | |
| 114 } | |
| 115 // Otherwise, we finished successfully; return true. | |
| 116 return true; | |
| 117 } | |
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118 |
| 342 | 119 void set_concurrent(bool b) { _concurrent = b; } |
| 120 }; | |
| 121 | |
| 122 | |
| 123 class ClearLoggedCardTableEntryClosure: public CardTableEntryClosure { | |
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124 size_t _num_processed; |
| 342 | 125 CardTableModRefBS* _ctbs; |
| 126 int _histo[256]; | |
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127 |
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128 public: |
| 342 | 129 ClearLoggedCardTableEntryClosure() : |
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130 _num_processed(0), _ctbs(G1CollectedHeap::heap()->g1_barrier_set()) |
| 342 | 131 { |
| 132 for (int i = 0; i < 256; i++) _histo[i] = 0; | |
| 133 } | |
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134 |
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135 bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
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136 unsigned char* ujb = (unsigned char*)card_ptr; |
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137 int ind = (int)(*ujb); |
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138 _histo[ind]++; |
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139 |
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140 *card_ptr = (jbyte)CardTableModRefBS::clean_card_val(); |
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141 _num_processed++; |
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142 |
| 342 | 143 return true; |
| 144 } | |
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145 |
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146 size_t num_processed() { return _num_processed; } |
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147 |
| 342 | 148 void print_histo() { |
| 149 gclog_or_tty->print_cr("Card table value histogram:"); | |
| 150 for (int i = 0; i < 256; i++) { | |
| 151 if (_histo[i] != 0) { | |
| 152 gclog_or_tty->print_cr(" %d: %d", i, _histo[i]); | |
| 153 } | |
| 154 } | |
| 155 } | |
| 156 }; | |
| 157 | |
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158 class RedirtyLoggedCardTableEntryClosure : public CardTableEntryClosure { |
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159 private: |
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160 size_t _num_processed; |
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161 |
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162 public: |
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163 RedirtyLoggedCardTableEntryClosure() : CardTableEntryClosure(), _num_processed(0) { } |
| 12343 | 164 |
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165 bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
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166 *card_ptr = CardTableModRefBS::dirty_card_val(); |
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167 _num_processed++; |
| 342 | 168 return true; |
| 169 } | |
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170 |
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171 size_t num_processed() const { return _num_processed; } |
| 342 | 172 }; |
| 173 | |
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174 YoungList::YoungList(G1CollectedHeap* g1h) : |
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175 _g1h(g1h), _head(NULL), _length(0), _last_sampled_rs_lengths(0), |
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176 _survivor_head(NULL), _survivor_tail(NULL), _survivor_length(0) { |
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177 guarantee(check_list_empty(false), "just making sure..."); |
| 342 | 178 } |
| 179 | |
| 180 void YoungList::push_region(HeapRegion *hr) { | |
| 181 assert(!hr->is_young(), "should not already be young"); | |
| 182 assert(hr->get_next_young_region() == NULL, "cause it should!"); | |
| 183 | |
| 184 hr->set_next_young_region(_head); | |
| 185 _head = hr; | |
| 186 | |
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187 _g1h->g1_policy()->set_region_eden(hr, (int) _length); |
| 342 | 188 ++_length; |
| 189 } | |
| 190 | |
| 191 void YoungList::add_survivor_region(HeapRegion* hr) { | |
| 545 | 192 assert(hr->is_survivor(), "should be flagged as survivor region"); |
| 342 | 193 assert(hr->get_next_young_region() == NULL, "cause it should!"); |
| 194 | |
| 195 hr->set_next_young_region(_survivor_head); | |
| 196 if (_survivor_head == NULL) { | |
| 545 | 197 _survivor_tail = hr; |
| 342 | 198 } |
| 199 _survivor_head = hr; | |
| 200 ++_survivor_length; | |
| 201 } | |
| 202 | |
| 203 void YoungList::empty_list(HeapRegion* list) { | |
| 204 while (list != NULL) { | |
| 205 HeapRegion* next = list->get_next_young_region(); | |
| 206 list->set_next_young_region(NULL); | |
| 207 list->uninstall_surv_rate_group(); | |
| 208 list->set_not_young(); | |
| 209 list = next; | |
| 210 } | |
| 211 } | |
| 212 | |
| 213 void YoungList::empty_list() { | |
| 214 assert(check_list_well_formed(), "young list should be well formed"); | |
| 215 | |
| 216 empty_list(_head); | |
| 217 _head = NULL; | |
| 218 _length = 0; | |
| 219 | |
| 220 empty_list(_survivor_head); | |
| 221 _survivor_head = NULL; | |
| 545 | 222 _survivor_tail = NULL; |
| 342 | 223 _survivor_length = 0; |
| 224 | |
| 225 _last_sampled_rs_lengths = 0; | |
| 226 | |
| 227 assert(check_list_empty(false), "just making sure..."); | |
| 228 } | |
| 229 | |
| 230 bool YoungList::check_list_well_formed() { | |
| 231 bool ret = true; | |
| 232 | |
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233 uint length = 0; |
| 342 | 234 HeapRegion* curr = _head; |
| 235 HeapRegion* last = NULL; | |
| 236 while (curr != NULL) { | |
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237 if (!curr->is_young()) { |
| 342 | 238 gclog_or_tty->print_cr("### YOUNG REGION "PTR_FORMAT"-"PTR_FORMAT" " |
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239 "incorrectly tagged (y: %d, surv: %d)", |
| 342 | 240 curr->bottom(), curr->end(), |
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241 curr->is_young(), curr->is_survivor()); |
| 342 | 242 ret = false; |
| 243 } | |
| 244 ++length; | |
| 245 last = curr; | |
| 246 curr = curr->get_next_young_region(); | |
| 247 } | |
| 248 ret = ret && (length == _length); | |
| 249 | |
| 250 if (!ret) { | |
| 251 gclog_or_tty->print_cr("### YOUNG LIST seems not well formed!"); | |
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252 gclog_or_tty->print_cr("### list has %u entries, _length is %u", |
| 342 | 253 length, _length); |
| 254 } | |
| 255 | |
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256 return ret; |
| 342 | 257 } |
| 258 | |
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259 bool YoungList::check_list_empty(bool check_sample) { |
| 342 | 260 bool ret = true; |
| 261 | |
| 262 if (_length != 0) { | |
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263 gclog_or_tty->print_cr("### YOUNG LIST should have 0 length, not %u", |
| 342 | 264 _length); |
| 265 ret = false; | |
| 266 } | |
| 267 if (check_sample && _last_sampled_rs_lengths != 0) { | |
| 268 gclog_or_tty->print_cr("### YOUNG LIST has non-zero last sampled RS lengths"); | |
| 269 ret = false; | |
| 270 } | |
| 271 if (_head != NULL) { | |
| 272 gclog_or_tty->print_cr("### YOUNG LIST does not have a NULL head"); | |
| 273 ret = false; | |
| 274 } | |
| 275 if (!ret) { | |
| 276 gclog_or_tty->print_cr("### YOUNG LIST does not seem empty"); | |
| 277 } | |
| 278 | |
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279 return ret; |
| 342 | 280 } |
| 281 | |
| 282 void | |
| 283 YoungList::rs_length_sampling_init() { | |
| 284 _sampled_rs_lengths = 0; | |
| 285 _curr = _head; | |
| 286 } | |
| 287 | |
| 288 bool | |
| 289 YoungList::rs_length_sampling_more() { | |
| 290 return _curr != NULL; | |
| 291 } | |
| 292 | |
| 293 void | |
| 294 YoungList::rs_length_sampling_next() { | |
| 295 assert( _curr != NULL, "invariant" ); | |
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296 size_t rs_length = _curr->rem_set()->occupied(); |
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297 |
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298 _sampled_rs_lengths += rs_length; |
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299 |
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300 // The current region may not yet have been added to the |
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301 // incremental collection set (it gets added when it is |
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302 // retired as the current allocation region). |
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303 if (_curr->in_collection_set()) { |
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304 // Update the collection set policy information for this region |
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305 _g1h->g1_policy()->update_incremental_cset_info(_curr, rs_length); |
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306 } |
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307 |
| 342 | 308 _curr = _curr->get_next_young_region(); |
| 309 if (_curr == NULL) { | |
| 310 _last_sampled_rs_lengths = _sampled_rs_lengths; | |
| 311 // gclog_or_tty->print_cr("last sampled RS lengths = %d", _last_sampled_rs_lengths); | |
| 312 } | |
| 313 } | |
| 314 | |
| 315 void | |
| 316 YoungList::reset_auxilary_lists() { | |
| 317 guarantee( is_empty(), "young list should be empty" ); | |
| 318 assert(check_list_well_formed(), "young list should be well formed"); | |
| 319 | |
| 320 // Add survivor regions to SurvRateGroup. | |
| 321 _g1h->g1_policy()->note_start_adding_survivor_regions(); | |
| 545 | 322 _g1h->g1_policy()->finished_recalculating_age_indexes(true /* is_survivors */); |
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323 |
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324 int young_index_in_cset = 0; |
| 342 | 325 for (HeapRegion* curr = _survivor_head; |
| 326 curr != NULL; | |
| 327 curr = curr->get_next_young_region()) { | |
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328 _g1h->g1_policy()->set_region_survivor(curr, young_index_in_cset); |
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329 |
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330 // The region is a non-empty survivor so let's add it to |
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331 // the incremental collection set for the next evacuation |
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332 // pause. |
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333 _g1h->g1_policy()->add_region_to_incremental_cset_rhs(curr); |
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334 young_index_in_cset += 1; |
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335 } |
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336 assert((uint) young_index_in_cset == _survivor_length, "post-condition"); |
| 342 | 337 _g1h->g1_policy()->note_stop_adding_survivor_regions(); |
| 338 | |
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339 _head = _survivor_head; |
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340 _length = _survivor_length; |
| 342 | 341 if (_survivor_head != NULL) { |
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342 assert(_survivor_tail != NULL, "cause it shouldn't be"); |
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343 assert(_survivor_length > 0, "invariant"); |
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344 _survivor_tail->set_next_young_region(NULL); |
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345 } |
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346 |
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347 // Don't clear the survivor list handles until the start of |
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348 // the next evacuation pause - we need it in order to re-tag |
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349 // the survivor regions from this evacuation pause as 'young' |
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350 // at the start of the next. |
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351 |
| 545 | 352 _g1h->g1_policy()->finished_recalculating_age_indexes(false /* is_survivors */); |
| 342 | 353 |
| 354 assert(check_list_well_formed(), "young list should be well formed"); | |
| 355 } | |
| 356 | |
| 357 void YoungList::print() { | |
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358 HeapRegion* lists[] = {_head, _survivor_head}; |
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359 const char* names[] = {"YOUNG", "SURVIVOR"}; |
| 342 | 360 |
| 361 for (unsigned int list = 0; list < ARRAY_SIZE(lists); ++list) { | |
| 362 gclog_or_tty->print_cr("%s LIST CONTENTS", names[list]); | |
| 363 HeapRegion *curr = lists[list]; | |
| 364 if (curr == NULL) | |
| 365 gclog_or_tty->print_cr(" empty"); | |
| 366 while (curr != NULL) { | |
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367 gclog_or_tty->print_cr(" "HR_FORMAT", P: "PTR_FORMAT "N: "PTR_FORMAT", age: %4d", |
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368 HR_FORMAT_PARAMS(curr), |
| 342 | 369 curr->prev_top_at_mark_start(), |
| 370 curr->next_top_at_mark_start(), | |
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371 curr->age_in_surv_rate_group_cond()); |
| 342 | 372 curr = curr->get_next_young_region(); |
| 373 } | |
| 374 } | |
| 375 | |
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376 gclog_or_tty->cr(); |
| 342 | 377 } |
| 378 | |
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379 void G1CollectedHeap::push_dirty_cards_region(HeapRegion* hr) |
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380 { |
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381 // Claim the right to put the region on the dirty cards region list |
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382 // by installing a self pointer. |
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383 HeapRegion* next = hr->get_next_dirty_cards_region(); |
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384 if (next == NULL) { |
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385 HeapRegion* res = (HeapRegion*) |
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386 Atomic::cmpxchg_ptr(hr, hr->next_dirty_cards_region_addr(), |
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387 NULL); |
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388 if (res == NULL) { |
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389 HeapRegion* head; |
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390 do { |
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391 // Put the region to the dirty cards region list. |
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392 head = _dirty_cards_region_list; |
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393 next = (HeapRegion*) |
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394 Atomic::cmpxchg_ptr(hr, &_dirty_cards_region_list, head); |
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395 if (next == head) { |
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396 assert(hr->get_next_dirty_cards_region() == hr, |
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397 "hr->get_next_dirty_cards_region() != hr"); |
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398 if (next == NULL) { |
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399 // The last region in the list points to itself. |
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400 hr->set_next_dirty_cards_region(hr); |
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401 } else { |
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402 hr->set_next_dirty_cards_region(next); |
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403 } |
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404 } |
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405 } while (next != head); |
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406 } |
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407 } |
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408 } |
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409 |
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410 HeapRegion* G1CollectedHeap::pop_dirty_cards_region() |
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411 { |
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412 HeapRegion* head; |
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413 HeapRegion* hr; |
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414 do { |
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415 head = _dirty_cards_region_list; |
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416 if (head == NULL) { |
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417 return NULL; |
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418 } |
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419 HeapRegion* new_head = head->get_next_dirty_cards_region(); |
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420 if (head == new_head) { |
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421 // The last region. |
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422 new_head = NULL; |
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423 } |
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424 hr = (HeapRegion*)Atomic::cmpxchg_ptr(new_head, &_dirty_cards_region_list, |
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425 head); |
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426 } while (hr != head); |
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427 assert(hr != NULL, "invariant"); |
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428 hr->set_next_dirty_cards_region(NULL); |
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429 return hr; |
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430 } |
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431 |
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432 #ifdef ASSERT |
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433 // A region is added to the collection set as it is retired |
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434 // so an address p can point to a region which will be in the |
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435 // collection set but has not yet been retired. This method |
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436 // therefore is only accurate during a GC pause after all |
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437 // regions have been retired. It is used for debugging |
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438 // to check if an nmethod has references to objects that can |
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439 // be move during a partial collection. Though it can be |
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440 // inaccurate, it is sufficient for G1 because the conservative |
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441 // implementation of is_scavengable() for G1 will indicate that |
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442 // all nmethods must be scanned during a partial collection. |
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443 bool G1CollectedHeap::is_in_partial_collection(const void* p) { |
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444 HeapRegion* hr = heap_region_containing(p); |
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445 return hr != NULL && hr->in_collection_set(); |
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446 } |
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447 #endif |
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448 |
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449 // Returns true if the reference points to an object that |
| 10405 | 450 // can move in an incremental collection. |
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451 bool G1CollectedHeap::is_scavengable(const void* p) { |
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452 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
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453 G1CollectorPolicy* g1p = g1h->g1_policy(); |
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454 HeapRegion* hr = heap_region_containing(p); |
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455 if (hr == NULL) { |
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456 // null |
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457 assert(p == NULL, err_msg("Not NULL " PTR_FORMAT ,p)); |
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458 return false; |
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459 } else { |
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460 return !hr->isHumongous(); |
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461 } |
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462 } |
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463 |
| 342 | 464 void G1CollectedHeap::check_ct_logs_at_safepoint() { |
| 465 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
| 12343 | 466 CardTableModRefBS* ct_bs = g1_barrier_set(); |
| 342 | 467 |
| 468 // Count the dirty cards at the start. | |
| 469 CountNonCleanMemRegionClosure count1(this); | |
| 470 ct_bs->mod_card_iterate(&count1); | |
| 471 int orig_count = count1.n(); | |
| 472 | |
| 473 // First clear the logged cards. | |
| 474 ClearLoggedCardTableEntryClosure clear; | |
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475 dcqs.apply_closure_to_all_completed_buffers(&clear); |
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476 dcqs.iterate_closure_all_threads(&clear, false); |
| 342 | 477 clear.print_histo(); |
| 478 | |
| 479 // Now ensure that there's no dirty cards. | |
| 480 CountNonCleanMemRegionClosure count2(this); | |
| 481 ct_bs->mod_card_iterate(&count2); | |
| 482 if (count2.n() != 0) { | |
| 483 gclog_or_tty->print_cr("Card table has %d entries; %d originally", | |
| 484 count2.n(), orig_count); | |
| 485 } | |
| 486 guarantee(count2.n() == 0, "Card table should be clean."); | |
| 487 | |
| 488 RedirtyLoggedCardTableEntryClosure redirty; | |
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489 dcqs.apply_closure_to_all_completed_buffers(&redirty); |
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490 dcqs.iterate_closure_all_threads(&redirty, false); |
| 342 | 491 gclog_or_tty->print_cr("Log entries = %d, dirty cards = %d.", |
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492 clear.num_processed(), orig_count); |
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493 guarantee(redirty.num_processed() == clear.num_processed(), |
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494 err_msg("Redirtied "SIZE_FORMAT" cards, bug cleared "SIZE_FORMAT, |
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495 redirty.num_processed(), clear.num_processed())); |
| 342 | 496 |
| 497 CountNonCleanMemRegionClosure count3(this); | |
| 498 ct_bs->mod_card_iterate(&count3); | |
| 499 if (count3.n() != orig_count) { | |
| 500 gclog_or_tty->print_cr("Should have restored them all: orig = %d, final = %d.", | |
| 501 orig_count, count3.n()); | |
| 502 guarantee(count3.n() >= orig_count, "Should have restored them all."); | |
| 503 } | |
| 504 } | |
| 505 | |
| 506 // Private class members. | |
| 507 | |
| 508 G1CollectedHeap* G1CollectedHeap::_g1h; | |
| 509 | |
| 510 // Private methods. | |
| 511 | |
| 2152 | 512 HeapRegion* |
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513 G1CollectedHeap::new_region_try_secondary_free_list(bool is_old) { |
| 2152 | 514 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
| 515 while (!_secondary_free_list.is_empty() || free_regions_coming()) { | |
| 516 if (!_secondary_free_list.is_empty()) { | |
| 517 if (G1ConcRegionFreeingVerbose) { | |
| 518 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
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519 "secondary_free_list has %u entries", |
| 2152 | 520 _secondary_free_list.length()); |
| 521 } | |
| 522 // It looks as if there are free regions available on the | |
| 523 // secondary_free_list. Let's move them to the free_list and try | |
| 524 // again to allocate from it. | |
| 525 append_secondary_free_list(); | |
| 526 | |
| 527 assert(!_free_list.is_empty(), "if the secondary_free_list was not " | |
| 528 "empty we should have moved at least one entry to the free_list"); | |
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529 HeapRegion* res = _free_list.remove_region(is_old); |
| 2152 | 530 if (G1ConcRegionFreeingVerbose) { |
| 531 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 532 "allocated "HR_FORMAT" from secondary_free_list", | |
| 533 HR_FORMAT_PARAMS(res)); | |
| 534 } | |
| 535 return res; | |
| 536 } | |
| 537 | |
| 10405 | 538 // Wait here until we get notified either when (a) there are no |
| 2152 | 539 // more free regions coming or (b) some regions have been moved on |
| 540 // the secondary_free_list. | |
| 541 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
| 542 } | |
| 543 | |
| 544 if (G1ConcRegionFreeingVerbose) { | |
| 545 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 546 "could not allocate from secondary_free_list"); | |
| 547 } | |
| 548 return NULL; | |
| 549 } | |
| 550 | |
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551 HeapRegion* G1CollectedHeap::new_region(size_t word_size, bool is_old, bool do_expand) { |
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552 assert(!isHumongous(word_size) || word_size <= HeapRegion::GrainWords, |
| 2152 | 553 "the only time we use this to allocate a humongous region is " |
| 554 "when we are allocating a single humongous region"); | |
| 555 | |
| 556 HeapRegion* res; | |
| 557 if (G1StressConcRegionFreeing) { | |
| 558 if (!_secondary_free_list.is_empty()) { | |
| 559 if (G1ConcRegionFreeingVerbose) { | |
| 560 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 561 "forced to look at the secondary_free_list"); | |
| 562 } | |
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563 res = new_region_try_secondary_free_list(is_old); |
| 2152 | 564 if (res != NULL) { |
| 565 return res; | |
| 566 } | |
| 567 } | |
| 568 } | |
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569 |
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570 res = _free_list.remove_region(is_old); |
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571 |
| 2152 | 572 if (res == NULL) { |
| 573 if (G1ConcRegionFreeingVerbose) { | |
| 574 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
| 575 "res == NULL, trying the secondary_free_list"); | |
| 576 } | |
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577 res = new_region_try_secondary_free_list(is_old); |
| 2152 | 578 } |
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579 if (res == NULL && do_expand && _expand_heap_after_alloc_failure) { |
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580 // Currently, only attempts to allocate GC alloc regions set |
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581 // do_expand to true. So, we should only reach here during a |
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582 // safepoint. If this assumption changes we might have to |
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583 // reconsider the use of _expand_heap_after_alloc_failure. |
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584 assert(SafepointSynchronize::is_at_safepoint(), "invariant"); |
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585 |
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586 ergo_verbose1(ErgoHeapSizing, |
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587 "attempt heap expansion", |
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588 ergo_format_reason("region allocation request failed") |
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589 ergo_format_byte("allocation request"), |
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590 word_size * HeapWordSize); |
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591 if (expand(word_size * HeapWordSize)) { |
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592 // Given that expand() succeeded in expanding the heap, and we |
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593 // always expand the heap by an amount aligned to the heap |
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594 // region size, the free list should in theory not be empty. |
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595 // In either case remove_region() will check for NULL. |
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596 res = _free_list.remove_region(is_old); |
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597 } else { |
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598 _expand_heap_after_alloc_failure = false; |
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599 } |
| 342 | 600 } |
| 601 return res; | |
| 602 } | |
| 603 | |
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604 uint G1CollectedHeap::humongous_obj_allocate_find_first(uint num_regions, |
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605 size_t word_size) { |
| 2361 | 606 assert(isHumongous(word_size), "word_size should be humongous"); |
| 607 assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); | |
| 608 | |
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609 uint first = G1_NULL_HRS_INDEX; |
| 2152 | 610 if (num_regions == 1) { |
| 611 // Only one region to allocate, no need to go through the slower | |
| 10405 | 612 // path. The caller will attempt the expansion if this fails, so |
| 2152 | 613 // let's not try to expand here too. |
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614 HeapRegion* hr = new_region(word_size, true /* is_old */, false /* do_expand */); |
| 2152 | 615 if (hr != NULL) { |
| 616 first = hr->hrs_index(); | |
| 617 } else { | |
| 3766 | 618 first = G1_NULL_HRS_INDEX; |
| 2152 | 619 } |
| 620 } else { | |
| 621 // We can't allocate humongous regions while cleanupComplete() is | |
| 622 // running, since some of the regions we find to be empty might not | |
| 623 // yet be added to the free list and it is not straightforward to | |
| 624 // know which list they are on so that we can remove them. Note | |
| 625 // that we only need to do this if we need to allocate more than | |
| 626 // one region to satisfy the current humongous allocation | |
| 627 // request. If we are only allocating one region we use the common | |
| 628 // region allocation code (see above). | |
| 629 wait_while_free_regions_coming(); | |
| 2361 | 630 append_secondary_free_list_if_not_empty_with_lock(); |
| 2152 | 631 |
| 632 if (free_regions() >= num_regions) { | |
| 3766 | 633 first = _hrs.find_contiguous(num_regions); |
| 634 if (first != G1_NULL_HRS_INDEX) { | |
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635 for (uint i = first; i < first + num_regions; ++i) { |
| 3766 | 636 HeapRegion* hr = region_at(i); |
| 2152 | 637 assert(hr->is_empty(), "sanity"); |
| 2361 | 638 assert(is_on_master_free_list(hr), "sanity"); |
| 2152 | 639 hr->set_pending_removal(true); |
| 640 } | |
| 641 _free_list.remove_all_pending(num_regions); | |
| 642 } | |
| 643 } | |
| 644 } | |
| 645 return first; | |
| 646 } | |
| 647 | |
| 2361 | 648 HeapWord* |
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649 G1CollectedHeap::humongous_obj_allocate_initialize_regions(uint first, |
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650 uint num_regions, |
| 2361 | 651 size_t word_size) { |
| 3766 | 652 assert(first != G1_NULL_HRS_INDEX, "pre-condition"); |
| 2361 | 653 assert(isHumongous(word_size), "word_size should be humongous"); |
| 654 assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); | |
| 655 | |
| 656 // Index of last region in the series + 1. | |
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657 uint last = first + num_regions; |
| 2361 | 658 |
| 659 // We need to initialize the region(s) we just discovered. This is | |
| 660 // a bit tricky given that it can happen concurrently with | |
| 661 // refinement threads refining cards on these regions and | |
| 662 // potentially wanting to refine the BOT as they are scanning | |
| 663 // those cards (this can happen shortly after a cleanup; see CR | |
| 664 // 6991377). So we have to set up the region(s) carefully and in | |
| 665 // a specific order. | |
| 666 | |
| 667 // The word size sum of all the regions we will allocate. | |
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668 size_t word_size_sum = (size_t) num_regions * HeapRegion::GrainWords; |
| 2361 | 669 assert(word_size <= word_size_sum, "sanity"); |
| 670 | |
| 671 // This will be the "starts humongous" region. | |
| 3766 | 672 HeapRegion* first_hr = region_at(first); |
| 2361 | 673 // The header of the new object will be placed at the bottom of |
| 674 // the first region. | |
| 675 HeapWord* new_obj = first_hr->bottom(); | |
| 676 // This will be the new end of the first region in the series that | |
| 10405 | 677 // should also match the end of the last region in the series. |
| 2361 | 678 HeapWord* new_end = new_obj + word_size_sum; |
| 679 // This will be the new top of the first region that will reflect | |
| 680 // this allocation. | |
| 681 HeapWord* new_top = new_obj + word_size; | |
| 682 | |
| 683 // First, we need to zero the header of the space that we will be | |
| 684 // allocating. When we update top further down, some refinement | |
| 685 // threads might try to scan the region. By zeroing the header we | |
| 686 // ensure that any thread that will try to scan the region will | |
| 687 // come across the zero klass word and bail out. | |
| 688 // | |
| 689 // NOTE: It would not have been correct to have used | |
| 690 // CollectedHeap::fill_with_object() and make the space look like | |
| 691 // an int array. The thread that is doing the allocation will | |
| 692 // later update the object header to a potentially different array | |
| 693 // type and, for a very short period of time, the klass and length | |
| 694 // fields will be inconsistent. This could cause a refinement | |
| 695 // thread to calculate the object size incorrectly. | |
| 696 Copy::fill_to_words(new_obj, oopDesc::header_size(), 0); | |
| 697 | |
| 698 // We will set up the first region as "starts humongous". This | |
| 699 // will also update the BOT covering all the regions to reflect | |
| 700 // that there is a single object that starts at the bottom of the | |
| 701 // first region. | |
| 702 first_hr->set_startsHumongous(new_top, new_end); | |
| 703 | |
| 704 // Then, if there are any, we will set up the "continues | |
| 705 // humongous" regions. | |
| 706 HeapRegion* hr = NULL; | |
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707 for (uint i = first + 1; i < last; ++i) { |
| 3766 | 708 hr = region_at(i); |
| 2361 | 709 hr->set_continuesHumongous(first_hr); |
| 710 } | |
| 711 // If we have "continues humongous" regions (hr != NULL), then the | |
| 712 // end of the last one should match new_end. | |
| 713 assert(hr == NULL || hr->end() == new_end, "sanity"); | |
| 714 | |
| 715 // Up to this point no concurrent thread would have been able to | |
| 716 // do any scanning on any region in this series. All the top | |
| 717 // fields still point to bottom, so the intersection between | |
| 718 // [bottom,top] and [card_start,card_end] will be empty. Before we | |
| 719 // update the top fields, we'll do a storestore to make sure that | |
| 720 // no thread sees the update to top before the zeroing of the | |
| 721 // object header and the BOT initialization. | |
| 722 OrderAccess::storestore(); | |
| 723 | |
| 724 // Now that the BOT and the object header have been initialized, | |
| 725 // we can update top of the "starts humongous" region. | |
| 726 assert(first_hr->bottom() < new_top && new_top <= first_hr->end(), | |
| 727 "new_top should be in this region"); | |
| 728 first_hr->set_top(new_top); | |
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729 if (_hr_printer.is_active()) { |
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730 HeapWord* bottom = first_hr->bottom(); |
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731 HeapWord* end = first_hr->orig_end(); |
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732 if ((first + 1) == last) { |
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733 // the series has a single humongous region |
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734 _hr_printer.alloc(G1HRPrinter::SingleHumongous, first_hr, new_top); |
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735 } else { |
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736 // the series has more than one humongous regions |
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737 _hr_printer.alloc(G1HRPrinter::StartsHumongous, first_hr, end); |
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738 } |
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739 } |
| 2361 | 740 |
| 741 // Now, we will update the top fields of the "continues humongous" | |
| 742 // regions. The reason we need to do this is that, otherwise, | |
| 743 // these regions would look empty and this will confuse parts of | |
| 744 // G1. For example, the code that looks for a consecutive number | |
| 745 // of empty regions will consider them empty and try to | |
| 746 // re-allocate them. We can extend is_empty() to also include | |
| 747 // !continuesHumongous(), but it is easier to just update the top | |
| 748 // fields here. The way we set top for all regions (i.e., top == | |
| 749 // end for all regions but the last one, top == new_top for the | |
| 750 // last one) is actually used when we will free up the humongous | |
| 751 // region in free_humongous_region(). | |
| 752 hr = NULL; | |
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753 for (uint i = first + 1; i < last; ++i) { |
| 3766 | 754 hr = region_at(i); |
| 2361 | 755 if ((i + 1) == last) { |
| 756 // last continues humongous region | |
| 757 assert(hr->bottom() < new_top && new_top <= hr->end(), | |
| 758 "new_top should fall on this region"); | |
| 759 hr->set_top(new_top); | |
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760 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, new_top); |
| 2361 | 761 } else { |
| 762 // not last one | |
| 763 assert(new_top > hr->end(), "new_top should be above this region"); | |
| 764 hr->set_top(hr->end()); | |
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765 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, hr->end()); |
| 2361 | 766 } |
| 767 } | |
| 768 // If we have continues humongous regions (hr != NULL), then the | |
| 769 // end of the last one should match new_end and its top should | |
| 770 // match new_top. | |
| 771 assert(hr == NULL || | |
| 772 (hr->end() == new_end && hr->top() == new_top), "sanity"); | |
| 773 | |
| 774 assert(first_hr->used() == word_size * HeapWordSize, "invariant"); | |
| 775 _summary_bytes_used += first_hr->used(); | |
| 776 _humongous_set.add(first_hr); | |
| 777 | |
| 778 return new_obj; | |
| 779 } | |
| 780 | |
| 342 | 781 // If could fit into free regions w/o expansion, try. |
| 782 // Otherwise, if can expand, do so. | |
| 783 // Otherwise, if using ex regions might help, try with ex given back. | |
| 1973 | 784 HeapWord* G1CollectedHeap::humongous_obj_allocate(size_t word_size) { |
| 2152 | 785 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
| 786 | |
| 787 verify_region_sets_optional(); | |
| 342 | 788 |
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789 size_t word_size_rounded = round_to(word_size, HeapRegion::GrainWords); |
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790 uint num_regions = (uint) (word_size_rounded / HeapRegion::GrainWords); |
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791 uint x_num = expansion_regions(); |
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792 uint fs = _hrs.free_suffix(); |
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793 uint first = humongous_obj_allocate_find_first(num_regions, word_size); |
| 3766 | 794 if (first == G1_NULL_HRS_INDEX) { |
| 2152 | 795 // The only thing we can do now is attempt expansion. |
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796 if (fs + x_num >= num_regions) { |
|
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797 // If the number of regions we're trying to allocate for this |
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798 // object is at most the number of regions in the free suffix, |
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799 // then the call to humongous_obj_allocate_find_first() above |
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800 // should have succeeded and we wouldn't be here. |
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801 // |
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802 // We should only be trying to expand when the free suffix is |
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803 // not sufficient for the object _and_ we have some expansion |
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804 // room available. |
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805 assert(num_regions > fs, "earlier allocation should have succeeded"); |
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806 |
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807 ergo_verbose1(ErgoHeapSizing, |
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808 "attempt heap expansion", |
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809 ergo_format_reason("humongous allocation request failed") |
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810 ergo_format_byte("allocation request"), |
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811 word_size * HeapWordSize); |
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812 if (expand((num_regions - fs) * HeapRegion::GrainBytes)) { |
| 3766 | 813 // Even though the heap was expanded, it might not have |
| 814 // reached the desired size. So, we cannot assume that the | |
| 815 // allocation will succeed. | |
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816 first = humongous_obj_allocate_find_first(num_regions, word_size); |
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817 } |
| 2152 | 818 } |
| 819 } | |
| 820 | |
| 2361 | 821 HeapWord* result = NULL; |
| 3766 | 822 if (first != G1_NULL_HRS_INDEX) { |
| 2361 | 823 result = |
| 824 humongous_obj_allocate_initialize_regions(first, num_regions, word_size); | |
| 825 assert(result != NULL, "it should always return a valid result"); | |
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826 |
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827 // A successful humongous object allocation changes the used space |
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828 // information of the old generation so we need to recalculate the |
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829 // sizes and update the jstat counters here. |
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830 g1mm()->update_sizes(); |
| 2152 | 831 } |
| 832 | |
| 833 verify_region_sets_optional(); | |
| 2361 | 834 |
| 835 return result; | |
| 342 | 836 } |
| 837 | |
| 1973 | 838 HeapWord* G1CollectedHeap::allocate_new_tlab(size_t word_size) { |
| 839 assert_heap_not_locked_and_not_at_safepoint(); | |
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840 assert(!isHumongous(word_size), "we do not allow humongous TLABs"); |
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841 |
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842 unsigned int dummy_gc_count_before; |
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843 int dummy_gclocker_retry_count = 0; |
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844 return attempt_allocation(word_size, &dummy_gc_count_before, &dummy_gclocker_retry_count); |
| 342 | 845 } |
| 846 | |
| 847 HeapWord* | |
| 848 G1CollectedHeap::mem_allocate(size_t word_size, | |
| 1973 | 849 bool* gc_overhead_limit_was_exceeded) { |
| 850 assert_heap_not_locked_and_not_at_safepoint(); | |
| 342 | 851 |
| 10405 | 852 // Loop until the allocation is satisfied, or unsatisfied after GC. |
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853 for (int try_count = 1, gclocker_retry_count = 0; /* we'll return */; try_count += 1) { |
| 1973 | 854 unsigned int gc_count_before; |
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855 |
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856 HeapWord* result = NULL; |
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857 if (!isHumongous(word_size)) { |
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858 result = attempt_allocation(word_size, &gc_count_before, &gclocker_retry_count); |
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859 } else { |
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860 result = attempt_allocation_humongous(word_size, &gc_count_before, &gclocker_retry_count); |
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861 } |
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862 if (result != NULL) { |
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863 return result; |
| 342 | 864 } |
| 865 | |
| 866 // Create the garbage collection operation... | |
| 1973 | 867 VM_G1CollectForAllocation op(gc_count_before, word_size); |
| 342 | 868 // ...and get the VM thread to execute it. |
| 869 VMThread::execute(&op); | |
| 1973 | 870 |
| 871 if (op.prologue_succeeded() && op.pause_succeeded()) { | |
| 872 // If the operation was successful we'll return the result even | |
| 873 // if it is NULL. If the allocation attempt failed immediately | |
| 874 // after a Full GC, it's unlikely we'll be able to allocate now. | |
| 875 HeapWord* result = op.result(); | |
| 876 if (result != NULL && !isHumongous(word_size)) { | |
| 877 // Allocations that take place on VM operations do not do any | |
| 878 // card dirtying and we have to do it here. We only have to do | |
| 879 // this for non-humongous allocations, though. | |
| 880 dirty_young_block(result, word_size); | |
| 881 } | |
| 342 | 882 return result; |
| 1973 | 883 } else { |
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884 if (gclocker_retry_count > GCLockerRetryAllocationCount) { |
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885 return NULL; |
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886 } |
| 1973 | 887 assert(op.result() == NULL, |
| 888 "the result should be NULL if the VM op did not succeed"); | |
| 342 | 889 } |
| 890 | |
| 891 // Give a warning if we seem to be looping forever. | |
| 892 if ((QueuedAllocationWarningCount > 0) && | |
| 893 (try_count % QueuedAllocationWarningCount == 0)) { | |
| 1973 | 894 warning("G1CollectedHeap::mem_allocate retries %d times", try_count); |
| 342 | 895 } |
| 896 } | |
| 1973 | 897 |
| 898 ShouldNotReachHere(); | |
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899 return NULL; |
| 342 | 900 } |
| 901 | |
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902 HeapWord* G1CollectedHeap::attempt_allocation_slow(size_t word_size, |
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903 unsigned int *gc_count_before_ret, |
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904 int* gclocker_retry_count_ret) { |
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905 // Make sure you read the note in attempt_allocation_humongous(). |
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906 |
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907 assert_heap_not_locked_and_not_at_safepoint(); |
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908 assert(!isHumongous(word_size), "attempt_allocation_slow() should not " |
|
abdfc822206f
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|
909 "be called for humongous allocation requests"); |
|
abdfc822206f
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|
910 |
|
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|
911 // We should only get here after the first-level allocation attempt |
|
abdfc822206f
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|
912 // (attempt_allocation()) failed to allocate. |
|
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|
913 |
|
abdfc822206f
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changeset
|
914 // We will loop until a) we manage to successfully perform the |
|
abdfc822206f
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|
915 // allocation or b) we successfully schedule a collection which |
|
abdfc822206f
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|
916 // fails to perform the allocation. b) is the only case when we'll |
|
abdfc822206f
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|
917 // return NULL. |
|
abdfc822206f
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|
918 HeapWord* result = NULL; |
|
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|
919 for (int try_count = 1; /* we'll return */; try_count += 1) { |
|
abdfc822206f
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|
920 bool should_try_gc; |
|
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|
921 unsigned int gc_count_before; |
|
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|
922 |
|
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|
923 { |
|
abdfc822206f
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|
924 MutexLockerEx x(Heap_lock); |
|
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|
925 |
|
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|
926 result = _mutator_alloc_region.attempt_allocation_locked(word_size, |
|
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|
927 false /* bot_updates */); |
|
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|
928 if (result != NULL) { |
|
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|
929 return result; |
|
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|
930 } |
|
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|
931 |
|
abdfc822206f
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|
932 // If we reach here, attempt_allocation_locked() above failed to |
|
abdfc822206f
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|
933 // allocate a new region. So the mutator alloc region should be NULL. |
|
abdfc822206f
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|
934 assert(_mutator_alloc_region.get() == NULL, "only way to get here"); |
|
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|
935 |
|
abdfc822206f
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|
936 if (GC_locker::is_active_and_needs_gc()) { |
|
abdfc822206f
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|
937 if (g1_policy()->can_expand_young_list()) { |
|
3914
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
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3886
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|
938 // No need for an ergo verbose message here, |
|
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
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|
939 // can_expand_young_list() does this when it returns true. |
|
2433
abdfc822206f
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|
940 result = _mutator_alloc_region.attempt_allocation_force(word_size, |
|
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|
941 false /* bot_updates */); |
|
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|
942 if (result != NULL) { |
|
abdfc822206f
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|
943 return result; |
|
abdfc822206f
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parents:
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|
944 } |
|
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|
945 } |
|
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|
946 should_try_gc = false; |
|
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|
947 } else { |
|
6106
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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|
948 // The GCLocker may not be active but the GCLocker initiated |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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|
949 // GC may not yet have been performed (GCLocker::needs_gc() |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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|
950 // returns true). In this case we do not try this GC and |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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|
951 // wait until the GCLocker initiated GC is performed, and |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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|
952 // then retry the allocation. |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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|
953 if (GC_locker::needs_gc()) { |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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changeset
|
954 should_try_gc = false; |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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|
955 } else { |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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changeset
|
956 // Read the GC count while still holding the Heap_lock. |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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|
957 gc_count_before = total_collections(); |
|
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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 should_try_gc = true; |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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|
959 } |
|
2433
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|
960 } |
|
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|
961 } |
|
abdfc822206f
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|
962 |
|
abdfc822206f
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|
963 if (should_try_gc) { |
|
abdfc822206f
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|
964 bool succeeded; |
|
12113
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
12082
diff
changeset
|
965 result = do_collection_pause(word_size, gc_count_before, &succeeded, |
|
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
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parents:
12082
diff
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|
966 GCCause::_g1_inc_collection_pause); |
|
2433
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|
967 if (result != NULL) { |
|
abdfc822206f
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parents:
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|
968 assert(succeeded, "only way to get back a non-NULL result"); |
|
abdfc822206f
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|
969 return result; |
|
abdfc822206f
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parents:
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diff
changeset
|
970 } |
|
abdfc822206f
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parents:
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diff
changeset
|
971 |
|
abdfc822206f
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diff
changeset
|
972 if (succeeded) { |
|
abdfc822206f
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diff
changeset
|
973 // If we get here we successfully scheduled a collection which |
|
abdfc822206f
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|
974 // failed to allocate. No point in trying to allocate |
|
abdfc822206f
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diff
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|
975 // further. We'll just return NULL. |
|
abdfc822206f
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parents:
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changeset
|
976 MutexLockerEx x(Heap_lock); |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
977 *gc_count_before_ret = total_collections(); |
|
2433
abdfc822206f
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|
978 return NULL; |
|
abdfc822206f
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tonyp
parents:
2432
diff
changeset
|
979 } |
|
abdfc822206f
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parents:
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diff
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|
980 } else { |
|
8853
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
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diff
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|
981 if (*gclocker_retry_count_ret > GCLockerRetryAllocationCount) { |
|
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
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8038
diff
changeset
|
982 MutexLockerEx x(Heap_lock); |
|
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
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diff
changeset
|
983 *gc_count_before_ret = total_collections(); |
|
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
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|
984 return NULL; |
|
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
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diff
changeset
|
985 } |
|
6106
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
changeset
|
986 // The GCLocker is either active or the GCLocker initiated |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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parents:
6064
diff
changeset
|
987 // GC has not yet been performed. Stall until it is and |
|
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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|
988 // then retry the allocation. |
|
2433
abdfc822206f
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|
989 GC_locker::stall_until_clear(); |
|
8853
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|
990 (*gclocker_retry_count_ret) += 1; |
|
2433
abdfc822206f
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|
991 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
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diff
changeset
|
992 |
| 10405 | 993 // We can reach here if we were unsuccessful in scheduling a |
|
2433
abdfc822206f
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tonyp
parents:
2432
diff
changeset
|
994 // collection (because another thread beat us to it) or if we were |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
995 // stalled due to the GC locker. In either can we should retry the |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
2432
diff
changeset
|
996 // allocation attempt in case another thread successfully |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
2432
diff
changeset
|
997 // performed a collection and reclaimed enough space. We do the |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
998 // first attempt (without holding the Heap_lock) here and the |
|
abdfc822206f
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diff
changeset
|
999 // follow-on attempt will be at the start of the next loop |
|
abdfc822206f
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tonyp
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diff
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|
1000 // iteration (after taking the Heap_lock). |
|
abdfc822206f
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tonyp
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diff
changeset
|
1001 result = _mutator_alloc_region.attempt_allocation(word_size, |
|
abdfc822206f
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tonyp
parents:
2432
diff
changeset
|
1002 false /* bot_updates */); |
|
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
1003 if (result != NULL) { |
|
2433
abdfc822206f
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tonyp
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|
1004 return result; |
|
abdfc822206f
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parents:
2432
diff
changeset
|
1005 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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diff
changeset
|
1006 |
|
abdfc822206f
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tonyp
parents:
2432
diff
changeset
|
1007 // Give a warning if we seem to be looping forever. |
|
abdfc822206f
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tonyp
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diff
changeset
|
1008 if ((QueuedAllocationWarningCount > 0) && |
|
abdfc822206f
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diff
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|
1009 (try_count % QueuedAllocationWarningCount == 0)) { |
|
abdfc822206f
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diff
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|
1010 warning("G1CollectedHeap::attempt_allocation_slow() " |
|
abdfc822206f
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|
1011 "retries %d times", try_count); |
|
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2432
diff
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|
1012 } |
|
abdfc822206f
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diff
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|
1013 } |
|
abdfc822206f
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diff
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|
1014 |
|
abdfc822206f
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parents:
