Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp @ 20224:a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
Summary: After JDK-8035400 there were several opportunities to fix the visibility of several members of the G1ParScanThreadState class.
Reviewed-by: brutisso, mgerdin
author | tschatzl |
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date | Mon, 21 Jul 2014 09:41:06 +0200 |
parents | b0c374311c4e |
children | 9fec19bb0659 |
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" |
58 #include "memory/gcLocker.inline.hpp" | |
59 #include "memory/generationSpec.hpp" | |
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60 #include "memory/iterator.hpp" |
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61 #include "memory/referenceProcessor.hpp" |
1972 | 62 #include "oops/oop.inline.hpp" |
63 #include "oops/oop.pcgc.inline.hpp" | |
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64 #include "runtime/orderAccess.inline.hpp" |
1972 | 65 #include "runtime/vmThread.hpp" |
342 | 66 |
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67 size_t G1CollectedHeap::_humongous_object_threshold_in_words = 0; |
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68 |
342 | 69 // turn it on so that the contents of the young list (scan-only / |
70 // to-be-collected) are printed at "strategic" points before / during | |
71 // / after the collection --- this is useful for debugging | |
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72 #define YOUNG_LIST_VERBOSE 0 |
342 | 73 // CURRENT STATUS |
74 // This file is under construction. Search for "FIXME". | |
75 | |
76 // INVARIANTS/NOTES | |
77 // | |
78 // All allocation activity covered by the G1CollectedHeap interface is | |
1973 | 79 // serialized by acquiring the HeapLock. This happens in mem_allocate |
80 // and allocate_new_tlab, which are the "entry" points to the | |
81 // allocation code from the rest of the JVM. (Note that this does not | |
82 // apply to TLAB allocation, which is not part of this interface: it | |
83 // is done by clients of this interface.) | |
342 | 84 |
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85 // Notes on implementation of parallelism in different tasks. |
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86 // |
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87 // G1ParVerifyTask uses heap_region_par_iterate_chunked() for parallelism. |
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88 // The number of GC workers is passed to heap_region_par_iterate_chunked(). |
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89 // It does use run_task() which sets _n_workers in the task. |
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90 // G1ParTask executes g1_process_strong_roots() -> |
10405 | 91 // SharedHeap::process_strong_roots() which calls eventually to |
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92 // CardTableModRefBS::par_non_clean_card_iterate_work() which uses |
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93 // SequentialSubTasksDone. SharedHeap::process_strong_roots() also |
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94 // directly uses SubTasksDone (_process_strong_tasks field in SharedHeap). |
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95 // |
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96 |
342 | 97 // Local to this file. |
98 | |
99 class RefineCardTableEntryClosure: public CardTableEntryClosure { | |
100 bool _concurrent; | |
101 public: | |
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102 RefineCardTableEntryClosure() : _concurrent(true) { } |
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103 |
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104 bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
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105 bool oops_into_cset = G1CollectedHeap::heap()->g1_rem_set()->refine_card(card_ptr, worker_i, false); |
1705 | 106 // This path is executed by the concurrent refine or mutator threads, |
107 // concurrently, and so we do not care if card_ptr contains references | |
108 // that point into the collection set. | |
109 assert(!oops_into_cset, "should be"); | |
110 | |
20192 | 111 if (_concurrent && SuspendibleThreadSet::should_yield()) { |
342 | 112 // Caller will actually yield. |
113 return false; | |
114 } | |
115 // Otherwise, we finished successfully; return true. | |
116 return true; | |
117 } | |
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118 |
342 | 119 void set_concurrent(bool b) { _concurrent = b; } |
120 }; | |
121 | |
122 | |
123 class ClearLoggedCardTableEntryClosure: public CardTableEntryClosure { | |
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124 size_t _num_processed; |
342 | 125 CardTableModRefBS* _ctbs; |
126 int _histo[256]; | |
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127 |
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128 public: |
342 | 129 ClearLoggedCardTableEntryClosure() : |
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130 _num_processed(0), _ctbs(G1CollectedHeap::heap()->g1_barrier_set()) |
342 | 131 { |
132 for (int i = 0; i < 256; i++) _histo[i] = 0; | |
133 } | |
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134 |
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135 bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
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136 unsigned char* ujb = (unsigned char*)card_ptr; |
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137 int ind = (int)(*ujb); |
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138 _histo[ind]++; |
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139 |
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140 *card_ptr = (jbyte)CardTableModRefBS::clean_card_val(); |
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141 _num_processed++; |
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142 |
342 | 143 return true; |
144 } | |
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145 |
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146 size_t num_processed() { return _num_processed; } |
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147 |
342 | 148 void print_histo() { |
149 gclog_or_tty->print_cr("Card table value histogram:"); | |
150 for (int i = 0; i < 256; i++) { | |
151 if (_histo[i] != 0) { | |
152 gclog_or_tty->print_cr(" %d: %d", i, _histo[i]); | |
153 } | |
154 } | |
155 } | |
156 }; | |
157 | |
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158 class RedirtyLoggedCardTableEntryClosure : public CardTableEntryClosure { |
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159 private: |
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160 size_t _num_processed; |
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161 |
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162 public: |
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163 RedirtyLoggedCardTableEntryClosure() : CardTableEntryClosure(), _num_processed(0) { } |
12343 | 164 |
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165 bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
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166 *card_ptr = CardTableModRefBS::dirty_card_val(); |
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167 _num_processed++; |
342 | 168 return true; |
169 } | |
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170 |
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171 size_t num_processed() const { return _num_processed; } |
342 | 172 }; |
173 | |
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174 YoungList::YoungList(G1CollectedHeap* g1h) : |
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175 _g1h(g1h), _head(NULL), _length(0), _last_sampled_rs_lengths(0), |
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176 _survivor_head(NULL), _survivor_tail(NULL), _survivor_length(0) { |
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177 guarantee(check_list_empty(false), "just making sure..."); |
342 | 178 } |
179 | |
180 void YoungList::push_region(HeapRegion *hr) { | |
181 assert(!hr->is_young(), "should not already be young"); | |
182 assert(hr->get_next_young_region() == NULL, "cause it should!"); | |
183 | |
184 hr->set_next_young_region(_head); | |
185 _head = hr; | |
186 | |
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187 _g1h->g1_policy()->set_region_eden(hr, (int) _length); |
342 | 188 ++_length; |
189 } | |
190 | |
191 void YoungList::add_survivor_region(HeapRegion* hr) { | |
545 | 192 assert(hr->is_survivor(), "should be flagged as survivor region"); |
342 | 193 assert(hr->get_next_young_region() == NULL, "cause it should!"); |
194 | |
195 hr->set_next_young_region(_survivor_head); | |
196 if (_survivor_head == NULL) { | |
545 | 197 _survivor_tail = hr; |
342 | 198 } |
199 _survivor_head = hr; | |
200 ++_survivor_length; | |
201 } | |
202 | |
203 void YoungList::empty_list(HeapRegion* list) { | |
204 while (list != NULL) { | |
205 HeapRegion* next = list->get_next_young_region(); | |
206 list->set_next_young_region(NULL); | |
207 list->uninstall_surv_rate_group(); | |
208 list->set_not_young(); | |
209 list = next; | |
210 } | |
211 } | |
212 | |
213 void YoungList::empty_list() { | |
214 assert(check_list_well_formed(), "young list should be well formed"); | |
215 | |
216 empty_list(_head); | |
217 _head = NULL; | |
218 _length = 0; | |
219 | |
220 empty_list(_survivor_head); | |
221 _survivor_head = NULL; | |
545 | 222 _survivor_tail = NULL; |
342 | 223 _survivor_length = 0; |
224 | |
225 _last_sampled_rs_lengths = 0; | |
226 | |
227 assert(check_list_empty(false), "just making sure..."); | |
228 } | |
229 | |
230 bool YoungList::check_list_well_formed() { | |
231 bool ret = true; | |
232 | |
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233 uint length = 0; |
342 | 234 HeapRegion* curr = _head; |
235 HeapRegion* last = NULL; | |
236 while (curr != NULL) { | |
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237 if (!curr->is_young()) { |
342 | 238 gclog_or_tty->print_cr("### YOUNG REGION "PTR_FORMAT"-"PTR_FORMAT" " |
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239 "incorrectly tagged (y: %d, surv: %d)", |
342 | 240 curr->bottom(), curr->end(), |
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241 curr->is_young(), curr->is_survivor()); |
342 | 242 ret = false; |
243 } | |
244 ++length; | |
245 last = curr; | |
246 curr = curr->get_next_young_region(); | |
247 } | |
248 ret = ret && (length == _length); | |
249 | |
250 if (!ret) { | |
251 gclog_or_tty->print_cr("### YOUNG LIST seems not well formed!"); | |
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252 gclog_or_tty->print_cr("### list has %u entries, _length is %u", |
342 | 253 length, _length); |
254 } | |
255 | |
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256 return ret; |
342 | 257 } |
258 | |
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259 bool YoungList::check_list_empty(bool check_sample) { |
342 | 260 bool ret = true; |
261 | |
262 if (_length != 0) { | |
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263 gclog_or_tty->print_cr("### YOUNG LIST should have 0 length, not %u", |
342 | 264 _length); |
265 ret = false; | |
266 } | |
267 if (check_sample && _last_sampled_rs_lengths != 0) { | |
268 gclog_or_tty->print_cr("### YOUNG LIST has non-zero last sampled RS lengths"); | |
269 ret = false; | |
270 } | |
271 if (_head != NULL) { | |
272 gclog_or_tty->print_cr("### YOUNG LIST does not have a NULL head"); | |
273 ret = false; | |
274 } | |
275 if (!ret) { | |
276 gclog_or_tty->print_cr("### YOUNG LIST does not seem empty"); | |
277 } | |
278 | |
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279 return ret; |
342 | 280 } |
281 | |
282 void | |
283 YoungList::rs_length_sampling_init() { | |
284 _sampled_rs_lengths = 0; | |
285 _curr = _head; | |
286 } | |
287 | |
288 bool | |
289 YoungList::rs_length_sampling_more() { | |
290 return _curr != NULL; | |
291 } | |
292 | |
293 void | |
294 YoungList::rs_length_sampling_next() { | |
295 assert( _curr != NULL, "invariant" ); | |
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296 size_t rs_length = _curr->rem_set()->occupied(); |
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297 |
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298 _sampled_rs_lengths += rs_length; |
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299 |
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300 // The current region may not yet have been added to the |
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301 // incremental collection set (it gets added when it is |
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302 // retired as the current allocation region). |
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303 if (_curr->in_collection_set()) { |
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304 // Update the collection set policy information for this region |
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305 _g1h->g1_policy()->update_incremental_cset_info(_curr, rs_length); |
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306 } |
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307 |
342 | 308 _curr = _curr->get_next_young_region(); |
309 if (_curr == NULL) { | |
310 _last_sampled_rs_lengths = _sampled_rs_lengths; | |
311 // gclog_or_tty->print_cr("last sampled RS lengths = %d", _last_sampled_rs_lengths); | |
312 } | |
313 } | |
314 | |
315 void | |
316 YoungList::reset_auxilary_lists() { | |
317 guarantee( is_empty(), "young list should be empty" ); | |
318 assert(check_list_well_formed(), "young list should be well formed"); | |
319 | |
320 // Add survivor regions to SurvRateGroup. | |
321 _g1h->g1_policy()->note_start_adding_survivor_regions(); | |
545 | 322 _g1h->g1_policy()->finished_recalculating_age_indexes(true /* is_survivors */); |
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323 |
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324 int young_index_in_cset = 0; |
342 | 325 for (HeapRegion* curr = _survivor_head; |
326 curr != NULL; | |
327 curr = curr->get_next_young_region()) { | |
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328 _g1h->g1_policy()->set_region_survivor(curr, young_index_in_cset); |
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329 |
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330 // The region is a non-empty survivor so let's add it to |
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331 // the incremental collection set for the next evacuation |
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332 // pause. |
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333 _g1h->g1_policy()->add_region_to_incremental_cset_rhs(curr); |
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334 young_index_in_cset += 1; |
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335 } |
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336 assert((uint) young_index_in_cset == _survivor_length, "post-condition"); |
342 | 337 _g1h->g1_policy()->note_stop_adding_survivor_regions(); |
338 | |
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339 _head = _survivor_head; |
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340 _length = _survivor_length; |
342 | 341 if (_survivor_head != NULL) { |
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342 assert(_survivor_tail != NULL, "cause it shouldn't be"); |
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343 assert(_survivor_length > 0, "invariant"); |
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344 _survivor_tail->set_next_young_region(NULL); |
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345 } |
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346 |
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347 // Don't clear the survivor list handles until the start of |
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348 // the next evacuation pause - we need it in order to re-tag |
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349 // the survivor regions from this evacuation pause as 'young' |
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350 // at the start of the next. |
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351 |
545 | 352 _g1h->g1_policy()->finished_recalculating_age_indexes(false /* is_survivors */); |
342 | 353 |
354 assert(check_list_well_formed(), "young list should be well formed"); | |
355 } | |
356 | |
357 void YoungList::print() { | |
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358 HeapRegion* lists[] = {_head, _survivor_head}; |
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359 const char* names[] = {"YOUNG", "SURVIVOR"}; |
342 | 360 |
361 for (unsigned int list = 0; list < ARRAY_SIZE(lists); ++list) { | |
362 gclog_or_tty->print_cr("%s LIST CONTENTS", names[list]); | |
363 HeapRegion *curr = lists[list]; | |
364 if (curr == NULL) | |
365 gclog_or_tty->print_cr(" empty"); | |
366 while (curr != NULL) { | |
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367 gclog_or_tty->print_cr(" "HR_FORMAT", P: "PTR_FORMAT "N: "PTR_FORMAT", age: %4d", |
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368 HR_FORMAT_PARAMS(curr), |
342 | 369 curr->prev_top_at_mark_start(), |
370 curr->next_top_at_mark_start(), | |
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371 curr->age_in_surv_rate_group_cond()); |
342 | 372 curr = curr->get_next_young_region(); |
373 } | |
374 } | |
375 | |
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376 gclog_or_tty->cr(); |
342 | 377 } |
378 | |
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379 void G1CollectedHeap::push_dirty_cards_region(HeapRegion* hr) |
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380 { |
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381 // Claim the right to put the region on the dirty cards region list |
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382 // by installing a self pointer. |
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383 HeapRegion* next = hr->get_next_dirty_cards_region(); |
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384 if (next == NULL) { |
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385 HeapRegion* res = (HeapRegion*) |
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386 Atomic::cmpxchg_ptr(hr, hr->next_dirty_cards_region_addr(), |
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387 NULL); |
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388 if (res == NULL) { |
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389 HeapRegion* head; |
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390 do { |
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391 // Put the region to the dirty cards region list. |
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392 head = _dirty_cards_region_list; |
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393 next = (HeapRegion*) |
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394 Atomic::cmpxchg_ptr(hr, &_dirty_cards_region_list, head); |
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395 if (next == head) { |
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396 assert(hr->get_next_dirty_cards_region() == hr, |
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397 "hr->get_next_dirty_cards_region() != hr"); |
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398 if (next == NULL) { |
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399 // The last region in the list points to itself. |
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400 hr->set_next_dirty_cards_region(hr); |
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401 } else { |
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402 hr->set_next_dirty_cards_region(next); |
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403 } |
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404 } |
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405 } while (next != head); |
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406 } |
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407 } |
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408 } |
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409 |
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410 HeapRegion* G1CollectedHeap::pop_dirty_cards_region() |
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411 { |
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412 HeapRegion* head; |
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413 HeapRegion* hr; |
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414 do { |
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415 head = _dirty_cards_region_list; |
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416 if (head == NULL) { |
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417 return NULL; |
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418 } |
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419 HeapRegion* new_head = head->get_next_dirty_cards_region(); |
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420 if (head == new_head) { |
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421 // The last region. |
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422 new_head = NULL; |
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423 } |
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424 hr = (HeapRegion*)Atomic::cmpxchg_ptr(new_head, &_dirty_cards_region_list, |
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425 head); |
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426 } while (hr != head); |
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427 assert(hr != NULL, "invariant"); |
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428 hr->set_next_dirty_cards_region(NULL); |
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429 return hr; |
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430 } |
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431 |
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432 #ifdef ASSERT |
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433 // A region is added to the collection set as it is retired |
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434 // so an address p can point to a region which will be in the |
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435 // collection set but has not yet been retired. This method |
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436 // therefore is only accurate during a GC pause after all |
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437 // regions have been retired. It is used for debugging |
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438 // to check if an nmethod has references to objects that can |
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439 // be move during a partial collection. Though it can be |
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440 // inaccurate, it is sufficient for G1 because the conservative |
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441 // implementation of is_scavengable() for G1 will indicate that |
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442 // all nmethods must be scanned during a partial collection. |
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443 bool G1CollectedHeap::is_in_partial_collection(const void* p) { |
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444 HeapRegion* hr = heap_region_containing(p); |
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445 return hr != NULL && hr->in_collection_set(); |
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446 } |
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447 #endif |
