Mercurial > hg > graal-compiler
annotate src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp @ 20331:18bf0b66de52
8044406: JVM crash with JDK8 (build 1.8.0-b132) with G1 GC
Summary: Fill the last card that has been allocated into with a dummy object
Reviewed-by: tschatzl, mgerdin
author | poonam |
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date | Tue, 19 Aug 2014 02:05:49 -0700 |
parents | bfba6779654b |
children | ff3169f25621 |
rev | line source |
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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" |
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58 #include "memory/allocation.hpp" |
1972 | 59 #include "memory/gcLocker.inline.hpp" |
60 #include "memory/generationSpec.hpp" | |
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61 #include "memory/iterator.hpp" |
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62 #include "memory/referenceProcessor.hpp" |
1972 | 63 #include "oops/oop.inline.hpp" |
64 #include "oops/oop.pcgc.inline.hpp" | |
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65 #include "runtime/orderAccess.inline.hpp" |
1972 | 66 #include "runtime/vmThread.hpp" |
342 | 67 |
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68 size_t G1CollectedHeap::_humongous_object_threshold_in_words = 0; |
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69 |
342 | 70 // turn it on so that the contents of the young list (scan-only / |
71 // to-be-collected) are printed at "strategic" points before / during | |
72 // / after the collection --- this is useful for debugging | |
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73 #define YOUNG_LIST_VERBOSE 0 |
342 | 74 // CURRENT STATUS |
75 // This file is under construction. Search for "FIXME". | |
76 | |
77 // INVARIANTS/NOTES | |
78 // | |
79 // All allocation activity covered by the G1CollectedHeap interface is | |
1973 | 80 // serialized by acquiring the HeapLock. This happens in mem_allocate |
81 // and allocate_new_tlab, which are the "entry" points to the | |
82 // allocation code from the rest of the JVM. (Note that this does not | |
83 // apply to TLAB allocation, which is not part of this interface: it | |
84 // is done by clients of this interface.) | |
342 | 85 |
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86 // Notes on implementation of parallelism in different tasks. |
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87 // |
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88 // G1ParVerifyTask uses heap_region_par_iterate_chunked() for parallelism. |
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89 // The number of GC workers is passed to heap_region_par_iterate_chunked(). |
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90 // It does use run_task() which sets _n_workers in the task. |
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91 // G1ParTask executes g1_process_roots() -> |
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92 // SharedHeap::process_roots() which calls eventually to |
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93 // CardTableModRefBS::par_non_clean_card_iterate_work() which uses |
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94 // SequentialSubTasksDone. SharedHeap::process_roots() also |
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95 // directly uses SubTasksDone (_process_strong_tasks field in SharedHeap). |
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96 // |
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97 |
342 | 98 // Local to this file. |
99 | |
100 class RefineCardTableEntryClosure: public CardTableEntryClosure { | |
101 bool _concurrent; | |
102 public: | |
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103 RefineCardTableEntryClosure() : _concurrent(true) { } |
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104 |
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105 bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
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106 bool oops_into_cset = G1CollectedHeap::heap()->g1_rem_set()->refine_card(card_ptr, worker_i, false); |
1705 | 107 // This path is executed by the concurrent refine or mutator threads, |
108 // concurrently, and so we do not care if card_ptr contains references | |
109 // that point into the collection set. | |
110 assert(!oops_into_cset, "should be"); | |
111 | |
20192 | 112 if (_concurrent && SuspendibleThreadSet::should_yield()) { |
342 | 113 // Caller will actually yield. |
114 return false; | |
115 } | |
116 // Otherwise, we finished successfully; return true. | |
117 return true; | |
118 } | |
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119 |
342 | 120 void set_concurrent(bool b) { _concurrent = b; } |
121 }; | |
122 | |
123 | |
124 class ClearLoggedCardTableEntryClosure: public CardTableEntryClosure { | |
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125 size_t _num_processed; |
342 | 126 CardTableModRefBS* _ctbs; |
127 int _histo[256]; | |
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128 |
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129 public: |
342 | 130 ClearLoggedCardTableEntryClosure() : |
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131 _num_processed(0), _ctbs(G1CollectedHeap::heap()->g1_barrier_set()) |
342 | 132 { |
133 for (int i = 0; i < 256; i++) _histo[i] = 0; | |
134 } | |
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135 |
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136 bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
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137 unsigned char* ujb = (unsigned char*)card_ptr; |
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138 int ind = (int)(*ujb); |
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139 _histo[ind]++; |
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140 |
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141 *card_ptr = (jbyte)CardTableModRefBS::clean_card_val(); |
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142 _num_processed++; |
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143 |
342 | 144 return true; |
145 } | |
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146 |
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147 size_t num_processed() { return _num_processed; } |
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148 |
342 | 149 void print_histo() { |
150 gclog_or_tty->print_cr("Card table value histogram:"); | |
151 for (int i = 0; i < 256; i++) { | |
152 if (_histo[i] != 0) { | |
153 gclog_or_tty->print_cr(" %d: %d", i, _histo[i]); | |
154 } | |
155 } | |
156 } | |
157 }; | |
158 | |
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159 class RedirtyLoggedCardTableEntryClosure : public CardTableEntryClosure { |
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160 private: |
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161 size_t _num_processed; |
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162 |
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163 public: |
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164 RedirtyLoggedCardTableEntryClosure() : CardTableEntryClosure(), _num_processed(0) { } |
12343 | 165 |
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166 bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
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167 *card_ptr = CardTableModRefBS::dirty_card_val(); |
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168 _num_processed++; |
342 | 169 return true; |
170 } | |
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171 |
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172 size_t num_processed() const { return _num_processed; } |
342 | 173 }; |
174 | |
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175 YoungList::YoungList(G1CollectedHeap* g1h) : |
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176 _g1h(g1h), _head(NULL), _length(0), _last_sampled_rs_lengths(0), |
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177 _survivor_head(NULL), _survivor_tail(NULL), _survivor_length(0) { |
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178 guarantee(check_list_empty(false), "just making sure..."); |
342 | 179 } |
180 | |
181 void YoungList::push_region(HeapRegion *hr) { | |
182 assert(!hr->is_young(), "should not already be young"); | |
183 assert(hr->get_next_young_region() == NULL, "cause it should!"); | |
184 | |
185 hr->set_next_young_region(_head); | |
186 _head = hr; | |
187 | |
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188 _g1h->g1_policy()->set_region_eden(hr, (int) _length); |
342 | 189 ++_length; |
190 } | |
191 | |
192 void YoungList::add_survivor_region(HeapRegion* hr) { | |
545 | 193 assert(hr->is_survivor(), "should be flagged as survivor region"); |
342 | 194 assert(hr->get_next_young_region() == NULL, "cause it should!"); |
195 | |
196 hr->set_next_young_region(_survivor_head); | |
197 if (_survivor_head == NULL) { | |
545 | 198 _survivor_tail = hr; |
342 | 199 } |
200 _survivor_head = hr; | |
201 ++_survivor_length; | |
202 } | |
203 | |
204 void YoungList::empty_list(HeapRegion* list) { | |
205 while (list != NULL) { | |
206 HeapRegion* next = list->get_next_young_region(); | |
207 list->set_next_young_region(NULL); | |
208 list->uninstall_surv_rate_group(); | |
209 list->set_not_young(); | |
210 list = next; | |
211 } | |
212 } | |
213 | |
214 void YoungList::empty_list() { | |
215 assert(check_list_well_formed(), "young list should be well formed"); | |
216 | |
217 empty_list(_head); | |
218 _head = NULL; | |
219 _length = 0; | |
220 | |
221 empty_list(_survivor_head); | |
222 _survivor_head = NULL; | |
545 | 223 _survivor_tail = NULL; |
342 | 224 _survivor_length = 0; |
225 | |
226 _last_sampled_rs_lengths = 0; | |
227 | |
228 assert(check_list_empty(false), "just making sure..."); | |
229 } | |
230 | |
231 bool YoungList::check_list_well_formed() { | |
232 bool ret = true; | |
233 | |
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234 uint length = 0; |
342 | 235 HeapRegion* curr = _head; |
236 HeapRegion* last = NULL; | |
237 while (curr != NULL) { | |
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238 if (!curr->is_young()) { |
342 | 239 gclog_or_tty->print_cr("### YOUNG REGION "PTR_FORMAT"-"PTR_FORMAT" " |
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240 "incorrectly tagged (y: %d, surv: %d)", |
342 | 241 curr->bottom(), curr->end(), |
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242 curr->is_young(), curr->is_survivor()); |
342 | 243 ret = false; |
244 } | |
245 ++length; | |
246 last = curr; | |
247 curr = curr->get_next_young_region(); | |
248 } | |
249 ret = ret && (length == _length); | |
250 | |
251 if (!ret) { | |
252 gclog_or_tty->print_cr("### YOUNG LIST seems not well formed!"); | |
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253 gclog_or_tty->print_cr("### list has %u entries, _length is %u", |
342 | 254 length, _length); |
255 } | |
256 | |
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257 return ret; |
342 | 258 } |
259 | |
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260 bool YoungList::check_list_empty(bool check_sample) { |
342 | 261 bool ret = true; |
262 | |
263 if (_length != 0) { | |
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264 gclog_or_tty->print_cr("### YOUNG LIST should have 0 length, not %u", |
342 | 265 _length); |
266 ret = false; | |
267 } | |
268 if (check_sample && _last_sampled_rs_lengths != 0) { | |
269 gclog_or_tty->print_cr("### YOUNG LIST has non-zero last sampled RS lengths"); | |
270 ret = false; | |
271 } | |
272 if (_head != NULL) { | |
273 gclog_or_tty->print_cr("### YOUNG LIST does not have a NULL head"); | |
274 ret = false; | |
275 } | |
276 if (!ret) { | |
277 gclog_or_tty->print_cr("### YOUNG LIST does not seem empty"); | |
278 } | |
279 | |
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280 return ret; |
342 | 281 } |
282 | |
283 void | |
284 YoungList::rs_length_sampling_init() { | |
285 _sampled_rs_lengths = 0; | |
286 _curr = _head; | |
287 } | |
288 | |
289 bool | |
290 YoungList::rs_length_sampling_more() { | |
291 return _curr != NULL; | |
292 } | |
293 | |
294 void | |
295 YoungList::rs_length_sampling_next() { | |
296 assert( _curr != NULL, "invariant" ); | |
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297 size_t rs_length = _curr->rem_set()->occupied(); |
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298 |
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299 _sampled_rs_lengths += rs_length; |
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300 |
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301 // The current region may not yet have been added to the |
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302 // incremental collection set (it gets added when it is |
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303 // retired as the current allocation region). |
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304 if (_curr->in_collection_set()) { |
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305 // Update the collection set policy information for this region |
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306 _g1h->g1_policy()->update_incremental_cset_info(_curr, rs_length); |
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307 } |
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308 |
342 | 309 _curr = _curr->get_next_young_region(); |
310 if (_curr == NULL) { | |
311 _last_sampled_rs_lengths = _sampled_rs_lengths; | |
312 // gclog_or_tty->print_cr("last sampled RS lengths = %d", _last_sampled_rs_lengths); | |
313 } | |
314 } | |
315 | |
316 void | |
317 YoungList::reset_auxilary_lists() { | |
318 guarantee( is_empty(), "young list should be empty" ); | |
319 assert(check_list_well_formed(), "young list should be well formed"); | |
320 | |
321 // Add survivor regions to SurvRateGroup. | |
322 _g1h->g1_policy()->note_start_adding_survivor_regions(); | |
545 | 323 _g1h->g1_policy()->finished_recalculating_age_indexes(true /* is_survivors */); |
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324 |
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325 int young_index_in_cset = 0; |
342 | 326 for (HeapRegion* curr = _survivor_head; |
327 curr != NULL; | |
328 curr = curr->get_next_young_region()) { | |
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329 _g1h->g1_policy()->set_region_survivor(curr, young_index_in_cset); |
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330 |
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331 // The region is a non-empty survivor so let's add it to |
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332 // the incremental collection set for the next evacuation |
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333 // pause. |
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334 _g1h->g1_policy()->add_region_to_incremental_cset_rhs(curr); |
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335 young_index_in_cset += 1; |
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336 } |
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337 assert((uint) young_index_in_cset == _survivor_length, "post-condition"); |
342 | 338 _g1h->g1_policy()->note_stop_adding_survivor_regions(); |
339 | |
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340 _head = _survivor_head; |
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341 _length = _survivor_length; |
342 | 342 if (_survivor_head != NULL) { |
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343 assert(_survivor_tail != NULL, "cause it shouldn't be"); |
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344 assert(_survivor_length > 0, "invariant"); |
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345 _survivor_tail->set_next_young_region(NULL); |
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346 } |
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347 |
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348 // Don't clear the survivor list handles until the start of |
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349 // the next evacuation pause - we need it in order to re-tag |
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350 // the survivor regions from this evacuation pause as 'young' |
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351 // at the start of the next. |
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352 |
545 | 353 _g1h->g1_policy()->finished_recalculating_age_indexes(false /* is_survivors */); |
342 | 354 |
355 assert(check_list_well_formed(), "young list should be well formed"); | |
356 } | |
357 | |
358 void YoungList::print() { | |
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359 HeapRegion* lists[] = {_head, _survivor_head}; |
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360 const char* names[] = {"YOUNG", "SURVIVOR"}; |
342 | 361 |
362 for (unsigned int list = 0; list < ARRAY_SIZE(lists); ++list) { | |
363 gclog_or_tty->print_cr("%s LIST CONTENTS", names[list]); | |
364 HeapRegion *curr = lists[list]; | |
365 if (curr == NULL) | |
366 gclog_or_tty->print_cr(" empty"); | |
367 while (curr != NULL) { | |
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368 gclog_or_tty->print_cr(" "HR_FORMAT", P: "PTR_FORMAT "N: "PTR_FORMAT", age: %4d", |
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369 HR_FORMAT_PARAMS(curr), |
342 | 370 curr->prev_top_at_mark_start(), |
371 curr->next_top_at_mark_start(), | |
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372 curr->age_in_surv_rate_group_cond()); |
342 | 373 curr = curr->get_next_young_region(); |
374 } | |
375 } | |
376 | |
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377 gclog_or_tty->cr(); |
342 | 378 } |
379 | |
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380 void G1CollectedHeap::push_dirty_cards_region(HeapRegion* hr) |
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381 { |
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382 // Claim the right to put the region on the dirty cards region list |
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383 // by installing a self pointer. |
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384 HeapRegion* next = hr->get_next_dirty_cards_region(); |
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385 if (next == NULL) { |
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386 HeapRegion* res = (HeapRegion*) |
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387 Atomic::cmpxchg_ptr(hr, hr->next_dirty_cards_region_addr(), |
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388 NULL); |
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389 if (res == NULL) { |
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390 HeapRegion* head; |
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391 do { |
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392 // Put the region to the dirty cards region list. |
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393 head = _dirty_cards_region_list; |
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394 next = (HeapRegion*) |
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395 Atomic::cmpxchg_ptr(hr, &_dirty_cards_region_list, head); |
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396 if (next == head) { |
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397 assert(hr->get_next_dirty_cards_region() == hr, |
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398 "hr->get_next_dirty_cards_region() != hr"); |
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399 if (next == NULL) { |
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400 // The last region in the list points to itself. |
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401 hr->set_next_dirty_cards_region(hr); |
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402 } else { |
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403 hr->set_next_dirty_cards_region(next); |
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404 } |
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405 } |
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406 } while (next != head); |
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407 } |
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408 } |
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409 } |
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410 |
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411 HeapRegion* G1CollectedHeap::pop_dirty_cards_region() |
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412 { |
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413 HeapRegion* head; |
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414 HeapRegion* hr; |
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415 do { |
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416 head = _dirty_cards_region_list; |
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417 if (head == NULL) { |
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418 return NULL; |
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419 } |
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420 HeapRegion* new_head = head->get_next_dirty_cards_region(); |
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421 if (head == new_head) { |
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422 // The last region. |
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423 new_head = NULL; |
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424 } |
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425 hr = (HeapRegion*)Atomic::cmpxchg_ptr(new_head, &_dirty_cards_region_list, |
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426 head); |
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427 } while (hr != head); |
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428 assert(hr != NULL, "invariant"); |
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429 hr->set_next_dirty_cards_region(NULL); |
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430 return hr; |
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431 } |
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432 |
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433 #ifdef ASSERT |
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434 // A region is added to the collection set as it is retired |
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435 // so an address p can point to a region which will be in the |
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436 // collection set but has not yet been retired. This method |
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437 // therefore is only accurate during a GC pause after all |
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438 // regions have been retired. It is used for debugging |
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439 // to check if an nmethod has references to objects that can |
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440 // be move during a partial collection. Though it can be |
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441 // inaccurate, it is sufficient for G1 because the conservative |
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442 // implementation of is_scavengable() for G1 will indicate that |
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443 // all nmethods must be scanned during a partial collection. |
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444 bool G1CollectedHeap::is_in_partial_collection(const void* p) { |
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445 HeapRegion* hr = heap_region_containing(p); |
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446 return hr != NULL && hr->in_collection_set(); |
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447 } |
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448 #endif |
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449 |
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450 // Returns true if the reference points to an object that |
10405 | 451 // can move in an incremental collection. |
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452 bool G1CollectedHeap::is_scavengable(const void* p) { |
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453 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
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454 G1CollectorPolicy* g1p = g1h->g1_policy(); |
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455 HeapRegion* hr = heap_region_containing(p); |
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456 if (hr == NULL) { |
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457 // null |
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458 assert(p == NULL, err_msg("Not NULL " PTR_FORMAT ,p)); |
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459 return false; |
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460 } else { |
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461 return !hr->isHumongous(); |
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462 } |
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463 } |
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464 |
342 | 465 void G1CollectedHeap::check_ct_logs_at_safepoint() { |
466 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
12343 | 467 CardTableModRefBS* ct_bs = g1_barrier_set(); |
342 | 468 |
469 // Count the dirty cards at the start. | |
470 CountNonCleanMemRegionClosure count1(this); | |
471 ct_bs->mod_card_iterate(&count1); | |
472 int orig_count = count1.n(); | |
473 | |
474 // First clear the logged cards. | |
475 ClearLoggedCardTableEntryClosure clear; | |
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476 dcqs.apply_closure_to_all_completed_buffers(&clear); |
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477 dcqs.iterate_closure_all_threads(&clear, false); |
342 | 478 clear.print_histo(); |
479 | |
480 // Now ensure that there's no dirty cards. | |
481 CountNonCleanMemRegionClosure count2(this); | |
482 ct_bs->mod_card_iterate(&count2); | |
483 if (count2.n() != 0) { | |
484 gclog_or_tty->print_cr("Card table has %d entries; %d originally", | |
485 count2.n(), orig_count); | |
486 } | |
487 guarantee(count2.n() == 0, "Card table should be clean."); | |
488 | |
489 RedirtyLoggedCardTableEntryClosure redirty; | |
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490 dcqs.apply_closure_to_all_completed_buffers(&redirty); |
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491 dcqs.iterate_closure_all_threads(&redirty, false); |
342 | 492 gclog_or_tty->print_cr("Log entries = %d, dirty cards = %d.", |
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493 clear.num_processed(), orig_count); |
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494 guarantee(redirty.num_processed() == clear.num_processed(), |
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495 err_msg("Redirtied "SIZE_FORMAT" cards, bug cleared "SIZE_FORMAT, |
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496 redirty.num_processed(), clear.num_processed())); |
342 | 497 |
498 CountNonCleanMemRegionClosure count3(this); | |
499 ct_bs->mod_card_iterate(&count3); | |
500 if (count3.n() != orig_count) { | |
501 gclog_or_tty->print_cr("Should have restored them all: orig = %d, final = %d.", | |
502 orig_count, count3.n()); | |
503 guarantee(count3.n() >= orig_count, "Should have restored them all."); | |
504 } | |
505 } | |
506 | |
507 // Private class members. | |
508 | |
509 G1CollectedHeap* G1CollectedHeap::_g1h; | |
510 | |
511 // Private methods. | |
512 | |
2152 | 513 HeapRegion* |
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514 G1CollectedHeap::new_region_try_secondary_free_list(bool is_old) { |
2152 | 515 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
516 while (!_secondary_free_list.is_empty() || free_regions_coming()) { | |
517 if (!_secondary_free_list.is_empty()) { | |
518 if (G1ConcRegionFreeingVerbose) { | |
519 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
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520 "secondary_free_list has %u entries", |
2152 | 521 _secondary_free_list.length()); |
522 } | |
523 // It looks as if there are free regions available on the | |
524 // secondary_free_list. Let's move them to the free_list and try | |
525 // again to allocate from it. | |
526 append_secondary_free_list(); | |
527 | |
528 assert(!_free_list.is_empty(), "if the secondary_free_list was not " | |
529 "empty we should have moved at least one entry to the free_list"); | |
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530 HeapRegion* res = _free_list.remove_region(is_old); |
2152 | 531 if (G1ConcRegionFreeingVerbose) { |
532 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
533 "allocated "HR_FORMAT" from secondary_free_list", | |
534 HR_FORMAT_PARAMS(res)); | |
535 } | |
536 return res; | |
537 } | |
538 | |
10405 | 539 // Wait here until we get notified either when (a) there are no |
2152 | 540 // more free regions coming or (b) some regions have been moved on |
541 // the secondary_free_list. | |
542 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
543 } | |
544 | |
545 if (G1ConcRegionFreeingVerbose) { | |
546 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
547 "could not allocate from secondary_free_list"); | |
548 } | |
549 return NULL; | |
550 } | |
551 | |
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552 HeapRegion* G1CollectedHeap::new_region(size_t word_size, bool is_old, bool do_expand) { |
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553 assert(!isHumongous(word_size) || word_size <= HeapRegion::GrainWords, |
2152 | 554 "the only time we use this to allocate a humongous region is " |
555 "when we are allocating a single humongous region"); | |
556 | |
557 HeapRegion* res; | |
558 if (G1StressConcRegionFreeing) { | |
559 if (!_secondary_free_list.is_empty()) { | |
560 if (G1ConcRegionFreeingVerbose) { | |
561 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
562 "forced to look at the secondary_free_list"); | |
563 } | |
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564 res = new_region_try_secondary_free_list(is_old); |
2152 | 565 if (res != NULL) { |
566 return res; | |
567 } | |
568 } | |
569 } | |
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570 |
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571 res = _free_list.remove_region(is_old); |
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572 |
2152 | 573 if (res == NULL) { |
574 if (G1ConcRegionFreeingVerbose) { | |
575 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
576 "res == NULL, trying the secondary_free_list"); | |
577 } | |
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578 res = new_region_try_secondary_free_list(is_old); |
2152 | 579 } |
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580 if (res == NULL && do_expand && _expand_heap_after_alloc_failure) { |
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581 // Currently, only attempts to allocate GC alloc regions set |
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582 // do_expand to true. So, we should only reach here during a |
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583 // safepoint. If this assumption changes we might have to |
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584 // reconsider the use of _expand_heap_after_alloc_failure. |
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585 assert(SafepointSynchronize::is_at_safepoint(), "invariant"); |
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586 |
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587 ergo_verbose1(ErgoHeapSizing, |
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588 "attempt heap expansion", |
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589 ergo_format_reason("region allocation request failed") |
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590 ergo_format_byte("allocation request"), |
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591 word_size * HeapWordSize); |
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592 if (expand(word_size * HeapWordSize)) { |
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593 // Given that expand() succeeded in expanding the heap, and we |
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594 // always expand the heap by an amount aligned to the heap |
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595 // region size, the free list should in theory not be empty. |
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596 // In either case remove_region() will check for NULL. |
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597 res = _free_list.remove_region(is_old); |
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598 } else { |
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599 _expand_heap_after_alloc_failure = false; |
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600 } |
342 | 601 } |
602 return res; | |
603 } | |
604 | |
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605 uint G1CollectedHeap::humongous_obj_allocate_find_first(uint num_regions, |
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606 size_t word_size) { |
2361 | 607 assert(isHumongous(word_size), "word_size should be humongous"); |
608 assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); | |
609 | |
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610 uint first = G1_NULL_HRS_INDEX; |
2152 | 611 if (num_regions == 1) { |
612 // Only one region to allocate, no need to go through the slower | |
10405 | 613 // path. The caller will attempt the expansion if this fails, so |
2152 | 614 // let's not try to expand here too. |
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615 HeapRegion* hr = new_region(word_size, true /* is_old */, false /* do_expand */); |
2152 | 616 if (hr != NULL) { |
617 first = hr->hrs_index(); | |
618 } else { | |
3766 | 619 first = G1_NULL_HRS_INDEX; |
2152 | 620 } |
621 } else { | |
622 // We can't allocate humongous regions while cleanupComplete() is | |
623 // running, since some of the regions we find to be empty might not | |
624 // yet be added to the free list and it is not straightforward to | |
625 // know which list they are on so that we can remove them. Note | |
626 // that we only need to do this if we need to allocate more than | |
627 // one region to satisfy the current humongous allocation | |
628 // request. If we are only allocating one region we use the common | |
629 // region allocation code (see above). | |
630 wait_while_free_regions_coming(); | |
2361 | 631 append_secondary_free_list_if_not_empty_with_lock(); |
2152 | 632 |
633 if (free_regions() >= num_regions) { | |
3766 | 634 first = _hrs.find_contiguous(num_regions); |
635 if (first != G1_NULL_HRS_INDEX) { | |
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636 for (uint i = first; i < first + num_regions; ++i) { |
3766 | 637 HeapRegion* hr = region_at(i); |
2152 | 638 assert(hr->is_empty(), "sanity"); |
2361 | 639 assert(is_on_master_free_list(hr), "sanity"); |
2152 | 640 hr->set_pending_removal(true); |
641 } | |
642 _free_list.remove_all_pending(num_regions); | |
643 } | |
644 } | |
645 } | |
646 return first; | |
647 } | |
648 | |
2361 | 649 HeapWord* |
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650 G1CollectedHeap::humongous_obj_allocate_initialize_regions(uint first, |
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651 uint num_regions, |
2361 | 652 size_t word_size) { |
3766 | 653 assert(first != G1_NULL_HRS_INDEX, "pre-condition"); |
2361 | 654 assert(isHumongous(word_size), "word_size should be humongous"); |
655 assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); | |
656 | |
657 // Index of last region in the series + 1. | |
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658 uint last = first + num_regions; |
2361 | 659 |
660 // We need to initialize the region(s) we just discovered. This is | |
661 // a bit tricky given that it can happen concurrently with | |
662 // refinement threads refining cards on these regions and | |
663 // potentially wanting to refine the BOT as they are scanning | |
664 // those cards (this can happen shortly after a cleanup; see CR | |
665 // 6991377). So we have to set up the region(s) carefully and in | |
666 // a specific order. | |
667 | |
668 // The word size sum of all the regions we will allocate. | |
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669 size_t word_size_sum = (size_t) num_regions * HeapRegion::GrainWords; |
2361 | 670 assert(word_size <= word_size_sum, "sanity"); |
671 | |
672 // This will be the "starts humongous" region. | |
3766 | 673 HeapRegion* first_hr = region_at(first); |
2361 | 674 // The header of the new object will be placed at the bottom of |
675 // the first region. | |
676 HeapWord* new_obj = first_hr->bottom(); | |
677 // This will be the new end of the first region in the series that | |
10405 | 678 // should also match the end of the last region in the series. |
2361 | 679 HeapWord* new_end = new_obj + word_size_sum; |
680 // This will be the new top of the first region that will reflect | |
681 // this allocation. | |
682 HeapWord* new_top = new_obj + word_size; | |
683 | |
684 // First, we need to zero the header of the space that we will be | |
685 // allocating. When we update top further down, some refinement | |
686 // threads might try to scan the region. By zeroing the header we | |
687 // ensure that any thread that will try to scan the region will | |
688 // come across the zero klass word and bail out. | |
689 // | |
690 // NOTE: It would not have been correct to have used | |
691 // CollectedHeap::fill_with_object() and make the space look like | |
692 // an int array. The thread that is doing the allocation will | |
693 // later update the object header to a potentially different array | |
694 // type and, for a very short period of time, the klass and length | |
695 // fields will be inconsistent. This could cause a refinement | |
696 // thread to calculate the object size incorrectly. | |
697 Copy::fill_to_words(new_obj, oopDesc::header_size(), 0); | |
698 | |
699 // We will set up the first region as "starts humongous". This | |
700 // will also update the BOT covering all the regions to reflect | |
701 // that there is a single object that starts at the bottom of the | |
702 // first region. | |
703 first_hr->set_startsHumongous(new_top, new_end); | |
704 | |
705 // Then, if there are any, we will set up the "continues | |
706 // humongous" regions. | |
707 HeapRegion* hr = NULL; | |
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708 for (uint i = first + 1; i < last; ++i) { |
3766 | 709 hr = region_at(i); |
2361 | 710 hr->set_continuesHumongous(first_hr); |
711 } | |
712 // If we have "continues humongous" regions (hr != NULL), then the | |
713 // end of the last one should match new_end. | |
714 assert(hr == NULL || hr->end() == new_end, "sanity"); | |
715 | |
716 // Up to this point no concurrent thread would have been able to | |
717 // do any scanning on any region in this series. All the top | |
718 // fields still point to bottom, so the intersection between | |
719 // [bottom,top] and [card_start,card_end] will be empty. Before we | |
720 // update the top fields, we'll do a storestore to make sure that | |
721 // no thread sees the update to top before the zeroing of the | |
722 // object header and the BOT initialization. | |
723 OrderAccess::storestore(); | |
724 | |
725 // Now that the BOT and the object header have been initialized, | |
726 // we can update top of the "starts humongous" region. | |
727 assert(first_hr->bottom() < new_top && new_top <= first_hr->end(), | |
728 "new_top should be in this region"); | |
729 first_hr->set_top(new_top); | |
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730 if (_hr_printer.is_active()) { |
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731 HeapWord* bottom = first_hr->bottom(); |
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732 HeapWord* end = first_hr->orig_end(); |
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733 if ((first + 1) == last) { |
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734 // the series has a single humongous region |
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735 _hr_printer.alloc(G1HRPrinter::SingleHumongous, first_hr, new_top); |
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736 } else { |
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737 // the series has more than one humongous regions |
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738 _hr_printer.alloc(G1HRPrinter::StartsHumongous, first_hr, end); |
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739 } |
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740 } |
2361 | 741 |
742 // Now, we will update the top fields of the "continues humongous" | |
743 // regions. The reason we need to do this is that, otherwise, | |
744 // these regions would look empty and this will confuse parts of | |
745 // G1. For example, the code that looks for a consecutive number | |
746 // of empty regions will consider them empty and try to | |
747 // re-allocate them. We can extend is_empty() to also include | |
748 // !continuesHumongous(), but it is easier to just update the top | |
749 // fields here. The way we set top for all regions (i.e., top == | |
750 // end for all regions but the last one, top == new_top for the | |
751 // last one) is actually used when we will free up the humongous | |
752 // region in free_humongous_region(). | |
753 hr = NULL; | |
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754 for (uint i = first + 1; i < last; ++i) { |
3766 | 755 hr = region_at(i); |
2361 | 756 if ((i + 1) == last) { |
757 // last continues humongous region | |
758 assert(hr->bottom() < new_top && new_top <= hr->end(), | |
759 "new_top should fall on this region"); | |
760 hr->set_top(new_top); | |
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761 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, new_top); |
2361 | 762 } else { |
763 // not last one | |
764 assert(new_top > hr->end(), "new_top should be above this region"); | |
765 hr->set_top(hr->end()); | |
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766 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, hr->end()); |
2361 | 767 } |
768 } | |
769 // If we have continues humongous regions (hr != NULL), then the | |
770 // end of the last one should match new_end and its top should | |
771 // match new_top. | |
772 assert(hr == NULL || | |
773 (hr->end() == new_end && hr->top() == new_top), "sanity"); | |
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774 check_bitmaps("Humongous Region Allocation", first_hr); |
2361 | 775 |
776 assert(first_hr->used() == word_size * HeapWordSize, "invariant"); | |
777 _summary_bytes_used += first_hr->used(); | |
778 _humongous_set.add(first_hr); | |
779 | |
780 return new_obj; | |
781 } | |
782 | |
342 | 783 // If could fit into free regions w/o expansion, try. |
784 // Otherwise, if can expand, do so. | |
785 // Otherwise, if using ex regions might help, try with ex given back. | |
1973 | 786 HeapWord* G1CollectedHeap::humongous_obj_allocate(size_t word_size) { |
2152 | 787 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
788 | |
789 verify_region_sets_optional(); | |
342 | 790 |
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791 size_t word_size_rounded = round_to(word_size, HeapRegion::GrainWords); |
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792 uint num_regions = (uint) (word_size_rounded / HeapRegion::GrainWords); |
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793 uint x_num = expansion_regions(); |
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794 uint fs = _hrs.free_suffix(); |
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795 uint first = humongous_obj_allocate_find_first(num_regions, word_size); |
3766 | 796 if (first == G1_NULL_HRS_INDEX) { |
2152 | 797 // The only thing we can do now is attempt expansion. |
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798 if (fs + x_num >= num_regions) { |
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799 // If the number of regions we're trying to allocate for this |
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800 // object is at most the number of regions in the free suffix, |
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801 // then the call to humongous_obj_allocate_find_first() above |
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802 // should have succeeded and we wouldn't be here. |
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803 // |
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804 // We should only be trying to expand when the free suffix is |
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805 // not sufficient for the object _and_ we have some expansion |
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806 // room available. |
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807 assert(num_regions > fs, "earlier allocation should have succeeded"); |
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808 |
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809 ergo_verbose1(ErgoHeapSizing, |
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810 "attempt heap expansion", |
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811 ergo_format_reason("humongous allocation request failed") |
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812 ergo_format_byte("allocation request"), |
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813 word_size * HeapWordSize); |
2188
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814 if (expand((num_regions - fs) * HeapRegion::GrainBytes)) { |
3766 | 815 // Even though the heap was expanded, it might not have |
816 // reached the desired size. So, we cannot assume that the | |
817 // allocation will succeed. | |
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818 first = humongous_obj_allocate_find_first(num_regions, word_size); |
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819 } |
2152 | 820 } |
821 } | |
822 | |
2361 | 823 HeapWord* result = NULL; |
3766 | 824 if (first != G1_NULL_HRS_INDEX) { |
2361 | 825 result = |
826 humongous_obj_allocate_initialize_regions(first, num_regions, word_size); | |
827 assert(result != NULL, "it should always return a valid result"); | |
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828 |
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829 // A successful humongous object allocation changes the used space |
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830 // information of the old generation so we need to recalculate the |
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831 // sizes and update the jstat counters here. |
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832 g1mm()->update_sizes(); |
2152 | 833 } |
834 | |
835 verify_region_sets_optional(); | |
2361 | 836 |
837 return result; | |
342 | 838 } |
839 | |
1973 | 840 HeapWord* G1CollectedHeap::allocate_new_tlab(size_t word_size) { |
841 assert_heap_not_locked_and_not_at_safepoint(); | |
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842 assert(!isHumongous(word_size), "we do not allow humongous TLABs"); |
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843 |
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844 unsigned int dummy_gc_count_before; |
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845 int dummy_gclocker_retry_count = 0; |
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846 return attempt_allocation(word_size, &dummy_gc_count_before, &dummy_gclocker_retry_count); |
342 | 847 } |
848 | |
849 HeapWord* | |
850 G1CollectedHeap::mem_allocate(size_t word_size, | |
1973 | 851 bool* gc_overhead_limit_was_exceeded) { |
852 assert_heap_not_locked_and_not_at_safepoint(); | |
342 | 853 |
10405 | 854 // Loop until the allocation is satisfied, or unsatisfied after GC. |
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855 for (int try_count = 1, gclocker_retry_count = 0; /* we'll return */; try_count += 1) { |
1973 | 856 unsigned int gc_count_before; |
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857 |
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858 HeapWord* result = NULL; |
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859 if (!isHumongous(word_size)) { |
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860 result = attempt_allocation(word_size, &gc_count_before, &gclocker_retry_count); |
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861 } else { |
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862 result = attempt_allocation_humongous(word_size, &gc_count_before, &gclocker_retry_count); |
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863 } |
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864 if (result != NULL) { |
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865 return result; |
342 | 866 } |
867 | |
868 // Create the garbage collection operation... | |
1973 | 869 VM_G1CollectForAllocation op(gc_count_before, word_size); |
342 | 870 // ...and get the VM thread to execute it. |
871 VMThread::execute(&op); | |
1973 | 872 |
873 if (op.prologue_succeeded() && op.pause_succeeded()) { | |
874 // If the operation was successful we'll return the result even | |
875 // if it is NULL. If the allocation attempt failed immediately | |
876 // after a Full GC, it's unlikely we'll be able to allocate now. | |
877 HeapWord* result = op.result(); | |
878 if (result != NULL && !isHumongous(word_size)) { | |
879 // Allocations that take place on VM operations do not do any | |
880 // card dirtying and we have to do it here. We only have to do | |
881 // this for non-humongous allocations, though. | |
882 dirty_young_block(result, word_size); | |
883 } | |
342 | 884 return result; |
1973 | 885 } else { |
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886 if (gclocker_retry_count > GCLockerRetryAllocationCount) { |
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887 return NULL; |
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888 } |
1973 | 889 assert(op.result() == NULL, |
890 "the result should be NULL if the VM op did not succeed"); | |
342 | 891 } |
892 | |
893 // Give a warning if we seem to be looping forever. | |
894 if ((QueuedAllocationWarningCount > 0) && | |
895 (try_count % QueuedAllocationWarningCount == 0)) { | |
1973 | 896 warning("G1CollectedHeap::mem_allocate retries %d times", try_count); |
342 | 897 } |
898 } | |
1973 | 899 |
900 ShouldNotReachHere(); | |
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901 return NULL; |
342 | 902 } |
903 | |
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904 HeapWord* G1CollectedHeap::attempt_allocation_slow(size_t word_size, |
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905 unsigned int *gc_count_before_ret, |
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906 int* gclocker_retry_count_ret) { |
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907 // Make sure you read the note in attempt_allocation_humongous(). |
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908 |
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909 assert_heap_not_locked_and_not_at_safepoint(); |
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910 assert(!isHumongous(word_size), "attempt_allocation_slow() should not " |
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911 "be called for humongous allocation requests"); |
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912 |
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913 // We should only get here after the first-level allocation attempt |
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914 // (attempt_allocation()) failed to allocate. |
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915 |
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916 // We will loop until a) we manage to successfully perform the |
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917 // allocation or b) we successfully schedule a collection which |
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918 // fails to perform the allocation. b) is the only case when we'll |
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919 // return NULL. |
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920 HeapWord* result = NULL; |
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921 for (int try_count = 1; /* we'll return */; try_count += 1) { |
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922 bool should_try_gc; |
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923 unsigned int gc_count_before; |
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924 |
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925 { |
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926 MutexLockerEx x(Heap_lock); |
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927 |
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928 result = _mutator_alloc_region.attempt_allocation_locked(word_size, |
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929 false /* bot_updates */); |
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930 if (result != NULL) { |
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931 return result; |
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932 } |
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933 |
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934 // If we reach here, attempt_allocation_locked() above failed to |
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935 // allocate a new region. So the mutator alloc region should be NULL. |
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936 assert(_mutator_alloc_region.get() == NULL, "only way to get here"); |
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|
937 |
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|
938 if (GC_locker::is_active_and_needs_gc()) { |
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939 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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|
940 // No need for an ergo verbose message here, |
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941 // can_expand_young_list() does this when it returns true. |
2433
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942 result = _mutator_alloc_region.attempt_allocation_force(word_size, |
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|
943 false /* bot_updates */); |
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|
944 if (result != NULL) { |
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|
945 return result; |
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|
946 } |
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|
947 } |
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|
948 should_try_gc = false; |
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949 } else { |
6106
1d478c993020
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950 // The GCLocker may not be active but the GCLocker initiated |
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|
951 // GC may not yet have been performed (GCLocker::needs_gc() |
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7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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|
952 // returns true). In this case we do not try this GC and |
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7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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|
953 // wait until the GCLocker initiated GC is performed, and |
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|
954 // then retry the allocation. |
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7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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|
955 if (GC_locker::needs_gc()) { |
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956 should_try_gc = false; |
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|
957 } else { |
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|
958 // Read the GC count while still holding the Heap_lock. |
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959 gc_count_before = total_collections(); |
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960 should_try_gc = true; |
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|
961 } |
2433
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|
962 } |
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|
963 } |
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|
964 |
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965 if (should_try_gc) { |
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|
966 bool succeeded; |
12113
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8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
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967 result = do_collection_pause(word_size, gc_count_before, &succeeded, |
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|
968 GCCause::_g1_inc_collection_pause); |
2433
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969 if (result != NULL) { |
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970 assert(succeeded, "only way to get back a non-NULL result"); |
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971 return result; |
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|
972 } |
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|
973 |
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974 if (succeeded) { |
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975 // If we get here we successfully scheduled a collection which |
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976 // failed to allocate. No point in trying to allocate |
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977 // further. We'll just return NULL. |
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|
978 MutexLockerEx x(Heap_lock); |
4910
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7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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979 *gc_count_before_ret = total_collections(); |
2433
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980 return NULL; |
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|
981 } |
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982 } else { |
8853
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983 if (*gclocker_retry_count_ret > GCLockerRetryAllocationCount) { |
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|
984 MutexLockerEx x(Heap_lock); |
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985 *gc_count_before_ret = total_collections(); |
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7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
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986 return NULL; |
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7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
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|
987 } |
6106
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|
988 // The GCLocker is either active or the GCLocker initiated |
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|
989 // GC has not yet been performed. Stall until it is and |
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990 // then retry the allocation. |
2433
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|
991 GC_locker::stall_until_clear(); |
8853
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992 (*gclocker_retry_count_ret) += 1; |
2433
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|
993 } |
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|
994 |
10405 | 995 // We can reach here if we were unsuccessful in scheduling a |
2433
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|
996 // collection (because another thread beat us to it) or if we were |
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997 // stalled due to the GC locker. In either can we should retry the |
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|
998 // allocation attempt in case another thread successfully |
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999 // performed a collection and reclaimed enough space. We do the |
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|
1000 // first attempt (without holding the Heap_lock) here and the |
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|
1001 // follow-on attempt will be at the start of the next loop |
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|
1002 // iteration (after taking the Heap_lock). |
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|
1003 result = _mutator_alloc_region.attempt_allocation(word_size, |
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|
1004 false /* bot_updates */); |
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
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4912
diff
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|
1005 if (result != NULL) { |
2433
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|
1006 return result; |
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|
1007 } |
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|
1008 |
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|
1009 // Give a warning if we seem to be looping forever. |
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1010 if ((QueuedAllocationWarningCount > 0) && |
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1011 (try_count % QueuedAllocationWarningCount == 0)) { |
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1012 warning("G1CollectedHeap::attempt_allocation_slow() " |
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1013 "retries %d times", try_count); |
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|
1014 } |
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|
1015 } |
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|
1016 |
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|
1017 ShouldNotReachHere(); |
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1018 return NULL; |