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diff
changeset
|
1015 ShouldNotReachHere(); |
|
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diff
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|
1016 return NULL; |
|
abdfc822206f
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2432
diff
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|
1017 } |
|
abdfc822206f
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|
1018 |
|
abdfc822206f
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parents:
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diff
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|
1019 HeapWord* G1CollectedHeap::attempt_allocation_humongous(size_t word_size, |
|
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|
1020 unsigned int * gc_count_before_ret, |
|
2e093b564241
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|
1021 int* gclocker_retry_count_ret) { |
|
2433
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|
1022 // The structure of this method has a lot of similarities to |
|
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diff
changeset
|
1023 // attempt_allocation_slow(). The reason these two were not merged |
|
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2432
diff
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|
1024 // into a single one is that such a method would require several "if |
|
abdfc822206f
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|
1025 // allocation is not humongous do this, otherwise do that" |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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diff
changeset
|
1026 // conditional paths which would obscure its flow. In fact, an early |
|
abdfc822206f
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diff
changeset
|
1027 // version of this code did use a unified method which was harder to |
|
abdfc822206f
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parents:
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diff
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|
1028 // follow and, as a result, it had subtle bugs that were hard to |
|
abdfc822206f
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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 |
|
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1037 // Humongous objects can exhaust the heap quickly, so we should check if we |
|
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|
1038 // need to start a marking cycle at each humongous object allocation. We do |
|
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1039 // the check before we do the actual allocation. The reason for doing it |
|
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1040 // before the allocation is that we avoid having to keep track of the newly |
|
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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)) { |
|
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1044 collect(GCCause::_g1_humongous_allocation); |
|
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1045 } |
|
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1046 |
|
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1047 // We will loop until a) we manage to successfully perform the |
|
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1048 // allocation or b) we successfully schedule a collection which |
|
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1049 // fails to perform the allocation. b) is the only case when we'll |
|
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1050 // return NULL. |
|
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1051 HeapWord* result = NULL; |
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1052 for (int try_count = 1; /* we'll return */; try_count += 1) { |
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1053 bool should_try_gc; |
|
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1054 unsigned int gc_count_before; |
|
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1055 |
|
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1056 { |
|
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1057 MutexLockerEx x(Heap_lock); |
|
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1058 |
|
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1059 // Given that humongous objects are not allocated in young |
|
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1060 // regions, we'll first try to do the allocation without doing a |
|
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1061 // collection hoping that there's enough space in the heap. |
|
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1062 result = humongous_obj_allocate(word_size); |
|
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1063 if (result != NULL) { |
|
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|
1064 return result; |
|
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1065 } |
|
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1066 |
|
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1067 if (GC_locker::is_active_and_needs_gc()) { |
|
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1068 should_try_gc = false; |
|
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1069 } else { |
|
6106
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1070 // The GCLocker may not be active but the GCLocker initiated |
|
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1071 // GC may not yet have been performed (GCLocker::needs_gc() |
|
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1072 // returns true). In this case we do not try this GC and |
|
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1073 // wait until the GCLocker initiated GC is performed, and |
|
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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; |
|
12113
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|
1091 result = do_collection_pause(word_size, gc_count_before, &succeeded, |
|
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|
1092 GCCause::_g1_humongous_allocation); |
|
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1093 if (result != NULL) { |
|
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|
1094 assert(succeeded, "only way to get back a non-NULL result"); |
|
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|
1095 return result; |
|
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|
1096 } |
|
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|
1097 |
|
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|
1098 if (succeeded) { |
|
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|
1099 // If we get here we successfully scheduled a collection which |
|
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1100 // failed to allocate. No point in trying to allocate |
|
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1101 // further. We'll just return NULL. |
|
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|
1102 MutexLockerEx x(Heap_lock); |
|
4910
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1103 *gc_count_before_ret = total_collections(); |
|
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|
1104 return NULL; |
|
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|
1105 } |
|
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|
1106 } else { |
|
8853
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|
1107 if (*gclocker_retry_count_ret > GCLockerRetryAllocationCount) { |
|
2e093b564241
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|
1108 MutexLockerEx x(Heap_lock); |
|
2e093b564241
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|
1109 *gc_count_before_ret = total_collections(); |
|
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|
1110 return NULL; |
|
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|
1111 } |
|
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1112 // The GCLocker is either active or the GCLocker initiated |
|
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1113 // GC has not yet been performed. Stall until it is and |
|
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1114 // then retry the allocation. |
|
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1115 GC_locker::stall_until_clear(); |
|
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1116 (*gclocker_retry_count_ret) += 1; |
|
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1117 } |
|
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|
1118 |
| 10405 | 1119 // We can reach here if we were unsuccessful in scheduling a |
|
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1120 // collection (because another thread beat us to it) or if we were |
|
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1121 // stalled due to the GC locker. In either can we should retry the |
|
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|
1122 // allocation attempt in case another thread successfully |
|
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1123 // performed a collection and reclaimed enough space. Give a |
|
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|
1124 // warning if we seem to be looping forever. |
|
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|
1125 |
|
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1126 if ((QueuedAllocationWarningCount > 0) && |
|
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1127 (try_count % QueuedAllocationWarningCount == 0)) { |
|
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1128 warning("G1CollectedHeap::attempt_allocation_humongous() " |
|
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1129 "retries %d times", try_count); |
|
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|
1130 } |
|
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|
1131 } |
|
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|
1132 |
|
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|
1133 ShouldNotReachHere(); |
|
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|
1134 return NULL; |
|
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|
1135 } |
|
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|
1136 |
|
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|
1137 HeapWord* G1CollectedHeap::attempt_allocation_at_safepoint(size_t word_size, |
|
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|
1138 bool expect_null_mutator_alloc_region) { |
| 2152 | 1139 assert_at_safepoint(true /* should_be_vm_thread */); |
|
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1140 assert(_mutator_alloc_region.get() == NULL || |
|
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|
1141 !expect_null_mutator_alloc_region, |
|
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1142 "the current alloc region was unexpectedly found to be non-NULL"); |
|
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1143 |
|
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|
1144 if (!isHumongous(word_size)) { |
|
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1145 return _mutator_alloc_region.attempt_allocation_locked(word_size, |
|
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1146 false /* bot_updates */); |
|
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1147 } else { |
|
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1148 HeapWord* result = humongous_obj_allocate(word_size); |
|
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1149 if (result != NULL && g1_policy()->need_to_start_conc_mark("STW humongous allocation")) { |
|
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1150 g1_policy()->set_initiate_conc_mark_if_possible(); |
|
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1151 } |
|
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1152 return result; |
|
2433
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1153 } |
|
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1154 |
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1155 ShouldNotReachHere(); |
| 342 | 1156 } |
| 1157 | |
| 1158 class PostMCRemSetClearClosure: public HeapRegionClosure { | |
|
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1159 G1CollectedHeap* _g1h; |
| 342 | 1160 ModRefBarrierSet* _mr_bs; |
| 1161 public: | |
|
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1162 PostMCRemSetClearClosure(G1CollectedHeap* g1h, ModRefBarrierSet* mr_bs) : |
| 12080 | 1163 _g1h(g1h), _mr_bs(mr_bs) {} |
| 1164 | |
| 342 | 1165 bool doHeapRegion(HeapRegion* r) { |
| 12080 | 1166 HeapRegionRemSet* hrrs = r->rem_set(); |
| 1167 | |
|
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1168 if (r->continuesHumongous()) { |
| 12080 | 1169 // We'll assert that the strong code root list and RSet is empty |
| 1170 assert(hrrs->strong_code_roots_list_length() == 0, "sanity"); | |
| 1171 assert(hrrs->occupied() == 0, "RSet should be empty"); | |
| 342 | 1172 return false; |
|
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1173 } |
| 12080 | 1174 |
|
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1175 _g1h->reset_gc_time_stamps(r); |
| 12080 | 1176 hrrs->clear(); |
| 342 | 1177 // You might think here that we could clear just the cards |
| 1178 // corresponding to the used region. But no: if we leave a dirty card | |
| 1179 // in a region we might allocate into, then it would prevent that card | |
| 1180 // from being enqueued, and cause it to be missed. | |
| 1181 // Re: the performance cost: we shouldn't be doing full GC anyway! | |
| 1182 _mr_bs->clear(MemRegion(r->bottom(), r->end())); | |
| 12080 | 1183 |
| 342 | 1184 return false; |
| 1185 } | |
| 1186 }; | |
| 1187 | |
|
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1188 void G1CollectedHeap::clear_rsets_post_compaction() { |
| 12343 | 1189 PostMCRemSetClearClosure rs_clear(this, g1_barrier_set()); |
|
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1190 heap_region_iterate(&rs_clear); |
|
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1191 } |
| 342 | 1192 |
|
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1193 class RebuildRSOutOfRegionClosure: public HeapRegionClosure { |
|
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1194 G1CollectedHeap* _g1h; |
|
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1195 UpdateRSOopClosure _cl; |
|
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1196 int _worker_i; |
|
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1197 public: |
|
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1198 RebuildRSOutOfRegionClosure(G1CollectedHeap* g1, int worker_i = 0) : |
| 1861 | 1199 _cl(g1->g1_rem_set(), worker_i), |
|
626
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1200 _worker_i(worker_i), |
|
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1201 _g1h(g1) |
|
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|
1202 { } |
|
1960
878b57474103
6978187: G1: assert(ParallelGCThreads> 1 || n_yielded() == _hrrs->occupied()) strikes again
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|
1203 |
|
626
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1204 bool doHeapRegion(HeapRegion* r) { |
|
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1205 if (!r->continuesHumongous()) { |
|
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1206 _cl.set_from(r); |
|
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1207 r->oop_iterate(&_cl); |
|
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1208 } |
|
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1209 return false; |
|
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1210 } |
|
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1211 }; |
|
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1212 |
|
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1213 class ParRebuildRSTask: public AbstractGangTask { |
|
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1214 G1CollectedHeap* _g1; |
|
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1215 public: |
|
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1216 ParRebuildRSTask(G1CollectedHeap* g1) |
|
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1217 : AbstractGangTask("ParRebuildRSTask"), |
|
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1218 _g1(g1) |
|
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1219 { } |
|
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1220 |
|
4728
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|
1221 void work(uint worker_id) { |
|
441e946dc1af
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1222 RebuildRSOutOfRegionClosure rebuild_rs(_g1, worker_id); |
|
441e946dc1af
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|
1223 _g1->heap_region_par_iterate_chunked(&rebuild_rs, worker_id, |
|
4095
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|
1224 _g1->workers()->active_workers(), |
|
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1225 HeapRegion::RebuildRSClaimValue); |
|
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|
1226 } |
|
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|
1227 }; |
|
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|
1228 |
|
3778
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|
1229 class PostCompactionPrinterClosure: public HeapRegionClosure { |
|
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1230 private: |
|
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|
1231 G1HRPrinter* _hr_printer; |
|
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1232 public: |
|
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|
1233 bool doHeapRegion(HeapRegion* hr) { |
|
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|
1234 assert(!hr->is_young(), "not expecting to find young regions"); |
|
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|
1235 // We only generate output for non-empty regions. |
|
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1236 if (!hr->is_empty()) { |
|
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|
1237 if (!hr->isHumongous()) { |
|
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|
1238 _hr_printer->post_compaction(hr, G1HRPrinter::Old); |
|
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|
1239 } else if (hr->startsHumongous()) { |
|
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1240 if (hr->region_num() == 1) { |
|
3778
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|
1241 // single humongous region |
|
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|
1242 _hr_printer->post_compaction(hr, G1HRPrinter::SingleHumongous); |
|
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|
1243 } else { |
|
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|
1244 _hr_printer->post_compaction(hr, G1HRPrinter::StartsHumongous); |
|
5f6f2615433a
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|
1245 } |
|
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|
1246 } else { |
|
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|
1247 assert(hr->continuesHumongous(), "only way to get here"); |
|
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|
1248 _hr_printer->post_compaction(hr, G1HRPrinter::ContinuesHumongous); |
|
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|
1249 } |
|
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|
1250 } |
|
5f6f2615433a
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|
1251 return false; |
|
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|
1252 } |
|
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|
1253 |
|
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|
1254 PostCompactionPrinterClosure(G1HRPrinter* hr_printer) |
|
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|
1255 : _hr_printer(hr_printer) { } |
|
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|
1256 }; |
|
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|
1257 |
|
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|
1258 void G1CollectedHeap::print_hrs_post_compaction() { |
|
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|
1259 PostCompactionPrinterClosure cl(hr_printer()); |
|
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|
1260 heap_region_iterate(&cl); |
|
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|
1261 } |
|
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|
1262 |
| 1973 | 1263 bool G1CollectedHeap::do_collection(bool explicit_gc, |
|
1656
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|
1264 bool clear_all_soft_refs, |
| 342 | 1265 size_t word_size) { |
| 2152 | 1266 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1267 | |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
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|
1268 if (GC_locker::check_active_before_gc()) { |
| 1973 | 1269 return false; |
|
1359
23b1b27ac76c
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|
1270 } |
|
23b1b27ac76c
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|
1271 |
| 10405 | 1272 STWGCTimer* gc_timer = G1MarkSweep::gc_timer(); |
|
13400
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|
1273 gc_timer->register_gc_start(); |
| 10405 | 1274 |
| 1275 SerialOldTracer* gc_tracer = G1MarkSweep::gc_tracer(); | |
| 1276 gc_tracer->report_gc_start(gc_cause(), gc_timer->gc_start()); | |
| 1277 | |
|
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
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|
1278 SvcGCMarker sgcm(SvcGCMarker::FULL); |
| 342 | 1279 ResourceMark rm; |
| 1280 | |
|
4872
aa3d708d67c4
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|
1281 print_heap_before_gc(); |
| 10405 | 1282 trace_heap_before_gc(gc_tracer); |
|
838
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6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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|
1283 |
|
17866
270d7cb38f40
8038934: Remove prefix allocated_ from methods and variables in Metaspace
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|
1284 size_t metadata_prev_used = MetaspaceAux::used_bytes(); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
1285 |
| 2152 | 1286 verify_region_sets_optional(); |
| 342 | 1287 |
|
1387
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|
1288 const bool do_clear_all_soft_refs = clear_all_soft_refs || |
|
0bfd3fb24150
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|
1289 collector_policy()->should_clear_all_soft_refs(); |
|
0bfd3fb24150
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|
1290 |
|
0bfd3fb24150
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|
1291 ClearedAllSoftRefs casr(do_clear_all_soft_refs, collector_policy()); |
|
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|
1292 |
| 342 | 1293 { |
| 1294 IsGCActiveMark x; | |
| 1295 | |
| 1296 // Timing | |
| 6030 | 1297 assert(gc_cause() != GCCause::_java_lang_system_gc || explicit_gc, "invariant"); |
|
6007
5c86f8211d1e
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|
1298 gclog_or_tty->date_stamp(G1Log::fine() && PrintGCDateStamps); |
|
5c86f8211d1e
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|
1299 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
| 6030 | 1300 |
| 342 | 1301 { |
|
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
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changeset
|
1302 GCTraceTime t(GCCauseString("Full GC", gc_cause()), G1Log::fine(), true, NULL, gc_tracer->gc_id()); |
|
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1303 TraceCollectorStats tcs(g1mm()->full_collection_counters()); |
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1304 TraceMemoryManagerStats tms(true /* fullGC */, gc_cause()); |
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1305 |
|
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|
1306 double start = os::elapsedTime(); |
|
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1307 g1_policy()->record_full_collection_start(); |
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1308 |
|
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1309 // Note: When we have a more flexible GC logging framework that |
|
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1310 // allows us to add optional attributes to a GC log record we |
|
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1311 // could consider timing and reporting how long we wait in the |
|
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1312 // following two methods. |
|
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|
1313 wait_while_free_regions_coming(); |
|
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1314 // If we start the compaction before the CM threads finish |
|
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1315 // scanning the root regions we might trip them over as we'll |
|
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1316 // be moving objects / updating references. So let's wait until |
|
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1317 // they are done. By telling them to abort, they should complete |
|
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1318 // early. |
|
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|
1319 _cm->root_regions()->abort(); |
|
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1320 _cm->root_regions()->wait_until_scan_finished(); |
|
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1321 append_secondary_free_list_if_not_empty_with_lock(); |
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1322 |
|
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|
1323 gc_prologue(true); |
|
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1324 increment_total_collections(true /* full gc */); |
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1325 increment_old_marking_cycles_started(); |
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|
1326 |
|
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1327 assert(used() == recalculate_used(), "Should be equal"); |
|
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1328 |
|
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|
1329 verify_before_gc(); |
|
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1330 |
| 10405 | 1331 pre_full_gc_dump(gc_timer); |
|
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1332 |
|
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1333 COMPILER2_PRESENT(DerivedPointerTable::clear()); |
|
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1334 |
|
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1335 // Disable discovery and empty the discovered lists |
|
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1336 // for the CM ref processor. |
|
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|
1337 ref_processor_cm()->disable_discovery(); |
|
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1338 ref_processor_cm()->abandon_partial_discovery(); |
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1339 ref_processor_cm()->verify_no_references_recorded(); |
|
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1340 |
|
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1341 // Abandon current iterations of concurrent marking and concurrent |
|
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1342 // refinement, if any are in progress. We have to do this before |
|
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1343 // wait_until_scan_finished() below. |
|
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|
1344 concurrent_mark()->abort(); |
|
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1345 |
|
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1346 // Make sure we'll choose a new allocation region afterwards. |
|
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|
1347 release_mutator_alloc_region(); |
|
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1348 abandon_gc_alloc_regions(); |
|
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1349 g1_rem_set()->cleanupHRRS(); |
|
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1350 |
|
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1351 // We should call this after we retire any currently active alloc |
|
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1352 // regions so that all the ALLOC / RETIRE events are generated |
|
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1353 // before the start GC event. |
|
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1354 _hr_printer.start_gc(true /* full */, (size_t) total_collections()); |
|
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1355 |
|
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1356 // We may have added regions to the current incremental collection |
|
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1357 // set between the last GC or pause and now. We need to clear the |
|
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1358 // incremental collection set and then start rebuilding it afresh |
|
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1359 // after this full GC. |
|
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1360 abandon_collection_set(g1_policy()->inc_cset_head()); |
|
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1361 g1_policy()->clear_incremental_cset(); |
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|
1362 g1_policy()->stop_incremental_cset_building(); |
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1363 |
|
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1364 tear_down_region_sets(false /* free_list_only */); |
|
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1365 g1_policy()->set_gcs_are_young(true); |
|
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1366 |
|
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1367 // See the comments in g1CollectedHeap.hpp and |
|
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1368 // G1CollectedHeap::ref_processing_init() about |
|
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1369 // how reference processing currently works in G1. |
|
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|
1370 |
|
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1371 // Temporarily make discovery by the STW ref processor single threaded (non-MT). |
|
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|
1372 ReferenceProcessorMTDiscoveryMutator stw_rp_disc_ser(ref_processor_stw(), false); |
|
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|
1373 |
|
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1374 // Temporarily clear the STW ref processor's _is_alive_non_header field. |
|
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1375 ReferenceProcessorIsAliveMutator stw_rp_is_alive_null(ref_processor_stw(), NULL); |
|
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1376 |
|
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1377 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, true /*verify_no_refs*/); |
|
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1378 ref_processor_stw()->setup_policy(do_clear_all_soft_refs); |
|
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|
1379 |
|
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|
1380 // Do collection work |
|
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|
1381 { |
|
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|
1382 HandleMark hm; // Discard invalid handles created during gc |
|
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|
1383 G1MarkSweep::invoke_at_safepoint(ref_processor_stw(), do_clear_all_soft_refs); |
|
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|
1384 } |
|
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|
1385 |
|
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1386 assert(free_regions() == 0, "we should not have added any free regions"); |
|
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|
1387 rebuild_region_sets(false /* free_list_only */); |
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|
1388 |
|
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1389 // Enqueue any discovered reference objects that have |
|
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1390 // not been removed from the discovered lists. |
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|
1391 ref_processor_stw()->enqueue_discovered_references(); |
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1392 |
|
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|
1393 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
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1394 |
|
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|
1395 MemoryService::track_memory_usage(); |
|
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1396 |
|
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1397 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
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1398 ref_processor_stw()->verify_no_references_recorded(); |
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|
1399 |
|
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1400 // Delete metaspaces for unloaded class loaders and clean up loader_data graph |
|
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|
1401 ClassLoaderDataGraph::purge(); |
| 12080 | 1402 MetaspaceAux::verify_metrics(); |
|
10098
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1403 |
|
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1404 // Note: since we've just done a full GC, concurrent |
|
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1405 // marking is no longer active. Therefore we need not |
|
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1406 // re-enable reference discovery for the CM ref processor. |
|
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1407 // That will be done at the start of the next marking cycle. |
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1408 assert(!ref_processor_cm()->discovery_enabled(), "Postcondition"); |
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1409 ref_processor_cm()->verify_no_references_recorded(); |
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1410 |
|
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|
1411 reset_gc_time_stamp(); |
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1412 // Since everything potentially moved, we will clear all remembered |
| 10405 | 1413 // sets, and clear all cards. Later we will rebuild remembered |
|
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1414 // sets. We will also reset the GC time stamps of the regions. |
|
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|
1415 clear_rsets_post_compaction(); |
|
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|
1416 check_gc_time_stamps(); |
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1417 |
|
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1418 // Resize the heap if necessary. |
|
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1419 resize_if_necessary_after_full_collection(explicit_gc ? 0 : word_size); |
|
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|
1420 |
|
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|
1421 if (_hr_printer.is_active()) { |
|
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|
1422 // We should do this after we potentially resize the heap so |
|
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1423 // that all the COMMIT / UNCOMMIT events are generated before |
|
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|
1424 // the end GC event. |
|
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|
1425 |
|
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|
1426 print_hrs_post_compaction(); |
|
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|
1427 _hr_printer.end_gc(true /* full */, (size_t) total_collections()); |
|
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|
1428 } |
|
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|
1429 |
|
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|
1430 G1HotCardCache* hot_card_cache = _cg1r->hot_card_cache(); |
|
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|
1431 if (hot_card_cache->use_cache()) { |
|
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|
1432 hot_card_cache->reset_card_counts(); |
|
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|
1433 hot_card_cache->reset_hot_cache(); |
|
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|
1434 } |
|
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|
1435 |
|
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|
1436 // Rebuild remembered sets of all regions. |
|
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|
1437 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
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|
1438 uint n_workers = |
|
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|
1439 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
|
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|
1440 workers()->active_workers(), |
|
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|
1441 Threads::number_of_non_daemon_threads()); |
|
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|
1442 assert(UseDynamicNumberOfGCThreads || |
|
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|
1443 n_workers == workers()->total_workers(), |
|
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|
1444 "If not dynamic should be using all the workers"); |
|
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|
1445 workers()->set_active_workers(n_workers); |
|
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|
1446 // Set parallel threads in the heap (_n_par_threads) only |
|
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|
1447 // before a parallel phase and always reset it to 0 after |
|
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|
1448 // the phase so that the number of parallel threads does |
|
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|
1449 // no get carried forward to a serial phase where there |
|
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|
1450 // may be code that is "possibly_parallel". |
|
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|
1451 set_par_threads(n_workers); |
|
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|
1452 |
|
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|
1453 ParRebuildRSTask rebuild_rs_task(this); |
|
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|
1454 assert(check_heap_region_claim_values( |
|
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|
1455 HeapRegion::InitialClaimValue), "sanity check"); |
|
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|
1456 assert(UseDynamicNumberOfGCThreads || |
|
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|
1457 workers()->active_workers() == workers()->total_workers(), |
|
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|
1458 "Unless dynamic should use total workers"); |
|
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|
1459 // Use the most recent number of active workers |
|
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|
1460 assert(workers()->active_workers() > 0, |
|
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|
1461 "Active workers not properly set"); |
|
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|
1462 set_par_threads(workers()->active_workers()); |
|
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|
1463 workers()->run_task(&rebuild_rs_task); |
|
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|
1464 set_par_threads(0); |
|
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|
1465 assert(check_heap_region_claim_values( |
|
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|
1466 HeapRegion::RebuildRSClaimValue), "sanity check"); |
|
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|
1467 reset_heap_region_claim_values(); |
|
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|
1468 } else { |
|
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|
1469 RebuildRSOutOfRegionClosure rebuild_rs(this); |
|
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|
1470 heap_region_iterate(&rebuild_rs); |
|
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|
1471 } |
|
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|
1472 |
| 12080 | 1473 // Rebuild the strong code root lists for each region |
| 1474 rebuild_strong_code_roots(); | |
| 1475 | |
|
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|
1476 if (true) { // FIXME |
|
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|
1477 MetaspaceGC::compute_new_size(); |
|
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|
1478 } |
| 342 | 1479 |
|
546
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|
1480 #ifdef TRACESPINNING |
|
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|
1481 ParallelTaskTerminator::print_termination_counts(); |
|
546
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diff
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|
1482 #endif |
|
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diff
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|
1483 |
|
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|
1484 // Discard all rset updates |
|
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|
1485 JavaThread::dirty_card_queue_set().abandon_logs(); |
|
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|
1486 assert(!G1DeferredRSUpdate |
|
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|
1487 || (G1DeferredRSUpdate && |
|
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|
1488 (dirty_card_queue_set().completed_buffers_num() == 0)), "Should not be any"); |
|
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|
1489 |
|
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|
1490 _young_list->reset_sampled_info(); |
|
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|
1491 // At this point there should be no regions in the |
|
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|
1492 // entire heap tagged as young. |
|
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|
1493 assert(check_young_list_empty(true /* check_heap */), |
|
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|
1494 "young list should be empty at this point"); |
|
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|
1495 |
|
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|
1496 // Update the number of full collections that have been completed. |
|
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|
1497 increment_old_marking_cycles_completed(false /* concurrent */); |
|
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|
1498 |
|
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|
1499 _hrs.verify_optional(); |
|
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|
1500 verify_region_sets_optional(); |
|
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|
1501 |
|
10373
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|
1502 verify_after_gc(); |
|
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|
1503 |
|
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|
1504 // Start a new incremental collection set for the next pause |
|
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|
1505 assert(g1_policy()->collection_set() == NULL, "must be"); |
|
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|
1506 g1_policy()->start_incremental_cset_building(); |
|
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|
1507 |
|
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|
1508 clear_cset_fast_test(); |
|
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|
1509 |
|
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|
1510 init_mutator_alloc_region(); |
|
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|
1511 |
|
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|
1512 double end = os::elapsedTime(); |
|
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|
1513 g1_policy()->record_full_collection_end(); |
|
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|
1514 |
|
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|
1515 if (G1Log::fine()) { |
|
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|
1516 g1_policy()->print_heap_transition(); |
|
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|
1517 } |
|
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|
1518 |
|
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|
1519 // We must call G1MonitoringSupport::update_sizes() in the same scoping level |
|
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|
1520 // as an active TraceMemoryManagerStats object (i.e. before the destructor for the |
|
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|
1521 // TraceMemoryManagerStats is called) so that the G1 memory pools are updated |
|
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|
1522 // before any GC notifications are raised. |
|
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|
1523 g1mm()->update_sizes(); |
|
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|
1524 |
|
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|
1525 gc_epilogue(true); |
|
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|
1526 } |
|
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|
1527 |
|
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|
1528 if (G1Log::finer()) { |
|
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|
1529 g1_policy()->print_detailed_heap_transition(true /* full */); |
|
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|
1530 } |
|
6121
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|
1531 |
|
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|
1532 print_heap_after_gc(); |
| 10405 | 1533 trace_heap_after_gc(gc_tracer); |
| 1534 | |
| 1535 post_full_gc_dump(gc_timer); | |
| 1536 | |
|
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|
1537 gc_timer->register_gc_end(); |
| 10405 | 1538 gc_tracer->report_gc_end(gc_timer->gc_end(), gc_timer->time_partitions()); |
|
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|
1539 } |
| 1973 | 1540 |
| 1541 return true; | |
| 342 | 1542 } |
| 1543 | |
| 1544 void G1CollectedHeap::do_full_collection(bool clear_all_soft_refs) { | |
| 1973 | 1545 // do_collection() will return whether it succeeded in performing |
| 1546 // the GC. Currently, there is no facility on the | |
| 1547 // do_full_collection() API to notify the caller than the collection | |
| 1548 // did not succeed (e.g., because it was locked out by the GC | |
| 1549 // locker). So, right now, we'll ignore the return value. | |
| 1550 bool dummy = do_collection(true, /* explicit_gc */ | |
| 1551 clear_all_soft_refs, | |
| 1552 0 /* word_size */); | |
| 342 | 1553 } |
| 1554 | |
| 1555 // This code is mostly copied from TenuredGeneration. | |
| 1556 void | |
| 1557 G1CollectedHeap:: | |
| 1558 resize_if_necessary_after_full_collection(size_t word_size) { | |
| 1559 // Include the current allocation, if any, and bytes that will be | |
| 1560 // pre-allocated to support collections, as "used". | |
| 1561 const size_t used_after_gc = used(); | |
| 1562 const size_t capacity_after_gc = capacity(); | |
| 1563 const size_t free_after_gc = capacity_after_gc - used_after_gc; | |
| 1564 | |
|
1717
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|
1565 // This is enforced in arguments.cpp. |
|
688c3755d7af
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|
1566 assert(MinHeapFreeRatio <= MaxHeapFreeRatio, |
|
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1567 "otherwise the code below doesn't make sense"); |
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1568 |
| 342 | 1569 // We don't have floating point command-line arguments |
|
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1570 const double minimum_free_percentage = (double) MinHeapFreeRatio / 100.0; |
| 342 | 1571 const double maximum_used_percentage = 1.0 - minimum_free_percentage; |
|
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1572 const double maximum_free_percentage = (double) MaxHeapFreeRatio / 100.0; |
| 342 | 1573 const double minimum_used_percentage = 1.0 - maximum_free_percentage; |
| 1574 | |
|
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1575 const size_t min_heap_size = collector_policy()->min_heap_byte_size(); |
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1576 const size_t max_heap_size = collector_policy()->max_heap_byte_size(); |
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1577 |
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1578 // We have to be careful here as these two calculations can overflow |
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1579 // 32-bit size_t's. |
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1580 double used_after_gc_d = (double) used_after_gc; |
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1581 double minimum_desired_capacity_d = used_after_gc_d / maximum_used_percentage; |
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1582 double maximum_desired_capacity_d = used_after_gc_d / minimum_used_percentage; |
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1583 |
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1584 // Let's make sure that they are both under the max heap size, which |
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1585 // by default will make them fit into a size_t. |
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1586 double desired_capacity_upper_bound = (double) max_heap_size; |
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1587 minimum_desired_capacity_d = MIN2(minimum_desired_capacity_d, |
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1588 desired_capacity_upper_bound); |
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1589 maximum_desired_capacity_d = MIN2(maximum_desired_capacity_d, |
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1590 desired_capacity_upper_bound); |
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1591 |
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1592 // We can now safely turn them into size_t's. |
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1593 size_t minimum_desired_capacity = (size_t) minimum_desired_capacity_d; |
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1594 size_t maximum_desired_capacity = (size_t) maximum_desired_capacity_d; |
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1595 |
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1596 // This assert only makes sense here, before we adjust them |
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1597 // with respect to the min and max heap size. |
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1598 assert(minimum_desired_capacity <= maximum_desired_capacity, |
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1599 err_msg("minimum_desired_capacity = "SIZE_FORMAT", " |
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1600 "maximum_desired_capacity = "SIZE_FORMAT, |
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1601 minimum_desired_capacity, maximum_desired_capacity)); |
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1602 |
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1603 // Should not be greater than the heap max size. No need to adjust |
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1604 // it with respect to the heap min size as it's a lower bound (i.e., |
|
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1605 // we'll try to make the capacity larger than it, not smaller). |
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1606 minimum_desired_capacity = MIN2(minimum_desired_capacity, max_heap_size); |
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1607 // Should not be less than the heap min size. No need to adjust it |
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1608 // with respect to the heap max size as it's an upper bound (i.e., |
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1609 // we'll try to make the capacity smaller than it, not greater). |
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1610 maximum_desired_capacity = MAX2(maximum_desired_capacity, min_heap_size); |
| 342 | 1611 |
|
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1612 if (capacity_after_gc < minimum_desired_capacity) { |
| 342 | 1613 // Don't expand unless it's significant |
| 1614 size_t expand_bytes = minimum_desired_capacity - capacity_after_gc; | |
|
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1615 ergo_verbose4(ErgoHeapSizing, |
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1616 "attempt heap expansion", |
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1617 ergo_format_reason("capacity lower than " |
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1618 "min desired capacity after Full GC") |
|
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1619 ergo_format_byte("capacity") |
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1620 ergo_format_byte("occupancy") |
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1621 ergo_format_byte_perc("min desired capacity"), |
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1622 capacity_after_gc, used_after_gc, |
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1623 minimum_desired_capacity, (double) MinHeapFreeRatio); |
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1624 expand(expand_bytes); |
| 342 | 1625 |
| 1626 // No expansion, now see if we want to shrink | |
|
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1627 } else if (capacity_after_gc > maximum_desired_capacity) { |
| 342 | 1628 // Capacity too large, compute shrinking size |
| 1629 size_t shrink_bytes = capacity_after_gc - maximum_desired_capacity; | |
|
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1630 ergo_verbose4(ErgoHeapSizing, |
|
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1631 "attempt heap shrinking", |
|
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1632 ergo_format_reason("capacity higher than " |
|
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1633 "max desired capacity after Full GC") |
|
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|
1634 ergo_format_byte("capacity") |
|
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|
1635 ergo_format_byte("occupancy") |
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|
1636 ergo_format_byte_perc("max desired capacity"), |
|
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1637 capacity_after_gc, used_after_gc, |
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|
1638 maximum_desired_capacity, (double) MaxHeapFreeRatio); |
| 342 | 1639 shrink(shrink_bytes); |
| 1640 } | |
| 1641 } | |
| 1642 | |
| 1643 | |
| 1644 HeapWord* | |
| 1973 | 1645 G1CollectedHeap::satisfy_failed_allocation(size_t word_size, |
| 1646 bool* succeeded) { | |
| 2152 | 1647 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1973 | 1648 |
| 1649 *succeeded = true; | |
| 1650 // Let's attempt the allocation first. | |
|
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1651 HeapWord* result = |
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1652 attempt_allocation_at_safepoint(word_size, |
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1653 false /* expect_null_mutator_alloc_region */); |
| 1973 | 1654 if (result != NULL) { |
| 1655 assert(*succeeded, "sanity"); | |
| 1656 return result; | |
| 1657 } | |
| 342 | 1658 |
| 1659 // In a G1 heap, we're supposed to keep allocation from failing by | |
| 1660 // incremental pauses. Therefore, at least for now, we'll favor | |
| 1661 // expansion over collection. (This might change in the future if we can | |
| 1662 // do something smarter than full collection to satisfy a failed alloc.) | |
| 1663 result = expand_and_allocate(word_size); | |
| 1664 if (result != NULL) { | |
| 1973 | 1665 assert(*succeeded, "sanity"); |
| 342 | 1666 return result; |
| 1667 } | |
| 1668 | |
| 1973 | 1669 // Expansion didn't work, we'll try to do a Full GC. |
| 1670 bool gc_succeeded = do_collection(false, /* explicit_gc */ | |
| 1671 false, /* clear_all_soft_refs */ | |
| 1672 word_size); | |
| 1673 if (!gc_succeeded) { | |
| 1674 *succeeded = false; | |
| 1675 return NULL; | |
| 1676 } | |
| 1677 | |
| 1678 // Retry the allocation | |
| 1679 result = attempt_allocation_at_safepoint(word_size, | |
|
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1680 true /* expect_null_mutator_alloc_region */); |
| 342 | 1681 if (result != NULL) { |
| 1973 | 1682 assert(*succeeded, "sanity"); |
| 342 | 1683 return result; |
| 1684 } | |
| 1685 | |
| 1973 | 1686 // Then, try a Full GC that will collect all soft references. |
| 1687 gc_succeeded = do_collection(false, /* explicit_gc */ | |
| 1688 true, /* clear_all_soft_refs */ | |
| 1689 word_size); | |
| 1690 if (!gc_succeeded) { | |
| 1691 *succeeded = false; | |
| 1692 return NULL; | |
| 1693 } | |
| 1694 | |
| 1695 // Retry the allocation once more | |
| 1696 result = attempt_allocation_at_safepoint(word_size, | |
|
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|
1697 true /* expect_null_mutator_alloc_region */); |
| 342 | 1698 if (result != NULL) { |
| 1973 | 1699 assert(*succeeded, "sanity"); |
| 342 | 1700 return result; |
| 1701 } | |
| 1702 | |
|
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1703 assert(!collector_policy()->should_clear_all_soft_refs(), |
| 1973 | 1704 "Flag should have been handled and cleared prior to this point"); |
|
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1705 |
| 342 | 1706 // What else? We might try synchronous finalization later. If the total |
| 1707 // space available is large enough for the allocation, then a more | |
| 1708 // complete compaction phase than we've tried so far might be | |
| 1709 // appropriate. | |
| 1973 | 1710 assert(*succeeded, "sanity"); |
| 342 | 1711 return NULL; |
| 1712 } | |
| 1713 | |
| 1714 // Attempting to expand the heap sufficiently | |
| 1715 // to support an allocation of the given "word_size". If | |
| 1716 // successful, perform the allocation and return the address of the | |
| 1717 // allocated block, or else "NULL". | |
| 1718 | |
| 1719 HeapWord* G1CollectedHeap::expand_and_allocate(size_t word_size) { | |
| 2152 | 1720 assert_at_safepoint(true /* should_be_vm_thread */); |
| 1721 | |
| 1722 verify_region_sets_optional(); | |
| 1973 | 1723 |
|
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1724 size_t expand_bytes = MAX2(word_size * HeapWordSize, MinHeapDeltaBytes); |
|
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1725 ergo_verbose1(ErgoHeapSizing, |
|
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1726 "attempt heap expansion", |
|
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1727 ergo_format_reason("allocation request failed") |
|
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1728 ergo_format_byte("allocation request"), |
|
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1729 word_size * HeapWordSize); |
|
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1730 if (expand(expand_bytes)) { |
| 3766 | 1731 _hrs.verify_optional(); |
|
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1732 verify_region_sets_optional(); |
|
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1733 return attempt_allocation_at_safepoint(word_size, |
|
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1734 false /* expect_null_mutator_alloc_region */); |
|
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1735 } |
|
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1736 return NULL; |
| 342 | 1737 } |
| 1738 | |
| 3766 | 1739 void G1CollectedHeap::update_committed_space(HeapWord* old_end, |
| 1740 HeapWord* new_end) { | |
| 1741 assert(old_end != new_end, "don't call this otherwise"); | |
| 1742 assert((HeapWord*) _g1_storage.high() == new_end, "invariant"); | |
| 1743 | |
| 1744 // Update the committed mem region. | |
| 1745 _g1_committed.set_end(new_end); | |
| 1746 // Tell the card table about the update. | |
| 1747 Universe::heap()->barrier_set()->resize_covered_region(_g1_committed); | |
| 1748 // Tell the BOT about the update. | |
| 1749 _bot_shared->resize(_g1_committed.word_size()); | |
|
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1750 // Tell the hot card cache about the update |
|
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1751 _cg1r->hot_card_cache()->resize_card_counts(capacity()); |
| 3766 | 1752 } |
| 1753 | |
|
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1754 bool G1CollectedHeap::expand(size_t expand_bytes) { |
|
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1755 size_t aligned_expand_bytes = ReservedSpace::page_align_size_up(expand_bytes); |
| 342 | 1756 aligned_expand_bytes = align_size_up(aligned_expand_bytes, |
| 1757 HeapRegion::GrainBytes); | |
|
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1758 ergo_verbose2(ErgoHeapSizing, |
|
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1759 "expand the heap", |
|
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1760 ergo_format_byte("requested expansion amount") |
|
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1761 ergo_format_byte("attempted expansion amount"), |
|
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1762 expand_bytes, aligned_expand_bytes); |
|
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1763 |
|
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1764 if (_g1_storage.uncommitted_size() == 0) { |
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1765 ergo_verbose0(ErgoHeapSizing, |
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1766 "did not expand the heap", |
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1767 ergo_format_reason("heap already fully expanded")); |
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1768 return false; |