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448 |
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449 // Returns true if the reference points to an object that |
10405 | 450 // can move in an incremental collection. |
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451 bool G1CollectedHeap::is_scavengable(const void* p) { |
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452 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
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453 G1CollectorPolicy* g1p = g1h->g1_policy(); |
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454 HeapRegion* hr = heap_region_containing(p); |
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455 if (hr == NULL) { |
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456 // null |
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457 assert(p == NULL, err_msg("Not NULL " PTR_FORMAT ,p)); |
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458 return false; |
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459 } else { |
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460 return !hr->isHumongous(); |
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461 } |
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462 } |
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463 |
342 | 464 void G1CollectedHeap::check_ct_logs_at_safepoint() { |
465 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
12343 | 466 CardTableModRefBS* ct_bs = g1_barrier_set(); |
342 | 467 |
468 // Count the dirty cards at the start. | |
469 CountNonCleanMemRegionClosure count1(this); | |
470 ct_bs->mod_card_iterate(&count1); | |
471 int orig_count = count1.n(); | |
472 | |
473 // First clear the logged cards. | |
474 ClearLoggedCardTableEntryClosure clear; | |
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475 dcqs.apply_closure_to_all_completed_buffers(&clear); |
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476 dcqs.iterate_closure_all_threads(&clear, false); |
342 | 477 clear.print_histo(); |
478 | |
479 // Now ensure that there's no dirty cards. | |
480 CountNonCleanMemRegionClosure count2(this); | |
481 ct_bs->mod_card_iterate(&count2); | |
482 if (count2.n() != 0) { | |
483 gclog_or_tty->print_cr("Card table has %d entries; %d originally", | |
484 count2.n(), orig_count); | |
485 } | |
486 guarantee(count2.n() == 0, "Card table should be clean."); | |
487 | |
488 RedirtyLoggedCardTableEntryClosure redirty; | |
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489 dcqs.apply_closure_to_all_completed_buffers(&redirty); |
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490 dcqs.iterate_closure_all_threads(&redirty, false); |
342 | 491 gclog_or_tty->print_cr("Log entries = %d, dirty cards = %d.", |
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492 clear.num_processed(), orig_count); |
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493 guarantee(redirty.num_processed() == clear.num_processed(), |
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494 err_msg("Redirtied "SIZE_FORMAT" cards, bug cleared "SIZE_FORMAT, |
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495 redirty.num_processed(), clear.num_processed())); |
342 | 496 |
497 CountNonCleanMemRegionClosure count3(this); | |
498 ct_bs->mod_card_iterate(&count3); | |
499 if (count3.n() != orig_count) { | |
500 gclog_or_tty->print_cr("Should have restored them all: orig = %d, final = %d.", | |
501 orig_count, count3.n()); | |
502 guarantee(count3.n() >= orig_count, "Should have restored them all."); | |
503 } | |
504 } | |
505 | |
506 // Private class members. | |
507 | |
508 G1CollectedHeap* G1CollectedHeap::_g1h; | |
509 | |
510 // Private methods. | |
511 | |
2152 | 512 HeapRegion* |
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513 G1CollectedHeap::new_region_try_secondary_free_list(bool is_old) { |
2152 | 514 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
515 while (!_secondary_free_list.is_empty() || free_regions_coming()) { | |
516 if (!_secondary_free_list.is_empty()) { | |
517 if (G1ConcRegionFreeingVerbose) { | |
518 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
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519 "secondary_free_list has %u entries", |
2152 | 520 _secondary_free_list.length()); |
521 } | |
522 // It looks as if there are free regions available on the | |
523 // secondary_free_list. Let's move them to the free_list and try | |
524 // again to allocate from it. | |
525 append_secondary_free_list(); | |
526 | |
527 assert(!_free_list.is_empty(), "if the secondary_free_list was not " | |
528 "empty we should have moved at least one entry to the free_list"); | |
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529 HeapRegion* res = _free_list.remove_region(is_old); |
2152 | 530 if (G1ConcRegionFreeingVerbose) { |
531 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
532 "allocated "HR_FORMAT" from secondary_free_list", | |
533 HR_FORMAT_PARAMS(res)); | |
534 } | |
535 return res; | |
536 } | |
537 | |
10405 | 538 // Wait here until we get notified either when (a) there are no |
2152 | 539 // more free regions coming or (b) some regions have been moved on |
540 // the secondary_free_list. | |
541 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
542 } | |
543 | |
544 if (G1ConcRegionFreeingVerbose) { | |
545 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
546 "could not allocate from secondary_free_list"); | |
547 } | |
548 return NULL; | |
549 } | |
550 | |
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551 HeapRegion* G1CollectedHeap::new_region(size_t word_size, bool is_old, bool do_expand) { |
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552 assert(!isHumongous(word_size) || word_size <= HeapRegion::GrainWords, |
2152 | 553 "the only time we use this to allocate a humongous region is " |
554 "when we are allocating a single humongous region"); | |
555 | |
556 HeapRegion* res; | |
557 if (G1StressConcRegionFreeing) { | |
558 if (!_secondary_free_list.is_empty()) { | |
559 if (G1ConcRegionFreeingVerbose) { | |
560 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
561 "forced to look at the secondary_free_list"); | |
562 } | |
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563 res = new_region_try_secondary_free_list(is_old); |
2152 | 564 if (res != NULL) { |
565 return res; | |
566 } | |
567 } | |
568 } | |
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569 |
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570 res = _free_list.remove_region(is_old); |
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571 |
2152 | 572 if (res == NULL) { |
573 if (G1ConcRegionFreeingVerbose) { | |
574 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
575 "res == NULL, trying the secondary_free_list"); | |
576 } | |
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577 res = new_region_try_secondary_free_list(is_old); |
2152 | 578 } |
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579 if (res == NULL && do_expand && _expand_heap_after_alloc_failure) { |
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580 // Currently, only attempts to allocate GC alloc regions set |
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581 // do_expand to true. So, we should only reach here during a |
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582 // safepoint. If this assumption changes we might have to |
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583 // reconsider the use of _expand_heap_after_alloc_failure. |
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584 assert(SafepointSynchronize::is_at_safepoint(), "invariant"); |
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585 |
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586 ergo_verbose1(ErgoHeapSizing, |
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587 "attempt heap expansion", |
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588 ergo_format_reason("region allocation request failed") |
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589 ergo_format_byte("allocation request"), |
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590 word_size * HeapWordSize); |
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591 if (expand(word_size * HeapWordSize)) { |
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592 // Given that expand() succeeded in expanding the heap, and we |
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593 // always expand the heap by an amount aligned to the heap |
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594 // region size, the free list should in theory not be empty. |
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595 // In either case remove_region() will check for NULL. |
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596 res = _free_list.remove_region(is_old); |
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597 } else { |
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598 _expand_heap_after_alloc_failure = false; |
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599 } |
342 | 600 } |
601 return res; | |
602 } | |
603 | |
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604 uint G1CollectedHeap::humongous_obj_allocate_find_first(uint num_regions, |
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605 size_t word_size) { |
2361 | 606 assert(isHumongous(word_size), "word_size should be humongous"); |
607 assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); | |
608 | |
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609 uint first = G1_NULL_HRS_INDEX; |
2152 | 610 if (num_regions == 1) { |
611 // Only one region to allocate, no need to go through the slower | |
10405 | 612 // path. The caller will attempt the expansion if this fails, so |
2152 | 613 // let's not try to expand here too. |
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614 HeapRegion* hr = new_region(word_size, true /* is_old */, false /* do_expand */); |
2152 | 615 if (hr != NULL) { |
616 first = hr->hrs_index(); | |
617 } else { | |
3766 | 618 first = G1_NULL_HRS_INDEX; |
2152 | 619 } |
620 } else { | |
621 // We can't allocate humongous regions while cleanupComplete() is | |
622 // running, since some of the regions we find to be empty might not | |
623 // yet be added to the free list and it is not straightforward to | |
624 // know which list they are on so that we can remove them. Note | |
625 // that we only need to do this if we need to allocate more than | |
626 // one region to satisfy the current humongous allocation | |
627 // request. If we are only allocating one region we use the common | |
628 // region allocation code (see above). | |
629 wait_while_free_regions_coming(); | |
2361 | 630 append_secondary_free_list_if_not_empty_with_lock(); |
2152 | 631 |
632 if (free_regions() >= num_regions) { | |
3766 | 633 first = _hrs.find_contiguous(num_regions); |
634 if (first != G1_NULL_HRS_INDEX) { | |
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635 for (uint i = first; i < first + num_regions; ++i) { |
3766 | 636 HeapRegion* hr = region_at(i); |
2152 | 637 assert(hr->is_empty(), "sanity"); |
2361 | 638 assert(is_on_master_free_list(hr), "sanity"); |
2152 | 639 hr->set_pending_removal(true); |
640 } | |
641 _free_list.remove_all_pending(num_regions); | |
642 } | |
643 } | |
644 } | |
645 return first; | |
646 } | |
647 | |
2361 | 648 HeapWord* |
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649 G1CollectedHeap::humongous_obj_allocate_initialize_regions(uint first, |
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650 uint num_regions, |
2361 | 651 size_t word_size) { |
3766 | 652 assert(first != G1_NULL_HRS_INDEX, "pre-condition"); |
2361 | 653 assert(isHumongous(word_size), "word_size should be humongous"); |
654 assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); | |
655 | |
656 // Index of last region in the series + 1. | |
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657 uint last = first + num_regions; |
2361 | 658 |
659 // We need to initialize the region(s) we just discovered. This is | |
660 // a bit tricky given that it can happen concurrently with | |
661 // refinement threads refining cards on these regions and | |
662 // potentially wanting to refine the BOT as they are scanning | |
663 // those cards (this can happen shortly after a cleanup; see CR | |
664 // 6991377). So we have to set up the region(s) carefully and in | |
665 // a specific order. | |
666 | |
667 // The word size sum of all the regions we will allocate. | |
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668 size_t word_size_sum = (size_t) num_regions * HeapRegion::GrainWords; |
2361 | 669 assert(word_size <= word_size_sum, "sanity"); |
670 | |
671 // This will be the "starts humongous" region. | |
3766 | 672 HeapRegion* first_hr = region_at(first); |
2361 | 673 // The header of the new object will be placed at the bottom of |
674 // the first region. | |
675 HeapWord* new_obj = first_hr->bottom(); | |
676 // This will be the new end of the first region in the series that | |
10405 | 677 // should also match the end of the last region in the series. |
2361 | 678 HeapWord* new_end = new_obj + word_size_sum; |
679 // This will be the new top of the first region that will reflect | |
680 // this allocation. | |
681 HeapWord* new_top = new_obj + word_size; | |
682 | |
683 // First, we need to zero the header of the space that we will be | |
684 // allocating. When we update top further down, some refinement | |
685 // threads might try to scan the region. By zeroing the header we | |
686 // ensure that any thread that will try to scan the region will | |
687 // come across the zero klass word and bail out. | |
688 // | |
689 // NOTE: It would not have been correct to have used | |
690 // CollectedHeap::fill_with_object() and make the space look like | |
691 // an int array. The thread that is doing the allocation will | |
692 // later update the object header to a potentially different array | |
693 // type and, for a very short period of time, the klass and length | |
694 // fields will be inconsistent. This could cause a refinement | |
695 // thread to calculate the object size incorrectly. | |
696 Copy::fill_to_words(new_obj, oopDesc::header_size(), 0); | |
697 | |
698 // We will set up the first region as "starts humongous". This | |
699 // will also update the BOT covering all the regions to reflect | |
700 // that there is a single object that starts at the bottom of the | |
701 // first region. | |
702 first_hr->set_startsHumongous(new_top, new_end); | |
703 | |
704 // Then, if there are any, we will set up the "continues | |
705 // humongous" regions. | |
706 HeapRegion* hr = NULL; | |
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707 for (uint i = first + 1; i < last; ++i) { |
3766 | 708 hr = region_at(i); |
2361 | 709 hr->set_continuesHumongous(first_hr); |
710 } | |
711 // If we have "continues humongous" regions (hr != NULL), then the | |
712 // end of the last one should match new_end. | |
713 assert(hr == NULL || hr->end() == new_end, "sanity"); | |
714 | |
715 // Up to this point no concurrent thread would have been able to | |
716 // do any scanning on any region in this series. All the top | |
717 // fields still point to bottom, so the intersection between | |
718 // [bottom,top] and [card_start,card_end] will be empty. Before we | |
719 // update the top fields, we'll do a storestore to make sure that | |
720 // no thread sees the update to top before the zeroing of the | |
721 // object header and the BOT initialization. | |
722 OrderAccess::storestore(); | |
723 | |
724 // Now that the BOT and the object header have been initialized, | |
725 // we can update top of the "starts humongous" region. | |
726 assert(first_hr->bottom() < new_top && new_top <= first_hr->end(), | |
727 "new_top should be in this region"); | |
728 first_hr->set_top(new_top); | |
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729 if (_hr_printer.is_active()) { |
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730 HeapWord* bottom = first_hr->bottom(); |
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731 HeapWord* end = first_hr->orig_end(); |
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732 if ((first + 1) == last) { |
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733 // the series has a single humongous region |
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734 _hr_printer.alloc(G1HRPrinter::SingleHumongous, first_hr, new_top); |
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735 } else { |
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736 // the series has more than one humongous regions |
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737 _hr_printer.alloc(G1HRPrinter::StartsHumongous, first_hr, end); |
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738 } |
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739 } |
2361 | 740 |
741 // Now, we will update the top fields of the "continues humongous" | |
742 // regions. The reason we need to do this is that, otherwise, | |
743 // these regions would look empty and this will confuse parts of | |
744 // G1. For example, the code that looks for a consecutive number | |
745 // of empty regions will consider them empty and try to | |
746 // re-allocate them. We can extend is_empty() to also include | |
747 // !continuesHumongous(), but it is easier to just update the top | |
748 // fields here. The way we set top for all regions (i.e., top == | |
749 // end for all regions but the last one, top == new_top for the | |
750 // last one) is actually used when we will free up the humongous | |
751 // region in free_humongous_region(). | |
752 hr = NULL; | |
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753 for (uint i = first + 1; i < last; ++i) { |
3766 | 754 hr = region_at(i); |
2361 | 755 if ((i + 1) == last) { |
756 // last continues humongous region | |
757 assert(hr->bottom() < new_top && new_top <= hr->end(), | |
758 "new_top should fall on this region"); | |
759 hr->set_top(new_top); | |
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760 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, new_top); |
2361 | 761 } else { |
762 // not last one | |
763 assert(new_top > hr->end(), "new_top should be above this region"); | |
764 hr->set_top(hr->end()); | |
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765 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, hr->end()); |
2361 | 766 } |
767 } | |
768 // If we have continues humongous regions (hr != NULL), then the | |
769 // end of the last one should match new_end and its top should | |
770 // match new_top. | |
771 assert(hr == NULL || | |
772 (hr->end() == new_end && hr->top() == new_top), "sanity"); | |
773 | |
774 assert(first_hr->used() == word_size * HeapWordSize, "invariant"); | |
775 _summary_bytes_used += first_hr->used(); | |
776 _humongous_set.add(first_hr); | |
777 | |
778 return new_obj; | |
779 } | |
780 | |
342 | 781 // If could fit into free regions w/o expansion, try. |
782 // Otherwise, if can expand, do so. | |
783 // Otherwise, if using ex regions might help, try with ex given back. | |
1973 | 784 HeapWord* G1CollectedHeap::humongous_obj_allocate(size_t word_size) { |
2152 | 785 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
786 | |
787 verify_region_sets_optional(); | |
342 | 788 |
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789 size_t word_size_rounded = round_to(word_size, HeapRegion::GrainWords); |
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790 uint num_regions = (uint) (word_size_rounded / HeapRegion::GrainWords); |
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791 uint x_num = expansion_regions(); |
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792 uint fs = _hrs.free_suffix(); |
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793 uint first = humongous_obj_allocate_find_first(num_regions, word_size); |
3766 | 794 if (first == G1_NULL_HRS_INDEX) { |
2152 | 795 // The only thing we can do now is attempt expansion. |
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796 if (fs + x_num >= num_regions) { |
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797 // If the number of regions we're trying to allocate for this |
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798 // object is at most the number of regions in the free suffix, |
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799 // then the call to humongous_obj_allocate_find_first() above |
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800 // should have succeeded and we wouldn't be here. |
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801 // |
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802 // We should only be trying to expand when the free suffix is |
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803 // not sufficient for the object _and_ we have some expansion |
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804 // room available. |
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805 assert(num_regions > fs, "earlier allocation should have succeeded"); |
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806 |
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807 ergo_verbose1(ErgoHeapSizing, |
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808 "attempt heap expansion", |
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809 ergo_format_reason("humongous allocation request failed") |
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810 ergo_format_byte("allocation request"), |
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811 word_size * HeapWordSize); |
2188
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812 if (expand((num_regions - fs) * HeapRegion::GrainBytes)) { |
3766 | 813 // Even though the heap was expanded, it might not have |
814 // reached the desired size. So, we cannot assume that the | |
815 // allocation will succeed. | |
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816 first = humongous_obj_allocate_find_first(num_regions, word_size); |
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817 } |
2152 | 818 } |
819 } | |
820 | |
2361 | 821 HeapWord* result = NULL; |
3766 | 822 if (first != G1_NULL_HRS_INDEX) { |
2361 | 823 result = |
824 humongous_obj_allocate_initialize_regions(first, num_regions, word_size); | |
825 assert(result != NULL, "it should always return a valid result"); | |
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826 |
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827 // A successful humongous object allocation changes the used space |
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828 // information of the old generation so we need to recalculate the |
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829 // sizes and update the jstat counters here. |
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830 g1mm()->update_sizes(); |
2152 | 831 } |
832 | |
833 verify_region_sets_optional(); | |
2361 | 834 |
835 return result; | |
342 | 836 } |
837 | |
1973 | 838 HeapWord* G1CollectedHeap::allocate_new_tlab(size_t word_size) { |
839 assert_heap_not_locked_and_not_at_safepoint(); | |
2433
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840 assert(!isHumongous(word_size), "we do not allow humongous TLABs"); |
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841 |
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842 unsigned int dummy_gc_count_before; |
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843 int dummy_gclocker_retry_count = 0; |
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844 return attempt_allocation(word_size, &dummy_gc_count_before, &dummy_gclocker_retry_count); |
342 | 845 } |
846 | |