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|
1019 } |
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|
1020 |
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1021 HeapWord* G1CollectedHeap::attempt_allocation_humongous(size_t word_size, |
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1022 unsigned int * gc_count_before_ret, |
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1023 int* gclocker_retry_count_ret) { |
2433
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1024 // The structure of this method has a lot of similarities to |
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1025 // attempt_allocation_slow(). The reason these two were not merged |
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1026 // into a single one is that such a method would require several "if |
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1027 // allocation is not humongous do this, otherwise do that" |
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|
1028 // conditional paths which would obscure its flow. In fact, an early |
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1029 // version of this code did use a unified method which was harder to |
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1030 // follow and, as a result, it had subtle bugs that were hard to |
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1031 // track down. So keeping these two methods separate allows each to |
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1032 // be more readable. It will be good to keep these two in sync as |
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|
1033 // much as possible. |
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|
1034 |
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|
1035 assert_heap_not_locked_and_not_at_safepoint(); |
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|
1036 assert(isHumongous(word_size), "attempt_allocation_humongous() " |
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|
1037 "should only be called for humongous allocations"); |
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|
1038 |
4834
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7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
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|
1039 // Humongous objects can exhaust the heap quickly, so we should check if we |
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|
1040 // need to start a marking cycle at each humongous object allocation. We do |
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7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
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|
1041 // the check before we do the actual allocation. The reason for doing it |
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|
1042 // before the allocation is that we avoid having to keep track of the newly |
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|
1043 // allocated memory while we do a GC. |
4910
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|
1044 if (g1_policy()->need_to_start_conc_mark("concurrent humongous allocation", |
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|
1045 word_size)) { |
4834
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|
1046 collect(GCCause::_g1_humongous_allocation); |
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|
1047 } |
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|
1048 |
2433
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|
1049 // We will loop until a) we manage to successfully perform the |
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1050 // allocation or b) we successfully schedule a collection which |
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|
1051 // fails to perform the allocation. b) is the only case when we'll |
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|
1052 // return NULL. |
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|
1053 HeapWord* result = NULL; |
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|
1054 for (int try_count = 1; /* we'll return */; try_count += 1) { |
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1055 bool should_try_gc; |
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1056 unsigned int gc_count_before; |
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1057 |
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1058 { |
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1059 MutexLockerEx x(Heap_lock); |
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1060 |
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1061 // Given that humongous objects are not allocated in young |
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1062 // regions, we'll first try to do the allocation without doing a |
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1063 // collection hoping that there's enough space in the heap. |
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1064 result = humongous_obj_allocate(word_size); |
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1065 if (result != NULL) { |
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1066 return result; |
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1067 } |
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1068 |
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1069 if (GC_locker::is_active_and_needs_gc()) { |
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1070 should_try_gc = false; |
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1071 } else { |
6106
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1072 // The GCLocker may not be active but the GCLocker initiated |
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1073 // GC may not yet have been performed (GCLocker::needs_gc() |
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1074 // returns true). In this case we do not try this GC and |
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1075 // wait until the GCLocker initiated GC is performed, and |
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1076 // then retry the allocation. |
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1077 if (GC_locker::needs_gc()) { |
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1078 should_try_gc = false; |
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1079 } else { |
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1080 // Read the GC count while still holding the Heap_lock. |
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1081 gc_count_before = total_collections(); |
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1082 should_try_gc = true; |
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1083 } |
2433
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1084 } |
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1085 } |
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1086 |
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1087 if (should_try_gc) { |
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1088 // If we failed to allocate the humongous object, we should try to |
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1089 // do a collection pause (if we're allowed) in case it reclaims |
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1090 // enough space for the allocation to succeed after the pause. |
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1091 |
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1092 bool succeeded; |
12113
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1093 result = do_collection_pause(word_size, gc_count_before, &succeeded, |
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1094 GCCause::_g1_humongous_allocation); |
2433
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1095 if (result != NULL) { |
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1096 assert(succeeded, "only way to get back a non-NULL result"); |
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1097 return result; |
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1098 } |
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1099 |
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1100 if (succeeded) { |
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1101 // If we get here we successfully scheduled a collection which |
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1102 // failed to allocate. No point in trying to allocate |
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1103 // further. We'll just return NULL. |
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1104 MutexLockerEx x(Heap_lock); |
4910
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1105 *gc_count_before_ret = total_collections(); |
2433
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1106 return NULL; |
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1107 } |
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1108 } else { |
8853
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1109 if (*gclocker_retry_count_ret > GCLockerRetryAllocationCount) { |
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1110 MutexLockerEx x(Heap_lock); |
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1111 *gc_count_before_ret = total_collections(); |
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1112 return NULL; |
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1113 } |
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1114 // The GCLocker is either active or the GCLocker initiated |
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1115 // GC has not yet been performed. Stall until it is and |
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1116 // then retry the allocation. |
2433
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1117 GC_locker::stall_until_clear(); |
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1118 (*gclocker_retry_count_ret) += 1; |
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1119 } |
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1120 |
10405 | 1121 // We can reach here if we were unsuccessful in scheduling a |
2433
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1122 // collection (because another thread beat us to it) or if we were |
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1123 // stalled due to the GC locker. In either can we should retry the |
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1124 // allocation attempt in case another thread successfully |
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1125 // performed a collection and reclaimed enough space. Give a |
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1126 // warning if we seem to be looping forever. |
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1127 |
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1128 if ((QueuedAllocationWarningCount > 0) && |
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1129 (try_count % QueuedAllocationWarningCount == 0)) { |
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1130 warning("G1CollectedHeap::attempt_allocation_humongous() " |
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1131 "retries %d times", try_count); |
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1132 } |
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1133 } |
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1134 |
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1135 ShouldNotReachHere(); |
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1136 return NULL; |
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1137 } |
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1138 |
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1139 HeapWord* G1CollectedHeap::attempt_allocation_at_safepoint(size_t word_size, |
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1140 bool expect_null_mutator_alloc_region) { |
2152 | 1141 assert_at_safepoint(true /* should_be_vm_thread */); |
2433
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1142 assert(_mutator_alloc_region.get() == NULL || |
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1143 !expect_null_mutator_alloc_region, |
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1144 "the current alloc region was unexpectedly found to be non-NULL"); |
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1145 |
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1146 if (!isHumongous(word_size)) { |
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1147 return _mutator_alloc_region.attempt_allocation_locked(word_size, |
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1148 false /* bot_updates */); |
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1149 } else { |
4829
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1150 HeapWord* result = humongous_obj_allocate(word_size); |
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1151 if (result != NULL && g1_policy()->need_to_start_conc_mark("STW humongous allocation")) { |
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1152 g1_policy()->set_initiate_conc_mark_if_possible(); |
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|
1153 } |
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1154 return result; |
2433
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1155 } |
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1156 |
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1157 ShouldNotReachHere(); |
342 | 1158 } |
1159 | |
1160 class PostMCRemSetClearClosure: public HeapRegionClosure { | |
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1161 G1CollectedHeap* _g1h; |
342 | 1162 ModRefBarrierSet* _mr_bs; |
1163 public: | |
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1164 PostMCRemSetClearClosure(G1CollectedHeap* g1h, ModRefBarrierSet* mr_bs) : |
12080 | 1165 _g1h(g1h), _mr_bs(mr_bs) {} |
1166 | |
342 | 1167 bool doHeapRegion(HeapRegion* r) { |
12080 | 1168 HeapRegionRemSet* hrrs = r->rem_set(); |
1169 | |
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1170 if (r->continuesHumongous()) { |
12080 | 1171 // We'll assert that the strong code root list and RSet is empty |
1172 assert(hrrs->strong_code_roots_list_length() == 0, "sanity"); | |
1173 assert(hrrs->occupied() == 0, "RSet should be empty"); | |
342 | 1174 return false; |
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1175 } |
12080 | 1176 |
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1177 _g1h->reset_gc_time_stamps(r); |
12080 | 1178 hrrs->clear(); |
342 | 1179 // You might think here that we could clear just the cards |
1180 // corresponding to the used region. But no: if we leave a dirty card | |
1181 // in a region we might allocate into, then it would prevent that card | |
1182 // from being enqueued, and cause it to be missed. | |
1183 // Re: the performance cost: we shouldn't be doing full GC anyway! | |
1184 _mr_bs->clear(MemRegion(r->bottom(), r->end())); | |
12080 | 1185 |
342 | 1186 return false; |
1187 } | |
1188 }; | |
1189 | |
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1190 void G1CollectedHeap::clear_rsets_post_compaction() { |
12343 | 1191 PostMCRemSetClearClosure rs_clear(this, g1_barrier_set()); |
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1192 heap_region_iterate(&rs_clear); |
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1193 } |
342 | 1194 |
626
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1195 class RebuildRSOutOfRegionClosure: public HeapRegionClosure { |
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1196 G1CollectedHeap* _g1h; |
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1197 UpdateRSOopClosure _cl; |
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1198 int _worker_i; |
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1199 public: |
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1200 RebuildRSOutOfRegionClosure(G1CollectedHeap* g1, int worker_i = 0) : |
1861 | 1201 _cl(g1->g1_rem_set(), worker_i), |
626
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1202 _worker_i(worker_i), |
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1203 _g1h(g1) |
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1204 { } |
1960
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1205 |
626
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1206 bool doHeapRegion(HeapRegion* r) { |
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1207 if (!r->continuesHumongous()) { |
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1208 _cl.set_from(r); |
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1209 r->oop_iterate(&_cl); |
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1210 } |
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1211 return false; |
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1212 } |
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1213 }; |
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1214 |
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1215 class ParRebuildRSTask: public AbstractGangTask { |
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1216 G1CollectedHeap* _g1; |
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1217 public: |
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1218 ParRebuildRSTask(G1CollectedHeap* g1) |
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1219 : AbstractGangTask("ParRebuildRSTask"), |
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1220 _g1(g1) |
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1221 { } |
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1222 |
4728
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1223 void work(uint worker_id) { |
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1224 RebuildRSOutOfRegionClosure rebuild_rs(_g1, worker_id); |
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1225 _g1->heap_region_par_iterate_chunked(&rebuild_rs, worker_id, |
4095
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1226 _g1->workers()->active_workers(), |
626
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1227 HeapRegion::RebuildRSClaimValue); |
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1228 } |
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1229 }; |
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1230 |
3778
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1231 class PostCompactionPrinterClosure: public HeapRegionClosure { |
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1232 private: |
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1233 G1HRPrinter* _hr_printer; |
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1234 public: |
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1235 bool doHeapRegion(HeapRegion* hr) { |
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1236 assert(!hr->is_young(), "not expecting to find young regions"); |
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1237 // We only generate output for non-empty regions. |
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1238 if (!hr->is_empty()) { |
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1239 if (!hr->isHumongous()) { |
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1240 _hr_printer->post_compaction(hr, G1HRPrinter::Old); |
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1241 } else if (hr->startsHumongous()) { |
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1242 if (hr->region_num() == 1) { |
3778
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1243 // single humongous region |
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1244 _hr_printer->post_compaction(hr, G1HRPrinter::SingleHumongous); |
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1245 } else { |
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1246 _hr_printer->post_compaction(hr, G1HRPrinter::StartsHumongous); |
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1247 } |
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1248 } else { |
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1249 assert(hr->continuesHumongous(), "only way to get here"); |
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1250 _hr_printer->post_compaction(hr, G1HRPrinter::ContinuesHumongous); |
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1251 } |
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1252 } |
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1253 return false; |
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1254 } |
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1255 |
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1256 PostCompactionPrinterClosure(G1HRPrinter* hr_printer) |
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1257 : _hr_printer(hr_printer) { } |
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1258 }; |
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1259 |
6254
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1260 void G1CollectedHeap::print_hrs_post_compaction() { |
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1261 PostCompactionPrinterClosure cl(hr_printer()); |
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1262 heap_region_iterate(&cl); |
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1263 } |
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1264 |
1973 | 1265 bool G1CollectedHeap::do_collection(bool explicit_gc, |
1656
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1266 bool clear_all_soft_refs, |
342 | 1267 size_t word_size) { |
2152 | 1268 assert_at_safepoint(true /* should_be_vm_thread */); |
1269 | |
1359
23b1b27ac76c
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diff
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|
1270 if (GC_locker::check_active_before_gc()) { |
1973 | 1271 return false; |
1359
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1272 } |
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1273 |
10405 | 1274 STWGCTimer* gc_timer = G1MarkSweep::gc_timer(); |
13400
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|
1275 gc_timer->register_gc_start(); |
10405 | 1276 |
1277 SerialOldTracer* gc_tracer = G1MarkSweep::gc_tracer(); | |
1278 gc_tracer->report_gc_start(gc_cause(), gc_timer->gc_start()); | |
1279 | |
2125
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6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
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|
1280 SvcGCMarker sgcm(SvcGCMarker::FULL); |
342 | 1281 ResourceMark rm; |
1282 | |
4872
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|
1283 print_heap_before_gc(); |
10405 | 1284 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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|
1285 |
17866
270d7cb38f40
8038934: Remove prefix allocated_ from methods and variables in Metaspace
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|
1286 size_t metadata_prev_used = MetaspaceAux::used_bytes(); |
6725
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6964458: Reimplement class meta-data storage to use native memory
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|
1287 |
2152 | 1288 verify_region_sets_optional(); |
342 | 1289 |
1387
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|
1290 const bool do_clear_all_soft_refs = clear_all_soft_refs || |
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1291 collector_policy()->should_clear_all_soft_refs(); |
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|
1292 |
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|
1293 ClearedAllSoftRefs casr(do_clear_all_soft_refs, collector_policy()); |
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|
1294 |
342 | 1295 { |
1296 IsGCActiveMark x; | |
1297 | |
1298 // Timing | |
6030 | 1299 assert(gc_cause() != GCCause::_java_lang_system_gc || explicit_gc, "invariant"); |
6007
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1300 gclog_or_tty->date_stamp(G1Log::fine() && PrintGCDateStamps); |
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|
1301 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
6030 | 1302 |
342 | 1303 { |
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
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diff
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|
1304 GCTraceTime t(GCCauseString("Full GC", gc_cause()), G1Log::fine(), true, NULL, gc_tracer->gc_id()); |
10098
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1305 TraceCollectorStats tcs(g1mm()->full_collection_counters()); |
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1306 TraceMemoryManagerStats tms(true /* fullGC */, gc_cause()); |
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1307 |
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1308 double start = os::elapsedTime(); |
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1309 g1_policy()->record_full_collection_start(); |
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1310 |
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1311 // Note: When we have a more flexible GC logging framework that |
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1312 // allows us to add optional attributes to a GC log record we |
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1313 // could consider timing and reporting how long we wait in the |
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1314 // following two methods. |
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1315 wait_while_free_regions_coming(); |
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1316 // If we start the compaction before the CM threads finish |
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1317 // scanning the root regions we might trip them over as we'll |
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1318 // be moving objects / updating references. So let's wait until |
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1319 // they are done. By telling them to abort, they should complete |
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1320 // early. |
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|
1321 _cm->root_regions()->abort(); |
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1322 _cm->root_regions()->wait_until_scan_finished(); |
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1323 append_secondary_free_list_if_not_empty_with_lock(); |
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1324 |
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1325 gc_prologue(true); |
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1326 increment_total_collections(true /* full gc */); |
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|
1327 increment_old_marking_cycles_started(); |
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|
1328 |
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|
1329 assert(used() == recalculate_used(), "Should be equal"); |
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|
1330 |
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|
1331 verify_before_gc(); |
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|
1332 |
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
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|
1333 check_bitmaps("Full GC Start"); |
10405 | 1334 pre_full_gc_dump(gc_timer); |
10098
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1335 |
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|
1336 COMPILER2_PRESENT(DerivedPointerTable::clear()); |
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|
1337 |
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1338 // Disable discovery and empty the discovered lists |
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|
1339 // for the CM ref processor. |
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|
1340 ref_processor_cm()->disable_discovery(); |
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|
1341 ref_processor_cm()->abandon_partial_discovery(); |
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|
1342 ref_processor_cm()->verify_no_references_recorded(); |
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1343 |
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1344 // Abandon current iterations of concurrent marking and concurrent |
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1345 // refinement, if any are in progress. We have to do this before |
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1346 // wait_until_scan_finished() below. |
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|
1347 concurrent_mark()->abort(); |
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|
1348 |
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1349 // Make sure we'll choose a new allocation region afterwards. |
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1350 release_mutator_alloc_region(); |
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|
1351 abandon_gc_alloc_regions(); |
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|
1352 g1_rem_set()->cleanupHRRS(); |
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|
1353 |
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1354 // We should call this after we retire any currently active alloc |
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1355 // regions so that all the ALLOC / RETIRE events are generated |
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1356 // before the start GC event. |
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1357 _hr_printer.start_gc(true /* full */, (size_t) total_collections()); |
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1358 |
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1359 // We may have added regions to the current incremental collection |
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1360 // set between the last GC or pause and now. We need to clear the |
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1361 // incremental collection set and then start rebuilding it afresh |
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1362 // after this full GC. |
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1363 abandon_collection_set(g1_policy()->inc_cset_head()); |
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1364 g1_policy()->clear_incremental_cset(); |
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1365 g1_policy()->stop_incremental_cset_building(); |
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1366 |
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1367 tear_down_region_sets(false /* free_list_only */); |
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1368 g1_policy()->set_gcs_are_young(true); |
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1369 |
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1370 // See the comments in g1CollectedHeap.hpp and |
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1371 // G1CollectedHeap::ref_processing_init() about |
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1372 // how reference processing currently works in G1. |
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1373 |
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1374 // Temporarily make discovery by the STW ref processor single threaded (non-MT). |
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1375 ReferenceProcessorMTDiscoveryMutator stw_rp_disc_ser(ref_processor_stw(), false); |
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1376 |
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1377 // Temporarily clear the STW ref processor's _is_alive_non_header field. |
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1378 ReferenceProcessorIsAliveMutator stw_rp_is_alive_null(ref_processor_stw(), NULL); |
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|
1379 |
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1380 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, true /*verify_no_refs*/); |
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1381 ref_processor_stw()->setup_policy(do_clear_all_soft_refs); |
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|
1382 |
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|
1383 // Do collection work |
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|
1384 { |
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|
1385 HandleMark hm; // Discard invalid handles created during gc |
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1386 G1MarkSweep::invoke_at_safepoint(ref_processor_stw(), do_clear_all_soft_refs); |
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|
1387 } |
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|
1388 |
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1389 assert(free_regions() == 0, "we should not have added any free regions"); |
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1390 rebuild_region_sets(false /* free_list_only */); |
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|
1391 |
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1392 // Enqueue any discovered reference objects that have |
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1393 // not been removed from the discovered lists. |
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1394 ref_processor_stw()->enqueue_discovered_references(); |
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|
1395 |
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|
1396 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
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|
1397 |
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|
1398 MemoryService::track_memory_usage(); |
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|
1399 |
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1400 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
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1401 ref_processor_stw()->verify_no_references_recorded(); |
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1402 |
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1403 // Delete metaspaces for unloaded class loaders and clean up loader_data graph |
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|
1404 ClassLoaderDataGraph::purge(); |
12080 | 1405 MetaspaceAux::verify_metrics(); |
10098
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|
1406 |
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1407 // Note: since we've just done a full GC, concurrent |
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1408 // marking is no longer active. Therefore we need not |
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|
1409 // re-enable reference discovery for the CM ref processor. |
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1410 // That will be done at the start of the next marking cycle. |
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|
1411 assert(!ref_processor_cm()->discovery_enabled(), "Postcondition"); |
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1412 ref_processor_cm()->verify_no_references_recorded(); |
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|
1413 |
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|
1414 reset_gc_time_stamp(); |
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1415 // Since everything potentially moved, we will clear all remembered |
10405 | 1416 // sets, and clear all cards. Later we will rebuild remembered |
10098
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1417 // sets. We will also reset the GC time stamps of the regions. |
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|
1418 clear_rsets_post_compaction(); |
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|
1419 check_gc_time_stamps(); |
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|
1420 |
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|
1421 // Resize the heap if necessary. |
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|
1422 resize_if_necessary_after_full_collection(explicit_gc ? 0 : word_size); |
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|
1423 |
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|
1424 if (_hr_printer.is_active()) { |
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1425 // We should do this after we potentially resize the heap so |
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|
1426 // that all the COMMIT / UNCOMMIT events are generated before |
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|
1427 // the end GC event. |
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|
1428 |
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|
1429 print_hrs_post_compaction(); |
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|
1430 _hr_printer.end_gc(true /* full */, (size_t) total_collections()); |
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|
1431 } |
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|
1432 |
10246
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|
1433 G1HotCardCache* hot_card_cache = _cg1r->hot_card_cache(); |
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|
1434 if (hot_card_cache->use_cache()) { |
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|
1435 hot_card_cache->reset_card_counts(); |
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|
1436 hot_card_cache->reset_hot_cache(); |
10098
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|
1437 } |
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|
1438 |
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|
1439 // Rebuild remembered sets of all regions. |
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|
1440 if (G1CollectedHeap::use_parallel_gc_threads()) { |
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|
1441 uint n_workers = |
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|
1442 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
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|
1443 workers()->active_workers(), |
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|
1444 Threads::number_of_non_daemon_threads()); |
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|
1445 assert(UseDynamicNumberOfGCThreads || |
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|
1446 n_workers == workers()->total_workers(), |
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|
1447 "If not dynamic should be using all the workers"); |
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|
1448 workers()->set_active_workers(n_workers); |
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|
1449 // Set parallel threads in the heap (_n_par_threads) only |
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1450 // before a parallel phase and always reset it to 0 after |
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|
1451 // the phase so that the number of parallel threads does |
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1452 // no get carried forward to a serial phase where there |
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1453 // may be code that is "possibly_parallel". |
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|
1454 set_par_threads(n_workers); |
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|
1455 |
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|
1456 ParRebuildRSTask rebuild_rs_task(this); |
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|
1457 assert(check_heap_region_claim_values( |
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|
1458 HeapRegion::InitialClaimValue), "sanity check"); |
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|
1459 assert(UseDynamicNumberOfGCThreads || |
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|
1460 workers()->active_workers() == workers()->total_workers(), |
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|
1461 "Unless dynamic should use total workers"); |
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|
1462 // Use the most recent number of active workers |
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|
1463 assert(workers()->active_workers() > 0, |
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|
1464 "Active workers not properly set"); |
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|
1465 set_par_threads(workers()->active_workers()); |
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|
1466 workers()->run_task(&rebuild_rs_task); |
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1467 set_par_threads(0); |
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1468 assert(check_heap_region_claim_values( |
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1469 HeapRegion::RebuildRSClaimValue), "sanity check"); |
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1470 reset_heap_region_claim_values(); |
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1471 } else { |
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1472 RebuildRSOutOfRegionClosure rebuild_rs(this); |
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1473 heap_region_iterate(&rebuild_rs); |
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1474 } |
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|
1475 |
12080 | 1476 // Rebuild the strong code root lists for each region |
1477 rebuild_strong_code_roots(); | |
1478 | |
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1479 if (true) { // FIXME |
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1480 MetaspaceGC::compute_new_size(); |
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1481 } |
342 | 1482 |
546
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1483 #ifdef TRACESPINNING |
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1484 ParallelTaskTerminator::print_termination_counts(); |
546
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1485 #endif |
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1486 |
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1487 // Discard all rset updates |
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1488 JavaThread::dirty_card_queue_set().abandon_logs(); |
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1489 assert(!G1DeferredRSUpdate |
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1490 || (G1DeferredRSUpdate && |
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1491 (dirty_card_queue_set().completed_buffers_num() == 0)), "Should not be any"); |
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1492 |
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1493 _young_list->reset_sampled_info(); |
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1494 // At this point there should be no regions in the |
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1495 // entire heap tagged as young. |
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1496 assert(check_young_list_empty(true /* check_heap */), |
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1497 "young list should be empty at this point"); |
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|
1498 |
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1499 // Update the number of full collections that have been completed. |
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1500 increment_old_marking_cycles_completed(false /* concurrent */); |
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1501 |
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|
1502 _hrs.verify_optional(); |
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|
1503 verify_region_sets_optional(); |
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|
1504 |
10373
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|
1505 verify_after_gc(); |
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|
1506 |
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1507 // Clear the previous marking bitmap, if needed for bitmap verification. |
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1508 // Note we cannot do this when we clear the next marking bitmap in |
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1509 // ConcurrentMark::abort() above since VerifyDuringGC verifies the |
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1510 // objects marked during a full GC against the previous bitmap. |
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1511 // But we need to clear it before calling check_bitmaps below since |
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1512 // the full GC has compacted objects and updated TAMS but not updated |
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1513 // the prev bitmap. |
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1514 if (G1VerifyBitmaps) { |
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1515 ((CMBitMap*) concurrent_mark()->prevMarkBitMap())->clearAll(); |
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1516 } |
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1517 check_bitmaps("Full GC End"); |
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1518 |
10098
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1519 // Start a new incremental collection set for the next pause |
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1520 assert(g1_policy()->collection_set() == NULL, "must be"); |
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1521 g1_policy()->start_incremental_cset_building(); |
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1522 |
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1523 clear_cset_fast_test(); |
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|
1524 |
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1525 init_mutator_alloc_region(); |
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|
1526 |
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1527 double end = os::elapsedTime(); |
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1528 g1_policy()->record_full_collection_end(); |
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|
1529 |
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1530 if (G1Log::fine()) { |
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1531 g1_policy()->print_heap_transition(); |
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1532 } |
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|
1533 |
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1534 // We must call G1MonitoringSupport::update_sizes() in the same scoping level |
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1535 // as an active TraceMemoryManagerStats object (i.e. before the destructor for the |
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1536 // TraceMemoryManagerStats is called) so that the G1 memory pools are updated |
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1537 // before any GC notifications are raised. |
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|
1538 g1mm()->update_sizes(); |
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|
1539 |
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1540 gc_epilogue(true); |
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1541 } |
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|
1542 |
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|
1543 if (G1Log::finer()) { |
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|
1544 g1_policy()->print_detailed_heap_transition(true /* full */); |
10098
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1545 } |
6121
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|
1546 |
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|
1547 print_heap_after_gc(); |
10405 | 1548 trace_heap_after_gc(gc_tracer); |
1549 | |
1550 post_full_gc_dump(gc_timer); | |
1551 | |
13400
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|
1552 gc_timer->register_gc_end(); |
10405 | 1553 gc_tracer->report_gc_end(gc_timer->gc_end(), gc_timer->time_partitions()); |
10098
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1554 } |
1973 | 1555 |
1556 return true; | |
342 | 1557 } |
1558 | |
1559 void G1CollectedHeap::do_full_collection(bool clear_all_soft_refs) { | |
1973 | 1560 // do_collection() will return whether it succeeded in performing |
1561 // the GC. Currently, there is no facility on the | |
1562 // do_full_collection() API to notify the caller than the collection | |
1563 // did not succeed (e.g., because it was locked out by the GC | |
1564 // locker). So, right now, we'll ignore the return value. | |
1565 bool dummy = do_collection(true, /* explicit_gc */ | |
1566 clear_all_soft_refs, | |
1567 0 /* word_size */); | |
342 | 1568 } |
1569 | |
1570 // This code is mostly copied from TenuredGeneration. | |
1571 void | |
1572 G1CollectedHeap:: | |
1573 resize_if_necessary_after_full_collection(size_t word_size) { | |
1574 // Include the current allocation, if any, and bytes that will be | |
1575 // pre-allocated to support collections, as "used". | |
1576 const size_t used_after_gc = used(); | |
1577 const size_t capacity_after_gc = capacity(); | |
1578 const size_t free_after_gc = capacity_after_gc - used_after_gc; | |
1579 | |
1717
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1580 // This is enforced in arguments.cpp. |
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1581 assert(MinHeapFreeRatio <= MaxHeapFreeRatio, |
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1582 "otherwise the code below doesn't make sense"); |
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1583 |
342 | 1584 // We don't have floating point command-line arguments |
1717
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1585 const double minimum_free_percentage = (double) MinHeapFreeRatio / 100.0; |
342 | 1586 const double maximum_used_percentage = 1.0 - minimum_free_percentage; |
1717
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|
1587 const double maximum_free_percentage = (double) MaxHeapFreeRatio / 100.0; |
342 | 1588 const double minimum_used_percentage = 1.0 - maximum_free_percentage; |
1589 | |
1717
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1590 const size_t min_heap_size = collector_policy()->min_heap_byte_size(); |
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|
1591 const size_t max_heap_size = collector_policy()->max_heap_byte_size(); |
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|
1592 |
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1593 // We have to be careful here as these two calculations can overflow |
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|
1594 // 32-bit size_t's. |
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|
1595 double used_after_gc_d = (double) used_after_gc; |
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|
1596 double minimum_desired_capacity_d = used_after_gc_d / maximum_used_percentage; |
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|
1597 double maximum_desired_capacity_d = used_after_gc_d / minimum_used_percentage; |
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1598 |
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1599 // Let's make sure that they are both under the max heap size, which |
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1600 // by default will make them fit into a size_t. |
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|
1601 double desired_capacity_upper_bound = (double) max_heap_size; |
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1602 minimum_desired_capacity_d = MIN2(minimum_desired_capacity_d, |
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|
1603 desired_capacity_upper_bound); |
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|
1604 maximum_desired_capacity_d = MIN2(maximum_desired_capacity_d, |
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|
1605 desired_capacity_upper_bound); |
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1606 |
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1607 // We can now safely turn them into size_t's. |
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|
1608 size_t minimum_desired_capacity = (size_t) minimum_desired_capacity_d; |
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|
1609 size_t maximum_desired_capacity = (size_t) maximum_desired_capacity_d; |
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1610 |
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1611 // This assert only makes sense here, before we adjust them |
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|
1612 // with respect to the min and max heap size. |
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1613 assert(minimum_desired_capacity <= maximum_desired_capacity, |
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1614 err_msg("minimum_desired_capacity = "SIZE_FORMAT", " |
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1615 "maximum_desired_capacity = "SIZE_FORMAT, |
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1616 minimum_desired_capacity, maximum_desired_capacity)); |
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1617 |
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1618 // Should not be greater than the heap max size. No need to adjust |
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1619 // it with respect to the heap min size as it's a lower bound (i.e., |
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1620 // we'll try to make the capacity larger than it, not smaller). |
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1621 minimum_desired_capacity = MIN2(minimum_desired_capacity, max_heap_size); |
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1622 // Should not be less than the heap min size. No need to adjust it |
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1623 // with respect to the heap max size as it's an upper bound (i.e., |
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1624 // we'll try to make the capacity smaller than it, not greater). |
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1625 maximum_desired_capacity = MAX2(maximum_desired_capacity, min_heap_size); |
342 | 1626 |
1717
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1627 if (capacity_after_gc < minimum_desired_capacity) { |
342 | 1628 // Don't expand unless it's significant |
1629 size_t expand_bytes = minimum_desired_capacity - capacity_after_gc; | |
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1630 ergo_verbose4(ErgoHeapSizing, |
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1631 "attempt heap expansion", |
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1632 ergo_format_reason("capacity lower than " |
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1633 "min 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("min desired capacity"), |
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1637 capacity_after_gc, used_after_gc, |
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1638 minimum_desired_capacity, (double) MinHeapFreeRatio); |
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1639 expand(expand_bytes); |
342 | 1640 |
1641 // No expansion, now see if we want to shrink | |
1717
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1642 } else if (capacity_after_gc > maximum_desired_capacity) { |
342 | 1643 // Capacity too large, compute shrinking size |
1644 size_t shrink_bytes = capacity_after_gc - maximum_desired_capacity; | |
3914
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1645 ergo_verbose4(ErgoHeapSizing, |
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1646 "attempt heap shrinking", |
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1647 ergo_format_reason("capacity higher than " |
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1648 "max desired capacity after Full GC") |
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1649 ergo_format_byte("capacity") |
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1650 ergo_format_byte("occupancy") |
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1651 ergo_format_byte_perc("max desired capacity"), |
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1652 capacity_after_gc, used_after_gc, |
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1653 maximum_desired_capacity, (double) MaxHeapFreeRatio); |
342 | 1654 shrink(shrink_bytes); |
1655 } | |
1656 } | |
1657 | |
1658 | |
1659 HeapWord* | |
1973 | 1660 G1CollectedHeap::satisfy_failed_allocation(size_t word_size, |
1661 bool* succeeded) { | |
2152 | 1662 assert_at_safepoint(true /* should_be_vm_thread */); |
1973 | 1663 |
1664 *succeeded = true; | |
1665 // Let's attempt the allocation first. | |
2433
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1666 HeapWord* result = |
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1667 attempt_allocation_at_safepoint(word_size, |
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1668 false /* expect_null_mutator_alloc_region */); |
1973 | 1669 if (result != NULL) { |
1670 assert(*succeeded, "sanity"); | |
1671 return result; | |
1672 } | |
342 | 1673 |
1674 // In a G1 heap, we're supposed to keep allocation from failing by | |
1675 // incremental pauses. Therefore, at least for now, we'll favor | |
1676 // expansion over collection. (This might change in the future if we can | |
1677 // do something smarter than full collection to satisfy a failed alloc.) | |
1678 result = expand_and_allocate(word_size); | |
1679 if (result != NULL) { | |
1973 | 1680 assert(*succeeded, "sanity"); |
342 | 1681 return result; |
1682 } | |
1683 | |
1973 | 1684 // Expansion didn't work, we'll try to do a Full GC. |
1685 bool gc_succeeded = do_collection(false, /* explicit_gc */ | |
1686 false, /* clear_all_soft_refs */ | |
1687 word_size); | |
1688 if (!gc_succeeded) { | |
1689 *succeeded = false; | |
1690 return NULL; | |
1691 } | |
1692 | |
1693 // Retry the allocation | |
1694 result = attempt_allocation_at_safepoint(word_size, | |
2433
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1695 true /* expect_null_mutator_alloc_region */); |
342 | 1696 if (result != NULL) { |
1973 | 1697 assert(*succeeded, "sanity"); |
342 | 1698 return result; |
1699 } | |
1700 | |
1973 | 1701 // Then, try a Full GC that will collect all soft references. |
1702 gc_succeeded = do_collection(false, /* explicit_gc */ | |
1703 true, /* clear_all_soft_refs */ | |
1704 word_size); | |
1705 if (!gc_succeeded) { | |
1706 *succeeded = false; | |
1707 return NULL; | |
1708 } | |
1709 | |
1710 // Retry the allocation once more | |
1711 result = attempt_allocation_at_safepoint(word_size, | |
2433
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1712 true /* expect_null_mutator_alloc_region */); |
342 | 1713 if (result != NULL) { |
1973 | 1714 assert(*succeeded, "sanity"); |
342 | 1715 return result; |
1716 } | |
1717 | |
1387
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1718 assert(!collector_policy()->should_clear_all_soft_refs(), |
1973 | 1719 "Flag should have been handled and cleared prior to this point"); |
1387
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1720 |
342 | 1721 // What else? We might try synchronous finalization later. If the total |
1722 // space available is large enough for the allocation, then a more | |
1723 // complete compaction phase than we've tried so far might be | |
1724 // appropriate. | |
1973 | 1725 assert(*succeeded, "sanity"); |
342 | 1726 return NULL; |
1727 } | |
1728 | |
1729 // Attempting to expand the heap sufficiently | |
1730 // to support an allocation of the given "word_size". If | |
1731 // successful, perform the allocation and return the address of the | |
1732 // allocated block, or else "NULL". | |
1733 | |
1734 HeapWord* G1CollectedHeap::expand_and_allocate(size_t word_size) { | |
2152 | 1735 assert_at_safepoint(true /* should_be_vm_thread */); |
1736 | |
1737 verify_region_sets_optional(); | |
1973 | 1738 |
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1739 size_t expand_bytes = MAX2(word_size * HeapWordSize, MinHeapDeltaBytes); |
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1740 ergo_verbose1(ErgoHeapSizing, |
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1741 "attempt heap expansion", |
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1742 ergo_format_reason("allocation request failed") |
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1743 ergo_format_byte("allocation request"), |
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1744 word_size * HeapWordSize); |
2188
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1745 if (expand(expand_bytes)) { |
3766 | 1746 _hrs.verify_optional(); |
2188
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1747 verify_region_sets_optional(); |
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1748 return attempt_allocation_at_safepoint(word_size, |
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1749 false /* expect_null_mutator_alloc_region */); |
2188
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1750 } |
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1751 return NULL; |
342 | 1752 } |
1753 | |
3766 | 1754 void G1CollectedHeap::update_committed_space(HeapWord* old_end, |
1755 HeapWord* new_end) { | |
1756 assert(old_end != new_end, "don't call this otherwise"); | |
1757 assert((HeapWord*) _g1_storage.high() == new_end, "invariant"); | |
1758 | |
1759 // Update the committed mem region. | |
1760 _g1_committed.set_end(new_end); | |
1761 // Tell the card table about the update. | |
1762 Universe::heap()->barrier_set()->resize_covered_region(_g1_committed); | |
1763 // Tell the BOT about the update. | |
1764 _bot_shared->resize(_g1_committed.word_size()); | |
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1765 // Tell the hot card cache about the update |
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1766 _cg1r->hot_card_cache()->resize_card_counts(capacity()); |
3766 | 1767 } |
1768 | |
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1769 bool G1CollectedHeap::expand(size_t expand_bytes) { |
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1770 size_t aligned_expand_bytes = ReservedSpace::page_align_size_up(expand_bytes); |
342 | 1771 aligned_expand_bytes = align_size_up(aligned_expand_bytes, |
1772 HeapRegion::GrainBytes); | |
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1773 ergo_verbose2(ErgoHeapSizing, |
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1774 "expand the heap", |
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1775 ergo_format_byte("requested expansion amount") |
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1776 ergo_format_byte("attempted expansion amount"), |