|
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1769 } |
|
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1770 |
| 3766 | 1771 // First commit the memory. |
| 1772 HeapWord* old_end = (HeapWord*) _g1_storage.high(); | |
|
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1773 bool successful = _g1_storage.expand_by(aligned_expand_bytes); |
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1774 if (successful) { |
| 3766 | 1775 // Then propagate this update to the necessary data structures. |
| 1776 HeapWord* new_end = (HeapWord*) _g1_storage.high(); | |
| 1777 update_committed_space(old_end, new_end); | |
| 1778 | |
| 1779 FreeRegionList expansion_list("Local Expansion List"); | |
| 1780 MemRegion mr = _hrs.expand_by(old_end, new_end, &expansion_list); | |
| 1781 assert(mr.start() == old_end, "post-condition"); | |
| 1782 // mr might be a smaller region than what was requested if | |
| 1783 // expand_by() was unable to allocate the HeapRegion instances | |
| 1784 assert(mr.end() <= new_end, "post-condition"); | |
| 1785 | |
| 1786 size_t actual_expand_bytes = mr.byte_size(); | |
| 1787 assert(actual_expand_bytes <= aligned_expand_bytes, "post-condition"); | |
| 1788 assert(actual_expand_bytes == expansion_list.total_capacity_bytes(), | |
| 1789 "post-condition"); | |
| 1790 if (actual_expand_bytes < aligned_expand_bytes) { | |
| 1791 // We could not expand _hrs to the desired size. In this case we | |
| 1792 // need to shrink the committed space accordingly. | |
| 1793 assert(mr.end() < new_end, "invariant"); | |
| 1794 | |
| 1795 size_t diff_bytes = aligned_expand_bytes - actual_expand_bytes; | |
| 1796 // First uncommit the memory. | |
| 1797 _g1_storage.shrink_by(diff_bytes); | |
| 1798 // Then propagate this update to the necessary data structures. | |
| 1799 update_committed_space(new_end, mr.end()); | |
|
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1800 } |
| 3766 | 1801 _free_list.add_as_tail(&expansion_list); |
|
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1802 |
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1803 if (_hr_printer.is_active()) { |
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1804 HeapWord* curr = mr.start(); |
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1805 while (curr < mr.end()) { |
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1806 HeapWord* curr_end = curr + HeapRegion::GrainWords; |
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1807 _hr_printer.commit(curr, curr_end); |
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1808 curr = curr_end; |
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1809 } |
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1810 assert(curr == mr.end(), "post-condition"); |
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1811 } |
|
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1812 g1_policy()->record_new_heap_size(n_regions()); |
|
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1813 } else { |
|
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1814 ergo_verbose0(ErgoHeapSizing, |
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1815 "did not expand the heap", |
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1816 ergo_format_reason("heap expansion operation failed")); |
|
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1817 // The expansion of the virtual storage space was unsuccessful. |
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1818 // Let's see if it was because we ran out of swap. |
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1819 if (G1ExitOnExpansionFailure && |
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1820 _g1_storage.uncommitted_size() >= aligned_expand_bytes) { |
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1821 // We had head room... |
|
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1822 vm_exit_out_of_memory(aligned_expand_bytes, OOM_MMAP_ERROR, "G1 heap expansion"); |
| 342 | 1823 } |
| 1824 } | |
|
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1825 return successful; |
| 342 | 1826 } |
| 1827 | |
| 3766 | 1828 void G1CollectedHeap::shrink_helper(size_t shrink_bytes) { |
| 342 | 1829 size_t aligned_shrink_bytes = |
| 1830 ReservedSpace::page_align_size_down(shrink_bytes); | |
| 1831 aligned_shrink_bytes = align_size_down(aligned_shrink_bytes, | |
| 1832 HeapRegion::GrainBytes); | |
|
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1833 uint num_regions_to_remove = (uint)(shrink_bytes / HeapRegion::GrainBytes); |
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1834 |
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1835 uint num_regions_removed = _hrs.shrink_by(num_regions_to_remove); |
| 3766 | 1836 HeapWord* old_end = (HeapWord*) _g1_storage.high(); |
|
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1837 size_t shrunk_bytes = num_regions_removed * HeapRegion::GrainBytes; |
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1838 |
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1839 ergo_verbose3(ErgoHeapSizing, |
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1840 "shrink the heap", |
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1841 ergo_format_byte("requested shrinking amount") |
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1842 ergo_format_byte("aligned shrinking amount") |
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1843 ergo_format_byte("attempted shrinking amount"), |
|
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1844 shrink_bytes, aligned_shrink_bytes, shrunk_bytes); |
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1845 if (num_regions_removed > 0) { |
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1846 _g1_storage.shrink_by(shrunk_bytes); |
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1847 HeapWord* new_end = (HeapWord*) _g1_storage.high(); |
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1848 |
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1849 if (_hr_printer.is_active()) { |
|
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1850 HeapWord* curr = old_end; |
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1851 while (curr > new_end) { |
|
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1852 HeapWord* curr_end = curr; |
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1853 curr -= HeapRegion::GrainWords; |
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1854 _hr_printer.uncommit(curr, curr_end); |
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1855 } |
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1856 } |
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1857 |
|
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1858 _expansion_regions += num_regions_removed; |
| 3766 | 1859 update_committed_space(old_end, new_end); |
| 1860 HeapRegionRemSet::shrink_heap(n_regions()); | |
|
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1861 g1_policy()->record_new_heap_size(n_regions()); |
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1862 } else { |
|
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1863 ergo_verbose0(ErgoHeapSizing, |
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1864 "did not shrink the heap", |
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1865 ergo_format_reason("heap shrinking operation failed")); |
| 342 | 1866 } |
| 1867 } | |
| 1868 | |
| 1869 void G1CollectedHeap::shrink(size_t shrink_bytes) { | |
| 2152 | 1870 verify_region_sets_optional(); |
| 1871 | |
|
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1872 // We should only reach here at the end of a Full GC which means we |
|
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1873 // should not not be holding to any GC alloc regions. The method |
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1874 // below will make sure of that and do any remaining clean up. |
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1875 abandon_gc_alloc_regions(); |
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1876 |
| 2152 | 1877 // Instead of tearing down / rebuilding the free lists here, we |
| 1878 // could instead use the remove_all_pending() method on free_list to | |
| 1879 // remove only the ones that we need to remove. | |
| 4072 | 1880 tear_down_region_sets(true /* free_list_only */); |
| 342 | 1881 shrink_helper(shrink_bytes); |
| 4072 | 1882 rebuild_region_sets(true /* free_list_only */); |
| 2152 | 1883 |
| 3766 | 1884 _hrs.verify_optional(); |
| 2152 | 1885 verify_region_sets_optional(); |
| 342 | 1886 } |
| 1887 | |
| 1888 // Public methods. | |
| 1889 | |
| 1890 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away | |
| 1891 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list | |
| 1892 #endif // _MSC_VER | |
| 1893 | |
| 1894 | |
| 1895 G1CollectedHeap::G1CollectedHeap(G1CollectorPolicy* policy_) : | |
| 1896 SharedHeap(policy_), | |
| 1897 _g1_policy(policy_), | |
| 1111 | 1898 _dirty_card_queue_set(false), |
| 1705 | 1899 _into_cset_dirty_card_queue_set(false), |
|
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1900 _is_alive_closure_cm(this), |
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1901 _is_alive_closure_stw(this), |
|
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1902 _ref_processor_cm(NULL), |
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1903 _ref_processor_stw(NULL), |
| 342 | 1904 _process_strong_tasks(new SubTasksDone(G1H_PS_NumElements)), |
| 1905 _bot_shared(NULL), | |
| 10405 | 1906 _evac_failure_scan_stack(NULL), |
| 342 | 1907 _mark_in_progress(false), |
| 2152 | 1908 _cg1r(NULL), _summary_bytes_used(0), |
|
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1909 _g1mm(NULL), |
| 342 | 1910 _refine_cte_cl(NULL), |
| 1911 _full_collection(false), | |
|
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1912 _free_list("Master Free List", new MasterFreeRegionListMtSafeChecker()), |
|
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1913 _secondary_free_list("Secondary Free List", new SecondaryFreeRegionListMtSafeChecker()), |
|
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1914 _old_set("Old Set", false /* humongous */, new OldRegionSetMtSafeChecker()), |
|
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1915 _humongous_set("Master Humongous Set", true /* humongous */, new HumongousRegionSetMtSafeChecker()), |
| 2152 | 1916 _free_regions_coming(false), |
| 342 | 1917 _young_list(new YoungList(this)), |
| 1918 _gc_time_stamp(0), | |
|
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1919 _retained_old_gc_alloc_region(NULL), |
| 6595 | 1920 _survivor_plab_stats(YoungPLABSize, PLABWeight), |
| 1921 _old_plab_stats(OldPLABSize, PLABWeight), | |
|
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1922 _expand_heap_after_alloc_failure(true), |
| 526 | 1923 _surviving_young_words(NULL), |
|
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1924 _old_marking_cycles_started(0), |
|
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1925 _old_marking_cycles_completed(0), |
| 10405 | 1926 _concurrent_cycle_started(false), |
|
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1927 _in_cset_fast_test(), |
|
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1928 _dirty_cards_region_list(NULL), |
|
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1929 _worker_cset_start_region(NULL), |
| 10405 | 1930 _worker_cset_start_region_time_stamp(NULL), |
| 1931 _gc_timer_stw(new (ResourceObj::C_HEAP, mtGC) STWGCTimer()), | |
| 1932 _gc_timer_cm(new (ResourceObj::C_HEAP, mtGC) ConcurrentGCTimer()), | |
| 1933 _gc_tracer_stw(new (ResourceObj::C_HEAP, mtGC) G1NewTracer()), | |
| 1934 _gc_tracer_cm(new (ResourceObj::C_HEAP, mtGC) G1OldTracer()) { | |
| 1935 | |
| 1936 _g1h = this; | |
| 342 | 1937 if (_process_strong_tasks == NULL || !_process_strong_tasks->valid()) { |
| 1938 vm_exit_during_initialization("Failed necessary allocation."); | |
| 1939 } | |
|
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1940 |
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1941 _humongous_object_threshold_in_words = HeapRegion::GrainWords / 2; |
|
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1942 |
| 342 | 1943 int n_queues = MAX2((int)ParallelGCThreads, 1); |
| 1944 _task_queues = new RefToScanQueueSet(n_queues); | |
| 1945 | |
|
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1946 uint n_rem_sets = HeapRegionRemSet::num_par_rem_sets(); |
| 342 | 1947 assert(n_rem_sets > 0, "Invariant."); |
| 1948 | |
| 6197 | 1949 _worker_cset_start_region = NEW_C_HEAP_ARRAY(HeapRegion*, n_queues, mtGC); |
| 1950 _worker_cset_start_region_time_stamp = NEW_C_HEAP_ARRAY(unsigned int, n_queues, mtGC); | |
| 10405 | 1951 _evacuation_failed_info_array = NEW_C_HEAP_ARRAY(EvacuationFailedInfo, n_queues, mtGC); |
|
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1952 |
| 342 | 1953 for (int i = 0; i < n_queues; i++) { |
| 1954 RefToScanQueue* q = new RefToScanQueue(); | |
| 1955 q->initialize(); | |
| 1956 _task_queues->register_queue(i, q); | |
| 10405 | 1957 ::new (&_evacuation_failed_info_array[i]) EvacuationFailedInfo(); |
| 1958 } | |
|
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1959 clear_cset_start_regions(); |
|
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1960 |
|
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1961 // Initialize the G1EvacuationFailureALot counters and flags. |
|
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1962 NOT_PRODUCT(reset_evacuation_should_fail();) |
|
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1963 |
| 342 | 1964 guarantee(_task_queues != NULL, "task_queues allocation failure."); |
| 1965 } | |
| 1966 | |
| 1967 jint G1CollectedHeap::initialize() { | |
| 1166 | 1968 CollectedHeap::pre_initialize(); |
| 342 | 1969 os::enable_vtime(); |
| 1970 | |
|
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1971 G1Log::init(); |
|
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1972 |
| 342 | 1973 // Necessary to satisfy locking discipline assertions. |
| 1974 | |
| 1975 MutexLocker x(Heap_lock); | |
| 1976 | |
|
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1977 // We have to initialize the printer before committing the heap, as |
|
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1978 // it will be used then. |
|
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|
1979 _hr_printer.set_active(G1PrintHeapRegions); |
|
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|
1980 |
| 342 | 1981 // While there are no constraints in the GC code that HeapWordSize |
| 1982 // be any particular value, there are multiple other areas in the | |
| 1983 // system which believe this to be true (e.g. oop->object_size in some | |
| 1984 // cases incorrectly returns the size in wordSize units rather than | |
| 1985 // HeapWordSize). | |
| 1986 guarantee(HeapWordSize == wordSize, "HeapWordSize must equal wordSize"); | |
| 1987 | |
| 1988 size_t init_byte_size = collector_policy()->initial_heap_byte_size(); | |
| 1989 size_t max_byte_size = collector_policy()->max_heap_byte_size(); | |
|
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|
1990 size_t heap_alignment = collector_policy()->heap_alignment(); |
| 342 | 1991 |
| 1992 // Ensure that the sizes are properly aligned. | |
| 1993 Universe::check_alignment(init_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
| 1994 Universe::check_alignment(max_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
|
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|
1995 Universe::check_alignment(max_byte_size, heap_alignment, "g1 heap"); |
| 342 | 1996 |
|
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|
1997 _refine_cte_cl = new RefineCardTableEntryClosure(); |
|
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|
1998 |
|
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|
1999 _cg1r = new ConcurrentG1Refine(this, _refine_cte_cl); |
| 342 | 2000 |
| 2001 // Reserve the maximum. | |
|
642
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|
2002 |
|
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|
2003 // When compressed oops are enabled, the preferred heap base |
|
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2004 // is calculated by subtracting the requested size from the |
|
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|
2005 // 32Gb boundary and using the result as the base address for |
|
6aa4feb8a366
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|
2006 // heap reservation. If the requested size is not aligned to |
|
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|
2007 // HeapRegion::GrainBytes (i.e. the alignment that is passed |
|
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|
2008 // into the ReservedHeapSpace constructor) then the actual |
|
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2009 // base of the reserved heap may end up differing from the |
|
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|
2010 // address that was requested (i.e. the preferred heap base). |
|
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|
2011 // If this happens then we could end up using a non-optimal |
|
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|
2012 // compressed oops mode. |
|
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|
2013 |
|
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6964458: Reimplement class meta-data storage to use native memory
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|
2014 ReservedSpace heap_rs = Universe::reserve_heap(max_byte_size, |
|
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|
2015 heap_alignment); |
| 342 | 2016 |
| 2017 // It is important to do this in a way such that concurrent readers can't | |
| 10405 | 2018 // temporarily think something is in the heap. (I've actually seen this |
| 342 | 2019 // happen in asserts: DLD.) |
| 2020 _reserved.set_word_size(0); | |
| 2021 _reserved.set_start((HeapWord*)heap_rs.base()); | |
| 2022 _reserved.set_end((HeapWord*)(heap_rs.base() + heap_rs.size())); | |
| 2023 | |
|
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|
2024 _expansion_regions = (uint) (max_byte_size / HeapRegion::GrainBytes); |
| 342 | 2025 |
| 2026 // Create the gen rem set (and barrier set) for the entire reserved region. | |
| 2027 _rem_set = collector_policy()->create_rem_set(_reserved, 2); | |
| 2028 set_barrier_set(rem_set()->bs()); | |
| 12343 | 2029 if (!barrier_set()->is_a(BarrierSet::G1SATBCTLogging)) { |
| 2030 vm_exit_during_initialization("G1 requires a G1SATBLoggingCardTableModRefBS"); | |
| 342 | 2031 return JNI_ENOMEM; |
| 2032 } | |
| 2033 | |
| 2034 // Also create a G1 rem set. | |
| 12343 | 2035 _g1_rem_set = new G1RemSet(this, g1_barrier_set()); |
| 342 | 2036 |
| 2037 // Carve out the G1 part of the heap. | |
| 2038 | |
| 2039 ReservedSpace g1_rs = heap_rs.first_part(max_byte_size); | |
| 2040 _g1_reserved = MemRegion((HeapWord*)g1_rs.base(), | |
| 2041 g1_rs.size()/HeapWordSize); | |
| 2042 | |
| 2043 _g1_storage.initialize(g1_rs, 0); | |
| 2044 _g1_committed = MemRegion((HeapWord*)_g1_storage.low(), (size_t) 0); | |
| 3766 | 2045 _hrs.initialize((HeapWord*) _g1_reserved.start(), |
|
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2046 (HeapWord*) _g1_reserved.end()); |
|
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|
2047 assert(_hrs.max_length() == _expansion_regions, |
|
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|
2048 err_msg("max length: %u expansion regions: %u", |
|
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|
2049 _hrs.max_length(), _expansion_regions)); |
| 342 | 2050 |
|
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|
2051 // Do later initialization work for concurrent refinement. |
|
194f52aa2f23
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|
2052 _cg1r->init(); |
|
194f52aa2f23
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|
2053 |
|
807
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6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
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|
2054 // 6843694 - ensure that the maximum region index can fit |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
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|
2055 // in the remembered set structures. |
|
6010
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7157073: G1: type change size_t -> uint for region counts / indexes
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changeset
|
2056 const uint max_region_idx = (1U << (sizeof(RegionIdx_t)*BitsPerByte-1)) - 1; |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
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|
2057 guarantee((max_regions() - 1) <= max_region_idx, "too many regions"); |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
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796
diff
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|
2058 |
|
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
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diff
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|
2059 size_t max_cards_per_region = ((size_t)1 << (sizeof(CardIdx_t)*BitsPerByte-1)) - 1; |
|
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
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|
2060 guarantee(HeapRegion::CardsPerRegion > 0, "make sure it's initialized"); |
|
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
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3983
diff
changeset
|
2061 guarantee(HeapRegion::CardsPerRegion < max_cards_per_region, |
|
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
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|
2062 "too many cards per region"); |
|
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
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|
2063 |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
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|
2064 FreeRegionList::set_unrealistically_long_length(max_regions() + 1); |
| 2152 | 2065 |
| 342 | 2066 _bot_shared = new G1BlockOffsetSharedArray(_reserved, |
| 2067 heap_word_size(init_byte_size)); | |
| 2068 | |
| 2069 _g1h = this; | |
| 2070 | |
|
20212
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diff
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|
2071 _in_cset_fast_test.initialize(_g1_reserved.start(), _g1_reserved.end(), HeapRegion::GrainBytes); |
|
1394
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|
2072 |
| 342 | 2073 // Create the ConcurrentMark data structure and thread. |
| 2074 // (Must do this late, so that "max_regions" is defined.) | |
|
7397
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|
2075 _cm = new ConcurrentMark(this, heap_rs); |
|
442f942757c0
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|
2076 if (_cm == NULL || !_cm->completed_initialization()) { |
|
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
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|
2077 vm_shutdown_during_initialization("Could not create/initialize ConcurrentMark"); |
|
442f942757c0
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|
2078 return JNI_ENOMEM; |
|
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|
2079 } |
| 342 | 2080 _cmThread = _cm->cmThread(); |
| 2081 | |
| 2082 // Initialize the from_card cache structure of HeapRegionRemSet. | |
| 2083 HeapRegionRemSet::init_heap(max_regions()); | |
| 2084 | |
| 677 | 2085 // Now expand into the initial heap size. |
|
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6923430: G1: assert(res != 0,"This should have worked.")
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|
2086 if (!expand(init_byte_size)) { |
|
7397
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|
2087 vm_shutdown_during_initialization("Failed to allocate initial heap."); |
|
2188
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6923430: G1: assert(res != 0,"This should have worked.")
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|
2088 return JNI_ENOMEM; |
|
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
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|
2089 } |
| 342 | 2090 |
| 2091 // Perform any initialization actions delegated to the policy. | |
| 2092 g1_policy()->init(); | |
| 2093 | |
| 2094 JavaThread::satb_mark_queue_set().initialize(SATB_Q_CBL_mon, | |
| 2095 SATB_Q_FL_lock, | |
| 1111 | 2096 G1SATBProcessCompletedThreshold, |
| 342 | 2097 Shared_SATB_Q_lock); |
| 794 | 2098 |
|
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|
2099 JavaThread::dirty_card_queue_set().initialize(_refine_cte_cl, |
|
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|
2100 DirtyCardQ_CBL_mon, |
| 794 | 2101 DirtyCardQ_FL_lock, |
| 1111 | 2102 concurrent_g1_refine()->yellow_zone(), |
| 2103 concurrent_g1_refine()->red_zone(), | |
| 794 | 2104 Shared_DirtyCardQ_lock); |
| 2105 | |
|
616
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|
2106 if (G1DeferredRSUpdate) { |
|
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|
2107 dirty_card_queue_set().initialize(NULL, // Should never be called by the Java code |
|
570cb6369f17
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|
2108 DirtyCardQ_CBL_mon, |
|
616
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diff
changeset
|
2109 DirtyCardQ_FL_lock, |
| 1111 | 2110 -1, // never trigger processing |
| 2111 -1, // no limit on length | |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
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|
2112 Shared_DirtyCardQ_lock, |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
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diff
changeset
|
2113 &JavaThread::dirty_card_queue_set()); |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
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|
2114 } |
| 1705 | 2115 |
| 2116 // Initialize the card queue set used to hold cards containing | |
| 2117 // references into the collection set. | |
|
20216
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diff
changeset
|
2118 _into_cset_dirty_card_queue_set.initialize(NULL, // Should never be called by the Java code |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
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changeset
|
2119 DirtyCardQ_CBL_mon, |
| 1705 | 2120 DirtyCardQ_FL_lock, |
| 2121 -1, // never trigger processing | |
| 2122 -1, // no limit on length | |
| 2123 Shared_DirtyCardQ_lock, | |
| 2124 &JavaThread::dirty_card_queue_set()); | |
| 2125 | |
| 342 | 2126 // In case we're keeping closure specialization stats, initialize those |
| 2127 // counts and that mechanism. | |
| 2128 SpecializationStats::clear(); | |
| 2129 | |
|
2433
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7023069: G1: Introduce symmetric locking in the slow allocation path
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|
2130 // Here we allocate the dummy full region that is required by the |
|
abdfc822206f
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|
2131 // G1AllocRegion class. If we don't pass an address in the reserved |
|
abdfc822206f
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|
2132 // space here, lots of asserts fire. |
| 3766 | 2133 |
| 2134 HeapRegion* dummy_region = new_heap_region(0 /* index of bottom region */, | |
| 2135 _g1_reserved.start()); | |
|
2433
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|
2136 // We'll re-use the same region whether the alloc region will |
|
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|
2137 // require BOT updates or not and, if it doesn't, then a non-young |
|
abdfc822206f
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|
2138 // region will complain that it cannot support allocations without |
|
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|
2139 // BOT updates. So we'll tag the dummy region as young to avoid that. |
|
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|
2140 dummy_region->set_young(); |
|
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|
2141 // Make sure it's full. |
|
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|
2142 dummy_region->set_top(dummy_region->end()); |
|
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|
2143 G1AllocRegion::setup(this, dummy_region); |
|
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|
2144 |
|
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|
2145 init_mutator_alloc_region(); |
|
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|
2146 |
|
3289
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|
2147 // Do create of the monitoring and management support so that |
|
b52782ae3880
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|
2148 // values in the heap have been properly initialized. |
|
3980
8229bd737950
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|
2149 _g1mm = new G1MonitoringSupport(this); |
|
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|
2150 |
| 17764 | 2151 G1StringDedup::initialize(); |
| 2152 | |
| 342 | 2153 return JNI_OK; |
| 2154 } | |
| 2155 | |
|
17947
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|
2156 void G1CollectedHeap::stop() { |
| 17992 | 2157 // Stop all concurrent threads. We do this to make sure these threads |
| 2158 // do not continue to execute and access resources (e.g. gclog_or_tty) | |
|
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|
2159 // that are destroyed during shutdown. |
| 17992 | 2160 _cg1r->stop(); |
| 2161 _cmThread->stop(); | |
| 2162 if (G1StringDedup::is_enabled()) { | |
| 2163 G1StringDedup::stop(); | |
| 2164 } | |
|
17947
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|
2165 } |
|
1772223a25a2
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|
2166 |
|
12233
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|
2167 size_t G1CollectedHeap::conservative_max_heap_alignment() { |
|
40136aa2cdb1
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|
2168 return HeapRegion::max_region_size(); |
|
40136aa2cdb1
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|
2169 } |
|
40136aa2cdb1
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|
2170 |
| 342 | 2171 void G1CollectedHeap::ref_processing_init() { |
|
1974
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|
2172 // Reference processing in G1 currently works as follows: |
|
fd1d227ef1b9
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|
2173 // |
|
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|
2174 // * There are two reference processor instances. One is |
|
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|
2175 // used to record and process discovered references |
|
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|
2176 // during concurrent marking; the other is used to |
|
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|
2177 // record and process references during STW pauses |
|
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|
2178 // (both full and incremental). |
|
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|
2179 // * Both ref processors need to 'span' the entire heap as |
|
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|
2180 // the regions in the collection set may be dotted around. |
|
4dfb2df418f2
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|
2181 // |
|
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|
2182 // * For the concurrent marking ref processor: |
|
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|
2183 // * Reference discovery is enabled at initial marking. |
|
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|
2184 // * Reference discovery is disabled and the discovered |
|
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|
2185 // references processed etc during remarking. |
|
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|
2186 // * Reference discovery is MT (see below). |
|
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|
2187 // * Reference discovery requires a barrier (see below). |
|
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|
2188 // * Reference processing may or may not be MT |
|
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|
2189 // (depending on the value of ParallelRefProcEnabled |
|
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|
2190 // and ParallelGCThreads). |
|
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|
2191 // * A full GC disables reference discovery by the CM |
|
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|
2192 // ref processor and abandons any entries on it's |
|
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|
2193 // discovered lists. |
|
4dfb2df418f2
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|
2194 // |
|
4dfb2df418f2
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|
2195 // * For the STW processor: |
|
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|
2196 // * Non MT discovery is enabled at the start of a full GC. |
|
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|
2197 // * Processing and enqueueing during a full GC is non-MT. |
|
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|
2198 // * During a full GC, references are processed after marking. |
|
4dfb2df418f2
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|
2199 // |
|
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|
2200 // * Discovery (may or may not be MT) is enabled at the start |
|
4dfb2df418f2
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|
2201 // of an incremental evacuation pause. |
|
4dfb2df418f2
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|
2202 // * References are processed near the end of a STW evacuation pause. |
|
4dfb2df418f2
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|
2203 // * For both types of GC: |
|
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|
2204 // * Discovery is atomic - i.e. not concurrent. |
|
4dfb2df418f2
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changeset
|
2205 // * Reference discovery will not need a barrier. |
|
1974
fd1d227ef1b9
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diff
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|
2206 |
| 342 | 2207 SharedHeap::ref_processing_init(); |
| 2208 MemRegion mr = reserved_region(); | |
|
3979
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|
2209 |
|
4dfb2df418f2
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changeset
|
2210 // Concurrent Mark ref processor |
|
4dfb2df418f2
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3973
diff
changeset
|
2211 _ref_processor_cm = |
|
2369
92da084fefc9
6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads
ysr
parents:
2361
diff
changeset
|
2212 new ReferenceProcessor(mr, // span |
|
3979
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changeset
|
2213 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
|
4dfb2df418f2
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diff
changeset
|
2214 // mt processing |
|
4dfb2df418f2
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diff
changeset
|
2215 (int) ParallelGCThreads, |
|
4dfb2df418f2
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diff
changeset
|
2216 // degree of mt processing |
|
4dfb2df418f2
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parents:
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diff
changeset
|
2217 (ParallelGCThreads > 1) || (ConcGCThreads > 1), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2218 // mt discovery |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
2219 (int) MAX2(ParallelGCThreads, ConcGCThreads), |
|
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
2220 // degree of mt discovery |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2221 false, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2222 // Reference discovery is not atomic |
|
17976
8e20ef014b08
8043239: G1: Missing post barrier in processing of j.l.ref.Reference objects
brutisso
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17948
diff
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|
2223 &_is_alive_closure_cm); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2224 // is alive closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2225 // (for efficiency/performance) |
|
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
2226 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2227 // STW ref processor |
|
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
2228 _ref_processor_stw = |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2229 new ReferenceProcessor(mr, // span |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2230 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2231 // mt processing |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
2232 MAX2((int)ParallelGCThreads, 1), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2233 // degree of mt processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2234 (ParallelGCThreads > 1), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2235 // mt discovery |
|
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
2236 MAX2((int)ParallelGCThreads, 1), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2237 // degree of mt discovery |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
2238 true, |
|
4dfb2df418f2
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|
2239 // Reference discovery is atomic |
|
17976
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|
2240 &_is_alive_closure_stw); |
|
3979
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|
2241 // is alive closure |
|
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|
2242 // (for efficiency/performance) |
| 342 | 2243 } |
| 2244 | |
| 2245 size_t G1CollectedHeap::capacity() const { | |
| 2246 return _g1_committed.byte_size(); | |
| 2247 } | |
| 2248 | |
|
6254
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|
2249 void G1CollectedHeap::reset_gc_time_stamps(HeapRegion* hr) { |
|
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|
2250 assert(!hr->continuesHumongous(), "pre-condition"); |
|
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|
2251 hr->reset_gc_time_stamp(); |
|
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|
2252 if (hr->startsHumongous()) { |
|
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|
2253 uint first_index = hr->hrs_index() + 1; |
|
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|
2254 uint last_index = hr->last_hc_index(); |
|
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|
2255 for (uint i = first_index; i < last_index; i += 1) { |
|
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|
2256 HeapRegion* chr = region_at(i); |
|
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|
2257 assert(chr->continuesHumongous(), "sanity"); |
|
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|
2258 chr->reset_gc_time_stamp(); |
|
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|
2259 } |
|
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|
2260 } |
|
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|
2261 } |
|
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|
2262 |
|
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|
2263 #ifndef PRODUCT |
|
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|
2264 class CheckGCTimeStampsHRClosure : public HeapRegionClosure { |
|
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|
2265 private: |
|
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|
2266 unsigned _gc_time_stamp; |
|
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|
2267 bool _failures; |
|
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|
2268 |
|
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|
2269 public: |
|
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|
2270 CheckGCTimeStampsHRClosure(unsigned gc_time_stamp) : |
|
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|
2271 _gc_time_stamp(gc_time_stamp), _failures(false) { } |
|
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|
2272 |
|
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|
2273 virtual bool doHeapRegion(HeapRegion* hr) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
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changeset
|
2274 unsigned region_gc_time_stamp = hr->get_gc_time_stamp(); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2275 if (_gc_time_stamp != region_gc_time_stamp) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2276 gclog_or_tty->print_cr("Region "HR_FORMAT" has GC time stamp = %d, " |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2277 "expected %d", HR_FORMAT_PARAMS(hr), |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2278 region_gc_time_stamp, _gc_time_stamp); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2279 _failures = true; |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2280 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2281 return false; |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2282 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2283 |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2284 bool failures() { return _failures; } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2285 }; |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2286 |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2287 void G1CollectedHeap::check_gc_time_stamps() { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2288 CheckGCTimeStampsHRClosure cl(_gc_time_stamp); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2289 heap_region_iterate(&cl); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2290 guarantee(!cl.failures(), "all GC time stamps should have been reset"); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2291 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2292 #endif // PRODUCT |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2293 |
| 1705 | 2294 void G1CollectedHeap::iterate_dirty_card_closure(CardTableEntryClosure* cl, |
| 2295 DirtyCardQueue* into_cset_dcq, | |
| 2296 bool concurrent, | |
|
17844
8847586c9037
8016302: Change type of the number of GC workers to unsigned int (2)
vkempik
parents:
17833
diff
changeset
|
2297 uint worker_i) { |
| 889 | 2298 // Clean cards in the hot card cache |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2299 G1HotCardCache* hot_card_cache = _cg1r->hot_card_cache(); |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2300 hot_card_cache->drain(worker_i, g1_rem_set(), into_cset_dcq); |
| 889 | 2301 |
| 342 | 2302 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); |
| 2303 int n_completed_buffers = 0; | |
| 1705 | 2304 while (dcqs.apply_closure_to_completed_buffer(cl, worker_i, 0, true)) { |
| 342 | 2305 n_completed_buffers++; |
| 2306 } | |
|
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
2307 g1_policy()->phase_times()->record_update_rs_processed_buffers(worker_i, n_completed_buffers); |
| 342 | 2308 dcqs.clear_n_completed_buffers(); |
| 2309 assert(!dcqs.completed_buffers_exist_dirty(), "Completed buffers exist!"); | |
| 2310 } | |
| 2311 | |
| 2312 | |
| 2313 // Computes the sum of the storage used by the various regions. | |
| 2314 | |
| 2315 size_t G1CollectedHeap::used() const { | |
|
862
36b5611220a7
6863216: Clean up debugging debris inadvertently pushed with 6700789
ysr
parents:
861
diff
changeset
|
2316 assert(Heap_lock->owner() != NULL, |
|
36b5611220a7
6863216: Clean up debugging debris inadvertently pushed with 6700789
ysr
parents:
861
diff
changeset
|
2317 "Should be owned on this thread's behalf."); |
| 342 | 2318 size_t result = _summary_bytes_used; |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2319 // Read only once in case it is set to NULL concurrently |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2320 HeapRegion* hr = _mutator_alloc_region.get(); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2321 if (hr != NULL) |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2322 result += hr->used(); |
| 342 | 2323 return result; |
| 2324 } | |
| 2325 | |
|
846
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2326 size_t G1CollectedHeap::used_unlocked() const { |
|
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2327 size_t result = _summary_bytes_used; |
|
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2328 return result; |
|
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2329 } |
|
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2330 |
| 342 | 2331 class SumUsedClosure: public HeapRegionClosure { |
| 2332 size_t _used; | |
| 2333 public: | |
| 2334 SumUsedClosure() : _used(0) {} | |
| 2335 bool doHeapRegion(HeapRegion* r) { | |
| 2336 if (!r->continuesHumongous()) { | |
| 2337 _used += r->used(); | |
| 2338 } | |
| 2339 return false; | |
| 2340 } | |
| 2341 size_t result() { return _used; } | |
| 2342 }; | |
| 2343 | |
| 2344 size_t G1CollectedHeap::recalculate_used() const { | |
|
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
2345 double recalculate_used_start = os::elapsedTime(); |
|
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
2346 |
| 342 | 2347 SumUsedClosure blk; |
| 3766 | 2348 heap_region_iterate(&blk); |
|
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
2349 |
|
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
2350 g1_policy()->phase_times()->record_evac_fail_recalc_used_time((os::elapsedTime() - recalculate_used_start) * 1000.0); |
| 342 | 2351 return blk.result(); |
| 2352 } | |
| 2353 | |
| 2354 size_t G1CollectedHeap::unsafe_max_alloc() { | |
| 2152 | 2355 if (free_regions() > 0) return HeapRegion::GrainBytes; |
| 342 | 2356 // otherwise, is there space in the current allocation region? |
| 2357 | |
| 2358 // We need to store the current allocation region in a local variable | |
| 2359 // here. The problem is that this method doesn't take any locks and | |
| 2360 // there may be other threads which overwrite the current allocation | |
| 2361 // region field. attempt_allocation(), for example, sets it to NULL | |
| 2362 // and this can happen *after* the NULL check here but before the call | |
| 2363 // to free(), resulting in a SIGSEGV. Note that this doesn't appear | |
| 2364 // to be a problem in the optimized build, since the two loads of the | |
| 2365 // current allocation region field are optimized away. | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2366 HeapRegion* hr = _mutator_alloc_region.get(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2367 if (hr == NULL) { |
| 342 | 2368 return 0; |
| 2369 } | |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2370 return hr->free(); |
| 342 | 2371 } |
| 2372 | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2373 bool G1CollectedHeap::should_do_concurrent_full_gc(GCCause::Cause cause) { |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2374 switch (cause) { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2375 case GCCause::_gc_locker: return GCLockerInvokesConcurrent; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2376 case GCCause::_java_lang_system_gc: return ExplicitGCInvokesConcurrent; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2377 case GCCause::_g1_humongous_allocation: return true; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2378 default: return false; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2379 } |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2380 } |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2381 |
|
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2382 #ifndef PRODUCT |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2383 void G1CollectedHeap::allocate_dummy_regions() { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2384 // Let's fill up most of the region |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2385 size_t word_size = HeapRegion::GrainWords - 1024; |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2386 // And as a result the region we'll allocate will be humongous. |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2387 guarantee(isHumongous(word_size), "sanity"); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2388 |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2389 for (uintx i = 0; i < G1DummyRegionsPerGC; ++i) { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2390 // Let's use the existing mechanism for the allocation |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2391 HeapWord* dummy_obj = humongous_obj_allocate(word_size); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2392 if (dummy_obj != NULL) { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2393 MemRegion mr(dummy_obj, word_size); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2394 CollectedHeap::fill_with_object(mr); |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2395 } else { |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2396 // If we can't allocate once, we probably cannot allocate |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2397 // again. Let's get out of the loop. |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2398 break; |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2399 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2400 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2401 } |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2402 #endif // !PRODUCT |
|
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2403 |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2404 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
|
2405 assert(_old_marking_cycles_started == _old_marking_cycles_completed || |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2406 _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
|
2407 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
|
2408 _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
|
2409 |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2410 _old_marking_cycles_started++; |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2411 } |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2412 |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2413 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
|
2414 MonitorLockerEx x(FullGCCount_lock, Mutex::_no_safepoint_check_flag); |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2415 |
|
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2416 // 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
|
2417 // 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
|
2418 // 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
|
2419 // assert here. |
|
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2420 |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2421 // 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
|
2422 // 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
|
2423 // interrupt a concurrent cycle), the number of full collections |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2424 // 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
|
2425 // 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
|
2426 // behind the number of full collections started. |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2427 |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2428 // 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
|
2429 assert(concurrent || |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2430 (_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
|
2431 (_old_marking_cycles_started == _old_marking_cycles_completed + 2), |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
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6109
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changeset
|
2432 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
|
2433 "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
|
2434 _old_marking_cycles_started, _old_marking_cycles_completed)); |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2435 |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2436 // 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
|
2437 assert(!concurrent || |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2438 (_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
|
2439 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
|
2440 "_old_marking_cycles_started = %u " |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2441 "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
|
2442 _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
|
2443 |
|
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2444 _old_marking_cycles_completed += 1; |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2445 |
|
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2446 // 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
|
2447 // we wake up any waiters (especially when ExplicitInvokesConcurrent |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2448 // is set) so that if a waiter requests another System.gc() it doesn't |
| 10405 | 2449 // incorrectly see that a marking cycle is still in progress. |
|
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2450 if (concurrent) { |
|
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2451 _cmThread->clear_in_progress(); |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2452 } |
|
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2453 |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2454 // 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
|
2455 // System.gc() with (with ExplicitGCInvokesConcurrent set or not) |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2456 // 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
|
2457 // waiting in VM_G1IncCollectionPause::doit_epilogue(). |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
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parents:
1611
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changeset
|
2458 FullGCCount_lock->notify_all(); |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2459 } |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
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diff
changeset
|
2460 |
|
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
2461 void G1CollectedHeap::register_concurrent_cycle_start(const Ticks& start_time) { |
| 10405 | 2462 _concurrent_cycle_started = true; |
| 2463 _gc_timer_cm->register_gc_start(start_time); | |
| 2464 | |
| 2465 _gc_tracer_cm->report_gc_start(gc_cause(), _gc_timer_cm->gc_start()); | |
| 2466 trace_heap_before_gc(_gc_tracer_cm); | |
| 2467 } | |
| 2468 | |
| 2469 void G1CollectedHeap::register_concurrent_cycle_end() { | |
| 2470 if (_concurrent_cycle_started) { | |
| 2471 if (_cm->has_aborted()) { | |
| 2472 _gc_tracer_cm->report_concurrent_mode_failure(); | |
| 2473 } | |
|
12179
f175e3678be2
8020692: TestGCEventMixed.java failed because of timestamp in event after end event
ehelin
parents:
12116
diff
changeset
|
2474 |
|
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
2475 _gc_timer_cm->register_gc_end(); |
| 10405 | 2476 _gc_tracer_cm->report_gc_end(_gc_timer_cm->gc_end(), _gc_timer_cm->time_partitions()); |
| 2477 | |
| 2478 _concurrent_cycle_started = false; | |
| 2479 } | |
| 2480 } | |
| 2481 | |
| 2482 void G1CollectedHeap::trace_heap_after_concurrent_cycle() { | |
| 2483 if (_concurrent_cycle_started) { | |
| 2484 trace_heap_after_gc(_gc_tracer_cm); | |
| 2485 } | |
| 2486 } | |
| 2487 | |
| 2488 G1YCType G1CollectedHeap::yc_type() { | |
| 2489 bool is_young = g1_policy()->gcs_are_young(); | |
| 2490 bool is_initial_mark = g1_policy()->during_initial_mark_pause(); | |
| 2491 bool is_during_mark = mark_in_progress(); | |
| 2492 | |
| 2493 if (is_initial_mark) { | |
| 2494 return InitialMark; | |
| 2495 } else if (is_during_mark) { | |
| 2496 return DuringMark; | |
| 2497 } else if (is_young) { | |
| 2498 return Normal; | |
| 2499 } else { | |
| 2500 return Mixed; | |
| 2501 } | |
| 2502 } | |
| 2503 | |
|
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2504 void G1CollectedHeap::collect(GCCause::Cause cause) { |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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parents:
4875
diff
changeset
|
2505 assert_heap_not_locked(); |
|
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2506 |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2507 unsigned int gc_count_before; |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2508 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
|
2509 bool retry_gc; |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2510 |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2511 do { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2512 retry_gc = false; |
|
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 { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2515 MutexLocker ml(Heap_lock); |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2516 |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2517 // 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
|
2518 gc_count_before = total_collections(); |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2519 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
|
2520 } |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2521 |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2522 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
|
2523 // 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
|
2524 // 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
|
2525 // we are not requesting a post-GC allocation. |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2526 VM_G1IncCollectionPause op(gc_count_before, |
| 1973 | 2527 0, /* word_size */ |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2528 true, /* should_initiate_conc_mark */ |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2529 g1_policy()->max_pause_time_ms(), |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2530 cause); |
|
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2531 |
|
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2532 VMThread::execute(&op); |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2533 if (!op.pause_succeeded()) { |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2534 if (old_marking_count_before == _old_marking_cycles_started) { |
|
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2535 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
|
2536 } else { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2537 // 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
|
2538 // 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
|
2539 // 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
|
2540 } |
|
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2541 |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2542 if (retry_gc) { |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2543 if (GC_locker::is_active_and_needs_gc()) { |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2544 GC_locker::stall_until_clear(); |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2545 } |
|
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2546 } |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2547 } |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2548 } else { |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2549 if (cause == GCCause::_gc_locker |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2550 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
|
2551 |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2552 // 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
|
2553 // 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
|
2554 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
|
2555 0, /* word_size */ |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2556 false, /* should_initiate_conc_mark */ |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2557 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
|
2558 cause); |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2559 VMThread::execute(&op); |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2560 } else { |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2561 // Schedule a Full GC. |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2562 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
|
2563 VMThread::execute(&op); |
|
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2564 } |
|
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2565 } |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2566 } while (retry_gc); |
| 342 | 2567 } |
| 2568 | |
| 2569 bool G1CollectedHeap::is_in(const void* p) const { | |
| 4708 | 2570 if (_g1_committed.contains(p)) { |
| 2571 // Given that we know that p is in the committed space, | |
| 2572 // heap_region_containing_raw() should successfully | |
| 2573 // return the containing region. | |
| 2574 HeapRegion* hr = heap_region_containing_raw(p); | |
| 342 | 2575 return hr->is_in(p); |
| 2576 } else { | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
2577 return false; |
| 342 | 2578 } |
| 2579 } | |
| 2580 | |
| 2581 // Iteration functions. | |
| 2582 | |
| 2583 // Iterates an OopClosure over all ref-containing fields of objects | |
| 2584 // within a HeapRegion. | |
| 2585 | |
| 2586 class IterateOopClosureRegionClosure: public HeapRegionClosure { | |
| 2587 MemRegion _mr; | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
changeset
|
2588 ExtendedOopClosure* _cl; |
| 342 | 2589 public: |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
2590 IterateOopClosureRegionClosure(MemRegion mr, ExtendedOopClosure* cl) |
| 342 | 2591 : _mr(mr), _cl(cl) {} |
| 2592 bool doHeapRegion(HeapRegion* r) { | |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2593 if (!r->continuesHumongous()) { |
| 342 | 2594 r->oop_iterate(_cl); |