847 HeapWord* | |
848 G1CollectedHeap::mem_allocate(size_t word_size, | |
1973 | 849 bool* gc_overhead_limit_was_exceeded) { |
850 assert_heap_not_locked_and_not_at_safepoint(); | |
342 | 851 |
10405 | 852 // Loop until the allocation is satisfied, or unsatisfied after GC. |
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853 for (int try_count = 1, gclocker_retry_count = 0; /* we'll return */; try_count += 1) { |
1973 | 854 unsigned int gc_count_before; |
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855 |
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856 HeapWord* result = NULL; |
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857 if (!isHumongous(word_size)) { |
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858 result = attempt_allocation(word_size, &gc_count_before, &gclocker_retry_count); |
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859 } else { |
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860 result = attempt_allocation_humongous(word_size, &gc_count_before, &gclocker_retry_count); |
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861 } |
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862 if (result != NULL) { |
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863 return result; |
342 | 864 } |
865 | |
866 // Create the garbage collection operation... | |
1973 | 867 VM_G1CollectForAllocation op(gc_count_before, word_size); |
342 | 868 // ...and get the VM thread to execute it. |
869 VMThread::execute(&op); | |
1973 | 870 |
871 if (op.prologue_succeeded() && op.pause_succeeded()) { | |
872 // If the operation was successful we'll return the result even | |
873 // if it is NULL. If the allocation attempt failed immediately | |
874 // after a Full GC, it's unlikely we'll be able to allocate now. | |
875 HeapWord* result = op.result(); | |
876 if (result != NULL && !isHumongous(word_size)) { | |
877 // Allocations that take place on VM operations do not do any | |
878 // card dirtying and we have to do it here. We only have to do | |
879 // this for non-humongous allocations, though. | |
880 dirty_young_block(result, word_size); | |
881 } | |
342 | 882 return result; |
1973 | 883 } else { |
8853
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884 if (gclocker_retry_count > GCLockerRetryAllocationCount) { |
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885 return NULL; |
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886 } |
1973 | 887 assert(op.result() == NULL, |
888 "the result should be NULL if the VM op did not succeed"); | |
342 | 889 } |
890 | |
891 // Give a warning if we seem to be looping forever. | |
892 if ((QueuedAllocationWarningCount > 0) && | |
893 (try_count % QueuedAllocationWarningCount == 0)) { | |
1973 | 894 warning("G1CollectedHeap::mem_allocate retries %d times", try_count); |
342 | 895 } |
896 } | |
1973 | 897 |
898 ShouldNotReachHere(); | |
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899 return NULL; |
342 | 900 } |
901 | |
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902 HeapWord* G1CollectedHeap::attempt_allocation_slow(size_t word_size, |
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903 unsigned int *gc_count_before_ret, |
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904 int* gclocker_retry_count_ret) { |
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905 // Make sure you read the note in attempt_allocation_humongous(). |
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906 |
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907 assert_heap_not_locked_and_not_at_safepoint(); |
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908 assert(!isHumongous(word_size), "attempt_allocation_slow() should not " |
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909 "be called for humongous allocation requests"); |
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910 |
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911 // We should only get here after the first-level allocation attempt |
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912 // (attempt_allocation()) failed to allocate. |
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913 |
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914 // We will loop until a) we manage to successfully perform the |
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915 // allocation or b) we successfully schedule a collection which |
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916 // fails to perform the allocation. b) is the only case when we'll |
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917 // return NULL. |
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918 HeapWord* result = NULL; |
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919 for (int try_count = 1; /* we'll return */; try_count += 1) { |
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920 bool should_try_gc; |
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921 unsigned int gc_count_before; |
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922 |
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923 { |
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924 MutexLockerEx x(Heap_lock); |
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925 |
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926 result = _mutator_alloc_region.attempt_allocation_locked(word_size, |
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927 false /* bot_updates */); |
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928 if (result != NULL) { |
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929 return result; |
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930 } |
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931 |
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932 // If we reach here, attempt_allocation_locked() above failed to |
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933 // allocate a new region. So the mutator alloc region should be NULL. |
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934 assert(_mutator_alloc_region.get() == NULL, "only way to get here"); |
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935 |
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936 if (GC_locker::is_active_and_needs_gc()) { |
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937 if (g1_policy()->can_expand_young_list()) { |
3914
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938 // No need for an ergo verbose message here, |
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939 // can_expand_young_list() does this when it returns true. |
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940 result = _mutator_alloc_region.attempt_allocation_force(word_size, |
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941 false /* bot_updates */); |
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942 if (result != NULL) { |
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|
943 return result; |
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|
944 } |
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|
945 } |
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946 should_try_gc = false; |
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947 } else { |
6106
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948 // The GCLocker may not be active but the GCLocker initiated |
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949 // GC may not yet have been performed (GCLocker::needs_gc() |
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950 // returns true). In this case we do not try this GC and |
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951 // wait until the GCLocker initiated GC is performed, and |
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952 // then retry the allocation. |
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953 if (GC_locker::needs_gc()) { |
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954 should_try_gc = false; |
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955 } else { |
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956 // Read the GC count while still holding the Heap_lock. |
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957 gc_count_before = total_collections(); |
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958 should_try_gc = true; |
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959 } |
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960 } |
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961 } |
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962 |
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963 if (should_try_gc) { |
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964 bool succeeded; |
12113
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965 result = do_collection_pause(word_size, gc_count_before, &succeeded, |
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966 GCCause::_g1_inc_collection_pause); |
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967 if (result != NULL) { |
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968 assert(succeeded, "only way to get back a non-NULL result"); |
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969 return result; |
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970 } |
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971 |
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972 if (succeeded) { |
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973 // If we get here we successfully scheduled a collection which |
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974 // failed to allocate. No point in trying to allocate |
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975 // further. We'll just return NULL. |
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976 MutexLockerEx x(Heap_lock); |
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977 *gc_count_before_ret = total_collections(); |
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978 return NULL; |
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979 } |
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980 } else { |
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981 if (*gclocker_retry_count_ret > GCLockerRetryAllocationCount) { |
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982 MutexLockerEx x(Heap_lock); |
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983 *gc_count_before_ret = total_collections(); |
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984 return NULL; |
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|
985 } |
6106
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986 // The GCLocker is either active or the GCLocker initiated |
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987 // GC has not yet been performed. Stall until it is and |
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988 // then retry the allocation. |
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989 GC_locker::stall_until_clear(); |
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990 (*gclocker_retry_count_ret) += 1; |
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|
991 } |
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|
992 |
10405 | 993 // We can reach here if we were unsuccessful in scheduling a |
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994 // collection (because another thread beat us to it) or if we were |
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995 // stalled due to the GC locker. In either can we should retry the |
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996 // allocation attempt in case another thread successfully |
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997 // performed a collection and reclaimed enough space. We do the |
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998 // first attempt (without holding the Heap_lock) here and the |
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999 // follow-on attempt will be at the start of the next loop |
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|
1000 // iteration (after taking the Heap_lock). |
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|
1001 result = _mutator_alloc_region.attempt_allocation(word_size, |
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1002 false /* bot_updates */); |
5963
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7147724: G1: hang in SurrogateLockerThread::manipulatePLL
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4912
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|
1003 if (result != NULL) { |
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|
1004 return result; |
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1005 } |
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1006 |
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1007 // Give a warning if we seem to be looping forever. |
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1008 if ((QueuedAllocationWarningCount > 0) && |
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1009 (try_count % QueuedAllocationWarningCount == 0)) { |
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1010 warning("G1CollectedHeap::attempt_allocation_slow() " |
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1011 "retries %d times", try_count); |
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1012 } |
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1013 } |
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1014 |
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|
1015 ShouldNotReachHere(); |
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1016 return NULL; |
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|
1017 } |
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|
1018 |
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1019 HeapWord* G1CollectedHeap::attempt_allocation_humongous(size_t word_size, |
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1020 unsigned int * gc_count_before_ret, |
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1021 int* gclocker_retry_count_ret) { |
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1022 // The structure of this method has a lot of similarities to |
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1023 // attempt_allocation_slow(). The reason these two were not merged |
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1024 // into a single one is that such a method would require several "if |
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1025 // allocation is not humongous do this, otherwise do that" |
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1026 // conditional paths which would obscure its flow. In fact, an early |
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1027 // version of this code did use a unified method which was harder to |
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1028 // follow and, as a result, it had subtle bugs that were hard to |
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1029 // track down. So keeping these two methods separate allows each to |
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1030 // be more readable. It will be good to keep these two in sync as |
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1031 // much as possible. |
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|
1032 |
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1033 assert_heap_not_locked_and_not_at_safepoint(); |
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1034 assert(isHumongous(word_size), "attempt_allocation_humongous() " |
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1035 "should only be called for humongous allocations"); |
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|
1036 |
4834
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1037 // Humongous objects can exhaust the heap quickly, so we should check if we |
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|
1038 // need to start a marking cycle at each humongous object allocation. We do |
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1039 // the check before we do the actual allocation. The reason for doing it |
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1040 // before the allocation is that we avoid having to keep track of the newly |
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1041 // allocated memory while we do a GC. |
4910
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1042 if (g1_policy()->need_to_start_conc_mark("concurrent humongous allocation", |
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1043 word_size)) { |
4834
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1044 collect(GCCause::_g1_humongous_allocation); |
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1045 } |
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|
1046 |
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1047 // We will loop until a) we manage to successfully perform the |
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1048 // allocation or b) we successfully schedule a collection which |
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1049 // fails to perform the allocation. b) is the only case when we'll |
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1050 // return NULL. |
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1051 HeapWord* result = NULL; |
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1052 for (int try_count = 1; /* we'll return */; try_count += 1) { |
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|
1053 bool should_try_gc; |
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|
1054 unsigned int gc_count_before; |
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|
1055 |
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1056 { |
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1057 MutexLockerEx x(Heap_lock); |
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1058 |
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1059 // Given that humongous objects are not allocated in young |
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1060 // regions, we'll first try to do the allocation without doing a |
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1061 // collection hoping that there's enough space in the heap. |
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1062 result = humongous_obj_allocate(word_size); |
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1063 if (result != NULL) { |
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1064 return result; |
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1065 } |
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|
1066 |
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1067 if (GC_locker::is_active_and_needs_gc()) { |
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1068 should_try_gc = false; |
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1069 } else { |
6106
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1070 // The GCLocker may not be active but the GCLocker initiated |
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1071 // GC may not yet have been performed (GCLocker::needs_gc() |
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1072 // returns true). In this case we do not try this GC and |
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1073 // wait until the GCLocker initiated GC is performed, and |
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1074 // then retry the allocation. |
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1075 if (GC_locker::needs_gc()) { |
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1076 should_try_gc = false; |
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1077 } else { |
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1078 // Read the GC count while still holding the Heap_lock. |
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1079 gc_count_before = total_collections(); |
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1080 should_try_gc = true; |
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1081 } |
2433
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1082 } |
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1083 } |
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1084 |
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1085 if (should_try_gc) { |
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1086 // If we failed to allocate the humongous object, we should try to |
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1087 // do a collection pause (if we're allowed) in case it reclaims |
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1088 // enough space for the allocation to succeed after the pause. |
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1089 |
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1090 bool succeeded; |
12113
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1091 result = do_collection_pause(word_size, gc_count_before, &succeeded, |
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1092 GCCause::_g1_humongous_allocation); |
2433
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1093 if (result != NULL) { |
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1094 assert(succeeded, "only way to get back a non-NULL result"); |
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1095 return result; |
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1096 } |
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1097 |
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1098 if (succeeded) { |
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1099 // If we get here we successfully scheduled a collection which |
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1100 // failed to allocate. No point in trying to allocate |
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1101 // further. We'll just return NULL. |
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1102 MutexLockerEx x(Heap_lock); |
4910
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1103 *gc_count_before_ret = total_collections(); |
2433
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1104 return NULL; |
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|
1105 } |
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1106 } else { |
8853
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1107 if (*gclocker_retry_count_ret > GCLockerRetryAllocationCount) { |
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1108 MutexLockerEx x(Heap_lock); |
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1109 *gc_count_before_ret = total_collections(); |
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1110 return NULL; |
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1111 } |
6106
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1112 // The GCLocker is either active or the GCLocker initiated |
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1113 // GC has not yet been performed. Stall until it is and |
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1114 // then retry the allocation. |
2433
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1115 GC_locker::stall_until_clear(); |
8853
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1116 (*gclocker_retry_count_ret) += 1; |
2433
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1117 } |
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|
1118 |
10405 | 1119 // We can reach here if we were unsuccessful in scheduling a |
2433
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1120 // collection (because another thread beat us to it) or if we were |