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1777 expand_bytes, aligned_expand_bytes); |
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1778 |
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1779 if (_g1_storage.uncommitted_size() == 0) { |
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1780 ergo_verbose0(ErgoHeapSizing, |
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1781 "did not expand the heap", |
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1782 ergo_format_reason("heap already fully expanded")); |
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1783 return false; |
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1784 } |
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1785 |
3766 | 1786 // First commit the memory. |
1787 HeapWord* old_end = (HeapWord*) _g1_storage.high(); | |
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1788 bool successful = _g1_storage.expand_by(aligned_expand_bytes); |
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1789 if (successful) { |
3766 | 1790 // Then propagate this update to the necessary data structures. |
1791 HeapWord* new_end = (HeapWord*) _g1_storage.high(); | |
1792 update_committed_space(old_end, new_end); | |
1793 | |
1794 FreeRegionList expansion_list("Local Expansion List"); | |
1795 MemRegion mr = _hrs.expand_by(old_end, new_end, &expansion_list); | |
1796 assert(mr.start() == old_end, "post-condition"); | |
1797 // mr might be a smaller region than what was requested if | |
1798 // expand_by() was unable to allocate the HeapRegion instances | |
1799 assert(mr.end() <= new_end, "post-condition"); | |
1800 | |
1801 size_t actual_expand_bytes = mr.byte_size(); | |
1802 assert(actual_expand_bytes <= aligned_expand_bytes, "post-condition"); | |
1803 assert(actual_expand_bytes == expansion_list.total_capacity_bytes(), | |
1804 "post-condition"); | |
1805 if (actual_expand_bytes < aligned_expand_bytes) { | |
1806 // We could not expand _hrs to the desired size. In this case we | |
1807 // need to shrink the committed space accordingly. | |
1808 assert(mr.end() < new_end, "invariant"); | |
1809 | |
1810 size_t diff_bytes = aligned_expand_bytes - actual_expand_bytes; | |
1811 // First uncommit the memory. | |
1812 _g1_storage.shrink_by(diff_bytes); | |
1813 // Then propagate this update to the necessary data structures. | |
1814 update_committed_space(new_end, mr.end()); | |
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1815 } |
3766 | 1816 _free_list.add_as_tail(&expansion_list); |
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1817 |
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1818 if (_hr_printer.is_active()) { |
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1819 HeapWord* curr = mr.start(); |
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1820 while (curr < mr.end()) { |
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1821 HeapWord* curr_end = curr + HeapRegion::GrainWords; |
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1822 _hr_printer.commit(curr, curr_end); |
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1823 curr = curr_end; |
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1824 } |
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1825 assert(curr == mr.end(), "post-condition"); |
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1826 } |
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1827 g1_policy()->record_new_heap_size(n_regions()); |
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1828 } else { |
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1829 ergo_verbose0(ErgoHeapSizing, |
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1830 "did not expand the heap", |
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1831 ergo_format_reason("heap expansion operation failed")); |
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1832 // The expansion of the virtual storage space was unsuccessful. |
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1833 // Let's see if it was because we ran out of swap. |
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1834 if (G1ExitOnExpansionFailure && |
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1835 _g1_storage.uncommitted_size() >= aligned_expand_bytes) { |
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1836 // We had head room... |
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1837 vm_exit_out_of_memory(aligned_expand_bytes, OOM_MMAP_ERROR, "G1 heap expansion"); |
342 | 1838 } |
1839 } | |
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1840 return successful; |
342 | 1841 } |
1842 | |
3766 | 1843 void G1CollectedHeap::shrink_helper(size_t shrink_bytes) { |
342 | 1844 size_t aligned_shrink_bytes = |
1845 ReservedSpace::page_align_size_down(shrink_bytes); | |
1846 aligned_shrink_bytes = align_size_down(aligned_shrink_bytes, | |
1847 HeapRegion::GrainBytes); | |
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1848 uint num_regions_to_remove = (uint)(shrink_bytes / HeapRegion::GrainBytes); |
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1849 |
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1850 uint num_regions_removed = _hrs.shrink_by(num_regions_to_remove); |
3766 | 1851 HeapWord* old_end = (HeapWord*) _g1_storage.high(); |
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1852 size_t shrunk_bytes = num_regions_removed * HeapRegion::GrainBytes; |
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1853 |
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1854 ergo_verbose3(ErgoHeapSizing, |
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1855 "shrink the heap", |
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1856 ergo_format_byte("requested shrinking amount") |
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1857 ergo_format_byte("aligned shrinking amount") |
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1858 ergo_format_byte("attempted shrinking amount"), |
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1859 shrink_bytes, aligned_shrink_bytes, shrunk_bytes); |
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1860 if (num_regions_removed > 0) { |
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1861 _g1_storage.shrink_by(shrunk_bytes); |
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1862 HeapWord* new_end = (HeapWord*) _g1_storage.high(); |
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1863 |
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1864 if (_hr_printer.is_active()) { |
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1865 HeapWord* curr = old_end; |
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1866 while (curr > new_end) { |
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1867 HeapWord* curr_end = curr; |
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1868 curr -= HeapRegion::GrainWords; |
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1869 _hr_printer.uncommit(curr, curr_end); |
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1870 } |
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1871 } |
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1872 |
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1873 _expansion_regions += num_regions_removed; |
3766 | 1874 update_committed_space(old_end, new_end); |
1875 HeapRegionRemSet::shrink_heap(n_regions()); | |
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1876 g1_policy()->record_new_heap_size(n_regions()); |
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1877 } else { |
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1878 ergo_verbose0(ErgoHeapSizing, |
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1879 "did not shrink the heap", |
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1880 ergo_format_reason("heap shrinking operation failed")); |
342 | 1881 } |
1882 } | |
1883 | |
1884 void G1CollectedHeap::shrink(size_t shrink_bytes) { | |
2152 | 1885 verify_region_sets_optional(); |
1886 | |
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1887 // We should only reach here at the end of a Full GC which means we |
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1888 // should not not be holding to any GC alloc regions. The method |
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1889 // below will make sure of that and do any remaining clean up. |
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1890 abandon_gc_alloc_regions(); |
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1891 |
2152 | 1892 // Instead of tearing down / rebuilding the free lists here, we |
1893 // could instead use the remove_all_pending() method on free_list to | |
1894 // remove only the ones that we need to remove. | |
4072 | 1895 tear_down_region_sets(true /* free_list_only */); |
342 | 1896 shrink_helper(shrink_bytes); |
4072 | 1897 rebuild_region_sets(true /* free_list_only */); |
2152 | 1898 |
3766 | 1899 _hrs.verify_optional(); |
2152 | 1900 verify_region_sets_optional(); |
342 | 1901 } |
1902 | |
1903 // Public methods. | |
1904 | |
1905 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away | |
1906 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list | |
1907 #endif // _MSC_VER | |
1908 | |
1909 | |
1910 G1CollectedHeap::G1CollectedHeap(G1CollectorPolicy* policy_) : | |
1911 SharedHeap(policy_), | |
1912 _g1_policy(policy_), | |
1111 | 1913 _dirty_card_queue_set(false), |
1705 | 1914 _into_cset_dirty_card_queue_set(false), |
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1915 _is_alive_closure_cm(this), |
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1916 _is_alive_closure_stw(this), |
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1917 _ref_processor_cm(NULL), |
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1918 _ref_processor_stw(NULL), |
342 | 1919 _process_strong_tasks(new SubTasksDone(G1H_PS_NumElements)), |
1920 _bot_shared(NULL), | |
10405 | 1921 _evac_failure_scan_stack(NULL), |
342 | 1922 _mark_in_progress(false), |
2152 | 1923 _cg1r(NULL), _summary_bytes_used(0), |
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1924 _g1mm(NULL), |
342 | 1925 _refine_cte_cl(NULL), |
1926 _full_collection(false), | |
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1927 _free_list("Master Free List", new MasterFreeRegionListMtSafeChecker()), |
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1928 _secondary_free_list("Secondary Free List", new SecondaryFreeRegionListMtSafeChecker()), |
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1929 _old_set("Old Set", false /* humongous */, new OldRegionSetMtSafeChecker()), |
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1930 _humongous_set("Master Humongous Set", true /* humongous */, new HumongousRegionSetMtSafeChecker()), |
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1931 _humongous_is_live(), |
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1932 _has_humongous_reclaim_candidates(false), |
2152 | 1933 _free_regions_coming(false), |
342 | 1934 _young_list(new YoungList(this)), |
1935 _gc_time_stamp(0), | |
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1936 _retained_old_gc_alloc_region(NULL), |
6595 | 1937 _survivor_plab_stats(YoungPLABSize, PLABWeight), |
1938 _old_plab_stats(OldPLABSize, PLABWeight), | |
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1939 _expand_heap_after_alloc_failure(true), |
526 | 1940 _surviving_young_words(NULL), |
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1941 _old_marking_cycles_started(0), |
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1942 _old_marking_cycles_completed(0), |
10405 | 1943 _concurrent_cycle_started(false), |
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1944 _in_cset_fast_test(), |
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1945 _dirty_cards_region_list(NULL), |
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1946 _worker_cset_start_region(NULL), |
10405 | 1947 _worker_cset_start_region_time_stamp(NULL), |
1948 _gc_timer_stw(new (ResourceObj::C_HEAP, mtGC) STWGCTimer()), | |
1949 _gc_timer_cm(new (ResourceObj::C_HEAP, mtGC) ConcurrentGCTimer()), | |
1950 _gc_tracer_stw(new (ResourceObj::C_HEAP, mtGC) G1NewTracer()), | |
1951 _gc_tracer_cm(new (ResourceObj::C_HEAP, mtGC) G1OldTracer()) { | |
1952 | |
1953 _g1h = this; | |
342 | 1954 if (_process_strong_tasks == NULL || !_process_strong_tasks->valid()) { |
1955 vm_exit_during_initialization("Failed necessary allocation."); | |
1956 } | |
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1957 |
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1958 _humongous_object_threshold_in_words = HeapRegion::GrainWords / 2; |
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1959 |
342 | 1960 int n_queues = MAX2((int)ParallelGCThreads, 1); |
1961 _task_queues = new RefToScanQueueSet(n_queues); | |
1962 | |
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1963 uint n_rem_sets = HeapRegionRemSet::num_par_rem_sets(); |
342 | 1964 assert(n_rem_sets > 0, "Invariant."); |
1965 | |
6197 | 1966 _worker_cset_start_region = NEW_C_HEAP_ARRAY(HeapRegion*, n_queues, mtGC); |
1967 _worker_cset_start_region_time_stamp = NEW_C_HEAP_ARRAY(unsigned int, n_queues, mtGC); | |
10405 | 1968 _evacuation_failed_info_array = NEW_C_HEAP_ARRAY(EvacuationFailedInfo, n_queues, mtGC); |
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1969 |
342 | 1970 for (int i = 0; i < n_queues; i++) { |
1971 RefToScanQueue* q = new RefToScanQueue(); | |
1972 q->initialize(); | |
1973 _task_queues->register_queue(i, q); | |
10405 | 1974 ::new (&_evacuation_failed_info_array[i]) EvacuationFailedInfo(); |
1975 } | |
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1976 clear_cset_start_regions(); |
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1977 |
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1978 // Initialize the G1EvacuationFailureALot counters and flags. |
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1979 NOT_PRODUCT(reset_evacuation_should_fail();) |
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1980 |
342 | 1981 guarantee(_task_queues != NULL, "task_queues allocation failure."); |
1982 } | |
1983 | |
1984 jint G1CollectedHeap::initialize() { | |
1166 | 1985 CollectedHeap::pre_initialize(); |
342 | 1986 os::enable_vtime(); |
1987 | |
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1988 G1Log::init(); |
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1989 |
342 | 1990 // Necessary to satisfy locking discipline assertions. |
1991 | |
1992 MutexLocker x(Heap_lock); | |
1993 | |
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1994 // We have to initialize the printer before committing the heap, as |
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1995 // it will be used then. |
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1996 _hr_printer.set_active(G1PrintHeapRegions); |
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1997 |
342 | 1998 // While there are no constraints in the GC code that HeapWordSize |
1999 // be any particular value, there are multiple other areas in the | |
2000 // system which believe this to be true (e.g. oop->object_size in some | |
2001 // cases incorrectly returns the size in wordSize units rather than | |
2002 // HeapWordSize). | |
2003 guarantee(HeapWordSize == wordSize, "HeapWordSize must equal wordSize"); | |
2004 | |
2005 size_t init_byte_size = collector_policy()->initial_heap_byte_size(); | |
2006 size_t max_byte_size = collector_policy()->max_heap_byte_size(); | |
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2007 size_t heap_alignment = collector_policy()->heap_alignment(); |
342 | 2008 |
2009 // Ensure that the sizes are properly aligned. | |
2010 Universe::check_alignment(init_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
2011 Universe::check_alignment(max_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
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2012 Universe::check_alignment(max_byte_size, heap_alignment, "g1 heap"); |
342 | 2013 |
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2014 _refine_cte_cl = new RefineCardTableEntryClosure(); |
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2015 |
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2016 _cg1r = new ConcurrentG1Refine(this, _refine_cte_cl); |
342 | 2017 |
2018 // Reserve the maximum. | |
642
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2019 |
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2020 // When compressed oops are enabled, the preferred heap base |
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2021 // is calculated by subtracting the requested size from the |
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2022 // 32Gb boundary and using the result as the base address for |
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2023 // heap reservation. If the requested size is not aligned to |
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2024 // HeapRegion::GrainBytes (i.e. the alignment that is passed |
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2025 // into the ReservedHeapSpace constructor) then the actual |
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changeset
|
2026 // base of the reserved heap may end up differing from the |
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
3823
diff
changeset
|
2027 // address that was requested (i.e. the preferred heap base). |
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
3823
diff
changeset
|
2028 // If this happens then we could end up using a non-optimal |
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
3823
diff
changeset
|
2029 // compressed oops mode. |
6aa4feb8a366
7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking
johnc
parents:
3823
diff
changeset
|
2030 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
2031 ReservedSpace heap_rs = Universe::reserve_heap(max_byte_size, |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
stefank
parents:
12082
diff
changeset
|
2032 heap_alignment); |
342 | 2033 |
2034 // It is important to do this in a way such that concurrent readers can't | |
10405 | 2035 // temporarily think something is in the heap. (I've actually seen this |
342 | 2036 // happen in asserts: DLD.) |
2037 _reserved.set_word_size(0); | |
2038 _reserved.set_start((HeapWord*)heap_rs.base()); | |
2039 _reserved.set_end((HeapWord*)(heap_rs.base() + heap_rs.size())); | |
2040 | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2041 _expansion_regions = (uint) (max_byte_size / HeapRegion::GrainBytes); |
342 | 2042 |
2043 // Create the gen rem set (and barrier set) for the entire reserved region. | |
2044 _rem_set = collector_policy()->create_rem_set(_reserved, 2); | |
2045 set_barrier_set(rem_set()->bs()); | |
12343 | 2046 if (!barrier_set()->is_a(BarrierSet::G1SATBCTLogging)) { |
2047 vm_exit_during_initialization("G1 requires a G1SATBLoggingCardTableModRefBS"); | |
342 | 2048 return JNI_ENOMEM; |
2049 } | |
2050 | |
2051 // Also create a G1 rem set. | |
12343 | 2052 _g1_rem_set = new G1RemSet(this, g1_barrier_set()); |
342 | 2053 |
2054 // Carve out the G1 part of the heap. | |
2055 | |
2056 ReservedSpace g1_rs = heap_rs.first_part(max_byte_size); | |
2057 _g1_reserved = MemRegion((HeapWord*)g1_rs.base(), | |
2058 g1_rs.size()/HeapWordSize); | |
2059 | |
2060 _g1_storage.initialize(g1_rs, 0); | |
2061 _g1_committed = MemRegion((HeapWord*)_g1_storage.low(), (size_t) 0); | |
3766 | 2062 _hrs.initialize((HeapWord*) _g1_reserved.start(), |
12305
a19bea467577
7163191: G1: introduce a "heap spanning table" abstraction
tschatzl
parents:
12233
diff
changeset
|
2063 (HeapWord*) _g1_reserved.end()); |
a19bea467577
7163191: G1: introduce a "heap spanning table" abstraction
tschatzl
parents:
12233
diff
changeset
|
2064 assert(_hrs.max_length() == _expansion_regions, |
a19bea467577
7163191: G1: introduce a "heap spanning table" abstraction
tschatzl
parents:
12233
diff
changeset
|
2065 err_msg("max length: %u expansion regions: %u", |
a19bea467577
7163191: G1: introduce a "heap spanning table" abstraction
tschatzl
parents:
12233
diff
changeset
|
2066 _hrs.max_length(), _expansion_regions)); |
342 | 2067 |
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2068 // Do later initialization work for concurrent refinement. |
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2069 _cg1r->init(); |
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2070 |
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
changeset
|
2071 // 6843694 - ensure that the maximum region index can fit |
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
changeset
|
2072 // in the remembered set structures. |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2073 const uint max_region_idx = (1U << (sizeof(RegionIdx_t)*BitsPerByte-1)) - 1; |
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
changeset
|
2074 guarantee((max_regions() - 1) <= max_region_idx, "too many regions"); |
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
changeset
|
2075 |
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
changeset
|
2076 size_t max_cards_per_region = ((size_t)1 << (sizeof(CardIdx_t)*BitsPerByte-1)) - 1; |
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
941
diff
changeset
|
2077 guarantee(HeapRegion::CardsPerRegion > 0, "make sure it's initialized"); |
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3983
diff
changeset
|
2078 guarantee(HeapRegion::CardsPerRegion < max_cards_per_region, |
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
941
diff
changeset
|
2079 "too many cards per region"); |
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
changeset
|
2080 |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
2081 FreeRegionList::set_unrealistically_long_length(max_regions() + 1); |
2152 | 2082 |
342 | 2083 _bot_shared = new G1BlockOffsetSharedArray(_reserved, |
2084 heap_word_size(init_byte_size)); | |
2085 | |
2086 _g1h = this; | |
2087 | |
20212
d7e2d5f2846b
8027553: Change the in_cset_fast_test functionality to use the G1BiasedArray abstraction
tschatzl
parents:
20198
diff
changeset
|
2088 _in_cset_fast_test.initialize(_g1_reserved.start(), _g1_reserved.end(), HeapRegion::GrainBytes); |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
2089 _humongous_is_live.initialize(_g1_reserved.start(), _g1_reserved.end(), HeapRegion::GrainBytes); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2090 |
342 | 2091 // Create the ConcurrentMark data structure and thread. |
2092 // (Must do this late, so that "max_regions" is defined.) | |
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2093 _cm = new ConcurrentMark(this, heap_rs); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2094 if (_cm == NULL || !_cm->completed_initialization()) { |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2095 vm_shutdown_during_initialization("Could not create/initialize ConcurrentMark"); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2096 return JNI_ENOMEM; |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2097 } |
342 | 2098 _cmThread = _cm->cmThread(); |
2099 | |
2100 // Initialize the from_card cache structure of HeapRegionRemSet. | |
2101 HeapRegionRemSet::init_heap(max_regions()); | |
2102 | |
677 | 2103 // Now expand into the initial heap size. |
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2104 if (!expand(init_byte_size)) { |
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2105 vm_shutdown_during_initialization("Failed to allocate initial heap."); |
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2106 return JNI_ENOMEM; |
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2107 } |
342 | 2108 |
2109 // Perform any initialization actions delegated to the policy. | |
2110 g1_policy()->init(); | |
2111 | |
2112 JavaThread::satb_mark_queue_set().initialize(SATB_Q_CBL_mon, | |
2113 SATB_Q_FL_lock, | |
1111 | 2114 G1SATBProcessCompletedThreshold, |
342 | 2115 Shared_SATB_Q_lock); |
794 | 2116 |
20216
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
2117 JavaThread::dirty_card_queue_set().initialize(_refine_cte_cl, |
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
2118 DirtyCardQ_CBL_mon, |
794 | 2119 DirtyCardQ_FL_lock, |
1111 | 2120 concurrent_g1_refine()->yellow_zone(), |
2121 concurrent_g1_refine()->red_zone(), | |
794 | 2122 Shared_DirtyCardQ_lock); |
2123 | |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2124 if (G1DeferredRSUpdate) { |
20216
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
2125 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
tschatzl
parents:
20215
diff
changeset
|
2126 DirtyCardQ_CBL_mon, |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2127 DirtyCardQ_FL_lock, |
1111 | 2128 -1, // never trigger processing |
2129 -1, // no limit on length | |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2130 Shared_DirtyCardQ_lock, |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2131 &JavaThread::dirty_card_queue_set()); |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2132 } |
1705 | 2133 |
2134 // Initialize the card queue set used to hold cards containing | |
2135 // references into the collection set. | |
20216
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
2136 _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
tschatzl
parents:
20215
diff
changeset
|
2137 DirtyCardQ_CBL_mon, |
1705 | 2138 DirtyCardQ_FL_lock, |
2139 -1, // never trigger processing | |
2140 -1, // no limit on length | |
2141 Shared_DirtyCardQ_lock, | |
2142 &JavaThread::dirty_card_queue_set()); | |
2143 | |
342 | 2144 // In case we're keeping closure specialization stats, initialize those |
2145 // counts and that mechanism. | |
2146 SpecializationStats::clear(); | |
2147 | |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2148 // Here we allocate the dummy full region that is required by the |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2149 // G1AllocRegion class. If we don't pass an address in the reserved |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2150 // space here, lots of asserts fire. |
3766 | 2151 |
2152 HeapRegion* dummy_region = new_heap_region(0 /* index of bottom region */, | |
2153 _g1_reserved.start()); | |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2154 // We'll re-use the same region whether the alloc region will |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2155 // require BOT updates or not and, if it doesn't, then a non-young |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2156 // region will complain that it cannot support allocations without |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2157 // BOT updates. So we'll tag the dummy region as young to avoid that. |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2158 dummy_region->set_young(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2159 // Make sure it's full. |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2160 dummy_region->set_top(dummy_region->end()); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2161 G1AllocRegion::setup(this, dummy_region); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2162 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2163 init_mutator_alloc_region(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2164 |
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
2165 // Do create of the monitoring and management support so that |
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
2166 // values in the heap have been properly initialized. |
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
2167 _g1mm = new G1MonitoringSupport(this); |
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
2168 |
17764 | 2169 G1StringDedup::initialize(); |
2170 | |
342 | 2171 return JNI_OK; |
2172 } | |
2173 | |
17947
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
17937
diff
changeset
|
2174 void G1CollectedHeap::stop() { |
17992 | 2175 // Stop all concurrent threads. We do this to make sure these threads |
2176 // do not continue to execute and access resources (e.g. gclog_or_tty) | |
17947
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
17937
diff
changeset
|
2177 // that are destroyed during shutdown. |
17992 | 2178 _cg1r->stop(); |
2179 _cmThread->stop(); | |
2180 if (G1StringDedup::is_enabled()) { | |
2181 G1StringDedup::stop(); | |
2182 } | |
17947
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
17937
diff
changeset
|
2183 } |
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
17937
diff
changeset
|
2184 |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
2185 void G1CollectedHeap::clear_humongous_is_live_table() { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
2186 guarantee(G1ReclaimDeadHumongousObjectsAtYoungGC, "Should only be called if true"); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
2187 _humongous_is_live.clear(); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
2188 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
2189 |
12233
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2190 size_t G1CollectedHeap::conservative_max_heap_alignment() { |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2191 return HeapRegion::max_region_size(); |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2192 } |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2193 |
342 | 2194 void G1CollectedHeap::ref_processing_init() { |
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
2195 // Reference processing in G1 currently works as follows: |
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
2196 // |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2197 // * There are two reference processor instances. One is |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2198 // used to record and process discovered references |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2199 // during concurrent marking; the other is used to |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2200 // record and process references during STW pauses |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2201 // (both full and incremental). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2202 // * Both ref processors need to 'span' the entire heap as |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2203 // the regions in the collection set may be dotted around. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2204 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2205 // * For the concurrent marking ref processor: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2206 // * Reference discovery is enabled at initial marking. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2207 // * Reference discovery is disabled and the discovered |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2208 // references processed etc during remarking. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2209 // * Reference discovery is MT (see below). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2210 // * Reference discovery requires a barrier (see below). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2211 // * Reference processing may or may not be MT |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
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2212 // (depending on the value of ParallelRefProcEnabled |
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2213 // and ParallelGCThreads). |
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2214 // * A full GC disables reference discovery by the CM |
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2215 // ref processor and abandons any entries on it's |
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2216 // discovered lists. |
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2217 // |
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2218 // * For the STW processor: |
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2219 // * Non MT discovery is enabled at the start of a full GC. |
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2220 // * Processing and enqueueing during a full GC is non-MT. |
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2221 // * During a full GC, references are processed after marking. |
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2222 // |
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2223 // * Discovery (may or may not be MT) is enabled at the start |
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2224 // of an incremental evacuation pause. |
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2225 // * References are processed near the end of a STW evacuation pause. |
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2226 // * For both types of GC: |
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2227 // * Discovery is atomic - i.e. not concurrent. |
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2228 // * Reference discovery will not need a barrier. |
1974
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2229 |
342 | 2230 SharedHeap::ref_processing_init(); |
2231 MemRegion mr = reserved_region(); | |
3979
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2232 |
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2233 // Concurrent Mark ref processor |
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2234 _ref_processor_cm = |
2369
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2235 new ReferenceProcessor(mr, // span |
3979
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2236 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
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2237 // mt processing |
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2238 (int) ParallelGCThreads, |
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2239 // degree of mt processing |
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2240 (ParallelGCThreads > 1) || (ConcGCThreads > 1), |
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2241 // mt discovery |
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2242 (int) MAX2(ParallelGCThreads, ConcGCThreads), |
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2243 // degree of mt discovery |
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|
2244 false, |
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2245 // Reference discovery is not atomic |
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2246 &_is_alive_closure_cm); |
3979
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2247 // is alive closure |
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2248 // (for efficiency/performance) |
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|
2249 |
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2250 // STW ref processor |
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2251 _ref_processor_stw = |
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|
2252 new ReferenceProcessor(mr, // span |
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2253 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
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2254 // mt processing |
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2255 MAX2((int)ParallelGCThreads, 1), |
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|
2256 // degree of mt processing |
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|
2257 (ParallelGCThreads > 1), |
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2258 // mt discovery |
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2259 MAX2((int)ParallelGCThreads, 1), |
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2260 // degree of mt discovery |
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|
2261 true, |
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|
2262 // Reference discovery is atomic |
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2263 &_is_alive_closure_stw); |
3979
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2264 // is alive closure |
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|
2265 // (for efficiency/performance) |
342 | 2266 } |
2267 | |
2268 size_t G1CollectedHeap::capacity() const { | |
2269 return _g1_committed.byte_size(); | |
2270 } | |
2271 | |
6254
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2272 void G1CollectedHeap::reset_gc_time_stamps(HeapRegion* hr) { |
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2273 assert(!hr->continuesHumongous(), "pre-condition"); |
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2274 hr->reset_gc_time_stamp(); |
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2275 if (hr->startsHumongous()) { |
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2276 uint first_index = hr->hrs_index() + 1; |
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2277 uint last_index = hr->last_hc_index(); |
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2278 for (uint i = first_index; i < last_index; i += 1) { |
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2279 HeapRegion* chr = region_at(i); |
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2280 assert(chr->continuesHumongous(), "sanity"); |
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2281 chr->reset_gc_time_stamp(); |
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2282 } |
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2283 } |
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|
2284 } |
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|
2285 |
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|
2286 #ifndef PRODUCT |
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2287 class CheckGCTimeStampsHRClosure : public HeapRegionClosure { |
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2288 private: |
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|
2289 unsigned _gc_time_stamp; |
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|
2290 bool _failures; |
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|
2291 |
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2292 public: |
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2293 CheckGCTimeStampsHRClosure(unsigned gc_time_stamp) : |
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2294 _gc_time_stamp(gc_time_stamp), _failures(false) { } |
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2295 |
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|
2296 virtual bool doHeapRegion(HeapRegion* hr) { |
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2297 unsigned region_gc_time_stamp = hr->get_gc_time_stamp(); |
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2298 if (_gc_time_stamp != region_gc_time_stamp) { |
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|
2299 gclog_or_tty->print_cr("Region "HR_FORMAT" has GC time stamp = %d, " |
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|
2300 "expected %d", HR_FORMAT_PARAMS(hr), |
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|
2301 region_gc_time_stamp, _gc_time_stamp); |
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|
2302 _failures = true; |
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|
2303 } |
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|
2304 return false; |
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|
2305 } |
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|
2306 |
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|
2307 bool failures() { return _failures; } |
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|
2308 }; |
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|
2309 |
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|
2310 void G1CollectedHeap::check_gc_time_stamps() { |
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2311 CheckGCTimeStampsHRClosure cl(_gc_time_stamp); |
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2312 heap_region_iterate(&cl); |
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2313 guarantee(!cl.failures(), "all GC time stamps should have been reset"); |
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2314 } |
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2315 #endif // PRODUCT |
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|
2316 |
1705 | 2317 void G1CollectedHeap::iterate_dirty_card_closure(CardTableEntryClosure* cl, |
2318 DirtyCardQueue* into_cset_dcq, | |
2319 bool concurrent, | |
17844
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|
2320 uint worker_i) { |
889 | 2321 // Clean cards in the hot card cache |
10246
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|
2322 G1HotCardCache* hot_card_cache = _cg1r->hot_card_cache(); |
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|
2323 hot_card_cache->drain(worker_i, g1_rem_set(), into_cset_dcq); |
889 | 2324 |
342 | 2325 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); |
2326 int n_completed_buffers = 0; | |
1705 | 2327 while (dcqs.apply_closure_to_completed_buffer(cl, worker_i, 0, true)) { |
342 | 2328 n_completed_buffers++; |
2329 } | |
6628
bb3f6194fedb
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|
2330 g1_policy()->phase_times()->record_update_rs_processed_buffers(worker_i, n_completed_buffers); |
342 | 2331 dcqs.clear_n_completed_buffers(); |
2332 assert(!dcqs.completed_buffers_exist_dirty(), "Completed buffers exist!"); | |
2333 } | |
2334 | |
2335 | |
2336 // Computes the sum of the storage used by the various regions. | |
2337 | |
2338 size_t G1CollectedHeap::used() const { | |
862
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|
2339 assert(Heap_lock->owner() != NULL, |
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|
2340 "Should be owned on this thread's behalf."); |
342 | 2341 size_t result = _summary_bytes_used; |
845
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|
2342 // Read only once in case it is set to NULL concurrently |
2433
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|
2343 HeapRegion* hr = _mutator_alloc_region.get(); |
845
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2344 if (hr != NULL) |
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|
2345 result += hr->used(); |
342 | 2346 return result; |
2347 } | |
2348 | |
846
42d84bbbecf4
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|
2349 size_t G1CollectedHeap::used_unlocked() const { |
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|
2350 size_t result = _summary_bytes_used; |
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|
2351 return result; |
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|
2352 } |
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|
2353 |
342 | 2354 class SumUsedClosure: public HeapRegionClosure { |
2355 size_t _used; | |
2356 public: | |
2357 SumUsedClosure() : _used(0) {} | |
2358 bool doHeapRegion(HeapRegion* r) { | |
2359 if (!r->continuesHumongous()) { | |
2360 _used += r->used(); | |
2361 } | |
2362 return false; | |
2363 } | |
2364 size_t result() { return _used; } | |
2365 }; | |
2366 | |
2367 size_t G1CollectedHeap::recalculate_used() const { | |
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|
2368 double recalculate_used_start = os::elapsedTime(); |
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|
2369 |
342 | 2370 SumUsedClosure blk; |
3766 | 2371 heap_region_iterate(&blk); |
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2372 |
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changeset
|
2373 g1_policy()->phase_times()->record_evac_fail_recalc_used_time((os::elapsedTime() - recalculate_used_start) * 1000.0); |
342 | 2374 return blk.result(); |
2375 } | |
2376 | |
2377 size_t G1CollectedHeap::unsafe_max_alloc() { | |
2152 | 2378 if (free_regions() > 0) return HeapRegion::GrainBytes; |
342 | 2379 // otherwise, is there space in the current allocation region? |
2380 | |
2381 // We need to store the current allocation region in a local variable | |
2382 // here. The problem is that this method doesn't take any locks and | |
2383 // there may be other threads which overwrite the current allocation | |
2384 // region field. attempt_allocation(), for example, sets it to NULL | |
2385 // and this can happen *after* the NULL check here but before the call | |
2386 // to free(), resulting in a SIGSEGV. Note that this doesn't appear | |
2387 // to be a problem in the optimized build, since the two loads of the | |
2388 // current allocation region field are optimized away. | |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2389 HeapRegion* hr = _mutator_alloc_region.get(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2390 if (hr == NULL) { |
342 | 2391 return 0; |
2392 } | |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2393 return hr->free(); |
342 | 2394 } |
2395 | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2396 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
|
2397 switch (cause) { |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2398 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
|
2399 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
|
2400 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
|
2401 default: return false; |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2402 } |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2403 } |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2404 |
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2405 #ifndef PRODUCT |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2406 void G1CollectedHeap::allocate_dummy_regions() { |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2407 // Let's fill up most of the region |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2408 size_t word_size = HeapRegion::GrainWords - 1024; |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2409 // 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
|
2410 guarantee(isHumongous(word_size), "sanity"); |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2411 |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2412 for (uintx i = 0; i < G1DummyRegionsPerGC; ++i) { |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2413 // 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
|
2414 HeapWord* dummy_obj = humongous_obj_allocate(word_size); |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2415 if (dummy_obj != NULL) { |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2416 MemRegion mr(dummy_obj, word_size); |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2417 CollectedHeap::fill_with_object(mr); |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2418 } else { |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2419 // 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
|
2420 // again. Let's get out of the loop. |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2421 break; |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2422 } |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2423 } |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2424 } |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2425 #endif // !PRODUCT |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2426 |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2427 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
|
2428 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
|
2429 _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
|
2430 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
|
2431 _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
|
2432 |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2433 _old_marking_cycles_started++; |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2434 } |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2435 |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2436 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
|
2437 MonitorLockerEx x(FullGCCount_lock, Mutex::_no_safepoint_check_flag); |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2438 |
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2439 // 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
|
2440 // 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
|
2441 // 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
|
2442 // assert here. |
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2443 |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2444 // 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
|
2445 // 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
|
2446 // interrupt a concurrent cycle), the number of full collections |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2447 // 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
|
2448 // 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
|
2449 // behind the number of full collections started. |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2450 |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2451 // 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
|
2452 assert(concurrent || |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2453 (_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
|
2454 (_old_marking_cycles_started == _old_marking_cycles_completed + 2), |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2455 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
|
2456 "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
|
2457 _old_marking_cycles_started, _old_marking_cycles_completed)); |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2458 |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2459 // 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
|
2460 assert(!concurrent || |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2461 (_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
|
2462 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
|
2463 "_old_marking_cycles_started = %u " |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2464 "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
|
2465 _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
|
2466 |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2467 _old_marking_cycles_completed += 1; |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2468 |
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2469 // 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
|
2470 // we wake up any waiters (especially when ExplicitInvokesConcurrent |
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2471 // is set) so that if a waiter requests another System.gc() it doesn't |
10405 | 2472 // 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
|
2473 if (concurrent) { |
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2474 _cmThread->clear_in_progress(); |
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2475 } |
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2476 |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2477 // 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
|
2478 // System.gc() with (with ExplicitGCInvokesConcurrent set or not) |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2479 // 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
|
2480 // waiting in VM_G1IncCollectionPause::doit_epilogue(). |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2481 FullGCCount_lock->notify_all(); |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2482 } |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2483 |
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
2484 void G1CollectedHeap::register_concurrent_cycle_start(const Ticks& start_time) { |
10405 | 2485 _concurrent_cycle_started = true; |
2486 _gc_timer_cm->register_gc_start(start_time); | |
2487 | |
2488 _gc_tracer_cm->report_gc_start(gc_cause(), _gc_timer_cm->gc_start()); | |
2489 trace_heap_before_gc(_gc_tracer_cm); | |
2490 } | |
2491 | |
2492 void G1CollectedHeap::register_concurrent_cycle_end() { | |
2493 if (_concurrent_cycle_started) { | |
2494 if (_cm->has_aborted()) { | |
2495 _gc_tracer_cm->report_concurrent_mode_failure(); | |
2496 } | |
12179
f175e3678be2
8020692: TestGCEventMixed.java failed because of timestamp in event after end event
ehelin
parents:
12116
diff
changeset
|
2497 |
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
2498 _gc_timer_cm->register_gc_end(); |
10405 | 2499 _gc_tracer_cm->report_gc_end(_gc_timer_cm->gc_end(), _gc_timer_cm->time_partitions()); |
2500 | |
2501 _concurrent_cycle_started = false; | |
2502 } | |
2503 } | |
2504 | |
2505 void G1CollectedHeap::trace_heap_after_concurrent_cycle() { | |
2506 if (_concurrent_cycle_started) { | |
2507 trace_heap_after_gc(_gc_tracer_cm); | |
2508 } | |
2509 } | |
2510 | |
2511 G1YCType G1CollectedHeap::yc_type() { | |
2512 bool is_young = g1_policy()->gcs_are_young(); | |
2513 bool is_initial_mark = g1_policy()->during_initial_mark_pause(); | |
2514 bool is_during_mark = mark_in_progress(); | |
2515 | |
2516 if (is_initial_mark) { | |
2517 return InitialMark; | |
2518 } else if (is_during_mark) { | |
2519 return DuringMark; | |
2520 } else if (is_young) { | |
2521 return Normal; | |
2522 } else { | |
2523 return Mixed; | |
2524 } | |
2525 } | |
2526 | |
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2527 void G1CollectedHeap::collect(GCCause::Cause cause) { |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2528 assert_heap_not_locked(); |
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2529 |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2530 unsigned int gc_count_before; |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2531 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
|
2532 bool retry_gc; |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2533 |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2534 do { |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2535 retry_gc = false; |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2536 |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2537 { |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2538 MutexLocker ml(Heap_lock); |
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2539 |
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2540 // Read the GC count while holding the Heap_lock |
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2541 gc_count_before = total_collections(); |
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2542 old_marking_count_before = _old_marking_cycles_started; |
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2543 } |
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2544 |
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2545 if (should_do_concurrent_full_gc(cause)) { |
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2546 // Schedule an initial-mark evacuation pause that will start a |
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2547 // concurrent cycle. We're setting word_size to 0 which means that |
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2548 // we are not requesting a post-GC allocation. |
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2549 VM_G1IncCollectionPause op(gc_count_before, |
1973 | 2550 0, /* word_size */ |
4910
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2551 true, /* should_initiate_conc_mark */ |
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2552 g1_policy()->max_pause_time_ms(), |
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2553 cause); |
5963
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2554 |
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2555 VMThread::execute(&op); |
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2556 if (!op.pause_succeeded()) { |
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2557 if (old_marking_count_before == _old_marking_cycles_started) { |
5963
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2558 retry_gc = op.should_retry_gc(); |
4910
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2559 } else { |
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2560 // A Full GC happened while we were trying to schedule the |
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2561 // initial-mark GC. No point in starting a new cycle given |
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2562 // that the whole heap was collected anyway. |
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2563 } |
5963
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2564 |
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2565 if (retry_gc) { |
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2566 if (GC_locker::is_active_and_needs_gc()) { |
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2567 GC_locker::stall_until_clear(); |
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2568 } |
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2569 } |
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2570 } |
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2571 } else { |
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2572 if (cause == GCCause::_gc_locker |
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2573 DEBUG_ONLY(|| cause == GCCause::_scavenge_alot)) { |
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2574 |
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2575 // Schedule a standard evacuation pause. We're setting word_size |
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2576 // to 0 which means that we are not requesting a post-GC allocation. |
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2577 VM_G1IncCollectionPause op(gc_count_before, |
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2578 0, /* word_size */ |
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2579 false, /* should_initiate_conc_mark */ |
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2580 g1_policy()->max_pause_time_ms(), |
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2581 cause); |
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|
2582 VMThread::execute(&op); |
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|
2583 } else { |
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2584 // Schedule a Full GC. |
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2585 VM_G1CollectFull op(gc_count_before, old_marking_count_before, cause); |
4910
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2586 VMThread::execute(&op); |
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2587 } |
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2588 } |
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|
2589 } while (retry_gc); |
342 | 2590 } |
2591 | |
2592 bool G1CollectedHeap::is_in(const void* p) const { | |
4708 | 2593 if (_g1_committed.contains(p)) { |
2594 // Given that we know that p is in the committed space, | |
2595 // heap_region_containing_raw() should successfully | |
2596 // return the containing region. | |
2597 HeapRegion* hr = heap_region_containing_raw(p); | |
342 | 2598 return hr->is_in(p); |
2599 } else { | |
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2600 return false; |
342 | 2601 } |
2602 } | |
2603 | |
2604 // Iteration functions. | |
2605 | |
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2606 // Applies an ExtendedOopClosure onto all references of objects within a HeapRegion. |
342 | 2607 |
2608 class IterateOopClosureRegionClosure: public HeapRegionClosure { | |
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2609 ExtendedOopClosure* _cl; |
342 | 2610 public: |
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2611 IterateOopClosureRegionClosure(ExtendedOopClosure* cl) : _cl(cl) {} |
342 | 2612 bool doHeapRegion(HeapRegion* r) { |
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2613 if (!r->continuesHumongous()) { |
342 | 2614 r->oop_iterate(_cl); |
2615 } | |
2616 return false; | |
2617 } | |
2618 }; | |
2619 | |
6725
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2620 void G1CollectedHeap::oop_iterate(ExtendedOopClosure* cl) { |
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2621 IterateOopClosureRegionClosure blk(cl); |
3766 | 2622 heap_region_iterate(&blk); |
342 | 2623 } |
2624 | |
2625 // Iterates an ObjectClosure over all objects within a HeapRegion. | |
2626 | |
2627 class IterateObjectClosureRegionClosure: public HeapRegionClosure { | |
2628 ObjectClosure* _cl; | |
2629 public: | |
2630 IterateObjectClosureRegionClosure(ObjectClosure* cl) : _cl(cl) {} | |
2631 bool doHeapRegion(HeapRegion* r) { | |
2632 if (! r->continuesHumongous()) { | |
2633 r->object_iterate(_cl); | |
2634 } | |
2635 return false; | |
2636 } | |
2637 }; | |
2638 | |
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2639 void G1CollectedHeap::object_iterate(ObjectClosure* cl) { |
342 | 2640 IterateObjectClosureRegionClosure blk(cl); |
3766 | 2641 heap_region_iterate(&blk); |
342 | 2642 } |
2643 | |
2644 // Calls a SpaceClosure on a HeapRegion. | |
2645 | |
2646 class SpaceClosureRegionClosure: public HeapRegionClosure { | |
2647 SpaceClosure* _cl; | |
2648 public: | |
2649 SpaceClosureRegionClosure(SpaceClosure* cl) : _cl(cl) {} | |
2650 bool doHeapRegion(HeapRegion* r) { | |
2651 _cl->do_space(r); | |
2652 return false; | |
2653 } | |
2654 }; | |
2655 | |
2656 void G1CollectedHeap::space_iterate(SpaceClosure* cl) { | |
2657 SpaceClosureRegionClosure blk(cl); | |
3766 | 2658 heap_region_iterate(&blk); |
342 | 2659 } |
2660 | |
3766 | 2661 void G1CollectedHeap::heap_region_iterate(HeapRegionClosure* cl) const { |
2662 _hrs.iterate(cl); | |
342 | 2663 } |
2664 | |
2665 void | |
2666 G1CollectedHeap::heap_region_par_iterate_chunked(HeapRegionClosure* cl, | |
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2667 uint worker_id, |
4728
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2668 uint no_of_par_workers, |
342 | 2669 jint claim_value) { |
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2670 const uint regions = n_regions(); |
4728
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|
2671 const uint max_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
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|
2672 no_of_par_workers : |
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|
2673 1); |
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|
2674 assert(UseDynamicNumberOfGCThreads || |
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|
2675 no_of_par_workers == workers()->total_workers(), |
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|
2676 "Non dynamic should use fixed number of workers"); |
355 | 2677 // try to spread out the starting points of the workers |