| 2595 } | |
| 2596 return false; | |
| 2597 } | |
| 2598 }; | |
| 2599 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
2600 void G1CollectedHeap::oop_iterate(ExtendedOopClosure* cl) { |
| 342 | 2601 IterateOopClosureRegionClosure blk(_g1_committed, cl); |
| 3766 | 2602 heap_region_iterate(&blk); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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2603 } |
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2604 |
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2605 void G1CollectedHeap::oop_iterate(MemRegion mr, ExtendedOopClosure* cl) { |
| 342 | 2606 IterateOopClosureRegionClosure blk(mr, cl); |
| 3766 | 2607 heap_region_iterate(&blk); |
| 342 | 2608 } |
| 2609 | |
| 2610 // Iterates an ObjectClosure over all objects within a HeapRegion. | |
| 2611 | |
| 2612 class IterateObjectClosureRegionClosure: public HeapRegionClosure { | |
| 2613 ObjectClosure* _cl; | |
| 2614 public: | |
| 2615 IterateObjectClosureRegionClosure(ObjectClosure* cl) : _cl(cl) {} | |
| 2616 bool doHeapRegion(HeapRegion* r) { | |
| 2617 if (! r->continuesHumongous()) { | |
| 2618 r->object_iterate(_cl); | |
| 2619 } | |
| 2620 return false; | |
| 2621 } | |
| 2622 }; | |
| 2623 | |
|
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2624 void G1CollectedHeap::object_iterate(ObjectClosure* cl) { |
| 342 | 2625 IterateObjectClosureRegionClosure blk(cl); |
| 3766 | 2626 heap_region_iterate(&blk); |
| 342 | 2627 } |
| 2628 | |
| 2629 // Calls a SpaceClosure on a HeapRegion. | |
| 2630 | |
| 2631 class SpaceClosureRegionClosure: public HeapRegionClosure { | |
| 2632 SpaceClosure* _cl; | |
| 2633 public: | |
| 2634 SpaceClosureRegionClosure(SpaceClosure* cl) : _cl(cl) {} | |
| 2635 bool doHeapRegion(HeapRegion* r) { | |
| 2636 _cl->do_space(r); | |
| 2637 return false; | |
| 2638 } | |
| 2639 }; | |
| 2640 | |
| 2641 void G1CollectedHeap::space_iterate(SpaceClosure* cl) { | |
| 2642 SpaceClosureRegionClosure blk(cl); | |
| 3766 | 2643 heap_region_iterate(&blk); |
| 342 | 2644 } |
| 2645 | |
| 3766 | 2646 void G1CollectedHeap::heap_region_iterate(HeapRegionClosure* cl) const { |
| 2647 _hrs.iterate(cl); | |
| 342 | 2648 } |
| 2649 | |
| 2650 void | |
| 2651 G1CollectedHeap::heap_region_par_iterate_chunked(HeapRegionClosure* cl, | |
|
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2652 uint worker_id, |
|
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2653 uint no_of_par_workers, |
| 342 | 2654 jint claim_value) { |
|
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2655 const uint regions = n_regions(); |
|
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2656 const uint max_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
|
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2657 no_of_par_workers : |
|
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|
2658 1); |
|
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|
2659 assert(UseDynamicNumberOfGCThreads || |
|
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2660 no_of_par_workers == workers()->total_workers(), |
|
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2661 "Non dynamic should use fixed number of workers"); |
| 355 | 2662 // try to spread out the starting points of the workers |
|
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2663 const HeapRegion* start_hr = |
|
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2664 start_region_for_worker(worker_id, no_of_par_workers); |
|
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2665 const uint start_index = start_hr->hrs_index(); |
| 355 | 2666 |
| 2667 // each worker will actually look at all regions | |
|
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2668 for (uint count = 0; count < regions; ++count) { |
|
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2669 const uint index = (start_index + count) % regions; |
| 355 | 2670 assert(0 <= index && index < regions, "sanity"); |
| 2671 HeapRegion* r = region_at(index); | |
| 2672 // we'll ignore "continues humongous" regions (we'll process them | |
| 2673 // when we come across their corresponding "start humongous" | |
| 2674 // region) and regions already claimed | |
| 2675 if (r->claim_value() == claim_value || r->continuesHumongous()) { | |
| 2676 continue; | |
| 2677 } | |
| 2678 // OK, try to claim it | |
| 342 | 2679 if (r->claimHeapRegion(claim_value)) { |
| 355 | 2680 // success! |
| 2681 assert(!r->continuesHumongous(), "sanity"); | |
| 2682 if (r->startsHumongous()) { | |
| 2683 // If the region is "starts humongous" we'll iterate over its | |
| 2684 // "continues humongous" first; in fact we'll do them | |
| 2685 // first. The order is important. In on case, calling the | |
| 2686 // closure on the "starts humongous" region might de-allocate | |
| 2687 // and clear all its "continues humongous" regions and, as a | |
| 2688 // result, we might end up processing them twice. So, we'll do | |
| 2689 // them first (notice: most closures will ignore them anyway) and | |
| 2690 // then we'll do the "starts humongous" region. | |
|
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2691 for (uint ch_index = index + 1; ch_index < regions; ++ch_index) { |
| 355 | 2692 HeapRegion* chr = region_at(ch_index); |
| 2693 | |
| 2694 // if the region has already been claimed or it's not | |
| 2695 // "continues humongous" we're done | |
| 2696 if (chr->claim_value() == claim_value || | |
| 2697 !chr->continuesHumongous()) { | |
| 2698 break; | |
| 2699 } | |
| 2700 | |
| 10405 | 2701 // No one should have claimed it directly. We can given |
| 355 | 2702 // that we claimed its "starts humongous" region. |
| 2703 assert(chr->claim_value() != claim_value, "sanity"); | |
| 2704 assert(chr->humongous_start_region() == r, "sanity"); | |
| 2705 | |
| 2706 if (chr->claimHeapRegion(claim_value)) { | |
| 10405 | 2707 // we should always be able to claim it; no one else should |
| 355 | 2708 // be trying to claim this region |
| 2709 | |
| 2710 bool res2 = cl->doHeapRegion(chr); | |
| 2711 assert(!res2, "Should not abort"); | |
| 2712 | |
| 2713 // Right now, this holds (i.e., no closure that actually | |
| 2714 // does something with "continues humongous" regions | |
| 2715 // clears them). We might have to weaken it in the future, | |
| 2716 // but let's leave these two asserts here for extra safety. | |
| 2717 assert(chr->continuesHumongous(), "should still be the case"); | |
| 2718 assert(chr->humongous_start_region() == r, "sanity"); | |
| 2719 } else { | |
| 2720 guarantee(false, "we should not reach here"); | |
| 2721 } | |
| 2722 } | |
| 2723 } | |
| 2724 | |
| 2725 assert(!r->continuesHumongous(), "sanity"); | |
| 2726 bool res = cl->doHeapRegion(r); | |
| 2727 assert(!res, "Should not abort"); | |
| 2728 } | |
| 2729 } | |
| 2730 } | |
| 2731 | |
| 390 | 2732 class ResetClaimValuesClosure: public HeapRegionClosure { |
| 2733 public: | |
| 2734 bool doHeapRegion(HeapRegion* r) { | |
| 2735 r->set_claim_value(HeapRegion::InitialClaimValue); | |
| 2736 return false; | |
| 2737 } | |
| 2738 }; | |
| 2739 | |
|
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|
2740 void G1CollectedHeap::reset_heap_region_claim_values() { |
| 390 | 2741 ResetClaimValuesClosure blk; |
| 2742 heap_region_iterate(&blk); | |
| 2743 } | |
| 2744 | |
|
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2745 void G1CollectedHeap::reset_cset_heap_region_claim_values() { |
|
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|
2746 ResetClaimValuesClosure blk; |
|
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|
2747 collection_set_iterate(&blk); |
|
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|
2748 } |
|
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|
2749 |
| 355 | 2750 #ifdef ASSERT |
| 2751 // This checks whether all regions in the heap have the correct claim | |
| 2752 // value. I also piggy-backed on this a check to ensure that the | |
| 2753 // humongous_start_region() information on "continues humongous" | |
| 2754 // regions is correct. | |
| 2755 | |
| 2756 class CheckClaimValuesClosure : public HeapRegionClosure { | |
| 2757 private: | |
| 2758 jint _claim_value; | |
|
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|
2759 uint _failures; |
| 355 | 2760 HeapRegion* _sh_region; |
|
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2761 |
| 355 | 2762 public: |
| 2763 CheckClaimValuesClosure(jint claim_value) : | |
| 2764 _claim_value(claim_value), _failures(0), _sh_region(NULL) { } | |
| 2765 bool doHeapRegion(HeapRegion* r) { | |
| 2766 if (r->claim_value() != _claim_value) { | |
|
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|
2767 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
| 355 | 2768 "claim value = %d, should be %d", |
|
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|
2769 HR_FORMAT_PARAMS(r), |
|
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|
2770 r->claim_value(), _claim_value); |
| 355 | 2771 ++_failures; |
| 2772 } | |
| 2773 if (!r->isHumongous()) { | |
| 2774 _sh_region = NULL; | |
| 2775 } else if (r->startsHumongous()) { | |
| 2776 _sh_region = r; | |
| 2777 } else if (r->continuesHumongous()) { | |
| 2778 if (r->humongous_start_region() != _sh_region) { | |
|
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|
2779 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
| 355 | 2780 "HS = "PTR_FORMAT", should be "PTR_FORMAT, |
|
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|
2781 HR_FORMAT_PARAMS(r), |
| 355 | 2782 r->humongous_start_region(), |
| 2783 _sh_region); | |
| 2784 ++_failures; | |
| 342 | 2785 } |
| 2786 } | |
| 355 | 2787 return false; |
| 2788 } | |
|
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|
2789 uint failures() { return _failures; } |
| 355 | 2790 }; |
| 2791 | |
| 2792 bool G1CollectedHeap::check_heap_region_claim_values(jint claim_value) { | |
| 2793 CheckClaimValuesClosure cl(claim_value); | |
| 2794 heap_region_iterate(&cl); | |
| 2795 return cl.failures() == 0; | |
| 2796 } | |
|
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|
2797 |
|
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|
2798 class CheckClaimValuesInCSetHRClosure: public HeapRegionClosure { |
|
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2799 private: |
|
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|
2800 jint _claim_value; |
|
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|
2801 uint _failures; |
|
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|
2802 |
|
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|
2803 public: |
|
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|
2804 CheckClaimValuesInCSetHRClosure(jint claim_value) : |
|
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|
2805 _claim_value(claim_value), _failures(0) { } |
|
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|
2806 |
|
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|
2807 uint failures() { return _failures; } |
|
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|
2808 |
|
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|
2809 bool doHeapRegion(HeapRegion* hr) { |
|
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|
2810 assert(hr->in_collection_set(), "how?"); |
|
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|
2811 assert(!hr->isHumongous(), "H-region in CSet"); |
|
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|
2812 if (hr->claim_value() != _claim_value) { |
|
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|
2813 gclog_or_tty->print_cr("CSet Region " HR_FORMAT ", " |
|
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|
2814 "claim value = %d, should be %d", |
|
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|
2815 HR_FORMAT_PARAMS(hr), |
|
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|
2816 hr->claim_value(), _claim_value); |
|
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|
2817 _failures += 1; |
|
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|
2818 } |
|
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|
2819 return false; |
|
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|
2820 } |
|
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|
2821 }; |
|
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|
2822 |
|
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|
2823 bool G1CollectedHeap::check_cset_heap_region_claim_values(jint claim_value) { |
|
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|
2824 CheckClaimValuesInCSetHRClosure cl(claim_value); |
|
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|
2825 collection_set_iterate(&cl); |
|
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|
2826 return cl.failures() == 0; |
|
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|
2827 } |
| 355 | 2828 #endif // ASSERT |
| 342 | 2829 |
|
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|
2830 // Clear the cached CSet starting regions and (more importantly) |
|
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|
2831 // the time stamps. Called when we reset the GC time stamp. |
|
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|
2832 void G1CollectedHeap::clear_cset_start_regions() { |
|
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|
2833 assert(_worker_cset_start_region != NULL, "sanity"); |
|
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|
2834 assert(_worker_cset_start_region_time_stamp != NULL, "sanity"); |
|
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|
2835 |
|
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|
2836 int n_queues = MAX2((int)ParallelGCThreads, 1); |
|
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|
2837 for (int i = 0; i < n_queues; i++) { |
|
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|
2838 _worker_cset_start_region[i] = NULL; |
|
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|
2839 _worker_cset_start_region_time_stamp[i] = 0; |
|
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|
2840 } |
|
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|
2841 } |
|
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|
2842 |
|
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|
2843 // Given the id of a worker, obtain or calculate a suitable |
|
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|
2844 // starting region for iterating over the current collection set. |
|
17844
8847586c9037
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vkempik
parents:
17833
diff
changeset
|
2845 HeapRegion* G1CollectedHeap::start_cset_region_for_worker(uint worker_i) { |
|
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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parents:
4708
diff
changeset
|
2846 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
|
2847 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
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parents:
4708
diff
changeset
|
2848 HeapRegion* result = NULL; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2849 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
|
2850 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2851 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
|
2852 // 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
|
2853 // 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
|
2854 // 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
|
2855 // (when the collection set is empty). |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2856 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
|
2857 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
|
2858 return result; |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2859 } |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2860 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2861 // 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
|
2862 // 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
|
2863 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2864 // 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
|
2865 // 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
|
2866 // avoid contention. |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2867 // If we have: |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2868 // n collection set regions |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2869 // p threads |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2870 // 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
|
2871 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2872 result = g1_policy()->collection_set(); |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2873 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2874 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
|
2875 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
|
2876 assert(UseDynamicNumberOfGCThreads || |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2877 active_workers == workers()->total_workers(), |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2878 "Unless dynamic should use total workers"); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2879 |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2880 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
|
2881 uint start_ind = 0; |
|
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2882 |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2883 if (worker_i > 0 && |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2884 _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
|
2885 // Previous workers starting region is valid |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2886 // so let's iterate from there |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2887 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
|
2888 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
|
2889 } |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2890 |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2891 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
|
2892 result = result->next_in_collection_set(); |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2893 } |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2894 } |
|
4709
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 // 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
|
2897 // (when the collection set is empty). |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2898 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
|
2899 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
|
2900 "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
|
2901 _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
|
2902 OrderAccess::storestore(); |
|
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2903 _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
|
2904 return result; |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2905 } |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2906 |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2907 HeapRegion* G1CollectedHeap::start_region_for_worker(uint worker_i, |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2908 uint no_of_par_workers) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2909 uint worker_num = |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2910 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
|
2911 assert(UseDynamicNumberOfGCThreads || |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2912 no_of_par_workers == workers()->total_workers(), |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2913 "Non dynamic should use fixed number of workers"); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2914 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
|
2915 return region_at(start_index); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2916 } |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2917 |
| 342 | 2918 void G1CollectedHeap::collection_set_iterate(HeapRegionClosure* cl) { |
| 2919 HeapRegion* r = g1_policy()->collection_set(); | |
| 2920 while (r != NULL) { | |
| 2921 HeapRegion* next = r->next_in_collection_set(); | |
| 2922 if (cl->doHeapRegion(r)) { | |
| 2923 cl->incomplete(); | |
| 2924 return; | |
| 2925 } | |
| 2926 r = next; | |
| 2927 } | |
| 2928 } | |
| 2929 | |
| 2930 void G1CollectedHeap::collection_set_iterate_from(HeapRegion* r, | |
| 2931 HeapRegionClosure *cl) { | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2932 if (r == NULL) { |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2933 // 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
|
2934 return; |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2935 } |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2936 |
| 342 | 2937 assert(r->in_collection_set(), |
| 2938 "Start region must be a member of the collection set."); | |
| 2939 HeapRegion* cur = r; | |
| 2940 while (cur != NULL) { | |
| 2941 HeapRegion* next = cur->next_in_collection_set(); | |
| 2942 if (cl->doHeapRegion(cur) && false) { | |
| 2943 cl->incomplete(); | |
| 2944 return; | |
| 2945 } | |
| 2946 cur = next; | |
| 2947 } | |
| 2948 cur = g1_policy()->collection_set(); | |
| 2949 while (cur != r) { | |
| 2950 HeapRegion* next = cur->next_in_collection_set(); | |
| 2951 if (cl->doHeapRegion(cur) && false) { | |
| 2952 cl->incomplete(); | |
| 2953 return; | |
| 2954 } | |
| 2955 cur = next; | |
| 2956 } | |
| 2957 } | |
| 2958 | |
| 2959 CompactibleSpace* G1CollectedHeap::first_compactible_space() { | |
| 3766 | 2960 return n_regions() > 0 ? region_at(0) : NULL; |
| 342 | 2961 } |
| 2962 | |
| 2963 | |
| 2964 Space* G1CollectedHeap::space_containing(const void* addr) const { | |
| 2965 Space* res = heap_region_containing(addr); | |
| 2966 return res; | |
| 2967 } | |
| 2968 | |
| 2969 HeapWord* G1CollectedHeap::block_start(const void* addr) const { | |
| 2970 Space* sp = space_containing(addr); | |
| 2971 if (sp != NULL) { | |
| 2972 return sp->block_start(addr); | |
| 2973 } | |
| 2974 return NULL; | |
| 2975 } | |
| 2976 | |
| 2977 size_t G1CollectedHeap::block_size(const HeapWord* addr) const { | |
| 2978 Space* sp = space_containing(addr); | |
| 2979 assert(sp != NULL, "block_size of address outside of heap"); | |
| 2980 return sp->block_size(addr); | |
| 2981 } | |
| 2982 | |
| 2983 bool G1CollectedHeap::block_is_obj(const HeapWord* addr) const { | |
| 2984 Space* sp = space_containing(addr); | |
| 2985 return sp->block_is_obj(addr); | |
| 2986 } | |
| 2987 | |
| 2988 bool G1CollectedHeap::supports_tlab_allocation() const { | |
| 2989 return true; | |
| 2990 } | |
| 2991 | |
| 2992 size_t G1CollectedHeap::tlab_capacity(Thread* ignored) const { | |
| 17727 | 2993 return (_g1_policy->young_list_target_length() - young_list()->survivor_length()) * HeapRegion::GrainBytes; |
| 2994 } | |
| 2995 | |
| 2996 size_t G1CollectedHeap::tlab_used(Thread* ignored) const { | |
| 2997 return young_list()->eden_used_bytes(); | |
| 2998 } | |
| 2999 | |
| 3000 // For G1 TLABs should not contain humongous objects, so the maximum TLAB size | |
| 3001 // must be smaller than the humongous object limit. | |
| 3002 size_t G1CollectedHeap::max_tlab_size() const { | |
| 3003 return align_size_down(_humongous_object_threshold_in_words - 1, MinObjAlignment); | |
| 342 | 3004 } |
| 3005 | |
| 3006 size_t G1CollectedHeap::unsafe_max_tlab_alloc(Thread* ignored) const { | |
| 3007 // Return the remaining space in the cur alloc region, but not less than | |
| 3008 // the min TLAB size. | |
|
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
3009 |
|
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
3010 // Also, this value can be at most the humongous object threshold, |
| 10405 | 3011 // since we can't allow tlabs to grow big enough to accommodate |
|
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
3012 // humongous objects. |
|
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
3013 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3014 HeapRegion* hr = _mutator_alloc_region.get(); |
| 17727 | 3015 size_t max_tlab = max_tlab_size() * wordSize; |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3016 if (hr == NULL) { |
| 17727 | 3017 return max_tlab; |
| 342 | 3018 } else { |
| 17727 | 3019 return MIN2(MAX2(hr->free(), (size_t) MinTLABSize), max_tlab); |
| 342 | 3020 } |
| 3021 } | |
| 3022 | |
| 3023 size_t G1CollectedHeap::max_capacity() const { | |
|
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
3024 return _g1_reserved.byte_size(); |
| 342 | 3025 } |
| 3026 | |
| 3027 jlong G1CollectedHeap::millis_since_last_gc() { | |
| 3028 // assert(false, "NYI"); | |
| 3029 return 0; | |
| 3030 } | |
| 3031 | |
| 3032 void G1CollectedHeap::prepare_for_verify() { | |
| 3033 if (SafepointSynchronize::is_at_safepoint() || ! UseTLAB) { | |
| 3034 ensure_parsability(false); | |
| 3035 } | |
| 3036 g1_rem_set()->prepare_for_verify(); | |
| 3037 } | |
| 3038 | |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3039 bool G1CollectedHeap::allocated_since_marking(oop obj, HeapRegion* hr, |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3040 VerifyOption vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3041 switch (vo) { |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3042 case VerifyOption_G1UsePrevMarking: |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3043 return hr->obj_allocated_since_prev_marking(obj); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3044 case VerifyOption_G1UseNextMarking: |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3045 return hr->obj_allocated_since_next_marking(obj); |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3046 case VerifyOption_G1UseMarkWord: |
|
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3047 return false; |
|
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|
3048 default: |
|
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|
3049 ShouldNotReachHere(); |
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|
3050 } |
|
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|
3051 return false; // keep some compilers happy |
|
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|
3052 } |
|
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|
3053 |
|
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3054 HeapWord* G1CollectedHeap::top_at_mark_start(HeapRegion* hr, VerifyOption vo) { |
|
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3055 switch (vo) { |
|
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3056 case VerifyOption_G1UsePrevMarking: return hr->prev_top_at_mark_start(); |
|
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3057 case VerifyOption_G1UseNextMarking: return hr->next_top_at_mark_start(); |
|
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3058 case VerifyOption_G1UseMarkWord: return NULL; |
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3059 default: ShouldNotReachHere(); |
|
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|
3060 } |
|
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|
3061 return NULL; // keep some compilers happy |
|
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|
3062 } |
|
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|
3063 |
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3064 bool G1CollectedHeap::is_marked(oop obj, VerifyOption vo) { |
|
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|
3065 switch (vo) { |
|
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3066 case VerifyOption_G1UsePrevMarking: return isMarkedPrev(obj); |
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3067 case VerifyOption_G1UseNextMarking: return isMarkedNext(obj); |
|
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3068 case VerifyOption_G1UseMarkWord: return obj->is_gc_marked(); |
|
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|
3069 default: ShouldNotReachHere(); |
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|
3070 } |
|
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|
3071 return false; // keep some compilers happy |
|
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|
3072 } |
|
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|
3073 |
|
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3074 const char* G1CollectedHeap::top_at_mark_start_str(VerifyOption vo) { |
|
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3075 switch (vo) { |
|
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3076 case VerifyOption_G1UsePrevMarking: return "PTAMS"; |
|
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3077 case VerifyOption_G1UseNextMarking: return "NTAMS"; |
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3078 case VerifyOption_G1UseMarkWord: return "NONE"; |
|
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|
3079 default: ShouldNotReachHere(); |
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|
3080 } |
|
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|
3081 return NULL; // keep some compilers happy |
|
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|
3082 } |
|
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|
3083 |
|
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|
3084 class VerifyRootsClosure: public OopClosure { |
| 12080 | 3085 private: |
| 3086 G1CollectedHeap* _g1h; | |
| 3087 VerifyOption _vo; | |
| 3088 bool _failures; | |
| 3089 public: | |
| 3090 // _vo == UsePrevMarking -> use "prev" marking information, | |
| 3091 // _vo == UseNextMarking -> use "next" marking information, | |
| 3092 // _vo == UseMarkWord -> use mark word from object header. | |
| 3093 VerifyRootsClosure(VerifyOption vo) : | |
| 3094 _g1h(G1CollectedHeap::heap()), | |
| 3095 _vo(vo), | |
| 3096 _failures(false) { } | |
| 3097 | |
| 3098 bool failures() { return _failures; } | |
| 3099 | |
| 3100 template <class T> void do_oop_nv(T* p) { | |
| 3101 T heap_oop = oopDesc::load_heap_oop(p); | |
| 3102 if (!oopDesc::is_null(heap_oop)) { | |
| 3103 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 3104 if (_g1h->is_obj_dead_cond(obj, _vo)) { | |
| 3105 gclog_or_tty->print_cr("Root location "PTR_FORMAT" " | |
| 3106 "points to dead obj "PTR_FORMAT, p, (void*) obj); | |
| 3107 if (_vo == VerifyOption_G1UseMarkWord) { | |
| 3108 gclog_or_tty->print_cr(" Mark word: "PTR_FORMAT, (void*)(obj->mark())); | |
| 3109 } | |
| 3110 obj->print_on(gclog_or_tty); | |
| 3111 _failures = true; | |
| 3112 } | |
| 3113 } | |
| 3114 } | |
| 3115 | |
| 3116 void do_oop(oop* p) { do_oop_nv(p); } | |
| 3117 void do_oop(narrowOop* p) { do_oop_nv(p); } | |
| 3118 }; | |
| 3119 | |
|
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|
3120 class G1VerifyCodeRootOopClosure: public OopClosure { |
| 12080 | 3121 G1CollectedHeap* _g1h; |
| 3122 OopClosure* _root_cl; | |
| 3123 nmethod* _nm; | |
| 3124 VerifyOption _vo; | |
| 3125 bool _failures; | |
| 3126 | |
| 3127 template <class T> void do_oop_work(T* p) { | |
| 3128 // First verify that this root is live | |
| 3129 _root_cl->do_oop(p); | |
| 3130 | |
| 3131 if (!G1VerifyHeapRegionCodeRoots) { | |
| 3132 // We're not verifying the code roots attached to heap region. | |
| 3133 return; | |
| 3134 } | |
| 3135 | |
| 3136 // Don't check the code roots during marking verification in a full GC | |
| 3137 if (_vo == VerifyOption_G1UseMarkWord) { | |
| 3138 return; | |
| 3139 } | |
| 3140 | |
| 3141 // Now verify that the current nmethod (which contains p) is | |
| 3142 // in the code root list of the heap region containing the | |
| 3143 // object referenced by p. | |
| 3144 | |
| 3145 T heap_oop = oopDesc::load_heap_oop(p); | |
| 3146 if (!oopDesc::is_null(heap_oop)) { | |
| 3147 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 3148 | |
| 3149 // Now fetch the region containing the object | |
| 3150 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
| 3151 HeapRegionRemSet* hrrs = hr->rem_set(); | |
| 3152 // Verify that the strong code root list for this region | |
| 3153 // contains the nmethod | |
| 3154 if (!hrrs->strong_code_roots_list_contains(_nm)) { | |
| 3155 gclog_or_tty->print_cr("Code root location "PTR_FORMAT" " | |
| 3156 "from nmethod "PTR_FORMAT" not in strong " | |
| 3157 "code roots for region ["PTR_FORMAT","PTR_FORMAT")", | |
| 3158 p, _nm, hr->bottom(), hr->end()); | |
| 3159 _failures = true; | |
| 3160 } | |
| 3161 } | |
| 3162 } | |
| 3163 | |
| 3164 public: | |
| 3165 G1VerifyCodeRootOopClosure(G1CollectedHeap* g1h, OopClosure* root_cl, VerifyOption vo): | |
| 3166 _g1h(g1h), _root_cl(root_cl), _vo(vo), _nm(NULL), _failures(false) {} | |
| 3167 | |
| 3168 void do_oop(oop* p) { do_oop_work(p); } | |
| 3169 void do_oop(narrowOop* p) { do_oop_work(p); } | |
| 3170 | |
| 3171 void set_nmethod(nmethod* nm) { _nm = nm; } | |
| 3172 bool failures() { return _failures; } | |
| 3173 }; | |
| 3174 | |
| 3175 class G1VerifyCodeRootBlobClosure: public CodeBlobClosure { | |
| 3176 G1VerifyCodeRootOopClosure* _oop_cl; | |
| 3177 | |
| 3178 public: | |
| 3179 G1VerifyCodeRootBlobClosure(G1VerifyCodeRootOopClosure* oop_cl): | |
| 3180 _oop_cl(oop_cl) {} | |
| 3181 | |
| 3182 void do_code_blob(CodeBlob* cb) { | |
| 3183 nmethod* nm = cb->as_nmethod_or_null(); | |
| 3184 if (nm != NULL) { | |
| 3185 _oop_cl->set_nmethod(nm); | |
| 3186 nm->oops_do(_oop_cl); | |
| 3187 } | |
| 3188 } | |
| 3189 }; | |
| 3190 | |
| 3191 class YoungRefCounterClosure : public OopClosure { | |
| 3192 G1CollectedHeap* _g1h; | |
| 3193 int _count; | |
| 3194 public: | |
| 3195 YoungRefCounterClosure(G1CollectedHeap* g1h) : _g1h(g1h), _count(0) {} | |
| 3196 void do_oop(oop* p) { if (_g1h->is_in_young(*p)) { _count++; } } | |
| 3197 void do_oop(narrowOop* p) { ShouldNotReachHere(); } | |
| 3198 | |
| 3199 int count() { return _count; } | |
| 3200 void reset_count() { _count = 0; }; | |
| 3201 }; | |
| 3202 | |
| 3203 class VerifyKlassClosure: public KlassClosure { | |
| 3204 YoungRefCounterClosure _young_ref_counter_closure; | |
| 3205 OopClosure *_oop_closure; | |
| 3206 public: | |
| 3207 VerifyKlassClosure(G1CollectedHeap* g1h, OopClosure* cl) : _young_ref_counter_closure(g1h), _oop_closure(cl) {} | |
| 3208 void do_klass(Klass* k) { | |
| 3209 k->oops_do(_oop_closure); | |
| 3210 | |
| 3211 _young_ref_counter_closure.reset_count(); | |
| 3212 k->oops_do(&_young_ref_counter_closure); | |
| 3213 if (_young_ref_counter_closure.count() > 0) { | |
| 3214 guarantee(k->has_modified_oops(), err_msg("Klass %p, has young refs but is not dirty.", k)); | |
| 3215 } | |
| 3216 } | |
| 3217 }; | |
| 3218 | |
| 342 | 3219 class VerifyLivenessOopClosure: public OopClosure { |
|
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|
3220 G1CollectedHeap* _g1h; |
|
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|
3221 VerifyOption _vo; |
| 342 | 3222 public: |
|
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|
3223 VerifyLivenessOopClosure(G1CollectedHeap* g1h, VerifyOption vo): |
|
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|
3224 _g1h(g1h), _vo(vo) |
|
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|
3225 { } |
|
845
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diff
changeset
|
3226 void do_oop(narrowOop *p) { do_oop_work(p); } |
|
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diff
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|
3227 void do_oop( oop *p) { do_oop_work(p); } |
|
df6caf649ff7
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diff
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|
3228 |
|
df6caf649ff7
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diff
changeset
|
3229 template <class T> void do_oop_work(T *p) { |
|
df6caf649ff7
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838
diff
changeset
|
3230 oop obj = oopDesc::load_decode_heap_oop(p); |
|
3772
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changeset
|
3231 guarantee(obj == NULL || !_g1h->is_obj_dead_cond(obj, _vo), |
|
845
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diff
changeset
|
3232 "Dead object referenced by a not dead object"); |
| 342 | 3233 } |
| 3234 }; | |
| 3235 | |
| 3236 class VerifyObjsInRegionClosure: public ObjectClosure { | |
| 811 | 3237 private: |
| 342 | 3238 G1CollectedHeap* _g1h; |
| 3239 size_t _live_bytes; | |
| 3240 HeapRegion *_hr; | |
|
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changeset
|
3241 VerifyOption _vo; |
| 342 | 3242 public: |
|
3772
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changeset
|
3243 // _vo == UsePrevMarking -> use "prev" marking information, |
|
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|
3244 // _vo == UseNextMarking -> use "next" marking information, |
|
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|
3245 // _vo == UseMarkWord -> use mark word from object header. |
|
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changeset
|
3246 VerifyObjsInRegionClosure(HeapRegion *hr, VerifyOption vo) |
|
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|
3247 : _live_bytes(0), _hr(hr), _vo(vo) { |
| 342 | 3248 _g1h = G1CollectedHeap::heap(); |
| 3249 } | |
| 3250 void do_object(oop o) { | |
|
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|
3251 VerifyLivenessOopClosure isLive(_g1h, _vo); |
| 342 | 3252 assert(o != NULL, "Huh?"); |
|
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|
3253 if (!_g1h->is_obj_dead_cond(o, _vo)) { |
|
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|
3254 // If the object is alive according to the mark word, |
|
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|
3255 // then verify that the marking information agrees. |
|
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changeset
|
3256 // Note we can't verify the contra-positive of the |
|
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|
3257 // above: if the object is dead (according to the mark |
|
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|
3258 // word), it may not be marked, or may have been marked |
|
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|
3259 // but has since became dead, or may have been allocated |
|
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|
3260 // since the last marking. |
|
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changeset
|
3261 if (_vo == VerifyOption_G1UseMarkWord) { |
|
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changeset
|
3262 guarantee(!_g1h->is_obj_dead(o), "mark word and concurrent mark mismatch"); |
|
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|
3263 } |
|
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|
3264 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
changeset
|
3265 o->oop_iterate_no_header(&isLive); |
|
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changeset
|
3266 if (!_hr->obj_allocated_since_prev_marking(o)) { |
|
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diff
changeset
|
3267 size_t obj_size = o->size(); // Make sure we don't overflow |
|
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changeset
|
3268 _live_bytes += (obj_size * HeapWordSize); |
|
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|
3269 } |
| 342 | 3270 } |
| 3271 } | |
| 3272 size_t live_bytes() { return _live_bytes; } | |
| 3273 }; | |
| 3274 | |
| 3275 class PrintObjsInRegionClosure : public ObjectClosure { | |
| 3276 HeapRegion *_hr; | |
| 3277 G1CollectedHeap *_g1; | |
| 3278 public: | |
| 3279 PrintObjsInRegionClosure(HeapRegion *hr) : _hr(hr) { | |
| 3280 _g1 = G1CollectedHeap::heap(); | |
| 3281 }; | |
| 3282 | |
| 3283 void do_object(oop o) { | |
| 3284 if (o != NULL) { | |
| 3285 HeapWord *start = (HeapWord *) o; | |
| 3286 size_t word_sz = o->size(); | |
| 3287 gclog_or_tty->print("\nPrinting obj "PTR_FORMAT" of size " SIZE_FORMAT | |
| 3288 " isMarkedPrev %d isMarkedNext %d isAllocSince %d\n", | |
| 3289 (void*) o, word_sz, | |
| 3290 _g1->isMarkedPrev(o), | |
| 3291 _g1->isMarkedNext(o), | |
| 3292 _hr->obj_allocated_since_prev_marking(o)); | |
| 3293 HeapWord *end = start + word_sz; | |
| 3294 HeapWord *cur; | |
| 3295 int *val; | |
| 3296 for (cur = start; cur < end; cur++) { | |
| 3297 val = (int *) cur; | |
| 3298 gclog_or_tty->print("\t "PTR_FORMAT":"PTR_FORMAT"\n", val, *val); | |
| 3299 } | |
| 3300 } | |
| 3301 } | |
| 3302 }; | |
| 3303 | |
| 3304 class VerifyRegionClosure: public HeapRegionClosure { | |
| 811 | 3305 private: |
|
6254
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
3306 bool _par; |
|
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|
3307 VerifyOption _vo; |
|
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|
3308 bool _failures; |
| 811 | 3309 public: |
|
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|
3310 // _vo == UsePrevMarking -> use "prev" marking information, |
|
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|
3311 // _vo == UseNextMarking -> use "next" marking information, |
|
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|
3312 // _vo == UseMarkWord -> use mark word from object header. |
| 6008 | 3313 VerifyRegionClosure(bool par, VerifyOption vo) |
| 3314 : _par(par), | |
|
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|
3315 _vo(vo), |
|
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|
3316 _failures(false) {} |
|
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|
3317 |
|
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|
3318 bool failures() { |
|
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|
3319 return _failures; |
|
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|
3320 } |
|
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|
3321 |
| 342 | 3322 bool doHeapRegion(HeapRegion* r) { |
|
637
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|
3323 if (!r->continuesHumongous()) { |
|
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|
3324 bool failures = false; |
| 6008 | 3325 r->verify(_vo, &failures); |
|
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|
3326 if (failures) { |
|
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|
3327 _failures = true; |
|
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|
3328 } else { |
|
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|
3329 VerifyObjsInRegionClosure not_dead_yet_cl(r, _vo); |
|
1020
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|
3330 r->object_iterate(¬_dead_yet_cl); |
|
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|
3331 if (_vo != VerifyOption_G1UseNextMarking) { |
|
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|
3332 if (r->max_live_bytes() < not_dead_yet_cl.live_bytes()) { |
|
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|
3333 gclog_or_tty->print_cr("["PTR_FORMAT","PTR_FORMAT"] " |
|
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|
3334 "max_live_bytes "SIZE_FORMAT" " |
|
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|
3335 "< calculated "SIZE_FORMAT, |
|
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|
3336 r->bottom(), r->end(), |
|
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|
3337 r->max_live_bytes(), |
|
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|
3338 not_dead_yet_cl.live_bytes()); |
|
4787
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|
3339 _failures = true; |
|
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|
3340 } |
|
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|
3341 } else { |
|
2ace1c4ee8da
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changeset
|
3342 // When vo == UseNextMarking we cannot currently do a sanity |
|
2ace1c4ee8da
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changeset
|
3343 // check on the live bytes as the calculation has not been |
|
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|
3344 // finalized yet. |
|
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|
3345 } |
|
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|
3346 } |
| 342 | 3347 } |
|
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|
3348 return false; // stop the region iteration if we hit a failure |
| 342 | 3349 } |
| 3350 }; | |
| 3351 | |
| 12080 | 3352 // This is the task used for parallel verification of the heap regions |
| 390 | 3353 |
| 3354 class G1ParVerifyTask: public AbstractGangTask { | |
| 3355 private: | |
| 3356 G1CollectedHeap* _g1h; | |
|
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|
3357 VerifyOption _vo; |
|
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|
3358 bool _failures; |
| 390 | 3359 |
| 3360 public: | |
|
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|
3361 // _vo == UsePrevMarking -> use "prev" marking information, |
|
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changeset
|
3362 // _vo == UseNextMarking -> use "next" marking information, |
|
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|
3363 // _vo == UseMarkWord -> use mark word from object header. |
| 6008 | 3364 G1ParVerifyTask(G1CollectedHeap* g1h, VerifyOption vo) : |
| 390 | 3365 AbstractGangTask("Parallel verify task"), |
|
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|
3366 _g1h(g1h), |
|
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|
3367 _vo(vo), |
|
1020
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|
3368 _failures(false) { } |
|
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|
3369 |
|
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|
3370 bool failures() { |
|
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|
3371 return _failures; |
|
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|
3372 } |
| 390 | 3373 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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4711
diff
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|
3374 void work(uint worker_id) { |
|
637
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diff
changeset
|
3375 HandleMark hm; |
| 6008 | 3376 VerifyRegionClosure blk(true, _vo); |
|
4728
441e946dc1af
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jmasa
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diff
changeset
|
3377 _g1h->heap_region_par_iterate_chunked(&blk, worker_id, |
|
4095
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|
3378 _g1h->workers()->active_workers(), |
| 390 | 3379 HeapRegion::ParVerifyClaimValue); |
|
1020
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|
3380 if (blk.failures()) { |
|
ff2402f6a50b
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|
3381 _failures = true; |
|
ff2402f6a50b
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1019
diff
changeset
|
3382 } |
| 390 | 3383 } |
| 3384 }; | |
| 3385 | |
| 12080 | 3386 void G1CollectedHeap::verify(bool silent, VerifyOption vo) { |
|
8855
24ef5fb05e0f
8010463: G1: Crashes with -UseTLAB and heap verification
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8853
diff
changeset
|
3387 if (SafepointSynchronize::is_at_safepoint()) { |
| 12080 | 3388 assert(Thread::current()->is_VM_thread(), |
| 3389 "Expected to be executed serially by the VM thread at this point"); | |
| 3390 | |
|
6725
da91efe96a93
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coleenp
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diff
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|
3391 if (!silent) { gclog_or_tty->print("Roots "); } |
|
3772
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johnc
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diff
changeset
|
3392 VerifyRootsClosure rootsCl(vo); |
| 12080 | 3393 G1VerifyCodeRootOopClosure codeRootsCl(this, &rootsCl, vo); |
| 3394 G1VerifyCodeRootBlobClosure blobsCl(&codeRootsCl); | |
|
6725
da91efe96a93
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|
3395 VerifyKlassClosure klassCl(this, &rootsCl); |
|
3772
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|
3396 |
|
3293
1f4413413144
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3289
diff
changeset
|
3397 // We apply the relevant closures to all the oops in the |
|
1f4413413144
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ysr
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3289
diff
changeset
|
3398 // system dictionary, the string table and the code cache. |
|
20254
9fec19bb0659
8032379: Remove the is_scavenging flag to process_strong_roots
mgerdin
parents:
20224
diff
changeset
|
3399 const int so = SO_AllClasses | SO_Strings | SO_AllCodeCache; |
|
3772
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johnc
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3766
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|
3400 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
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|
3401 // Need cleared claim bits for the strong roots processing |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
3402 ClassLoaderDataGraph::clear_claimed_marks(); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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6629
diff
changeset
|
3403 |
|
3293
1f4413413144
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3289
diff
changeset
|
3404 process_strong_roots(true, // activate StrongRootsScope |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
3405 ScanningOption(so), // roots scanning options |
| 342 | 3406 &rootsCl, |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
3407 &blobsCl, |
|
6725
da91efe96a93
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coleenp
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6629
diff
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|
3408 &klassCl |
|
da91efe96a93
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6629
diff
changeset
|
3409 ); |
|
da91efe96a93
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diff
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|
3410 |
| 12080 | 3411 bool failures = rootsCl.failures() || codeRootsCl.failures(); |
|
3772
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|
3412 |
|
6747fd0512e0
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diff
changeset
|
3413 if (vo != VerifyOption_G1UseMarkWord) { |
|
6747fd0512e0
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3766
diff
changeset
|
3414 // If we're verifying during a full GC then the region sets |
|
6747fd0512e0
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3766
diff
changeset
|
3415 // will have been torn down at the start of the GC. Therefore |
|
6747fd0512e0
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3766
diff
changeset
|
3416 // verifying the region sets will fail. So we only verify |
|
6747fd0512e0
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diff
changeset
|
3417 // the region sets when not in a full GC. |
|
6747fd0512e0
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3766
diff
changeset
|
3418 if (!silent) { gclog_or_tty->print("HeapRegionSets "); } |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3419 verify_region_sets(); |
|
6747fd0512e0
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3766
diff
changeset
|
3420 } |
|
6747fd0512e0
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3766
diff
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|
3421 |
| 2152 | 3422 if (!silent) { gclog_or_tty->print("HeapRegions "); } |
| 390 | 3423 if (GCParallelVerificationEnabled && ParallelGCThreads > 1) { |
| 3424 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 3425 "sanity check"); | |
| 3426 | |
| 6008 | 3427 G1ParVerifyTask task(this, vo); |
|
4095
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4090
diff
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|
3428 assert(UseDynamicNumberOfGCThreads || |
|
bca17e38de00
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4090
diff
changeset
|
3429 workers()->active_workers() == workers()->total_workers(), |
|
bca17e38de00
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|
3430 "If not dynamic should be using all the workers"); |
|
bca17e38de00
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diff
changeset
|
3431 int n_workers = workers()->active_workers(); |
| 390 | 3432 set_par_threads(n_workers); |
| 3433 workers()->run_task(&task); | |
| 3434 set_par_threads(0); | |
|
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|
3435 if (task.failures()) { |
|
ff2402f6a50b
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1019
diff
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|
3436 failures = true; |
|
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diff
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|
3437 } |
| 390 | 3438 |
|
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|
3439 // Checks that the expected amount of parallel work was done. |
|
bca17e38de00
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4090
diff
changeset
|
3440 // The implication is that n_workers is > 0. |
| 390 | 3441 assert(check_heap_region_claim_values(HeapRegion::ParVerifyClaimValue), |
| 3442 "sanity check"); | |
| 3443 | |
| 3444 reset_heap_region_claim_values(); | |
| 3445 | |
| 3446 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 3447 "sanity check"); | |
| 3448 } else { | |
| 6008 | 3449 VerifyRegionClosure blk(false, vo); |
| 3766 | 3450 heap_region_iterate(&blk); |
|
1020
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1019
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|
3451 if (blk.failures()) { |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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1019
diff
changeset
|
3452 failures = true; |
|
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diff
changeset
|
3453 } |
| 390 | 3454 } |
| 2152 | 3455 if (!silent) gclog_or_tty->print("RemSet "); |
| 342 | 3456 rem_set()->verify(); |
|
1020
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|
3457 |
| 17764 | 3458 if (G1StringDedup::is_enabled()) { |
| 3459 if (!silent) gclog_or_tty->print("StrDedup "); | |
| 3460 G1StringDedup::verify(); | |
| 3461 } | |
| 3462 | |
|
1020
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changeset
|
3463 if (failures) { |
|
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diff
changeset
|
3464 gclog_or_tty->print_cr("Heap:"); |
|
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
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4072
diff
changeset
|
3465 // It helps to have the per-region information in the output to |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
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4072
diff
changeset
|
3466 // help us track down what went wrong. This is why we call |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
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4072
diff
changeset
|
3467 // print_extended_on() instead of print_on(). |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
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parents:
4072
diff
changeset
|
3468 print_extended_on(gclog_or_tty); |
|
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17935
diff
changeset
|
3469 gclog_or_tty->cr(); |
|
1547
fb1a39993f69
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
1545
diff
changeset
|
3470 #ifndef PRODUCT |
| 1044 | 3471 if (VerifyDuringGC && G1VerifyDuringGCPrintReachable) { |
| 1388 | 3472 concurrent_mark()->print_reachable("at-verification-failure", |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3473 vo, false /* all */); |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3474 } |
|
1547
fb1a39993f69
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
1545
diff
changeset
|
3475 #endif |
|
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3476 gclog_or_tty->flush(); |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3477 } |
|
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3478 guarantee(!failures, "there should not have been any failures"); |
| 342 | 3479 } else { |
| 17764 | 3480 if (!silent) { |
| 3481 gclog_or_tty->print("(SKIPPING Roots, HeapRegionSets, HeapRegions, RemSet"); | |
| 3482 if (G1StringDedup::is_enabled()) { | |
| 3483 gclog_or_tty->print(", StrDedup"); | |
| 3484 } | |
| 3485 gclog_or_tty->print(") "); | |
| 3486 } | |
| 342 | 3487 } |
| 3488 } | |
| 3489 | |
| 12080 | 3490 void G1CollectedHeap::verify(bool silent) { |
| 3491 verify(silent, VerifyOption_G1UsePrevMarking); | |
| 3492 } | |
| 3493 | |
| 3494 double G1CollectedHeap::verify(bool guard, const char* msg) { | |
| 3495 double verify_time_ms = 0.0; | |
| 3496 | |
| 3497 if (guard && total_collections() >= VerifyGCStartAt) { | |
| 3498 double verify_start = os::elapsedTime(); | |
| 3499 HandleMark hm; // Discard invalid handles created during verification | |
| 3500 prepare_for_verify(); | |
| 3501 Universe::verify(VerifyOption_G1UsePrevMarking, msg); | |
| 3502 verify_time_ms = (os::elapsedTime() - verify_start) * 1000; | |
| 3503 } | |
| 3504 | |
| 3505 return verify_time_ms; | |
| 3506 } | |
| 3507 | |
| 3508 void G1CollectedHeap::verify_before_gc() { | |
| 3509 double verify_time_ms = verify(VerifyBeforeGC, " VerifyBeforeGC:"); | |
| 3510 g1_policy()->phase_times()->record_verify_before_time_ms(verify_time_ms); | |
| 3511 } | |
| 3512 | |
| 3513 void G1CollectedHeap::verify_after_gc() { | |
| 3514 double verify_time_ms = verify(VerifyAfterGC, " VerifyAfterGC:"); | |
| 3515 g1_policy()->phase_times()->record_verify_after_time_ms(verify_time_ms); | |
| 3516 } | |
| 3517 | |
| 342 | 3518 class PrintRegionClosure: public HeapRegionClosure { |
| 3519 outputStream* _st; | |
| 3520 public: | |
| 3521 PrintRegionClosure(outputStream* st) : _st(st) {} | |
| 3522 bool doHeapRegion(HeapRegion* r) { | |
| 3523 r->print_on(_st); | |
| 3524 return false; | |
| 3525 } | |
| 3526 }; | |
| 3527 | |
|
17833
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3528 bool G1CollectedHeap::is_obj_dead_cond(const oop obj, |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3529 const HeapRegion* hr, |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3530 const VerifyOption vo) const { |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3531 switch (vo) { |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3532 case VerifyOption_G1UsePrevMarking: return is_obj_dead(obj, hr); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3533 case VerifyOption_G1UseNextMarking: return is_obj_ill(obj, hr); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3534 case VerifyOption_G1UseMarkWord: return !obj->is_gc_marked(); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3535 default: ShouldNotReachHere(); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3536 } |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3537 return false; // keep some compilers happy |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3538 } |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3539 |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3540 bool G1CollectedHeap::is_obj_dead_cond(const oop obj, |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3541 const VerifyOption vo) const { |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3542 switch (vo) { |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
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diff
changeset
|
3543 case VerifyOption_G1UsePrevMarking: return is_obj_dead(obj); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3544 case VerifyOption_G1UseNextMarking: return is_obj_ill(obj); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3545 case VerifyOption_G1UseMarkWord: return !obj->is_gc_marked(); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3546 default: ShouldNotReachHere(); |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3547 } |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3548 return false; // keep some compilers happy |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3549 } |
|
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3550 |
| 342 | 3551 void G1CollectedHeap::print_on(outputStream* st) const { |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3552 st->print(" %-20s", "garbage-first heap"); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3553 st->print(" total " SIZE_FORMAT "K, used " SIZE_FORMAT "K", |
|
846
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
3554 capacity()/K, used_unlocked()/K); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3555 st->print(" [" INTPTR_FORMAT ", " INTPTR_FORMAT ", " INTPTR_FORMAT ")", |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3556 _g1_storage.low_boundary(), |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3557 _g1_storage.high(), |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3558 _g1_storage.high_boundary()); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3559 st->cr(); |
|
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3983
diff
changeset
|
3560 st->print(" region size " SIZE_FORMAT "K, ", HeapRegion::GrainBytes / K); |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3561 uint young_regions = _young_list->length(); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3562 st->print("%u young (" SIZE_FORMAT "K), ", young_regions, |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3563 (size_t) young_regions * HeapRegion::GrainBytes / K); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3564 uint survivor_regions = g1_policy()->recorded_survivor_regions(); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3565 st->print("%u survivors (" SIZE_FORMAT "K)", survivor_regions, |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3566 (size_t) survivor_regions * HeapRegion::GrainBytes / K); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3567 st->cr(); |
|
6863
04155d9c8c76
8000358: G1: metaspace information not printed in PrintHeapAtGC output nor in hs_err file
johnc
parents:
6819
diff
changeset
|
3568 MetaspaceAux::print_on(st); |
|