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1121 // stalled due to the GC locker. In either can we should retry the |
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1122 // allocation attempt in case another thread successfully |
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1123 // performed a collection and reclaimed enough space. Give a |
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1124 // warning if we seem to be looping forever. |
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1125 |
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1126 if ((QueuedAllocationWarningCount > 0) && |
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1127 (try_count % QueuedAllocationWarningCount == 0)) { |
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1128 warning("G1CollectedHeap::attempt_allocation_humongous() " |
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1129 "retries %d times", try_count); |
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1130 } |
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1131 } |
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|
1132 |
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|
1133 ShouldNotReachHere(); |
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1134 return NULL; |
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|
1135 } |
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|
1136 |
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1137 HeapWord* G1CollectedHeap::attempt_allocation_at_safepoint(size_t word_size, |
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1138 bool expect_null_mutator_alloc_region) { |
2152 | 1139 assert_at_safepoint(true /* should_be_vm_thread */); |
2433
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1140 assert(_mutator_alloc_region.get() == NULL || |
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1141 !expect_null_mutator_alloc_region, |
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1142 "the current alloc region was unexpectedly found to be non-NULL"); |
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1143 |
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1144 if (!isHumongous(word_size)) { |
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1145 return _mutator_alloc_region.attempt_allocation_locked(word_size, |
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1146 false /* bot_updates */); |
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|
1147 } else { |
4829
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|
1148 HeapWord* result = humongous_obj_allocate(word_size); |
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1149 if (result != NULL && g1_policy()->need_to_start_conc_mark("STW humongous allocation")) { |
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1150 g1_policy()->set_initiate_conc_mark_if_possible(); |
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|
1151 } |
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|
1152 return result; |
2433
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|
1153 } |
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1154 |
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1155 ShouldNotReachHere(); |
342 | 1156 } |
1157 | |
1158 class PostMCRemSetClearClosure: public HeapRegionClosure { | |
6254
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1159 G1CollectedHeap* _g1h; |
342 | 1160 ModRefBarrierSet* _mr_bs; |
1161 public: | |
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1162 PostMCRemSetClearClosure(G1CollectedHeap* g1h, ModRefBarrierSet* mr_bs) : |
12080 | 1163 _g1h(g1h), _mr_bs(mr_bs) {} |
1164 | |
342 | 1165 bool doHeapRegion(HeapRegion* r) { |
12080 | 1166 HeapRegionRemSet* hrrs = r->rem_set(); |
1167 | |
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1168 if (r->continuesHumongous()) { |
12080 | 1169 // We'll assert that the strong code root list and RSet is empty |
1170 assert(hrrs->strong_code_roots_list_length() == 0, "sanity"); | |
1171 assert(hrrs->occupied() == 0, "RSet should be empty"); | |
342 | 1172 return false; |
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1173 } |
12080 | 1174 |
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1175 _g1h->reset_gc_time_stamps(r); |
12080 | 1176 hrrs->clear(); |
342 | 1177 // You might think here that we could clear just the cards |
1178 // corresponding to the used region. But no: if we leave a dirty card | |
1179 // in a region we might allocate into, then it would prevent that card | |
1180 // from being enqueued, and cause it to be missed. | |
1181 // Re: the performance cost: we shouldn't be doing full GC anyway! | |
1182 _mr_bs->clear(MemRegion(r->bottom(), r->end())); | |
12080 | 1183 |
342 | 1184 return false; |
1185 } | |
1186 }; | |
1187 | |
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1188 void G1CollectedHeap::clear_rsets_post_compaction() { |
12343 | 1189 PostMCRemSetClearClosure rs_clear(this, g1_barrier_set()); |
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1190 heap_region_iterate(&rs_clear); |
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1191 } |
342 | 1192 |
626
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1193 class RebuildRSOutOfRegionClosure: public HeapRegionClosure { |
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1194 G1CollectedHeap* _g1h; |
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1195 UpdateRSOopClosure _cl; |
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|
1196 int _worker_i; |
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|
1197 public: |
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|
1198 RebuildRSOutOfRegionClosure(G1CollectedHeap* g1, int worker_i = 0) : |
1861 | 1199 _cl(g1->g1_rem_set(), worker_i), |
626
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1200 _worker_i(worker_i), |
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1201 _g1h(g1) |
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1202 { } |
1960
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|
1203 |
626
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1204 bool doHeapRegion(HeapRegion* r) { |
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1205 if (!r->continuesHumongous()) { |
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1206 _cl.set_from(r); |
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1207 r->oop_iterate(&_cl); |
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1208 } |
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1209 return false; |
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1210 } |
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1211 }; |
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1212 |
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1213 class ParRebuildRSTask: public AbstractGangTask { |
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1214 G1CollectedHeap* _g1; |
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1215 public: |
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1216 ParRebuildRSTask(G1CollectedHeap* g1) |
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1217 : AbstractGangTask("ParRebuildRSTask"), |
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1218 _g1(g1) |
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1219 { } |
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1220 |
4728
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1221 void work(uint worker_id) { |
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1222 RebuildRSOutOfRegionClosure rebuild_rs(_g1, worker_id); |
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1223 _g1->heap_region_par_iterate_chunked(&rebuild_rs, worker_id, |
4095
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1224 _g1->workers()->active_workers(), |
626
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1225 HeapRegion::RebuildRSClaimValue); |
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1226 } |
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1227 }; |
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1228 |
3778
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1229 class PostCompactionPrinterClosure: public HeapRegionClosure { |
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1230 private: |
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1231 G1HRPrinter* _hr_printer; |
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1232 public: |
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1233 bool doHeapRegion(HeapRegion* hr) { |
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1234 assert(!hr->is_young(), "not expecting to find young regions"); |
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1235 // We only generate output for non-empty regions. |
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1236 if (!hr->is_empty()) { |
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1237 if (!hr->isHumongous()) { |
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1238 _hr_printer->post_compaction(hr, G1HRPrinter::Old); |
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1239 } else if (hr->startsHumongous()) { |
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1240 if (hr->region_num() == 1) { |
3778
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1241 // single humongous region |
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1242 _hr_printer->post_compaction(hr, G1HRPrinter::SingleHumongous); |
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1243 } else { |
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1244 _hr_printer->post_compaction(hr, G1HRPrinter::StartsHumongous); |
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1245 } |
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1246 } else { |
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1247 assert(hr->continuesHumongous(), "only way to get here"); |
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1248 _hr_printer->post_compaction(hr, G1HRPrinter::ContinuesHumongous); |
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1249 } |
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1250 } |
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1251 return false; |
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1252 } |
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1253 |
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1254 PostCompactionPrinterClosure(G1HRPrinter* hr_printer) |
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1255 : _hr_printer(hr_printer) { } |
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1256 }; |
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1257 |
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1258 void G1CollectedHeap::print_hrs_post_compaction() { |
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1259 PostCompactionPrinterClosure cl(hr_printer()); |
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1260 heap_region_iterate(&cl); |
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1261 } |
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1262 |
1973 | 1263 bool G1CollectedHeap::do_collection(bool explicit_gc, |
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1264 bool clear_all_soft_refs, |
342 | 1265 size_t word_size) { |
2152 | 1266 assert_at_safepoint(true /* should_be_vm_thread */); |
1267 | |
1359
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1268 if (GC_locker::check_active_before_gc()) { |
1973 | 1269 return false; |
1359
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1270 } |
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1271 |
10405 | 1272 STWGCTimer* gc_timer = G1MarkSweep::gc_timer(); |
13400
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1273 gc_timer->register_gc_start(); |
10405 | 1274 |
1275 SerialOldTracer* gc_tracer = G1MarkSweep::gc_tracer(); | |
1276 gc_tracer->report_gc_start(gc_cause(), gc_timer->gc_start()); | |
1277 | |
2125
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1278 SvcGCMarker sgcm(SvcGCMarker::FULL); |
342 | 1279 ResourceMark rm; |
1280 | |
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1281 print_heap_before_gc(); |
10405 | 1282 trace_heap_before_gc(gc_tracer); |
838
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1283 |
17866
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1284 size_t metadata_prev_used = MetaspaceAux::used_bytes(); |
6725
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1285 |
2152 | 1286 verify_region_sets_optional(); |
342 | 1287 |
1387
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1288 const bool do_clear_all_soft_refs = clear_all_soft_refs || |
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1289 collector_policy()->should_clear_all_soft_refs(); |
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1290 |
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1291 ClearedAllSoftRefs casr(do_clear_all_soft_refs, collector_policy()); |
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1292 |
342 | 1293 { |
1294 IsGCActiveMark x; | |
1295 | |
1296 // Timing | |
6030 | 1297 assert(gc_cause() != GCCause::_java_lang_system_gc || explicit_gc, "invariant"); |
6007
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1298 gclog_or_tty->date_stamp(G1Log::fine() && PrintGCDateStamps); |
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1299 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
6030 | 1300 |
342 | 1301 { |
20190
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8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
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1302 GCTraceTime t(GCCauseString("Full GC", gc_cause()), G1Log::fine(), true, NULL, gc_tracer->gc_id()); |
10098
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1303 TraceCollectorStats tcs(g1mm()->full_collection_counters()); |
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1304 TraceMemoryManagerStats tms(true /* fullGC */, gc_cause()); |
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1305 |
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1306 double start = os::elapsedTime(); |
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1307 g1_policy()->record_full_collection_start(); |
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1308 |
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1309 // Note: When we have a more flexible GC logging framework that |
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1310 // allows us to add optional attributes to a GC log record we |
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1311 // could consider timing and reporting how long we wait in the |
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1312 // following two methods. |
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1313 wait_while_free_regions_coming(); |
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1314 // If we start the compaction before the CM threads finish |
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1315 // scanning the root regions we might trip them over as we'll |
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1316 // be moving objects / updating references. So let's wait until |
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1317 // they are done. By telling them to abort, they should complete |
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1318 // early. |
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1319 _cm->root_regions()->abort(); |
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1320 _cm->root_regions()->wait_until_scan_finished(); |
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1321 append_secondary_free_list_if_not_empty_with_lock(); |
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1322 |
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1323 gc_prologue(true); |
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1324 increment_total_collections(true /* full gc */); |
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1325 increment_old_marking_cycles_started(); |
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1326 |
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1327 assert(used() == recalculate_used(), "Should be equal"); |
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1328 |
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1329 verify_before_gc(); |
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1330 |
10405 | 1331 pre_full_gc_dump(gc_timer); |
10098
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1332 |
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1333 COMPILER2_PRESENT(DerivedPointerTable::clear()); |
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1334 |
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1335 // Disable discovery and empty the discovered lists |
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1336 // for the CM ref processor. |
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1337 ref_processor_cm()->disable_discovery(); |
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1338 ref_processor_cm()->abandon_partial_discovery(); |
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1339 ref_processor_cm()->verify_no_references_recorded(); |
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1340 |
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1341 // Abandon current iterations of concurrent marking and concurrent |
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1342 // refinement, if any are in progress. We have to do this before |
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1343 // wait_until_scan_finished() below. |
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1344 concurrent_mark()->abort(); |
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1345 |
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1346 // Make sure we'll choose a new allocation region afterwards. |
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1347 release_mutator_alloc_region(); |
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1348 abandon_gc_alloc_regions(); |
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1349 g1_rem_set()->cleanupHRRS(); |
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|
1350 |
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1351 // We should call this after we retire any currently active alloc |
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1352 // regions so that all the ALLOC / RETIRE events are generated |
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1353 // before the start GC event. |
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1354 _hr_printer.start_gc(true /* full */, (size_t) total_collections()); |
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|
1355 |
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1356 // We may have added regions to the current incremental collection |
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1357 // set between the last GC or pause and now. We need to clear the |
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1358 // incremental collection set and then start rebuilding it afresh |
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1359 // after this full GC. |
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1360 abandon_collection_set(g1_policy()->inc_cset_head()); |
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1361 g1_policy()->clear_incremental_cset(); |
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1362 g1_policy()->stop_incremental_cset_building(); |
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1363 |
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1364 tear_down_region_sets(false /* free_list_only */); |
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1365 g1_policy()->set_gcs_are_young(true); |
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1366 |
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1367 // See the comments in g1CollectedHeap.hpp and |
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1368 // G1CollectedHeap::ref_processing_init() about |
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1369 // how reference processing currently works in G1. |
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|
1370 |
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1371 // Temporarily make discovery by the STW ref processor single threaded (non-MT). |
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1372 ReferenceProcessorMTDiscoveryMutator stw_rp_disc_ser(ref_processor_stw(), false); |
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1373 |
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1374 // Temporarily clear the STW ref processor's _is_alive_non_header field. |
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1375 ReferenceProcessorIsAliveMutator stw_rp_is_alive_null(ref_processor_stw(), NULL); |
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|
1376 |
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1377 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, true /*verify_no_refs*/); |
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1378 ref_processor_stw()->setup_policy(do_clear_all_soft_refs); |
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|
1379 |
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|
1380 // Do collection work |
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|
1381 { |
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|
1382 HandleMark hm; // Discard invalid handles created during gc |
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1383 G1MarkSweep::invoke_at_safepoint(ref_processor_stw(), do_clear_all_soft_refs); |
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|
1384 } |
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|
1385 |
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1386 assert(free_regions() == 0, "we should not have added any free regions"); |
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|
1387 rebuild_region_sets(false /* free_list_only */); |
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|
1388 |
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1389 // Enqueue any discovered reference objects that have |
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1390 // not been removed from the discovered lists. |
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|
1391 ref_processor_stw()->enqueue_discovered_references(); |
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|
1392 |
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|
1393 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
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|
1394 |
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|
1395 MemoryService::track_memory_usage(); |
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|
1396 |
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|
1397 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
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1398 ref_processor_stw()->verify_no_references_recorded(); |
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|
1399 |
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1400 // Delete metaspaces for unloaded class loaders and clean up loader_data graph |
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|
1401 ClassLoaderDataGraph::purge(); |
12080 | 1402 MetaspaceAux::verify_metrics(); |
10098
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|
1403 |
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1404 // Note: since we've just done a full GC, concurrent |
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1405 // marking is no longer active. Therefore we need not |
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|
1406 // re-enable reference discovery for the CM ref processor. |