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2678 const HeapRegion* start_hr = |
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2679 start_region_for_worker(worker_id, no_of_par_workers); |
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2680 const uint start_index = start_hr->hrs_index(); |
355 | 2681 |
2682 // each worker will actually look at all regions | |
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2683 for (uint count = 0; count < regions; ++count) { |
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|
2684 const uint index = (start_index + count) % regions; |
355 | 2685 assert(0 <= index && index < regions, "sanity"); |
2686 HeapRegion* r = region_at(index); | |
2687 // we'll ignore "continues humongous" regions (we'll process them | |
2688 // when we come across their corresponding "start humongous" | |
2689 // region) and regions already claimed | |
2690 if (r->claim_value() == claim_value || r->continuesHumongous()) { | |
2691 continue; | |
2692 } | |
2693 // OK, try to claim it | |
342 | 2694 if (r->claimHeapRegion(claim_value)) { |
355 | 2695 // success! |
2696 assert(!r->continuesHumongous(), "sanity"); | |
2697 if (r->startsHumongous()) { | |
2698 // If the region is "starts humongous" we'll iterate over its | |
2699 // "continues humongous" first; in fact we'll do them | |
2700 // first. The order is important. In on case, calling the | |
2701 // closure on the "starts humongous" region might de-allocate | |
2702 // and clear all its "continues humongous" regions and, as a | |
2703 // result, we might end up processing them twice. So, we'll do | |
2704 // them first (notice: most closures will ignore them anyway) and | |
2705 // then we'll do the "starts humongous" region. | |
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2706 for (uint ch_index = index + 1; ch_index < regions; ++ch_index) { |
355 | 2707 HeapRegion* chr = region_at(ch_index); |
2708 | |
2709 // if the region has already been claimed or it's not | |
2710 // "continues humongous" we're done | |
2711 if (chr->claim_value() == claim_value || | |
2712 !chr->continuesHumongous()) { | |
2713 break; | |
2714 } | |
2715 | |
10405 | 2716 // No one should have claimed it directly. We can given |
355 | 2717 // that we claimed its "starts humongous" region. |
2718 assert(chr->claim_value() != claim_value, "sanity"); | |
2719 assert(chr->humongous_start_region() == r, "sanity"); | |
2720 | |
2721 if (chr->claimHeapRegion(claim_value)) { | |
10405 | 2722 // we should always be able to claim it; no one else should |
355 | 2723 // be trying to claim this region |
2724 | |
2725 bool res2 = cl->doHeapRegion(chr); | |
2726 assert(!res2, "Should not abort"); | |
2727 | |
2728 // Right now, this holds (i.e., no closure that actually | |
2729 // does something with "continues humongous" regions | |
2730 // clears them). We might have to weaken it in the future, | |
2731 // but let's leave these two asserts here for extra safety. | |
2732 assert(chr->continuesHumongous(), "should still be the case"); | |
2733 assert(chr->humongous_start_region() == r, "sanity"); | |
2734 } else { | |
2735 guarantee(false, "we should not reach here"); | |
2736 } | |
2737 } | |
2738 } | |
2739 | |
2740 assert(!r->continuesHumongous(), "sanity"); | |
2741 bool res = cl->doHeapRegion(r); | |
2742 assert(!res, "Should not abort"); | |
2743 } | |
2744 } | |
2745 } | |
2746 | |
390 | 2747 class ResetClaimValuesClosure: public HeapRegionClosure { |
2748 public: | |
2749 bool doHeapRegion(HeapRegion* r) { | |
2750 r->set_claim_value(HeapRegion::InitialClaimValue); | |
2751 return false; | |
2752 } | |
2753 }; | |
2754 | |
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2755 void G1CollectedHeap::reset_heap_region_claim_values() { |
390 | 2756 ResetClaimValuesClosure blk; |
2757 heap_region_iterate(&blk); | |
2758 } | |
2759 | |
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2760 void G1CollectedHeap::reset_cset_heap_region_claim_values() { |
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|
2761 ResetClaimValuesClosure blk; |
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|
2762 collection_set_iterate(&blk); |
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|
2763 } |
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2764 |
355 | 2765 #ifdef ASSERT |
2766 // This checks whether all regions in the heap have the correct claim | |
2767 // value. I also piggy-backed on this a check to ensure that the | |
2768 // humongous_start_region() information on "continues humongous" | |
2769 // regions is correct. | |
2770 | |
2771 class CheckClaimValuesClosure : public HeapRegionClosure { | |
2772 private: | |
2773 jint _claim_value; | |
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2774 uint _failures; |
355 | 2775 HeapRegion* _sh_region; |
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2776 |
355 | 2777 public: |
2778 CheckClaimValuesClosure(jint claim_value) : | |
2779 _claim_value(claim_value), _failures(0), _sh_region(NULL) { } | |
2780 bool doHeapRegion(HeapRegion* r) { | |
2781 if (r->claim_value() != _claim_value) { | |
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2782 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
355 | 2783 "claim value = %d, should be %d", |
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2784 HR_FORMAT_PARAMS(r), |
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|
2785 r->claim_value(), _claim_value); |
355 | 2786 ++_failures; |
2787 } | |
2788 if (!r->isHumongous()) { | |
2789 _sh_region = NULL; | |
2790 } else if (r->startsHumongous()) { | |
2791 _sh_region = r; | |
2792 } else if (r->continuesHumongous()) { | |
2793 if (r->humongous_start_region() != _sh_region) { | |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2794 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
355 | 2795 "HS = "PTR_FORMAT", should be "PTR_FORMAT, |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
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parents:
4095
diff
changeset
|
2796 HR_FORMAT_PARAMS(r), |
355 | 2797 r->humongous_start_region(), |
2798 _sh_region); | |
2799 ++_failures; | |
342 | 2800 } |
2801 } | |
355 | 2802 return false; |
2803 } | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2804 uint failures() { return _failures; } |
355 | 2805 }; |
2806 | |
2807 bool G1CollectedHeap::check_heap_region_claim_values(jint claim_value) { | |
2808 CheckClaimValuesClosure cl(claim_value); | |
2809 heap_region_iterate(&cl); | |
2810 return cl.failures() == 0; | |
2811 } | |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2812 |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2813 class CheckClaimValuesInCSetHRClosure: public HeapRegionClosure { |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2814 private: |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2815 jint _claim_value; |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
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diff
changeset
|
2816 uint _failures; |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2817 |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2818 public: |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2819 CheckClaimValuesInCSetHRClosure(jint claim_value) : |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2820 _claim_value(claim_value), _failures(0) { } |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2821 |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2822 uint failures() { return _failures; } |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2823 |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2824 bool doHeapRegion(HeapRegion* hr) { |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2825 assert(hr->in_collection_set(), "how?"); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2826 assert(!hr->isHumongous(), "H-region in CSet"); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2827 if (hr->claim_value() != _claim_value) { |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2828 gclog_or_tty->print_cr("CSet Region " HR_FORMAT ", " |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2829 "claim value = %d, should be %d", |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2830 HR_FORMAT_PARAMS(hr), |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2831 hr->claim_value(), _claim_value); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2832 _failures += 1; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2833 } |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2834 return false; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2835 } |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2836 }; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2837 |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2838 bool G1CollectedHeap::check_cset_heap_region_claim_values(jint claim_value) { |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2839 CheckClaimValuesInCSetHRClosure cl(claim_value); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2840 collection_set_iterate(&cl); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2841 return cl.failures() == 0; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2842 } |
355 | 2843 #endif // ASSERT |
342 | 2844 |
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2845 // Clear the cached CSet starting regions and (more importantly) |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2846 // the time stamps. Called when we reset the GC time stamp. |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2847 void G1CollectedHeap::clear_cset_start_regions() { |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2848 assert(_worker_cset_start_region != NULL, "sanity"); |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2849 assert(_worker_cset_start_region_time_stamp != NULL, "sanity"); |
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 int n_queues = MAX2((int)ParallelGCThreads, 1); |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2852 for (int i = 0; i < n_queues; i++) { |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2853 _worker_cset_start_region[i] = NULL; |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2854 _worker_cset_start_region_time_stamp[i] = 0; |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2855 } |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2856 } |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2857 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2858 // Given the id of a worker, obtain or calculate a suitable |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2859 // starting region for iterating over the current collection set. |
17844
8847586c9037
8016302: Change type of the number of GC workers to unsigned int (2)
vkempik
parents:
17833
diff
changeset
|
2860 HeapRegion* G1CollectedHeap::start_cset_region_for_worker(uint worker_i) { |
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2861 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
|
2862 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2863 HeapRegion* result = NULL; |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2864 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
|
2865 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2866 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
|
2867 // 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
|
2868 // 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
|
2869 // 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
|
2870 // (when the collection set is empty). |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2871 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
|
2872 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
|
2873 return result; |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2874 } |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2875 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2876 // 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
|
2877 // 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
|
2878 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2879 // 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
|
2880 // 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
|
2881 // avoid contention. |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2882 // If we have: |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2883 // n collection set regions |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2884 // p threads |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2885 // 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
|
2886 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2887 result = g1_policy()->collection_set(); |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2888 if (G1CollectedHeap::use_parallel_gc_threads()) { |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2889 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
|
2890 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
|
2891 assert(UseDynamicNumberOfGCThreads || |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2892 active_workers == workers()->total_workers(), |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2893 "Unless dynamic should use total workers"); |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2894 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2895 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
|
2896 uint start_ind = 0; |
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2897 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2898 if (worker_i > 0 && |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2899 _worker_cset_start_region_time_stamp[worker_i - 1] == gc_time_stamp) { |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2900 // Previous workers starting region is valid |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2901 // so let's iterate from there |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2902 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
|
2903 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
|
2904 } |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2905 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2906 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
|
2907 result = result->next_in_collection_set(); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2908 } |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2909 } |
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2910 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2911 // 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
|
2912 // (when the collection set is empty). |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2913 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
|
2914 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
|
2915 "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
|
2916 _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
|
2917 OrderAccess::storestore(); |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2918 _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
|
2919 return result; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2920 } |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2921 |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2922 HeapRegion* G1CollectedHeap::start_region_for_worker(uint worker_i, |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2923 uint no_of_par_workers) { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2924 uint worker_num = |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2925 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
|
2926 assert(UseDynamicNumberOfGCThreads || |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
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2927 no_of_par_workers == workers()->total_workers(), |
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2928 "Non dynamic should use fixed number of workers"); |
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2929 const uint start_index = n_regions() * worker_i / worker_num; |
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2930 return region_at(start_index); |
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2931 } |
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2932 |
342 | 2933 void G1CollectedHeap::collection_set_iterate(HeapRegionClosure* cl) { |
2934 HeapRegion* r = g1_policy()->collection_set(); | |
2935 while (r != NULL) { | |
2936 HeapRegion* next = r->next_in_collection_set(); | |
2937 if (cl->doHeapRegion(r)) { | |
2938 cl->incomplete(); | |
2939 return; | |
2940 } | |
2941 r = next; | |
2942 } | |
2943 } | |
2944 | |
2945 void G1CollectedHeap::collection_set_iterate_from(HeapRegion* r, | |
2946 HeapRegionClosure *cl) { | |
1656
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|
2947 if (r == NULL) { |
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2948 // The CSet is empty so there's nothing to do. |
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|
2949 return; |
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|
2950 } |
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2951 |
342 | 2952 assert(r->in_collection_set(), |
2953 "Start region must be a member of the collection set."); | |
2954 HeapRegion* cur = r; | |
2955 while (cur != NULL) { | |
2956 HeapRegion* next = cur->next_in_collection_set(); | |
2957 if (cl->doHeapRegion(cur) && false) { | |
2958 cl->incomplete(); | |
2959 return; | |
2960 } | |
2961 cur = next; | |
2962 } | |
2963 cur = g1_policy()->collection_set(); | |
2964 while (cur != r) { | |
2965 HeapRegion* next = cur->next_in_collection_set(); | |
2966 if (cl->doHeapRegion(cur) && false) { | |
2967 cl->incomplete(); | |
2968 return; | |
2969 } | |
2970 cur = next; | |
2971 } | |
2972 } | |
2973 | |
20304
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2974 HeapRegion* G1CollectedHeap::next_compaction_region(const HeapRegion* from) const { |
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2975 // We're not using an iterator given that it will wrap around when |
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2976 // it reaches the last region and this is not what we want here. |
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2977 for (uint index = from->hrs_index() + 1; index < n_regions(); index++) { |
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2978 HeapRegion* hr = region_at(index); |
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2979 if (!hr->isHumongous()) { |
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2980 return hr; |
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2981 } |
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|
2982 } |
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2983 return NULL; |
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2984 } |
342 | 2985 |
2986 Space* G1CollectedHeap::space_containing(const void* addr) const { | |
2987 Space* res = heap_region_containing(addr); | |
2988 return res; | |
2989 } | |
2990 | |
2991 HeapWord* G1CollectedHeap::block_start(const void* addr) const { | |
2992 Space* sp = space_containing(addr); | |
2993 if (sp != NULL) { | |
2994 return sp->block_start(addr); | |
2995 } | |
2996 return NULL; | |
2997 } | |
2998 | |
2999 size_t G1CollectedHeap::block_size(const HeapWord* addr) const { | |
3000 Space* sp = space_containing(addr); | |
3001 assert(sp != NULL, "block_size of address outside of heap"); | |
3002 return sp->block_size(addr); | |
3003 } | |
3004 | |
3005 bool G1CollectedHeap::block_is_obj(const HeapWord* addr) const { | |
3006 Space* sp = space_containing(addr); | |
3007 return sp->block_is_obj(addr); | |
3008 } | |
3009 | |
3010 bool G1CollectedHeap::supports_tlab_allocation() const { | |
3011 return true; | |
3012 } | |
3013 | |
3014 size_t G1CollectedHeap::tlab_capacity(Thread* ignored) const { | |
17727 | 3015 return (_g1_policy->young_list_target_length() - young_list()->survivor_length()) * HeapRegion::GrainBytes; |
3016 } | |
3017 | |
3018 size_t G1CollectedHeap::tlab_used(Thread* ignored) const { | |
3019 return young_list()->eden_used_bytes(); | |
3020 } | |
3021 | |
3022 // For G1 TLABs should not contain humongous objects, so the maximum TLAB size | |
3023 // must be smaller than the humongous object limit. | |
3024 size_t G1CollectedHeap::max_tlab_size() const { | |
3025 return align_size_down(_humongous_object_threshold_in_words - 1, MinObjAlignment); | |
342 | 3026 } |
3027 | |
3028 size_t G1CollectedHeap::unsafe_max_tlab_alloc(Thread* ignored) const { | |
3029 // Return the remaining space in the cur alloc region, but not less than | |
3030 // the min TLAB size. | |
1313
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3031 |
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3032 // Also, this value can be at most the humongous object threshold, |
10405 | 3033 // since we can't allow tlabs to grow big enough to accommodate |
1313
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3034 // humongous objects. |
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3035 |
2433
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|
3036 HeapRegion* hr = _mutator_alloc_region.get(); |
17727 | 3037 size_t max_tlab = max_tlab_size() * wordSize; |
2433
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3038 if (hr == NULL) { |
17727 | 3039 return max_tlab; |
342 | 3040 } else { |
17727 | 3041 return MIN2(MAX2(hr->free(), (size_t) MinTLABSize), max_tlab); |
342 | 3042 } |
3043 } | |
3044 | |
3045 size_t G1CollectedHeap::max_capacity() const { | |
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
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|
3046 return _g1_reserved.byte_size(); |
342 | 3047 } |
3048 | |
3049 jlong G1CollectedHeap::millis_since_last_gc() { | |
3050 // assert(false, "NYI"); | |
3051 return 0; | |
3052 } | |
3053 | |
3054 void G1CollectedHeap::prepare_for_verify() { | |
3055 if (SafepointSynchronize::is_at_safepoint() || ! UseTLAB) { | |
3056 ensure_parsability(false); | |
3057 } | |
3058 g1_rem_set()->prepare_for_verify(); | |
3059 } | |
3060 | |
6254
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3061 bool G1CollectedHeap::allocated_since_marking(oop obj, HeapRegion* hr, |
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3062 VerifyOption vo) { |
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3063 switch (vo) { |
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|
3064 case VerifyOption_G1UsePrevMarking: |
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3065 return hr->obj_allocated_since_prev_marking(obj); |
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3066 case VerifyOption_G1UseNextMarking: |
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3067 return hr->obj_allocated_since_next_marking(obj); |
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3068 case VerifyOption_G1UseMarkWord: |
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|
3069 return false; |
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|
3070 default: |
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|
3071 ShouldNotReachHere(); |
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|
3072 } |
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|
3073 return false; // keep some compilers happy |
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|
3074 } |
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|
3075 |
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|
3076 HeapWord* G1CollectedHeap::top_at_mark_start(HeapRegion* hr, VerifyOption vo) { |
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|
3077 switch (vo) { |
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|
3078 case VerifyOption_G1UsePrevMarking: return hr->prev_top_at_mark_start(); |
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3079 case VerifyOption_G1UseNextMarking: return hr->next_top_at_mark_start(); |
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|
3080 case VerifyOption_G1UseMarkWord: return NULL; |
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|
3081 default: ShouldNotReachHere(); |
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|
3082 } |
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|
3083 return NULL; // keep some compilers happy |
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|
3084 } |
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|
3085 |
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|
3086 bool G1CollectedHeap::is_marked(oop obj, VerifyOption vo) { |
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|
3087 switch (vo) { |
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|
3088 case VerifyOption_G1UsePrevMarking: return isMarkedPrev(obj); |
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3089 case VerifyOption_G1UseNextMarking: return isMarkedNext(obj); |
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3090 case VerifyOption_G1UseMarkWord: return obj->is_gc_marked(); |
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|
3091 default: ShouldNotReachHere(); |
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|
3092 } |
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|
3093 return false; // keep some compilers happy |
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|
3094 } |
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|
3095 |
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|
3096 const char* G1CollectedHeap::top_at_mark_start_str(VerifyOption vo) { |
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|
3097 switch (vo) { |
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|
3098 case VerifyOption_G1UsePrevMarking: return "PTAMS"; |
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|
3099 case VerifyOption_G1UseNextMarking: return "NTAMS"; |
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|
3100 case VerifyOption_G1UseMarkWord: return "NONE"; |
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|
3101 default: ShouldNotReachHere(); |
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|
3102 } |
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|
3103 return NULL; // keep some compilers happy |
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|
3104 } |
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|
3105 |
17636
889068b9a088
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|
3106 class VerifyRootsClosure: public OopClosure { |
12080 | 3107 private: |
3108 G1CollectedHeap* _g1h; | |
3109 VerifyOption _vo; | |
3110 bool _failures; | |
3111 public: | |
3112 // _vo == UsePrevMarking -> use "prev" marking information, | |
3113 // _vo == UseNextMarking -> use "next" marking information, | |
3114 // _vo == UseMarkWord -> use mark word from object header. | |
3115 VerifyRootsClosure(VerifyOption vo) : | |
3116 _g1h(G1CollectedHeap::heap()), | |
3117 _vo(vo), | |
3118 _failures(false) { } | |
3119 | |
3120 bool failures() { return _failures; } | |
3121 | |
3122 template <class T> void do_oop_nv(T* p) { | |
3123 T heap_oop = oopDesc::load_heap_oop(p); | |
3124 if (!oopDesc::is_null(heap_oop)) { | |
3125 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
3126 if (_g1h->is_obj_dead_cond(obj, _vo)) { | |
3127 gclog_or_tty->print_cr("Root location "PTR_FORMAT" " | |
3128 "points to dead obj "PTR_FORMAT, p, (void*) obj); | |
3129 if (_vo == VerifyOption_G1UseMarkWord) { | |
3130 gclog_or_tty->print_cr(" Mark word: "PTR_FORMAT, (void*)(obj->mark())); | |
3131 } | |
3132 obj->print_on(gclog_or_tty); | |
3133 _failures = true; | |
3134 } | |
3135 } | |
3136 } | |
3137 | |
3138 void do_oop(oop* p) { do_oop_nv(p); } | |
3139 void do_oop(narrowOop* p) { do_oop_nv(p); } | |
3140 }; | |
3141 | |
17636
889068b9a088
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tschatzl
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|
3142 class G1VerifyCodeRootOopClosure: public OopClosure { |
12080 | 3143 G1CollectedHeap* _g1h; |
3144 OopClosure* _root_cl; | |
3145 nmethod* _nm; | |
3146 VerifyOption _vo; | |
3147 bool _failures; | |
3148 | |
3149 template <class T> void do_oop_work(T* p) { | |
3150 // First verify that this root is live | |
3151 _root_cl->do_oop(p); | |
3152 | |
3153 if (!G1VerifyHeapRegionCodeRoots) { | |
3154 // We're not verifying the code roots attached to heap region. | |
3155 return; | |
3156 } | |
3157 | |
3158 // Don't check the code roots during marking verification in a full GC | |
3159 if (_vo == VerifyOption_G1UseMarkWord) { | |
3160 return; | |
3161 } | |
3162 | |
3163 // Now verify that the current nmethod (which contains p) is | |
3164 // in the code root list of the heap region containing the | |
3165 // object referenced by p. | |
3166 | |
3167 T heap_oop = oopDesc::load_heap_oop(p); | |
3168 if (!oopDesc::is_null(heap_oop)) { | |
3169 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
3170 | |
3171 // Now fetch the region containing the object | |
3172 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
3173 HeapRegionRemSet* hrrs = hr->rem_set(); | |
3174 // Verify that the strong code root list for this region | |
3175 // contains the nmethod | |
3176 if (!hrrs->strong_code_roots_list_contains(_nm)) { | |
3177 gclog_or_tty->print_cr("Code root location "PTR_FORMAT" " | |
3178 "from nmethod "PTR_FORMAT" not in strong " | |
3179 "code roots for region ["PTR_FORMAT","PTR_FORMAT")", | |
3180 p, _nm, hr->bottom(), hr->end()); | |
3181 _failures = true; | |
3182 } | |
3183 } | |
3184 } | |
3185 | |
3186 public: | |
3187 G1VerifyCodeRootOopClosure(G1CollectedHeap* g1h, OopClosure* root_cl, VerifyOption vo): | |
3188 _g1h(g1h), _root_cl(root_cl), _vo(vo), _nm(NULL), _failures(false) {} | |
3189 | |
3190 void do_oop(oop* p) { do_oop_work(p); } | |
3191 void do_oop(narrowOop* p) { do_oop_work(p); } | |
3192 | |
3193 void set_nmethod(nmethod* nm) { _nm = nm; } | |
3194 bool failures() { return _failures; } | |
3195 }; | |
3196 | |
3197 class G1VerifyCodeRootBlobClosure: public CodeBlobClosure { | |
3198 G1VerifyCodeRootOopClosure* _oop_cl; | |
3199 | |
3200 public: | |
3201 G1VerifyCodeRootBlobClosure(G1VerifyCodeRootOopClosure* oop_cl): | |
3202 _oop_cl(oop_cl) {} | |
3203 | |
3204 void do_code_blob(CodeBlob* cb) { | |
3205 nmethod* nm = cb->as_nmethod_or_null(); | |
3206 if (nm != NULL) { | |
3207 _oop_cl->set_nmethod(nm); | |
3208 nm->oops_do(_oop_cl); | |
3209 } | |
3210 } | |
3211 }; | |
3212 | |
3213 class YoungRefCounterClosure : public OopClosure { | |
3214 G1CollectedHeap* _g1h; | |
3215 int _count; | |
3216 public: | |
3217 YoungRefCounterClosure(G1CollectedHeap* g1h) : _g1h(g1h), _count(0) {} | |
3218 void do_oop(oop* p) { if (_g1h->is_in_young(*p)) { _count++; } } | |
3219 void do_oop(narrowOop* p) { ShouldNotReachHere(); } | |
3220 | |
3221 int count() { return _count; } | |
3222 void reset_count() { _count = 0; }; | |
3223 }; | |
3224 | |
3225 class VerifyKlassClosure: public KlassClosure { | |
3226 YoungRefCounterClosure _young_ref_counter_closure; | |
3227 OopClosure *_oop_closure; | |
3228 public: | |
3229 VerifyKlassClosure(G1CollectedHeap* g1h, OopClosure* cl) : _young_ref_counter_closure(g1h), _oop_closure(cl) {} | |
3230 void do_klass(Klass* k) { | |
3231 k->oops_do(_oop_closure); | |
3232 | |
3233 _young_ref_counter_closure.reset_count(); | |
3234 k->oops_do(&_young_ref_counter_closure); | |
3235 if (_young_ref_counter_closure.count() > 0) { | |
3236 guarantee(k->has_modified_oops(), err_msg("Klass %p, has young refs but is not dirty.", k)); | |
3237 } | |
3238 } | |
3239 }; | |
3240 | |
342 | 3241 class VerifyLivenessOopClosure: public OopClosure { |
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3242 G1CollectedHeap* _g1h; |
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3243 VerifyOption _vo; |
342 | 3244 public: |
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3245 VerifyLivenessOopClosure(G1CollectedHeap* g1h, VerifyOption vo): |
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3246 _g1h(g1h), _vo(vo) |
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3247 { } |
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3248 void do_oop(narrowOop *p) { do_oop_work(p); } |
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3249 void do_oop( oop *p) { do_oop_work(p); } |
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3250 |
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3251 template <class T> void do_oop_work(T *p) { |
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3252 oop obj = oopDesc::load_decode_heap_oop(p); |
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3253 guarantee(obj == NULL || !_g1h->is_obj_dead_cond(obj, _vo), |
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3254 "Dead object referenced by a not dead object"); |
342 | 3255 } |
3256 }; | |
3257 | |
3258 class VerifyObjsInRegionClosure: public ObjectClosure { | |
811 | 3259 private: |
342 | 3260 G1CollectedHeap* _g1h; |
3261 size_t _live_bytes; | |
3262 HeapRegion *_hr; | |
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3263 VerifyOption _vo; |
342 | 3264 public: |
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3265 // _vo == UsePrevMarking -> use "prev" marking information, |
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3266 // _vo == UseNextMarking -> use "next" marking information, |
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3267 // _vo == UseMarkWord -> use mark word from object header. |
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3268 VerifyObjsInRegionClosure(HeapRegion *hr, VerifyOption vo) |
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3269 : _live_bytes(0), _hr(hr), _vo(vo) { |
342 | 3270 _g1h = G1CollectedHeap::heap(); |
3271 } | |
3272 void do_object(oop o) { | |
3772
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3273 VerifyLivenessOopClosure isLive(_g1h, _vo); |
342 | 3274 assert(o != NULL, "Huh?"); |
3772
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3275 if (!_g1h->is_obj_dead_cond(o, _vo)) { |
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3276 // If the object is alive according to the mark word, |
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3277 // then verify that the marking information agrees. |
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|
3278 // Note we can't verify the contra-positive of the |
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|
3279 // above: if the object is dead (according to the mark |
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3280 // word), it may not be marked, or may have been marked |
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3281 // but has since became dead, or may have been allocated |
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|
3282 // since the last marking. |
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|
3283 if (_vo == VerifyOption_G1UseMarkWord) { |
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3284 guarantee(!_g1h->is_obj_dead(o), "mark word and concurrent mark mismatch"); |
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3285 } |
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|
3286 |
6725
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|
3287 o->oop_iterate_no_header(&isLive); |
1389
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|
3288 if (!_hr->obj_allocated_since_prev_marking(o)) { |
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3289 size_t obj_size = o->size(); // Make sure we don't overflow |
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3290 _live_bytes += (obj_size * HeapWordSize); |
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|
3291 } |
342 | 3292 } |
3293 } | |
3294 size_t live_bytes() { return _live_bytes; } | |
3295 }; | |
3296 | |
3297 class PrintObjsInRegionClosure : public ObjectClosure { | |
3298 HeapRegion *_hr; | |
3299 G1CollectedHeap *_g1; | |
3300 public: | |
3301 PrintObjsInRegionClosure(HeapRegion *hr) : _hr(hr) { | |
3302 _g1 = G1CollectedHeap::heap(); | |
3303 }; | |
3304 | |
3305 void do_object(oop o) { | |
3306 if (o != NULL) { | |
3307 HeapWord *start = (HeapWord *) o; | |
3308 size_t word_sz = o->size(); | |
3309 gclog_or_tty->print("\nPrinting obj "PTR_FORMAT" of size " SIZE_FORMAT | |
3310 " isMarkedPrev %d isMarkedNext %d isAllocSince %d\n", | |
3311 (void*) o, word_sz, | |
3312 _g1->isMarkedPrev(o), | |
3313 _g1->isMarkedNext(o), | |
3314 _hr->obj_allocated_since_prev_marking(o)); | |
3315 HeapWord *end = start + word_sz; | |
3316 HeapWord *cur; | |
3317 int *val; | |
3318 for (cur = start; cur < end; cur++) { | |
3319 val = (int *) cur; | |
3320 gclog_or_tty->print("\t "PTR_FORMAT":"PTR_FORMAT"\n", val, *val); | |
3321 } | |
3322 } | |
3323 } | |
3324 }; | |
3325 | |
3326 class VerifyRegionClosure: public HeapRegionClosure { | |
811 | 3327 private: |
6254
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3328 bool _par; |
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|
3329 VerifyOption _vo; |
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|
3330 bool _failures; |
811 | 3331 public: |
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3332 // _vo == UsePrevMarking -> use "prev" marking information, |
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3333 // _vo == UseNextMarking -> use "next" marking information, |
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|
3334 // _vo == UseMarkWord -> use mark word from object header. |
6008 | 3335 VerifyRegionClosure(bool par, VerifyOption vo) |
3336 : _par(par), | |
3772
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|
3337 _vo(vo), |
1020
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|
3338 _failures(false) {} |
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|
3339 |
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|
3340 bool failures() { |
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|
3341 return _failures; |
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|
3342 } |
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|
3343 |
342 | 3344 bool doHeapRegion(HeapRegion* r) { |
637
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|
3345 if (!r->continuesHumongous()) { |
1020
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|
3346 bool failures = false; |
6008 | 3347 r->verify(_vo, &failures); |
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|
3348 if (failures) { |
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|
3349 _failures = true; |
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|
3350 } else { |
3772
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|
3351 VerifyObjsInRegionClosure not_dead_yet_cl(r, _vo); |
1020
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|
3352 r->object_iterate(¬_dead_yet_cl); |
4787
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|
3353 if (_vo != VerifyOption_G1UseNextMarking) { |
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|
3354 if (r->max_live_bytes() < not_dead_yet_cl.live_bytes()) { |
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|
3355 gclog_or_tty->print_cr("["PTR_FORMAT","PTR_FORMAT"] " |
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|
3356 "max_live_bytes "SIZE_FORMAT" " |
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changeset
|
3357 "< calculated "SIZE_FORMAT, |
2ace1c4ee8da
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changeset
|
3358 r->bottom(), r->end(), |
2ace1c4ee8da
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|
3359 r->max_live_bytes(), |
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|
3360 not_dead_yet_cl.live_bytes()); |
4787
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|
3361 _failures = true; |
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|
3362 } |
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|
3363 } else { |
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|
3364 // When vo == UseNextMarking we cannot currently do a sanity |
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|
3365 // check on the live bytes as the calculation has not been |
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|
3366 // finalized yet. |
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|
3367 } |
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|
3368 } |
342 | 3369 } |
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|
3370 return false; // stop the region iteration if we hit a failure |
342 | 3371 } |
3372 }; | |
3373 | |
12080 | 3374 // This is the task used for parallel verification of the heap regions |
390 | 3375 |
3376 class G1ParVerifyTask: public AbstractGangTask { | |
3377 private: | |
3378 G1CollectedHeap* _g1h; | |
3772
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|
3379 VerifyOption _vo; |
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|
3380 bool _failures; |
390 | 3381 |
3382 public: | |
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|
3383 // _vo == UsePrevMarking -> use "prev" marking information, |
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|
3384 // _vo == UseNextMarking -> use "next" marking information, |
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|
3385 // _vo == UseMarkWord -> use mark word from object header. |
6008 | 3386 G1ParVerifyTask(G1CollectedHeap* g1h, VerifyOption vo) : |
390 | 3387 AbstractGangTask("Parallel verify task"), |
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3388 _g1h(g1h), |
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|
3389 _vo(vo), |
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|
3390 _failures(false) { } |
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|
3391 |
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|
3392 bool failures() { |
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|
3393 return _failures; |
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|
3394 } |
390 | 3395 |
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|
3396 void work(uint worker_id) { |
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|
3397 HandleMark hm; |
6008 | 3398 VerifyRegionClosure blk(true, _vo); |
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|
3399 _g1h->heap_region_par_iterate_chunked(&blk, worker_id, |
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diff
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|
3400 _g1h->workers()->active_workers(), |
390 | 3401 HeapRegion::ParVerifyClaimValue); |
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|
3402 if (blk.failures()) { |
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|
3403 _failures = true; |
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|
3404 } |
390 | 3405 } |
3406 }; | |
3407 | |
12080 | 3408 void G1CollectedHeap::verify(bool silent, VerifyOption vo) { |
8855
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|
3409 if (SafepointSynchronize::is_at_safepoint()) { |
12080 | 3410 assert(Thread::current()->is_VM_thread(), |
3411 "Expected to be executed serially by the VM thread at this point"); | |
3412 | |
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|
3413 if (!silent) { gclog_or_tty->print("Roots "); } |
3772
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|
3414 VerifyRootsClosure rootsCl(vo); |
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|
3415 VerifyKlassClosure klassCl(this, &rootsCl); |
20278
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8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
3416 CLDToKlassAndOopClosure cldCl(&klassCl, &rootsCl, false); |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3417 |
3293
1f4413413144
7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
ysr
parents:
3289
diff
changeset
|
3418 // We apply the relevant closures to all the oops in the |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
3419 // system dictionary, class loader data graph, the string table |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
3420 // and the nmethods in the code cache. |
20257
7426d8d76305
8034761: Remove the do_code_roots parameter from process_strong_roots
stefank
parents:
20256
diff
changeset
|
3421 G1VerifyCodeRootOopClosure codeRootsCl(this, &rootsCl, vo); |
7426d8d76305
8034761: Remove the do_code_roots parameter from process_strong_roots
stefank
parents:
20256
diff
changeset
|
3422 G1VerifyCodeRootBlobClosure blobsCl(&codeRootsCl); |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
3423 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
3424 process_all_roots(true, // activate StrongRootsScope |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
3425 SO_AllCodeCache, // roots scanning options |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
3426 &rootsCl, |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
3427 &cldCl, |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
3428 &blobsCl); |
20257
7426d8d76305
8034761: Remove the do_code_roots parameter from process_strong_roots
stefank
parents:
20256
diff
changeset
|
3429 |
12080 | 3430 bool failures = rootsCl.failures() || codeRootsCl.failures(); |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3431 |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3432 if (vo != VerifyOption_G1UseMarkWord) { |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3433 // If we're verifying during a full GC then the region sets |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3434 // will have been torn down at the start of the GC. Therefore |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3435 // verifying the region sets will fail. So we only verify |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3436 // the region sets when not in a full GC. |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3437 if (!silent) { gclog_or_tty->print("HeapRegionSets "); } |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3438 verify_region_sets(); |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3439 } |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3440 |
2152 | 3441 if (!silent) { gclog_or_tty->print("HeapRegions "); } |
390 | 3442 if (GCParallelVerificationEnabled && ParallelGCThreads > 1) { |
3443 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
3444 "sanity check"); | |
3445 | |
6008 | 3446 G1ParVerifyTask task(this, vo); |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3447 assert(UseDynamicNumberOfGCThreads || |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3448 workers()->active_workers() == workers()->total_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3449 "If not dynamic should be using all the workers"); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3450 int n_workers = workers()->active_workers(); |
390 | 3451 set_par_threads(n_workers); |
3452 workers()->run_task(&task); | |
3453 set_par_threads(0); | |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3454 if (task.failures()) { |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3455 failures = true; |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3456 } |
390 | 3457 |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3458 // Checks that the expected amount of parallel work was done. |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3459 // The implication is that n_workers is > 0. |
390 | 3460 assert(check_heap_region_claim_values(HeapRegion::ParVerifyClaimValue), |
3461 "sanity check"); | |
3462 | |
3463 reset_heap_region_claim_values(); | |
3464 | |
3465 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
3466 "sanity check"); | |
3467 } else { | |
6008 | 3468 VerifyRegionClosure blk(false, vo); |
3766 | 3469 heap_region_iterate(&blk); |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3470 if (blk.failures()) { |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3471 failures = true; |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3472 } |
390 | 3473 } |
2152 | 3474 if (!silent) gclog_or_tty->print("RemSet "); |
342 | 3475 rem_set()->verify(); |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3476 |
17764 | 3477 if (G1StringDedup::is_enabled()) { |
3478 if (!silent) gclog_or_tty->print("StrDedup "); | |
3479 G1StringDedup::verify(); | |
3480 } | |
3481 | |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3482 if (failures) { |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3483 gclog_or_tty->print_cr("Heap:"); |
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3484 // It helps to have the per-region information in the output to |
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3485 // help us track down what went wrong. This is why we call |
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3486 // print_extended_on() instead of print_on(). |
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3487 print_extended_on(gclog_or_tty); |
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17935
diff
changeset
|
3488 gclog_or_tty->cr(); |
1547
fb1a39993f69
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
1545
diff
changeset
|
3489 #ifndef PRODUCT |
1044 | 3490 if (VerifyDuringGC && G1VerifyDuringGCPrintReachable) { |
1388 | 3491 concurrent_mark()->print_reachable("at-verification-failure", |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3492 vo, false /* all */); |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3493 } |
1547
fb1a39993f69
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
1545
diff
changeset
|
3494 #endif |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3495 gclog_or_tty->flush(); |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3496 } |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3497 guarantee(!failures, "there should not have been any failures"); |
342 | 3498 } else { |
17764 | 3499 if (!silent) { |
3500 gclog_or_tty->print("(SKIPPING Roots, HeapRegionSets, HeapRegions, RemSet"); | |
3501 if (G1StringDedup::is_enabled()) { | |
3502 gclog_or_tty->print(", StrDedup"); | |
3503 } | |
3504 gclog_or_tty->print(") "); | |
3505 } | |
342 | 3506 } |
3507 } | |
3508 | |
12080 | 3509 void G1CollectedHeap::verify(bool silent) { |
3510 verify(silent, VerifyOption_G1UsePrevMarking); | |
3511 } | |
3512 | |
3513 double G1CollectedHeap::verify(bool guard, const char* msg) { | |
3514 double verify_time_ms = 0.0; | |
3515 | |
3516 if (guard && total_collections() >= VerifyGCStartAt) { | |
3517 double verify_start = os::elapsedTime(); | |
3518 HandleMark hm; // Discard invalid handles created during verification | |
3519 prepare_for_verify(); | |
3520 Universe::verify(VerifyOption_G1UsePrevMarking, msg); | |
3521 verify_time_ms = (os::elapsedTime() - verify_start) * 1000; | |
3522 } | |
3523 | |
3524 return verify_time_ms; | |
3525 } | |
3526 | |
3527 void G1CollectedHeap::verify_before_gc() { | |
3528 double verify_time_ms = verify(VerifyBeforeGC, " VerifyBeforeGC:"); | |
3529 g1_policy()->phase_times()->record_verify_before_time_ms(verify_time_ms); | |
3530 } | |
3531 | |
3532 void G1CollectedHeap::verify_after_gc() { | |
3533 double verify_time_ms = verify(VerifyAfterGC, " VerifyAfterGC:"); | |
3534 g1_policy()->phase_times()->record_verify_after_time_ms(verify_time_ms); | |
3535 } | |
3536 | |
342 | 3537 class PrintRegionClosure: public HeapRegionClosure { |
3538 outputStream* _st; | |
3539 public: | |
3540 PrintRegionClosure(outputStream* st) : _st(st) {} | |
3541 bool doHeapRegion(HeapRegion* r) { | |
3542 r->print_on(_st); | |
3543 return false; | |
3544 } | |
3545 }; | |
3546 | |
17833
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3547 bool G1CollectedHeap::is_obj_dead_cond(const oop obj, |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3548 const HeapRegion* hr, |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3549 const VerifyOption vo) const { |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3550 switch (vo) { |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3551 case VerifyOption_G1UsePrevMarking: return is_obj_dead(obj, hr); |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3552 case VerifyOption_G1UseNextMarking: return is_obj_ill(obj, hr); |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3553 case VerifyOption_G1UseMarkWord: return !obj->is_gc_marked(); |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3554 default: ShouldNotReachHere(); |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3555 } |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3556 return false; // keep some compilers happy |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3557 } |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3558 |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3559 bool G1CollectedHeap::is_obj_dead_cond(const oop obj, |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3560 const VerifyOption vo) const { |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3561 switch (vo) { |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3562 case VerifyOption_G1UsePrevMarking: return is_obj_dead(obj); |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3563 case VerifyOption_G1UseNextMarking: return is_obj_ill(obj); |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3564 case VerifyOption_G1UseMarkWord: return !obj->is_gc_marked(); |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3565 default: ShouldNotReachHere(); |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3566 } |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3567 return false; // keep some compilers happy |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3568 } |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3569 |
342 | 3570 void G1CollectedHeap::print_on(outputStream* st) const { |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3571 st->print(" %-20s", "garbage-first heap"); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3572 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
|
3573 capacity()/K, used_unlocked()/K); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3574 st->print(" [" INTPTR_FORMAT ", " INTPTR_FORMAT ", " INTPTR_FORMAT ")", |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3575 _g1_storage.low_boundary(), |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3576 _g1_storage.high(), |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3577 _g1_storage.high_boundary()); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3578 st->cr(); |
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3983
diff
changeset
|
3579 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
|
3580 uint young_regions = _young_list->length(); |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3581 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
|
3582 (size_t) young_regions * HeapRegion::GrainBytes / K); |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3583 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
|
3584 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
|
3585 (size_t) survivor_regions * HeapRegion::GrainBytes / K); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3586 st->cr(); |
6863
04155d9c8c76
8000358: G1: metaspace information not printed in PrintHeapAtGC output nor in hs_err file
johnc
parents:
6819
diff
changeset
|
3587 MetaspaceAux::print_on(st); |
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3588 } |
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3589 |
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3590 void G1CollectedHeap::print_extended_on(outputStream* st) const { |
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3591 print_on(st); |
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3592 |
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3593 // Print the per-region information. |
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3594 st->cr(); |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3595 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
|
3596 "HS=humongous(starts), HC=humongous(continues), " |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3597 "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
|
3598 "PTAMS=previous top-at-mark-start, " |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3599 "NTAMS=next top-at-mark-start)"); |
342 | 3600 PrintRegionClosure blk(st); |
3766 | 3601 heap_region_iterate(&blk); |
342 | 3602 } |
3603 | |
9076
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3604 void G1CollectedHeap::print_on_error(outputStream* st) const { |
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3605 this->CollectedHeap::print_on_error(st); |
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3606 |
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3607 if (_cm != NULL) { |
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|
3608 st->cr(); |
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3609 _cm->print_on_error(st); |
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|
3610 } |
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|
3611 } |
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3612 |
342 | 3613 void G1CollectedHeap::print_gc_threads_on(outputStream* st) const { |
1833
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|
3614 if (G1CollectedHeap::use_parallel_gc_threads()) { |
1019 | 3615 workers()->print_worker_threads_on(st); |
3616 } | |
3617 _cmThread->print_on(st); | |
342 | 3618 st->cr(); |
1019 | 3619 _cm->print_worker_threads_on(st); |
3620 _cg1r->print_worker_threads_on(st); | |
17764 | 3621 if (G1StringDedup::is_enabled()) { |
3622 G1StringDedup::print_worker_threads_on(st); | |
3623 } | |
342 | 3624 } |
3625 | |
3626 void G1CollectedHeap::gc_threads_do(ThreadClosure* tc) const { | |
1833
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3627 if (G1CollectedHeap::use_parallel_gc_threads()) { |
342 | 3628 workers()->threads_do(tc); |
3629 } | |
3630 tc->do_thread(_cmThread); | |
794 | 3631 _cg1r->threads_do(tc); |
17764 | 3632 if (G1StringDedup::is_enabled()) { |
3633 G1StringDedup::threads_do(tc); | |
3634 } | |
342 | 3635 } |
3636 | |
3637 void G1CollectedHeap::print_tracing_info() const { | |
3638 // We'll overload this to mean "trace GC pause statistics." | |
3639 if (TraceGen0Time || TraceGen1Time) { | |
3640 // The "G1CollectorPolicy" is keeping track of these stats, so delegate | |
3641 // to that. | |
3642 g1_policy()->print_tracing_info(); | |
3643 } | |
751 | 3644 if (G1SummarizeRSetStats) { |
342 | 3645 g1_rem_set()->print_summary_info(); |
3646 } | |
1282 | 3647 if (G1SummarizeConcMark) { |
342 | 3648 concurrent_mark()->print_summary_info(); |
3649 } | |
3650 g1_policy()->print_yg_surv_rate_info(); | |
3651 SpecializationStats::print(); | |
3652 } | |
3653 | |
3777
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|
3654 #ifndef PRODUCT |
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|
3655 // Helpful for debugging RSet issues. |
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|
3656 |
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3657 class PrintRSetsClosure : public HeapRegionClosure { |
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|
3658 private: |
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|
3659 const char* _msg; |
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|
3660 size_t _occupied_sum; |
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|
3661 |
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|
3662 public: |
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|
3663 bool doHeapRegion(HeapRegion* r) { |
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3664 HeapRegionRemSet* hrrs = r->rem_set(); |
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|
3665 size_t occupied = hrrs->occupied(); |
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|
3666 _occupied_sum += occupied; |
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|
3667 |
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|
3668 gclog_or_tty->print_cr("Printing RSet for region "HR_FORMAT, |
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|
3669 HR_FORMAT_PARAMS(r)); |
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|
3670 if (occupied == 0) { |
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|
3671 gclog_or_tty->print_cr(" RSet is empty"); |
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|
3672 } else { |
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|
3673 hrrs->print(); |
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|
3674 } |
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|
3675 gclog_or_tty->print_cr("----------"); |
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|
3676 return false; |
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|
3677 } |
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|
3678 |
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|
3679 PrintRSetsClosure(const char* msg) : _msg(msg), _occupied_sum(0) { |
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|
3680 gclog_or_tty->cr(); |
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|
3681 gclog_or_tty->print_cr("========================================"); |
17937
78bbf4d43a14
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diff
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|
3682 gclog_or_tty->print_cr("%s", msg); |
3777
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|
3683 gclog_or_tty->cr(); |
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|
3684 } |
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|
3685 |
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|
3686 ~PrintRSetsClosure() { |
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|
3687 gclog_or_tty->print_cr("Occupied Sum: "SIZE_FORMAT, _occupied_sum); |
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3688 gclog_or_tty->print_cr("========================================"); |
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|
3689 gclog_or_tty->cr(); |
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|
3690 } |
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|
3691 }; |
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|
3692 |
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|
3693 void G1CollectedHeap::print_cset_rsets() { |
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|
3694 PrintRSetsClosure cl("Printing CSet RSets"); |
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|
3695 collection_set_iterate(&cl); |
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|
3696 } |
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|
3697 |
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|
3698 void G1CollectedHeap::print_all_rsets() { |
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|
3699 PrintRSetsClosure cl("Printing All RSets");; |