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3569 } |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3570 |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3571 void G1CollectedHeap::print_extended_on(outputStream* st) const { |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3572 print_on(st); |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3573 |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3574 // Print the per-region information. |
|
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3575 st->cr(); |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3576 st->print_cr("Heap Regions: (Y=young(eden), SU=young(survivor), " |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3577 "HS=humongous(starts), HC=humongous(continues), " |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3578 "CS=collection set, F=free, TS=gc time stamp, " |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3579 "PTAMS=previous top-at-mark-start, " |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3580 "NTAMS=next top-at-mark-start)"); |
| 342 | 3581 PrintRegionClosure blk(st); |
| 3766 | 3582 heap_region_iterate(&blk); |
| 342 | 3583 } |
| 3584 | |
|
9076
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3585 void G1CollectedHeap::print_on_error(outputStream* st) const { |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3586 this->CollectedHeap::print_on_error(st); |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3587 |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3588 if (_cm != NULL) { |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3589 st->cr(); |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3590 _cm->print_on_error(st); |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3591 } |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3592 } |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3593 |
| 342 | 3594 void G1CollectedHeap::print_gc_threads_on(outputStream* st) const { |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
3595 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 1019 | 3596 workers()->print_worker_threads_on(st); |
| 3597 } | |
| 3598 _cmThread->print_on(st); | |
| 342 | 3599 st->cr(); |
| 1019 | 3600 _cm->print_worker_threads_on(st); |
| 3601 _cg1r->print_worker_threads_on(st); | |
| 17764 | 3602 if (G1StringDedup::is_enabled()) { |
| 3603 G1StringDedup::print_worker_threads_on(st); | |
| 3604 } | |
| 342 | 3605 } |
| 3606 | |
| 3607 void G1CollectedHeap::gc_threads_do(ThreadClosure* tc) const { | |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
3608 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 342 | 3609 workers()->threads_do(tc); |
| 3610 } | |
| 3611 tc->do_thread(_cmThread); | |
| 794 | 3612 _cg1r->threads_do(tc); |
| 17764 | 3613 if (G1StringDedup::is_enabled()) { |
| 3614 G1StringDedup::threads_do(tc); | |
| 3615 } | |
| 342 | 3616 } |
| 3617 | |
| 3618 void G1CollectedHeap::print_tracing_info() const { | |
| 3619 // We'll overload this to mean "trace GC pause statistics." | |
| 3620 if (TraceGen0Time || TraceGen1Time) { | |
| 3621 // The "G1CollectorPolicy" is keeping track of these stats, so delegate | |
| 3622 // to that. | |
| 3623 g1_policy()->print_tracing_info(); | |
| 3624 } | |
| 751 | 3625 if (G1SummarizeRSetStats) { |
| 342 | 3626 g1_rem_set()->print_summary_info(); |
| 3627 } | |
| 1282 | 3628 if (G1SummarizeConcMark) { |
| 342 | 3629 concurrent_mark()->print_summary_info(); |
| 3630 } | |
| 3631 g1_policy()->print_yg_surv_rate_info(); | |
| 3632 SpecializationStats::print(); | |
| 3633 } | |
| 3634 | |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3635 #ifndef PRODUCT |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3636 // Helpful for debugging RSet issues. |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3637 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3638 class PrintRSetsClosure : public HeapRegionClosure { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3639 private: |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3640 const char* _msg; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3641 size_t _occupied_sum; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3642 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3643 public: |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3644 bool doHeapRegion(HeapRegion* r) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3645 HeapRegionRemSet* hrrs = r->rem_set(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3646 size_t occupied = hrrs->occupied(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3647 _occupied_sum += occupied; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3648 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3649 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
|
3650 HR_FORMAT_PARAMS(r)); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3651 if (occupied == 0) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3652 gclog_or_tty->print_cr(" RSet is empty"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3653 } else { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3654 hrrs->print(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3655 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3656 gclog_or_tty->print_cr("----------"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3657 return false; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3658 } |
|
e8b0b0392037
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|
3659 |
|
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diff
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|
3660 PrintRSetsClosure(const char* msg) : _msg(msg), _occupied_sum(0) { |
|
e8b0b0392037
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tonyp
parents:
3774
diff
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|
3661 gclog_or_tty->cr(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3662 gclog_or_tty->print_cr("========================================"); |
|
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17935
diff
changeset
|
3663 gclog_or_tty->print_cr("%s", msg); |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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parents:
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diff
changeset
|
3664 gclog_or_tty->cr(); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3665 } |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3666 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
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diff
changeset
|
3667 ~PrintRSetsClosure() { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3668 gclog_or_tty->print_cr("Occupied Sum: "SIZE_FORMAT, _occupied_sum); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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parents:
3774
diff
changeset
|
3669 gclog_or_tty->print_cr("========================================"); |
|
e8b0b0392037
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tonyp
parents:
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diff
changeset
|
3670 gclog_or_tty->cr(); |
|
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7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
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diff
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|
3671 } |
|
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7046182: G1: remove unnecessary iterations over the collection set
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parents:
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diff
changeset
|
3672 }; |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
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diff
changeset
|
3673 |
|
e8b0b0392037
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diff
changeset
|
3674 void G1CollectedHeap::print_cset_rsets() { |
|
e8b0b0392037
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parents:
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diff
changeset
|
3675 PrintRSetsClosure cl("Printing CSet RSets"); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3676 collection_set_iterate(&cl); |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3677 } |
|
e8b0b0392037
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tonyp
parents:
3774
diff
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|
3678 |
|
e8b0b0392037
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diff
changeset
|
3679 void G1CollectedHeap::print_all_rsets() { |
|
e8b0b0392037
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changeset
|
3680 PrintRSetsClosure cl("Printing All RSets");; |
|
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7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
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diff
changeset
|
3681 heap_region_iterate(&cl); |
|
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7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
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|
3682 } |
|
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|
3683 #endif // PRODUCT |
|
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|
3684 |
| 342 | 3685 G1CollectedHeap* G1CollectedHeap::heap() { |
| 3686 assert(_sh->kind() == CollectedHeap::G1CollectedHeap, | |
| 3687 "not a garbage-first heap"); | |
| 3688 return _g1h; | |
| 3689 } | |
| 3690 | |
| 3691 void G1CollectedHeap::gc_prologue(bool full /* Ignored */) { | |
|
1245
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6904516: More object array barrier fixes, following up on 6906727
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diff
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|
3692 // always_do_update_barrier = false; |
| 342 | 3693 assert(InlineCacheBuffer::is_empty(), "should have cleaned up ICBuffer"); |
| 3694 // Fill TLAB's and such | |
| 17727 | 3695 accumulate_statistics_all_tlabs(); |
| 342 | 3696 ensure_parsability(true); |
|
12339
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
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12305
diff
changeset
|
3697 |
|
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
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12305
diff
changeset
|
3698 if (G1SummarizeRSetStats && (G1SummarizeRSetStatsPeriod > 0) && |
|
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
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diff
changeset
|
3699 (total_collections() % G1SummarizeRSetStatsPeriod == 0)) { |
|
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
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diff
changeset
|
3700 g1_rem_set()->print_periodic_summary_info("Before GC RS summary"); |
|
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
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diff
changeset
|
3701 } |
| 342 | 3702 } |
| 3703 | |
| 3704 void G1CollectedHeap::gc_epilogue(bool full /* Ignored */) { | |
|
10372
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8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
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diff
changeset
|
3705 |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
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diff
changeset
|
3706 if (G1SummarizeRSetStats && |
|
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8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
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parents:
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diff
changeset
|
3707 (G1SummarizeRSetStatsPeriod > 0) && |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
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10327
diff
changeset
|
3708 // we are at the end of the GC. Total collections has already been increased. |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3709 ((total_collections() - 1) % G1SummarizeRSetStatsPeriod == 0)) { |
|
12339
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
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diff
changeset
|
3710 g1_rem_set()->print_periodic_summary_info("After GC RS summary"); |
|
10372
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
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diff
changeset
|
3711 } |
|
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
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diff
changeset
|
3712 |
| 342 | 3713 // FIXME: what is this about? |
| 3714 // I'm ignoring the "fill_newgen()" call if "alloc_event_enabled" | |
| 3715 // is set. | |
| 3716 COMPILER2_PRESENT(assert(DerivedPointerTable::is_empty(), | |
| 3717 "derived pointer present")); | |
|
1245
6484c4ee11cb
6904516: More object array barrier fixes, following up on 6906727
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parents:
1166
diff
changeset
|
3718 // always_do_update_barrier = true; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3719 |
| 17727 | 3720 resize_all_tlabs(); |
| 3721 | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3722 // We have just completed a GC. Update the soft reference |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3723 // policy with the new heap occupancy |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3724 Universe::update_heap_info_at_gc(); |
| 342 | 3725 } |
| 3726 | |
| 1973 | 3727 HeapWord* G1CollectedHeap::do_collection_pause(size_t word_size, |
| 3728 unsigned int gc_count_before, | |
|
12113
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
12082
diff
changeset
|
3729 bool* succeeded, |
|
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
12082
diff
changeset
|
3730 GCCause::Cause gc_cause) { |
| 1973 | 3731 assert_heap_not_locked_and_not_at_safepoint(); |
| 342 | 3732 g1_policy()->record_stop_world_start(); |
| 1973 | 3733 VM_G1IncCollectionPause op(gc_count_before, |
| 3734 word_size, | |
| 3735 false, /* should_initiate_conc_mark */ | |
| 3736 g1_policy()->max_pause_time_ms(), | |
|
12113
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
12082
diff
changeset
|
3737 gc_cause); |
| 1973 | 3738 VMThread::execute(&op); |
| 3739 | |
| 3740 HeapWord* result = op.result(); | |
| 3741 bool ret_succeeded = op.prologue_succeeded() && op.pause_succeeded(); | |
| 3742 assert(result == NULL || ret_succeeded, | |
| 3743 "the result should be NULL if the VM did not succeed"); | |
| 3744 *succeeded = ret_succeeded; | |
| 3745 | |
| 3746 assert_heap_not_locked(); | |
| 3747 return result; | |
| 342 | 3748 } |
| 3749 | |
| 3750 void | |
| 3751 G1CollectedHeap::doConcurrentMark() { | |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3752 MutexLockerEx x(CGC_lock, Mutex::_no_safepoint_check_flag); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3753 if (!_cmThread->in_progress()) { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3754 _cmThread->set_started(); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3755 CGC_lock->notify(); |
| 342 | 3756 } |
| 3757 } | |
| 3758 | |
| 3759 size_t G1CollectedHeap::pending_card_num() { | |
| 3760 size_t extra_cards = 0; | |
| 3761 JavaThread *curr = Threads::first(); | |
| 3762 while (curr != NULL) { | |
| 3763 DirtyCardQueue& dcq = curr->dirty_card_queue(); | |
| 3764 extra_cards += dcq.size(); | |
| 3765 curr = curr->next(); | |
| 3766 } | |
| 3767 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
| 3768 size_t buffer_size = dcqs.buffer_size(); | |
| 3769 size_t buffer_num = dcqs.completed_buffers_num(); | |
| 6611 | 3770 |
| 3771 // PtrQueueSet::buffer_size() and PtrQueue:size() return sizes | |
| 3772 // in bytes - not the number of 'entries'. We need to convert | |
| 3773 // into a number of cards. | |
| 3774 return (buffer_size * buffer_num + extra_cards) / oopSize; | |
| 342 | 3775 } |
| 3776 | |
| 3777 size_t G1CollectedHeap::cards_scanned() { | |
| 1861 | 3778 return g1_rem_set()->cardsScanned(); |
| 342 | 3779 } |
| 3780 | |
| 3781 void | |
| 3782 G1CollectedHeap::setup_surviving_young_words() { | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3783 assert(_surviving_young_words == NULL, "pre-condition"); |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3784 uint array_length = g1_policy()->young_cset_region_length(); |
| 6197 | 3785 _surviving_young_words = NEW_C_HEAP_ARRAY(size_t, (size_t) array_length, mtGC); |
| 342 | 3786 if (_surviving_young_words == NULL) { |
|
10161
746b070f5022
8011661: Insufficient memory message says "malloc" when sometimes it should say "mmap"
ccheung
parents:
10099
diff
changeset
|
3787 vm_exit_out_of_memory(sizeof(size_t) * array_length, OOM_MALLOC_ERROR, |
| 342 | 3788 "Not enough space for young surv words summary."); |
| 3789 } | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3790 memset(_surviving_young_words, 0, (size_t) array_length * sizeof(size_t)); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3791 #ifdef ASSERT |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3792 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
|
3793 assert( _surviving_young_words[i] == 0, "memset above" ); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3794 } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3795 #endif // !ASSERT |
| 342 | 3796 } |
| 3797 | |
| 3798 void | |
| 3799 G1CollectedHeap::update_surviving_young_words(size_t* surv_young_words) { | |
| 3800 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
|
3801 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
|
3802 for (uint i = 0; i < array_length; ++i) { |
| 342 | 3803 _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
|
3804 } |
| 342 | 3805 } |
| 3806 | |
| 3807 void | |
| 3808 G1CollectedHeap::cleanup_surviving_young_words() { | |
| 3809 guarantee( _surviving_young_words != NULL, "pre-condition" ); | |
| 6197 | 3810 FREE_C_HEAP_ARRAY(size_t, _surviving_young_words, mtGC); |
| 342 | 3811 _surviving_young_words = NULL; |
| 3812 } | |
| 3813 | |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3814 #ifdef ASSERT |
|
e8b0b0392037
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tonyp
parents:
3774
diff
changeset
|
3815 class VerifyCSetClosure: public HeapRegionClosure { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3816 public: |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3817 bool doHeapRegion(HeapRegion* hr) { |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3818 // 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
|
3819 // 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
|
3820 // 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
|
3821 // 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
|
3822 // 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
|
3823 // 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
|
3824 // 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
|
3825 // 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
|
3826 // evacuation failure handling. |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3827 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
|
3828 |
|
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3829 // 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
|
3830 // perform on CSet regions. |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3831 return false; |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3832 } |
|
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3833 }; |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3834 #endif // ASSERT |
|
1261
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6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3835 |
| 1709 | 3836 #if TASKQUEUE_STATS |
| 3837 void G1CollectedHeap::print_taskqueue_stats_hdr(outputStream* const st) { | |
| 3838 st->print_raw_cr("GC Task Stats"); | |
| 3839 st->print_raw("thr "); TaskQueueStats::print_header(1, st); st->cr(); | |
| 3840 st->print_raw("--- "); TaskQueueStats::print_header(2, st); st->cr(); | |
| 3841 } | |
| 3842 | |
| 3843 void G1CollectedHeap::print_taskqueue_stats(outputStream* const st) const { | |
| 3844 print_taskqueue_stats_hdr(st); | |
| 3845 | |
| 3846 TaskQueueStats totals; | |
|
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3847 const int n = workers() != NULL ? workers()->total_workers() : 1; |
| 1709 | 3848 for (int i = 0; i < n; ++i) { |
| 3849 st->print("%3d ", i); task_queue(i)->stats.print(st); st->cr(); | |
| 3850 totals += task_queue(i)->stats; | |
| 3851 } | |
| 3852 st->print_raw("tot "); totals.print(st); st->cr(); | |
| 3853 | |
| 3854 DEBUG_ONLY(totals.verify()); | |
| 3855 } | |
| 3856 | |
| 3857 void G1CollectedHeap::reset_taskqueue_stats() { | |
|
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3858 const int n = workers() != NULL ? workers()->total_workers() : 1; |
| 1709 | 3859 for (int i = 0; i < n; ++i) { |
| 3860 task_queue(i)->stats.reset(); | |
| 3861 } | |
| 3862 } | |
| 3863 #endif // TASKQUEUE_STATS | |
| 3864 | |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3865 void G1CollectedHeap::log_gc_header() { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3866 if (!G1Log::fine()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3867 return; |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3868 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3869 |
|
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
3870 gclog_or_tty->gclog_stamp(_gc_tracer_stw->gc_id()); |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3871 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3872 GCCauseString gc_cause_str = GCCauseString("GC pause", gc_cause()) |
|
7455
0b54ffe4c2d3
8005672: Clean up some changes to GC logging with GCCause's
jmasa
parents:
7397
diff
changeset
|
3873 .append(g1_policy()->gcs_are_young() ? "(young)" : "(mixed)") |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3874 .append(g1_policy()->during_initial_mark_pause() ? " (initial-mark)" : ""); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3875 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3876 gclog_or_tty->print("[%s", (const char*)gc_cause_str); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3877 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3878 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3879 void G1CollectedHeap::log_gc_footer(double pause_time_sec) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3880 if (!G1Log::fine()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3881 return; |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3882 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3883 |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3884 if (G1Log::finer()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3885 if (evacuation_failed()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3886 gclog_or_tty->print(" (to-space exhausted)"); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3887 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3888 gclog_or_tty->print_cr(", %3.7f secs]", pause_time_sec); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3889 g1_policy()->phase_times()->note_gc_end(); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3890 g1_policy()->phase_times()->print(pause_time_sec); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3891 g1_policy()->print_detailed_heap_transition(); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3892 } else { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3893 if (evacuation_failed()) { |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3894 gclog_or_tty->print("--"); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3895 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3896 g1_policy()->print_heap_transition(); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3897 gclog_or_tty->print_cr(", %3.7f secs]", pause_time_sec); |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3898 } |
|
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
3899 gclog_or_tty->flush(); |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3900 } |
|
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3901 |
| 1973 | 3902 bool |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3903 G1CollectedHeap::do_collection_pause_at_safepoint(double target_pause_time_ms) { |
| 2152 | 3904 assert_at_safepoint(true /* should_be_vm_thread */); |
| 3905 guarantee(!is_gc_active(), "collection is not reentrant"); | |
| 3906 | |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3907 if (GC_locker::check_active_before_gc()) { |
| 1973 | 3908 return false; |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3909 } |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3910 |
|
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
3911 _gc_timer_stw->register_gc_start(); |
| 10405 | 3912 |
| 3913 _gc_tracer_stw->report_gc_start(gc_cause(), _gc_timer_stw->gc_start()); | |
| 3914 | |
|
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2039
diff
changeset
|
3915 SvcGCMarker sgcm(SvcGCMarker::MINOR); |
|
2039
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3916 ResourceMark rm; |
|
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3917 |
|
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4787
diff
changeset
|
3918 print_heap_before_gc(); |
| 10405 | 3919 trace_heap_before_gc(_gc_tracer_stw); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3920 |
| 2152 | 3921 verify_region_sets_optional(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3922 verify_dirty_young_regions(); |
| 2152 | 3923 |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3924 // 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
|
3925 // 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
|
3926 // for the duration of this pause. |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3927 g1_policy()->decide_on_conc_mark_initiation(); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3928 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3929 // 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
|
3930 assert(!g1_policy()->during_initial_mark_pause() || |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3931 g1_policy()->gcs_are_young(), "sanity"); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3932 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3933 // 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
|
3934 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
|
3935 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3936 // 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
|
3937 // 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
|
3938 // 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
|
3939 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
|
3940 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3941 // 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
|
3942 { |
| 10405 | 3943 EvacuationInfo evacuation_info; |
| 3944 | |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3945 if (g1_policy()->during_initial_mark_pause()) { |
|
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3946 // 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
|
3947 // full collection counter. |
|
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
3948 increment_old_marking_cycles_started(); |
| 10405 | 3949 register_concurrent_cycle_start(_gc_timer_stw->gc_start()); |
|
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3950 } |
| 10405 | 3951 |
| 3952 _gc_tracer_stw->report_yc_type(yc_type()); | |
| 3953 | |
|
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
3954 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
| 6030 | 3955 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3956 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
|
3957 workers()->active_workers() : 1); |
|
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
3958 double pause_start_sec = os::elapsedTime(); |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
3959 g1_policy()->phase_times()->note_gc_start(active_workers); |
|
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3960 log_gc_header(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3961 |
|
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
3962 TraceCollectorStats tcs(g1mm()->incremental_collection_counters()); |
|
3356
78542e2b5e35
7036199: Adding a notification to the implementation of GarbageCollectorMXBeans
fparain
parents:
3323
diff
changeset
|
3963 TraceMemoryManagerStats tms(false /* fullGC */, gc_cause()); |
|
1089
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
tonyp
parents:
1088
diff
changeset
|
3964 |
| 2361 | 3965 // If the secondary_free_list is not empty, append it to the |
| 3966 // free_list. No need to wait for the cleanup operation to finish; | |
| 3967 // the region allocation code will check the secondary_free_list | |
| 3968 // and wait if necessary. If the G1StressConcRegionFreeing flag is | |
| 3969 // set, skip this step so that the region allocation code has to | |
| 3970 // get entries from the secondary_free_list. | |
| 2152 | 3971 if (!G1StressConcRegionFreeing) { |
| 2361 | 3972 append_secondary_free_list_if_not_empty_with_lock(); |
| 2152 | 3973 } |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3974 |
| 12080 | 3975 assert(check_young_list_well_formed(), "young list should be well formed"); |
| 3976 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
| 3977 "sanity check"); | |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3978 |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3979 // 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
|
3980 // 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
|
3981 // it will be set. |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3982 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3983 { // 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
|
3984 IsGCActiveMark x; |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3985 |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3986 gc_prologue(false); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3987 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
|
3988 increment_gc_time_stamp(); |
| 342 | 3989 |
|
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
3990 verify_before_gc(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3991 |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3992 COMPILER2_PRESENT(DerivedPointerTable::clear()); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3993 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3994 // Please see comment in g1CollectedHeap.hpp and |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3995 // G1CollectedHeap::ref_processing_init() to see how |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3996 // reference processing currently works in G1. |
|
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 // Enable discovery in the STW reference processor |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3999 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4000 true /*verify_no_refs*/); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4001 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4002 { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4003 // We want to temporarily turn off discovery by the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4004 // CM ref processor, if necessary, and turn it back on |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4005 // on again later if we do. Using a scoped |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4006 // NoRefDiscovery object will do this. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4007 NoRefDiscovery no_cm_discovery(ref_processor_cm()); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4008 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4009 // 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
|
4010 // of the collection set!). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4011 release_mutator_alloc_region(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4012 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4013 // We should call this after we retire the mutator alloc |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4014 // region(s) so that all the ALLOC / RETIRE events are generated |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4015 // before the start GC event. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4016 _hr_printer.start_gc(false /* full */, (size_t) total_collections()); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4017 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4018 // 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
|
4019 // 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
|
4020 // 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
|
4021 // |
|
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4022 // 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
|
4023 // |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4024 // The elapsed time induced by the start time below deliberately elides |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4025 // 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
|
4026 double sample_start_time_sec = os::elapsedTime(); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4027 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4028 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4029 gclog_or_tty->print_cr("\nBefore recording pause start.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4030 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4031 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
|
4032 #endif // YOUNG_LIST_VERBOSE |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4033 |
|
10098
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
4034 g1_policy()->record_collection_pause_start(sample_start_time_sec); |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4035 |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4036 double scan_wait_start = os::elapsedTime(); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4037 // 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
|
4038 // 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
|
4039 // 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
|
4040 // moving them during the GC. |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4041 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
|
4042 double wait_time_ms = 0.0; |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4043 if (waited) { |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4044 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
|
4045 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
|
4046 } |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4047 g1_policy()->phase_times()->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
|
4048 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4049 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4050 gclog_or_tty->print_cr("\nAfter recording pause start.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4051 _young_list->print(); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4052 #endif // YOUNG_LIST_VERBOSE |
| 342 | 4053 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4054 if (g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4055 concurrent_mark()->checkpointRootsInitialPre(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4056 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4057 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4058 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4059 gclog_or_tty->print_cr("\nBefore choosing collection set.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4060 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4061 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
|
4062 #endif // YOUNG_LIST_VERBOSE |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4063 |
| 10405 | 4064 g1_policy()->finalize_cset(target_pause_time_ms, evacuation_info); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4065 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4066 _cm->note_start_of_gc(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4067 // 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
|
4068 // 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
|
4069 // 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
|
4070 // ensure that the CSet has been finalized. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4071 _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
|
4072 true /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4073 false /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4074 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4075 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4076 if (_hr_printer.is_active()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4077 HeapRegion* hr = g1_policy()->collection_set(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4078 while (hr != NULL) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4079 G1HRPrinter::RegionType type; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4080 if (!hr->is_young()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4081 type = G1HRPrinter::Old; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4082 } else if (hr->is_survivor()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4083 type = G1HRPrinter::Survivor; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4084 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4085 type = G1HRPrinter::Eden; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4086 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4087 _hr_printer.cset(hr); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4088 hr = hr->next_in_collection_set(); |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4089 } |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4090 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4091 |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
4092 #ifdef ASSERT |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4093 VerifyCSetClosure cl; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4094 collection_set_iterate(&cl); |
|
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
4095 #endif // ASSERT |
| 1707 | 4096 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4097 setup_surviving_young_words(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4098 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4099 // Initialize the GC alloc regions. |
| 10405 | 4100 init_gc_alloc_regions(evacuation_info); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4101 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4102 // Actually do the work... |
| 10405 | 4103 evacuate_collection_set(evacuation_info); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4104 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4105 // 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
|
4106 // (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
|
4107 // 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
|
4108 // 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
|
4109 // we checked. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4110 _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
|
4111 false /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4112 true /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4113 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4114 |
| 10405 | 4115 free_collection_set(g1_policy()->collection_set(), evacuation_info); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4116 g1_policy()->clear_collection_set(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4117 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4118 cleanup_surviving_young_words(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4119 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4120 // Start a new incremental collection set for the next pause. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4121 g1_policy()->start_incremental_cset_building(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4122 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4123 clear_cset_fast_test(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4124 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4125 _young_list->reset_sampled_info(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4126 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4127 // Don't check the whole heap at this point as the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4128 // GC alloc regions from this pause have been tagged |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4129 // as survivors and moved on to the survivor list. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4130 // Survivor regions will fail the !is_young() check. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4131 assert(check_young_list_empty(false /* check_heap */), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4132 "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
|
4133 |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4134 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4135 gclog_or_tty->print_cr("Before recording survivors.\nYoung List:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4136 _young_list->print(); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4137 #endif // YOUNG_LIST_VERBOSE |
| 342 | 4138 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4139 g1_policy()->record_survivor_regions(_young_list->survivor_length(), |
| 10405 | 4140 _young_list->first_survivor_region(), |
| 4141 _young_list->last_survivor_region()); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4142 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4143 _young_list->reset_auxilary_lists(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4144 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4145 if (evacuation_failed()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4146 _summary_bytes_used = recalculate_used(); |
| 10405 | 4147 uint n_queues = MAX2((int)ParallelGCThreads, 1); |
| 4148 for (uint i = 0; i < n_queues; i++) { | |
| 4149 if (_evacuation_failed_info_array[i].has_failed()) { | |
| 4150 _gc_tracer_stw->report_evacuation_failed(_evacuation_failed_info_array[i]); | |
| 4151 } | |
| 4152 } | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4153 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4154 // The "used" of the the collection set have already been subtracted |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4155 // when they were freed. Add in the bytes evacuated. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4156 _summary_bytes_used += g1_policy()->bytes_copied_during_gc(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4157 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4158 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4159 if (g1_policy()->during_initial_mark_pause()) { |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4160 // 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
|
4161 // 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
|
4162 // appropriate initialization is done on the CM object. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4163 concurrent_mark()->checkpointRootsInitialPost(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4164 set_marking_started(); |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4165 // 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
|
4166 // 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
|
4167 // the current thread has completed its logging output. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4168 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4169 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4170 allocate_dummy_regions(); |
|
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
4171 |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4172 #if YOUNG_LIST_VERBOSE |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4173 gclog_or_tty->print_cr("\nEnd of the pause.\nYoung_list:"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4174 _young_list->print(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4175 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
|
4176 #endif // YOUNG_LIST_VERBOSE |
| 342 | 4177 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4178 init_mutator_alloc_region(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4179 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4180 { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4181 size_t expand_bytes = g1_policy()->expansion_amount(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4182 if (expand_bytes > 0) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4183 size_t bytes_before = capacity(); |
| 4785 | 4184 // No need for an ergo verbose message here, |
| 4185 // expansion_amount() does this when it returns a value > 0. | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4186 if (!expand(expand_bytes)) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4187 // We failed to expand the heap so let's verify that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4188 // committed/uncommitted amount match the backing store |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4189 assert(capacity() == _g1_storage.committed_size(), "committed size mismatch"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4190 assert(max_capacity() == _g1_storage.reserved_size(), "reserved size mismatch"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4191 } |
|
3920
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4192 } |
|
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4193 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4194 |
| 10405 | 4195 // We redo the verification but now wrt to the new CSet which |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4196 // 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
|
4197 _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
|
4198 true /* verify_enqueued_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4199 true /* verify_thread_buffers */, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4200 true /* verify_fingers */); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4201 _cm->note_end_of_gc(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4202 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4203 // 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
|
4204 // 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
|
4205 // 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
|
4206 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
|
4207 double pause_time_ms = (sample_end_time_sec - sample_start_time_sec) * MILLIUNITS; |
| 10405 | 4208 g1_policy()->record_collection_pause_end(pause_time_ms, evacuation_info); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4209 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4210 MemoryService::track_memory_usage(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4211 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4212 // 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
|
4213 // update buffers to bring the RSets up-to-date if |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4214 // G1HRRSFlushLogBuffersOnVerify has been set. While scanning |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4215 // 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
|
4216 // regions we just allocated to (i.e., the GC alloc |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4217 // regions). However, during the last GC we called |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4218 // set_saved_mark() on all the GC alloc regions, so card |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4219 // scanning might skip the [saved_mark_word()...top()] area of |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4220 // those regions (i.e., the area we allocated objects into |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4221 // during the last GC). But it shouldn't. Given that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4222 // saved_mark_word() is conditional on whether the GC time stamp |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4223 // 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
|
4224 // 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
|
4225 // regions and saved_mark_word() will simply return top() for |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4226 // 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
|
4227 // than iterating over the regions and fixing them. In fact, the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4228 // GC time stamp increment here also ensures that |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4229 // saved_mark_word() will return top() between pauses, i.e., |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4230 // during concurrent refinement. So we don't need the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4231 // is_gc_active() check to decided which top to use when |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4232 // scanning cards (see CR 7039627). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4233 increment_gc_time_stamp(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4234 |
|
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
4235 verify_after_gc(); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4236 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4237 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4238 ref_processor_stw()->verify_no_references_recorded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4239 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4240 // 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
|
4241 } |
|
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4242 |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4243 // 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
|
4244 // 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
|
4245 // 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
|
4246 // RETIRE events are generated before the end GC event. |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4247 _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
|
4248 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4249 if (mark_in_progress()) { |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4250 concurrent_mark()->update_g1_committed(); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4251 } |
|
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4252 |
|
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4253 #ifdef TRACESPINNING |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4254 ParallelTaskTerminator::print_termination_counts(); |
|
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4255 #endif |
| 342 | 4256 |
|
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4257 gc_epilogue(false); |
|
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4258 } |
|
6121
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4259 |
|
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
4260 // Print the remainder of the GC log output. |
|
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
4261 log_gc_footer(os::elapsedTime() - pause_start_sec); |
|
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
4262 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4263 // 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
|
4264 // 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
|
4265 // 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
|
4266 // logging output either. |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4267 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4268 _hrs.verify_optional(); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4269 verify_region_sets_optional(); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4270 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4271 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
|
4272 TASKQUEUE_STATS_ONLY(reset_taskqueue_stats()); |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4273 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4274 print_heap_after_gc(); |
| 10405 | 4275 trace_heap_after_gc(_gc_tracer_stw); |
|
6121
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4276 |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4277 // 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
|
4278 // 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
|
4279 // 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
|
4280 // before any GC notifications are raised. |
|
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4281 g1mm()->update_sizes(); |
| 10405 | 4282 |
| 4283 _gc_tracer_stw->report_evacuation_info(&evacuation_info); | |
| 4284 _gc_tracer_stw->report_tenuring_threshold(_g1_policy->tenuring_threshold()); | |
|
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
4285 _gc_timer_stw->register_gc_end(); |
| 10405 | 4286 _gc_tracer_stw->report_gc_end(_gc_timer_stw->gc_end(), _gc_timer_stw->time_partitions()); |
| 4287 } | |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4288 // 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
|
4289 // 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
|
4290 // that came from the pause. |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4291 |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4292 if (should_start_conc_mark) { |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4293 // CAUTION: after the doConcurrentMark() call below, |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4294 // the concurrent marking thread(s) could be running |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4295 // concurrently with us. Make sure that anything after |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4296 // 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
|
4297 // 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
|
4298 // not start until the safepoint itself is released in |
| 20192 | 4299 // SuspendibleThreadSet::desynchronize(). |
|
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4300 doConcurrentMark(); |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4301 } |
|
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4302 |
| 1973 | 4303 return true; |
| 342 | 4304 } |
| 4305 | |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4306 size_t G1CollectedHeap::desired_plab_sz(GCAllocPurpose purpose) |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4307 { |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4308 size_t gclab_word_size; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4309 switch (purpose) { |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4310 case GCAllocForSurvived: |
| 6595 | 4311 gclab_word_size = _survivor_plab_stats.desired_plab_sz(); |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4312 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4313 case GCAllocForTenured: |
| 6595 | 4314 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4315 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4316 default: |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4317 assert(false, "unknown GCAllocPurpose"); |
| 6595 | 4318 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4319 break; |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4320 } |
| 6595 | 4321 |
| 4322 // Prevent humongous PLAB sizes for two reasons: | |
| 4323 // * PLABs are allocated using a similar paths as oops, but should | |
| 4324 // never be in a humongous region | |
| 4325 // * Allowing humongous PLABs needlessly churns the region free lists | |
| 4326 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
|
4327 } |
|
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4328 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4329 void G1CollectedHeap::init_mutator_alloc_region() { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4330 assert(_mutator_alloc_region.get() == NULL, "pre-condition"); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4331 _mutator_alloc_region.init(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4332 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4333 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4334 void G1CollectedHeap::release_mutator_alloc_region() { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4335 _mutator_alloc_region.release(); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4336 assert(_mutator_alloc_region.get() == NULL, "post-condition"); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4337 } |
|
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4338 |
| 10405 | 4339 void G1CollectedHeap::init_gc_alloc_regions(EvacuationInfo& evacuation_info) { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4340 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
|
4341 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4342 _survivor_gc_alloc_region.init(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4343 _old_gc_alloc_region.init(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4344 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
|
4345 _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
|
4346 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4347 // 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
|
4348 // 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
|
4349 // 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
|
4350 // 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
|
4351 // 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
|
4352 // 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
|
4353 // during a cleanup and was added to the free list, but |
| 10405 | 4354 // has been subsequently used to allocate a humongous |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4355 // 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
|
4356 if (retained_region != NULL && |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4357 !retained_region->in_collection_set() && |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4358 !(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
|
4359 !retained_region->is_empty() && |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4360 !retained_region->isHumongous()) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4361 retained_region->set_saved_mark(); |
| 4072 | 4362 // The retained region was added to the old region set when it was |
| 4363 // retired. We have to remove it now, since we don't allow regions | |
| 4364 // we allocate to in the region sets. We'll re-add it later, when | |
| 4365 // it's retired again. | |
| 4366 _old_set.remove(retained_region); | |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4367 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
|
4368 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
|
4369 _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
|
4370 _hr_printer.reuse(retained_region); |
| 10405 | 4371 evacuation_info.set_alloc_regions_used_before(retained_region->used()); |
| 4372 } | |
| 4373 } | |
| 4374 | |
| 4375 void G1CollectedHeap::release_gc_alloc_regions(uint no_of_gc_workers, EvacuationInfo& evacuation_info) { | |
| 4376 evacuation_info.set_allocation_regions(_survivor_gc_alloc_region.count() + | |
| 4377 _old_gc_alloc_region.count()); | |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4378 _survivor_gc_alloc_region.release(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4379 // 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
|
4380 // _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
|
4381 // _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
|
4382 // 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
|
4383 // condition. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
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|
4384 _retained_old_gc_alloc_region = _old_gc_alloc_region.release(); |
| 6595 | 4385 |
| 4386 if (ResizePLAB) { | |
| 6819 | 4387 _survivor_plab_stats.adjust_desired_plab_sz(no_of_gc_workers); |
| 4388 _old_plab_stats.adjust_desired_plab_sz(no_of_gc_workers); | |
| 6595 | 4389 } |
| 342 | 4390 } |
| 4391 | |
|
3830
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|
4392 void G1CollectedHeap::abandon_gc_alloc_regions() { |
|
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|
4393 assert(_survivor_gc_alloc_region.get() == NULL, "pre-condition"); |
|
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|
4394 assert(_old_gc_alloc_region.get() == NULL, "pre-condition"); |
|
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|
4395 _retained_old_gc_alloc_region = NULL; |
| 342 | 4396 } |
| 4397 | |
| 4398 void G1CollectedHeap::init_for_evac_failure(OopsInHeapRegionClosure* cl) { | |
| 4399 _drain_in_progress = false; | |
| 4400 set_evac_failure_closure(cl); | |
| 6197 | 4401 _evac_failure_scan_stack = new (ResourceObj::C_HEAP, mtGC) GrowableArray<oop>(40, true); |
| 342 | 4402 } |
| 4403 | |
| 4404 void G1CollectedHeap::finalize_for_evac_failure() { | |
| 4405 assert(_evac_failure_scan_stack != NULL && | |
| 4406 _evac_failure_scan_stack->length() == 0, | |
| 4407 "Postcondition"); | |
| 4408 assert(!_drain_in_progress, "Postcondition"); | |
| 1045 | 4409 delete _evac_failure_scan_stack; |
| 342 | 4410 _evac_failure_scan_stack = NULL; |
| 4411 } | |
| 4412 | |
| 4413 void G1CollectedHeap::remove_self_forwarding_pointers() { | |
|
4783
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7121496: G1: do the per-region evacuation failure handling work in parallel
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|
4414 assert(check_cset_heap_region_claim_values(HeapRegion::InitialClaimValue), "sanity"); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
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|
4415 |
|
17757
eff02b5bd56c
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|
4416 double remove_self_forwards_start = os::elapsedTime(); |
|
eff02b5bd56c