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1407 // That will be done at the start of the next marking cycle. |
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1408 assert(!ref_processor_cm()->discovery_enabled(), "Postcondition"); |
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|
1409 ref_processor_cm()->verify_no_references_recorded(); |
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|
1410 |
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|
1411 reset_gc_time_stamp(); |
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1412 // Since everything potentially moved, we will clear all remembered |
10405 | 1413 // sets, and clear all cards. Later we will rebuild remembered |
10098
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1414 // sets. We will also reset the GC time stamps of the regions. |
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|
1415 clear_rsets_post_compaction(); |
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|
1416 check_gc_time_stamps(); |
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|
1417 |
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|
1418 // Resize the heap if necessary. |
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|
1419 resize_if_necessary_after_full_collection(explicit_gc ? 0 : word_size); |
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|
1420 |
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|
1421 if (_hr_printer.is_active()) { |
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1422 // We should do this after we potentially resize the heap so |
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|
1423 // that all the COMMIT / UNCOMMIT events are generated before |
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|
1424 // the end GC event. |
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|
1425 |
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|
1426 print_hrs_post_compaction(); |
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|
1427 _hr_printer.end_gc(true /* full */, (size_t) total_collections()); |
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|
1428 } |
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|
1429 |
10246
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|
1430 G1HotCardCache* hot_card_cache = _cg1r->hot_card_cache(); |
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|
1431 if (hot_card_cache->use_cache()) { |
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|
1432 hot_card_cache->reset_card_counts(); |
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|
1433 hot_card_cache->reset_hot_cache(); |
10098
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|
1434 } |
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|
1435 |
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|
1436 // Rebuild remembered sets of all regions. |
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|
1437 if (G1CollectedHeap::use_parallel_gc_threads()) { |
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|
1438 uint n_workers = |
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|
1439 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
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|
1440 workers()->active_workers(), |
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|
1441 Threads::number_of_non_daemon_threads()); |
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|
1442 assert(UseDynamicNumberOfGCThreads || |
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|
1443 n_workers == workers()->total_workers(), |
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|
1444 "If not dynamic should be using all the workers"); |
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|
1445 workers()->set_active_workers(n_workers); |
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|
1446 // Set parallel threads in the heap (_n_par_threads) only |
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1447 // before a parallel phase and always reset it to 0 after |
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|
1448 // the phase so that the number of parallel threads does |
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1449 // no get carried forward to a serial phase where there |
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1450 // may be code that is "possibly_parallel". |
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|
1451 set_par_threads(n_workers); |
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|
1452 |
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|
1453 ParRebuildRSTask rebuild_rs_task(this); |
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|
1454 assert(check_heap_region_claim_values( |
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|
1455 HeapRegion::InitialClaimValue), "sanity check"); |
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|
1456 assert(UseDynamicNumberOfGCThreads || |
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|
1457 workers()->active_workers() == workers()->total_workers(), |
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|
1458 "Unless dynamic should use total workers"); |
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|
1459 // Use the most recent number of active workers |
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|
1460 assert(workers()->active_workers() > 0, |
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|
1461 "Active workers not properly set"); |
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|
1462 set_par_threads(workers()->active_workers()); |
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|
1463 workers()->run_task(&rebuild_rs_task); |
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|
1464 set_par_threads(0); |
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|
1465 assert(check_heap_region_claim_values( |
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|
1466 HeapRegion::RebuildRSClaimValue), "sanity check"); |
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|
1467 reset_heap_region_claim_values(); |
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|
1468 } else { |
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1469 RebuildRSOutOfRegionClosure rebuild_rs(this); |
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1470 heap_region_iterate(&rebuild_rs); |
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1471 } |
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1472 |
12080 | 1473 // Rebuild the strong code root lists for each region |
1474 rebuild_strong_code_roots(); | |
1475 | |
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1476 if (true) { // FIXME |
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1477 MetaspaceGC::compute_new_size(); |
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1478 } |
342 | 1479 |
546
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1480 #ifdef TRACESPINNING |
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1481 ParallelTaskTerminator::print_termination_counts(); |
546
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1482 #endif |
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1483 |
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1484 // Discard all rset updates |
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1485 JavaThread::dirty_card_queue_set().abandon_logs(); |
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1486 assert(!G1DeferredRSUpdate |
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1487 || (G1DeferredRSUpdate && |
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1488 (dirty_card_queue_set().completed_buffers_num() == 0)), "Should not be any"); |
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1489 |
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1490 _young_list->reset_sampled_info(); |
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1491 // At this point there should be no regions in the |
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1492 // entire heap tagged as young. |
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1493 assert(check_young_list_empty(true /* check_heap */), |
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1494 "young list should be empty at this point"); |
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1495 |
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1496 // Update the number of full collections that have been completed. |
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1497 increment_old_marking_cycles_completed(false /* concurrent */); |
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1498 |
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1499 _hrs.verify_optional(); |
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1500 verify_region_sets_optional(); |
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1501 |
10373
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1502 verify_after_gc(); |
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1503 |
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1504 // Start a new incremental collection set for the next pause |
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1505 assert(g1_policy()->collection_set() == NULL, "must be"); |
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1506 g1_policy()->start_incremental_cset_building(); |
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1507 |
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1508 clear_cset_fast_test(); |
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1509 |
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1510 init_mutator_alloc_region(); |
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1511 |
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1512 double end = os::elapsedTime(); |
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1513 g1_policy()->record_full_collection_end(); |
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1514 |
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1515 if (G1Log::fine()) { |
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1516 g1_policy()->print_heap_transition(); |
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1517 } |
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1518 |
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1519 // We must call G1MonitoringSupport::update_sizes() in the same scoping level |
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1520 // as an active TraceMemoryManagerStats object (i.e. before the destructor for the |
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1521 // TraceMemoryManagerStats is called) so that the G1 memory pools are updated |
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1522 // before any GC notifications are raised. |
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1523 g1mm()->update_sizes(); |
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1524 |
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1525 gc_epilogue(true); |
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1526 } |
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1527 |
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1528 if (G1Log::finer()) { |
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1529 g1_policy()->print_detailed_heap_transition(true /* full */); |
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1530 } |
6121
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1531 |
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1532 print_heap_after_gc(); |
10405 | 1533 trace_heap_after_gc(gc_tracer); |
1534 | |
1535 post_full_gc_dump(gc_timer); | |
1536 | |
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1537 gc_timer->register_gc_end(); |
10405 | 1538 gc_tracer->report_gc_end(gc_timer->gc_end(), gc_timer->time_partitions()); |
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1539 } |
1973 | 1540 |
1541 return true; | |
342 | 1542 } |
1543 | |
1544 void G1CollectedHeap::do_full_collection(bool clear_all_soft_refs) { | |
1973 | 1545 // do_collection() will return whether it succeeded in performing |
1546 // the GC. Currently, there is no facility on the | |
1547 // do_full_collection() API to notify the caller than the collection | |
1548 // did not succeed (e.g., because it was locked out by the GC | |
1549 // locker). So, right now, we'll ignore the return value. | |
1550 bool dummy = do_collection(true, /* explicit_gc */ | |
1551 clear_all_soft_refs, | |
1552 0 /* word_size */); | |
342 | 1553 } |
1554 | |
1555 // This code is mostly copied from TenuredGeneration. | |
1556 void | |
1557 G1CollectedHeap:: | |
1558 resize_if_necessary_after_full_collection(size_t word_size) { | |
1559 // Include the current allocation, if any, and bytes that will be | |
1560 // pre-allocated to support collections, as "used". | |
1561 const size_t used_after_gc = used(); | |
1562 const size_t capacity_after_gc = capacity(); | |
1563 const size_t free_after_gc = capacity_after_gc - used_after_gc; | |
1564 | |
1717
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1565 // This is enforced in arguments.cpp. |
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1566 assert(MinHeapFreeRatio <= MaxHeapFreeRatio, |
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1567 "otherwise the code below doesn't make sense"); |
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1568 |
342 | 1569 // We don't have floating point command-line arguments |
1717
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1570 const double minimum_free_percentage = (double) MinHeapFreeRatio / 100.0; |
342 | 1571 const double maximum_used_percentage = 1.0 - minimum_free_percentage; |
1717
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1572 const double maximum_free_percentage = (double) MaxHeapFreeRatio / 100.0; |
342 | 1573 const double minimum_used_percentage = 1.0 - maximum_free_percentage; |
1574 | |
1717
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1575 const size_t min_heap_size = collector_policy()->min_heap_byte_size(); |
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1576 const size_t max_heap_size = collector_policy()->max_heap_byte_size(); |
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1577 |
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1578 // We have to be careful here as these two calculations can overflow |
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1579 // 32-bit size_t's. |
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1580 double used_after_gc_d = (double) used_after_gc; |
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1581 double minimum_desired_capacity_d = used_after_gc_d / maximum_used_percentage; |
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1582 double maximum_desired_capacity_d = used_after_gc_d / minimum_used_percentage; |
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1583 |
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1584 // Let's make sure that they are both under the max heap size, which |
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1585 // by default will make them fit into a size_t. |
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1586 double desired_capacity_upper_bound = (double) max_heap_size; |
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1587 minimum_desired_capacity_d = MIN2(minimum_desired_capacity_d, |
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1588 desired_capacity_upper_bound); |
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1589 maximum_desired_capacity_d = MIN2(maximum_desired_capacity_d, |
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1590 desired_capacity_upper_bound); |
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1591 |
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1592 // We can now safely turn them into size_t's. |
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1593 size_t minimum_desired_capacity = (size_t) minimum_desired_capacity_d; |
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|
1594 size_t maximum_desired_capacity = (size_t) maximum_desired_capacity_d; |
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1595 |
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1596 // This assert only makes sense here, before we adjust them |
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1597 // with respect to the min and max heap size. |
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1598 assert(minimum_desired_capacity <= maximum_desired_capacity, |
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1599 err_msg("minimum_desired_capacity = "SIZE_FORMAT", " |
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1600 "maximum_desired_capacity = "SIZE_FORMAT, |
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1601 minimum_desired_capacity, maximum_desired_capacity)); |
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1602 |
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1603 // Should not be greater than the heap max size. No need to adjust |
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1604 // it with respect to the heap min size as it's a lower bound (i.e., |
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1605 // we'll try to make the capacity larger than it, not smaller). |
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1606 minimum_desired_capacity = MIN2(minimum_desired_capacity, max_heap_size); |
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1607 // Should not be less than the heap min size. No need to adjust it |
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1608 // with respect to the heap max size as it's an upper bound (i.e., |
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1609 // we'll try to make the capacity smaller than it, not greater). |
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1610 maximum_desired_capacity = MAX2(maximum_desired_capacity, min_heap_size); |
342 | 1611 |
1717
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1612 if (capacity_after_gc < minimum_desired_capacity) { |
342 | 1613 // Don't expand unless it's significant |
1614 size_t expand_bytes = minimum_desired_capacity - capacity_after_gc; | |
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1615 ergo_verbose4(ErgoHeapSizing, |
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1616 "attempt heap expansion", |
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1617 ergo_format_reason("capacity lower than " |
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1618 "min desired capacity after Full GC") |
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1619 ergo_format_byte("capacity") |
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1620 ergo_format_byte("occupancy") |
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1621 ergo_format_byte_perc("min desired capacity"), |
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1622 capacity_after_gc, used_after_gc, |
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1623 minimum_desired_capacity, (double) MinHeapFreeRatio); |
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1624 expand(expand_bytes); |
342 | 1625 |
1626 // No expansion, now see if we want to shrink | |
1717
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1627 } else if (capacity_after_gc > maximum_desired_capacity) { |
342 | 1628 // Capacity too large, compute shrinking size |
1629 size_t shrink_bytes = capacity_after_gc - maximum_desired_capacity; | |
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1630 ergo_verbose4(ErgoHeapSizing, |
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1631 "attempt heap shrinking", |
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1632 ergo_format_reason("capacity higher than " |
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1633 "max desired capacity after Full GC") |
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1634 ergo_format_byte("capacity") |
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1635 ergo_format_byte("occupancy") |
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1636 ergo_format_byte_perc("max desired capacity"), |
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1637 capacity_after_gc, used_after_gc, |
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1638 maximum_desired_capacity, (double) MaxHeapFreeRatio); |
342 | 1639 shrink(shrink_bytes); |
1640 } | |
1641 } | |
1642 | |
1643 | |
1644 HeapWord* | |
1973 | 1645 G1CollectedHeap::satisfy_failed_allocation(size_t word_size, |
1646 bool* succeeded) { | |
2152 | 1647 assert_at_safepoint(true /* should_be_vm_thread */); |
1973 | 1648 |
1649 *succeeded = true; | |
1650 // Let's attempt the allocation first. | |
2433
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1651 HeapWord* result = |
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1652 attempt_allocation_at_safepoint(word_size, |
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1653 false /* expect_null_mutator_alloc_region */); |
1973 | 1654 if (result != NULL) { |
1655 assert(*succeeded, "sanity"); | |
1656 return result; | |
1657 } | |
342 | 1658 |
1659 // In a G1 heap, we're supposed to keep allocation from failing by | |
1660 // incremental pauses. Therefore, at least for now, we'll favor | |
1661 // expansion over collection. (This might change in the future if we can | |
1662 // do something smarter than full collection to satisfy a failed alloc.) | |
1663 result = expand_and_allocate(word_size); | |
1664 if (result != NULL) { | |
1973 | 1665 assert(*succeeded, "sanity"); |
342 | 1666 return result; |
1667 } | |
1668 | |
1973 | 1669 // Expansion didn't work, we'll try to do a Full GC. |
1670 bool gc_succeeded = do_collection(false, /* explicit_gc */ | |
1671 false, /* clear_all_soft_refs */ | |
1672 word_size); | |
1673 if (!gc_succeeded) { | |
1674 *succeeded = false; | |
1675 return NULL; | |
1676 } | |
1677 | |
1678 // Retry the allocation | |
1679 result = attempt_allocation_at_safepoint(word_size, | |
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1680 true /* expect_null_mutator_alloc_region */); |
342 | 1681 if (result != NULL) { |
1973 | 1682 assert(*succeeded, "sanity"); |
342 | 1683 return result; |
1684 } | |
1685 | |
1973 | 1686 // Then, try a Full GC that will collect all soft references. |
1687 gc_succeeded = do_collection(false, /* explicit_gc */ | |
1688 true, /* clear_all_soft_refs */ | |
1689 word_size); | |
1690 if (!gc_succeeded) { | |
1691 *succeeded = false; | |
1692 return NULL; | |
1693 } | |
1694 | |
1695 // Retry the allocation once more | |
1696 result = attempt_allocation_at_safepoint(word_size, | |
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1697 true /* expect_null_mutator_alloc_region */); |
342 | 1698 if (result != NULL) { |
1973 | 1699 assert(*succeeded, "sanity"); |
342 | 1700 return result; |
1701 } | |
1702 | |
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1703 assert(!collector_policy()->should_clear_all_soft_refs(), |
1973 | 1704 "Flag should have been handled and cleared prior to this point"); |
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1705 |
342 | 1706 // What else? We might try synchronous finalization later. If the total |
1707 // space available is large enough for the allocation, then a more | |
1708 // complete compaction phase than we've tried so far might be | |
1709 // appropriate. | |
1973 | 1710 assert(*succeeded, "sanity"); |
342 | 1711 return NULL; |
1712 } | |
1713 | |
1714 // Attempting to expand the heap sufficiently | |
1715 // to support an allocation of the given "word_size". If | |
1716 // successful, perform the allocation and return the address of the | |
1717 // allocated block, or else "NULL". | |
1718 | |
1719 HeapWord* G1CollectedHeap::expand_and_allocate(size_t word_size) { | |
2152 | 1720 assert_at_safepoint(true /* should_be_vm_thread */); |