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|
3700 heap_region_iterate(&cl); |
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|
3701 } |
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|
3702 #endif // PRODUCT |
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|
3703 |
342 | 3704 G1CollectedHeap* G1CollectedHeap::heap() { |
3705 assert(_sh->kind() == CollectedHeap::G1CollectedHeap, | |
3706 "not a garbage-first heap"); | |
3707 return _g1h; | |
3708 } | |
3709 | |
3710 void G1CollectedHeap::gc_prologue(bool full /* Ignored */) { | |
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6484c4ee11cb
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diff
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|
3711 // always_do_update_barrier = false; |
342 | 3712 assert(InlineCacheBuffer::is_empty(), "should have cleaned up ICBuffer"); |
3713 // Fill TLAB's and such | |
17727 | 3714 accumulate_statistics_all_tlabs(); |
342 | 3715 ensure_parsability(true); |
12339
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8014078: G1: improve remembered set summary information by providing per region type information
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|
3716 |
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
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|
3717 if (G1SummarizeRSetStats && (G1SummarizeRSetStatsPeriod > 0) && |
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8014078: G1: improve remembered set summary information by providing per region type information
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|
3718 (total_collections() % G1SummarizeRSetStatsPeriod == 0)) { |
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
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|
3719 g1_rem_set()->print_periodic_summary_info("Before GC RS summary"); |
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|
3720 } |
342 | 3721 } |
3722 | |
3723 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
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|
3724 |
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|
3725 if (G1SummarizeRSetStats && |
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8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
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diff
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|
3726 (G1SummarizeRSetStatsPeriod > 0) && |
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
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changeset
|
3727 // we are at the end of the GC. Total collections has already been increased. |
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diff
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|
3728 ((total_collections() - 1) % G1SummarizeRSetStatsPeriod == 0)) { |
12339
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|
3729 g1_rem_set()->print_periodic_summary_info("After GC RS summary"); |
10372
e72f7eecc96d
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|
3730 } |
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|
3731 |
342 | 3732 // FIXME: what is this about? |
3733 // I'm ignoring the "fill_newgen()" call if "alloc_event_enabled" | |
3734 // is set. | |
3735 COMPILER2_PRESENT(assert(DerivedPointerTable::is_empty(), | |
3736 "derived pointer present")); | |
1245
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|
3737 // always_do_update_barrier = true; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
3738 |
17727 | 3739 resize_all_tlabs(); |
3740 | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
3741 // We have just completed a GC. Update the soft reference |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
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|
3742 // policy with the new heap occupancy |
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6484982: G1: process references during evacuation pauses
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diff
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|
3743 Universe::update_heap_info_at_gc(); |
342 | 3744 } |
3745 | |
1973 | 3746 HeapWord* G1CollectedHeap::do_collection_pause(size_t word_size, |
3747 unsigned int gc_count_before, | |
12113
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
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changeset
|
3748 bool* succeeded, |
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diff
changeset
|
3749 GCCause::Cause gc_cause) { |
1973 | 3750 assert_heap_not_locked_and_not_at_safepoint(); |
342 | 3751 g1_policy()->record_stop_world_start(); |
1973 | 3752 VM_G1IncCollectionPause op(gc_count_before, |
3753 word_size, | |
3754 false, /* should_initiate_conc_mark */ | |
3755 g1_policy()->max_pause_time_ms(), | |
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|
3756 gc_cause); |
1973 | 3757 VMThread::execute(&op); |
3758 | |
3759 HeapWord* result = op.result(); | |
3760 bool ret_succeeded = op.prologue_succeeded() && op.pause_succeeded(); | |
3761 assert(result == NULL || ret_succeeded, | |
3762 "the result should be NULL if the VM did not succeed"); | |
3763 *succeeded = ret_succeeded; | |
3764 | |
3765 assert_heap_not_locked(); | |
3766 return result; | |
342 | 3767 } |
3768 | |
3769 void | |
3770 G1CollectedHeap::doConcurrentMark() { | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
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|
3771 MutexLockerEx x(CGC_lock, Mutex::_no_safepoint_check_flag); |
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6700789: G1: Enable use of compressed oops with G1 heaps
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|
3772 if (!_cmThread->in_progress()) { |
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6700789: G1: Enable use of compressed oops with G1 heaps
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parents:
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diff
changeset
|
3773 _cmThread->set_started(); |
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6700789: G1: Enable use of compressed oops with G1 heaps
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|
3774 CGC_lock->notify(); |
342 | 3775 } |
3776 } | |
3777 | |
3778 size_t G1CollectedHeap::pending_card_num() { | |
3779 size_t extra_cards = 0; | |
3780 JavaThread *curr = Threads::first(); | |
3781 while (curr != NULL) { | |
3782 DirtyCardQueue& dcq = curr->dirty_card_queue(); | |
3783 extra_cards += dcq.size(); | |
3784 curr = curr->next(); | |
3785 } | |
3786 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
3787 size_t buffer_size = dcqs.buffer_size(); | |
3788 size_t buffer_num = dcqs.completed_buffers_num(); | |
6611 | 3789 |
3790 // PtrQueueSet::buffer_size() and PtrQueue:size() return sizes | |
3791 // in bytes - not the number of 'entries'. We need to convert | |
3792 // into a number of cards. | |
3793 return (buffer_size * buffer_num + extra_cards) / oopSize; | |
342 | 3794 } |
3795 | |
3796 size_t G1CollectedHeap::cards_scanned() { | |
1861 | 3797 return g1_rem_set()->cardsScanned(); |
342 | 3798 } |
3799 | |
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|
3800 bool G1CollectedHeap::humongous_region_is_always_live(uint index) { |
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|
3801 HeapRegion* region = region_at(index); |
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diff
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|
3802 assert(region->startsHumongous(), "Must start a humongous object"); |
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|
3803 return oop(region->bottom())->is_objArray() || !region->rem_set()->is_empty(); |
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|
3804 } |
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diff
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|
3805 |
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|
3806 class RegisterHumongousWithInCSetFastTestClosure : public HeapRegionClosure { |
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20304
diff
changeset
|
3807 private: |
755930f931e3
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tschatzl
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20304
diff
changeset
|
3808 size_t _total_humongous; |
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diff
changeset
|
3809 size_t _candidate_humongous; |
755930f931e3
8027959: Early reclamation of large objects in G1
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diff
changeset
|
3810 public: |
755930f931e3
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tschatzl
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20304
diff
changeset
|
3811 RegisterHumongousWithInCSetFastTestClosure() : _total_humongous(0), _candidate_humongous(0) { |
755930f931e3
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|
3812 } |
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tschatzl
parents:
20304
diff
changeset
|
3813 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3814 virtual bool doHeapRegion(HeapRegion* r) { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3815 if (!r->startsHumongous()) { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3816 return false; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3817 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3818 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3819 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3820 uint region_idx = r->hrs_index(); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3821 bool is_candidate = !g1h->humongous_region_is_always_live(region_idx); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3822 // Is_candidate already filters out humongous regions with some remembered set. |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3823 // This will not lead to humongous object that we mistakenly keep alive because |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3824 // during young collection the remembered sets will only be added to. |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3825 if (is_candidate) { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3826 g1h->register_humongous_region_with_in_cset_fast_test(region_idx); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3827 _candidate_humongous++; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3828 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3829 _total_humongous++; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3830 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3831 return false; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3832 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3833 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3834 size_t total_humongous() const { return _total_humongous; } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3835 size_t candidate_humongous() const { return _candidate_humongous; } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3836 }; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3837 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3838 void G1CollectedHeap::register_humongous_regions_with_in_cset_fast_test() { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3839 if (!G1ReclaimDeadHumongousObjectsAtYoungGC) { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3840 g1_policy()->phase_times()->record_fast_reclaim_humongous_stats(0, 0); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3841 return; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3842 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3843 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3844 RegisterHumongousWithInCSetFastTestClosure cl; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3845 heap_region_iterate(&cl); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3846 g1_policy()->phase_times()->record_fast_reclaim_humongous_stats(cl.total_humongous(), |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3847 cl.candidate_humongous()); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3848 _has_humongous_reclaim_candidates = cl.candidate_humongous() > 0; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3849 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3850 if (_has_humongous_reclaim_candidates) { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3851 clear_humongous_is_live_table(); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3852 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3853 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3854 |
342 | 3855 void |
3856 G1CollectedHeap::setup_surviving_young_words() { | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3857 assert(_surviving_young_words == NULL, "pre-condition"); |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3858 uint array_length = g1_policy()->young_cset_region_length(); |
6197 | 3859 _surviving_young_words = NEW_C_HEAP_ARRAY(size_t, (size_t) array_length, mtGC); |
342 | 3860 if (_surviving_young_words == NULL) { |
10161
746b070f5022
8011661: Insufficient memory message says "malloc" when sometimes it should say "mmap"
ccheung
parents:
10099
diff
changeset
|
3861 vm_exit_out_of_memory(sizeof(size_t) * array_length, OOM_MALLOC_ERROR, |
342 | 3862 "Not enough space for young surv words summary."); |
3863 } | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3864 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
|
3865 #ifdef ASSERT |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3866 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
|
3867 assert( _surviving_young_words[i] == 0, "memset above" ); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3868 } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3869 #endif // !ASSERT |
342 | 3870 } |
3871 | |
3872 void | |
3873 G1CollectedHeap::update_surviving_young_words(size_t* surv_young_words) { | |
3874 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
|
3875 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
|
3876 for (uint i = 0; i < array_length; ++i) { |
342 | 3877 _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
|
3878 } |
342 | 3879 } |
3880 | |
3881 void | |
3882 G1CollectedHeap::cleanup_surviving_young_words() { | |
3883 guarantee( _surviving_young_words != NULL, "pre-condition" ); | |
6197 | 3884 FREE_C_HEAP_ARRAY(size_t, _surviving_young_words, mtGC); |
342 | 3885 _surviving_young_words = NULL; |
3886 } | |
3887 | |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3888 #ifdef ASSERT |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3889 class VerifyCSetClosure: public HeapRegionClosure { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3890 public: |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3891 bool doHeapRegion(HeapRegion* hr) { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3892 // 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
|
3893 // 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
|
3894 // 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
|
3895 // 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
|
3896 // 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
|
3897 // 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
|
3898 // 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
|
3899 // 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
|
3900 // evacuation failure handling. |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3901 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
|
3902 |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3903 // 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
|
3904 // perform on CSet regions. |
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3905 return false; |
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3906 } |
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3907 }; |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3908 #endif // ASSERT |
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3909 |
1709 | 3910 #if TASKQUEUE_STATS |
3911 void G1CollectedHeap::print_taskqueue_stats_hdr(outputStream* const st) { | |
3912 st->print_raw_cr("GC Task Stats"); | |
3913 st->print_raw("thr "); TaskQueueStats::print_header(1, st); st->cr(); | |
3914 st->print_raw("--- "); TaskQueueStats::print_header(2, st); st->cr(); | |
3915 } | |
3916 | |
3917 void G1CollectedHeap::print_taskqueue_stats(outputStream* const st) const { | |
3918 print_taskqueue_stats_hdr(st); | |
3919 | |
3920 TaskQueueStats totals; | |
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3921 const int n = workers() != NULL ? workers()->total_workers() : 1; |
1709 | 3922 for (int i = 0; i < n; ++i) { |
3923 st->print("%3d ", i); task_queue(i)->stats.print(st); st->cr(); | |
3924 totals += task_queue(i)->stats; | |
3925 } | |
3926 st->print_raw("tot "); totals.print(st); st->cr(); | |
3927 | |
3928 DEBUG_ONLY(totals.verify()); | |
3929 } | |
3930 | |
3931 void G1CollectedHeap::reset_taskqueue_stats() { | |
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3932 const int n = workers() != NULL ? workers()->total_workers() : 1; |
1709 | 3933 for (int i = 0; i < n; ++i) { |
3934 task_queue(i)->stats.reset(); | |
3935 } | |
3936 } | |
3937 #endif // TASKQUEUE_STATS | |
3938 | |
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3939 void G1CollectedHeap::log_gc_header() { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3940 if (!G1Log::fine()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3941 return; |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3942 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3943 |
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
3944 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
|
3945 |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3946 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
|
3947 .append(g1_policy()->gcs_are_young() ? "(young)" : "(mixed)") |
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3948 .append(g1_policy()->during_initial_mark_pause() ? " (initial-mark)" : ""); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3949 |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3950 gclog_or_tty->print("[%s", (const char*)gc_cause_str); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3951 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3952 |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3953 void G1CollectedHeap::log_gc_footer(double pause_time_sec) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3954 if (!G1Log::fine()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3955 return; |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3956 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3957 |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3958 if (G1Log::finer()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3959 if (evacuation_failed()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3960 gclog_or_tty->print(" (to-space exhausted)"); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3961 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3962 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
|
3963 g1_policy()->phase_times()->note_gc_end(); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3964 g1_policy()->phase_times()->print(pause_time_sec); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3965 g1_policy()->print_detailed_heap_transition(); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3966 } else { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3967 if (evacuation_failed()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3968 gclog_or_tty->print("--"); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3969 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3970 g1_policy()->print_heap_transition(); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3971 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
|
3972 } |
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
3973 gclog_or_tty->flush(); |
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3974 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3975 |
1973 | 3976 bool |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3977 G1CollectedHeap::do_collection_pause_at_safepoint(double target_pause_time_ms) { |
2152 | 3978 assert_at_safepoint(true /* should_be_vm_thread */); |
3979 guarantee(!is_gc_active(), "collection is not reentrant"); | |
3980 | |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3981 if (GC_locker::check_active_before_gc()) { |
1973 | 3982 return false; |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3983 } |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3984 |
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
3985 _gc_timer_stw->register_gc_start(); |
10405 | 3986 |
3987 _gc_tracer_stw->report_gc_start(gc_cause(), _gc_timer_stw->gc_start()); | |
3988 | |
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2039
diff
changeset
|
3989 SvcGCMarker sgcm(SvcGCMarker::MINOR); |
2039
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3990 ResourceMark rm; |
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3991 |
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4787
diff
changeset
|
3992 print_heap_before_gc(); |
10405 | 3993 trace_heap_before_gc(_gc_tracer_stw); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3994 |
2152 | 3995 verify_region_sets_optional(); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3996 verify_dirty_young_regions(); |
2152 | 3997 |
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3998 // 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
|
3999 // 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
|
4000 // for the duration of this pause. |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4001 g1_policy()->decide_on_conc_mark_initiation(); |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4002 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4003 // 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
|
4004 assert(!g1_policy()->during_initial_mark_pause() || |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4005 g1_policy()->gcs_are_young(), "sanity"); |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4006 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4007 // 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
|
4008 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
|
4009 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4010 // 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
|
4011 // 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
|
4012 // 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
|
4013 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
|
4014 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4015 // 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
|
4016 { |
10405 | 4017 EvacuationInfo evacuation_info; |
4018 | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
4019 if (g1_policy()->during_initial_mark_pause()) { |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
4020 // 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
|
4021 // full collection counter. |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
4022 increment_old_marking_cycles_started(); |
10405 | 4023 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
|
4024 } |
10405 | 4025 |
4026 _gc_tracer_stw->report_yc_type(yc_type()); | |
4027 | |
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
4028 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
6030 | 4029 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4030 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
|
4031 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
|
4032 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
|
4033 g1_policy()->phase_times()->note_gc_start(active_workers); |
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
4034 log_gc_header(); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4035 |
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
4036 TraceCollectorStats tcs(g1mm()->incremental_collection_counters()); |
3356
78542e2b5e35
7036199: Adding a notification to the implementation of GarbageCollectorMXBeans
fparain
parents:
3323
diff
changeset
|
4037 TraceMemoryManagerStats tms(false /* fullGC */, gc_cause()); |
1089
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
tonyp
parents:
1088
diff
changeset
|
4038 |
2361 | 4039 // If the secondary_free_list is not empty, append it to the |
4040 // free_list. No need to wait for the cleanup operation to finish; | |
4041 // the region allocation code will check the secondary_free_list | |
4042 // and wait if necessary. If the G1StressConcRegionFreeing flag is | |
4043 // set, skip this step so that the region allocation code has to | |
4044 // get entries from the secondary_free_list. | |
2152 | 4045 if (!G1StressConcRegionFreeing) { |
2361 | 4046 append_secondary_free_list_if_not_empty_with_lock(); |
2152 | 4047 } |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4048 |
12080 | 4049 assert(check_young_list_well_formed(), "young list should be well formed"); |
4050 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
4051 "sanity check"); | |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4052 |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4053 // 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
|
4054 // 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
|
4055 // it will be set. |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4056 |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4057 { // 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
|
4058 IsGCActiveMark x; |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4059 |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4060 gc_prologue(false); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4061 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
|
4062 increment_gc_time_stamp(); |
342 | 4063 |
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
|
4064 verify_before_gc(); |
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
4065 check_bitmaps("GC Start"); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4066 |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4067 COMPILER2_PRESENT(DerivedPointerTable::clear()); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4068 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4069 // Please see comment in g1CollectedHeap.hpp and |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4070 // G1CollectedHeap::ref_processing_init() to see how |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4071 // reference processing currently works in G1. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4072 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4073 // Enable discovery in the STW reference processor |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4074 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4075 true /*verify_no_refs*/); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4076 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4077 { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4078 // We want to temporarily turn off discovery by the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4079 // CM ref processor, if necessary, and turn it back on |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4080 // on again later if we do. Using a scoped |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4081 // NoRefDiscovery object will do this. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4082 NoRefDiscovery no_cm_discovery(ref_processor_cm()); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4083 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4084 // 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
|
4085 // of the collection set!). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4086 release_mutator_alloc_region(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4087 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4088 // We should call this after we retire the mutator alloc |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4089 // region(s) so that all the ALLOC / RETIRE events are generated |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4090 // before the start GC event. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4091 _hr_printer.start_gc(false /* full */, (size_t) total_collections()); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4092 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4093 // 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
|
4094 // 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
|
4095 // 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
|
4096 // |
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4097 // 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
|
4098 // |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4099 // The elapsed time induced by the start time below deliberately elides |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4100 // 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
|
4101 double sample_start_time_sec = os::elapsedTime(); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4102 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4103 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4104 gclog_or_tty->print_cr("\nBefore recording pause start.\nYoung_list:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4105 _young_list->print(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4106 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
|
4107 #endif // YOUNG_LIST_VERBOSE |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4108 |
10098
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
4109 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
|
4110 |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4111 double scan_wait_start = os::elapsedTime(); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4112 // 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
|
4113 // 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
|
4114 // 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
|
4115 // moving them during the GC. |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4116 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
|
4117 double wait_time_ms = 0.0; |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4118 if (waited) { |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4119 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
|
4120 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
|
4121 } |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4122 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
|
4123 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
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|
4124 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
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|
4125 gclog_or_tty->print_cr("\nAfter recording pause start.\nYoung_list:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
4126 _young_list->print(); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
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diff
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|
4127 #endif // YOUNG_LIST_VERBOSE |
342 | 4128 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
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|
4129 if (g1_policy()->during_initial_mark_pause()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4130 concurrent_mark()->checkpointRootsInitialPre(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4131 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4132 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
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|
4133 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
4134 gclog_or_tty->print_cr("\nBefore choosing collection set.\nYoung_list:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
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|
4135 _young_list->print(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4136 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
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|
4137 #endif // YOUNG_LIST_VERBOSE |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
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diff
changeset
|
4138 |
10405 | 4139 g1_policy()->finalize_cset(target_pause_time_ms, evacuation_info); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
4140 |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4141 register_humongous_regions_with_in_cset_fast_test(); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4142 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4143 _cm->note_start_of_gc(); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4144 // 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
|
4145 // 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
|
4146 // 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
|
4147 // ensure that the CSet has been finalized. |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4148 _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
|
4149 true /* verify_enqueued_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4150 false /* verify_thread_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4151 true /* verify_fingers */); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4152 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4153 if (_hr_printer.is_active()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4154 HeapRegion* hr = g1_policy()->collection_set(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4155 while (hr != NULL) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4156 G1HRPrinter::RegionType type; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4157 if (!hr->is_young()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4158 type = G1HRPrinter::Old; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4159 } else if (hr->is_survivor()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4160 type = G1HRPrinter::Survivor; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4161 } else { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4162 type = G1HRPrinter::Eden; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4163 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4164 _hr_printer.cset(hr); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4165 hr = hr->next_in_collection_set(); |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4166 } |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4167 } |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4168 |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
4169 #ifdef ASSERT |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4170 VerifyCSetClosure cl; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4171 collection_set_iterate(&cl); |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
4172 #endif // ASSERT |
1707 | 4173 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4174 setup_surviving_young_words(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4175 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4176 // Initialize the GC alloc regions. |
10405 | 4177 init_gc_alloc_regions(evacuation_info); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4178 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4179 // Actually do the work... |
10405 | 4180 evacuate_collection_set(evacuation_info); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4181 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4182 // 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
|
4183 // (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
|
4184 // 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
|
4185 // 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
|
4186 // we checked. |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4187 _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
|
4188 false /* verify_enqueued_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4189 true /* verify_thread_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4190 true /* verify_fingers */); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4191 |
10405 | 4192 free_collection_set(g1_policy()->collection_set(), evacuation_info); |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4193 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4194 eagerly_reclaim_humongous_regions(); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4195 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4196 g1_policy()->clear_collection_set(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4197 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4198 cleanup_surviving_young_words(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4199 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4200 // Start a new incremental collection set for the next pause. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4201 g1_policy()->start_incremental_cset_building(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4202 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4203 clear_cset_fast_test(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4204 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4205 _young_list->reset_sampled_info(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4206 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4207 // Don't check the whole heap at this point as the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4208 // GC alloc regions from this pause have been tagged |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4209 // as survivors and moved on to the survivor list. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4210 // Survivor regions will fail the !is_young() check. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4211 assert(check_young_list_empty(false /* check_heap */), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4212 "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
|
4213 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4214 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4215 gclog_or_tty->print_cr("Before recording survivors.\nYoung List:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4216 _young_list->print(); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4217 #endif // YOUNG_LIST_VERBOSE |
342 | 4218 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4219 g1_policy()->record_survivor_regions(_young_list->survivor_length(), |
10405 | 4220 _young_list->first_survivor_region(), |
4221 _young_list->last_survivor_region()); | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4222 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4223 _young_list->reset_auxilary_lists(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4224 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4225 if (evacuation_failed()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4226 _summary_bytes_used = recalculate_used(); |
10405 | 4227 uint n_queues = MAX2((int)ParallelGCThreads, 1); |
4228 for (uint i = 0; i < n_queues; i++) { | |
4229 if (_evacuation_failed_info_array[i].has_failed()) { | |
4230 _gc_tracer_stw->report_evacuation_failed(_evacuation_failed_info_array[i]); | |
4231 } | |
4232 } | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4233 } else { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4234 // The "used" of the the collection set have already been subtracted |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4235 // when they were freed. Add in the bytes evacuated. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4236 _summary_bytes_used += g1_policy()->bytes_copied_during_gc(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4237 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4238 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4239 if (g1_policy()->during_initial_mark_pause()) { |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4240 // 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
|
4241 // 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
|
4242 // appropriate initialization is done on the CM object. |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4243 concurrent_mark()->checkpointRootsInitialPost(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4244 set_marking_started(); |
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4245 // 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
|
4246 // 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
|
4247 // the current thread has completed its logging output. |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4248 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4249 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4250 allocate_dummy_regions(); |
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
4251 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4252 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4253 gclog_or_tty->print_cr("\nEnd of the pause.\nYoung_list:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4254 _young_list->print(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4255 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
|
4256 #endif // YOUNG_LIST_VERBOSE |
342 | 4257 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4258 init_mutator_alloc_region(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4259 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4260 { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4261 size_t expand_bytes = g1_policy()->expansion_amount(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4262 if (expand_bytes > 0) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4263 size_t bytes_before = capacity(); |
4785 | 4264 // No need for an ergo verbose message here, |
4265 // expansion_amount() does this when it returns a value > 0. | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4266 if (!expand(expand_bytes)) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4267 // We failed to expand the heap so let's verify that |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4268 // committed/uncommitted amount match the backing store |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4269 assert(capacity() == _g1_storage.committed_size(), "committed size mismatch"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4270 assert(max_capacity() == _g1_storage.reserved_size(), "reserved size mismatch"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4271 } |
3920
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4272 } |
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4273 } |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4274 |
10405 | 4275 // 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
|
4276 // 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
|
4277 _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
|
4278 true /* verify_enqueued_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4279 true /* verify_thread_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4280 true /* verify_fingers */); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4281 _cm->note_end_of_gc(); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4282 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4283 // 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
|
4284 // 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
|
4285 // 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
|
4286 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
|
4287 double pause_time_ms = (sample_end_time_sec - sample_start_time_sec) * MILLIUNITS; |
10405 | 4288 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
|
4289 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4290 MemoryService::track_memory_usage(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4291 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4292 // 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
|
4293 // update buffers to bring the RSets up-to-date if |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4294 // G1HRRSFlushLogBuffersOnVerify has been set. While scanning |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4295 // 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
|
4296 // regions we just allocated to (i.e., the GC alloc |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4297 // regions). However, during the last GC we called |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4298 // set_saved_mark() on all the GC alloc regions, so card |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4299 // scanning might skip the [saved_mark_word()...top()] area of |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4300 // those regions (i.e., the area we allocated objects into |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4301 // during the last GC). But it shouldn't. Given that |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4302 // saved_mark_word() is conditional on whether the GC time stamp |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4303 // 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
|
4304 // 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
|
4305 // regions and saved_mark_word() will simply return top() for |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4306 // 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
|
4307 // than iterating over the regions and fixing them. In fact, the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4308 // GC time stamp increment here also ensures that |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4309 // saved_mark_word() will return top() between pauses, i.e., |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4310 // during concurrent refinement. So we don't need the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4311 // is_gc_active() check to decided which top to use when |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4312 // scanning cards (see CR 7039627). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4313 increment_gc_time_stamp(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4314 |
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
|
4315 verify_after_gc(); |
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
4316 check_bitmaps("GC End"); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4317 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4318 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4319 ref_processor_stw()->verify_no_references_recorded(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4320 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4321 // 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
|
4322 } |
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4323 |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4324 // 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
|
4325 // 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
|
4326 // 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
|
4327 // RETIRE events are generated before the end GC event. |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4328 _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
|
4329 |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4330 if (mark_in_progress()) { |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4331 concurrent_mark()->update_g1_committed(); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4332 } |
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4333 |
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4334 #ifdef TRACESPINNING |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4335 ParallelTaskTerminator::print_termination_counts(); |
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4336 #endif |
342 | 4337 |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4338 gc_epilogue(false); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4339 } |
6121
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4340 |
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
4341 // 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
|
4342 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
|
4343 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4344 // 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
|
4345 // 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
|
4346 // 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
|
4347 // logging output either. |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4348 |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4349 _hrs.verify_optional(); |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4350 verify_region_sets_optional(); |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4351 |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4352 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
|
4353 TASKQUEUE_STATS_ONLY(reset_taskqueue_stats()); |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4354 |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4355 print_heap_after_gc(); |
10405 | 4356 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
|
4357 |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4358 // 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
|
4359 // 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
|
4360 // 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
|
4361 // before any GC notifications are raised. |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4362 g1mm()->update_sizes(); |
10405 | 4363 |
4364 _gc_tracer_stw->report_evacuation_info(&evacuation_info); | |
4365 _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
|
4366 _gc_timer_stw->register_gc_end(); |
10405 | 4367 _gc_tracer_stw->report_gc_end(_gc_timer_stw->gc_end(), _gc_timer_stw->time_partitions()); |
4368 } | |
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4369 // 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
|
4370 // 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
|
4371 // that came from the pause. |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4372 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4373 if (should_start_conc_mark) { |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4374 // CAUTION: after the doConcurrentMark() call below, |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4375 // the concurrent marking thread(s) could be running |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4376 // concurrently with us. Make sure that anything after |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4377 // 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
|
4378 // 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
|
4379 // not start until the safepoint itself is released in |
20192 | 4380 // SuspendibleThreadSet::desynchronize(). |
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4381 doConcurrentMark(); |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4382 } |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4383 |
1973 | 4384 return true; |
342 | 4385 } |
4386 | |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4387 size_t G1CollectedHeap::desired_plab_sz(GCAllocPurpose purpose) |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4388 { |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4389 size_t gclab_word_size; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4390 switch (purpose) { |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4391 case GCAllocForSurvived: |
6595 | 4392 gclab_word_size = _survivor_plab_stats.desired_plab_sz(); |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4393 break; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4394 case GCAllocForTenured: |
6595 | 4395 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4396 break; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4397 default: |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4398 assert(false, "unknown GCAllocPurpose"); |
6595 | 4399 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4400 break; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4401 } |
6595 | 4402 |
4403 // Prevent humongous PLAB sizes for two reasons: | |
4404 // * PLABs are allocated using a similar paths as oops, but should | |
4405 // never be in a humongous region | |
4406 // * Allowing humongous PLABs needlessly churns the region free lists | |
4407 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
|
4408 } |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4409 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4410 void G1CollectedHeap::init_mutator_alloc_region() { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4411 assert(_mutator_alloc_region.get() == NULL, "pre-condition"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4412 _mutator_alloc_region.init(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4413 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4414 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4415 void G1CollectedHeap::release_mutator_alloc_region() { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4416 _mutator_alloc_region.release(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4417 assert(_mutator_alloc_region.get() == NULL, "post-condition"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4418 } |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4419 |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4420 void G1CollectedHeap::use_retained_old_gc_alloc_region(EvacuationInfo& evacuation_info) { |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4421 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
|
4422 _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
|
4423 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4424 // 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
|
4425 // 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
|
4426 // 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
|
4427 // 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
|
4428 // 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
|
4429 // 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
|
4430 // during a cleanup and was added to the free list, but |
10405 | 4431 // 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
|
4432 // 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
|
4433 if (retained_region != NULL && |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4434 !retained_region->in_collection_set() && |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4435 !(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
|
4436 !retained_region->is_empty() && |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4437 !retained_region->isHumongous()) { |
20274
a8137787acfe
8047821: G1 Does not use the save_marks functionality as intended
mgerdin
parents:
20270
diff
changeset
|
4438 retained_region->record_top_and_timestamp(); |
4072 | 4439 // The retained region was added to the old region set when it was |
4440 // retired. We have to remove it now, since we don't allow regions | |
4441 // we allocate to in the region sets. We'll re-add it later, when | |
4442 // it's retired again. | |
4443 _old_set.remove(retained_region); | |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4444 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
|
4445 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
|
4446 _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
|
4447 _hr_printer.reuse(retained_region); |
10405 | 4448 evacuation_info.set_alloc_regions_used_before(retained_region->used()); |
4449 } | |
4450 } | |
4451 | |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4452 void G1CollectedHeap::init_gc_alloc_regions(EvacuationInfo& evacuation_info) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4453 assert_at_safepoint(true /* should_be_vm_thread */); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4454 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4455 _survivor_gc_alloc_region.init(); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4456 _old_gc_alloc_region.init(); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4457 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4458 use_retained_old_gc_alloc_region(evacuation_info); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4459 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4460 |
10405 | 4461 void G1CollectedHeap::release_gc_alloc_regions(uint no_of_gc_workers, EvacuationInfo& evacuation_info) { |
4462 evacuation_info.set_allocation_regions(_survivor_gc_alloc_region.count() + | |
4463 _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
|
4464 _survivor_gc_alloc_region.release(); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4465 // 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
|
4466 // _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
|
4467 // _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
|
4468 // 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
|
4469 // condition. |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4470 _retained_old_gc_alloc_region = _old_gc_alloc_region.release(); |
6595 | 4471 |
4472 if (ResizePLAB) { | |
6819 | 4473 _survivor_plab_stats.adjust_desired_plab_sz(no_of_gc_workers); |
4474 _old_plab_stats.adjust_desired_plab_sz(no_of_gc_workers); | |
6595 | 4475 } |
342 | 4476 } |
4477 | |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4478 void G1CollectedHeap::abandon_gc_alloc_regions() { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4479 assert(_survivor_gc_alloc_region.get() == NULL, "pre-condition"); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4480 assert(_old_gc_alloc_region.get() == NULL, "pre-condition"); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4481 _retained_old_gc_alloc_region = NULL; |
342 | 4482 } |
4483 | |
4484 void G1CollectedHeap::init_for_evac_failure(OopsInHeapRegionClosure* cl) { | |
4485 _drain_in_progress = false; | |
4486 set_evac_failure_closure(cl); | |
6197 | 4487 _evac_failure_scan_stack = new (ResourceObj::C_HEAP, mtGC) GrowableArray<oop>(40, true); |
342 | 4488 } |
4489 | |
4490 void G1CollectedHeap::finalize_for_evac_failure() { | |
4491 assert(_evac_failure_scan_stack != NULL && | |
4492 _evac_failure_scan_stack->length() == 0, | |
4493 "Postcondition"); | |
4494 assert(!_drain_in_progress, "Postcondition"); | |
1045 | 4495 delete _evac_failure_scan_stack; |
342 | 4496 _evac_failure_scan_stack = NULL; |
4497 } | |
4498 | |
4499 void G1CollectedHeap::remove_self_forwarding_pointers() { | |
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4500 assert(check_cset_heap_region_claim_values(HeapRegion::InitialClaimValue), "sanity"); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4501 |
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4502 double remove_self_forwards_start = os::elapsedTime(); |
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4503 |
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4504 G1ParRemoveSelfForwardPtrsTask rsfp_task(this); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4505 |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4506 if (G1CollectedHeap::use_parallel_gc_threads()) { |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4507 set_par_threads(); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4508 workers()->run_task(&rsfp_task); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4509 set_par_threads(0); |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
4510 } else { |
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4511 rsfp_task.work(0); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4512 } |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4513 |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4514 assert(check_cset_heap_region_claim_values(HeapRegion::ParEvacFailureClaimValue), "sanity"); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4515 |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4516 // Reset the claim values in the regions in the collection set. |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4517 reset_cset_heap_region_claim_values(); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4518 |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4519 assert(check_cset_heap_region_claim_values(HeapRegion::InitialClaimValue), "sanity"); |
342 | 4520 |
4521 // Now restore saved marks, if any. | |
8038
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4522 assert(_objs_with_preserved_marks.size() == |
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4523 _preserved_marks_of_objs.size(), "Both or none."); |
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4524 while (!_objs_with_preserved_marks.is_empty()) { |
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4525 oop obj = _objs_with_preserved_marks.pop(); |
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4526 markOop m = _preserved_marks_of_objs.pop(); |
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4527 obj->set_mark(m); |
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4528 } |
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4529 _objs_with_preserved_marks.clear(true); |
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4530 _preserved_marks_of_objs.clear(true); |
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4531 |
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4532 g1_policy()->phase_times()->record_evac_fail_remove_self_forwards((os::elapsedTime() - remove_self_forwards_start) * 1000.0); |
342 | 4533 } |
4534 | |
4535 void G1CollectedHeap::push_on_evac_failure_scan_stack(oop obj) { | |
4536 _evac_failure_scan_stack->push(obj); | |
4537 } | |
4538 | |
4539 void G1CollectedHeap::drain_evac_failure_scan_stack() { | |
4540 assert(_evac_failure_scan_stack != NULL, "precondition"); | |
4541 | |
4542 while (_evac_failure_scan_stack->length() > 0) { | |
4543 oop obj = _evac_failure_scan_stack->pop(); | |
4544 _evac_failure_closure->set_region(heap_region_containing(obj)); | |
4545 obj->oop_iterate_backwards(_evac_failure_closure); | |
4546 } | |
4547 } | |
4548 | |
4549 oop | |
10405 | 4550 G1CollectedHeap::handle_evacuation_failure_par(G1ParScanThreadState* _par_scan_state, |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4551 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
|
4552 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
|
4553 err_msg("obj: "PTR_FORMAT" should still be in the CSet", |
75af3e8de182
7040450: G1: assert((_g1->evacuation_failed()) || (!_g1->obj_in_cs(obj))) failed: shouldn't still be in ...