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|
4417 |
|
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
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|
4418 G1ParRemoveSelfForwardPtrsTask rsfp_task(this); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
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|
4419 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
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|
4420 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
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|
4421 set_par_threads(); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
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|
4422 workers()->run_task(&rsfp_task); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
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|
4423 set_par_threads(0); |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
4424 } else { |
|
4783
023652e49ac0
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|
4425 rsfp_task.work(0); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
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parents:
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|
4426 } |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
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|
4427 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
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changeset
|
4428 assert(check_cset_heap_region_claim_values(HeapRegion::ParEvacFailureClaimValue), "sanity"); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
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|
4429 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
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changeset
|
4430 // Reset the claim values in the regions in the collection set. |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
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|
4431 reset_cset_heap_region_claim_values(); |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
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|
4432 |
|
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
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changeset
|
4433 assert(check_cset_heap_region_claim_values(HeapRegion::InitialClaimValue), "sanity"); |
| 342 | 4434 |
| 4435 // Now restore saved marks, if any. | |
|
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8002144: G1: large number of evacuation failures may lead to large c heap memory usage
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|
4436 assert(_objs_with_preserved_marks.size() == |
|
ad747ee9d0b1
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|
4437 _preserved_marks_of_objs.size(), "Both or none."); |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
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|
4438 while (!_objs_with_preserved_marks.is_empty()) { |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
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changeset
|
4439 oop obj = _objs_with_preserved_marks.pop(); |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
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|
4440 markOop m = _preserved_marks_of_objs.pop(); |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
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|
4441 obj->set_mark(m); |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
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|
4442 } |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
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|
4443 _objs_with_preserved_marks.clear(true); |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
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|
4444 _preserved_marks_of_objs.clear(true); |
|
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
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parents:
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|
4445 |
|
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
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changeset
|
4446 g1_policy()->phase_times()->record_evac_fail_remove_self_forwards((os::elapsedTime() - remove_self_forwards_start) * 1000.0); |
| 342 | 4447 } |
| 4448 | |
| 4449 void G1CollectedHeap::push_on_evac_failure_scan_stack(oop obj) { | |
| 4450 _evac_failure_scan_stack->push(obj); | |
| 4451 } | |
| 4452 | |
| 4453 void G1CollectedHeap::drain_evac_failure_scan_stack() { | |
| 4454 assert(_evac_failure_scan_stack != NULL, "precondition"); | |
| 4455 | |
| 4456 while (_evac_failure_scan_stack->length() > 0) { | |
| 4457 oop obj = _evac_failure_scan_stack->pop(); | |
| 4458 _evac_failure_closure->set_region(heap_region_containing(obj)); | |
| 4459 obj->oop_iterate_backwards(_evac_failure_closure); | |
| 4460 } | |
| 4461 } | |
| 4462 | |
| 4463 oop | |
| 10405 | 4464 G1CollectedHeap::handle_evacuation_failure_par(G1ParScanThreadState* _par_scan_state, |
|
4787
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6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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4785
diff
changeset
|
4465 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
|
4466 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
|
4467 err_msg("obj: "PTR_FORMAT" should still be in the CSet", |
|
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
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parents:
3317
diff
changeset
|
4468 (HeapWord*) old)); |
| 342 | 4469 markOop m = old->mark(); |
| 4470 oop forward_ptr = old->forward_to_atomic(old); | |
| 4471 if (forward_ptr == NULL) { | |
| 4472 // Forward-to-self succeeded. | |
| 10405 | 4473 assert(_par_scan_state != NULL, "par scan state"); |
| 4474 OopsInHeapRegionClosure* cl = _par_scan_state->evac_failure_closure(); | |
| 4475 uint queue_num = _par_scan_state->queue_num(); | |
| 4476 | |
| 4477 _evacuation_failed = true; | |
| 4478 _evacuation_failed_info_array[queue_num].register_copy_failure(old->size()); | |
| 342 | 4479 if (_evac_failure_closure != cl) { |
| 4480 MutexLockerEx x(EvacFailureStack_lock, Mutex::_no_safepoint_check_flag); | |
| 4481 assert(!_drain_in_progress, | |
| 4482 "Should only be true while someone holds the lock."); | |
| 4483 // Set the global evac-failure closure to the current thread's. | |
| 4484 assert(_evac_failure_closure == NULL, "Or locking has failed."); | |
| 4485 set_evac_failure_closure(cl); | |
| 4486 // Now do the common part. | |
| 4487 handle_evacuation_failure_common(old, m); | |
| 4488 // Reset to NULL. | |
| 4489 set_evac_failure_closure(NULL); | |
| 4490 } else { | |
| 4491 // The lock is already held, and this is recursive. | |
| 4492 assert(_drain_in_progress, "This should only be the recursive case."); | |
| 4493 handle_evacuation_failure_common(old, m); | |
| 4494 } | |
| 4495 return old; | |
| 4496 } 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
|
4497 // 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
|
4498 // 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
|
4499 // 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
|
4500 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
|
4501 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
|
4502 "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
|
4503 (HeapWord*) old, (HeapWord*) forward_ptr)); |
| 342 | 4504 return forward_ptr; |
| 4505 } | |
| 4506 } | |
| 4507 | |
| 4508 void G1CollectedHeap::handle_evacuation_failure_common(oop old, markOop m) { | |
| 4509 preserve_mark_if_necessary(old, m); | |
| 4510 | |
| 4511 HeapRegion* r = heap_region_containing(old); | |
| 4512 if (!r->evacuation_failed()) { | |
| 4513 r->set_evacuation_failed(true); | |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4514 _hr_printer.evac_failure(r); |
| 342 | 4515 } |
| 4516 | |
| 4517 push_on_evac_failure_scan_stack(old); | |
| 4518 | |
| 4519 if (!_drain_in_progress) { | |
| 4520 // prevent recursion in copy_to_survivor_space() | |
| 4521 _drain_in_progress = true; | |
| 4522 drain_evac_failure_scan_stack(); | |
| 4523 _drain_in_progress = false; | |
| 4524 } | |
| 4525 } | |
| 4526 | |
| 4527 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
|
4528 assert(evacuation_failed(), "Oversaving!"); |
|
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4529 // 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
|
4530 // case of a promotion failure. |
|
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4531 if (m->must_be_preserved_for_promotion_failure(obj)) { |
|
8038
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4532 _objs_with_preserved_marks.push(obj); |
|
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4533 _preserved_marks_of_objs.push(m); |
| 342 | 4534 } |
| 4535 } | |
| 4536 | |
| 4537 HeapWord* G1CollectedHeap::par_allocate_during_gc(GCAllocPurpose purpose, | |
| 4538 size_t word_size) { | |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4539 if (purpose == GCAllocForSurvived) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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parents:
3824
diff
changeset
|
4540 HeapWord* result = survivor_attempt_allocation(word_size); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
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3824
diff
changeset
|
4541 if (result != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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diff
changeset
|
4542 return result; |
| 342 | 4543 } else { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
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3824
diff
changeset
|
4544 // 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
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diff
changeset
|
4545 // object there. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
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3824
diff
changeset
|
4546 return old_attempt_allocation(word_size); |
| 342 | 4547 } |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
diff
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|
4548 } else { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
diff
changeset
|
4549 assert(purpose == GCAllocForTenured, "sanity"); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
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3824
diff
changeset
|
4550 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
|
4551 if (result != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
diff
changeset
|
4552 return result; |
| 342 | 4553 } else { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
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3824
diff
changeset
|
4554 // 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
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3824
diff
changeset
|
4555 // object there. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
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3824
diff
changeset
|
4556 return survivor_attempt_allocation(word_size); |
| 342 | 4557 } |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
diff
changeset
|
4558 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
diff
changeset
|
4559 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
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3824
diff
changeset
|
4560 ShouldNotReachHere(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
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3824
diff
changeset
|
4561 // Trying to keep some compilers happy. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
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3824
diff
changeset
|
4562 return NULL; |
| 342 | 4563 } |
| 4564 | |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4565 G1ParGCAllocBuffer::G1ParGCAllocBuffer(size_t gclab_word_size) : |
|
20215
983092f35ff7
8028710: G1 does not retire allocation buffers after reference processing work
tschatzl
parents:
20212
diff
changeset
|
4566 ParGCAllocBuffer(gclab_word_size), _retired(true) { } |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4567 |
|
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4568 void G1ParCopyHelper::mark_object(oop obj) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
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4785
diff
changeset
|
4569 #ifdef ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
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4785
diff
changeset
|
4570 HeapRegion* hr = _g1->heap_region_containing(obj); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
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4785
diff
changeset
|
4571 assert(hr != NULL, "sanity"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
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4785
diff
changeset
|
4572 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
|
4573 #endif // ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4574 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
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4785
diff
changeset
|
4575 // We know that the object is not moving so it's safe to read its size. |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4576 _cm->grayRoot(obj, (size_t) obj->size(), _worker_id); |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4577 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4578 |
|
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4579 void G1ParCopyHelper::mark_forwarded_object(oop from_obj, oop to_obj) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4580 #ifdef ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4581 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
|
4582 assert(from_obj->forwardee() == to_obj, "to obj should be the forwardee"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4583 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
|
4584 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4585 HeapRegion* from_hr = _g1->heap_region_containing(from_obj); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4586 assert(from_hr != NULL, "sanity"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4587 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
|
4588 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4589 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
|
4590 assert(to_hr != NULL, "sanity"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4591 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
|
4592 #endif // ASSERT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4593 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4594 // 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
|
4595 // 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
|
4596 // 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
|
4597 // image which we know should not be changing. |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4598 _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
|
4599 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4600 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4601 template <class T> |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4602 void G1ParCopyHelper::do_klass_barrier(T* p, oop new_obj) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4603 if (_g1->heap_region_containing_raw(new_obj)->is_young()) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4604 _scanned_klass->record_modified_oops(); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4605 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4606 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4607 |
|
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4608 template <G1Barrier barrier, bool do_mark_object> |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4609 template <class T> |
|
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4610 void G1ParCopyClosure<barrier, do_mark_object>::do_oop_work(T* p) { |
|
17688
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4611 T heap_oop = oopDesc::load_heap_oop(p); |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4612 |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4613 if (oopDesc::is_null(heap_oop)) { |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4614 return; |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4615 } |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4616 |
|
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4617 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4618 |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
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
parents:
4834
diff
changeset
|
4620 |
|
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
4621 if (_g1->in_cset_fast_test(obj)) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4622 oop forwardee; |
| 526 | 4623 if (obj->is_forwarded()) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4624 forwardee = obj->forwardee(); |
| 526 | 4625 } else { |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4626 forwardee = _par_scan_state->copy_to_survivor_space(obj); |
| 342 | 4627 } |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4628 assert(forwardee != NULL, "forwardee should not be NULL"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4629 oopDesc::encode_store_heap_oop(p, forwardee); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4630 if (do_mark_object && forwardee != obj) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4631 // If the object is self-forwarded we don't need to explicitly |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4632 // mark it, the evacuation failure protocol will do so. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4633 mark_forwarded_object(obj, forwardee); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4634 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4635 |
|
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4636 if (barrier == G1BarrierKlass) { |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4637 do_klass_barrier(p, forwardee); |
| 342 | 4638 } |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4639 } else { |
|
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4640 // 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
|
4641 // 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
|
4642 // be true) then attempt to mark the object. |
|
17688
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4643 if (do_mark_object) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4644 mark_object(obj); |
|
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4645 } |
| 526 | 4646 } |
| 4647 | |
|
17688
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4648 if (barrier == G1BarrierEvac) { |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4649 _par_scan_state->update_rs(_from, p, _worker_id); |
| 526 | 4650 } |
|
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4651 } |
|
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4652 |
|
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4653 template void G1ParCopyClosure<G1BarrierEvac, false>::do_oop_work(oop* p); |
|
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4654 template void G1ParCopyClosure<G1BarrierEvac, false>::do_oop_work(narrowOop* p); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4655 |
| 342 | 4656 class G1ParEvacuateFollowersClosure : public VoidClosure { |
| 4657 protected: | |
| 4658 G1CollectedHeap* _g1h; | |
| 4659 G1ParScanThreadState* _par_scan_state; | |
| 4660 RefToScanQueueSet* _queues; | |
| 4661 ParallelTaskTerminator* _terminator; | |
| 4662 | |
| 4663 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } | |
| 4664 RefToScanQueueSet* queues() { return _queues; } | |
| 4665 ParallelTaskTerminator* terminator() { return _terminator; } | |
| 4666 | |
| 4667 public: | |
| 4668 G1ParEvacuateFollowersClosure(G1CollectedHeap* g1h, | |
| 4669 G1ParScanThreadState* par_scan_state, | |
| 4670 RefToScanQueueSet* queues, | |
| 4671 ParallelTaskTerminator* terminator) | |
| 4672 : _g1h(g1h), _par_scan_state(par_scan_state), | |
| 4673 _queues(queues), _terminator(terminator) {} | |
| 4674 | |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4675 void do_void(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4676 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4677 private: |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4678 inline bool offer_termination(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4679 }; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4680 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4681 bool G1ParEvacuateFollowersClosure::offer_termination() { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4682 G1ParScanThreadState* const pss = par_scan_state(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4683 pss->start_term_time(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4684 const bool res = terminator()->offer_termination(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4685 pss->end_term_time(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4686 return res; |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4687 } |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4688 |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4689 void G1ParEvacuateFollowersClosure::do_void() { |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4690 G1ParScanThreadState* const pss = par_scan_state(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4691 pss->trim_queue(); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4692 do { |
|
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
4693 pss->steal_and_trim_queue(queues()); |
|
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4694 } while (!offer_termination()); |
|
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4695 } |
| 342 | 4696 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4697 class G1KlassScanClosure : public KlassClosure { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4698 G1ParCopyHelper* _closure; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4699 bool _process_only_dirty; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4700 int _count; |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4701 public: |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4702 G1KlassScanClosure(G1ParCopyHelper* closure, bool process_only_dirty) |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4703 : _process_only_dirty(process_only_dirty), _closure(closure), _count(0) {} |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4704 void do_klass(Klass* klass) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4705 // If the klass has not been dirtied we know that there's |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4706 // no references into the young gen and we can skip it. |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4707 if (!_process_only_dirty || klass->has_modified_oops()) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4708 // Clean the klass since we're going to scavenge all the metadata. |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4709 klass->clear_modified_oops(); |
|
da91efe96a93
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6629
diff
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|
4710 |
|
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6964458: Reimplement class meta-data storage to use native memory
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changeset
|
4711 // Tell the closure that this klass is the Klass to scavenge |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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6629
diff
changeset
|
4712 // and is the one to dirty if oops are left pointing into the young gen. |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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6629
diff
changeset
|
4713 _closure->set_scanned_klass(klass); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
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|
4714 |
|
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6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
4715 klass->oops_do(_closure); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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6629
diff
changeset
|
4716 |
|
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6964458: Reimplement class meta-data storage to use native memory
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changeset
|
4717 _closure->set_scanned_klass(NULL); |
|
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6964458: Reimplement class meta-data storage to use native memory
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6629
diff
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|
4718 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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6629
diff
changeset
|
4719 _count++; |
|
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6964458: Reimplement class meta-data storage to use native memory
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6629
diff
changeset
|
4720 } |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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6629
diff
changeset
|
4721 }; |
|
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|
4722 |
| 342 | 4723 class G1ParTask : public AbstractGangTask { |
| 4724 protected: | |
| 4725 G1CollectedHeap* _g1h; | |
| 4726 RefToScanQueueSet *_queues; | |
| 4727 ParallelTaskTerminator _terminator; | |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
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4711
diff
changeset
|
4728 uint _n_workers; |
| 342 | 4729 |
| 4730 Mutex _stats_lock; | |
| 4731 Mutex* stats_lock() { return &_stats_lock; } | |
| 4732 | |
| 4733 size_t getNCards() { | |
| 4734 return (_g1h->capacity() + G1BlockOffsetSharedArray::N_bytes - 1) | |
| 4735 / G1BlockOffsetSharedArray::N_bytes; | |
| 4736 } | |
| 4737 | |
| 4738 public: | |
|
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
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|
4739 G1ParTask(G1CollectedHeap* g1h, RefToScanQueueSet *task_queues) |
| 342 | 4740 : AbstractGangTask("G1 collection"), |
| 4741 _g1h(g1h), | |
| 4742 _queues(task_queues), | |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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diff
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|
4743 _terminator(0, _queues), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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diff
changeset
|
4744 _stats_lock(Mutex::leaf, "parallel G1 stats lock", true) |
| 342 | 4745 {} |
| 4746 | |
| 4747 RefToScanQueueSet* queues() { return _queues; } | |
| 4748 | |
| 4749 RefToScanQueue *work_queue(int i) { | |
| 4750 return queues()->queue(i); | |
| 4751 } | |
| 4752 | |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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diff
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|
4753 ParallelTaskTerminator* terminator() { return &_terminator; } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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|
4754 |
|
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4090
diff
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|
4755 virtual void set_for_termination(int active_workers) { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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diff
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|
4756 // This task calls set_n_termination() in par_non_clean_card_iterate_work() |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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diff
changeset
|
4757 // in the young space (_par_seq_tasks) in the G1 heap |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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diff
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|
4758 // for SequentialSubTasksDone. |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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diff
changeset
|
4759 // This task also uses SubTasksDone in SharedHeap and G1CollectedHeap |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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4090
diff
changeset
|
4760 // both of which need setting by set_n_termination(). |
|
bca17e38de00
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jmasa
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diff
changeset
|
4761 _g1h->SharedHeap::set_n_termination(active_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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diff
changeset
|
4762 _g1h->set_n_termination(active_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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4090
diff
changeset
|
4763 terminator()->reset_for_reuse(active_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
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|
4764 _n_workers = active_workers; |
|
bca17e38de00
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4090
diff
changeset
|
4765 } |
|
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diff
changeset
|
4766 |
|
4728
441e946dc1af
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4711
diff
changeset
|
4767 void work(uint worker_id) { |
|
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7121618: Change type of number of GC workers to unsigned int.
jmasa
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4711
diff
changeset
|
4768 if (worker_id >= _n_workers) return; // no work needed this round |
| 1611 | 4769 |
| 4770 double start_time_ms = os::elapsedTime() * 1000.0; | |
|
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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|
4771 _g1h->g1_policy()->phase_times()->record_gc_worker_start_time(worker_id, start_time_ms); |
| 1611 | 4772 |
|
5986
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|
4773 { |
|
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5963
diff
changeset
|
4774 ResourceMark rm; |
|
500023bd0818
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parents:
5963
diff
changeset
|
4775 HandleMark hm; |
|
500023bd0818
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5963
diff
changeset
|
4776 |
|
500023bd0818
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diff
changeset
|
4777 ReferenceProcessor* rp = _g1h->ref_processor_stw(); |
|
500023bd0818
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parents:
5963
diff
changeset
|
4778 |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4779 G1ParScanThreadState pss(_g1h, worker_id, rp); |
|
5986
500023bd0818
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parents:
5963
diff
changeset
|
4780 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, rp); |
|
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
4781 |
|
5986
500023bd0818
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5963
diff
changeset
|
4782 pss.set_evac_failure_closure(&evac_failure_cl); |
|
500023bd0818
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parents:
5963
diff
changeset
|
4783 |
|
500023bd0818
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parents:
5963
diff
changeset
|
4784 G1ParScanExtRootClosure only_scan_root_cl(_g1h, &pss, rp); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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changeset
|
4785 G1ParScanMetadataClosure only_scan_metadata_cl(_g1h, &pss, rp); |
|
5986
500023bd0818
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parents:
5963
diff
changeset
|
4786 |
|
500023bd0818
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parents:
5963
diff
changeset
|
4787 G1ParScanAndMarkExtRootClosure scan_mark_root_cl(_g1h, &pss, rp); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4788 G1ParScanAndMarkMetadataClosure scan_mark_metadata_cl(_g1h, &pss, rp); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
changeset
|
4789 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4790 bool only_young = _g1h->g1_policy()->gcs_are_young(); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
changeset
|
4791 G1KlassScanClosure scan_mark_klasses_cl_s(&scan_mark_metadata_cl, false); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4792 G1KlassScanClosure only_scan_klasses_cl_s(&only_scan_metadata_cl, only_young); |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4793 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4794 OopClosure* scan_root_cl = &only_scan_root_cl; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4795 G1KlassScanClosure* scan_klasses_cl = &only_scan_klasses_cl_s; |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4796 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4797 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4798 // We also need to mark copied objects. |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4799 scan_root_cl = &scan_mark_root_cl; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4800 scan_klasses_cl = &scan_mark_klasses_cl_s; |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4801 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4802 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4803 G1ParPushHeapRSClosure push_heap_rs_cl(_g1h, &pss); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4804 |
| 12080 | 4805 // Don't scan the scavengable methods in the code cache as part |
| 4806 // of strong root scanning. The code roots that point into a | |
| 4807 // region in the collection set are scanned when we scan the | |
| 4808 // region's RSet. | |
| 4809 int so = SharedHeap::SO_AllClasses | SharedHeap::SO_Strings; | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4810 |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4811 pss.start_strong_roots(); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4812 _g1h->g1_process_strong_roots(/* is scavenging */ true, |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4813 SharedHeap::ScanningOption(so), |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4814 scan_root_cl, |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4815 &push_heap_rs_cl, |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
changeset
|
4816 scan_klasses_cl, |
|
5986
500023bd0818
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parents:
5963
diff
changeset
|
4817 worker_id); |
|
500023bd0818
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parents:
5963
diff
changeset
|
4818 pss.end_strong_roots(); |
|
500023bd0818
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5963
diff
changeset
|
4819 |
|
500023bd0818
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5963
diff
changeset
|
4820 { |
|
500023bd0818
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5963
diff
changeset
|
4821 double start = os::elapsedTime(); |
|
500023bd0818
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5963
diff
changeset
|
4822 G1ParEvacuateFollowersClosure evac(_g1h, &pss, _queues, &_terminator); |
|
500023bd0818
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5963
diff
changeset
|
4823 evac.do_void(); |
|
500023bd0818
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parents:
5963
diff
changeset
|
4824 double elapsed_ms = (os::elapsedTime()-start)*1000.0; |
|
500023bd0818
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parents:
5963
diff
changeset
|
4825 double term_ms = pss.term_time()*1000.0; |
|
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
4826 _g1h->g1_policy()->phase_times()->add_obj_copy_time(worker_id, elapsed_ms-term_ms); |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4827 _g1h->g1_policy()->phase_times()->record_termination(worker_id, term_ms, pss.term_attempts()); |
|
5986
500023bd0818
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5963
diff
changeset
|
4828 } |
|
500023bd0818
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parents:
5963
diff
changeset
|
4829 _g1h->g1_policy()->record_thread_age_table(pss.age_table()); |
|
500023bd0818
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johnc
parents:
5963
diff
changeset
|
4830 _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
|
4831 |
|
500023bd0818
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parents:
5963
diff
changeset
|
4832 if (ParallelGCVerbose) { |
|
500023bd0818
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parents:
5963
diff
changeset
|
4833 MutexLocker x(stats_lock()); |
|
500023bd0818
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parents:
5963
diff
changeset
|
4834 pss.print_termination_stats(worker_id); |
|
500023bd0818
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parents:
5963
diff
changeset
|
4835 } |
|
500023bd0818
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5963
diff
changeset
|
4836 |
|
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
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20223
diff
changeset
|
4837 assert(pss.queue_is_empty(), "should be empty"); |
|
5986
500023bd0818
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parents:
5963
diff
changeset
|
4838 |
|
500023bd0818
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parents:
5963
diff
changeset
|
4839 // Close the inner scope so that the ResourceMark and HandleMark |
|
500023bd0818
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parents:
5963
diff
changeset
|
4840 // destructors are executed here and are included as part of the |
|
500023bd0818
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parents:
5963
diff
changeset
|
4841 // "GC Worker Time". |
| 342 | 4842 } |
| 4843 | |
| 1611 | 4844 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
|
4845 _g1h->g1_policy()->phase_times()->record_gc_worker_end_time(worker_id, end_time_ms); |
| 342 | 4846 } |
| 4847 }; | |
| 4848 | |
| 4849 // *** Common G1 Evacuation Stuff | |
| 4850 | |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
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1755
diff
changeset
|
4851 // This method is run in a GC worker. |
|
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
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1755
diff
changeset
|
4852 |
| 342 | 4853 void |
| 4854 G1CollectedHeap:: | |
|
6725
da91efe96a93
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coleenp
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6629
diff
changeset
|
4855 g1_process_strong_roots(bool is_scavenging, |
|
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
4856 ScanningOption so, |
| 342 | 4857 OopClosure* scan_non_heap_roots, |
| 4858 OopsInHeapRegionClosure* scan_rs, | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4859 G1KlassScanClosure* scan_klasses, |
|
17844
8847586c9037
8016302: Change type of the number of GC workers to unsigned int (2)
vkempik
parents:
17833
diff
changeset
|
4860 uint worker_i) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4861 |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4862 // First scan the strong roots |
| 342 | 4863 double ext_roots_start = os::elapsedTime(); |
| 4864 double closure_app_time_sec = 0.0; | |
| 4865 | |
| 4866 BufferingOopClosure buf_scan_non_heap_roots(scan_non_heap_roots); | |
| 4867 | |
|
20256
b0b97602393a
8033923: Use BufferingOopClosure for G1 code root scanning
stefank
parents:
20254
diff
changeset
|
4868 CodeBlobToOopClosure scan_code_roots(&buf_scan_non_heap_roots, true /* do_marking */); |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
4869 |
|
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
4870 process_strong_roots(false, // no scoping; this is parallel code |
|
20254
9fec19bb0659
8032379: Remove the is_scavenging flag to process_strong_roots
mgerdin
parents:
20224
diff
changeset
|
4871 so, |
| 342 | 4872 &buf_scan_non_heap_roots, |
|
20256
b0b97602393a
8033923: Use BufferingOopClosure for G1 code root scanning
stefank
parents:
20254
diff
changeset
|
4873 &scan_code_roots, |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4874 scan_klasses |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4875 ); |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4876 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4877 // 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
|
4878 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
|
4879 // We need to treat the discovered reference lists of the |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4880 // concurrent mark ref processor as roots and keep entries |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4881 // (which are added by the marking threads) on them live |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4882 // until they can be processed at the end of marking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4883 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
|
4884 } |
|
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
4885 |
|
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
4886 // Finish up any enqueued closure apps (attributed as object copy time). |
| 342 | 4887 buf_scan_non_heap_roots.done(); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4888 |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4889 double obj_copy_time_sec = buf_scan_non_heap_roots.closure_app_seconds(); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4890 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4891 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
|
4892 |
| 342 | 4893 double ext_root_time_ms = |
|
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
4894 ((os::elapsedTime() - ext_roots_start) - obj_copy_time_sec) * 1000.0; |
|
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
4895 |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4896 g1_policy()->phase_times()->record_ext_root_scan_time(worker_i, ext_root_time_ms); |
| 342 | 4897 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4898 // 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
|
4899 // 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
|
4900 // as implicitly live). |
|
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
4901 double satb_filtering_ms = 0.0; |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4902 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
|
4903 if (mark_in_progress()) { |
|
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
4904 double satb_filter_start = os::elapsedTime(); |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
4905 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4906 JavaThread::satb_mark_queue_set().filter_thread_buffers(); |
|
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
4907 |
|
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
4908 satb_filtering_ms = (os::elapsedTime() - satb_filter_start) * 1000.0; |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4909 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4910 } |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4911 g1_policy()->phase_times()->record_satb_filtering_time(worker_i, satb_filtering_ms); |
| 342 | 4912 |
| 12080 | 4913 // If this is an initial mark pause, and we're not scanning |
| 4914 // the entire code cache, we need to mark the oops in the | |
| 4915 // strong code root lists for the regions that are not in | |
| 4916 // the collection set. | |
| 4917 // Note all threads participate in this set of root tasks. | |
| 4918 double mark_strong_code_roots_ms = 0.0; | |
|
20254
9fec19bb0659
8032379: Remove the is_scavenging flag to process_strong_roots
mgerdin
parents:
20224
diff
changeset
|
4919 if (g1_policy()->during_initial_mark_pause() && !(so & SO_AllCodeCache)) { |
| 12080 | 4920 double mark_strong_roots_start = os::elapsedTime(); |
| 4921 mark_strong_code_roots(worker_i); | |
| 4922 mark_strong_code_roots_ms = (os::elapsedTime() - mark_strong_roots_start) * 1000.0; | |
| 4923 } | |
| 4924 g1_policy()->phase_times()->record_strong_code_root_mark_time(worker_i, mark_strong_code_roots_ms); | |
| 4925 | |
| 342 | 4926 // Now scan the complement of the collection set. |
|
20256
b0b97602393a
8033923: Use BufferingOopClosure for G1 code root scanning
stefank
parents:
20254
diff
changeset
|
4927 CodeBlobToOopClosure eager_scan_code_roots(scan_non_heap_roots, true /* do_marking */); |
|
b0b97602393a
8033923: Use BufferingOopClosure for G1 code root scanning
stefank
parents:
20254
diff
changeset
|
4928 g1_rem_set()->oops_into_collection_set_do(scan_rs, &eager_scan_code_roots, worker_i); |
|
b0b97602393a
8033923: Use BufferingOopClosure for G1 code root scanning
stefank
parents:
20254
diff
changeset
|
4929 |
| 342 | 4930 _process_strong_tasks->all_tasks_completed(); |
| 4931 } | |
| 4932 | |
| 4933 void | |
|
10179
a08c80e9e1e5
8012687: Remove unused is_root checks and closures
stefank
parents:
10099
diff
changeset
|
4934 G1CollectedHeap::g1_process_weak_roots(OopClosure* root_closure) { |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
4935 CodeBlobToOopClosure roots_in_blobs(root_closure, /*do_marking=*/ false); |
|
10179
a08c80e9e1e5
8012687: Remove unused is_root checks and closures
stefank
parents:
10099
diff
changeset
|
4936 SharedHeap::process_weak_roots(root_closure, &roots_in_blobs); |
| 342 | 4937 } |
| 4938 | |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4939 class G1StringSymbolTableUnlinkTask : public AbstractGangTask { |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4940 private: |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4941 BoolObjectClosure* _is_alive; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4942 int _initial_string_table_size; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4943 int _initial_symbol_table_size; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4944 |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4945 bool _process_strings; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4946 int _strings_processed; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4947 int _strings_removed; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4948 |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4949 bool _process_symbols; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4950 int _symbols_processed; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4951 int _symbols_removed; |
|
17652
0eb64cfc0b76
8033443: Test8000311 fails after latest changes to parallelize string and symbol table unlink
tschatzl
parents:
17651
diff
changeset
|
4952 |
|
0eb64cfc0b76
8033443: Test8000311 fails after latest changes to parallelize string and symbol table unlink
tschatzl
parents:
17651
diff
changeset
|
4953 bool _do_in_parallel; |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4954 public: |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4955 G1StringSymbolTableUnlinkTask(BoolObjectClosure* is_alive, bool process_strings, bool process_symbols) : |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4956 AbstractGangTask("Par String/Symbol table unlink"), _is_alive(is_alive), |
|
17652
0eb64cfc0b76
8033443: Test8000311 fails after latest changes to parallelize string and symbol table unlink
tschatzl
parents:
17651
diff
changeset
|
4957 _do_in_parallel(G1CollectedHeap::use_parallel_gc_threads()), |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4958 _process_strings(process_strings), _strings_processed(0), _strings_removed(0), |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4959 _process_symbols(process_symbols), _symbols_processed(0), _symbols_removed(0) { |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4960 |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4961 _initial_string_table_size = StringTable::the_table()->table_size(); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4962 _initial_symbol_table_size = SymbolTable::the_table()->table_size(); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4963 if (process_strings) { |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4964 StringTable::clear_parallel_claimed_index(); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4965 } |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4966 if (process_symbols) { |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4967 SymbolTable::clear_parallel_claimed_index(); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4968 } |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4969 } |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4970 |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4971 ~G1StringSymbolTableUnlinkTask() { |
|
17652
0eb64cfc0b76
8033443: Test8000311 fails after latest changes to parallelize string and symbol table unlink
tschatzl
parents:
17651
diff
changeset
|
4972 guarantee(!_process_strings || !_do_in_parallel || StringTable::parallel_claimed_index() >= _initial_string_table_size, |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4973 err_msg("claim value "INT32_FORMAT" after unlink less than initial string table size "INT32_FORMAT, |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4974 StringTable::parallel_claimed_index(), _initial_string_table_size)); |
|
17652
0eb64cfc0b76
8033443: Test8000311 fails after latest changes to parallelize string and symbol table unlink
tschatzl
parents:
17651
diff
changeset
|
4975 guarantee(!_process_symbols || !_do_in_parallel || SymbolTable::parallel_claimed_index() >= _initial_symbol_table_size, |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4976 err_msg("claim value "INT32_FORMAT" after unlink less than initial symbol table size "INT32_FORMAT, |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4977 SymbolTable::parallel_claimed_index(), _initial_symbol_table_size)); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4978 } |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4979 |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4980 void work(uint worker_id) { |
|
17652
0eb64cfc0b76
8033443: Test8000311 fails after latest changes to parallelize string and symbol table unlink
tschatzl
parents:
17651
diff
changeset
|
4981 if (_do_in_parallel) { |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4982 int strings_processed = 0; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4983 int strings_removed = 0; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4984 int symbols_processed = 0; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4985 int symbols_removed = 0; |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4986 if (_process_strings) { |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4987 StringTable::possibly_parallel_unlink(_is_alive, &strings_processed, &strings_removed); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4988 Atomic::add(strings_processed, &_strings_processed); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4989 Atomic::add(strings_removed, &_strings_removed); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4990 } |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4991 if (_process_symbols) { |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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changeset
|
4992 SymbolTable::possibly_parallel_unlink(&symbols_processed, &symbols_removed); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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changeset
|
4993 Atomic::add(symbols_processed, &_symbols_processed); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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|
4994 Atomic::add(symbols_removed, &_symbols_removed); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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|
4995 } |
|
5a32d2a3cc1e
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|
4996 } else { |
|
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
4997 if (_process_strings) { |
|
5a32d2a3cc1e
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tschatzl
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|
4998 StringTable::unlink(_is_alive, &_strings_processed, &_strings_removed); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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|
4999 } |
|
5a32d2a3cc1e
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tschatzl
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13400
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|
5000 if (_process_symbols) { |
|
5a32d2a3cc1e
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tschatzl
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changeset
|
5001 SymbolTable::unlink(&_symbols_processed, &_symbols_removed); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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|
5002 } |
|
5a32d2a3cc1e
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|
5003 } |
|
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diff
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|
5004 } |
|
5a32d2a3cc1e
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changeset
|
5005 |
|
5a32d2a3cc1e
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|
5006 size_t strings_processed() const { return (size_t)_strings_processed; } |
|
5a32d2a3cc1e
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|
5007 size_t strings_removed() const { return (size_t)_strings_removed; } |
|
5a32d2a3cc1e
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|
5008 |
|
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|
5009 size_t symbols_processed() const { return (size_t)_symbols_processed; } |
|
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|
5010 size_t symbols_removed() const { return (size_t)_symbols_removed; } |
|
5a32d2a3cc1e
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|
5011 }; |
|
5a32d2a3cc1e
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|
5012 |
|
5a32d2a3cc1e
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changeset
|
5013 void G1CollectedHeap::unlink_string_and_symbol_table(BoolObjectClosure* is_alive, |
|
5a32d2a3cc1e
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|
5014 bool process_strings, bool process_symbols) { |
|
5a32d2a3cc1e
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|
5015 uint n_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
|
5a32d2a3cc1e
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|
5016 _g1h->workers()->active_workers() : 1); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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|
5017 |
|
5a32d2a3cc1e
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tschatzl
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changeset
|
5018 G1StringSymbolTableUnlinkTask g1_unlink_task(is_alive, process_strings, process_symbols); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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|
5019 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
5a32d2a3cc1e
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|
5020 set_par_threads(n_workers); |
|
5a32d2a3cc1e
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|
5021 workers()->run_task(&g1_unlink_task); |
|
5a32d2a3cc1e
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|
5022 set_par_threads(0); |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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parents:
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|
5023 } else { |
|
5a32d2a3cc1e
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changeset
|
5024 g1_unlink_task.work(0); |
|
5a32d2a3cc1e
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parents:
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changeset
|
5025 } |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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parents:
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diff
changeset
|
5026 if (G1TraceStringSymbolTableScrubbing) { |
|
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
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changeset
|
5027 gclog_or_tty->print_cr("Cleaned string and symbol table, " |
|
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
5028 "strings: "SIZE_FORMAT" processed, "SIZE_FORMAT" removed, " |
|
5a32d2a3cc1e
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tschatzl
parents:
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diff
changeset
|
5029 "symbols: "SIZE_FORMAT" processed, "SIZE_FORMAT" removed", |
|
5a32d2a3cc1e
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tschatzl
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changeset
|
5030 g1_unlink_task.strings_processed(), g1_unlink_task.strings_removed(), |
|
5a32d2a3cc1e
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tschatzl
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|
5031 g1_unlink_task.symbols_processed(), g1_unlink_task.symbols_removed()); |
|
5a32d2a3cc1e
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tschatzl
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changeset
|
5032 } |
| 17764 | 5033 |
| 5034 if (G1StringDedup::is_enabled()) { | |
| 5035 G1StringDedup::unlink(is_alive); | |
| 5036 } | |
|
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
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diff
changeset
|
5037 } |
|
5a32d2a3cc1e
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parents:
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diff
changeset
|
5038 |
|
20216
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5039 class G1RedirtyLoggedCardsTask : public AbstractGangTask { |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
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diff
changeset
|
5040 private: |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
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diff
changeset
|
5041 DirtyCardQueueSet* _queue; |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5042 public: |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5043 G1RedirtyLoggedCardsTask(DirtyCardQueueSet* queue) : AbstractGangTask("Redirty Cards"), _queue(queue) { } |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
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20215
diff
changeset
|
5044 |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5045 virtual void work(uint worker_id) { |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5046 double start_time = os::elapsedTime(); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5047 |
|
20217
6b52700a896b
8040002: Clean up code and code duplication in re-diryting cards for verification
tschatzl
parents:
20216
diff
changeset
|
5048 RedirtyLoggedCardTableEntryClosure cl; |
|
20216
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5049 if (G1CollectedHeap::heap()->use_parallel_gc_threads()) { |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5050 _queue->par_apply_closure_to_all_completed_buffers(&cl); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5051 } else { |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5052 _queue->apply_closure_to_all_completed_buffers(&cl); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5053 } |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5054 |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5055 G1GCPhaseTimes* timer = G1CollectedHeap::heap()->g1_policy()->phase_times(); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5056 timer->record_redirty_logged_cards_time_ms(worker_id, (os::elapsedTime() - start_time) * 1000.0); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5057 timer->record_redirty_logged_cards_processed_cards(worker_id, cl.num_processed()); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5058 } |
|
17756
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5059 }; |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5060 |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5061 void G1CollectedHeap::redirty_logged_cards() { |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5062 guarantee(G1DeferredRSUpdate, "Must only be called when using deferred RS updates."); |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5063 double redirty_logged_cards_start = os::elapsedTime(); |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5064 |
|
20216
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5065 uint n_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5066 _g1h->workers()->active_workers() : 1); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5067 |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5068 G1RedirtyLoggedCardsTask redirty_task(&dirty_card_queue_set()); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5069 dirty_card_queue_set().reset_for_par_iteration(); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5070 if (use_parallel_gc_threads()) { |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5071 set_par_threads(n_workers); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5072 workers()->run_task(&redirty_task); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5073 set_par_threads(0); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5074 } else { |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5075 redirty_task.work(0); |
|
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5076 } |
|
17756
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5077 |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5078 DirtyCardQueueSet& dcq = JavaThread::dirty_card_queue_set(); |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5079 dcq.merge_bufferlists(&dirty_card_queue_set()); |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5080 assert(dirty_card_queue_set().completed_buffers_num() == 0, "All should be consumed"); |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5081 |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5082 g1_policy()->phase_times()->record_redirty_logged_cards_time_ms((os::elapsedTime() - redirty_logged_cards_start) * 1000.0); |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5083 } |