1721 | |
1722 verify_region_sets_optional(); | |
1973 | 1723 |
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1724 size_t expand_bytes = MAX2(word_size * HeapWordSize, MinHeapDeltaBytes); |
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1725 ergo_verbose1(ErgoHeapSizing, |
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1726 "attempt heap expansion", |
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1727 ergo_format_reason("allocation request failed") |
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1728 ergo_format_byte("allocation request"), |
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1729 word_size * HeapWordSize); |
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1730 if (expand(expand_bytes)) { |
3766 | 1731 _hrs.verify_optional(); |
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1732 verify_region_sets_optional(); |
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1733 return attempt_allocation_at_safepoint(word_size, |
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1734 false /* expect_null_mutator_alloc_region */); |
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1735 } |
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1736 return NULL; |
342 | 1737 } |
1738 | |
3766 | 1739 void G1CollectedHeap::update_committed_space(HeapWord* old_end, |
1740 HeapWord* new_end) { | |
1741 assert(old_end != new_end, "don't call this otherwise"); | |
1742 assert((HeapWord*) _g1_storage.high() == new_end, "invariant"); | |
1743 | |
1744 // Update the committed mem region. | |
1745 _g1_committed.set_end(new_end); | |
1746 // Tell the card table about the update. | |
1747 Universe::heap()->barrier_set()->resize_covered_region(_g1_committed); | |
1748 // Tell the BOT about the update. | |
1749 _bot_shared->resize(_g1_committed.word_size()); | |
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1750 // Tell the hot card cache about the update |
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1751 _cg1r->hot_card_cache()->resize_card_counts(capacity()); |
3766 | 1752 } |
1753 | |
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1754 bool G1CollectedHeap::expand(size_t expand_bytes) { |
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1755 size_t aligned_expand_bytes = ReservedSpace::page_align_size_up(expand_bytes); |
342 | 1756 aligned_expand_bytes = align_size_up(aligned_expand_bytes, |
1757 HeapRegion::GrainBytes); | |
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1758 ergo_verbose2(ErgoHeapSizing, |
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1759 "expand the heap", |
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1760 ergo_format_byte("requested expansion amount") |
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1761 ergo_format_byte("attempted expansion amount"), |
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1762 expand_bytes, aligned_expand_bytes); |
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1763 |
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1764 if (_g1_storage.uncommitted_size() == 0) { |
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1765 ergo_verbose0(ErgoHeapSizing, |
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1766 "did not expand the heap", |
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1767 ergo_format_reason("heap already fully expanded")); |
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1768 return false; |
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1769 } |
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1770 |
3766 | 1771 // First commit the memory. |
1772 HeapWord* old_end = (HeapWord*) _g1_storage.high(); | |
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1773 bool successful = _g1_storage.expand_by(aligned_expand_bytes); |
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1774 if (successful) { |
3766 | 1775 // Then propagate this update to the necessary data structures. |
1776 HeapWord* new_end = (HeapWord*) _g1_storage.high(); | |
1777 update_committed_space(old_end, new_end); | |
1778 | |
1779 FreeRegionList expansion_list("Local Expansion List"); | |
1780 MemRegion mr = _hrs.expand_by(old_end, new_end, &expansion_list); | |
1781 assert(mr.start() == old_end, "post-condition"); | |
1782 // mr might be a smaller region than what was requested if | |
1783 // expand_by() was unable to allocate the HeapRegion instances | |
1784 assert(mr.end() <= new_end, "post-condition"); | |
1785 | |
1786 size_t actual_expand_bytes = mr.byte_size(); | |
1787 assert(actual_expand_bytes <= aligned_expand_bytes, "post-condition"); | |
1788 assert(actual_expand_bytes == expansion_list.total_capacity_bytes(), | |
1789 "post-condition"); | |
1790 if (actual_expand_bytes < aligned_expand_bytes) { | |
1791 // We could not expand _hrs to the desired size. In this case we | |
1792 // need to shrink the committed space accordingly. | |
1793 assert(mr.end() < new_end, "invariant"); | |
1794 | |
1795 size_t diff_bytes = aligned_expand_bytes - actual_expand_bytes; | |
1796 // First uncommit the memory. | |
1797 _g1_storage.shrink_by(diff_bytes); | |
1798 // Then propagate this update to the necessary data structures. | |
1799 update_committed_space(new_end, mr.end()); | |
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1800 } |
3766 | 1801 _free_list.add_as_tail(&expansion_list); |
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1802 |
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1803 if (_hr_printer.is_active()) { |
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1804 HeapWord* curr = mr.start(); |
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1805 while (curr < mr.end()) { |
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1806 HeapWord* curr_end = curr + HeapRegion::GrainWords; |
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1807 _hr_printer.commit(curr, curr_end); |
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1808 curr = curr_end; |
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1809 } |
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1810 assert(curr == mr.end(), "post-condition"); |
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1811 } |
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1812 g1_policy()->record_new_heap_size(n_regions()); |
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1813 } else { |
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1814 ergo_verbose0(ErgoHeapSizing, |
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1815 "did not expand the heap", |
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1816 ergo_format_reason("heap expansion operation failed")); |
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1817 // The expansion of the virtual storage space was unsuccessful. |
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1818 // Let's see if it was because we ran out of swap. |
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1819 if (G1ExitOnExpansionFailure && |
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1820 _g1_storage.uncommitted_size() >= aligned_expand_bytes) { |
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1821 // We had head room... |
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1822 vm_exit_out_of_memory(aligned_expand_bytes, OOM_MMAP_ERROR, "G1 heap expansion"); |
342 | 1823 } |
1824 } | |
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1825 return successful; |
342 | 1826 } |
1827 | |
3766 | 1828 void G1CollectedHeap::shrink_helper(size_t shrink_bytes) { |
342 | 1829 size_t aligned_shrink_bytes = |
1830 ReservedSpace::page_align_size_down(shrink_bytes); | |
1831 aligned_shrink_bytes = align_size_down(aligned_shrink_bytes, | |
1832 HeapRegion::GrainBytes); | |
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1833 uint num_regions_to_remove = (uint)(shrink_bytes / HeapRegion::GrainBytes); |
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1834 |
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1835 uint num_regions_removed = _hrs.shrink_by(num_regions_to_remove); |
3766 | 1836 HeapWord* old_end = (HeapWord*) _g1_storage.high(); |
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1837 size_t shrunk_bytes = num_regions_removed * HeapRegion::GrainBytes; |
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1838 |
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1839 ergo_verbose3(ErgoHeapSizing, |
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1840 "shrink the heap", |
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1841 ergo_format_byte("requested shrinking amount") |
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1842 ergo_format_byte("aligned shrinking amount") |
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1843 ergo_format_byte("attempted shrinking amount"), |
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1844 shrink_bytes, aligned_shrink_bytes, shrunk_bytes); |
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1845 if (num_regions_removed > 0) { |
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1846 _g1_storage.shrink_by(shrunk_bytes); |
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1847 HeapWord* new_end = (HeapWord*) _g1_storage.high(); |
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1848 |
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1849 if (_hr_printer.is_active()) { |
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1850 HeapWord* curr = old_end; |
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1851 while (curr > new_end) { |
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1852 HeapWord* curr_end = curr; |
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1853 curr -= HeapRegion::GrainWords; |
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1854 _hr_printer.uncommit(curr, curr_end); |
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1855 } |
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1856 } |
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1857 |
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1858 _expansion_regions += num_regions_removed; |
3766 | 1859 update_committed_space(old_end, new_end); |
1860 HeapRegionRemSet::shrink_heap(n_regions()); | |
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1861 g1_policy()->record_new_heap_size(n_regions()); |
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1862 } else { |
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1863 ergo_verbose0(ErgoHeapSizing, |
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1864 "did not shrink the heap", |
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1865 ergo_format_reason("heap shrinking operation failed")); |
342 | 1866 } |
1867 } | |
1868 | |
1869 void G1CollectedHeap::shrink(size_t shrink_bytes) { | |
2152 | 1870 verify_region_sets_optional(); |
1871 | |
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1872 // We should only reach here at the end of a Full GC which means we |
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1873 // should not not be holding to any GC alloc regions. The method |
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1874 // below will make sure of that and do any remaining clean up. |
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1875 abandon_gc_alloc_regions(); |
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1876 |
2152 | 1877 // Instead of tearing down / rebuilding the free lists here, we |
1878 // could instead use the remove_all_pending() method on free_list to | |
1879 // remove only the ones that we need to remove. | |
4072 | 1880 tear_down_region_sets(true /* free_list_only */); |
342 | 1881 shrink_helper(shrink_bytes); |
4072 | 1882 rebuild_region_sets(true /* free_list_only */); |
2152 | 1883 |
3766 | 1884 _hrs.verify_optional(); |
2152 | 1885 verify_region_sets_optional(); |
342 | 1886 } |
1887 | |
1888 // Public methods. | |
1889 | |
1890 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away | |
1891 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list | |
1892 #endif // _MSC_VER | |
1893 | |
1894 | |
1895 G1CollectedHeap::G1CollectedHeap(G1CollectorPolicy* policy_) : | |
1896 SharedHeap(policy_), | |
1897 _g1_policy(policy_), | |
1111 | 1898 _dirty_card_queue_set(false), |
1705 | 1899 _into_cset_dirty_card_queue_set(false), |
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1900 _is_alive_closure_cm(this), |
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1901 _is_alive_closure_stw(this), |
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1902 _ref_processor_cm(NULL), |
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1903 _ref_processor_stw(NULL), |
342 | 1904 _process_strong_tasks(new SubTasksDone(G1H_PS_NumElements)), |
1905 _bot_shared(NULL), | |
10405 | 1906 _evac_failure_scan_stack(NULL), |
342 | 1907 _mark_in_progress(false), |
2152 | 1908 _cg1r(NULL), _summary_bytes_used(0), |
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1909 _g1mm(NULL), |
342 | 1910 _refine_cte_cl(NULL), |
1911 _full_collection(false), | |
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1912 _free_list("Master Free List", new MasterFreeRegionListMtSafeChecker()), |
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1913 _secondary_free_list("Secondary Free List", new SecondaryFreeRegionListMtSafeChecker()), |
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1914 _old_set("Old Set", false /* humongous */, new OldRegionSetMtSafeChecker()), |
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1915 _humongous_set("Master Humongous Set", true /* humongous */, new HumongousRegionSetMtSafeChecker()), |
2152 | 1916 _free_regions_coming(false), |
342 | 1917 _young_list(new YoungList(this)), |
1918 _gc_time_stamp(0), | |
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1919 _retained_old_gc_alloc_region(NULL), |
6595 | 1920 _survivor_plab_stats(YoungPLABSize, PLABWeight), |
1921 _old_plab_stats(OldPLABSize, PLABWeight), | |
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1922 _expand_heap_after_alloc_failure(true), |
526 | 1923 _surviving_young_words(NULL), |
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1924 _old_marking_cycles_started(0), |
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1925 _old_marking_cycles_completed(0), |
10405 | 1926 _concurrent_cycle_started(false), |
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1927 _in_cset_fast_test(), |
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1928 _dirty_cards_region_list(NULL), |
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1929 _worker_cset_start_region(NULL), |
10405 | 1930 _worker_cset_start_region_time_stamp(NULL), |
1931 _gc_timer_stw(new (ResourceObj::C_HEAP, mtGC) STWGCTimer()), | |
1932 _gc_timer_cm(new (ResourceObj::C_HEAP, mtGC) ConcurrentGCTimer()), | |
1933 _gc_tracer_stw(new (ResourceObj::C_HEAP, mtGC) G1NewTracer()), | |
1934 _gc_tracer_cm(new (ResourceObj::C_HEAP, mtGC) G1OldTracer()) { | |
1935 | |
1936 _g1h = this; | |
342 | 1937 if (_process_strong_tasks == NULL || !_process_strong_tasks->valid()) { |
1938 vm_exit_during_initialization("Failed necessary allocation."); | |
1939 } | |
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1940 |
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1941 _humongous_object_threshold_in_words = HeapRegion::GrainWords / 2; |
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1942 |
342 | 1943 int n_queues = MAX2((int)ParallelGCThreads, 1); |
1944 _task_queues = new RefToScanQueueSet(n_queues); | |
1945 | |
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1946 uint n_rem_sets = HeapRegionRemSet::num_par_rem_sets(); |
342 | 1947 assert(n_rem_sets > 0, "Invariant."); |
1948 | |
6197 | 1949 _worker_cset_start_region = NEW_C_HEAP_ARRAY(HeapRegion*, n_queues, mtGC); |
1950 _worker_cset_start_region_time_stamp = NEW_C_HEAP_ARRAY(unsigned int, n_queues, mtGC); | |
10405 | 1951 _evacuation_failed_info_array = NEW_C_HEAP_ARRAY(EvacuationFailedInfo, n_queues, mtGC); |
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1952 |
342 | 1953 for (int i = 0; i < n_queues; i++) { |
1954 RefToScanQueue* q = new RefToScanQueue(); | |
1955 q->initialize(); | |
1956 _task_queues->register_queue(i, q); | |
10405 | 1957 ::new (&_evacuation_failed_info_array[i]) EvacuationFailedInfo(); |
1958 } | |
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1959 clear_cset_start_regions(); |
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1960 |
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1961 // Initialize the G1EvacuationFailureALot counters and flags. |
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1962 NOT_PRODUCT(reset_evacuation_should_fail();) |
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1963 |
342 | 1964 guarantee(_task_queues != NULL, "task_queues allocation failure."); |
1965 } | |
1966 | |
1967 jint G1CollectedHeap::initialize() { | |
1166 | 1968 CollectedHeap::pre_initialize(); |
342 | 1969 os::enable_vtime(); |
1970 | |
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1971 G1Log::init(); |
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1972 |
342 | 1973 // Necessary to satisfy locking discipline assertions. |
1974 | |
1975 MutexLocker x(Heap_lock); | |
1976 | |
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1977 // We have to initialize the printer before committing the heap, as |
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1978 // it will be used then. |
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1979 _hr_printer.set_active(G1PrintHeapRegions); |
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1980 |
342 | 1981 // While there are no constraints in the GC code that HeapWordSize |
1982 // be any particular value, there are multiple other areas in the | |
1983 // system which believe this to be true (e.g. oop->object_size in some | |
1984 // cases incorrectly returns the size in wordSize units rather than | |
1985 // HeapWordSize). | |
1986 guarantee(HeapWordSize == wordSize, "HeapWordSize must equal wordSize"); | |
1987 | |
1988 size_t init_byte_size = collector_policy()->initial_heap_byte_size(); | |
1989 size_t max_byte_size = collector_policy()->max_heap_byte_size(); | |
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1990 size_t heap_alignment = collector_policy()->heap_alignment(); |
342 | 1991 |
1992 // Ensure that the sizes are properly aligned. | |
1993 Universe::check_alignment(init_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
1994 Universe::check_alignment(max_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
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1995 Universe::check_alignment(max_byte_size, heap_alignment, "g1 heap"); |
342 | 1996 |
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1997 _refine_cte_cl = new RefineCardTableEntryClosure(); |
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1998 |
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1999 _cg1r = new ConcurrentG1Refine(this, _refine_cte_cl); |
342 | 2000 |
2001 // Reserve the maximum. | |
642
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2002 |
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2003 // When compressed oops are enabled, the preferred heap base |
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2004 // is calculated by subtracting the requested size from the |
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2005 // 32Gb boundary and using the result as the base address for |
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2006 // heap reservation. If the requested size is not aligned to |
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2007 // HeapRegion::GrainBytes (i.e. the alignment that is passed |
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2008 // into the ReservedHeapSpace constructor) then the actual |
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2009 // base of the reserved heap may end up differing from the |
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2010 // address that was requested (i.e. the preferred heap base). |
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2011 // If this happens then we could end up using a non-optimal |
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2012 // compressed oops mode. |
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2013 |
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2014 ReservedSpace heap_rs = Universe::reserve_heap(max_byte_size, |
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2015 heap_alignment); |
342 | 2016 |
2017 // It is important to do this in a way such that concurrent readers can't | |
10405 | 2018 // temporarily think something is in the heap. (I've actually seen this |
342 | 2019 // happen in asserts: DLD.) |
2020 _reserved.set_word_size(0); | |
2021 _reserved.set_start((HeapWord*)heap_rs.base()); | |
2022 _reserved.set_end((HeapWord*)(heap_rs.base() + heap_rs.size())); | |
2023 | |
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2024 _expansion_regions = (uint) (max_byte_size / HeapRegion::GrainBytes); |
342 | 2025 |
2026 // Create the gen rem set (and barrier set) for the entire reserved region. | |
2027 _rem_set = collector_policy()->create_rem_set(_reserved, 2); | |
2028 set_barrier_set(rem_set()->bs()); | |
12343 | 2029 if (!barrier_set()->is_a(BarrierSet::G1SATBCTLogging)) { |
2030 vm_exit_during_initialization("G1 requires a G1SATBLoggingCardTableModRefBS"); | |
342 | 2031 return JNI_ENOMEM; |
2032 } | |
2033 | |
2034 // Also create a G1 rem set. | |
12343 | 2035 _g1_rem_set = new G1RemSet(this, g1_barrier_set()); |
342 | 2036 |
2037 // Carve out the G1 part of the heap. | |
2038 | |
2039 ReservedSpace g1_rs = heap_rs.first_part(max_byte_size); | |
2040 _g1_reserved = MemRegion((HeapWord*)g1_rs.base(), | |
2041 g1_rs.size()/HeapWordSize); | |
2042 | |
2043 _g1_storage.initialize(g1_rs, 0); | |
2044 _g1_committed = MemRegion((HeapWord*)_g1_storage.low(), (size_t) 0); | |
3766 | 2045 _hrs.initialize((HeapWord*) _g1_reserved.start(), |
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2046 (HeapWord*) _g1_reserved.end()); |
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2047 assert(_hrs.max_length() == _expansion_regions, |
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2048 err_msg("max length: %u expansion regions: %u", |
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changeset
|
2049 _hrs.max_length(), _expansion_regions)); |
342 | 2050 |
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2051 // 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
|
2052 _cg1r->init(); |
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2053 |
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
changeset
|
2054 // 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
|
2055 // in the remembered set structures. |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2056 const uint max_region_idx = (1U << (sizeof(RegionIdx_t)*BitsPerByte-1)) - 1; |
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
changeset
|
2057 guarantee((max_regions() - 1) <= max_region_idx, "too many regions"); |
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
changeset
|
2058 |
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
changeset
|
2059 size_t max_cards_per_region = ((size_t)1 << (sizeof(CardIdx_t)*BitsPerByte-1)) - 1; |
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
941
diff
changeset
|
2060 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
|
2061 guarantee(HeapRegion::CardsPerRegion < max_cards_per_region, |
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
941
diff
changeset
|
2062 "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
|
2063 |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
2064 FreeRegionList::set_unrealistically_long_length(max_regions() + 1); |
2152 | 2065 |