tonyp
parents:
3317
diff
changeset
|
4554 (HeapWord*) old)); |
342 | 4555 markOop m = old->mark(); |
4556 oop forward_ptr = old->forward_to_atomic(old); | |
4557 if (forward_ptr == NULL) { | |
4558 // Forward-to-self succeeded. | |
10405 | 4559 assert(_par_scan_state != NULL, "par scan state"); |
4560 OopsInHeapRegionClosure* cl = _par_scan_state->evac_failure_closure(); | |
4561 uint queue_num = _par_scan_state->queue_num(); | |
4562 | |
4563 _evacuation_failed = true; | |
4564 _evacuation_failed_info_array[queue_num].register_copy_failure(old->size()); | |
342 | 4565 if (_evac_failure_closure != cl) { |
4566 MutexLockerEx x(EvacFailureStack_lock, Mutex::_no_safepoint_check_flag); | |
4567 assert(!_drain_in_progress, | |
4568 "Should only be true while someone holds the lock."); | |
4569 // Set the global evac-failure closure to the current thread's. | |
4570 assert(_evac_failure_closure == NULL, "Or locking has failed."); | |
4571 set_evac_failure_closure(cl); | |
4572 // Now do the common part. | |
4573 handle_evacuation_failure_common(old, m); | |
4574 // Reset to NULL. | |
4575 set_evac_failure_closure(NULL); | |
4576 } else { | |
4577 // The lock is already held, and this is recursive. | |
4578 assert(_drain_in_progress, "This should only be the recursive case."); | |
4579 handle_evacuation_failure_common(old, m); | |
4580 } | |
4581 return old; | |
4582 } 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
|
4583 // 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
|
4584 // 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
|
4585 // 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
|
4586 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
|
4587 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
|
4588 "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
|
4589 (HeapWord*) old, (HeapWord*) forward_ptr)); |
342 | 4590 return forward_ptr; |
4591 } | |
4592 } | |
4593 | |
4594 void G1CollectedHeap::handle_evacuation_failure_common(oop old, markOop m) { | |
4595 preserve_mark_if_necessary(old, m); | |
4596 | |
4597 HeapRegion* r = heap_region_containing(old); | |
4598 if (!r->evacuation_failed()) { | |
4599 r->set_evacuation_failed(true); | |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4600 _hr_printer.evac_failure(r); |
342 | 4601 } |
4602 | |
4603 push_on_evac_failure_scan_stack(old); | |
4604 | |
4605 if (!_drain_in_progress) { | |
4606 // prevent recursion in copy_to_survivor_space() | |
4607 _drain_in_progress = true; | |
4608 drain_evac_failure_scan_stack(); | |
4609 _drain_in_progress = false; | |
4610 } | |
4611 } | |
4612 | |
4613 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
|
4614 assert(evacuation_failed(), "Oversaving!"); |
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4615 // 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
|
4616 // case of a promotion failure. |
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4617 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
|
4618 _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
|
4619 _preserved_marks_of_objs.push(m); |
342 | 4620 } |
4621 } | |
4622 | |
4623 HeapWord* G1CollectedHeap::par_allocate_during_gc(GCAllocPurpose purpose, | |
4624 size_t word_size) { | |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4625 if (purpose == GCAllocForSurvived) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4626 HeapWord* result = survivor_attempt_allocation(word_size); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4627 if (result != NULL) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4628 return result; |
342 | 4629 } else { |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4630 // Let's try to allocate in the old gen in case we can fit the |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4631 // object there. |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4632 return old_attempt_allocation(word_size); |
342 | 4633 } |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4634 } else { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4635 assert(purpose == GCAllocForTenured, "sanity"); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4636 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
|
4637 if (result != NULL) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4638 return result; |
342 | 4639 } else { |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4640 // Let's try to allocate in the survivors in case we can fit the |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4641 // object there. |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4642 return survivor_attempt_allocation(word_size); |
342 | 4643 } |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4644 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4645 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4646 ShouldNotReachHere(); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4647 // Trying to keep some compilers happy. |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4648 return NULL; |
342 | 4649 } |
4650 | |
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4651 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
|
4652 ParGCAllocBuffer(gclab_word_size), _retired(true) { } |
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4653 |
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4654 void G1ParCopyHelper::mark_object(oop obj) { |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4655 #ifdef ASSERT |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4656 HeapRegion* hr = _g1->heap_region_containing(obj); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4657 assert(hr != NULL, "sanity"); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4658 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
|
4659 #endif // ASSERT |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4660 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4661 // 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
|
4662 _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
|
4663 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4664 |
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4665 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
|
4666 #ifdef ASSERT |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4667 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
|
4668 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
|
4669 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
|
4670 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4671 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
|
4672 assert(from_hr != NULL, "sanity"); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4673 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
|
4674 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4675 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
|
4676 assert(to_hr != NULL, "sanity"); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4677 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
|
4678 #endif // ASSERT |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4679 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4680 // 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
|
4681 // 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
|
4682 // 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
|
4683 // image which we know should not be changing. |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4684 _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
|
4685 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4686 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4687 template <class T> |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4688 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
|
4689 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
|
4690 _scanned_klass->record_modified_oops(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4691 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4692 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4693 |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4694 template <G1Barrier barrier, G1Mark do_mark_object> |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4695 template <class T> |
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4696 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
|
4697 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
|
4698 |
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4699 if (oopDesc::is_null(heap_oop)) { |
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4700 return; |
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4701 } |
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4702 |
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4703 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
|
4704 |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4705 assert(_worker_id == _par_scan_state->queue_num(), "sanity"); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4706 |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4707 G1CollectedHeap::in_cset_state_t state = _g1->in_cset_state(obj); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
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20304
diff
changeset
|
4708 |
755930f931e3
8027959: Early reclamation of large objects in G1
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20304
diff
changeset
|
4709 if (state == G1CollectedHeap::InCSet) { |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4710 oop forwardee; |
526 | 4711 if (obj->is_forwarded()) { |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4712 forwardee = obj->forwardee(); |
526 | 4713 } else { |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4714 forwardee = _par_scan_state->copy_to_survivor_space(obj); |
342 | 4715 } |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4716 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
|
4717 oopDesc::encode_store_heap_oop(p, forwardee); |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4718 if (do_mark_object != G1MarkNone && forwardee != obj) { |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4719 // If the object is self-forwarded we don't need to explicitly |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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parents:
4785
diff
changeset
|
4720 // 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
|
4721 mark_forwarded_object(obj, forwardee); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4722 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4723 |
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4724 if (barrier == G1BarrierKlass) { |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4725 do_klass_barrier(p, forwardee); |
342 | 4726 } |
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4727 } else { |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4728 if (state == G1CollectedHeap::IsHumongous) { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4729 _g1->set_humongous_is_live(obj); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4730 } |
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4731 // The object is not in collection set. If we're a root scanning |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4732 // closure during an initial mark pause then attempt to mark the object. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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|
4733 if (do_mark_object == G1MarkFromRoot) { |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4734 mark_object(obj); |
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4735 } |
526 | 4736 } |
4737 | |
17688
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4738 if (barrier == G1BarrierEvac) { |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4739 _par_scan_state->update_rs(_from, p, _worker_id); |
526 | 4740 } |
17636
889068b9a088
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tschatzl
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diff
changeset
|
4741 } |
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
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diff
changeset
|
4742 |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4743 template void G1ParCopyClosure<G1BarrierEvac, G1MarkNone>::do_oop_work(oop* p); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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changeset
|
4744 template void G1ParCopyClosure<G1BarrierEvac, G1MarkNone>::do_oop_work(narrowOop* p); |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
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838
diff
changeset
|
4745 |
342 | 4746 class G1ParEvacuateFollowersClosure : public VoidClosure { |
4747 protected: | |
4748 G1CollectedHeap* _g1h; | |
4749 G1ParScanThreadState* _par_scan_state; | |
4750 RefToScanQueueSet* _queues; | |
4751 ParallelTaskTerminator* _terminator; | |
4752 | |
4753 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } | |
4754 RefToScanQueueSet* queues() { return _queues; } | |
4755 ParallelTaskTerminator* terminator() { return _terminator; } | |
4756 | |
4757 public: | |
4758 G1ParEvacuateFollowersClosure(G1CollectedHeap* g1h, | |
4759 G1ParScanThreadState* par_scan_state, | |
4760 RefToScanQueueSet* queues, | |
4761 ParallelTaskTerminator* terminator) | |
4762 : _g1h(g1h), _par_scan_state(par_scan_state), | |
4763 _queues(queues), _terminator(terminator) {} | |
4764 | |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4765 void do_void(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4766 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
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1861
diff
changeset
|
4767 private: |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4768 inline bool offer_termination(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4769 }; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4770 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4771 bool G1ParEvacuateFollowersClosure::offer_termination() { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4772 G1ParScanThreadState* const pss = par_scan_state(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4773 pss->start_term_time(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4774 const bool res = terminator()->offer_termination(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4775 pss->end_term_time(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4776 return res; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4777 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4778 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4779 void G1ParEvacuateFollowersClosure::do_void() { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4780 G1ParScanThreadState* const pss = par_scan_state(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4781 pss->trim_queue(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4782 do { |
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
4783 pss->steal_and_trim_queue(queues()); |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4784 } while (!offer_termination()); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4785 } |
342 | 4786 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4787 class G1KlassScanClosure : public KlassClosure { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4788 G1ParCopyHelper* _closure; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4789 bool _process_only_dirty; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4790 int _count; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4791 public: |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4792 G1KlassScanClosure(G1ParCopyHelper* closure, bool process_only_dirty) |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4793 : _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
|
4794 void do_klass(Klass* klass) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4795 // 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
|
4796 // 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
|
4797 if (!_process_only_dirty || klass->has_modified_oops()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4798 // 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
|
4799 klass->clear_modified_oops(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4800 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4801 // Tell the closure that this klass is the Klass to scavenge |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4802 // 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
coleenp
parents:
6629
diff
changeset
|
4803 _closure->set_scanned_klass(klass); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4804 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4805 klass->oops_do(_closure); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4806 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4807 _closure->set_scanned_klass(NULL); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4808 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4809 _count++; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4810 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4811 }; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4812 |
342 | 4813 class G1ParTask : public AbstractGangTask { |
4814 protected: | |
4815 G1CollectedHeap* _g1h; | |
4816 RefToScanQueueSet *_queues; | |
4817 ParallelTaskTerminator _terminator; | |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
4818 uint _n_workers; |
342 | 4819 |
4820 Mutex _stats_lock; | |
4821 Mutex* stats_lock() { return &_stats_lock; } | |
4822 | |
4823 public: | |
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
4824 G1ParTask(G1CollectedHeap* g1h, RefToScanQueueSet *task_queues) |
342 | 4825 : AbstractGangTask("G1 collection"), |
4826 _g1h(g1h), | |
4827 _queues(task_queues), | |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4828 _terminator(0, _queues), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4829 _stats_lock(Mutex::leaf, "parallel G1 stats lock", true) |
342 | 4830 {} |
4831 | |
4832 RefToScanQueueSet* queues() { return _queues; } | |
4833 | |
4834 RefToScanQueue *work_queue(int i) { | |
4835 return queues()->queue(i); | |
4836 } | |
4837 | |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4838 ParallelTaskTerminator* terminator() { return &_terminator; } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4839 |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4840 virtual void set_for_termination(int active_workers) { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4841 // This task calls set_n_termination() in par_non_clean_card_iterate_work() |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4842 // in the young space (_par_seq_tasks) in the G1 heap |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4843 // for SequentialSubTasksDone. |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4844 // This task also uses SubTasksDone in SharedHeap and G1CollectedHeap |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4845 // both of which need setting by set_n_termination(). |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4846 _g1h->SharedHeap::set_n_termination(active_workers); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4847 _g1h->set_n_termination(active_workers); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4848 terminator()->reset_for_reuse(active_workers); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4849 _n_workers = active_workers; |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4850 } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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4090
diff
changeset
|
4851 |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4852 // Helps out with CLD processing. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4853 // |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4854 // During InitialMark we need to: |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4855 // 1) Scavenge all CLDs for the young GC. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4856 // 2) Mark all objects directly reachable from strong CLDs. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4857 template <G1Mark do_mark_object> |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4858 class G1CLDClosure : public CLDClosure { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4859 G1ParCopyClosure<G1BarrierNone, do_mark_object>* _oop_closure; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4860 G1ParCopyClosure<G1BarrierKlass, do_mark_object> _oop_in_klass_closure; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4861 G1KlassScanClosure _klass_in_cld_closure; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4862 bool _claim; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4863 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4864 public: |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4865 G1CLDClosure(G1ParCopyClosure<G1BarrierNone, do_mark_object>* oop_closure, |
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|
4866 bool only_young, bool claim) |
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|
4867 : _oop_closure(oop_closure), |
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diff
changeset
|
4868 _oop_in_klass_closure(oop_closure->g1(), |
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8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents:
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diff
changeset
|
4869 oop_closure->pss(), |
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diff
changeset
|
4870 oop_closure->rp()), |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents:
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diff
changeset
|
4871 _klass_in_cld_closure(&_oop_in_klass_closure, only_young), |
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8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
4872 _claim(claim) { |
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diff
changeset
|
4873 |
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diff
changeset
|
4874 } |
2c6ef90f030a
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diff
changeset
|
4875 |
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8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
4876 void do_cld(ClassLoaderData* cld) { |
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8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents:
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diff
changeset
|
4877 cld->oops_do(_oop_closure, &_klass_in_cld_closure, _claim); |
2c6ef90f030a
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diff
changeset
|
4878 } |
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diff
changeset
|
4879 }; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
4880 |
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8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
4881 class G1CodeBlobClosure: public CodeBlobClosure { |
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diff
changeset
|
4882 OopClosure* _f; |
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8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
4883 |
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8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents:
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diff
changeset
|
4884 public: |
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8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents:
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diff
changeset
|
4885 G1CodeBlobClosure(OopClosure* f) : _f(f) {} |
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changeset
|
4886 void do_code_blob(CodeBlob* blob) { |
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diff
changeset
|
4887 nmethod* that = blob->as_nmethod_or_null(); |
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|
4888 if (that != NULL) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents:
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diff
changeset
|
4889 if (!that->test_set_oops_do_mark()) { |
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parents:
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diff
changeset
|
4890 that->oops_do(_f); |
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8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents:
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diff
changeset
|
4891 that->fix_oop_relocations(); |
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diff
changeset
|
4892 } |
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diff
changeset
|
4893 } |
2c6ef90f030a
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diff
changeset
|
4894 } |
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diff
changeset
|
4895 }; |
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diff
changeset
|
4896 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
4897 void work(uint worker_id) { |
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
4898 if (worker_id >= _n_workers) return; // no work needed this round |
1611 | 4899 |
4900 double start_time_ms = os::elapsedTime() * 1000.0; | |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4901 _g1h->g1_policy()->phase_times()->record_gc_worker_start_time(worker_id, start_time_ms); |
1611 | 4902 |
5986
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parents:
5963
diff
changeset
|
4903 { |
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parents:
5963
diff
changeset
|
4904 ResourceMark rm; |
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7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4905 HandleMark hm; |
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parents:
5963
diff
changeset
|
4906 |
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parents:
5963
diff
changeset
|
4907 ReferenceProcessor* rp = _g1h->ref_processor_stw(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4908 |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4909 G1ParScanThreadState pss(_g1h, worker_id, rp); |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4910 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, rp); |
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
4911 |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4912 pss.set_evac_failure_closure(&evac_failure_cl); |
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parents:
5963
diff
changeset
|
4913 |
20278
2c6ef90f030a
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diff
changeset
|
4914 bool only_young = _g1h->g1_policy()->gcs_are_young(); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents:
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diff
changeset
|
4915 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents:
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diff
changeset
|
4916 // Non-IM young GC. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents:
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diff
changeset
|
4917 G1ParCopyClosure<G1BarrierNone, G1MarkNone> scan_only_root_cl(_g1h, &pss, rp); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4918 G1CLDClosure<G1MarkNone> scan_only_cld_cl(&scan_only_root_cl, |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents:
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diff
changeset
|
4919 only_young, // Only process dirty klasses. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4920 false); // No need to claim CLDs. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4921 // IM young GC. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4922 // Strong roots closures. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents:
20274
diff
changeset
|
4923 G1ParCopyClosure<G1BarrierNone, G1MarkFromRoot> scan_mark_root_cl(_g1h, &pss, rp); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4924 G1CLDClosure<G1MarkFromRoot> scan_mark_cld_cl(&scan_mark_root_cl, |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4925 false, // Process all klasses. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4926 true); // Need to claim CLDs. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4927 // Weak roots closures. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4928 G1ParCopyClosure<G1BarrierNone, G1MarkPromotedFromRoot> scan_mark_weak_root_cl(_g1h, &pss, rp); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4929 G1CLDClosure<G1MarkPromotedFromRoot> scan_mark_weak_cld_cl(&scan_mark_weak_root_cl, |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4930 false, // Process all klasses. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4931 true); // Need to claim CLDs. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4932 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4933 G1CodeBlobClosure scan_only_code_cl(&scan_only_root_cl); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4934 G1CodeBlobClosure scan_mark_code_cl(&scan_mark_root_cl); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4935 // IM Weak code roots are handled later. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4936 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4937 OopClosure* strong_root_cl; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4938 OopClosure* weak_root_cl; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4939 CLDClosure* strong_cld_cl; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4940 CLDClosure* weak_cld_cl; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4941 CodeBlobClosure* strong_code_cl; |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4942 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4943 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
|
4944 // We also need to mark copied objects. |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4945 strong_root_cl = &scan_mark_root_cl; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4946 strong_cld_cl = &scan_mark_cld_cl; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4947 strong_code_cl = &scan_mark_code_cl; |
20282
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
stefank
parents:
20279
diff
changeset
|
4948 if (ClassUnloadingWithConcurrentMark) { |
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
stefank
parents:
20279
diff
changeset
|
4949 weak_root_cl = &scan_mark_weak_root_cl; |
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
stefank
parents:
20279
diff
changeset
|
4950 weak_cld_cl = &scan_mark_weak_cld_cl; |
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
stefank
parents:
20279
diff
changeset
|
4951 } else { |
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
stefank
parents:
20279
diff
changeset
|
4952 weak_root_cl = &scan_mark_root_cl; |
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
stefank
parents:
20279
diff
changeset
|
4953 weak_cld_cl = &scan_mark_cld_cl; |
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
stefank
parents:
20279
diff
changeset
|
4954 } |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4955 } else { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4956 strong_root_cl = &scan_only_root_cl; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4957 weak_root_cl = &scan_only_root_cl; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4958 strong_cld_cl = &scan_only_cld_cl; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4959 weak_cld_cl = &scan_only_cld_cl; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4960 strong_code_cl = &scan_only_code_cl; |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4961 } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4962 |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4963 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4964 G1ParPushHeapRSClosure push_heap_rs_cl(_g1h, &pss); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4965 |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4966 pss.start_strong_roots(); |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4967 _g1h->g1_process_roots(strong_root_cl, |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4968 weak_root_cl, |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4969 &push_heap_rs_cl, |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4970 strong_cld_cl, |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4971 weak_cld_cl, |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4972 strong_code_cl, |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4973 worker_id); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4974 |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4975 pss.end_strong_roots(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4976 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4977 { |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4978 double start = os::elapsedTime(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4979 G1ParEvacuateFollowersClosure evac(_g1h, &pss, _queues, &_terminator); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4980 evac.do_void(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4981 double elapsed_ms = (os::elapsedTime()-start)*1000.0; |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4982 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
|
4983 _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
|
4984 _g1h->g1_policy()->phase_times()->record_termination(worker_id, term_ms, pss.term_attempts()); |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4985 } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4986 _g1h->g1_policy()->record_thread_age_table(pss.age_table()); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4987 _g1h->update_surviving_young_words(pss.surviving_young_words()+1); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4988 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4989 if (ParallelGCVerbose) { |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4990 MutexLocker x(stats_lock()); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4991 pss.print_termination_stats(worker_id); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4992 } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4993 |
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
4994 assert(pss.queue_is_empty(), "should be empty"); |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4995 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4996 // Close the inner scope so that the ResourceMark and HandleMark |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4997 // destructors are executed here and are included as part of the |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4998 // "GC Worker Time". |
342 | 4999 } |
5000 | |
1611 | 5001 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
|
5002 _g1h->g1_policy()->phase_times()->record_gc_worker_end_time(worker_id, end_time_ms); |
342 | 5003 } |
5004 }; | |
5005 | |
5006 // *** Common G1 Evacuation Stuff | |
5007 | |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
5008 // This method is run in a GC worker. |
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
5009 |
342 | 5010 void |
5011 G1CollectedHeap:: | |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
5012 g1_process_roots(OopClosure* scan_non_heap_roots, |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5013 OopClosure* scan_non_heap_weak_roots, |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5014 OopsInHeapRegionClosure* scan_rs, |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5015 CLDClosure* scan_strong_clds, |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5016 CLDClosure* scan_weak_clds, |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5017 CodeBlobClosure* scan_strong_code, |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5018 uint worker_i) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5019 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5020 // First scan the shared roots. |
342 | 5021 double ext_roots_start = os::elapsedTime(); |
5022 double closure_app_time_sec = 0.0; | |
5023 | |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5024 bool during_im = _g1h->g1_policy()->during_initial_mark_pause(); |
20282
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
stefank
parents:
20279
diff
changeset
|
5025 bool trace_metadata = during_im && ClassUnloadingWithConcurrentMark; |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5026 |
342 | 5027 BufferingOopClosure buf_scan_non_heap_roots(scan_non_heap_roots); |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5028 BufferingOopClosure buf_scan_non_heap_weak_roots(scan_non_heap_weak_roots); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5029 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5030 process_roots(false, // no scoping; this is parallel code |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5031 SharedHeap::SO_None, |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5032 &buf_scan_non_heap_roots, |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5033 &buf_scan_non_heap_weak_roots, |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5034 scan_strong_clds, |
20282
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
stefank
parents:
20279
diff
changeset
|
5035 // Unloading Initial Marks handle the weak CLDs separately. |
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
stefank
parents:
20279
diff
changeset
|
5036 (trace_metadata ? NULL : scan_weak_clds), |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5037 scan_strong_code); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
5038 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5039 // 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
|
5040 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
|
5041 // We need to treat the discovered reference lists of the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5042 // concurrent mark ref processor as roots and keep entries |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5043 // (which are added by the marking threads) on them live |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5044 // until they can be processed at the end of marking. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5045 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
|
5046 } |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
5047 |
20282
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
stefank
parents:
20279
diff
changeset
|
5048 if (trace_metadata) { |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5049 // Barrier to make sure all workers passed |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5050 // the strong CLD and strong nmethods phases. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5051 active_strong_roots_scope()->wait_until_all_workers_done_with_threads(n_par_threads()); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5052 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5053 // Now take the complement of the strong CLDs. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5054 ClassLoaderDataGraph::roots_cld_do(NULL, scan_weak_clds); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5055 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5056 |
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
5057 // Finish up any enqueued closure apps (attributed as object copy time). |
342 | 5058 buf_scan_non_heap_roots.done(); |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5059 buf_scan_non_heap_weak_roots.done(); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5060 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5061 double obj_copy_time_sec = buf_scan_non_heap_roots.closure_app_seconds() |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5062 + buf_scan_non_heap_weak_roots.closure_app_seconds(); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5063 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5064 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
|
5065 |
342 | 5066 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
|
5067 ((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
|
5068 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5069 g1_policy()->phase_times()->record_ext_root_scan_time(worker_i, ext_root_time_ms); |
342 | 5070 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5071 // 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
|
5072 // 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
|
5073 // 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
|
5074 double satb_filtering_ms = 0.0; |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5075 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
|
5076 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
|
5077 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
|
5078 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5079 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
|
5080 |
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
5081 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
|
5082 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5083 } |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5084 g1_policy()->phase_times()->record_satb_filtering_time(worker_i, satb_filtering_ms); |
342 | 5085 |
5086 // Now scan the complement of the collection set. | |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5087 MarkingCodeBlobClosure scavenge_cs_nmethods(scan_non_heap_weak_roots, CodeBlobToOopClosure::FixRelocations); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5088 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5089 g1_rem_set()->oops_into_collection_set_do(scan_rs, &scavenge_cs_nmethods, worker_i); |
20256
b0b97602393a
8033923: Use BufferingOopClosure for G1 code root scanning
stefank
parents:
20254
diff
changeset
|
5090 |
342 | 5091 _process_strong_tasks->all_tasks_completed(); |
5092 } | |
5093 | |
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5094 class G1StringSymbolTableUnlinkTask : public AbstractGangTask { |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5095 private: |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5096 BoolObjectClosure* _is_alive; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5097 int _initial_string_table_size; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5098 int _initial_symbol_table_size; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5099 |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5100 bool _process_strings; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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parents:
13400
diff
changeset
|
5101 int _strings_processed; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5102 int _strings_removed; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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parents:
13400
diff
changeset
|
5103 |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
5104 bool _process_symbols; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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13400
diff
changeset
|
5105 int _symbols_processed; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5106 int _symbols_removed; |
17652
0eb64cfc0b76
8033443: Test8000311 fails after latest changes to parallelize string and symbol table unlink
tschatzl
parents:
17651
diff
changeset
|
5107 |
0eb64cfc0b76
8033443: Test8000311 fails after latest changes to parallelize string and symbol table unlink
tschatzl
parents:
17651
diff
changeset
|
5108 bool _do_in_parallel; |
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
5109 public: |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
5110 G1StringSymbolTableUnlinkTask(BoolObjectClosure* is_alive, bool process_strings, bool process_symbols) : |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5111 AbstractGangTask("String/Symbol Unlinking"), |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
5112 _is_alive(is_alive), |
17652
0eb64cfc0b76
8033443: Test8000311 fails after latest changes to parallelize string and symbol table unlink
tschatzl
parents:
17651
diff
changeset
|
5113 _do_in_parallel(G1CollectedHeap::use_parallel_gc_threads()), |
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
5114 _process_strings(process_strings), _strings_processed(0), _strings_removed(0), |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
5115 _process_symbols(process_symbols), _symbols_processed(0), _symbols_removed(0) { |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
5116 |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
5117 _initial_string_table_size = StringTable::the_table()->table_size(); |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
5118 _initial_symbol_table_size = SymbolTable::the_table()->table_size(); |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
5119 if (process_strings) { |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
5120 StringTable::clear_parallel_claimed_index(); |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
5121 } |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
5122 if (process_symbols) { |
5a32d2a3cc1e
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5123 SymbolTable::clear_parallel_claimed_index(); |
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5124 } |
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5125 } |
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5126 |
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5127 ~G1StringSymbolTableUnlinkTask() { |
17652
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5128 guarantee(!_process_strings || !_do_in_parallel || StringTable::parallel_claimed_index() >= _initial_string_table_size, |
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5129 err_msg("claim value "INT32_FORMAT" after unlink less than initial string table size "INT32_FORMAT, |
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5130 StringTable::parallel_claimed_index(), _initial_string_table_size)); |
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5131 guarantee(!_process_symbols || !_do_in_parallel || SymbolTable::parallel_claimed_index() >= _initial_symbol_table_size, |
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5132 err_msg("claim value "INT32_FORMAT" after unlink less than initial symbol table size "INT32_FORMAT, |
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5133 SymbolTable::parallel_claimed_index(), _initial_symbol_table_size)); |
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5134 |
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5135 if (G1TraceStringSymbolTableScrubbing) { |
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5136 gclog_or_tty->print_cr("Cleaned string and symbol table, " |
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5137 "strings: "SIZE_FORMAT" processed, "SIZE_FORMAT" removed, " |
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5138 "symbols: "SIZE_FORMAT" processed, "SIZE_FORMAT" removed", |
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5139 strings_processed(), strings_removed(), |
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5140 symbols_processed(), symbols_removed()); |
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5141 } |
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5142 } |
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5143 |
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5144 void work(uint worker_id) { |
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5145 if (_do_in_parallel) { |
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5146 int strings_processed = 0; |
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5147 int strings_removed = 0; |
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5148 int symbols_processed = 0; |
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5149 int symbols_removed = 0; |
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5150 if (_process_strings) { |
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5151 StringTable::possibly_parallel_unlink(_is_alive, &strings_processed, &strings_removed); |
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5152 Atomic::add(strings_processed, &_strings_processed); |
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5153 Atomic::add(strings_removed, &_strings_removed); |
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5154 } |
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5155 if (_process_symbols) { |
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5156 SymbolTable::possibly_parallel_unlink(&symbols_processed, &symbols_removed); |
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5157 Atomic::add(symbols_processed, &_symbols_processed); |
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5158 Atomic::add(symbols_removed, &_symbols_removed); |
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5159 } |
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5160 } else { |
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|
5161 if (_process_strings) { |
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5162 StringTable::unlink(_is_alive, &_strings_processed, &_strings_removed); |
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5163 } |
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5164 if (_process_symbols) { |
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|
5165 SymbolTable::unlink(&_symbols_processed, &_symbols_removed); |
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5166 } |
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|
5167 } |
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|
5168 } |
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5169 |
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|
5170 size_t strings_processed() const { return (size_t)_strings_processed; } |
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5171 size_t strings_removed() const { return (size_t)_strings_removed; } |
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5172 |
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5173 size_t symbols_processed() const { return (size_t)_symbols_processed; } |
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5174 size_t symbols_removed() const { return (size_t)_symbols_removed; } |
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5175 }; |
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5176 |
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5177 class G1CodeCacheUnloadingTask VALUE_OBJ_CLASS_SPEC { |
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5178 private: |
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5179 static Monitor* _lock; |
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5180 |
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5181 BoolObjectClosure* const _is_alive; |
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5182 const bool _unloading_occurred; |
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5183 const uint _num_workers; |
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5184 |
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5185 // Variables used to claim nmethods. |
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|
5186 nmethod* _first_nmethod; |
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|
5187 volatile nmethod* _claimed_nmethod; |
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5188 |
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5189 // The list of nmethods that need to be processed by the second pass. |
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5190 volatile nmethod* _postponed_list; |
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5191 volatile uint _num_entered_barrier; |
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|
5192 |
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|
5193 public: |
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|
5194 G1CodeCacheUnloadingTask(uint num_workers, BoolObjectClosure* is_alive, bool unloading_occurred) : |
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|
5195 _is_alive(is_alive), |
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5196 _unloading_occurred(unloading_occurred), |
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|
5197 _num_workers(num_workers), |
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|
5198 _first_nmethod(NULL), |
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|
5199 _claimed_nmethod(NULL), |
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|
5200 _postponed_list(NULL), |
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|
5201 _num_entered_barrier(0) |
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5202 { |
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|
5203 nmethod::increase_unloading_clock(); |
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5204 _first_nmethod = CodeCache::alive_nmethod(CodeCache::first()); |
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5205 _claimed_nmethod = (volatile nmethod*)_first_nmethod; |
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|
5206 } |
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|
5207 |
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|
5208 ~G1CodeCacheUnloadingTask() { |
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|
5209 CodeCache::verify_clean_inline_caches(); |
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|
5210 |
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|
5211 CodeCache::set_needs_cache_clean(false); |
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|
5212 guarantee(CodeCache::scavenge_root_nmethods() == NULL, "Must be"); |
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5213 |
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|
5214 CodeCache::verify_icholder_relocations(); |
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|
5215 } |
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|
5216 |
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|
5217 private: |
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|
5218 void add_to_postponed_list(nmethod* nm) { |
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|
5219 nmethod* old; |
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|
5220 do { |
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|
5221 old = (nmethod*)_postponed_list; |
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|
5222 nm->set_unloading_next(old); |
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5223 } while ((nmethod*)Atomic::cmpxchg_ptr(nm, &_postponed_list, old) != old); |
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5224 } |
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|
5225 |
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|
5226 void clean_nmethod(nmethod* nm) { |
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5227 bool postponed = nm->do_unloading_parallel(_is_alive, _unloading_occurred); |
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|
5228 |
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|
5229 if (postponed) { |
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|
5230 // This nmethod referred to an nmethod that has not been cleaned/unloaded yet. |
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|
5231 add_to_postponed_list(nm); |
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|
5232 } |
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|
5233 |
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|
5234 // Mark that this thread has been cleaned/unloaded. |
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5235 // After this call, it will be safe to ask if this nmethod was unloaded or not. |
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|
5236 nm->set_unloading_clock(nmethod::global_unloading_clock()); |
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|
5237 } |
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|
5238 |
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5239 void clean_nmethod_postponed(nmethod* nm) { |
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|
5240 nm->do_unloading_parallel_postponed(_is_alive, _unloading_occurred); |
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5241 } |
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|
5242 |
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|
5243 static const int MaxClaimNmethods = 16; |
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|
5244 |
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|
5245 void claim_nmethods(nmethod** claimed_nmethods, int *num_claimed_nmethods) { |
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|
5246 nmethod* first; |
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|
5247 nmethod* last; |
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5248 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5249 do { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5250 *num_claimed_nmethods = 0; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5251 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5252 first = last = (nmethod*)_claimed_nmethod; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5253 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5254 if (first != NULL) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5255 for (int i = 0; i < MaxClaimNmethods; i++) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5256 last = CodeCache::alive_nmethod(CodeCache::next(last)); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5257 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5258 if (last == NULL) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5259 break; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5260 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5261 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5262 claimed_nmethods[i] = last; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5263 (*num_claimed_nmethods)++; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5264 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5265 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5266 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5267 } while ((nmethod*)Atomic::cmpxchg_ptr(last, &_claimed_nmethod, first) != first); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5268 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5269 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5270 nmethod* claim_postponed_nmethod() { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5271 nmethod* claim; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5272 nmethod* next; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5273 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5274 do { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5275 claim = (nmethod*)_postponed_list; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5276 if (claim == NULL) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5277 return NULL; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5278 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5279 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5280 next = claim->unloading_next(); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5281 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5282 } while ((nmethod*)Atomic::cmpxchg_ptr(next, &_postponed_list, claim) != claim); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5283 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5284 return claim; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5285 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5286 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5287 public: |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5288 // Mark that we're done with the first pass of nmethod cleaning. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5289 void barrier_mark(uint worker_id) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5290 MonitorLockerEx ml(_lock, Mutex::_no_safepoint_check_flag); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5291 _num_entered_barrier++; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5292 if (_num_entered_barrier == _num_workers) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5293 ml.notify_all(); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5294 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5295 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5296 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5297 // See if we have to wait for the other workers to |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5298 // finish their first-pass nmethod cleaning work. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5299 void barrier_wait(uint worker_id) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5300 if (_num_entered_barrier < _num_workers) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5301 MonitorLockerEx ml(_lock, Mutex::_no_safepoint_check_flag); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5302 while (_num_entered_barrier < _num_workers) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5303 ml.wait(Mutex::_no_safepoint_check_flag, 0, false); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5304 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5305 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5306 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5307 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5308 // Cleaning and unloading of nmethods. Some work has to be postponed |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5309 // to the second pass, when we know which nmethods survive. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5310 void work_first_pass(uint worker_id) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5311 // The first nmethods is claimed by the first worker. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5312 if (worker_id == 0 && _first_nmethod != NULL) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5313 clean_nmethod(_first_nmethod); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5314 _first_nmethod = NULL; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5315 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5316 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5317 int num_claimed_nmethods; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5318 nmethod* claimed_nmethods[MaxClaimNmethods]; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5319 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5320 while (true) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5321 claim_nmethods(claimed_nmethods, &num_claimed_nmethods); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5322 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5323 if (num_claimed_nmethods == 0) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5324 break; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5325 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5326 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5327 for (int i = 0; i < num_claimed_nmethods; i++) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5328 clean_nmethod(claimed_nmethods[i]); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5329 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5330 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5331 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5332 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5333 void work_second_pass(uint worker_id) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5334 nmethod* nm; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5335 // Take care of postponed nmethods. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5336 while ((nm = claim_postponed_nmethod()) != NULL) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5337 clean_nmethod_postponed(nm); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5338 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5339 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5340 }; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5341 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5342 Monitor* G1CodeCacheUnloadingTask::_lock = new Monitor(Mutex::leaf, "Code Cache Unload lock"); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5343 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5344 class G1KlassCleaningTask : public StackObj { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5345 BoolObjectClosure* _is_alive; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5346 volatile jint _clean_klass_tree_claimed; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5347 ClassLoaderDataGraphKlassIteratorAtomic _klass_iterator; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5348 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5349 public: |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5350 G1KlassCleaningTask(BoolObjectClosure* is_alive) : |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5351 _is_alive(is_alive), |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5352 _clean_klass_tree_claimed(0), |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5353 _klass_iterator() { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5354 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5355 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5356 private: |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5357 bool claim_clean_klass_tree_task() { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5358 if (_clean_klass_tree_claimed) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5359 return false; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5360 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5361 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5362 return Atomic::cmpxchg(1, (jint*)&_clean_klass_tree_claimed, 0) == 0; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5363 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5364 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5365 InstanceKlass* claim_next_klass() { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5366 Klass* klass; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5367 do { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5368 klass =_klass_iterator.next_klass(); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5369 } while (klass != NULL && !klass->oop_is_instance()); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5370 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5371 return (InstanceKlass*)klass; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5372 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5373 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5374 public: |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5375 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5376 void clean_klass(InstanceKlass* ik) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5377 ik->clean_implementors_list(_is_alive); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5378 ik->clean_method_data(_is_alive); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5379 |
2c6ef90f030a
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5380 // G1 specific cleanup work that has |
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5381 // been moved here to be done in parallel. |
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|
5382 ik->clean_dependent_nmethods(); |
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|
5383 } |
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|
5384 |
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|
5385 void work() { |
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|
5386 ResourceMark rm; |
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|
5387 |
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|
5388 // One worker will clean the subklass/sibling klass tree. |
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5389 if (claim_clean_klass_tree_task()) { |
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|
5390 Klass::clean_subklass_tree(_is_alive); |
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|
5391 } |
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|
5392 |
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|
5393 // All workers will help cleaning the classes, |
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|
5394 InstanceKlass* klass; |
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|
5395 while ((klass = claim_next_klass()) != NULL) { |
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|
5396 clean_klass(klass); |
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|
5397 } |
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|
5398 } |
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|
5399 }; |
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|
5400 |
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|
5401 // To minimize the remark pause times, the tasks below are done in parallel. |
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5402 class G1ParallelCleaningTask : public AbstractGangTask { |
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|
5403 private: |
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|
5404 G1StringSymbolTableUnlinkTask _string_symbol_task; |
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5405 G1CodeCacheUnloadingTask _code_cache_task; |
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5406 G1KlassCleaningTask _klass_cleaning_task; |
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5407 |
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|
5408 public: |
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|
5409 // The constructor is run in the VMThread. |
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5410 G1ParallelCleaningTask(BoolObjectClosure* is_alive, bool process_strings, bool process_symbols, uint num_workers, bool unloading_occurred) : |
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5411 AbstractGangTask("Parallel Cleaning"), |
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5412 _string_symbol_task(is_alive, process_strings, process_symbols), |
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5413 _code_cache_task(num_workers, is_alive, unloading_occurred), |
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5414 _klass_cleaning_task(is_alive) { |
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|
5415 } |
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|
5416 |
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|
5417 // The parallel work done by all worker threads. |
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|
5418 void work(uint worker_id) { |
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|
5419 // Do first pass of code cache cleaning. |
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|
5420 _code_cache_task.work_first_pass(worker_id); |
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5421 |
20279 | 5422 // Let the threads mark that the first pass is done. |
20278
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5423 _code_cache_task.barrier_mark(worker_id); |
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5424 |
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|
5425 // Clean the Strings and Symbols. |
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|
5426 _string_symbol_task.work(worker_id); |
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|
5427 |
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|
5428 // Wait for all workers to finish the first code cache cleaning pass. |
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|
5429 _code_cache_task.barrier_wait(worker_id); |
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|
5430 |
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|
5431 // Do the second code cache cleaning work, which realize on |
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|
5432 // the liveness information gathered during the first pass. |
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|
5433 _code_cache_task.work_second_pass(worker_id); |
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|
5434 |
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|
5435 // Clean all klasses that were not unloaded. |
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|
5436 _klass_cleaning_task.work(); |
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|
5437 } |
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|
5438 }; |
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|
5439 |
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|
5440 |
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|
5441 void G1CollectedHeap::parallel_cleaning(BoolObjectClosure* is_alive, |
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|
5442 bool process_strings, |
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|
5443 bool process_symbols, |
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|
5444 bool class_unloading_occurred) { |
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|
5445 uint n_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
20278
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|
5446 workers()->active_workers() : 1); |
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|
5447 |
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|
5448 G1ParallelCleaningTask g1_unlink_task(is_alive, process_strings, process_symbols, |
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|
5449 n_workers, class_unloading_occurred); |
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|
5450 if (G1CollectedHeap::use_parallel_gc_threads()) { |
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|
5451 set_par_threads(n_workers); |
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|
5452 workers()->run_task(&g1_unlink_task); |
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|
5453 set_par_threads(0); |
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|
5454 } else { |
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|
5455 g1_unlink_task.work(0); |
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|
5456 } |
20278