|
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5084 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5085 // Weak Reference Processing support |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5086 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5087 // An always "is_alive" closure that is used to preserve referents. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5088 // 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
|
5089 // of referent objects that are pointed to by reference objects |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5090 // discovered by the CM ref processor. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5091 class G1AlwaysAliveClosure: public BoolObjectClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5092 G1CollectedHeap* _g1; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5093 public: |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5094 G1AlwaysAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5095 bool do_object_b(oop p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5096 if (p != NULL) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5097 return true; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5098 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5099 return false; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5100 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5101 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5102 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5103 bool G1STWIsAliveClosure::do_object_b(oop p) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5104 // An object is reachable if it is outside the collection set, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5105 // or is inside and copied. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5106 return !_g1->obj_in_cs(p) || p->is_forwarded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5107 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5108 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5109 // Non Copying Keep Alive closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5110 class G1KeepAliveClosure: public OopClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5111 G1CollectedHeap* _g1; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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|
5112 public: |
|
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|
5113 G1KeepAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
|
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|
5114 void do_oop(narrowOop* p) { guarantee(false, "Not needed"); } |
|
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|
5115 void do_oop( oop* p) { |
|
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|
5116 oop obj = *p; |
|
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|
5117 |
|
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|
5118 if (_g1->obj_in_cs(obj)) { |
|
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|
5119 assert( obj->is_forwarded(), "invariant" ); |
|
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|
5120 *p = obj->forwardee(); |
|
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|
5121 } |
|
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|
5122 } |
|
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|
5123 }; |
|
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changeset
|
5124 |
|
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|
5125 // Copying Keep Alive closure - can be called from both |
|
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|
5126 // serial and parallel code as long as different worker |
|
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|
5127 // threads utilize different G1ParScanThreadState instances |
|
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|
5128 // and different queues. |
|
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changeset
|
5129 |
|
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|
5130 class G1CopyingKeepAliveClosure: public OopClosure { |
|
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|
5131 G1CollectedHeap* _g1h; |
|
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|
5132 OopClosure* _copy_non_heap_obj_cl; |
|
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5133 OopsInHeapRegionClosure* _copy_metadata_obj_cl; |
|
3979
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|
5134 G1ParScanThreadState* _par_scan_state; |
|
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|
5135 |
|
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|
5136 public: |
|
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|
5137 G1CopyingKeepAliveClosure(G1CollectedHeap* g1h, |
|
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|
5138 OopClosure* non_heap_obj_cl, |
|
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|
5139 OopsInHeapRegionClosure* metadata_obj_cl, |
|
3979
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|
5140 G1ParScanThreadState* pss): |
|
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|
5141 _g1h(g1h), |
|
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|
5142 _copy_non_heap_obj_cl(non_heap_obj_cl), |
|
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|
5143 _copy_metadata_obj_cl(metadata_obj_cl), |
|
3979
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|
5144 _par_scan_state(pss) |
|
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|
5145 {} |
|
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|
5146 |
|
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|
5147 virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
|
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|
5148 virtual void do_oop( oop* p) { do_oop_work(p); } |
|
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|
5149 |
|
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changeset
|
5150 template <class T> void do_oop_work(T* p) { |
|
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|
5151 oop obj = oopDesc::load_decode_heap_oop(p); |
|
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|
5152 |
|
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changeset
|
5153 if (_g1h->obj_in_cs(obj)) { |
|
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|
5154 // If the referent object has been forwarded (either copied |
|
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|
5155 // to a new location or to itself in the event of an |
|
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|
5156 // evacuation failure) then we need to update the reference |
|
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|
5157 // field and, if both reference and referent are in the G1 |
|
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|
5158 // heap, update the RSet for the referent. |
|
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|
5159 // |
|
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changeset
|
5160 // If the referent has not been forwarded then we have to keep |
|
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|
5161 // it alive by policy. Therefore we have copy the referent. |
|
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|
5162 // |
|
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changeset
|
5163 // If the reference field is in the G1 heap then we can push |
|
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changeset
|
5164 // on the PSS queue. When the queue is drained (after each |
|
4dfb2df418f2
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|
5165 // phase of reference processing) the object and it's followers |
|
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|
5166 // will be copied, the reference field set to point to the |
|
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|
5167 // new location, and the RSet updated. Otherwise we need to |
|
6725
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|
5168 // use the the non-heap or metadata closures directly to copy |
| 10405 | 5169 // the referent object and update the pointer, while avoiding |
|
3979
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changeset
|
5170 // updating the RSet. |
|
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changeset
|
5171 |
|
4dfb2df418f2
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changeset
|
5172 if (_g1h->is_in_g1_reserved(p)) { |
|
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changeset
|
5173 _par_scan_state->push_on_queue(p); |
|
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changeset
|
5174 } else { |
|
17935
7384f6a12fc1
8038212: Method::is_valid_method() check has performance regression impact for stackwalking
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17866
diff
changeset
|
5175 assert(!Metaspace::contains((const void*)p), |
|
6725
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changeset
|
5176 err_msg("Otherwise need to call _copy_metadata_obj_cl->do_oop(p) " |
|
da91efe96a93
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|
5177 PTR_FORMAT, p)); |
|
3979
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changeset
|
5178 _copy_non_heap_obj_cl->do_oop(p); |
|
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changeset
|
5179 } |
|
4dfb2df418f2
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diff
changeset
|
5180 } |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5181 } |
|
4dfb2df418f2
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diff
changeset
|
5182 }; |
|
4dfb2df418f2
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diff
changeset
|
5183 |
|
4dfb2df418f2
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diff
changeset
|
5184 // Serial drain queue closure. Called as the 'complete_gc' |
|
4dfb2df418f2
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changeset
|
5185 // closure for each discovered list in some of the |
|
4dfb2df418f2
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changeset
|
5186 // reference processing phases. |
|
4dfb2df418f2
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diff
changeset
|
5187 |
|
4dfb2df418f2
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diff
changeset
|
5188 class G1STWDrainQueueClosure: public VoidClosure { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5189 protected: |
|
4dfb2df418f2
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diff
changeset
|
5190 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
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changeset
|
5191 G1ParScanThreadState* _par_scan_state; |
|
4dfb2df418f2
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changeset
|
5192 |
|
4dfb2df418f2
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diff
changeset
|
5193 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } |
|
4dfb2df418f2
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changeset
|
5194 |
|
4dfb2df418f2
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diff
changeset
|
5195 public: |
|
4dfb2df418f2
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diff
changeset
|
5196 G1STWDrainQueueClosure(G1CollectedHeap* g1h, G1ParScanThreadState* pss) : |
|
4dfb2df418f2
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changeset
|
5197 _g1h(g1h), |
|
4dfb2df418f2
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diff
changeset
|
5198 _par_scan_state(pss) |
|
4dfb2df418f2
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diff
changeset
|
5199 { } |
|
4dfb2df418f2
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diff
changeset
|
5200 |
|
4dfb2df418f2
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diff
changeset
|
5201 void do_void() { |
|
4dfb2df418f2
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diff
changeset
|
5202 G1ParScanThreadState* const pss = par_scan_state(); |
|
4dfb2df418f2
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diff
changeset
|
5203 pss->trim_queue(); |
|
4dfb2df418f2
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diff
changeset
|
5204 } |
|
4dfb2df418f2
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diff
changeset
|
5205 }; |
|
4dfb2df418f2
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diff
changeset
|
5206 |
|
4dfb2df418f2
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diff
changeset
|
5207 // Parallel Reference Processing closures |
|
4dfb2df418f2
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diff
changeset
|
5208 |
|
4dfb2df418f2
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diff
changeset
|
5209 // Implementation of AbstractRefProcTaskExecutor for parallel reference |
|
4dfb2df418f2
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diff
changeset
|
5210 // processing during G1 evacuation pauses. |
|
4dfb2df418f2
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diff
changeset
|
5211 |
|
4dfb2df418f2
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diff
changeset
|
5212 class G1STWRefProcTaskExecutor: public AbstractRefProcTaskExecutor { |
|
4dfb2df418f2
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|
5213 private: |
|
4dfb2df418f2
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diff
changeset
|
5214 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
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|
5215 RefToScanQueueSet* _queues; |
|
4095
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|
5216 FlexibleWorkGang* _workers; |
|
3979
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|
5217 int _active_workers; |
|
4dfb2df418f2
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diff
changeset
|
5218 |
|
4dfb2df418f2
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diff
changeset
|
5219 public: |
|
4dfb2df418f2
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changeset
|
5220 G1STWRefProcTaskExecutor(G1CollectedHeap* g1h, |
|
4095
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diff
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|
5221 FlexibleWorkGang* workers, |
|
3979
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changeset
|
5222 RefToScanQueueSet *task_queues, |
|
4dfb2df418f2
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diff
changeset
|
5223 int n_workers) : |
|
4dfb2df418f2
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diff
changeset
|
5224 _g1h(g1h), |
|
4dfb2df418f2
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diff
changeset
|
5225 _queues(task_queues), |
|
4dfb2df418f2
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diff
changeset
|
5226 _workers(workers), |
|
4dfb2df418f2
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diff
changeset
|
5227 _active_workers(n_workers) |
|
4dfb2df418f2
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diff
changeset
|
5228 { |
|
4dfb2df418f2
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diff
changeset
|
5229 assert(n_workers > 0, "shouldn't call this otherwise"); |
|
4dfb2df418f2
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changeset
|
5230 } |
|
4dfb2df418f2
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diff
changeset
|
5231 |
|
4dfb2df418f2
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diff
changeset
|
5232 // Executes the given task using concurrent marking worker threads. |
|
4dfb2df418f2
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diff
changeset
|
5233 virtual void execute(ProcessTask& task); |
|
4dfb2df418f2
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diff
changeset
|
5234 virtual void execute(EnqueueTask& task); |
|
4dfb2df418f2
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changeset
|
5235 }; |
|
4dfb2df418f2
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diff
changeset
|
5236 |
|
4dfb2df418f2
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diff
changeset
|
5237 // Gang task for possibly parallel reference processing |
|
4dfb2df418f2
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diff
changeset
|
5238 |
|
4dfb2df418f2
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|
5239 class G1STWRefProcTaskProxy: public AbstractGangTask { |
|
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|
5240 typedef AbstractRefProcTaskExecutor::ProcessTask ProcessTask; |
|
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|
5241 ProcessTask& _proc_task; |
|
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|
5242 G1CollectedHeap* _g1h; |
|
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|
5243 RefToScanQueueSet *_task_queues; |
|
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|
5244 ParallelTaskTerminator* _terminator; |
|
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|
5245 |
|
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|
5246 public: |
|
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|
5247 G1STWRefProcTaskProxy(ProcessTask& proc_task, |
|
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|
5248 G1CollectedHeap* g1h, |
|
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|
5249 RefToScanQueueSet *task_queues, |
|
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|
5250 ParallelTaskTerminator* terminator) : |
|
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|
5251 AbstractGangTask("Process reference objects in parallel"), |
|
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|
5252 _proc_task(proc_task), |
|
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changeset
|
5253 _g1h(g1h), |
|
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|
5254 _task_queues(task_queues), |
|
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|
5255 _terminator(terminator) |
|
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|
5256 {} |
|
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|
5257 |
|
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|
5258 virtual void work(uint worker_id) { |
|
3979
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|
5259 // The reference processing task executed by a single worker. |
|
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|
5260 ResourceMark rm; |
|
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|
5261 HandleMark hm; |
|
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changeset
|
5262 |
|
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|
5263 G1STWIsAliveClosure is_alive(_g1h); |
|
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|
5264 |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
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|
5265 G1ParScanThreadState pss(_g1h, worker_id, NULL); |
|
3979
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|
5266 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
|
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
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changeset
|
5267 |
|
3979
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|
5268 pss.set_evac_failure_closure(&evac_failure_cl); |
|
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changeset
|
5269 |
|
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changeset
|
5270 G1ParScanExtRootClosure only_copy_non_heap_cl(_g1h, &pss, NULL); |
|
6725
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|
5271 G1ParScanMetadataClosure only_copy_metadata_cl(_g1h, &pss, NULL); |
|
3979
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|
5272 |
|
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|
5273 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
|
6725
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|
5274 G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(_g1h, &pss, NULL); |
|
3979
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|
5275 |
|
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|
5276 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
|
6725
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|
5277 OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
|
3979
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|
5278 |
|
4dfb2df418f2
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changeset
|
5279 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
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|
5280 // We also need to mark copied objects. |
|
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changeset
|
5281 copy_non_heap_cl = ©_mark_non_heap_cl; |
|
6725
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|
5282 copy_metadata_cl = ©_mark_metadata_cl; |
|
3979
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|
5283 } |
|
4dfb2df418f2
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changeset
|
5284 |
|
4dfb2df418f2
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changeset
|
5285 // Keep alive closure. |
|
6725
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|
5286 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, copy_metadata_cl, &pss); |
|
3979
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|
5287 |
|
4dfb2df418f2
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changeset
|
5288 // Complete GC closure |
|
4dfb2df418f2
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changeset
|
5289 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _task_queues, _terminator); |
|
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|
5290 |
|
4dfb2df418f2
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changeset
|
5291 // Call the reference processing task's work routine. |
|
4728
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|
5292 _proc_task.work(worker_id, is_alive, keep_alive, drain_queue); |
|
3979
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|
5293 |
|
4dfb2df418f2
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diff
changeset
|
5294 // Note we cannot assert that the refs array is empty here as not all |
|
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changeset
|
5295 // of the processing tasks (specifically phase2 - pp2_work) execute |
|
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changeset
|
5296 // the complete_gc closure (which ordinarily would drain the queue) so |
|
4dfb2df418f2
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changeset
|
5297 // the queue may not be empty. |
|
4dfb2df418f2
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diff
changeset
|
5298 } |
|
4dfb2df418f2
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diff
changeset
|
5299 }; |
|
4dfb2df418f2
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diff
changeset
|
5300 |
|
4dfb2df418f2
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diff
changeset
|
5301 // Driver routine for parallel reference processing. |
|
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diff
changeset
|
5302 // Creates an instance of the ref processing gang |
|
4dfb2df418f2
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diff
changeset
|
5303 // task and has the worker threads execute it. |
|
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changeset
|
5304 void G1STWRefProcTaskExecutor::execute(ProcessTask& proc_task) { |
|
4dfb2df418f2
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changeset
|
5305 assert(_workers != NULL, "Need parallel worker threads."); |
|
4dfb2df418f2
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diff
changeset
|
5306 |
|
4dfb2df418f2
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diff
changeset
|
5307 ParallelTaskTerminator terminator(_active_workers, _queues); |
|
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changeset
|
5308 G1STWRefProcTaskProxy proc_task_proxy(proc_task, _g1h, _queues, &terminator); |
|
4dfb2df418f2
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changeset
|
5309 |
|
4dfb2df418f2
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diff
changeset
|
5310 _g1h->set_par_threads(_active_workers); |
|
4dfb2df418f2
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changeset
|
5311 _workers->run_task(&proc_task_proxy); |
|
4dfb2df418f2
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changeset
|
5312 _g1h->set_par_threads(0); |
|
4dfb2df418f2
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diff
changeset
|
5313 } |
|
4dfb2df418f2
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diff
changeset
|
5314 |
|
4dfb2df418f2
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diff
changeset
|
5315 // Gang task for parallel reference enqueueing. |
|
4dfb2df418f2
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changeset
|
5316 |
|
4dfb2df418f2
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diff
changeset
|
5317 class G1STWRefEnqueueTaskProxy: public AbstractGangTask { |
|
4dfb2df418f2
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|
5318 typedef AbstractRefProcTaskExecutor::EnqueueTask EnqueueTask; |
|
4dfb2df418f2
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changeset
|
5319 EnqueueTask& _enq_task; |
|
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changeset
|
5320 |
|
4dfb2df418f2
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diff
changeset
|
5321 public: |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5322 G1STWRefEnqueueTaskProxy(EnqueueTask& enq_task) : |
|
4dfb2df418f2
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diff
changeset
|
5323 AbstractGangTask("Enqueue reference objects in parallel"), |
|
4dfb2df418f2
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diff
changeset
|
5324 _enq_task(enq_task) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5325 { } |
|
4dfb2df418f2
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diff
changeset
|
5326 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
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diff
changeset
|
5327 virtual void work(uint worker_id) { |
|
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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diff
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|
5328 _enq_task.work(worker_id); |
|
3979
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parents:
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diff
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|
5329 } |
|
4dfb2df418f2
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diff
changeset
|
5330 }; |
|
4dfb2df418f2
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diff
changeset
|
5331 |
| 10405 | 5332 // Driver routine for parallel reference enqueueing. |
|
3979
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changeset
|
5333 // Creates an instance of the ref enqueueing gang |
|
4dfb2df418f2
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diff
changeset
|
5334 // task and has the worker threads execute it. |
|
4dfb2df418f2
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diff
changeset
|
5335 |
|
4dfb2df418f2
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diff
changeset
|
5336 void G1STWRefProcTaskExecutor::execute(EnqueueTask& enq_task) { |
|
4dfb2df418f2
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diff
changeset
|
5337 assert(_workers != NULL, "Need parallel worker threads."); |
|
4dfb2df418f2
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diff
changeset
|
5338 |
|
4dfb2df418f2
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diff
changeset
|
5339 G1STWRefEnqueueTaskProxy enq_task_proxy(enq_task); |
|
4dfb2df418f2
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changeset
|
5340 |
|
4dfb2df418f2
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diff
changeset
|
5341 _g1h->set_par_threads(_active_workers); |
|
4dfb2df418f2
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diff
changeset
|
5342 _workers->run_task(&enq_task_proxy); |
|
4dfb2df418f2
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changeset
|
5343 _g1h->set_par_threads(0); |
|
4dfb2df418f2
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diff
changeset
|
5344 } |
|
4dfb2df418f2
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parents:
3973
diff
changeset
|
5345 |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5346 // End of weak reference support closures |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5347 |
|
4dfb2df418f2
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diff
changeset
|
5348 // Abstract task used to preserve (i.e. copy) any referent objects |
|
4dfb2df418f2
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diff
changeset
|
5349 // that are in the collection set and are pointed to by reference |
|
4dfb2df418f2
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diff
changeset
|
5350 // objects discovered by the CM ref processor. |
|
4dfb2df418f2
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diff
changeset
|
5351 |
|
4dfb2df418f2
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diff
changeset
|
5352 class G1ParPreserveCMReferentsTask: public AbstractGangTask { |
|
4dfb2df418f2
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parents:
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diff
changeset
|
5353 protected: |
|
4dfb2df418f2
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diff
changeset
|
5354 G1CollectedHeap* _g1h; |
|
4dfb2df418f2
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diff
changeset
|
5355 RefToScanQueueSet *_queues; |
|
4dfb2df418f2
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diff
changeset
|
5356 ParallelTaskTerminator _terminator; |
|
4728
441e946dc1af
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|
5357 uint _n_workers; |
|
3979
4dfb2df418f2
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diff
changeset
|
5358 |
|
4dfb2df418f2
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diff
changeset
|
5359 public: |
|
4dfb2df418f2
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diff
changeset
|
5360 G1ParPreserveCMReferentsTask(G1CollectedHeap* g1h,int workers, RefToScanQueueSet *task_queues) : |
|
4dfb2df418f2
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diff
changeset
|
5361 AbstractGangTask("ParPreserveCMReferents"), |
|
4dfb2df418f2
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diff
changeset
|
5362 _g1h(g1h), |
|
4dfb2df418f2
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diff
changeset
|
5363 _queues(task_queues), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5364 _terminator(workers, _queues), |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5365 _n_workers(workers) |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5366 { } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5367 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5368 void work(uint worker_id) { |
|
3979
4dfb2df418f2
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parents:
3973
diff
changeset
|
5369 ResourceMark rm; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5370 HandleMark hm; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5371 |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5372 G1ParScanThreadState pss(_g1h, worker_id, NULL); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5373 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
|
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
5374 |
|
3979
4dfb2df418f2
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parents:
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diff
changeset
|
5375 pss.set_evac_failure_closure(&evac_failure_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5376 |
|
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
5377 assert(pss.queue_is_empty(), "both queue and overflow should be empty"); |
|
3979
4dfb2df418f2
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parents:
3973
diff
changeset
|
5378 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5379 G1ParScanExtRootClosure only_copy_non_heap_cl(_g1h, &pss, NULL); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5380 G1ParScanMetadataClosure only_copy_metadata_cl(_g1h, &pss, NULL); |
|
3979
4dfb2df418f2
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diff
changeset
|
5381 |
|
4dfb2df418f2
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3973
diff
changeset
|
5382 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
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|
5383 G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(_g1h, &pss, NULL); |
|
3979
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diff
changeset
|
5384 |
|
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
5385 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
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|
5386 OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
|
3979
4dfb2df418f2
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parents:
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diff
changeset
|
5387 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5388 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5389 // We also need to mark copied objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5390 copy_non_heap_cl = ©_mark_non_heap_cl; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5391 copy_metadata_cl = ©_mark_metadata_cl; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5392 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5393 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5394 // Is alive closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5395 G1AlwaysAliveClosure always_alive(_g1h); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5396 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5397 // Copying keep alive closure. Applied to referent objects that need |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5398 // to be copied. |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5399 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, copy_metadata_cl, &pss); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5400 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5401 ReferenceProcessor* rp = _g1h->ref_processor_cm(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5402 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5403 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
|
5404 uint stride = MIN2(MAX2(_n_workers, 1U), limit); |
|
3979
4dfb2df418f2
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parents:
3973
diff
changeset
|
5405 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5406 // 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
|
5407 // 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
|
5408 // change the worker ids. |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5409 assert(0 <= worker_id && worker_id < limit, "sanity"); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5410 assert(!rp->discovery_is_atomic(), "check this code"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5411 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5412 // 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
|
5413 for (uint idx = worker_id; idx < limit; idx += stride) { |
|
4014
bf2d2b8b1726
7095243: Disambiguate ReferenceProcessor::_discoveredSoftRefs
johnc
parents:
4013
diff
changeset
|
5414 DiscoveredList& ref_list = rp->discovered_refs()[idx]; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5415 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5416 DiscoveredListIterator iter(ref_list, &keep_alive, &always_alive); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5417 while (iter.has_next()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5418 // Since discovery is not atomic for the CM ref processor, we |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5419 // can see some null referent objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5420 iter.load_ptrs(DEBUG_ONLY(true)); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5421 oop ref = iter.obj(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5422 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5423 // This will filter nulls. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5424 if (iter.is_referent_alive()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5425 iter.make_referent_alive(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5426 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5427 iter.move_to_next(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5428 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5429 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5430 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5431 // Drain the queue - which may cause stealing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5432 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _queues, &_terminator); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5433 drain_queue.do_void(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5434 // Allocation buffers were retired at the end of G1ParEvacuateFollowersClosure |
|
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
5435 assert(pss.queue_is_empty(), "should be"); |
|
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 }; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5438 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5439 // Weak Reference processing during an evacuation pause (part 1). |
| 6819 | 5440 void G1CollectedHeap::process_discovered_references(uint no_of_gc_workers) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5441 double ref_proc_start = os::elapsedTime(); |
|
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 ReferenceProcessor* rp = _ref_processor_stw; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5444 assert(rp->discovery_enabled(), "should have been enabled"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5445 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5446 // Any reference objects, in the collection set, that were 'discovered' |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5447 // 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
|
5448 // applying the external root copy closure to the discovered lists, or |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5449 // by following an RSet entry). |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5450 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5451 // 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
|
5452 // 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
|
5453 // processor would have seen that the reference object had already |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5454 // been 'discovered' and would have skipped discovering the reference, |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5455 // but would not have treated the reference object as a regular oop. |
| 10405 | 5456 // As a result the copy closure would not have been applied to the |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5457 // referent object. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5458 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5459 // We need to explicitly copy these referent objects - the references |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5460 // will be processed at the end of remarking. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5461 // |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5462 // 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
|
5463 // 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
|
5464 // referents points to another object which is also referenced by an |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5465 // object discovered by the STW ref processor. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5466 |
| 4711 | 5467 assert(!G1CollectedHeap::use_parallel_gc_threads() || |
| 6819 | 5468 no_of_gc_workers == workers()->active_workers(), |
| 5469 "Need to reset active GC workers"); | |
| 5470 | |
| 5471 set_par_threads(no_of_gc_workers); | |
| 5472 G1ParPreserveCMReferentsTask keep_cm_referents(this, | |
| 5473 no_of_gc_workers, | |
| 5474 _task_queues); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5475 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5476 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5477 workers()->run_task(&keep_cm_referents); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5478 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5479 keep_cm_referents.work(0); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5480 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5481 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5482 set_par_threads(0); |
|
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 // Closure to test whether a referent is alive. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5485 G1STWIsAliveClosure is_alive(this); |
|
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 // Even when parallel reference processing is enabled, the processing |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5488 // 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
|
5489 // 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
|
5490 // JNI refs. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5491 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5492 // Use only a single queue for this PSS. |
|
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5493 G1ParScanThreadState pss(this, 0, NULL); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5494 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5495 // We do not embed a reference processor in the copying/scanning |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5496 // closures while we're actually processing the discovered |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5497 // reference objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5498 G1ParScanHeapEvacFailureClosure evac_failure_cl(this, &pss, NULL); |
|
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
5499 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5500 pss.set_evac_failure_closure(&evac_failure_cl); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5501 |
|
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
5502 assert(pss.queue_is_empty(), "pre-condition"); |
|
3979
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 G1ParScanExtRootClosure only_copy_non_heap_cl(this, &pss, NULL); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5505 G1ParScanMetadataClosure only_copy_metadata_cl(this, &pss, NULL); |
|
3979
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 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(this, &pss, NULL); |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5508 G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(this, &pss, NULL); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5509 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5510 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5511 OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5512 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5513 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5514 // We also need to mark copied objects. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5515 copy_non_heap_cl = ©_mark_non_heap_cl; |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5516 copy_metadata_cl = ©_mark_metadata_cl; |
|
3979
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 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5519 // Keep alive closure. |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5520 G1CopyingKeepAliveClosure keep_alive(this, copy_non_heap_cl, copy_metadata_cl, &pss); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5521 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5522 // Serial Complete GC closure |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5523 G1STWDrainQueueClosure drain_queue(this, &pss); |
|
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 // Setup the soft refs policy... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5526 rp->setup_policy(false); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5527 |
| 10405 | 5528 ReferenceProcessorStats stats; |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5529 if (!rp->processing_is_mt()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5530 // Serial reference processing... |
| 10405 | 5531 stats = rp->process_discovered_references(&is_alive, |
| 5532 &keep_alive, | |
| 5533 &drain_queue, | |
| 5534 NULL, | |
|
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5535 _gc_timer_stw, |
|
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5536 _gc_tracer_stw->gc_id()); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5537 } else { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5538 // Parallel reference processing |
| 6819 | 5539 assert(rp->num_q() == no_of_gc_workers, "sanity"); |
| 5540 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
| 5541 | |
| 5542 G1STWRefProcTaskExecutor par_task_executor(this, workers(), _task_queues, no_of_gc_workers); | |
| 10405 | 5543 stats = rp->process_discovered_references(&is_alive, |
| 5544 &keep_alive, | |
| 5545 &drain_queue, | |
| 5546 &par_task_executor, | |
|
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5547 _gc_timer_stw, |
|
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5548 _gc_tracer_stw->gc_id()); |
| 10405 | 5549 } |
| 5550 | |
| 5551 _gc_tracer_stw->report_gc_reference_stats(stats); | |
|
20215
983092f35ff7
8028710: G1 does not retire allocation buffers after reference processing work
tschatzl
parents:
20212
diff
changeset
|
5552 |
|
983092f35ff7
8028710: G1 does not retire allocation buffers after reference processing work
tschatzl
parents:
20212
diff
changeset
|
5553 // We have completed copying any necessary live referent objects. |
|
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
5554 assert(pss.queue_is_empty(), "both queue and overflow should be empty"); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5555 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5556 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
|
5557 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
|
5558 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5559 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5560 // Weak Reference processing during an evacuation pause (part 2). |
| 6819 | 5561 void G1CollectedHeap::enqueue_discovered_references(uint no_of_gc_workers) { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5562 double ref_enq_start = os::elapsedTime(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5563 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5564 ReferenceProcessor* rp = _ref_processor_stw; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5565 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
|
5566 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5567 // Now enqueue any remaining on the discovered lists on to |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5568 // the pending list. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5569 if (!rp->processing_is_mt()) { |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5570 // Serial reference processing... |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5571 rp->enqueue_discovered_references(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5572 } else { |
| 10405 | 5573 // Parallel reference enqueueing |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5574 |
| 6819 | 5575 assert(no_of_gc_workers == workers()->active_workers(), |
| 5576 "Need to reset active workers"); | |
| 5577 assert(rp->num_q() == no_of_gc_workers, "sanity"); | |
| 5578 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
| 5579 | |
| 5580 G1STWRefProcTaskExecutor par_task_executor(this, workers(), _task_queues, no_of_gc_workers); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5581 rp->enqueue_discovered_references(&par_task_executor); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5582 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5583 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5584 rp->verify_no_references_recorded(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5585 assert(!rp->discovery_enabled(), "should have been disabled"); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5586 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5587 // FIXME |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5588 // 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
|
5589 // Should we do that here also? We could, but it is a serial operation |
| 10405 | 5590 // and could significantly increase the pause time. |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5591 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5592 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
|
5593 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
|
5594 } |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5595 |
| 10405 | 5596 void G1CollectedHeap::evacuate_collection_set(EvacuationInfo& evacuation_info) { |
|
4781
bacb651cf5bf
7113006: G1: excessive ergo output when an evac failure happens
tonyp
parents:
4728
diff
changeset
|
5597 _expand_heap_after_alloc_failure = true; |
| 10405 | 5598 _evacuation_failed = false; |
| 342 | 5599 |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5600 // Should G1EvacuationFailureALot be in effect for this GC? |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5601 NOT_PRODUCT(set_evacuation_failure_alot_for_current_gc();) |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5602 |
| 342 | 5603 g1_rem_set()->prepare_for_oops_into_collection_set_do(); |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5604 |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5605 // Disable the hot card cache. |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5606 G1HotCardCache* hot_card_cache = _cg1r->hot_card_cache(); |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5607 hot_card_cache->reset_hot_cache_claimed_index(); |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5608 hot_card_cache->set_use_cache(false); |
| 889 | 5609 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5610 uint n_workers; |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5611 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5612 n_workers = |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5613 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5614 workers()->active_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5615 Threads::number_of_non_daemon_threads()); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5616 assert(UseDynamicNumberOfGCThreads || |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5617 n_workers == workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5618 "If not dynamic should be using all the workers"); |
| 4711 | 5619 workers()->set_active_workers(n_workers); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5620 set_par_threads(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5621 } else { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5622 assert(n_par_threads() == 0, |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5623 "Should be the original non-parallel value"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5624 n_workers = 1; |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5625 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5626 |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5627 G1ParTask g1_par_task(this, _task_queues); |
| 342 | 5628 |
| 5629 init_for_evac_failure(NULL); | |
| 5630 | |
| 5631 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
|
5632 |
|
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5633 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
|
5634 double start_par_time_sec = os::elapsedTime(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5635 double end_par_time_sec; |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5636 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5637 { |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5638 StrongRootsScope srs(this); |
|
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5639 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5640 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5641 // 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
|
5642 if (ParallelGCVerbose) G1ParScanThreadState::print_termination_stats_hdr(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5643 // These tasks use ShareHeap::_process_strong_tasks |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5644 assert(UseDynamicNumberOfGCThreads || |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5645 workers()->active_workers() == workers()->total_workers(), |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5646 "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
|
5647 workers()->run_task(&g1_par_task); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5648 } else { |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5649 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
|
5650 g1_par_task.work(0); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5651 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5652 end_par_time_sec = os::elapsedTime(); |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5653 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5654 // 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
|
5655 // 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
|
5656 // 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
|
5657 // 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
|
5658 // reported parallel time. |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5659 } |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5660 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5661 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
|
5662 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
|
5663 |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5664 double code_root_fixup_time_ms = |
|
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5665 (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
|
5666 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
|
5667 |
| 342 | 5668 set_par_threads(0); |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5669 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5670 // Process any discovered reference objects - we have |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5671 // to do this _before_ we retire the GC alloc regions |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5672 // as we may have to copy some 'reachable' referent |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5673 // objects (and their reachable sub-graphs) that were |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5674 // not copied during the pause. |
| 6819 | 5675 process_discovered_references(n_workers); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5676 |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5677 // Weak root processing. |
| 342 | 5678 { |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5679 G1STWIsAliveClosure is_alive(this); |
| 342 | 5680 G1KeepAliveClosure keep_alive(this); |
| 5681 JNIHandles::weak_oops_do(&is_alive, &keep_alive); | |
| 17764 | 5682 if (G1StringDedup::is_enabled()) { |
| 5683 G1StringDedup::unlink_or_oops_do(&is_alive, &keep_alive); | |
| 5684 } | |
| 342 | 5685 } |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5686 |
| 10405 | 5687 release_gc_alloc_regions(n_workers, evacuation_info); |
| 342 | 5688 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
|
5689 |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5690 // Reset and re-enable the hot card cache. |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5691 // Note the counts for the cards in the regions in the |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5692 // collection set are reset when the collection set is freed. |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5693 hot_card_cache->reset_hot_cache(); |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5694 hot_card_cache->set_use_cache(true); |
| 342 | 5695 |
| 12080 | 5696 // Migrate the strong code roots attached to each region in |
| 5697 // the collection set. Ideally we would like to do this | |
| 5698 // after we have finished the scanning/evacuation of the | |
| 5699 // strong code roots for a particular heap region. | |
| 5700 migrate_strong_code_roots(); | |
| 5701 | |
|
17753
191174b49bec
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
17749
diff
changeset
|
5702 purge_code_root_memory(); |
|
191174b49bec
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
17749
diff
changeset
|
5703 |
| 12080 | 5704 if (g1_policy()->during_initial_mark_pause()) { |
| 5705 // Reset the claim values set during marking the strong code roots | |
| 5706 reset_heap_region_claim_values(); | |
| 5707 } | |
| 5708 | |
| 342 | 5709 finalize_for_evac_failure(); |
| 5710 | |
| 5711 if (evacuation_failed()) { | |
| 5712 remove_self_forwarding_pointers(); | |
|
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5713 |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5714 // Reset the G1EvacuationFailureALot counters and flags |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5715 // Note: the values are reset only when an actual |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5716 // evacuation failure occurs. |
|
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5717 NOT_PRODUCT(reset_evacuation_should_fail();) |
| 342 | 5718 } |
| 5719 | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5720 // Enqueue any remaining references remaining on the STW |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5721 // reference processor's discovered lists. We need to do |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5722 // this after the card table is cleaned (and verified) as |
| 10405 | 5723 // the act of enqueueing entries on to the pending list |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5724 // will log these updates (and dirty their associated |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5725 // cards). We need these updates logged to update any |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5726 // RSets. |
| 6819 | 5727 enqueue_discovered_references(n_workers); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5728 |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5729 if (G1DeferredRSUpdate) { |
|
17756
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5730 redirty_logged_cards(); |
|
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5731 } |
| 342 | 5732 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
| 5733 } | |
| 5734 | |
| 2152 | 5735 void G1CollectedHeap::free_region(HeapRegion* hr, |
| 5736 FreeRegionList* free_list, | |
|
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
5737 bool par, |
|
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
5738 bool locked) { |
| 2152 | 5739 assert(!hr->isHumongous(), "this is only for non-humongous regions"); |
| 5740 assert(!hr->is_empty(), "the region should not be empty"); | |
| 5741 assert(free_list != NULL, "pre-condition"); | |
| 5742 | |
|
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5743 // Clear the card counts for this region. |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5744 // Note: we only need to do this if the region is not young |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5745 // (since we don't refine cards in young regions). |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5746 if (!hr->is_young()) { |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5747 _cg1r->hot_card_cache()->reset_card_counts(hr); |
|
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5748 } |
|
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
5749 hr->hr_clear(par, true /* clear_space */, locked /* locked */); |
|
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
17759
diff
changeset
|
5750 free_list->add_ordered(hr); |
| 2152 | 5751 } |
| 5752 | |
| 5753 void G1CollectedHeap::free_humongous_region(HeapRegion* hr, | |
| 5754 FreeRegionList* free_list, | |
| 5755 bool par) { | |
| 5756 assert(hr->startsHumongous(), "this is only for starts humongous regions"); | |
| 5757 assert(free_list != NULL, "pre-condition"); | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5758 |
| 2152 | 5759 size_t hr_capacity = hr->capacity(); |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5760 // 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
|
5761 // otherwise the information will be gone. |
|
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5762 uint last_index = hr->last_hc_index(); |
| 2152 | 5763 hr->set_notHumongous(); |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5764 free_region(hr, free_list, par); |
| 2152 | 5765 |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
5766 uint i = hr->hrs_index() + 1; |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5767 while (i < last_index) { |
| 3766 | 5768 HeapRegion* curr_hr = region_at(i); |
|
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5769 assert(curr_hr->continuesHumongous(), "invariant"); |
| 2152 | 5770 curr_hr->set_notHumongous(); |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5771 free_region(curr_hr, free_list, par); |
| 2152 | 5772 i += 1; |