342 | 2066 _bot_shared = new G1BlockOffsetSharedArray(_reserved, |
2067 heap_word_size(init_byte_size)); | |
2068 | |
2069 _g1h = this; | |
2070 | |
20212
d7e2d5f2846b
8027553: Change the in_cset_fast_test functionality to use the G1BiasedArray abstraction
tschatzl
parents:
20198
diff
changeset
|
2071 _in_cset_fast_test.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
|
2072 |
342 | 2073 // Create the ConcurrentMark data structure and thread. |
2074 // (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
|
2075 _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
|
2076 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
|
2077 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
|
2078 return JNI_ENOMEM; |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2079 } |
342 | 2080 _cmThread = _cm->cmThread(); |
2081 | |
2082 // Initialize the from_card cache structure of HeapRegionRemSet. | |
2083 HeapRegionRemSet::init_heap(max_regions()); | |
2084 | |
677 | 2085 // Now expand into the initial heap size. |
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2086 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
|
2087 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
|
2088 return JNI_ENOMEM; |
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2089 } |
342 | 2090 |
2091 // Perform any initialization actions delegated to the policy. | |
2092 g1_policy()->init(); | |
2093 | |
2094 JavaThread::satb_mark_queue_set().initialize(SATB_Q_CBL_mon, | |
2095 SATB_Q_FL_lock, | |
1111 | 2096 G1SATBProcessCompletedThreshold, |
342 | 2097 Shared_SATB_Q_lock); |
794 | 2098 |
20216
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
2099 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
|
2100 DirtyCardQ_CBL_mon, |
794 | 2101 DirtyCardQ_FL_lock, |
1111 | 2102 concurrent_g1_refine()->yellow_zone(), |
2103 concurrent_g1_refine()->red_zone(), | |
794 | 2104 Shared_DirtyCardQ_lock); |
2105 | |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2106 if (G1DeferredRSUpdate) { |
20216
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
2107 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
|
2108 DirtyCardQ_CBL_mon, |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2109 DirtyCardQ_FL_lock, |
1111 | 2110 -1, // never trigger processing |
2111 -1, // no limit on length | |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2112 Shared_DirtyCardQ_lock, |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2113 &JavaThread::dirty_card_queue_set()); |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2114 } |
1705 | 2115 |
2116 // Initialize the card queue set used to hold cards containing | |
2117 // references into the collection set. | |
20216
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
2118 _into_cset_dirty_card_queue_set.initialize(NULL, // Should never be called by the Java code |
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
2119 DirtyCardQ_CBL_mon, |
1705 | 2120 DirtyCardQ_FL_lock, |
2121 -1, // never trigger processing | |
2122 -1, // no limit on length | |
2123 Shared_DirtyCardQ_lock, | |
2124 &JavaThread::dirty_card_queue_set()); | |
2125 | |
342 | 2126 // In case we're keeping closure specialization stats, initialize those |
2127 // counts and that mechanism. | |
2128 SpecializationStats::clear(); | |
2129 | |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2130 // 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
|
2131 // 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
|
2132 // space here, lots of asserts fire. |
3766 | 2133 |
2134 HeapRegion* dummy_region = new_heap_region(0 /* index of bottom region */, | |
2135 _g1_reserved.start()); | |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2136 // 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
|
2137 // 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
|
2138 // 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
|
2139 // 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
|
2140 dummy_region->set_young(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2141 // Make sure it's full. |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2142 dummy_region->set_top(dummy_region->end()); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2143 G1AllocRegion::setup(this, dummy_region); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2144 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2145 init_mutator_alloc_region(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2146 |
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
2147 // 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
|
2148 // values in the heap have been properly initialized. |
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
2149 _g1mm = new G1MonitoringSupport(this); |
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
2150 |
17764 | 2151 G1StringDedup::initialize(); |
2152 | |
342 | 2153 return JNI_OK; |
2154 } | |
2155 | |
17947
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
17937
diff
changeset
|
2156 void G1CollectedHeap::stop() { |
17992 | 2157 // Stop all concurrent threads. We do this to make sure these threads |
2158 // do not continue to execute and access resources (e.g. gclog_or_tty) | |
17947
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
17937
diff
changeset
|
2159 // that are destroyed during shutdown. |
17992 | 2160 _cg1r->stop(); |
2161 _cmThread->stop(); | |
2162 if (G1StringDedup::is_enabled()) { | |
2163 G1StringDedup::stop(); | |
2164 } | |
17947
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
17937
diff
changeset
|
2165 } |
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
17937
diff
changeset
|
2166 |
12233
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2167 size_t G1CollectedHeap::conservative_max_heap_alignment() { |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2168 return HeapRegion::max_region_size(); |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2169 } |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2170 |
342 | 2171 void G1CollectedHeap::ref_processing_init() { |
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
2172 // Reference processing in G1 currently works as follows: |
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
2173 // |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2174 // * There are two reference processor instances. One is |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2175 // used to record and process discovered references |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2176 // during concurrent marking; the other is used to |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2177 // record and process references during STW pauses |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2178 // (both full and incremental). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2179 // * Both ref processors need to 'span' the entire heap as |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2180 // the regions in the collection set may be dotted around. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2181 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2182 // * For the concurrent marking ref processor: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2183 // * Reference discovery is enabled at initial marking. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2184 // * Reference discovery is disabled and the discovered |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2185 // references processed etc during remarking. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2186 // * Reference discovery is MT (see below). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2187 // * Reference discovery requires a barrier (see below). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2188 // * Reference processing may or may not be MT |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2189 // (depending on the value of ParallelRefProcEnabled |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2190 // and ParallelGCThreads). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2191 // * A full GC disables reference discovery by the CM |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2192 // ref processor and abandons any entries on it's |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2193 // discovered lists. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2194 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2195 // * For the STW processor: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2196 // * Non MT discovery is enabled at the start of a full GC. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2197 // * Processing and enqueueing during a full GC is non-MT. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2198 // * During a full GC, references are processed after marking. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2199 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2200 // * Discovery (may or may not be MT) is enabled at the start |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2201 // of an incremental evacuation pause. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2202 // * References are processed near the end of a STW evacuation pause. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2203 // * For both types of GC: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2204 // * Discovery is atomic - i.e. not concurrent. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2205 // * Reference discovery will not need a barrier. |
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
2206 |
342 | 2207 SharedHeap::ref_processing_init(); |
2208 MemRegion mr = reserved_region(); | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2209 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2210 // Concurrent Mark ref processor |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2211 _ref_processor_cm = |
2369
92da084fefc9
6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads
ysr
parents:
2361
diff
changeset
|
2212 new ReferenceProcessor(mr, // span |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2213 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2214 // mt processing |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2215 (int) ParallelGCThreads, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2216 // degree of mt processing |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2217 (ParallelGCThreads > 1) || (ConcGCThreads > 1), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2218 // mt discovery |
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2219 (int) MAX2(ParallelGCThreads, ConcGCThreads), |
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2220 // degree of mt discovery |
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|
2221 false, |
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|
2222 // Reference discovery is not atomic |
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2223 &_is_alive_closure_cm); |
3979
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2224 // is alive closure |
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|
2225 // (for efficiency/performance) |
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2226 |
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|
2227 // STW ref processor |
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|
2228 _ref_processor_stw = |
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|
2229 new ReferenceProcessor(mr, // span |
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2230 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
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2231 // mt processing |
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2232 MAX2((int)ParallelGCThreads, 1), |
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2233 // degree of mt processing |
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2234 (ParallelGCThreads > 1), |
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2235 // mt discovery |
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2236 MAX2((int)ParallelGCThreads, 1), |
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2237 // degree of mt discovery |
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2238 true, |
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2239 // Reference discovery is atomic |
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2240 &_is_alive_closure_stw); |
3979
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2241 // is alive closure |
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2242 // (for efficiency/performance) |
342 | 2243 } |
2244 | |
2245 size_t G1CollectedHeap::capacity() const { | |
2246 return _g1_committed.byte_size(); | |
2247 } | |
2248 | |
6254
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2249 void G1CollectedHeap::reset_gc_time_stamps(HeapRegion* hr) { |
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2250 assert(!hr->continuesHumongous(), "pre-condition"); |
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2251 hr->reset_gc_time_stamp(); |
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2252 if (hr->startsHumongous()) { |
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2253 uint first_index = hr->hrs_index() + 1; |
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2254 uint last_index = hr->last_hc_index(); |
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2255 for (uint i = first_index; i < last_index; i += 1) { |
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2256 HeapRegion* chr = region_at(i); |
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2257 assert(chr->continuesHumongous(), "sanity"); |
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2258 chr->reset_gc_time_stamp(); |
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2259 } |
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2260 } |
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2261 } |
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2262 |
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2263 #ifndef PRODUCT |
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2264 class CheckGCTimeStampsHRClosure : public HeapRegionClosure { |
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2265 private: |
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2266 unsigned _gc_time_stamp; |
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2267 bool _failures; |
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2268 |
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2269 public: |
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2270 CheckGCTimeStampsHRClosure(unsigned gc_time_stamp) : |
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2271 _gc_time_stamp(gc_time_stamp), _failures(false) { } |
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2272 |
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2273 virtual bool doHeapRegion(HeapRegion* hr) { |
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2274 unsigned region_gc_time_stamp = hr->get_gc_time_stamp(); |
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2275 if (_gc_time_stamp != region_gc_time_stamp) { |
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2276 gclog_or_tty->print_cr("Region "HR_FORMAT" has GC time stamp = %d, " |
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2277 "expected %d", HR_FORMAT_PARAMS(hr), |
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2278 region_gc_time_stamp, _gc_time_stamp); |
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2279 _failures = true; |
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2280 } |
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2281 return false; |
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|
2282 } |
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2283 |
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2284 bool failures() { return _failures; } |
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2285 }; |
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|
2286 |
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2287 void G1CollectedHeap::check_gc_time_stamps() { |
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2288 CheckGCTimeStampsHRClosure cl(_gc_time_stamp); |
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2289 heap_region_iterate(&cl); |
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2290 guarantee(!cl.failures(), "all GC time stamps should have been reset"); |
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2291 } |
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2292 #endif // PRODUCT |
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|
2293 |
1705 | 2294 void G1CollectedHeap::iterate_dirty_card_closure(CardTableEntryClosure* cl, |
2295 DirtyCardQueue* into_cset_dcq, | |
2296 bool concurrent, | |
17844
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|
2297 uint worker_i) { |
889 | 2298 // Clean cards in the hot card cache |
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2299 G1HotCardCache* hot_card_cache = _cg1r->hot_card_cache(); |
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|
2300 hot_card_cache->drain(worker_i, g1_rem_set(), into_cset_dcq); |
889 | 2301 |
342 | 2302 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); |
2303 int n_completed_buffers = 0; | |
1705 | 2304 while (dcqs.apply_closure_to_completed_buffer(cl, worker_i, 0, true)) { |
342 | 2305 n_completed_buffers++; |
2306 } | |
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|
2307 g1_policy()->phase_times()->record_update_rs_processed_buffers(worker_i, n_completed_buffers); |
342 | 2308 dcqs.clear_n_completed_buffers(); |
2309 assert(!dcqs.completed_buffers_exist_dirty(), "Completed buffers exist!"); | |
2310 } | |
2311 | |
2312 | |
2313 // Computes the sum of the storage used by the various regions. | |
2314 | |
2315 size_t G1CollectedHeap::used() const { | |
862
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|
2316 assert(Heap_lock->owner() != NULL, |
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|
2317 "Should be owned on this thread's behalf."); |
342 | 2318 size_t result = _summary_bytes_used; |
845
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2319 // Read only once in case it is set to NULL concurrently |
2433
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2320 HeapRegion* hr = _mutator_alloc_region.get(); |
845
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2321 if (hr != NULL) |
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2322 result += hr->used(); |
342 | 2323 return result; |
2324 } | |
2325 | |
846
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2326 size_t G1CollectedHeap::used_unlocked() const { |
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2327 size_t result = _summary_bytes_used; |
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2328 return result; |
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2329 } |
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2330 |
342 | 2331 class SumUsedClosure: public HeapRegionClosure { |
2332 size_t _used; | |
2333 public: | |
2334 SumUsedClosure() : _used(0) {} | |
2335 bool doHeapRegion(HeapRegion* r) { | |
2336 if (!r->continuesHumongous()) { | |
2337 _used += r->used(); | |
2338 } | |
2339 return false; | |
2340 } | |
2341 size_t result() { return _used; } | |
2342 }; | |
2343 | |
2344 size_t G1CollectedHeap::recalculate_used() const { | |
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2345 double recalculate_used_start = os::elapsedTime(); |
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2346 |
342 | 2347 SumUsedClosure blk; |
3766 | 2348 heap_region_iterate(&blk); |
17757
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2349 |
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2350 g1_policy()->phase_times()->record_evac_fail_recalc_used_time((os::elapsedTime() - recalculate_used_start) * 1000.0); |
342 | 2351 return blk.result(); |
2352 } | |
2353 | |
2354 size_t G1CollectedHeap::unsafe_max_alloc() { | |
2152 | 2355 if (free_regions() > 0) return HeapRegion::GrainBytes; |
342 | 2356 // otherwise, is there space in the current allocation region? |
2357 | |
2358 // We need to store the current allocation region in a local variable | |
2359 // here. The problem is that this method doesn't take any locks and | |
2360 // there may be other threads which overwrite the current allocation | |
2361 // region field. attempt_allocation(), for example, sets it to NULL | |
2362 // and this can happen *after* the NULL check here but before the call | |
2363 // to free(), resulting in a SIGSEGV. Note that this doesn't appear | |
2364 // to be a problem in the optimized build, since the two loads of the | |
2365 // current allocation region field are optimized away. | |
2433
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2366 HeapRegion* hr = _mutator_alloc_region.get(); |
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2367 if (hr == NULL) { |
342 | 2368 return 0; |
2369 } | |
2433
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2370 return hr->free(); |
342 | 2371 } |
2372 | |
1656
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2373 bool G1CollectedHeap::should_do_concurrent_full_gc(GCCause::Cause cause) { |
4910
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2374 switch (cause) { |
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2375 case GCCause::_gc_locker: return GCLockerInvokesConcurrent; |
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2376 case GCCause::_java_lang_system_gc: return ExplicitGCInvokesConcurrent; |
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2377 case GCCause::_g1_humongous_allocation: return true; |
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2378 default: return false; |
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|
2379 } |
1656
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|
2380 } |
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|
2381 |
3285
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|
2382 #ifndef PRODUCT |
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2383 void G1CollectedHeap::allocate_dummy_regions() { |
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|
2384 // Let's fill up most of the region |
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|
2385 size_t word_size = HeapRegion::GrainWords - 1024; |
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2386 // And as a result the region we'll allocate will be humongous. |
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|
2387 guarantee(isHumongous(word_size), "sanity"); |
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|
2388 |
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|
2389 for (uintx i = 0; i < G1DummyRegionsPerGC; ++i) { |
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2390 // Let's use the existing mechanism for the allocation |
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changeset
|