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|
5457 } |
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|
5458 |
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|
5459 void G1CollectedHeap::unlink_string_and_symbol_table(BoolObjectClosure* is_alive, |
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|
5460 bool process_strings, bool process_symbols) { |
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|
5461 { |
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changeset
|
5462 uint n_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
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|
5463 _g1h->workers()->active_workers() : 1); |
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|
5464 G1StringSymbolTableUnlinkTask g1_unlink_task(is_alive, process_strings, process_symbols); |
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|
5465 if (G1CollectedHeap::use_parallel_gc_threads()) { |
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|
5466 set_par_threads(n_workers); |
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changeset
|
5467 workers()->run_task(&g1_unlink_task); |
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|
5468 set_par_threads(0); |
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|
5469 } else { |
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|
5470 g1_unlink_task.work(0); |
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|
5471 } |
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diff
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|
5472 } |
17764 | 5473 |
5474 if (G1StringDedup::is_enabled()) { | |
5475 G1StringDedup::unlink(is_alive); | |
5476 } | |
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|
5477 } |
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|
5478 |
20216
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|
5479 class G1RedirtyLoggedCardsTask : public AbstractGangTask { |
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|
5480 private: |
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diff
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|
5481 DirtyCardQueueSet* _queue; |
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diff
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|
5482 public: |
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|
5483 G1RedirtyLoggedCardsTask(DirtyCardQueueSet* queue) : AbstractGangTask("Redirty Cards"), _queue(queue) { } |
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|
5484 |
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|
5485 virtual void work(uint worker_id) { |
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|
5486 double start_time = os::elapsedTime(); |
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|
5487 |
20217
6b52700a896b
8040002: Clean up code and code duplication in re-diryting cards for verification
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diff
changeset
|
5488 RedirtyLoggedCardTableEntryClosure cl; |
20216
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|
5489 if (G1CollectedHeap::heap()->use_parallel_gc_threads()) { |
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changeset
|
5490 _queue->par_apply_closure_to_all_completed_buffers(&cl); |
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|
5491 } else { |
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|
5492 _queue->apply_closure_to_all_completed_buffers(&cl); |
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|
5493 } |
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|
5494 |
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changeset
|
5495 G1GCPhaseTimes* timer = G1CollectedHeap::heap()->g1_policy()->phase_times(); |
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|
5496 timer->record_redirty_logged_cards_time_ms(worker_id, (os::elapsedTime() - start_time) * 1000.0); |
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changeset
|
5497 timer->record_redirty_logged_cards_processed_cards(worker_id, cl.num_processed()); |
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|
5498 } |
17756
a07bea31ef35
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diff
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|
5499 }; |
a07bea31ef35
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|
5500 |
a07bea31ef35
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diff
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|
5501 void G1CollectedHeap::redirty_logged_cards() { |
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tschatzl
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diff
changeset
|
5502 guarantee(G1DeferredRSUpdate, "Must only be called when using deferred RS updates."); |
a07bea31ef35
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tschatzl
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diff
changeset
|
5503 double redirty_logged_cards_start = os::elapsedTime(); |
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|
5504 |
20216
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|
5505 uint n_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
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|
5506 _g1h->workers()->active_workers() : 1); |
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changeset
|
5507 |
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5508 G1RedirtyLoggedCardsTask redirty_task(&dirty_card_queue_set()); |
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5509 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
|
5510 if (use_parallel_gc_threads()) { |
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5511 set_par_threads(n_workers); |
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5512 workers()->run_task(&redirty_task); |
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5513 set_par_threads(0); |
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5514 } else { |
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5515 redirty_task.work(0); |
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5516 } |
17756
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5517 |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5518 DirtyCardQueueSet& dcq = JavaThread::dirty_card_queue_set(); |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5519 dcq.merge_bufferlists(&dirty_card_queue_set()); |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5520 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
|
5521 |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5522 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
|
5523 } |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5524 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5525 // Weak Reference Processing support |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5526 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5527 // An always "is_alive" closure that is used to preserve referents. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5528 // 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
|
5529 // of referent objects that are pointed to by reference objects |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5530 // discovered by the CM ref processor. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5531 class G1AlwaysAliveClosure: public BoolObjectClosure { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5532 G1CollectedHeap* _g1; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5533 public: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5534 G1AlwaysAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5535 bool do_object_b(oop p) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5536 if (p != NULL) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5537 return true; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5538 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5539 return false; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5540 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5541 }; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5542 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5543 bool G1STWIsAliveClosure::do_object_b(oop p) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5544 // An object is reachable if it is outside the collection set, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5545 // or is inside and copied. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5546 return !_g1->obj_in_cs(p) || p->is_forwarded(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5547 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5548 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5549 // Non Copying Keep Alive closure |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5550 class G1KeepAliveClosure: public OopClosure { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5551 G1CollectedHeap* _g1; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5552 public: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5553 G1KeepAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5554 void do_oop(narrowOop* p) { guarantee(false, "Not needed"); } |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5555 void do_oop(oop* p) { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5556 oop obj = *p; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5557 |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5558 G1CollectedHeap::in_cset_state_t cset_state = _g1->in_cset_state(obj); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5559 if (obj == NULL || cset_state == G1CollectedHeap::InNeither) { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5560 return; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5561 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5562 if (cset_state == G1CollectedHeap::InCSet) { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5563 assert( obj->is_forwarded(), "invariant" ); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5564 *p = obj->forwardee(); |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5565 } else { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5566 assert(!obj->is_forwarded(), "invariant" ); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5567 assert(cset_state == G1CollectedHeap::IsHumongous, |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5568 err_msg("Only allowed InCSet state is IsHumongous, but is %d", cset_state)); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5569 _g1->set_humongous_is_live(obj); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5570 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5571 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5572 }; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5573 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5574 // Copying Keep Alive closure - can be called from both |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5575 // serial and parallel code as long as different worker |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5576 // threads utilize different G1ParScanThreadState instances |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5577 // and different queues. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5578 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5579 class G1CopyingKeepAliveClosure: public OopClosure { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5580 G1CollectedHeap* _g1h; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5581 OopClosure* _copy_non_heap_obj_cl; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5582 G1ParScanThreadState* _par_scan_state; |
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 public: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5585 G1CopyingKeepAliveClosure(G1CollectedHeap* g1h, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5586 OopClosure* non_heap_obj_cl, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5587 G1ParScanThreadState* pss): |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5588 _g1h(g1h), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5589 _copy_non_heap_obj_cl(non_heap_obj_cl), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5590 _par_scan_state(pss) |
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 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5593 virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5594 virtual void do_oop( oop* p) { do_oop_work(p); } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5595 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5596 template <class T> void do_oop_work(T* p) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5597 oop obj = oopDesc::load_decode_heap_oop(p); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5598 |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5599 if (_g1h->is_in_cset_or_humongous(obj)) { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5600 // If the referent object has been forwarded (either copied |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5601 // to a new location or to itself in the event of an |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5602 // evacuation failure) then we need to update the reference |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5603 // field and, if both reference and referent are in the G1 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5604 // heap, update the RSet for the referent. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5605 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5606 // If the referent has not been forwarded then we have to keep |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5607 // it alive by policy. Therefore we have copy the referent. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5608 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5609 // If the reference field is in the G1 heap then we can push |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5610 // on the PSS queue. When the queue is drained (after each |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5611 // phase of reference processing) the object and it's followers |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5612 // will be copied, the reference field set to point to the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5613 // new location, and the RSet updated. Otherwise we need to |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5614 // use the the non-heap or metadata closures directly to copy |
10405 | 5615 // the referent object and update the pointer, while avoiding |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5616 // updating the RSet. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5617 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5618 if (_g1h->is_in_g1_reserved(p)) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5619 _par_scan_state->push_on_queue(p); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5620 } else { |
17935
7384f6a12fc1
8038212: Method::is_valid_method() check has performance regression impact for stackwalking
coleenp
parents:
17866
diff
changeset
|
5621 assert(!Metaspace::contains((const void*)p), |
20270
b7d24d2bc8be
8047323: Remove unused _copy_metadata_obj_cl in G1CopyingKeepAliveClosure
stefank
parents:
20257
diff
changeset
|
5622 err_msg("Unexpectedly found a pointer from metadata: " |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5623 PTR_FORMAT, p)); |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5624 _copy_non_heap_obj_cl->do_oop(p); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5625 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5626 } |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5627 } |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5628 }; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5629 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5630 // Serial drain queue closure. Called as the 'complete_gc' |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5631 // closure for each discovered list in some of the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5632 // reference processing phases. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5633 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5634 class G1STWDrainQueueClosure: public VoidClosure { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5635 protected: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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|
5636 G1CollectedHeap* _g1h; |
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parents:
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diff
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|
5637 G1ParScanThreadState* _par_scan_state; |
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parents:
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|
5638 |
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6484982: G1: process references during evacuation pauses
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parents:
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diff
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|
5639 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } |
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6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5640 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5641 public: |
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parents:
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diff
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|
5642 G1STWDrainQueueClosure(G1CollectedHeap* g1h, G1ParScanThreadState* pss) : |
4dfb2df418f2
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parents:
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changeset
|
5643 _g1h(g1h), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5644 _par_scan_state(pss) |
4dfb2df418f2
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parents:
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diff
changeset
|
5645 { } |
4dfb2df418f2
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parents:
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diff
changeset
|
5646 |
4dfb2df418f2
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parents:
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diff
changeset
|
5647 void do_void() { |
4dfb2df418f2
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parents:
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diff
changeset
|
5648 G1ParScanThreadState* const pss = par_scan_state(); |
4dfb2df418f2
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parents:
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diff
changeset
|
5649 pss->trim_queue(); |
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parents:
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diff
changeset
|
5650 } |
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parents:
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diff
changeset
|
5651 }; |
4dfb2df418f2
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parents:
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diff
changeset
|
5652 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5653 // Parallel Reference Processing closures |
4dfb2df418f2
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parents:
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diff
changeset
|
5654 |
4dfb2df418f2
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parents:
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diff
changeset
|
5655 // Implementation of AbstractRefProcTaskExecutor for parallel reference |
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parents:
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diff
changeset
|
5656 // processing during G1 evacuation pauses. |
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parents:
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diff
changeset
|
5657 |
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parents:
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diff
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|
5658 class G1STWRefProcTaskExecutor: public AbstractRefProcTaskExecutor { |
4dfb2df418f2
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parents:
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diff
changeset
|
5659 private: |
4dfb2df418f2
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parents:
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diff
changeset
|
5660 G1CollectedHeap* _g1h; |
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parents:
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diff
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|
5661 RefToScanQueueSet* _queues; |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
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|
5662 FlexibleWorkGang* _workers; |
3979
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parents:
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|
5663 int _active_workers; |
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parents:
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diff
changeset
|
5664 |
4dfb2df418f2
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parents:
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diff
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|
5665 public: |
4dfb2df418f2
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diff
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|
5666 G1STWRefProcTaskExecutor(G1CollectedHeap* g1h, |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
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|
5667 FlexibleWorkGang* workers, |
3979
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parents:
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diff
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|
5668 RefToScanQueueSet *task_queues, |
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parents:
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diff
changeset
|
5669 int n_workers) : |
4dfb2df418f2
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parents:
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diff
changeset
|
5670 _g1h(g1h), |
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parents:
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diff
changeset
|
5671 _queues(task_queues), |
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parents:
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diff
changeset
|
5672 _workers(workers), |
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parents:
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diff
changeset
|
5673 _active_workers(n_workers) |
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parents:
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diff
changeset
|
5674 { |
4dfb2df418f2
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parents:
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diff
changeset
|
5675 assert(n_workers > 0, "shouldn't call this otherwise"); |
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parents:
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diff
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|
5676 } |
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parents:
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diff
changeset
|
5677 |
4dfb2df418f2
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parents:
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diff
changeset
|
5678 // Executes the given task using concurrent marking worker threads. |
4dfb2df418f2
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parents:
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diff
changeset
|
5679 virtual void execute(ProcessTask& task); |
4dfb2df418f2
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parents:
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diff
changeset
|
5680 virtual void execute(EnqueueTask& task); |
4dfb2df418f2
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parents:
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diff
changeset
|
5681 }; |
4dfb2df418f2
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parents:
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diff
changeset
|
5682 |
4dfb2df418f2
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parents:
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diff
changeset
|
5683 // Gang task for possibly parallel reference processing |
4dfb2df418f2
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parents:
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diff
changeset
|
5684 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5685 class G1STWRefProcTaskProxy: public AbstractGangTask { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
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|
5686 typedef AbstractRefProcTaskExecutor::ProcessTask ProcessTask; |
4dfb2df418f2
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parents:
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diff
changeset
|
5687 ProcessTask& _proc_task; |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5688 G1CollectedHeap* _g1h; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5689 RefToScanQueueSet *_task_queues; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5690 ParallelTaskTerminator* _terminator; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5691 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5692 public: |
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
5693 G1STWRefProcTaskProxy(ProcessTask& proc_task, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5694 G1CollectedHeap* g1h, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5695 RefToScanQueueSet *task_queues, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5696 ParallelTaskTerminator* terminator) : |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5697 AbstractGangTask("Process reference objects in parallel"), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5698 _proc_task(proc_task), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5699 _g1h(g1h), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5700 _task_queues(task_queues), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5701 _terminator(terminator) |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5702 {} |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5703 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5704 virtual void work(uint worker_id) { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5705 // The reference processing task executed by a single worker. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5706 ResourceMark rm; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5707 HandleMark hm; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5708 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5709 G1STWIsAliveClosure is_alive(_g1h); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5710 |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5711 G1ParScanThreadState pss(_g1h, worker_id, NULL); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5712 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
5713 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5714 pss.set_evac_failure_closure(&evac_failure_cl); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5715 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5716 G1ParScanExtRootClosure only_copy_non_heap_cl(_g1h, &pss, NULL); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5717 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5718 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5719 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5720 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5721 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5722 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5723 // We also need to mark copied objects. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5724 copy_non_heap_cl = ©_mark_non_heap_cl; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5725 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5726 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5727 // Keep alive closure. |
20270
b7d24d2bc8be
8047323: Remove unused _copy_metadata_obj_cl in G1CopyingKeepAliveClosure
stefank
parents:
20257
diff
changeset
|
5728 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, &pss); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5729 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5730 // Complete GC closure |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5731 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _task_queues, _terminator); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5732 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5733 // Call the reference processing task's work routine. |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5734 _proc_task.work(worker_id, is_alive, keep_alive, drain_queue); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5735 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5736 // Note we cannot assert that the refs array is empty here as not all |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5737 // of the processing tasks (specifically phase2 - pp2_work) execute |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5738 // the complete_gc closure (which ordinarily would drain the queue) so |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5739 // the queue may not be empty. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5740 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5741 }; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5742 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5743 // Driver routine for parallel reference processing. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5744 // Creates an instance of the ref processing gang |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5745 // task and has the worker threads execute it. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5746 void G1STWRefProcTaskExecutor::execute(ProcessTask& proc_task) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5747 assert(_workers != NULL, "Need parallel worker threads."); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5748 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5749 ParallelTaskTerminator terminator(_active_workers, _queues); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5750 G1STWRefProcTaskProxy proc_task_proxy(proc_task, _g1h, _queues, &terminator); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5751 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5752 _g1h->set_par_threads(_active_workers); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5753 _workers->run_task(&proc_task_proxy); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5754 _g1h->set_par_threads(0); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5755 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5756 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5757 // Gang task for parallel reference enqueueing. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5758 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5759 class G1STWRefEnqueueTaskProxy: public AbstractGangTask { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5760 typedef AbstractRefProcTaskExecutor::EnqueueTask EnqueueTask; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5761 EnqueueTask& _enq_task; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5762 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5763 public: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5764 G1STWRefEnqueueTaskProxy(EnqueueTask& enq_task) : |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5765 AbstractGangTask("Enqueue reference objects in parallel"), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5766 _enq_task(enq_task) |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5767 { } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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|
5768 |
4728
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|
5769 virtual void work(uint worker_id) { |
441e946dc1af
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|
5770 _enq_task.work(worker_id); |
3979
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|
5771 } |
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diff
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|
5772 }; |
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diff
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|
5773 |
10405 | 5774 // Driver routine for parallel reference enqueueing. |
3979
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parents:
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diff
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|
5775 // Creates an instance of the ref enqueueing gang |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5776 // task and has the worker threads execute it. |
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parents:
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diff
changeset
|
5777 |
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diff
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|
5778 void G1STWRefProcTaskExecutor::execute(EnqueueTask& enq_task) { |
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parents:
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diff
changeset
|
5779 assert(_workers != NULL, "Need parallel worker threads."); |
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diff
changeset
|
5780 |
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diff
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|
5781 G1STWRefEnqueueTaskProxy enq_task_proxy(enq_task); |
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|
5782 |
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diff
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|
5783 _g1h->set_par_threads(_active_workers); |
4dfb2df418f2
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|
5784 _workers->run_task(&enq_task_proxy); |
4dfb2df418f2
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|
5785 _g1h->set_par_threads(0); |
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|
5786 } |
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parents:
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diff
changeset
|
5787 |
4dfb2df418f2
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parents:
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diff
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|
5788 // End of weak reference support closures |
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diff
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|
5789 |
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diff
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|
5790 // Abstract task used to preserve (i.e. copy) any referent objects |
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|
5791 // that are in the collection set and are pointed to by reference |
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|
5792 // objects discovered by the CM ref processor. |
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diff
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|
5793 |
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|
5794 class G1ParPreserveCMReferentsTask: public AbstractGangTask { |
4dfb2df418f2
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parents:
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|
5795 protected: |
4dfb2df418f2
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diff
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|
5796 G1CollectedHeap* _g1h; |
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diff
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|
5797 RefToScanQueueSet *_queues; |
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|
5798 ParallelTaskTerminator _terminator; |
4728
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|
5799 uint _n_workers; |
3979
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parents:
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diff
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|
5800 |
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parents:
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diff
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|
5801 public: |
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parents:
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diff
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|
5802 G1ParPreserveCMReferentsTask(G1CollectedHeap* g1h,int workers, RefToScanQueueSet *task_queues) : |
4dfb2df418f2
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|
5803 AbstractGangTask("ParPreserveCMReferents"), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
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|
5804 _g1h(g1h), |
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parents:
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diff
changeset
|
5805 _queues(task_queues), |
4dfb2df418f2
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parents:
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diff
changeset
|
5806 _terminator(workers, _queues), |
4dfb2df418f2
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parents:
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diff
changeset
|
5807 _n_workers(workers) |
4dfb2df418f2
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parents:
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diff
changeset
|
5808 { } |
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diff
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|
5809 |
4728
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parents:
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|
5810 void work(uint worker_id) { |
3979
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|
5811 ResourceMark rm; |
4dfb2df418f2
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parents:
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diff
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|
5812 HandleMark hm; |
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parents:
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diff
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|
5813 |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5814 G1ParScanThreadState pss(_g1h, worker_id, NULL); |
3979
4dfb2df418f2
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parents:
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|
5815 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
5816 |
3979
4dfb2df418f2
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parents:
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|
5817 pss.set_evac_failure_closure(&evac_failure_cl); |
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|
5818 |
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
5819 assert(pss.queue_is_empty(), "both queue and overflow should be empty"); |
3979
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parents:
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diff
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|
5820 |
4dfb2df418f2
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parents:
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diff
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|
5821 G1ParScanExtRootClosure only_copy_non_heap_cl(_g1h, &pss, NULL); |
4dfb2df418f2
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parents:
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diff
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|
5822 |
4dfb2df418f2
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diff
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|
5823 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
4dfb2df418f2
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parents:
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diff
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|
5824 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5825 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
4dfb2df418f2
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parents:
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diff
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|
5826 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5827 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5828 // We also need to mark copied objects. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5829 copy_non_heap_cl = ©_mark_non_heap_cl; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5830 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5831 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5832 // Is alive closure |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5833 G1AlwaysAliveClosure always_alive(_g1h); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5834 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5835 // Copying keep alive closure. Applied to referent objects that need |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5836 // to be copied. |
20270
b7d24d2bc8be
8047323: Remove unused _copy_metadata_obj_cl in G1CopyingKeepAliveClosure
stefank
parents:
20257
diff
changeset
|
5837 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, &pss); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5838 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5839 ReferenceProcessor* rp = _g1h->ref_processor_cm(); |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5840 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5841 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
|
5842 uint stride = MIN2(MAX2(_n_workers, 1U), limit); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5843 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5844 // 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
|
5845 // 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
|
5846 // change the worker ids. |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5847 assert(0 <= worker_id && worker_id < limit, "sanity"); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5848 assert(!rp->discovery_is_atomic(), "check this code"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5849 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5850 // 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
|
5851 for (uint idx = worker_id; idx < limit; idx += stride) { |
4014
bf2d2b8b1726
7095243: Disambiguate ReferenceProcessor::_discoveredSoftRefs
johnc
parents:
4013
diff
changeset
|
5852 DiscoveredList& ref_list = rp->discovered_refs()[idx]; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5853 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5854 DiscoveredListIterator iter(ref_list, &keep_alive, &always_alive); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5855 while (iter.has_next()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5856 // Since discovery is not atomic for the CM ref processor, we |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5857 // can see some null referent objects. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5858 iter.load_ptrs(DEBUG_ONLY(true)); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5859 oop ref = iter.obj(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5860 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5861 // This will filter nulls. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5862 if (iter.is_referent_alive()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5863 iter.make_referent_alive(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5864 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5865 iter.move_to_next(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5866 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5867 } |
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
5868 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5869 // Drain the queue - which may cause stealing |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5870 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _queues, &_terminator); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5871 drain_queue.do_void(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5872 // Allocation buffers were retired at the end of G1ParEvacuateFollowersClosure |
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
5873 assert(pss.queue_is_empty(), "should be"); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5874 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5875 }; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5876 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5877 // Weak Reference processing during an evacuation pause (part 1). |
6819 | 5878 void G1CollectedHeap::process_discovered_references(uint no_of_gc_workers) { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5879 double ref_proc_start = os::elapsedTime(); |
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
5880 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5881 ReferenceProcessor* rp = _ref_processor_stw; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5882 assert(rp->discovery_enabled(), "should have been enabled"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5883 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5884 // Any reference objects, in the collection set, that were 'discovered' |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5885 // 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
|
5886 // applying the external root copy closure to the discovered lists, or |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5887 // by following an RSet entry). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5888 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5889 // 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
|
5890 // reference objects point to may not have been copied: the STW ref |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5891 // processor would have seen that the reference object had already |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5892 // been 'discovered' and would have skipped discovering the reference, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5893 // but would not have treated the reference object as a regular oop. |
10405 | 5894 // 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
|
5895 // referent object. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5896 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5897 // We need to explicitly copy these referent objects - the references |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5898 // will be processed at the end of remarking. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5899 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5900 // 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
|
5901 // 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
|
5902 // referents points to another object which is also referenced by an |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5903 // object discovered by the STW ref processor. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5904 |
4711 | 5905 assert(!G1CollectedHeap::use_parallel_gc_threads() || |
6819 | 5906 no_of_gc_workers == workers()->active_workers(), |
5907 "Need to reset active GC workers"); | |
5908 | |
5909 set_par_threads(no_of_gc_workers); | |
5910 G1ParPreserveCMReferentsTask keep_cm_referents(this, | |
5911 no_of_gc_workers, | |
5912 _task_queues); | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5913 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5914 if (G1CollectedHeap::use_parallel_gc_threads()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5915 workers()->run_task(&keep_cm_referents); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5916 } else { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5917 keep_cm_referents.work(0); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5918 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5919 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5920 set_par_threads(0); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5921 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5922 // Closure to test whether a referent is alive. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5923 G1STWIsAliveClosure is_alive(this); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5924 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5925 // Even when parallel reference processing is enabled, the processing |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5926 // 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
|
5927 // 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
|
5928 // JNI refs. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5929 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5930 // Use only a single queue for this PSS. |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5931 G1ParScanThreadState pss(this, 0, NULL); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5932 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5933 // We do not embed a reference processor in the copying/scanning |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5934 // closures while we're actually processing the discovered |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5935 // reference objects. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5936 G1ParScanHeapEvacFailureClosure evac_failure_cl(this, &pss, NULL); |
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
5937 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5938 pss.set_evac_failure_closure(&evac_failure_cl); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5939 |
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
5940 assert(pss.queue_is_empty(), "pre-condition"); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5941 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5942 G1ParScanExtRootClosure only_copy_non_heap_cl(this, &pss, NULL); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5943 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5944 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(this, &pss, NULL); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5945 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5946 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5947 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5948 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5949 // We also need to mark copied objects. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5950 copy_non_heap_cl = ©_mark_non_heap_cl; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5951 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5952 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5953 // Keep alive closure. |
20270
b7d24d2bc8be
8047323: Remove unused _copy_metadata_obj_cl in G1CopyingKeepAliveClosure
stefank
parents:
20257
diff
changeset
|
5954 G1CopyingKeepAliveClosure keep_alive(this, copy_non_heap_cl, &pss); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5955 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5956 // Serial Complete GC closure |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5957 G1STWDrainQueueClosure drain_queue(this, &pss); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5958 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5959 // Setup the soft refs policy... |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5960 rp->setup_policy(false); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5961 |
10405 | 5962 ReferenceProcessorStats stats; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5963 if (!rp->processing_is_mt()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5964 // Serial reference processing... |
10405 | 5965 stats = rp->process_discovered_references(&is_alive, |
5966 &keep_alive, | |
5967 &drain_queue, | |
5968 NULL, | |
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5969 _gc_timer_stw, |
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5970 _gc_tracer_stw->gc_id()); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5971 } else { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5972 // Parallel reference processing |
6819 | 5973 assert(rp->num_q() == no_of_gc_workers, "sanity"); |
5974 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
5975 | |
5976 G1STWRefProcTaskExecutor par_task_executor(this, workers(), _task_queues, no_of_gc_workers); | |
10405 | 5977 stats = rp->process_discovered_references(&is_alive, |
5978 &keep_alive, | |
5979 &drain_queue, | |
5980 &par_task_executor, | |
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5981 _gc_timer_stw, |
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5982 _gc_tracer_stw->gc_id()); |
10405 | 5983 } |
5984 | |
5985 _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
|
5986 |
983092f35ff7
8028710: G1 does not retire allocation buffers after reference processing work
tschatzl
parents:
20212
diff
changeset
|
5987 // We have completed copying any necessary live referent objects. |
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
5988 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
|
5989 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5990 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
|
5991 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
|
5992 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5993 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5994 // Weak Reference processing during an evacuation pause (part 2). |
6819 | 5995 void G1CollectedHeap::enqueue_discovered_references(uint no_of_gc_workers) { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5996 double ref_enq_start = os::elapsedTime(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5997 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5998 ReferenceProcessor* rp = _ref_processor_stw; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5999 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
|
6000 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6001 // Now enqueue any remaining on the discovered lists on to |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6002 // the pending list. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6003 if (!rp->processing_is_mt()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6004 // Serial reference processing... |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6005 rp->enqueue_discovered_references(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6006 } else { |
10405 | 6007 // Parallel reference enqueueing |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6008 |
6819 | 6009 assert(no_of_gc_workers == workers()->active_workers(), |
6010 "Need to reset active workers"); | |
6011 assert(rp->num_q() == no_of_gc_workers, "sanity"); | |
6012 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
6013 | |
6014 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
|
6015 rp->enqueue_discovered_references(&par_task_executor); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6016 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6017 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6018 rp->verify_no_references_recorded(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6019 assert(!rp->discovery_enabled(), "should have been disabled"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6020 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6021 // FIXME |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6022 // 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
|
6023 // Should we do that here also? We could, but it is a serial operation |
10405 | 6024 // and could significantly increase the pause time. |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6025 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6026 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
|
6027 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
|
6028 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6029 |
10405 | 6030 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
|
6031 _expand_heap_after_alloc_failure = true; |
10405 | 6032 _evacuation_failed = false; |
342 | 6033 |
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
6034 // 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
|
6035 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
|
6036 |
342 | 6037 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
|
6038 |
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
6039 // Disable the hot card cache. |
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
6040 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
|
6041 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
|
6042 hot_card_cache->set_use_cache(false); |
889 | 6043 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
6044 uint n_workers; |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6045 if (G1CollectedHeap::use_parallel_gc_threads()) { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6046 n_workers = |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6047 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6048 workers()->active_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6049 Threads::number_of_non_daemon_threads()); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6050 assert(UseDynamicNumberOfGCThreads || |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6051 n_workers == workers()->total_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6052 "If not dynamic should be using all the workers"); |
4711 | 6053 workers()->set_active_workers(n_workers); |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6054 set_par_threads(n_workers); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6055 } else { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6056 assert(n_par_threads() == 0, |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6057 "Should be the original non-parallel value"); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6058 n_workers = 1; |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6059 } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6060 |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6061 G1ParTask g1_par_task(this, _task_queues); |
342 | 6062 |
6063 init_for_evac_failure(NULL); | |
6064 | |
6065 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
|
6066 |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
6067 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
|
6068 double start_par_time_sec = os::elapsedTime(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
6069 double end_par_time_sec; |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
6070 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
6071 { |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
6072 StrongRootsScope srs(this); |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
6073 // InitialMark needs claim bits to keep track of the marked-through CLDs. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
6074 if (g1_policy()->during_initial_mark_pause()) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
6075 ClassLoaderDataGraph::clear_claimed_marks(); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
6076 } |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
6077 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
6078 if (G1CollectedHeap::use_parallel_gc_threads()) { |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
6079 // 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
|
6080 if (ParallelGCVerbose) G1ParScanThreadState::print_termination_stats_hdr(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
6081 // These tasks use ShareHeap::_process_strong_tasks |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
6082 assert(UseDynamicNumberOfGCThreads || |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
6083 workers()->active_workers() == workers()->total_workers(), |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
6084 "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
|
6085 workers()->run_task(&g1_par_task); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
6086 } else { |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
6087 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
|
6088 g1_par_task.work(0); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
6089 } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
6090 end_par_time_sec = os::elapsedTime(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
6091 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
6092 // 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
|
6093 // 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
|
6094 // 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
|
6095 // 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
|
6096 // reported parallel time. |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
6097 } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
6098 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
6099 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
|
6100 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
|
6101 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
6102 double code_root_fixup_time_ms = |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
6103 (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
|
6104 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
|
6105 |
342 | 6106 set_par_threads(0); |
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
6107 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6108 // Process any discovered reference objects - we have |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6109 // to do this _before_ we retire the GC alloc regions |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6110 // as we may have to copy some 'reachable' referent |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6111 // objects (and their reachable sub-graphs) that were |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6112 // not copied during the pause. |
6819 | 6113 process_discovered_references(n_workers); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6114 |
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
6115 // Weak root processing. |
342 | 6116 { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6117 G1STWIsAliveClosure is_alive(this); |
342 | 6118 G1KeepAliveClosure keep_alive(this); |
6119 JNIHandles::weak_oops_do(&is_alive, &keep_alive); | |
17764 | 6120 if (G1StringDedup::is_enabled()) { |
6121 G1StringDedup::unlink_or_oops_do(&is_alive, &keep_alive); | |
6122 } | |
342 | 6123 } |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6124 |
10405 | 6125 release_gc_alloc_regions(n_workers, evacuation_info); |
342 | 6126 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
|
6127 |
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
6128 // 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
|
6129 // 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
|
6130 // 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
|
6131 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
|
6132 hot_card_cache->set_use_cache(true); |
342 | 6133 |
12080 | 6134 // Migrate the strong code roots attached to each region in |
6135 // the collection set. Ideally we would like to do this | |
6136 // after we have finished the scanning/evacuation of the | |
6137 // strong code roots for a particular heap region. | |
6138 migrate_strong_code_roots(); | |
6139 | |
17753
191174b49bec
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
17749
diff
changeset
|
6140 purge_code_root_memory(); |
191174b49bec
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
17749
diff
changeset
|
6141 |
12080 | 6142 if (g1_policy()->during_initial_mark_pause()) { |
6143 // Reset the claim values set during marking the strong code roots | |
6144 reset_heap_region_claim_values(); | |
6145 } | |
6146 | |
342 | 6147 finalize_for_evac_failure(); |
6148 | |
6149 if (evacuation_failed()) { | |
6150 remove_self_forwarding_pointers(); | |
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
6151 |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
6152 // Reset the G1EvacuationFailureALot counters and flags |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
6153 // 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
|
6154 // evacuation failure occurs. |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
6155 NOT_PRODUCT(reset_evacuation_should_fail();) |
342 | 6156 } |
6157 | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6158 // Enqueue any remaining references remaining on the STW |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6159 // reference processor's discovered lists. We need to do |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6160 // this after the card table is cleaned (and verified) as |
10405 | 6161 // the act of enqueueing entries on to the pending list |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6162 // will log these updates (and dirty their associated |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6163 // cards). We need these updates logged to update any |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6164 // RSets. |
6819 | 6165 enqueue_discovered_references(n_workers); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
6166 |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
6167 if (G1DeferredRSUpdate) { |
17756
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
6168 redirty_logged_cards(); |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
6169 } |
342 | 6170 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
6171 } | |
6172 | |
2152 | 6173 void G1CollectedHeap::free_region(HeapRegion* hr, |
6174 FreeRegionList* free_list, | |
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
6175 bool par, |
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
6176 bool locked) { |
2152 | 6177 assert(!hr->isHumongous(), "this is only for non-humongous regions"); |
6178 assert(!hr->is_empty(), "the region should not be empty"); | |
6179 assert(free_list != NULL, "pre-condition"); | |
6180 | |
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6181 if (G1VerifyBitmaps) { |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6182 MemRegion mr(hr->bottom(), hr->end()); |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6183 concurrent_mark()->clearRangePrevBitmap(mr); |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6184 } |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6185 |
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
6186 // 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
|
6187 // 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
|
6188 // (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
|
6189 if (!hr->is_young()) { |
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
6190 _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
|
6191 } |
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
6192 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
|
6193 free_list->add_ordered(hr); |
2152 | 6194 } |
6195 | |
6196 void G1CollectedHeap::free_humongous_region(HeapRegion* hr, | |
6197 FreeRegionList* free_list, | |
6198 bool par) { | |
6199 assert(hr->startsHumongous(), "this is only for starts humongous regions"); | |
6200 assert(free_list != NULL, "pre-condition"); | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6201 |
2152 | 6202 size_t hr_capacity = hr->capacity(); |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
6203 // 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
|
6204 // otherwise the information will be gone. |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
6205 uint last_index = hr->last_hc_index(); |
2152 | 6206 hr->set_notHumongous(); |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6207 free_region(hr, free_list, par); |
2152 | 6208 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
6209 uint i = hr->hrs_index() + 1; |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
6210 while (i < last_index) { |
3766 | 6211 HeapRegion* curr_hr = region_at(i); |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
6212 assert(curr_hr->continuesHumongous(), "invariant"); |
2152 | 6213 curr_hr->set_notHumongous(); |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6214 free_region(curr_hr, free_list, par); |
2152 | 6215 i += 1; |
6216 } | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6217 } |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6218 |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6219 void G1CollectedHeap::remove_from_old_sets(const HeapRegionSetCount& old_regions_removed, |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6220 const HeapRegionSetCount& humongous_regions_removed) { |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6221 if (old_regions_removed.length() > 0 || humongous_regions_removed.length() > 0) { |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6222 MutexLockerEx x(OldSets_lock, Mutex::_no_safepoint_check_flag); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6223 _old_set.bulk_remove(old_regions_removed); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6224 _humongous_set.bulk_remove(humongous_regions_removed); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6225 } |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6226 |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6227 } |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6228 |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6229 void G1CollectedHeap::prepend_to_freelist(FreeRegionList* list) { |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6230 assert(list != NULL, "list can't be null"); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6231 if (!list->is_empty()) { |
2152 | 6232 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
|
6233 _free_list.add_ordered(list); |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6234 } |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6235 } |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6236 |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6237 void G1CollectedHeap::decrement_summary_bytes(size_t bytes) { |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6238 assert(_summary_bytes_used >= bytes, |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6239 err_msg("invariant: _summary_bytes_used: "SIZE_FORMAT" should be >= bytes: "SIZE_FORMAT, |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6240 _summary_bytes_used, bytes)); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6241 _summary_bytes_used -= bytes; |
342 | 6242 } |
6243 | |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6244 class G1ParCleanupCTTask : public AbstractGangTask { |
12343 | 6245 G1SATBCardTableModRefBS* _ct_bs; |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6246 G1CollectedHeap* _g1h; |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6247 HeapRegion* volatile _su_head; |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6248 public: |
12343 | 6249 G1ParCleanupCTTask(G1SATBCardTableModRefBS* ct_bs, |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6250 G1CollectedHeap* g1h) : |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6251 AbstractGangTask("G1 Par Cleanup CT Task"), |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6252 _ct_bs(ct_bs), _g1h(g1h) { } |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6253 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
6254 void work(uint worker_id) { |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6255 HeapRegion* r; |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6256 while (r = _g1h->pop_dirty_cards_region()) { |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6257 clear_cards(r); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6258 } |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6259 } |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6260 |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6261 void clear_cards(HeapRegion* r) { |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6262 // Cards of the survivors should have already been dirtied. |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6263 if (!r->is_survivor()) { |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6264 _ct_bs->clear(MemRegion(r->bottom(), r->end())); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6265 } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6266 } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6267 }; |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6268 |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6269 #ifndef PRODUCT |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6270 class G1VerifyCardTableCleanup: public HeapRegionClosure { |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6271 G1CollectedHeap* _g1h; |
12343 | 6272 G1SATBCardTableModRefBS* _ct_bs; |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6273 public: |
12343 | 6274 G1VerifyCardTableCleanup(G1CollectedHeap* g1h, G1SATBCardTableModRefBS* ct_bs) |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6275 : _g1h(g1h), _ct_bs(ct_bs) { } |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6276 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
|
6277 if (r->is_survivor()) { |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6278 _g1h->verify_dirty_region(r); |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6279 } else { |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6280 _g1h->verify_not_dirty_region(r); |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6281 } |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6282 return false; |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6283 } |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6284 }; |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6285 |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6286 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...)