| 5773 } | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5774 } |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5775 |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5776 void G1CollectedHeap::remove_from_old_sets(const HeapRegionSetCount& old_regions_removed, |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5777 const HeapRegionSetCount& humongous_regions_removed) { |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5778 if (old_regions_removed.length() > 0 || humongous_regions_removed.length() > 0) { |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5779 MutexLockerEx x(OldSets_lock, Mutex::_no_safepoint_check_flag); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5780 _old_set.bulk_remove(old_regions_removed); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5781 _humongous_set.bulk_remove(humongous_regions_removed); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5782 } |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5783 |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5784 } |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5785 |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5786 void G1CollectedHeap::prepend_to_freelist(FreeRegionList* list) { |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5787 assert(list != NULL, "list can't be null"); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5788 if (!list->is_empty()) { |
| 2152 | 5789 MutexLockerEx x(FreeList_lock, Mutex::_no_safepoint_check_flag); |
|
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
17759
diff
changeset
|
5790 _free_list.add_ordered(list); |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5791 } |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5792 } |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5793 |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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diff
changeset
|
5794 void G1CollectedHeap::decrement_summary_bytes(size_t bytes) { |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
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diff
changeset
|
5795 assert(_summary_bytes_used >= bytes, |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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diff
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|
5796 err_msg("invariant: _summary_bytes_used: "SIZE_FORMAT" should be >= bytes: "SIZE_FORMAT, |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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diff
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|
5797 _summary_bytes_used, bytes)); |
|
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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17727
diff
changeset
|
5798 _summary_bytes_used -= bytes; |
| 342 | 5799 } |
| 5800 | |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
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diff
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|
5801 class G1ParCleanupCTTask : public AbstractGangTask { |
| 12343 | 5802 G1SATBCardTableModRefBS* _ct_bs; |
|
796
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6819065: G1: eliminate high serial card table clearing time
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|
5803 G1CollectedHeap* _g1h; |
|
940
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6841313: G1: dirty cards of survivor regions in parallel
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|
5804 HeapRegion* volatile _su_head; |
|
796
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6819065: G1: eliminate high serial card table clearing time
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diff
changeset
|
5805 public: |
| 12343 | 5806 G1ParCleanupCTTask(G1SATBCardTableModRefBS* ct_bs, |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
diff
changeset
|
5807 G1CollectedHeap* g1h) : |
|
796
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6819065: G1: eliminate high serial card table clearing time
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diff
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|
5808 AbstractGangTask("G1 Par Cleanup CT Task"), |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
diff
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|
5809 _ct_bs(ct_bs), _g1h(g1h) { } |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
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diff
changeset
|
5810 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5811 void work(uint worker_id) { |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
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diff
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|
5812 HeapRegion* r; |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
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diff
changeset
|
5813 while (r = _g1h->pop_dirty_cards_region()) { |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
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diff
changeset
|
5814 clear_cards(r); |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
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diff
changeset
|
5815 } |
|
940
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6841313: G1: dirty cards of survivor regions in parallel
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changeset
|
5816 } |
|
8624da129f0b
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|
5817 |
|
796
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6819065: G1: eliminate high serial card table clearing time
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diff
changeset
|
5818 void clear_cards(HeapRegion* r) { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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diff
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|
5819 // Cards of the survivors should have already been dirtied. |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
5820 if (!r->is_survivor()) { |
|
796
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6819065: G1: eliminate high serial card table clearing time
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diff
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|
5821 _ct_bs->clear(MemRegion(r->bottom(), r->end())); |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
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|
5822 } |
|
29e7d79232b9
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diff
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|
5823 } |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
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diff
changeset
|
5824 }; |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
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diff
changeset
|
5825 |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
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changeset
|
5826 #ifndef PRODUCT |
|
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6841313: G1: dirty cards of survivor regions in parallel
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|
5827 class G1VerifyCardTableCleanup: public HeapRegionClosure { |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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diff
changeset
|
5828 G1CollectedHeap* _g1h; |
| 12343 | 5829 G1SATBCardTableModRefBS* _ct_bs; |
|
940
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6841313: G1: dirty cards of survivor regions in parallel
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diff
changeset
|
5830 public: |
| 12343 | 5831 G1VerifyCardTableCleanup(G1CollectedHeap* g1h, G1SATBCardTableModRefBS* ct_bs) |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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changeset
|
5832 : _g1h(g1h), _ct_bs(ct_bs) { } |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
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2432
diff
changeset
|
5833 virtual bool doHeapRegion(HeapRegion* r) { |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
5834 if (r->is_survivor()) { |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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diff
changeset
|
5835 _g1h->verify_dirty_region(r); |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
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parents:
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diff
changeset
|
5836 } else { |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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parents:
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diff
changeset
|
5837 _g1h->verify_not_dirty_region(r); |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
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diff
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|
5838 } |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
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diff
changeset
|
5839 return false; |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5840 } |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
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parents:
936
diff
changeset
|
5841 }; |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
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diff
changeset
|
5842 |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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parents:
3293
diff
changeset
|
5843 void G1CollectedHeap::verify_not_dirty_region(HeapRegion* hr) { |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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parents:
3293
diff
changeset
|
5844 // All of the region should be clean. |
| 12343 | 5845 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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parents:
3293
diff
changeset
|
5846 MemRegion mr(hr->bottom(), hr->end()); |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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parents:
3293
diff
changeset
|
5847 ct_bs->verify_not_dirty_region(mr); |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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parents:
3293
diff
changeset
|
5848 } |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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parents:
3293
diff
changeset
|
5849 |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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parents:
3293
diff
changeset
|
5850 void G1CollectedHeap::verify_dirty_region(HeapRegion* hr) { |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5851 // We cannot guarantee that [bottom(),end()] is dirty. Threads |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5852 // dirty allocated blocks as they allocate them. The thread that |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5853 // retires each region and replaces it with a new one will do a |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5854 // maximal allocation to fill in [pre_dummy_top(),end()] but will |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5855 // not dirty that area (one less thing to have to do while holding |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5856 // a lock). So we can only verify that [bottom(),pre_dummy_top()] |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5857 // is dirty. |
| 12343 | 5858 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5859 MemRegion mr(hr->bottom(), hr->pre_dummy_top()); |
|
12835
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
5860 if (hr->is_young()) { |
|
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
5861 ct_bs->verify_g1_young_region(mr); |
|
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
5862 } else { |
|
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
5863 ct_bs->verify_dirty_region(mr); |
|
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
5864 } |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5865 } |
|
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5866 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
5867 void G1CollectedHeap::verify_dirty_young_list(HeapRegion* head) { |
| 12343 | 5868 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
5869 for (HeapRegion* hr = head; hr != NULL; hr = hr->get_next_young_region()) { |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5870 verify_dirty_region(hr); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
5871 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
5872 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
5873 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
5874 void G1CollectedHeap::verify_dirty_young_regions() { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
5875 verify_dirty_young_list(_young_list->first_region()); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
5876 } |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5877 #endif |
|
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5878 |
| 342 | 5879 void G1CollectedHeap::cleanUpCardTable() { |
| 12343 | 5880 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
| 342 | 5881 double start = os::elapsedTime(); |
| 5882 | |
| 4023 | 5883 { |
| 5884 // Iterate over the dirty cards region list. | |
| 5885 G1ParCleanupCTTask cleanup_task(ct_bs, this); | |
| 5886 | |
| 4711 | 5887 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 5888 set_par_threads(); | |
| 4023 | 5889 workers()->run_task(&cleanup_task); |
| 5890 set_par_threads(0); | |
| 5891 } else { | |
| 5892 while (_dirty_cards_region_list) { | |
| 5893 HeapRegion* r = _dirty_cards_region_list; | |
| 5894 cleanup_task.clear_cards(r); | |
| 5895 _dirty_cards_region_list = r->get_next_dirty_cards_region(); | |
| 5896 if (_dirty_cards_region_list == r) { | |
| 5897 // The last region. | |
| 5898 _dirty_cards_region_list = NULL; | |
| 5899 } | |
| 5900 r->set_next_dirty_cards_region(NULL); | |
|
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
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|
5901 } |
|
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5902 } |
| 4023 | 5903 #ifndef PRODUCT |
| 5904 if (G1VerifyCTCleanup || VerifyAfterGC) { | |
| 5905 G1VerifyCardTableCleanup cleanup_verifier(this, ct_bs); | |
| 5906 heap_region_iterate(&cleanup_verifier); | |
| 5907 } | |
| 5908 #endif | |
|
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
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936
diff
changeset
|
5909 } |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
5910 |
| 342 | 5911 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
|
5912 g1_policy()->phase_times()->record_clear_ct_time(elapsed * 1000.0); |
| 342 | 5913 } |
| 5914 | |
| 10405 | 5915 void G1CollectedHeap::free_collection_set(HeapRegion* cs_head, EvacuationInfo& evacuation_info) { |
| 2152 | 5916 size_t pre_used = 0; |
| 5917 FreeRegionList local_free_list("Local List for CSet Freeing"); | |
| 5918 | |
| 342 | 5919 double young_time_ms = 0.0; |
| 5920 double non_young_time_ms = 0.0; | |
| 5921 | |
|
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
5922 // Since the collection set is a superset of the the young list, |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
5923 // all we need to do to clear the young list is clear its |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
5924 // head and length, and unlink any young regions in the code below |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
5925 _young_list->clear(); |
|
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
5926 |
| 342 | 5927 G1CollectorPolicy* policy = g1_policy(); |
| 5928 | |
| 5929 double start_sec = os::elapsedTime(); | |
| 5930 bool non_young = true; | |
| 5931 | |
| 5932 HeapRegion* cur = cs_head; | |
| 5933 int age_bound = -1; | |
| 5934 size_t rs_lengths = 0; | |
| 5935 | |
| 5936 while (cur != NULL) { | |
| 2361 | 5937 assert(!is_on_master_free_list(cur), "sanity"); |
| 342 | 5938 if (non_young) { |
| 5939 if (cur->is_young()) { | |
| 5940 double end_sec = os::elapsedTime(); | |
| 5941 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
| 5942 non_young_time_ms += elapsed_ms; | |
| 5943 | |
| 5944 start_sec = os::elapsedTime(); | |
| 5945 non_young = false; | |
| 5946 } | |
| 5947 } else { | |
|
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
5948 if (!cur->is_young()) { |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
5949 double end_sec = os::elapsedTime(); |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
5950 double elapsed_ms = (end_sec - start_sec) * 1000.0; |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
5951 young_time_ms += elapsed_ms; |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
5952 |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
5953 start_sec = os::elapsedTime(); |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
5954 non_young = true; |
|
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
5955 } |
| 342 | 5956 } |
| 5957 | |
|
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
5958 rs_lengths += cur->rem_set()->occupied_locked(); |
| 342 | 5959 |
| 5960 HeapRegion* next = cur->next_in_collection_set(); | |
| 5961 assert(cur->in_collection_set(), "bad CS"); | |
| 5962 cur->set_next_in_collection_set(NULL); | |
| 5963 cur->set_in_collection_set(false); | |
| 5964 | |
| 5965 if (cur->is_young()) { | |
| 5966 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
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|
5967 assert(index != -1, "invariant"); |
|
6010
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6008
diff
changeset
|
5968 assert((uint) index < policy->young_cset_region_length(), "invariant"); |
| 342 | 5969 size_t words_survived = _surviving_young_words[index]; |
| 5970 cur->record_surv_words_in_group(words_survived); | |
|
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|
5971 |
|
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|
5972 // At this point the we have 'popped' cur from the collection set |
|
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|
5973 // (linked via next_in_collection_set()) but it is still in the |
|
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|
5974 // young list (linked via next_young_region()). Clear the |
|
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|
5975 // _next_young_region field. |
|
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|
5976 cur->set_next_young_region(NULL); |
| 342 | 5977 } else { |
| 5978 int index = cur->young_index_in_cset(); | |
|
4090
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|
5979 assert(index == -1, "invariant"); |
| 342 | 5980 } |
| 5981 | |
| 5982 assert( (cur->is_young() && cur->young_index_in_cset() > -1) || | |
| 5983 (!cur->is_young() && cur->young_index_in_cset() == -1), | |
| 5984 "invariant" ); | |
| 5985 | |
| 5986 if (!cur->evacuation_failed()) { | |
|
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
5987 MemRegion used_mr = cur->used_region(); |
|
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|
5988 |
| 342 | 5989 // And the region is empty. |
|
4097
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|
5990 assert(!used_mr.is_empty(), "Should not have empty regions in a CS."); |
|
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|
5991 pre_used += cur->used(); |
|
17755
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8027295: Free CSet takes ~50% of young pause time
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diff
changeset
|
5992 free_region(cur, &local_free_list, false /* par */, true /* locked */); |
| 342 | 5993 } else { |
| 5994 cur->uninstall_surv_rate_group(); | |
|
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|
5995 if (cur->is_young()) { |
| 342 | 5996 cur->set_young_index_in_cset(-1); |
|
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|
5997 } |
| 342 | 5998 cur->set_not_young(); |
| 5999 cur->set_evacuation_failed(false); | |
| 4072 | 6000 // The region is now considered to be old. |
| 6001 _old_set.add(cur); | |
| 10405 | 6002 evacuation_info.increment_collectionset_used_after(cur->used()); |
| 342 | 6003 } |
| 6004 cur = next; | |
| 6005 } | |
| 6006 | |
| 10405 | 6007 evacuation_info.set_regions_freed(local_free_list.length()); |
| 342 | 6008 policy->record_max_rs_lengths(rs_lengths); |
| 6009 policy->cset_regions_freed(); | |
| 6010 | |
| 6011 double end_sec = os::elapsedTime(); | |
| 6012 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
|
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|
6013 |
|
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|
6014 if (non_young) { |
| 342 | 6015 non_young_time_ms += elapsed_ms; |
|
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|
6016 } else { |
| 342 | 6017 young_time_ms += elapsed_ms; |
|
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|
6018 } |
| 342 | 6019 |
|
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|
6020 prepend_to_freelist(&local_free_list); |
|
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|
6021 decrement_summary_bytes(pre_used); |
|
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
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changeset
|
6022 policy->phase_times()->record_young_free_cset_time_ms(young_time_ms); |
|
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|
6023 policy->phase_times()->record_non_young_free_cset_time_ms(non_young_time_ms); |
| 342 | 6024 } |
| 6025 | |
|
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|
6026 // This routine is similar to the above but does not record |
|
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|
6027 // any policy statistics or update free lists; we are abandoning |
|
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|
6028 // the current incremental collection set in preparation of a |
|
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|
6029 // full collection. After the full GC we will start to build up |
|
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|
6030 // the incremental collection set again. |
|
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|
6031 // This is only called when we're doing a full collection |
|
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|
6032 // and is immediately followed by the tearing down of the young list. |
|
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|
6033 |
|
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6034 void G1CollectedHeap::abandon_collection_set(HeapRegion* cs_head) { |
|
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|
6035 HeapRegion* cur = cs_head; |
|
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|
6036 |
|
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changeset
|
6037 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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diff
changeset
|
6038 HeapRegion* next = cur->next_in_collection_set(); |
|
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changeset
|
6039 assert(cur->in_collection_set(), "bad CS"); |
|
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|
6040 cur->set_next_in_collection_set(NULL); |
|
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|
6041 cur->set_in_collection_set(false); |
|
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changeset
|
6042 cur->set_young_index_in_cset(-1); |
|
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|
6043 cur = next; |
|
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|
6044 } |
|
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|
6045 } |
|
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|
6046 |
| 2152 | 6047 void G1CollectedHeap::set_free_regions_coming() { |
| 6048 if (G1ConcRegionFreeingVerbose) { | |
| 6049 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
| 6050 "setting free regions coming"); | |
| 6051 } | |
| 6052 | |
| 6053 assert(!free_regions_coming(), "pre-condition"); | |
| 6054 _free_regions_coming = true; | |
| 342 | 6055 } |
| 6056 | |
| 2152 | 6057 void G1CollectedHeap::reset_free_regions_coming() { |
|
4837
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7127706: G1: re-enable survivors during the initial-mark pause
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4836
diff
changeset
|
6058 assert(free_regions_coming(), "pre-condition"); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
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|
6059 |
| 2152 | 6060 { |
| 6061 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
| 6062 _free_regions_coming = false; | |
| 6063 SecondaryFreeList_lock->notify_all(); | |
| 6064 } | |
| 6065 | |
| 6066 if (G1ConcRegionFreeingVerbose) { | |
| 6067 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
| 6068 "reset free regions coming"); | |
| 342 | 6069 } |
| 6070 } | |
| 6071 | |
| 2152 | 6072 void G1CollectedHeap::wait_while_free_regions_coming() { |
| 6073 // Most of the time we won't have to wait, so let's do a quick test | |
| 6074 // first before we take the lock. | |
| 6075 if (!free_regions_coming()) { | |
| 6076 return; | |
| 6077 } | |
| 6078 | |
| 6079 if (G1ConcRegionFreeingVerbose) { | |
| 6080 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
| 6081 "waiting for free regions"); | |
| 342 | 6082 } |
| 6083 | |
| 6084 { | |
| 2152 | 6085 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
| 6086 while (free_regions_coming()) { | |
| 6087 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
| 342 | 6088 } |
| 2152 | 6089 } |
| 6090 | |
| 6091 if (G1ConcRegionFreeingVerbose) { | |
| 6092 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
| 6093 "done waiting for free regions"); | |
| 6094 } | |
| 342 | 6095 } |
| 6096 | |
| 6097 void G1CollectedHeap::set_region_short_lived_locked(HeapRegion* hr) { | |
| 6098 assert(heap_lock_held_for_gc(), | |
| 6099 "the heap lock should already be held by or for this thread"); | |
| 6100 _young_list->push_region(hr); | |
| 6101 } | |
| 6102 | |
| 6103 class NoYoungRegionsClosure: public HeapRegionClosure { | |
| 6104 private: | |
| 6105 bool _success; | |
| 6106 public: | |
| 6107 NoYoungRegionsClosure() : _success(true) { } | |
| 6108 bool doHeapRegion(HeapRegion* r) { | |
| 6109 if (r->is_young()) { | |
| 6110 gclog_or_tty->print_cr("Region ["PTR_FORMAT", "PTR_FORMAT") tagged as young", | |
| 6111 r->bottom(), r->end()); | |
| 6112 _success = false; | |
| 6113 } | |
| 6114 return false; | |
| 6115 } | |
| 6116 bool success() { return _success; } | |
| 6117 }; | |
| 6118 | |
|
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|
6119 bool G1CollectedHeap::check_young_list_empty(bool check_heap, bool check_sample) { |
|
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diff
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|
6120 bool ret = _young_list->check_list_empty(check_sample); |
|
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|
6121 |
|
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|
6122 if (check_heap) { |
| 342 | 6123 NoYoungRegionsClosure closure; |
| 6124 heap_region_iterate(&closure); | |
| 6125 ret = ret && closure.success(); | |
| 6126 } | |
| 6127 | |
| 6128 return ret; | |
| 6129 } | |
| 6130 | |
| 4072 | 6131 class TearDownRegionSetsClosure : public HeapRegionClosure { |
| 6132 private: | |
|
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|
6133 HeapRegionSet *_old_set; |
| 2152 | 6134 |
| 342 | 6135 public: |
|
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8034079: G1: Refactor the HeapRegionSet hierarchy
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diff
changeset
|
6136 TearDownRegionSetsClosure(HeapRegionSet* old_set) : _old_set(old_set) { } |
| 2152 | 6137 |
| 342 | 6138 bool doHeapRegion(HeapRegion* r) { |
| 4072 | 6139 if (r->is_empty()) { |
| 6140 // We ignore empty regions, we'll empty the free list afterwards | |
| 6141 } else if (r->is_young()) { | |
| 6142 // We ignore young regions, we'll empty the young list afterwards | |
| 6143 } else if (r->isHumongous()) { | |
| 6144 // We ignore humongous regions, we're not tearing down the | |
| 6145 // humongous region set | |
| 342 | 6146 } else { |
| 4072 | 6147 // The rest should be old |
| 6148 _old_set->remove(r); | |
| 342 | 6149 } |
| 6150 return false; | |
| 6151 } | |
| 6152 | |
| 4072 | 6153 ~TearDownRegionSetsClosure() { |
| 6154 assert(_old_set->is_empty(), "post-condition"); | |
| 2152 | 6155 } |
| 342 | 6156 }; |
| 6157 | |
| 4072 | 6158 void G1CollectedHeap::tear_down_region_sets(bool free_list_only) { |
| 6159 assert_at_safepoint(true /* should_be_vm_thread */); | |
| 6160 | |
| 6161 if (!free_list_only) { | |
| 6162 TearDownRegionSetsClosure cl(&_old_set); | |
| 6163 heap_region_iterate(&cl); | |
| 6164 | |
| 17764 | 6165 // Note that emptying the _young_list is postponed and instead done as |
| 6166 // the first step when rebuilding the regions sets again. The reason for | |
| 6167 // this is that during a full GC string deduplication needs to know if | |
| 6168 // a collected region was young or old when the full GC was initiated. | |
| 4072 | 6169 } |
| 6170 _free_list.remove_all(); | |
| 6171 } | |
| 6172 | |
| 6173 class RebuildRegionSetsClosure : public HeapRegionClosure { | |
| 6174 private: | |
| 6175 bool _free_list_only; | |
|
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|
6176 HeapRegionSet* _old_set; |
| 4072 | 6177 FreeRegionList* _free_list; |
| 6178 size_t _total_used; | |
| 6179 | |
| 6180 public: | |
| 6181 RebuildRegionSetsClosure(bool free_list_only, | |
|
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|
6182 HeapRegionSet* old_set, FreeRegionList* free_list) : |
| 4072 | 6183 _free_list_only(free_list_only), |
| 6184 _old_set(old_set), _free_list(free_list), _total_used(0) { | |
| 6185 assert(_free_list->is_empty(), "pre-condition"); | |
| 6186 if (!free_list_only) { | |
| 6187 assert(_old_set->is_empty(), "pre-condition"); | |
| 6188 } | |
| 6189 } | |
| 6190 | |
| 6191 bool doHeapRegion(HeapRegion* r) { | |
| 6192 if (r->continuesHumongous()) { | |
| 6193 return false; | |
| 6194 } | |
| 6195 | |
| 6196 if (r->is_empty()) { | |
| 6197 // Add free regions to the free list | |
| 6198 _free_list->add_as_tail(r); | |
| 6199 } else if (!_free_list_only) { | |
| 6200 assert(!r->is_young(), "we should not come across young regions"); | |
| 6201 | |
| 6202 if (r->isHumongous()) { | |
| 6203 // We ignore humongous regions, we left the humongous set unchanged | |
| 6204 } else { | |
| 6205 // The rest should be old, add them to the old set | |
| 6206 _old_set->add(r); | |
| 6207 } | |
| 6208 _total_used += r->used(); | |
| 6209 } | |
| 6210 | |
| 6211 return false; | |
| 6212 } | |
| 6213 | |
| 6214 size_t total_used() { | |
| 6215 return _total_used; | |
| 6216 } | |
| 6217 }; | |
| 6218 | |
| 6219 void G1CollectedHeap::rebuild_region_sets(bool free_list_only) { | |
| 6220 assert_at_safepoint(true /* should_be_vm_thread */); | |
| 6221 | |
| 17764 | 6222 if (!free_list_only) { |
| 6223 _young_list->empty_list(); | |
| 6224 } | |
| 6225 | |
| 4072 | 6226 RebuildRegionSetsClosure cl(free_list_only, &_old_set, &_free_list); |
| 6227 heap_region_iterate(&cl); | |
| 6228 | |
| 6229 if (!free_list_only) { | |
| 6230 _summary_bytes_used = cl.total_used(); | |
| 6231 } | |
| 6232 assert(_summary_bytes_used == recalculate_used(), | |
| 6233 err_msg("inconsistent _summary_bytes_used, " | |
| 6234 "value: "SIZE_FORMAT" recalculated: "SIZE_FORMAT, | |
| 6235 _summary_bytes_used, recalculate_used())); | |
| 342 | 6236 } |
| 6237 | |
| 6238 void G1CollectedHeap::set_refine_cte_cl_concurrency(bool concurrent) { | |
| 6239 _refine_cte_cl->set_concurrent(concurrent); | |
| 6240 } | |
| 6241 | |
| 6242 bool G1CollectedHeap::is_in_closed_subset(const void* p) const { | |
| 6243 HeapRegion* hr = heap_region_containing(p); | |
| 6244 if (hr == NULL) { | |
|
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coleenp
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6629
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|
6245 return false; |
| 342 | 6246 } else { |
| 6247 return hr->is_in(p); | |
| 6248 } | |
| 6249 } | |
| 2152 | 6250 |
|
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|
6251 // Methods for the mutator alloc region |
|
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|
6252 |
|
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changeset
|
6253 HeapRegion* G1CollectedHeap::new_mutator_alloc_region(size_t word_size, |
|
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|
6254 bool force) { |
|
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|
6255 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
|
abdfc822206f
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diff
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|
6256 assert(!force || g1_policy()->can_expand_young_list(), |
|
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2432
diff
changeset
|
6257 "if force is true we should be able to expand the young list"); |
|
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3777
diff
changeset
|
6258 bool young_list_full = g1_policy()->is_young_list_full(); |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6259 if (force || !young_list_full) { |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6260 HeapRegion* new_alloc_region = new_region(word_size, |
|
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
17759
diff
changeset
|
6261 false /* is_old */, |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6262 false /* do_expand */); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6263 if (new_alloc_region != NULL) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6264 set_region_short_lived_locked(new_alloc_region); |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6265 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Eden, young_list_full); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6266 return new_alloc_region; |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6267 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6268 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6269 return NULL; |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6270 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6271 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6272 void G1CollectedHeap::retire_mutator_alloc_region(HeapRegion* alloc_region, |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6273 size_t allocated_bytes) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6274 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6275 assert(alloc_region->is_young(), "all mutator alloc regions should be young"); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6276 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6277 g1_policy()->add_region_to_incremental_cset_lhs(alloc_region); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6278 _summary_bytes_used += allocated_bytes; |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6279 _hr_printer.retire(alloc_region); |
|
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6280 // 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
|
6281 // 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
|
6282 // used space has been recored in _summary_bytes_used. |
|
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6283 g1mm()->update_eden_size(); |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6284 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6285 |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6286 HeapRegion* MutatorAllocRegion::allocate_new_region(size_t word_size, |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6287 bool force) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6288 return _g1h->new_mutator_alloc_region(word_size, force); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6289 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6290 |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6291 void G1CollectedHeap::set_par_threads() { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6292 // 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
|
6293 // in the workgroup. |
| 4711 | 6294 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
|
6295 uint n_workers = workers()->active_workers(); |
| 4711 | 6296 assert(UseDynamicNumberOfGCThreads || |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6297 n_workers == workers()->total_workers(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6298 "Otherwise should be using the total number of workers"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6299 if (n_workers == 0) { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6300 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
|
6301 n_workers = ParallelGCThreads; |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6302 workers()->set_active_workers(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6303 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6304 set_par_threads(n_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6305 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6306 |
|
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6307 void MutatorAllocRegion::retire_region(HeapRegion* alloc_region, |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6308 size_t allocated_bytes) { |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6309 _g1h->retire_mutator_alloc_region(alloc_region, allocated_bytes); |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6310 } |
|
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6311 |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6312 // 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
|
6313 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6314 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
|
6315 uint count, |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6316 GCAllocPurpose ap) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6317 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
|
6318 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6319 if (count < g1_policy()->max_regions(ap)) { |
|
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
17759
diff
changeset
|
6320 bool survivor = (ap == GCAllocForSurvived); |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6321 HeapRegion* new_alloc_region = new_region(word_size, |
|
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
17759
diff
changeset
|
6322 !survivor, |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6323 true /* do_expand */); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6324 if (new_alloc_region != NULL) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6325 // 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
|
6326 // 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
|
6327 // for survivors too. |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6328 new_alloc_region->set_saved_mark(); |
|
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
17759
diff
changeset
|
6329 if (survivor) { |
|
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6330 new_alloc_region->set_survivor(); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6331 _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
|
6332 } else { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6333 _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
|
6334 } |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
6335 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
|
6336 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
|
6337 return new_alloc_region; |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6338 } else { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6339 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
|
6340 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6341 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6342 return NULL; |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6343 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6344 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6345 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
|
6346 size_t allocated_bytes, |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6347 GCAllocPurpose ap) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
6348 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
|
6349 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
|
6350 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
|
6351 if (ap == GCAllocForSurvived) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6352 young_list()->add_survivor_region(alloc_region); |
| 4072 | 6353 } else { |
| 6354 _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
|
6355 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6356 _hr_printer.retire(alloc_region); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6357 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6358 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6359 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
|
6360 bool force) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6361 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
|
6362 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
|
6363 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6364 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6365 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
|
6366 size_t allocated_bytes) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6367 _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
|
6368 GCAllocForSurvived); |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6369 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6370 |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6371 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
|
6372 bool force) { |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6373 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
|
6374 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
|
6375 } |
|
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6376 |
|
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|
6377 void OldGCAllocRegion::retire_region(HeapRegion* alloc_region, |
|
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|
6378 size_t allocated_bytes) { |
|
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|
6379 _g1h->retire_gc_alloc_region(alloc_region, allocated_bytes, |
|
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|
6380 GCAllocForTenured); |
|
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|
6381 } |
|
2433
abdfc822206f
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|
6382 // Heap region set verification |
|
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|
6383 |
| 2152 | 6384 class VerifyRegionListsClosure : public HeapRegionClosure { |
| 6385 private: | |
|
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|
6386 HeapRegionSet* _old_set; |
|
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|
6387 HeapRegionSet* _humongous_set; |
|
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|
6388 FreeRegionList* _free_list; |
| 2152 | 6389 |
| 6390 public: | |
|
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|
6391 HeapRegionSetCount _old_count; |
|
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|
6392 HeapRegionSetCount _humongous_count; |
|
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|
6393 HeapRegionSetCount _free_count; |
|
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|
6394 |
|
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|
6395 VerifyRegionListsClosure(HeapRegionSet* old_set, |
|
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|
6396 HeapRegionSet* humongous_set, |
| 2152 | 6397 FreeRegionList* free_list) : |
|
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|
6398 _old_set(old_set), _humongous_set(humongous_set), _free_list(free_list), |
|
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|
6399 _old_count(), _humongous_count(), _free_count(){ } |
| 2152 | 6400 |
| 6401 bool doHeapRegion(HeapRegion* hr) { | |
| 6402 if (hr->continuesHumongous()) { | |
| 6403 return false; | |
| 6404 } | |
| 6405 | |
| 6406 if (hr->is_young()) { | |
| 6407 // TODO | |
| 6408 } else if (hr->startsHumongous()) { | |
|
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|
6409 assert(hr->containing_set() == _humongous_set, err_msg("Heap region %u is starts humongous but not in humongous set.", hr->region_num())); |
|
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|
6410 _humongous_count.increment(1u, hr->capacity()); |
| 2152 | 6411 } else if (hr->is_empty()) { |
|
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|
6412 assert(hr->containing_set() == _free_list, err_msg("Heap region %u is empty but not on the free list.", hr->region_num())); |
|
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|
6413 _free_count.increment(1u, hr->capacity()); |
| 4072 | 6414 } else { |
|
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|
6415 assert(hr->containing_set() == _old_set, err_msg("Heap region %u is old but not in the old set.", hr->region_num())); |
|
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|
6416 _old_count.increment(1u, hr->capacity()); |
| 2152 | 6417 } |
| 6418 return false; | |
| 6419 } | |
|
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|
6420 |
|
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|
6421 void verify_counts(HeapRegionSet* old_set, HeapRegionSet* humongous_set, FreeRegionList* free_list) { |
|
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|
6422 guarantee(old_set->length() == _old_count.length(), err_msg("Old set count mismatch. Expected %u, actual %u.", old_set->length(), _old_count.length())); |
|
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|
6423 guarantee(old_set->total_capacity_bytes() == _old_count.capacity(), err_msg("Old set capacity mismatch. Expected " SIZE_FORMAT ", actual " SIZE_FORMAT, |
|
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|
6424 old_set->total_capacity_bytes(), _old_count.capacity())); |
|
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|
6425 |
|
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|
6426 guarantee(humongous_set->length() == _humongous_count.length(), err_msg("Hum set count mismatch. Expected %u, actual %u.", humongous_set->length(), _humongous_count.length())); |
|
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|
6427 guarantee(humongous_set->total_capacity_bytes() == _humongous_count.capacity(), err_msg("Hum set capacity mismatch. Expected " SIZE_FORMAT ", actual " SIZE_FORMAT, |
|
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|
6428 humongous_set->total_capacity_bytes(), _humongous_count.capacity())); |
|
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|
6429 |
|
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|
6430 guarantee(free_list->length() == _free_count.length(), err_msg("Free list count mismatch. Expected %u, actual %u.", free_list->length(), _free_count.length())); |
|
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|
6431 guarantee(free_list->total_capacity_bytes() == _free_count.capacity(), err_msg("Free list capacity mismatch. Expected " SIZE_FORMAT ", actual " SIZE_FORMAT, |
|
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|
6432 free_list->total_capacity_bytes(), _free_count.capacity())); |
|
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|
6433 } |
| 2152 | 6434 }; |
| 6435 | |
|
6010
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diff
changeset
|
6436 HeapRegion* G1CollectedHeap::new_heap_region(uint hrs_index, |
| 3766 | 6437 HeapWord* bottom) { |
| 6438 HeapWord* end = bottom + HeapRegion::GrainWords; | |
| 6439 MemRegion mr(bottom, end); | |
| 6440 assert(_g1_reserved.contains(mr), "invariant"); | |
| 6441 // This might return NULL if the allocation fails | |
|
6754
8fbf05030e24
7016955: G1: remove the is_zeroed parameter from the HeapRegion constructor
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6752
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changeset
|
6442 return new HeapRegion(hrs_index, _bot_shared, mr); |
| 3766 | 6443 } |
| 6444 | |
| 2152 | 6445 void G1CollectedHeap::verify_region_sets() { |
| 6446 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); | |
| 6447 | |
| 6448 // First, check the explicit lists. | |
|
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|
6449 _free_list.verify_list(); |
| 2152 | 6450 { |
| 6451 // Given that a concurrent operation might be adding regions to | |
| 6452 // the secondary free list we have to take the lock before | |
| 6453 // verifying it. | |
| 6454 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
|
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|
6455 _secondary_free_list.verify_list(); |
|
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|
6456 } |
| 2152 | 6457 |
| 6458 // If a concurrent region freeing operation is in progress it will | |
| 6459 // be difficult to correctly attributed any free regions we come | |
| 6460 // across to the correct free list given that they might belong to | |
| 6461 // one of several (free_list, secondary_free_list, any local lists, | |
| 6462 // etc.). So, if that's the case we will skip the rest of the | |
| 6463 // verification operation. Alternatively, waiting for the concurrent | |
| 6464 // operation to complete will have a non-trivial effect on the GC's | |
| 6465 // operation (no concurrent operation will last longer than the | |
| 6466 // interval between two calls to verification) and it might hide | |
| 6467 // any issues that we would like to catch during testing. | |
| 6468 if (free_regions_coming()) { | |
| 6469 return; | |
| 6470 } | |
| 6471 | |
| 2361 | 6472 // Make sure we append the secondary_free_list on the free_list so |
| 6473 // that all free regions we will come across can be safely | |
| 6474 // attributed to the free_list. | |
| 6475 append_secondary_free_list_if_not_empty_with_lock(); | |
| 2152 | 6476 |
| 6477 // Finally, make sure that the region accounting in the lists is | |
| 6478 // consistent with what we see in the heap. | |
| 6479 | |
| 4072 | 6480 VerifyRegionListsClosure cl(&_old_set, &_humongous_set, &_free_list); |
| 2152 | 6481 heap_region_iterate(&cl); |
|
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|
6482 cl.verify_counts(&_old_set, &_humongous_set, &_free_list); |
| 342 | 6483 } |
| 12080 | 6484 |
| 6485 // Optimized nmethod scanning | |
| 6486 | |
| 6487 class RegisterNMethodOopClosure: public OopClosure { | |
| 6488 G1CollectedHeap* _g1h; | |
| 6489 nmethod* _nm; | |
| 6490 | |
| 6491 template <class T> void do_oop_work(T* p) { | |
| 6492 T heap_oop = oopDesc::load_heap_oop(p); | |
| 6493 if (!oopDesc::is_null(heap_oop)) { | |
| 6494 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 6495 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
|
13062
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|
6496 assert(!hr->continuesHumongous(), |
|
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|
6497 err_msg("trying to add code root "PTR_FORMAT" in continuation of humongous region "HR_FORMAT |
|
28674af341ac
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|
6498 " starting at "HR_FORMAT, |
|
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|
6499 _nm, HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()))); |
| 12080 | 6500 |
| 6501 // HeapRegion::add_strong_code_root() avoids adding duplicate | |
| 6502 // entries but having duplicates is OK since we "mark" nmethods | |
| 6503 // as visited when we scan the strong code root lists during the GC. | |
| 6504 hr->add_strong_code_root(_nm); | |
|
13062
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|
6505 assert(hr->rem_set()->strong_code_roots_list_contains(_nm), |
|
28674af341ac
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|
6506 err_msg("failed to add code root "PTR_FORMAT" to remembered set of region "HR_FORMAT, |
|
28674af341ac
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changeset
|
6507 _nm, HR_FORMAT_PARAMS(hr))); |
| 12080 | 6508 } |
| 6509 } | |
| 6510 | |
| 6511 public: | |
| 6512 RegisterNMethodOopClosure(G1CollectedHeap* g1h, nmethod* nm) : | |
| 6513 _g1h(g1h), _nm(nm) {} | |
| 6514 | |
| 6515 void do_oop(oop* p) { do_oop_work(p); } | |
| 6516 void do_oop(narrowOop* p) { do_oop_work(p); } | |
| 6517 }; | |
| 6518 | |
| 6519 class UnregisterNMethodOopClosure: public OopClosure { | |
| 6520 G1CollectedHeap* _g1h; | |
| 6521 nmethod* _nm; | |
| 6522 | |
| 6523 template <class T> void do_oop_work(T* p) { | |
| 6524 T heap_oop = oopDesc::load_heap_oop(p); | |
| 6525 if (!oopDesc::is_null(heap_oop)) { | |
| 6526 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 6527 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
|
13062
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changeset
|
6528 assert(!hr->continuesHumongous(), |
|
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changeset
|
6529 err_msg("trying to remove code root "PTR_FORMAT" in continuation of humongous region "HR_FORMAT |
|
28674af341ac
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changeset
|
6530 " starting at "HR_FORMAT, |
|
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changeset
|
6531 _nm, HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()))); |
|
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|
6532 |
| 12080 | 6533 hr->remove_strong_code_root(_nm); |
|
13062
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|
6534 assert(!hr->rem_set()->strong_code_roots_list_contains(_nm), |
|
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changeset
|
6535 err_msg("failed to remove code root "PTR_FORMAT" of region "HR_FORMAT, |
|
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|
6536 _nm, HR_FORMAT_PARAMS(hr))); |
| 12080 | 6537 } |
| 6538 } | |
| 6539 | |
| 6540 public: | |
| 6541 UnregisterNMethodOopClosure(G1CollectedHeap* g1h, nmethod* nm) : | |
| 6542 _g1h(g1h), _nm(nm) {} | |
| 6543 | |
| 6544 void do_oop(oop* p) { do_oop_work(p); } | |
| 6545 void do_oop(narrowOop* p) { do_oop_work(p); } | |
| 6546 }; | |
| 6547 | |
| 6548 void G1CollectedHeap::register_nmethod(nmethod* nm) { | |
| 6549 CollectedHeap::register_nmethod(nm); | |
| 6550 | |
| 6551 guarantee(nm != NULL, "sanity"); | |
| 6552 RegisterNMethodOopClosure reg_cl(this, nm); | |
| 6553 nm->oops_do(®_cl); | |
| 6554 } | |
| 6555 | |
| 6556 void G1CollectedHeap::unregister_nmethod(nmethod* nm) { | |
| 6557 CollectedHeap::unregister_nmethod(nm); | |
| 6558 | |
| 6559 guarantee(nm != NULL, "sanity"); | |
| 6560 UnregisterNMethodOopClosure reg_cl(this, nm); | |
| 6561 nm->oops_do(®_cl, true); | |
| 6562 } | |
| 6563 | |
| 6564 class MigrateCodeRootsHeapRegionClosure: public HeapRegionClosure { | |
| 6565 public: | |
| 6566 bool doHeapRegion(HeapRegion *hr) { | |
|
13062
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|
6567 assert(!hr->isHumongous(), |
|
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changeset
|
6568 err_msg("humongous region "HR_FORMAT" should not have been added to collection set", |
|
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|
6569 HR_FORMAT_PARAMS(hr))); |
| 12080 | 6570 hr->migrate_strong_code_roots(); |
| 6571 return false; | |
| 6572 } | |
| 6573 }; | |
| 6574 | |
| 6575 void G1CollectedHeap::migrate_strong_code_roots() { | |
| 6576 MigrateCodeRootsHeapRegionClosure cl; | |
| 6577 double migrate_start = os::elapsedTime(); | |
| 6578 collection_set_iterate(&cl); | |
| 6579 double migration_time_ms = (os::elapsedTime() - migrate_start) * 1000.0; | |
| 6580 g1_policy()->phase_times()->record_strong_code_root_migration_time(migration_time_ms); | |
| 6581 } | |
| 6582 | |
|
17753
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diff
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|
6583 void G1CollectedHeap::purge_code_root_memory() { |
|
191174b49bec
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tschatzl
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17749
diff
changeset
|
6584 double purge_start = os::elapsedTime(); |
|
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tschatzl
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17749
diff
changeset
|
6585 G1CodeRootSet::purge_chunks(G1CodeRootsChunkCacheKeepPercent); |
|
191174b49bec
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changeset
|
6586 double purge_time_ms = (os::elapsedTime() - purge_start) * 1000.0; |
|
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changeset
|
6587 g1_policy()->phase_times()->record_strong_code_root_purge_time(purge_time_ms); |
|
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tschatzl
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changeset
|
6588 } |
|
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changeset
|
6589 |
| 12080 | 6590 // Mark all the code roots that point into regions *not* in the |
| 6591 // collection set. | |
| 6592 // | |
| 6593 // Note we do not want to use a "marking" CodeBlobToOopClosure while | |
| 6594 // walking the the code roots lists of regions not in the collection | |
| 6595 // set. Suppose we have an nmethod (M) that points to objects in two | |
| 6596 // separate regions - one in the collection set (R1) and one not (R2). | |
| 6597 // Using a "marking" CodeBlobToOopClosure here would result in "marking" | |
| 6598 // nmethod M when walking the code roots for R1. When we come to scan | |
| 6599 // the code roots for R2, we would see that M is already marked and it | |
| 6600 // would be skipped and the objects in R2 that are referenced from M | |
| 6601 // would not be evacuated. | |
| 6602 | |
| 6603 class MarkStrongCodeRootCodeBlobClosure: public CodeBlobClosure { | |
| 6604 | |
| 6605 class MarkStrongCodeRootOopClosure: public OopClosure { | |
| 6606 ConcurrentMark* _cm; | |
| 6607 HeapRegion* _hr; | |
| 6608 uint _worker_id; | |
| 6609 | |
| 6610 template <class T> void do_oop_work(T* p) { | |
| 6611 T heap_oop = oopDesc::load_heap_oop(p); | |
| 6612 if (!oopDesc::is_null(heap_oop)) { | |
| 6613 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
| 6614 // Only mark objects in the region (which is assumed | |
| 6615 // to be not in the collection set). | |
| 6616 if (_hr->is_in(obj)) { | |
| 6617 _cm->grayRoot(obj, (size_t) obj->size(), _worker_id); | |
| 6618 } | |
| 6619 } | |
| 6620 } | |
| 6621 | |
| 6622 public: | |
| 6623 MarkStrongCodeRootOopClosure(ConcurrentMark* cm, HeapRegion* hr, uint worker_id) : | |
| 6624 _cm(cm), _hr(hr), _worker_id(worker_id) { | |
| 6625 assert(!_hr->in_collection_set(), "sanity"); | |
| 6626 } | |
| 6627 | |
| 6628 void do_oop(narrowOop* p) { do_oop_work(p); } | |
| 6629 void do_oop(oop* p) { do_oop_work(p); } | |
| 6630 }; | |
| 6631 | |
| 6632 MarkStrongCodeRootOopClosure _oop_cl; | |
| 6633 | |
| 6634 public: | |
| 6635 MarkStrongCodeRootCodeBlobClosure(ConcurrentMark* cm, HeapRegion* hr, uint worker_id): | |
| 6636 _oop_cl(cm, hr, worker_id) {} | |
| 6637 | |
| 6638 void do_code_blob(CodeBlob* cb) { | |
| 6639 nmethod* nm = (cb == NULL) ? NULL : cb->as_nmethod_or_null(); | |
| 6640 if (nm != NULL) { | |
| 6641 nm->oops_do(&_oop_cl); | |
| 6642 } | |
| 6643 } | |
| 6644 }; | |
| 6645 | |
| 6646 class MarkStrongCodeRootsHRClosure: public HeapRegionClosure { | |
| 6647 G1CollectedHeap* _g1h; | |
| 6648 uint _worker_id; | |
| 6649 | |
| 6650 public: | |
| 6651 MarkStrongCodeRootsHRClosure(G1CollectedHeap* g1h, uint worker_id) : | |
| 6652 _g1h(g1h), _worker_id(worker_id) {} | |
| 6653 | |
| 6654 bool doHeapRegion(HeapRegion *hr) { | |
| 6655 HeapRegionRemSet* hrrs = hr->rem_set(); | |
|
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|
6656 if (hr->continuesHumongous()) { |
|
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6657 // Code roots should never be attached to a continuation of a humongous region |
|
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6658 assert(hrrs->strong_code_roots_list_length() == 0, |
|
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6659 err_msg("code roots should never be attached to continuations of humongous region "HR_FORMAT |
|
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|
6660 " starting at "HR_FORMAT", but has "SIZE_FORMAT, |
|
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|
6661 HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()), |
|
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|
6662 hrrs->strong_code_roots_list_length())); |
| 12080 | 6663 return false; |
| 6664 } | |
| 6665 | |
| 6666 if (hr->in_collection_set()) { | |
| 6667 // Don't mark code roots into regions in the collection set here. | |
| 6668 // They will be marked when we scan them. | |
| 6669 return false; | |
| 6670 } | |
| 6671 | |
| 6672 MarkStrongCodeRootCodeBlobClosure cb_cl(_g1h->concurrent_mark(), hr, _worker_id); | |
| 6673 hr->strong_code_roots_do(&cb_cl); | |
| 6674 return false; | |
| 6675 } | |
| 6676 }; | |
| 6677 | |
| 6678 void G1CollectedHeap::mark_strong_code_roots(uint worker_id) { | |
| 6679 MarkStrongCodeRootsHRClosure cl(this, worker_id); | |
|
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|
6680 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
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|
6681 heap_region_par_iterate_chunked(&cl, |
|
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|
6682 worker_id, |
|
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|
6683 workers()->active_workers(), |
|
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|
6684 HeapRegion::ParMarkRootClaimValue); |
|
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|
6685 } else { |
|
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|
6686 heap_region_iterate(&cl); |
|
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|
6687 } |
| 12080 | 6688 } |
| 6689 | |
| 6690 class RebuildStrongCodeRootClosure: public CodeBlobClosure { | |
| 6691 G1CollectedHeap* _g1h; | |
| 6692 | |
| 6693 public: | |
| 6694 RebuildStrongCodeRootClosure(G1CollectedHeap* g1h) : | |
| 6695 _g1h(g1h) {} | |
| 6696 | |
| 6697 void do_code_blob(CodeBlob* cb) { | |
| 6698 nmethod* nm = (cb != NULL) ? cb->as_nmethod_or_null() : NULL; | |
| 6699 if (nm == NULL) { | |
| 6700 return; | |
| 6701 } | |
| 6702 | |
|
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diff
changeset
|
6703 if (ScavengeRootsInCode) { |
| 12080 | 6704 _g1h->register_nmethod(nm); |
| 6705 } | |
| 6706 } | |
| 6707 }; | |
| 6708 | |
| 6709 void G1CollectedHeap::rebuild_strong_code_roots() { | |
| 6710 RebuildStrongCodeRootClosure blob_cl(this); | |
| 6711 CodeCache::blobs_do(&blob_cl); | |
| 6712 } |