tonyp
parents:
3293
diff
changeset
|
6287 // All of the region should be clean. |
12343 | 6288 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
|
6289 MemRegion mr(hr->bottom(), hr->end()); |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6290 ct_bs->verify_not_dirty_region(mr); |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6291 } |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6292 |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6293 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
|
6294 // 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
|
6295 // 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
|
6296 // 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
|
6297 // 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
|
6298 // 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
|
6299 // 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
|
6300 // is dirty. |
12343 | 6301 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
|
6302 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
|
6303 if (hr->is_young()) { |
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6304 ct_bs->verify_g1_young_region(mr); |
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6305 } else { |
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6306 ct_bs->verify_dirty_region(mr); |
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6307 } |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6308 } |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6309 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6310 void G1CollectedHeap::verify_dirty_young_list(HeapRegion* head) { |
12343 | 6311 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6312 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
|
6313 verify_dirty_region(hr); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6314 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6315 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6316 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6317 void G1CollectedHeap::verify_dirty_young_regions() { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6318 verify_dirty_young_list(_young_list->first_region()); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6319 } |
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6320 |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6321 bool G1CollectedHeap::verify_no_bits_over_tams(const char* bitmap_name, CMBitMapRO* bitmap, |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6322 HeapWord* tams, HeapWord* end) { |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6323 guarantee(tams <= end, |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6324 err_msg("tams: "PTR_FORMAT" end: "PTR_FORMAT, tams, end)); |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6325 HeapWord* result = bitmap->getNextMarkedWordAddress(tams, end); |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6326 if (result < end) { |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6327 gclog_or_tty->cr(); |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6328 gclog_or_tty->print_cr("## wrong marked address on %s bitmap: "PTR_FORMAT, |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6329 bitmap_name, result); |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6330 gclog_or_tty->print_cr("## %s tams: "PTR_FORMAT" end: "PTR_FORMAT, |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6331 bitmap_name, tams, end); |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6332 return false; |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6333 } |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6334 return true; |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6335 } |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6336 |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6337 bool G1CollectedHeap::verify_bitmaps(const char* caller, HeapRegion* hr) { |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6338 CMBitMapRO* prev_bitmap = concurrent_mark()->prevMarkBitMap(); |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6339 CMBitMapRO* next_bitmap = (CMBitMapRO*) concurrent_mark()->nextMarkBitMap(); |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6340 |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6341 HeapWord* bottom = hr->bottom(); |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6342 HeapWord* ptams = hr->prev_top_at_mark_start(); |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6343 HeapWord* ntams = hr->next_top_at_mark_start(); |
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6344 HeapWord* end = hr->end(); |
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6345 |
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6346 bool res_p = verify_no_bits_over_tams("prev", prev_bitmap, ptams, end); |
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6347 |
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6348 bool res_n = true; |
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6349 // We reset mark_in_progress() before we reset _cmThread->in_progress() and in this window |
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6350 // we do the clearing of the next bitmap concurrently. Thus, we can not verify the bitmap |
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6351 // if we happen to be in that state. |
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6352 if (mark_in_progress() || !_cmThread->in_progress()) { |
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6353 res_n = verify_no_bits_over_tams("next", next_bitmap, ntams, end); |
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6354 } |
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6355 if (!res_p || !res_n) { |
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6356 gclog_or_tty->print_cr("#### Bitmap verification failed for "HR_FORMAT, |
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6357 HR_FORMAT_PARAMS(hr)); |
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6358 gclog_or_tty->print_cr("#### Caller: %s", caller); |
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6359 return false; |
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|
6360 } |
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|
6361 return true; |
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|
6362 } |
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|
6363 |
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6364 void G1CollectedHeap::check_bitmaps(const char* caller, HeapRegion* hr) { |
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6365 if (!G1VerifyBitmaps) return; |
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6366 |
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6367 guarantee(verify_bitmaps(caller, hr), "bitmap verification"); |
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6368 } |
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|
6369 |
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6370 class G1VerifyBitmapClosure : public HeapRegionClosure { |
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6371 private: |
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6372 const char* _caller; |
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6373 G1CollectedHeap* _g1h; |
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6374 bool _failures; |
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|
6375 |
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|
6376 public: |
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6377 G1VerifyBitmapClosure(const char* caller, G1CollectedHeap* g1h) : |
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6378 _caller(caller), _g1h(g1h), _failures(false) { } |
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|
6379 |
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|
6380 bool failures() { return _failures; } |
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6381 |
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|
6382 virtual bool doHeapRegion(HeapRegion* hr) { |
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|
6383 if (hr->continuesHumongous()) return false; |
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6384 |
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6385 bool result = _g1h->verify_bitmaps(_caller, hr); |
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6386 if (!result) { |
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6387 _failures = true; |
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|
6388 } |
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|
6389 return false; |
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|
6390 } |
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|
6391 }; |
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|
6392 |
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|
6393 void G1CollectedHeap::check_bitmaps(const char* caller) { |
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|
6394 if (!G1VerifyBitmaps) return; |
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|
6395 |
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|
6396 G1VerifyBitmapClosure cl(caller, this); |
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|
6397 heap_region_iterate(&cl); |
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|
6398 guarantee(!cl.failures(), "bitmap verification"); |
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|
6399 } |
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|
6400 #endif // PRODUCT |
940
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|
6401 |
342 | 6402 void G1CollectedHeap::cleanUpCardTable() { |
12343 | 6403 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
342 | 6404 double start = os::elapsedTime(); |
6405 | |
4023 | 6406 { |
6407 // Iterate over the dirty cards region list. | |
6408 G1ParCleanupCTTask cleanup_task(ct_bs, this); | |
6409 | |
4711 | 6410 if (G1CollectedHeap::use_parallel_gc_threads()) { |
6411 set_par_threads(); | |
4023 | 6412 workers()->run_task(&cleanup_task); |
6413 set_par_threads(0); | |
6414 } else { | |
6415 while (_dirty_cards_region_list) { | |
6416 HeapRegion* r = _dirty_cards_region_list; | |
6417 cleanup_task.clear_cards(r); | |
6418 _dirty_cards_region_list = r->get_next_dirty_cards_region(); | |
6419 if (_dirty_cards_region_list == r) { | |
6420 // The last region. | |
6421 _dirty_cards_region_list = NULL; | |
6422 } | |
6423 r->set_next_dirty_cards_region(NULL); | |
796
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|
6424 } |
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|
6425 } |
4023 | 6426 #ifndef PRODUCT |
6427 if (G1VerifyCTCleanup || VerifyAfterGC) { | |
6428 G1VerifyCardTableCleanup cleanup_verifier(this, ct_bs); | |
6429 heap_region_iterate(&cleanup_verifier); | |
6430 } | |
6431 #endif | |
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|
6432 } |
1394
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|
6433 |
342 | 6434 double elapsed = os::elapsedTime() - start; |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
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6188
diff
changeset
|
6435 g1_policy()->phase_times()->record_clear_ct_time(elapsed * 1000.0); |
342 | 6436 } |
6437 | |
10405 | 6438 void G1CollectedHeap::free_collection_set(HeapRegion* cs_head, EvacuationInfo& evacuation_info) { |
2152 | 6439 size_t pre_used = 0; |
6440 FreeRegionList local_free_list("Local List for CSet Freeing"); | |
6441 | |
342 | 6442 double young_time_ms = 0.0; |
6443 double non_young_time_ms = 0.0; | |
6444 | |
1394
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6445 // Since the collection set is a superset of the the young list, |
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|
6446 // all we need to do to clear the young list is clear its |
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|
6447 // head and length, and unlink any young regions in the code below |
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|
6448 _young_list->clear(); |
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|
6449 |
342 | 6450 G1CollectorPolicy* policy = g1_policy(); |
6451 | |
6452 double start_sec = os::elapsedTime(); | |
6453 bool non_young = true; | |
6454 | |
6455 HeapRegion* cur = cs_head; | |
6456 int age_bound = -1; | |
6457 size_t rs_lengths = 0; | |
6458 | |
6459 while (cur != NULL) { | |
2361 | 6460 assert(!is_on_master_free_list(cur), "sanity"); |
342 | 6461 if (non_young) { |
6462 if (cur->is_young()) { | |
6463 double end_sec = os::elapsedTime(); | |
6464 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
6465 non_young_time_ms += elapsed_ms; | |
6466 | |
6467 start_sec = os::elapsedTime(); | |
6468 non_young = false; | |
6469 } | |
6470 } else { | |
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|
6471 if (!cur->is_young()) { |
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|
6472 double end_sec = os::elapsedTime(); |
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|
6473 double elapsed_ms = (end_sec - start_sec) * 1000.0; |
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|
6474 young_time_ms += elapsed_ms; |
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|
6475 |
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|
6476 start_sec = os::elapsedTime(); |
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diff
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|
6477 non_young = true; |
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|
6478 } |
342 | 6479 } |
6480 | |
17755
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tschatzl
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changeset
|
6481 rs_lengths += cur->rem_set()->occupied_locked(); |
342 | 6482 |
6483 HeapRegion* next = cur->next_in_collection_set(); | |
6484 assert(cur->in_collection_set(), "bad CS"); | |
6485 cur->set_next_in_collection_set(NULL); | |
6486 cur->set_in_collection_set(false); | |
6487 | |
6488 if (cur->is_young()) { | |
6489 int index = cur->young_index_in_cset(); | |
4090
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diff
changeset
|
6490 assert(index != -1, "invariant"); |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
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6008
diff
changeset
|
6491 assert((uint) index < policy->young_cset_region_length(), "invariant"); |
342 | 6492 size_t words_survived = _surviving_young_words[index]; |
6493 cur->record_surv_words_in_group(words_survived); | |
1394
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|
6494 |
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|
6495 // At this point the we have 'popped' cur from the collection set |
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|
6496 // (linked via next_in_collection_set()) but it is still in the |
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|
6497 // young list (linked via next_young_region()). Clear the |
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|
6498 // _next_young_region field. |
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|
6499 cur->set_next_young_region(NULL); |
342 | 6500 } else { |
6501 int index = cur->young_index_in_cset(); | |
4090
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|
6502 assert(index == -1, "invariant"); |
342 | 6503 } |
6504 | |
6505 assert( (cur->is_young() && cur->young_index_in_cset() > -1) || | |
6506 (!cur->is_young() && cur->young_index_in_cset() == -1), | |
6507 "invariant" ); | |
6508 | |
6509 if (!cur->evacuation_failed()) { | |
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|
6510 MemRegion used_mr = cur->used_region(); |
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|
6511 |
342 | 6512 // And the region is empty. |
4097
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changeset
|
6513 assert(!used_mr.is_empty(), "Should not have empty regions in a CS."); |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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17727
diff
changeset
|
6514 pre_used += cur->used(); |
17755
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diff
changeset
|
6515 free_region(cur, &local_free_list, false /* par */, true /* locked */); |
342 | 6516 } else { |
6517 cur->uninstall_surv_rate_group(); | |
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|
6518 if (cur->is_young()) { |
342 | 6519 cur->set_young_index_in_cset(-1); |
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|
6520 } |
342 | 6521 cur->set_not_young(); |
6522 cur->set_evacuation_failed(false); | |
4072 | 6523 // The region is now considered to be old. |
6524 _old_set.add(cur); | |
10405 | 6525 evacuation_info.increment_collectionset_used_after(cur->used()); |
342 | 6526 } |
6527 cur = next; | |
6528 } | |
6529 | |
10405 | 6530 evacuation_info.set_regions_freed(local_free_list.length()); |
342 | 6531 policy->record_max_rs_lengths(rs_lengths); |
6532 policy->cset_regions_freed(); | |
6533 | |
6534 double end_sec = os::elapsedTime(); | |
6535 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
4097
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|
6536 |
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diff
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|
6537 if (non_young) { |
342 | 6538 non_young_time_ms += elapsed_ms; |
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changeset
|
6539 } else { |
342 | 6540 young_time_ms += elapsed_ms; |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6541 } |
342 | 6542 |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6543 prepend_to_freelist(&local_free_list); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6544 decrement_summary_bytes(pre_used); |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
6545 policy->phase_times()->record_young_free_cset_time_ms(young_time_ms); |
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
6546 policy->phase_times()->record_non_young_free_cset_time_ms(non_young_time_ms); |
342 | 6547 } |
6548 | |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6549 class G1FreeHumongousRegionClosure : public HeapRegionClosure { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6550 private: |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6551 FreeRegionList* _free_region_list; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6552 HeapRegionSet* _proxy_set; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6553 HeapRegionSetCount _humongous_regions_removed; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6554 size_t _freed_bytes; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6555 public: |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6556 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6557 G1FreeHumongousRegionClosure(FreeRegionList* free_region_list) : |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6558 _free_region_list(free_region_list), _humongous_regions_removed(), _freed_bytes(0) { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6559 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6560 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6561 virtual bool doHeapRegion(HeapRegion* r) { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6562 if (!r->startsHumongous()) { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6563 return false; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6564 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6565 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6566 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6567 |
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6568 oop obj = (oop)r->bottom(); |
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6569 CMBitMap* next_bitmap = g1h->concurrent_mark()->nextMarkBitMap(); |
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6570 |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6571 // The following checks whether the humongous object is live are sufficient. |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6572 // The main additional check (in addition to having a reference from the roots |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6573 // or the young gen) is whether the humongous object has a remembered set entry. |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6574 // |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
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diff
changeset
|
6575 // A humongous object cannot be live if there is no remembered set for it |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6576 // because: |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6577 // - there can be no references from within humongous starts regions referencing |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6578 // the object because we never allocate other objects into them. |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6579 // (I.e. there are no intra-region references that may be missed by the |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6580 // remembered set) |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6581 // - as soon there is a remembered set entry to the humongous starts region |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6582 // (i.e. it has "escaped" to an old object) this remembered set entry will stay |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6583 // until the end of a concurrent mark. |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6584 // |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6585 // It is not required to check whether the object has been found dead by marking |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6586 // or not, in fact it would prevent reclamation within a concurrent cycle, as |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6587 // all objects allocated during that time are considered live. |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6588 // SATB marking is even more conservative than the remembered set. |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6589 // So if at this point in the collection there is no remembered set entry, |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6590 // nobody has a reference to it. |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6591 // At the start of collection we flush all refinement logs, and remembered sets |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6592 // are completely up-to-date wrt to references to the humongous object. |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6593 // |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6594 // Other implementation considerations: |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6595 // - never consider object arrays: while they are a valid target, they have not |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6596 // been observed to be used as temporary objects. |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6597 // - they would also pose considerable effort for cleaning up the the remembered |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6598 // sets. |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6599 // While this cleanup is not strictly necessary to be done (or done instantly), |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6600 // given that their occurrence is very low, this saves us this additional |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6601 // complexity. |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6602 uint region_idx = r->hrs_index(); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6603 if (g1h->humongous_is_live(region_idx) || |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6604 g1h->humongous_region_is_always_live(region_idx)) { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6605 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6606 if (G1TraceReclaimDeadHumongousObjectsAtYoungGC) { |
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6607 gclog_or_tty->print_cr("Live humongous %d region %d with remset "SIZE_FORMAT" code roots "SIZE_FORMAT" is marked %d live-other %d obj array %d", |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6608 r->isHumongous(), |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6609 region_idx, |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6610 r->rem_set()->occupied(), |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6611 r->rem_set()->strong_code_roots_list_length(), |
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6612 next_bitmap->isMarked(r->bottom()), |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6613 g1h->humongous_is_live(region_idx), |
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6614 obj->is_objArray() |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6615 ); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6616 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6617 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6618 return false; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6619 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6620 |
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6621 guarantee(!obj->is_objArray(), |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6622 err_msg("Eagerly reclaiming object arrays is not supported, but the object "PTR_FORMAT" is.", |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6623 r->bottom())); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6624 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6625 if (G1TraceReclaimDeadHumongousObjectsAtYoungGC) { |
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6626 gclog_or_tty->print_cr("Reclaim humongous region %d start "PTR_FORMAT" region %d length "UINT32_FORMAT" with remset "SIZE_FORMAT" code roots "SIZE_FORMAT" is marked %d live-other %d obj array %d", |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6627 r->isHumongous(), |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6628 r->bottom(), |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6629 region_idx, |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6630 r->region_num(), |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6631 r->rem_set()->occupied(), |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6632 r->rem_set()->strong_code_roots_list_length(), |
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6633 next_bitmap->isMarked(r->bottom()), |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6634 g1h->humongous_is_live(region_idx), |
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6635 obj->is_objArray() |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6636 ); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6637 } |
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6638 // Need to clear mark bit of the humongous object if already set. |
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6639 if (next_bitmap->isMarked(r->bottom())) { |
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6640 next_bitmap->clear(r->bottom()); |
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6641 } |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6642 _freed_bytes += r->used(); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6643 r->set_containing_set(NULL); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6644 _humongous_regions_removed.increment(1u, r->capacity()); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6645 g1h->free_humongous_region(r, _free_region_list, false); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6646 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6647 return false; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6648 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6649 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6650 HeapRegionSetCount& humongous_free_count() { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6651 return _humongous_regions_removed; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6652 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6653 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6654 size_t bytes_freed() const { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6655 return _freed_bytes; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6656 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6657 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6658 size_t humongous_reclaimed() const { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6659 return _humongous_regions_removed.length(); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6660 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6661 }; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6662 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6663 void G1CollectedHeap::eagerly_reclaim_humongous_regions() { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6664 assert_at_safepoint(true); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6665 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6666 if (!G1ReclaimDeadHumongousObjectsAtYoungGC || !_has_humongous_reclaim_candidates) { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6667 g1_policy()->phase_times()->record_fast_reclaim_humongous_time_ms(0.0, 0); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6668 return; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6669 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6670 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6671 double start_time = os::elapsedTime(); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6672 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6673 FreeRegionList local_cleanup_list("Local Humongous Cleanup List"); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6674 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6675 G1FreeHumongousRegionClosure cl(&local_cleanup_list); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6676 heap_region_iterate(&cl); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6677 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6678 HeapRegionSetCount empty_set; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6679 remove_from_old_sets(empty_set, cl.humongous_free_count()); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6680 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6681 G1HRPrinter* hr_printer = _g1h->hr_printer(); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6682 if (hr_printer->is_active()) { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6683 FreeRegionListIterator iter(&local_cleanup_list); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6684 while (iter.more_available()) { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6685 HeapRegion* hr = iter.get_next(); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6686 hr_printer->cleanup(hr); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6687 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6688 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6689 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6690 prepend_to_freelist(&local_cleanup_list); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6691 decrement_summary_bytes(cl.bytes_freed()); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6692 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6693 g1_policy()->phase_times()->record_fast_reclaim_humongous_time_ms((os::elapsedTime() - start_time) * 1000.0, |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6694 cl.humongous_reclaimed()); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6695 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6696 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6697 // This routine is similar to the above but does not record |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6698 // any policy statistics or update free lists; we are abandoning |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6699 // the current incremental collection set in preparation of a |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6700 // full collection. After the full GC we will start to build up |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6701 // the incremental collection set again. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6702 // This is only called when we're doing a full collection |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6703 // and is immediately followed by the tearing down of the young list. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6704 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6705 void G1CollectedHeap::abandon_collection_set(HeapRegion* cs_head) { |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6706 HeapRegion* cur = cs_head; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6707 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6708 while (cur != NULL) { |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6709 HeapRegion* next = cur->next_in_collection_set(); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6710 assert(cur->in_collection_set(), "bad CS"); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6711 cur->set_next_in_collection_set(NULL); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6712 cur->set_in_collection_set(false); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6713 cur->set_young_index_in_cset(-1); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6714 cur = next; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6715 } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6716 } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6717 |
2152 | 6718 void G1CollectedHeap::set_free_regions_coming() { |
6719 if (G1ConcRegionFreeingVerbose) { | |
6720 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
6721 "setting free regions coming"); | |
6722 } | |
6723 | |
6724 assert(!free_regions_coming(), "pre-condition"); | |
6725 _free_regions_coming = true; | |
342 | 6726 } |
6727 | |
2152 | 6728 void G1CollectedHeap::reset_free_regions_coming() { |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
6729 assert(free_regions_coming(), "pre-condition"); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
6730 |
2152 | 6731 { |
6732 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
6733 _free_regions_coming = false; | |
6734 SecondaryFreeList_lock->notify_all(); | |
6735 } | |
6736 | |
6737 if (G1ConcRegionFreeingVerbose) { | |
6738 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
6739 "reset free regions coming"); | |
342 | 6740 } |
6741 } | |
6742 | |
2152 | 6743 void G1CollectedHeap::wait_while_free_regions_coming() { |
6744 // Most of the time we won't have to wait, so let's do a quick test | |
6745 // first before we take the lock. | |
6746 if (!free_regions_coming()) { | |
6747 return; | |
6748 } | |
6749 | |
6750 if (G1ConcRegionFreeingVerbose) { | |
6751 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
6752 "waiting for free regions"); | |
342 | 6753 } |
6754 | |
6755 { | |
2152 | 6756 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
6757 while (free_regions_coming()) { | |
6758 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
342 | 6759 } |
2152 | 6760 } |
6761 | |
6762 if (G1ConcRegionFreeingVerbose) { | |
6763 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
6764 "done waiting for free regions"); | |
6765 } | |
342 | 6766 } |
6767 | |
6768 void G1CollectedHeap::set_region_short_lived_locked(HeapRegion* hr) { | |
6769 assert(heap_lock_held_for_gc(), | |
6770 "the heap lock should already be held by or for this thread"); | |
6771 _young_list->push_region(hr); | |
6772 } | |
6773 | |
6774 class NoYoungRegionsClosure: public HeapRegionClosure { | |
6775 private: | |
6776 bool _success; | |
6777 public: | |
6778 NoYoungRegionsClosure() : _success(true) { } | |
6779 bool doHeapRegion(HeapRegion* r) { | |
6780 if (r->is_young()) { | |
6781 gclog_or_tty->print_cr("Region ["PTR_FORMAT", "PTR_FORMAT") tagged as young", | |
6782 r->bottom(), r->end()); | |
6783 _success = false; | |
6784 } | |
6785 return false; | |
6786 } | |
6787 bool success() { return _success; } | |
6788 }; | |
6789 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6790 bool G1CollectedHeap::check_young_list_empty(bool check_heap, bool check_sample) { |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6791 bool ret = _young_list->check_list_empty(check_sample); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6792 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6793 if (check_heap) { |
342 | 6794 NoYoungRegionsClosure closure; |
6795 heap_region_iterate(&closure); | |
6796 ret = ret && closure.success(); | |
6797 } | |
6798 | |
6799 return ret; | |
6800 } | |
6801 | |
4072 | 6802 class TearDownRegionSetsClosure : public HeapRegionClosure { |
6803 private: | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6804 HeapRegionSet *_old_set; |
2152 | 6805 |
342 | 6806 public: |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6807 TearDownRegionSetsClosure(HeapRegionSet* old_set) : _old_set(old_set) { } |
2152 | 6808 |
342 | 6809 bool doHeapRegion(HeapRegion* r) { |
4072 | 6810 if (r->is_empty()) { |
6811 // We ignore empty regions, we'll empty the free list afterwards | |
6812 } else if (r->is_young()) { | |
6813 // We ignore young regions, we'll empty the young list afterwards | |
6814 } else if (r->isHumongous()) { | |
6815 // We ignore humongous regions, we're not tearing down the | |
6816 // humongous region set | |
342 | 6817 } else { |
4072 | 6818 // The rest should be old |
6819 _old_set->remove(r); | |
342 | 6820 } |
6821 return false; | |
6822 } | |
6823 | |
4072 | 6824 ~TearDownRegionSetsClosure() { |
6825 assert(_old_set->is_empty(), "post-condition"); | |
2152 | 6826 } |
342 | 6827 }; |
6828 | |
4072 | 6829 void G1CollectedHeap::tear_down_region_sets(bool free_list_only) { |
6830 assert_at_safepoint(true /* should_be_vm_thread */); | |
6831 | |
6832 if (!free_list_only) { | |
6833 TearDownRegionSetsClosure cl(&_old_set); | |
6834 heap_region_iterate(&cl); | |
6835 | |
17764 | 6836 // Note that emptying the _young_list is postponed and instead done as |
6837 // the first step when rebuilding the regions sets again. The reason for | |
6838 // this is that during a full GC string deduplication needs to know if | |
6839 // a collected region was young or old when the full GC was initiated. | |
4072 | 6840 } |
6841 _free_list.remove_all(); | |
6842 } | |
6843 | |
6844 class RebuildRegionSetsClosure : public HeapRegionClosure { | |
6845 private: | |
6846 bool _free_list_only; | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6847 HeapRegionSet* _old_set; |
4072 | 6848 FreeRegionList* _free_list; |
6849 size_t _total_used; | |
6850 | |
6851 public: | |
6852 RebuildRegionSetsClosure(bool free_list_only, | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6853 HeapRegionSet* old_set, FreeRegionList* free_list) : |
4072 | 6854 _free_list_only(free_list_only), |
6855 _old_set(old_set), _free_list(free_list), _total_used(0) { | |
6856 assert(_free_list->is_empty(), "pre-condition"); | |
6857 if (!free_list_only) { | |
6858 assert(_old_set->is_empty(), "pre-condition"); | |
6859 } | |
6860 } | |
6861 | |
6862 bool doHeapRegion(HeapRegion* r) { | |
6863 if (r->continuesHumongous()) { | |
6864 return false; | |
6865 } | |
6866 | |
6867 if (r->is_empty()) { | |
6868 // Add free regions to the free list | |
6869 _free_list->add_as_tail(r); | |
6870 } else if (!_free_list_only) { | |
6871 assert(!r->is_young(), "we should not come across young regions"); | |
6872 | |
6873 if (r->isHumongous()) { | |
6874 // We ignore humongous regions, we left the humongous set unchanged | |
6875 } else { | |
6876 // The rest should be old, add them to the old set | |
6877 _old_set->add(r); | |
6878 } | |
6879 _total_used += r->used(); | |
6880 } | |
6881 | |
6882 return false; | |
6883 } | |
6884 | |
6885 size_t total_used() { | |
6886 return _total_used; | |
6887 } | |
6888 }; | |
6889 | |
6890 void G1CollectedHeap::rebuild_region_sets(bool free_list_only) { | |
6891 assert_at_safepoint(true /* should_be_vm_thread */); | |
6892 | |
17764 | 6893 if (!free_list_only) { |
6894 _young_list->empty_list(); | |
6895 } | |
6896 | |
4072 | 6897 RebuildRegionSetsClosure cl(free_list_only, &_old_set, &_free_list); |
6898 heap_region_iterate(&cl); | |
6899 | |
6900 if (!free_list_only) { | |
6901 _summary_bytes_used = cl.total_used(); | |
6902 } | |
6903 assert(_summary_bytes_used == recalculate_used(), | |
6904 err_msg("inconsistent _summary_bytes_used, " | |
6905 "value: "SIZE_FORMAT" recalculated: "SIZE_FORMAT, | |
6906 _summary_bytes_used, recalculate_used())); | |
342 | 6907 } |
6908 | |
6909 void G1CollectedHeap::set_refine_cte_cl_concurrency(bool concurrent) { | |
6910 _refine_cte_cl->set_concurrent(concurrent); | |
6911 } | |
6912 | |
6913 bool G1CollectedHeap::is_in_closed_subset(const void* p) const { | |
6914 HeapRegion* hr = heap_region_containing(p); | |
6915 if (hr == NULL) { | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
6916 return false; |
342 | 6917 } else { |
6918 return hr->is_in(p); | |
6919 } | |
6920 } | |
2152 | 6921 |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6922 // Methods for the mutator alloc region |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6923 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6924 HeapRegion* G1CollectedHeap::new_mutator_alloc_region(size_t word_size, |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6925 bool force) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6926 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
|
6927 assert(!force || g1_policy()->can_expand_young_list(), |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6928 "if force is true we should be able to expand the young list"); |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6929 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
|
6930 if (force || !young_list_full) { |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6931 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
|
6932 false /* is_old */, |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6933 false /* do_expand */); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6934 if (new_alloc_region != NULL) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6935 set_region_short_lived_locked(new_alloc_region); |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6936 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Eden, young_list_full); |
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6937 check_bitmaps("Mutator Region Allocation", new_alloc_region); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6938 return new_alloc_region; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6939 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6940 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6941 return NULL; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6942 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6943 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6944 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
|
6945 size_t allocated_bytes) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6946 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
|
6947 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
|
6948 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6949 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
|
6950 _summary_bytes_used += allocated_bytes; |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6951 _hr_printer.retire(alloc_region); |
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6952 // 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
|
6953 // 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
|
6954 // used space has been recored in _summary_bytes_used. |
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6955 g1mm()->update_eden_size(); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6956 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6957 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6958 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
|
6959 bool force) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6960 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
|
6961 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6962 |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6963 void G1CollectedHeap::set_par_threads() { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6964 // 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
|
6965 // in the workgroup. |
4711 | 6966 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
|
6967 uint n_workers = workers()->active_workers(); |
4711 | 6968 assert(UseDynamicNumberOfGCThreads || |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6969 n_workers == workers()->total_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6970 "Otherwise should be using the total number of workers"); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6971 if (n_workers == 0) { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6972 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
|
6973 n_workers = ParallelGCThreads; |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6974 workers()->set_active_workers(n_workers); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6975 } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6976 set_par_threads(n_workers); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6977 } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6978 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6979 void MutatorAllocRegion::retire_region(HeapRegion* alloc_region, |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6980 size_t allocated_bytes) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6981 _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
|
6982 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6983 |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6984 // 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
|
6985 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6986 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
|
6987 uint count, |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6988 GCAllocPurpose ap) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6989 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
|
6990 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6991 if (count < g1_policy()->max_regions(ap)) { |
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
17759
diff
changeset
|
6992 bool survivor = (ap == GCAllocForSurvived); |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6993 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
|
6994 !survivor, |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6995 true /* do_expand */); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6996 if (new_alloc_region != NULL) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6997 // 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
|
6998 // 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
|
6999 // for survivors too. |
20274
a8137787acfe
8047821: G1 Does not use the save_marks functionality as intended
mgerdin
parents:
20270
diff
changeset
|
7000 new_alloc_region->record_top_and_timestamp(); |
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
17759
diff
changeset
|
7001 if (survivor) { |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
7002 new_alloc_region->set_survivor(); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
7003 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Survivor); |
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
7004 check_bitmaps("Survivor Region Allocation", new_alloc_region); |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
7005 } else { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
7006 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Old); |
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
7007 check_bitmaps("Old Region Allocation", new_alloc_region); |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
7008 } |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
7009 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
|
7010 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
|
7011 return new_alloc_region; |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
7012 } else { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
7013 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
|
7014 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
7015 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
7016 return NULL; |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
7017 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
7018 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
7019 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
|
7020 size_t allocated_bytes, |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
7021 GCAllocPurpose ap) { |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
7022 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
|
7023 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
|
7024 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
|
7025 if (ap == GCAllocForSurvived) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
7026 young_list()->add_survivor_region(alloc_region); |
4072 | 7027 } else { |
7028 _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
|
7029 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
7030 _hr_printer.retire(alloc_region); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
7031 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
7032 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
7033 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
|
7034 bool force) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
7035 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
|
7036 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
|
7037 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
7038 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
7039 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
|
7040 size_t allocated_bytes) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
7041 _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
|
7042 GCAllocForSurvived); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
7043 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
7044 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
7045 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
|
7046 bool force) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
7047 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
|
7048 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
|
7049 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
7050 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
7051 void OldGCAllocRegion::retire_region(HeapRegion* alloc_region, |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
7052 size_t allocated_bytes) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
7053 _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
|
7054 GCAllocForTenured); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
7055 } |
20331
18bf0b66de52
8044406: JVM crash with JDK8 (build 1.8.0-b132) with G1 GC
poonam
parents:
20310
diff
changeset
|
7056 |
18bf0b66de52
8044406: JVM crash with JDK8 (build 1.8.0-b132) with G1 GC
poonam
parents:
20310
diff
changeset
|
7057 HeapRegion* OldGCAllocRegion::release() { |
18bf0b66de52
8044406: JVM crash with JDK8 (build 1.8.0-b132) with G1 GC
poonam
parents:
20310
diff
changeset
|
7058 HeapRegion* cur = get(); |
18bf0b66de52
8044406: JVM crash with JDK8 (build 1.8.0-b132) with G1 GC
poonam
parents:
20310
diff
changeset
|
7059 if (cur != NULL) { |
18bf0b66de52
8044406: JVM crash with JDK8 (build 1.8.0-b132) with G1 GC
poonam
parents:
20310
diff
changeset
|
7060 // Determine how far we are from the next card boundary. If it is smaller than |
18bf0b66de52
8044406: JVM crash with JDK8 (build 1.8.0-b132) with G1 GC
poonam
parents:
20310
diff
changeset
|
7061 // the minimum object size we can allocate into, expand into the next card. |
18bf0b66de52
8044406: JVM crash with JDK8 (build 1.8.0-b132) with G1 GC
poonam
parents:
20310
diff
changeset
|
7062 HeapWord* top = cur->top(); |
18bf0b66de52
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7063 HeapWord* aligned_top = (HeapWord*)align_ptr_up(top, G1BlockOffsetSharedArray::N_bytes); |
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|
7064 |
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|
7065 size_t to_allocate_words = pointer_delta(aligned_top, top, HeapWordSize); |
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|
7066 |
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|
7067 if (to_allocate_words != 0) { |
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|
7068 // We are not at a card boundary. Fill up, possibly into the next, taking the |
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|
7069 // end of the region and the minimum object size into account. |
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|
7070 to_allocate_words = MIN2(pointer_delta(cur->end(), cur->top(), HeapWordSize), |
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|
7071 MAX2(to_allocate_words, G1CollectedHeap::min_fill_size())); |
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|
7072 |
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|
7073 // Skip allocation if there is not enough space to allocate even the smallest |
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|
7074 // possible object. In this case this region will not be retained, so the |
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|
7075 // original problem cannot occur. |
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|
7076 if (to_allocate_words >= G1CollectedHeap::min_fill_size()) { |
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|
7077 HeapWord* dummy = attempt_allocation(to_allocate_words, true /* bot_updates */); |
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|
7078 CollectedHeap::fill_with_object(dummy, to_allocate_words); |
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|
7079 } |
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|
7080 } |
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|
7081 } |
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|
7082 return G1AllocRegion::release(); |
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|
7083 } |
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|
7084 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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|
7085 // Heap region set verification |
abdfc822206f
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|
7086 |
2152 | 7087 class VerifyRegionListsClosure : public HeapRegionClosure { |
7088 private: | |
17736
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|
7089 HeapRegionSet* _old_set; |
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7090 HeapRegionSet* _humongous_set; |
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7091 FreeRegionList* _free_list; |
2152 | 7092 |
7093 public: | |
17736
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|
7094 HeapRegionSetCount _old_count; |
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7095 HeapRegionSetCount _humongous_count; |
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|
7096 HeapRegionSetCount _free_count; |
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|
7097 |
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|
7098 VerifyRegionListsClosure(HeapRegionSet* old_set, |
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|
7099 HeapRegionSet* humongous_set, |
2152 | 7100 FreeRegionList* free_list) : |
17736
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7101 _old_set(old_set), _humongous_set(humongous_set), _free_list(free_list), |
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7102 _old_count(), _humongous_count(), _free_count(){ } |
2152 | 7103 |
7104 bool doHeapRegion(HeapRegion* hr) { | |
7105 if (hr->continuesHumongous()) { | |
7106 return false; | |
7107 } | |
7108 | |
7109 if (hr->is_young()) { | |
7110 // TODO | |
7111 } else if (hr->startsHumongous()) { | |
17736
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7112 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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7113 _humongous_count.increment(1u, hr->capacity()); |
2152 | 7114 } else if (hr->is_empty()) { |
17736
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|
7115 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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|
7116 _free_count.increment(1u, hr->capacity()); |
4072 | 7117 } else { |
17736
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|
7118 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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|
7119 _old_count.increment(1u, hr->capacity()); |
2152 | 7120 } |
7121 return false; | |
7122 } | |
17736
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|
7123 |
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|
7124 void verify_counts(HeapRegionSet* old_set, HeapRegionSet* humongous_set, FreeRegionList* free_list) { |
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|
7125 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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|
7126 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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|
7127 old_set->total_capacity_bytes(), _old_count.capacity())); |
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|
7128 |
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|
7129 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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|
7130 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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|
7131 humongous_set->total_capacity_bytes(), _humongous_count.capacity())); |
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|
7132 |
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|
7133 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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|
7134 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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|
7135 free_list->total_capacity_bytes(), _free_count.capacity())); |
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|
7136 } |
2152 | 7137 }; |
7138 | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
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changeset
|
7139 HeapRegion* G1CollectedHeap::new_heap_region(uint hrs_index, |
3766 | 7140 HeapWord* bottom) { |
7141 HeapWord* end = bottom + HeapRegion::GrainWords; | |
7142 MemRegion mr(bottom, end); | |
7143 assert(_g1_reserved.contains(mr), "invariant"); | |
7144 // This might return NULL if the allocation fails | |
6754
8fbf05030e24
7016955: G1: remove the is_zeroed parameter from the HeapRegion constructor
johnc
parents:
6752
diff
changeset
|
7145 return new HeapRegion(hrs_index, _bot_shared, mr); |
3766 | 7146 } |
7147 | |
2152 | 7148 void G1CollectedHeap::verify_region_sets() { |
7149 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); | |
7150 | |
7151 // First, check the explicit lists. | |
17736
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|
7152 _free_list.verify_list(); |
2152 | 7153 { |
7154 // Given that a concurrent operation might be adding regions to | |
7155 // the secondary free list we have to take the lock before | |
7156 // verifying it. | |
7157 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
17736
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|
7158 _secondary_free_list.verify_list(); |
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|
7159 } |
2152 | 7160 |
7161 // If a concurrent region freeing operation is in progress it will | |
7162 // be difficult to correctly attributed any free regions we come | |
7163 // across to the correct free list given that they might belong to | |
7164 // one of several (free_list, secondary_free_list, any local lists, | |
7165 // etc.). So, if that's the case we will skip the rest of the | |
7166 // verification operation. Alternatively, waiting for the concurrent | |
7167 // operation to complete will have a non-trivial effect on the GC's | |
7168 // operation (no concurrent operation will last longer than the | |
7169 // interval between two calls to verification) and it might hide | |
7170 // any issues that we would like to catch during testing. | |
7171 if (free_regions_coming()) { | |
7172 return; | |
7173 } | |
7174 | |
2361 | 7175 // Make sure we append the secondary_free_list on the free_list so |
7176 // that all free regions we will come across can be safely | |
7177 // attributed to the free_list. | |
7178 append_secondary_free_list_if_not_empty_with_lock(); | |
2152 | 7179 |
7180 // Finally, make sure that the region accounting in the lists is | |
7181 // consistent with what we see in the heap. | |
7182 | |
4072 | 7183 VerifyRegionListsClosure cl(&_old_set, &_humongous_set, &_free_list); |
2152 | 7184 heap_region_iterate(&cl); |
17736
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|
7185 cl.verify_counts(&_old_set, &_humongous_set, &_free_list); |
342 | 7186 } |
12080 | 7187 |
7188 // Optimized nmethod scanning | |
7189 | |
7190 class RegisterNMethodOopClosure: public OopClosure { | |
7191 G1CollectedHeap* _g1h; | |
7192 nmethod* _nm; | |
7193 | |
7194 template <class T> void do_oop_work(T* p) { | |
7195 T heap_oop = oopDesc::load_heap_oop(p); | |
7196 if (!oopDesc::is_null(heap_oop)) { | |
7197 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
7198 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
13062
28674af341ac
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|
7199 assert(!hr->continuesHumongous(), |
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|
7200 err_msg("trying to add code root "PTR_FORMAT" in continuation of humongous region "HR_FORMAT |
28674af341ac
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changeset
|
7201 " starting at "HR_FORMAT, |
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|
7202 _nm, HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()))); |
12080 | 7203 |
7204 // HeapRegion::add_strong_code_root() avoids adding duplicate | |
7205 // entries but having duplicates is OK since we "mark" nmethods | |
7206 // as visited when we scan the strong code root lists during the GC. | |
7207 hr->add_strong_code_root(_nm); | |
13062
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|
7208 assert(hr->rem_set()->strong_code_roots_list_contains(_nm), |
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|
7209 err_msg("failed to add code root "PTR_FORMAT" to remembered set of region "HR_FORMAT, |
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|
7210 _nm, HR_FORMAT_PARAMS(hr))); |
12080 | 7211 } |
7212 } | |
7213 | |
7214 public: | |
7215 RegisterNMethodOopClosure(G1CollectedHeap* g1h, nmethod* nm) : | |
7216 _g1h(g1h), _nm(nm) {} | |
7217 | |
7218 void do_oop(oop* p) { do_oop_work(p); } | |
7219 void do_oop(narrowOop* p) { do_oop_work(p); } | |
7220 }; | |
7221 | |
7222 class UnregisterNMethodOopClosure: public OopClosure { | |
7223 G1CollectedHeap* _g1h; | |
7224 nmethod* _nm; | |
7225 | |
7226 template <class T> void do_oop_work(T* p) { | |
7227 T heap_oop = oopDesc::load_heap_oop(p); | |
7228 if (!oopDesc::is_null(heap_oop)) { | |
7229 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
7230 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
13062
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|
7231 assert(!hr->continuesHumongous(), |
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|
7232 err_msg("trying to remove code root "PTR_FORMAT" in continuation of humongous region "HR_FORMAT |
28674af341ac
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|
7233 " starting at "HR_FORMAT, |
28674af341ac
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|
7234 _nm, HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()))); |
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|
7235 |
12080 | 7236 hr->remove_strong_code_root(_nm); |
13062
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|
7237 assert(!hr->rem_set()->strong_code_roots_list_contains(_nm), |
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|
7238 err_msg("failed to remove code root "PTR_FORMAT" of region "HR_FORMAT, |
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|
7239 _nm, HR_FORMAT_PARAMS(hr))); |
12080 | 7240 } |
7241 } | |
7242 | |
7243 public: | |
7244 UnregisterNMethodOopClosure(G1CollectedHeap* g1h, nmethod* nm) : | |
7245 _g1h(g1h), _nm(nm) {} | |
7246 | |
7247 void do_oop(oop* p) { do_oop_work(p); } | |
7248 void do_oop(narrowOop* p) { do_oop_work(p); } | |
7249 }; | |
7250 | |
7251 void G1CollectedHeap::register_nmethod(nmethod* nm) { | |
7252 CollectedHeap::register_nmethod(nm); | |
7253 | |
7254 guarantee(nm != NULL, "sanity"); | |
7255 RegisterNMethodOopClosure reg_cl(this, nm); | |
7256 nm->oops_do(®_cl); | |
7257 } | |
7258 | |
7259 void G1CollectedHeap::unregister_nmethod(nmethod* nm) { | |
7260 CollectedHeap::unregister_nmethod(nm); | |
7261 | |
7262 guarantee(nm != NULL, "sanity"); | |
7263 UnregisterNMethodOopClosure reg_cl(this, nm); | |
7264 nm->oops_do(®_cl, true); | |
7265 } | |
7266 | |
7267 class MigrateCodeRootsHeapRegionClosure: public HeapRegionClosure { | |
7268 public: | |
7269 bool doHeapRegion(HeapRegion *hr) { | |
13062
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|
7270 assert(!hr->isHumongous(), |
28674af341ac
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|
7271 err_msg("humongous region "HR_FORMAT" should not have been added to collection set", |
28674af341ac
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|
7272 HR_FORMAT_PARAMS(hr))); |
12080 | 7273 hr->migrate_strong_code_roots(); |
7274 return false; | |
7275 } | |
7276 }; | |
7277 | |
7278 void G1CollectedHeap::migrate_strong_code_roots() { | |
7279 MigrateCodeRootsHeapRegionClosure cl; | |
7280 double migrate_start = os::elapsedTime(); | |
7281 collection_set_iterate(&cl); | |
7282 double migration_time_ms = (os::elapsedTime() - migrate_start) * 1000.0; | |
7283 g1_policy()->phase_times()->record_strong_code_root_migration_time(migration_time_ms); | |
7284 } | |
7285 | |
17753
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7286 void G1CollectedHeap::purge_code_root_memory() { |
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7287 double purge_start = os::elapsedTime(); |
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7288 G1CodeRootSet::purge_chunks(G1CodeRootsChunkCacheKeepPercent); |
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7289 double purge_time_ms = (os::elapsedTime() - purge_start) * 1000.0; |
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7290 g1_policy()->phase_times()->record_strong_code_root_purge_time(purge_time_ms); |
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7291 } |
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7292 |
12080 | 7293 class RebuildStrongCodeRootClosure: public CodeBlobClosure { |
7294 G1CollectedHeap* _g1h; | |
7295 | |
7296 public: | |
7297 RebuildStrongCodeRootClosure(G1CollectedHeap* g1h) : | |
7298 _g1h(g1h) {} | |
7299 | |
7300 void do_code_blob(CodeBlob* cb) { | |
7301 nmethod* nm = (cb != NULL) ? cb->as_nmethod_or_null() : NULL; | |
7302 if (nm == NULL) { | |
7303 return; | |
7304 } | |
7305 | |
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7306 if (ScavengeRootsInCode) { |
12080 | 7307 _g1h->register_nmethod(nm); |
7308 } | |
7309 } | |
7310 }; | |
7311 | |
7312 void G1CollectedHeap::rebuild_strong_code_roots() { | |
7313 RebuildStrongCodeRootClosure blob_cl(this); | |
7314 CodeCache::blobs_do(&blob_cl); | |
7315 } |