2391 HeapWord* dummy_obj = humongous_obj_allocate(word_size); |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2392 if (dummy_obj != NULL) { |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2393 MemRegion mr(dummy_obj, word_size); |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2394 CollectedHeap::fill_with_object(mr); |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2395 } else { |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2396 // If we can't allocate once, we probably cannot allocate |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2397 // again. Let's get out of the loop. |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2398 break; |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2399 } |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2400 } |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2401 } |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2402 #endif // !PRODUCT |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2403 |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2404 void G1CollectedHeap::increment_old_marking_cycles_started() { |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2405 assert(_old_marking_cycles_started == _old_marking_cycles_completed || |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2406 _old_marking_cycles_started == _old_marking_cycles_completed + 1, |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2407 err_msg("Wrong marking cycle count (started: %d, completed: %d)", |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2408 _old_marking_cycles_started, _old_marking_cycles_completed)); |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2409 |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2410 _old_marking_cycles_started++; |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2411 } |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2412 |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2413 void G1CollectedHeap::increment_old_marking_cycles_completed(bool concurrent) { |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2414 MonitorLockerEx x(FullGCCount_lock, Mutex::_no_safepoint_check_flag); |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2415 |
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2416 // We assume that if concurrent == true, then the caller is a |
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2417 // concurrent thread that was joined the Suspendible Thread |
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2418 // Set. If there's ever a cheap way to check this, we should add an |
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2419 // assert here. |
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2420 |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2421 // Given that this method is called at the end of a Full GC or of a |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2422 // concurrent cycle, and those can be nested (i.e., a Full GC can |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2423 // interrupt a concurrent cycle), the number of full collections |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2424 // completed should be either one (in the case where there was no |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2425 // nesting) or two (when a Full GC interrupted a concurrent cycle) |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2426 // behind the number of full collections started. |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2427 |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2428 // This is the case for the inner caller, i.e. a Full GC. |
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2429 assert(concurrent || |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2430 (_old_marking_cycles_started == _old_marking_cycles_completed + 1) || |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2431 (_old_marking_cycles_started == _old_marking_cycles_completed + 2), |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2432 err_msg("for inner caller (Full GC): _old_marking_cycles_started = %u " |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2433 "is inconsistent with _old_marking_cycles_completed = %u", |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2434 _old_marking_cycles_started, _old_marking_cycles_completed)); |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2435 |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2436 // This is the case for the outer caller, i.e. the concurrent cycle. |
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2437 assert(!concurrent || |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2438 (_old_marking_cycles_started == _old_marking_cycles_completed + 1), |
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2439 err_msg("for outer caller (concurrent cycle): " |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2440 "_old_marking_cycles_started = %u " |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2441 "is inconsistent with _old_marking_cycles_completed = %u", |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2442 _old_marking_cycles_started, _old_marking_cycles_completed)); |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2443 |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2444 _old_marking_cycles_completed += 1; |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2445 |
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2446 // We need to clear the "in_progress" flag in the CM thread before |
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2447 // we wake up any waiters (especially when ExplicitInvokesConcurrent |
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2448 // is set) so that if a waiter requests another System.gc() it doesn't |
10405 | 2449 // incorrectly see that a marking cycle is still in progress. |
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2450 if (concurrent) { |
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2451 _cmThread->clear_in_progress(); |
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2452 } |
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2453 |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2454 // This notify_all() will ensure that a thread that called |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2455 // System.gc() with (with ExplicitGCInvokesConcurrent set or not) |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2456 // and it's waiting for a full GC to finish will be woken up. It is |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2457 // waiting in VM_G1IncCollectionPause::doit_epilogue(). |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2458 FullGCCount_lock->notify_all(); |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2459 } |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2460 |
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
2461 void G1CollectedHeap::register_concurrent_cycle_start(const Ticks& start_time) { |
10405 | 2462 _concurrent_cycle_started = true; |
2463 _gc_timer_cm->register_gc_start(start_time); | |
2464 | |
2465 _gc_tracer_cm->report_gc_start(gc_cause(), _gc_timer_cm->gc_start()); | |
2466 trace_heap_before_gc(_gc_tracer_cm); | |
2467 } | |
2468 | |
2469 void G1CollectedHeap::register_concurrent_cycle_end() { | |
2470 if (_concurrent_cycle_started) { | |
2471 if (_cm->has_aborted()) { | |
2472 _gc_tracer_cm->report_concurrent_mode_failure(); | |
2473 } | |
12179
f175e3678be2
8020692: TestGCEventMixed.java failed because of timestamp in event after end event
ehelin
parents:
12116
diff
changeset
|
2474 |
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
2475 _gc_timer_cm->register_gc_end(); |
10405 | 2476 _gc_tracer_cm->report_gc_end(_gc_timer_cm->gc_end(), _gc_timer_cm->time_partitions()); |
2477 | |
2478 _concurrent_cycle_started = false; | |
2479 } | |
2480 } | |
2481 | |
2482 void G1CollectedHeap::trace_heap_after_concurrent_cycle() { | |
2483 if (_concurrent_cycle_started) { | |
2484 trace_heap_after_gc(_gc_tracer_cm); | |
2485 } | |
2486 } | |
2487 | |
2488 G1YCType G1CollectedHeap::yc_type() { | |
2489 bool is_young = g1_policy()->gcs_are_young(); | |
2490 bool is_initial_mark = g1_policy()->during_initial_mark_pause(); | |
2491 bool is_during_mark = mark_in_progress(); | |
2492 | |
2493 if (is_initial_mark) { | |
2494 return InitialMark; | |
2495 } else if (is_during_mark) { | |
2496 return DuringMark; | |
2497 } else if (is_young) { | |
2498 return Normal; | |
2499 } else { | |
2500 return Mixed; | |
2501 } | |
2502 } | |
2503 | |
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2504 void G1CollectedHeap::collect(GCCause::Cause cause) { |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2505 assert_heap_not_locked(); |
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2506 |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2507 unsigned int gc_count_before; |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2508 unsigned int old_marking_count_before; |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2509 bool retry_gc; |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2510 |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2511 do { |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2512 retry_gc = false; |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2513 |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2514 { |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2515 MutexLocker ml(Heap_lock); |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2516 |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2517 // Read the GC count while holding the Heap_lock |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2518 gc_count_before = total_collections(); |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2519 old_marking_count_before = _old_marking_cycles_started; |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2520 } |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2521 |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2522 if (should_do_concurrent_full_gc(cause)) { |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2523 // Schedule an initial-mark evacuation pause that will start a |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2524 // concurrent cycle. We're setting word_size to 0 which means that |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2525 // we are not requesting a post-GC allocation. |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2526 VM_G1IncCollectionPause op(gc_count_before, |
1973 | 2527 0, /* word_size */ |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2528 true, /* should_initiate_conc_mark */ |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2529 g1_policy()->max_pause_time_ms(), |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2530 cause); |
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2531 |
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2532 VMThread::execute(&op); |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2533 if (!op.pause_succeeded()) { |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2534 if (old_marking_count_before == _old_marking_cycles_started) { |
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2535 retry_gc = op.should_retry_gc(); |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2536 } else { |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2537 // A Full GC happened while we were trying to schedule the |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2538 // initial-mark GC. No point in starting a new cycle given |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2539 // that the whole heap was collected anyway. |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2540 } |
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2541 |
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2542 if (retry_gc) { |
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2543 if (GC_locker::is_active_and_needs_gc()) { |
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2544 GC_locker::stall_until_clear(); |
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2545 } |
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2546 } |
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2547 } |
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2548 } else { |
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2549 if (cause == GCCause::_gc_locker |
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2550 DEBUG_ONLY(|| cause == GCCause::_scavenge_alot)) { |
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2551 |
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2552 // Schedule a standard evacuation pause. We're setting word_size |
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2553 // to 0 which means that we are not requesting a post-GC allocation. |
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2554 VM_G1IncCollectionPause op(gc_count_before, |
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2555 0, /* word_size */ |
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2556 false, /* should_initiate_conc_mark */ |
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2557 g1_policy()->max_pause_time_ms(), |
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2558 cause); |
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2559 VMThread::execute(&op); |
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2560 } else { |
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2561 // Schedule a Full GC. |
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2562 VM_G1CollectFull op(gc_count_before, old_marking_count_before, cause); |
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2563 VMThread::execute(&op); |
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2564 } |
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2565 } |
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2566 } while (retry_gc); |
342 | 2567 } |
2568 | |
2569 bool G1CollectedHeap::is_in(const void* p) const { | |
4708 | 2570 if (_g1_committed.contains(p)) { |
2571 // Given that we know that p is in the committed space, | |
2572 // heap_region_containing_raw() should successfully | |
2573 // return the containing region. | |
2574 HeapRegion* hr = heap_region_containing_raw(p); | |
342 | 2575 return hr->is_in(p); |
2576 } else { | |
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2577 return false; |
342 | 2578 } |
2579 } | |
2580 | |
2581 // Iteration functions. | |
2582 | |
2583 // Iterates an OopClosure over all ref-containing fields of objects | |
2584 // within a HeapRegion. | |
2585 | |
2586 class IterateOopClosureRegionClosure: public HeapRegionClosure { | |
2587 MemRegion _mr; | |
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2588 ExtendedOopClosure* _cl; |
342 | 2589 public: |
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2590 IterateOopClosureRegionClosure(MemRegion mr, ExtendedOopClosure* cl) |
342 | 2591 : _mr(mr), _cl(cl) {} |
2592 bool doHeapRegion(HeapRegion* r) { | |
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2593 if (!r->continuesHumongous()) { |
342 | 2594 r->oop_iterate(_cl); |
2595 } | |
2596 return false; | |
2597 } | |
2598 }; | |
2599 | |
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2600 void G1CollectedHeap::oop_iterate(ExtendedOopClosure* cl) { |
342 | 2601 IterateOopClosureRegionClosure blk(_g1_committed, cl); |
3766 | 2602 heap_region_iterate(&blk); |
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2603 } |
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2604 |
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2605 void G1CollectedHeap::oop_iterate(MemRegion mr, ExtendedOopClosure* cl) { |
342 | 2606 IterateOopClosureRegionClosure blk(mr, cl); |
3766 | 2607 heap_region_iterate(&blk); |
342 | 2608 } |
2609 | |
2610 // Iterates an ObjectClosure over all objects within a HeapRegion. | |
2611 | |
2612 class IterateObjectClosureRegionClosure: public HeapRegionClosure { | |
2613 ObjectClosure* _cl; | |
2614 public: | |
2615 IterateObjectClosureRegionClosure(ObjectClosure* cl) : _cl(cl) {} | |
2616 bool doHeapRegion(HeapRegion* r) { | |
2617 if (! r->continuesHumongous()) { | |
2618 r->object_iterate(_cl); | |
2619 } | |
2620 return false; | |
2621 } | |
2622 }; | |
2623 | |
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2624 void G1CollectedHeap::object_iterate(ObjectClosure* cl) { |
342 | 2625 IterateObjectClosureRegionClosure blk(cl); |
3766 | 2626 heap_region_iterate(&blk); |
342 | 2627 } |
2628 | |
2629 // Calls a SpaceClosure on a HeapRegion. | |
2630 | |
2631 class SpaceClosureRegionClosure: public HeapRegionClosure { | |
2632 SpaceClosure* _cl; | |
2633 public: | |
2634 SpaceClosureRegionClosure(SpaceClosure* cl) : _cl(cl) {} | |
2635 bool doHeapRegion(HeapRegion* r) { | |
2636 _cl->do_space(r); | |
2637 return false; | |
2638 } | |
2639 }; | |
2640 | |
2641 void G1CollectedHeap::space_iterate(SpaceClosure* cl) { | |
2642 SpaceClosureRegionClosure blk(cl); | |
3766 | 2643 heap_region_iterate(&blk); |
342 | 2644 } |
2645 | |
3766 | 2646 void G1CollectedHeap::heap_region_iterate(HeapRegionClosure* cl) const { |
2647 _hrs.iterate(cl); | |
342 | 2648 } |
2649 | |
2650 void | |
2651 G1CollectedHeap::heap_region_par_iterate_chunked(HeapRegionClosure* cl, | |
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2652 uint worker_id, |
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2653 uint no_of_par_workers, |
342 | 2654 jint claim_value) { |
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2655 const uint regions = n_regions(); |
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2656 const uint max_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
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2657 no_of_par_workers : |
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2658 1); |
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|
2659 assert(UseDynamicNumberOfGCThreads || |
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2660 no_of_par_workers == workers()->total_workers(), |
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2661 "Non dynamic should use fixed number of workers"); |
355 | 2662 // try to spread out the starting points of the workers |
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2663 const HeapRegion* start_hr = |
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2664 start_region_for_worker(worker_id, no_of_par_workers); |
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2665 const uint start_index = start_hr->hrs_index(); |
355 | 2666 |
2667 // each worker will actually look at all regions | |
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2668 for (uint count = 0; count < regions; ++count) { |
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2669 const uint index = (start_index + count) % regions; |
355 | 2670 assert(0 <= index && index < regions, "sanity"); |
2671 HeapRegion* r = region_at(index); | |
2672 // we'll ignore "continues humongous" regions (we'll process them | |
2673 // when we come across their corresponding "start humongous" | |
2674 // region) and regions already claimed | |
2675 if (r->claim_value() == claim_value || r->continuesHumongous()) { | |
2676 continue; | |
2677 } | |
2678 // OK, try to claim it | |
342 | 2679 if (r->claimHeapRegion(claim_value)) { |
355 | 2680 // success! |
2681 assert(!r->continuesHumongous(), "sanity"); | |
2682 if (r->startsHumongous()) { | |
2683 // If the region is "starts humongous" we'll iterate over its | |
2684 // "continues humongous" first; in fact we'll do them | |
2685 // first. The order is important. In on case, calling the | |
2686 // closure on the "starts humongous" region might de-allocate | |
2687 // and clear all its "continues humongous" regions and, as a | |
2688 // result, we might end up processing them twice. So, we'll do | |
2689 // them first (notice: most closures will ignore them anyway) and | |
2690 // then we'll do the "starts humongous" region. | |
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2691 for (uint ch_index = index + 1; ch_index < regions; ++ch_index) { |
355 | 2692 HeapRegion* chr = region_at(ch_index); |
2693 | |
2694 // if the region has already been claimed or it's not | |
2695 // "continues humongous" we're done | |
2696 if (chr->claim_value() == claim_value || | |
2697 !chr->continuesHumongous()) { | |
2698 break; | |
2699 } | |
2700 | |
10405 | 2701 // No one should have claimed it directly. We can given |
355 | 2702 // that we claimed its "starts humongous" region. |
2703 assert(chr->claim_value() != claim_value, "sanity"); | |
2704 assert(chr->humongous_start_region() == r, "sanity"); | |
2705 | |
2706 if (chr->claimHeapRegion(claim_value)) { | |
10405 | 2707 // we should always be able to claim it; no one else should |
355 | 2708 // be trying to claim this region |
2709 | |
2710 bool res2 = cl->doHeapRegion(chr); | |
2711 assert(!res2, "Should not abort"); | |
2712 | |
2713 // Right now, this holds (i.e., no closure that actually | |
2714 // does something with "continues humongous" regions | |
2715 // clears them). We might have to weaken it in the future, | |
2716 // but let's leave these two asserts here for extra safety. | |
2717 assert(chr->continuesHumongous(), "should still be the case"); | |
2718 assert(chr->humongous_start_region() == r, "sanity"); | |
2719 } else { | |
2720 guarantee(false, "we should not reach here"); | |
2721 } | |
2722 } | |
2723 } | |
2724 | |
2725 assert(!r->continuesHumongous(), "sanity"); | |
2726 bool res = cl->doHeapRegion(r); | |
2727 assert(!res, "Should not abort"); | |
2728 } | |
2729 } | |
2730 } | |
2731 | |
390 | 2732 class ResetClaimValuesClosure: public HeapRegionClosure { |
2733 public: | |
2734 bool doHeapRegion(HeapRegion* r) { | |
2735 r->set_claim_value(HeapRegion::InitialClaimValue); | |
2736 return false; | |
2737 } | |
2738 }; | |
2739 | |
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2740 void G1CollectedHeap::reset_heap_region_claim_values() { |
390 | 2741 ResetClaimValuesClosure blk; |
2742 heap_region_iterate(&blk); | |
2743 } | |
2744 | |
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2745 void G1CollectedHeap::reset_cset_heap_region_claim_values() { |
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2746 ResetClaimValuesClosure blk; |
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2747 collection_set_iterate(&blk); |
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|
2748 } |
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2749 |
355 | 2750 #ifdef ASSERT |
2751 // This checks whether all regions in the heap have the correct claim | |
2752 // value. I also piggy-backed on this a check to ensure that the | |
2753 // humongous_start_region() information on "continues humongous" | |
2754 // regions is correct. | |
2755 | |
2756 class CheckClaimValuesClosure : public HeapRegionClosure { | |
2757 private: | |
2758 jint _claim_value; | |
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2759 uint _failures; |
355 | 2760 HeapRegion* _sh_region; |
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2761 |
355 | 2762 public: |
2763 CheckClaimValuesClosure(jint claim_value) : | |
2764 _claim_value(claim_value), _failures(0), _sh_region(NULL) { } | |
2765 bool doHeapRegion(HeapRegion* r) { | |
2766 if (r->claim_value() != _claim_value) { | |
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2767 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
355 | 2768 "claim value = %d, should be %d", |
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2769 HR_FORMAT_PARAMS(r), |
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2770 r->claim_value(), _claim_value); |
355 | 2771 ++_failures; |
2772 } | |
2773 if (!r->isHumongous()) { | |
2774 _sh_region = NULL; | |
2775 } else if (r->startsHumongous()) { | |
2776 _sh_region = r; | |
2777 } else if (r->continuesHumongous()) { | |
2778 if (r->humongous_start_region() != _sh_region) { | |
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2779 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
355 | 2780 "HS = "PTR_FORMAT", should be "PTR_FORMAT, |
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2781 HR_FORMAT_PARAMS(r), |
355 | 2782 r->humongous_start_region(), |
2783 _sh_region); | |
2784 ++_failures; | |
342 | 2785 } |
2786 } | |
355 | 2787 return false; |
2788 } | |
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2789 uint failures() { return _failures; } |
355 | 2790 }; |
2791 | |
2792 bool G1CollectedHeap::check_heap_region_claim_values(jint claim_value) { | |
2793 CheckClaimValuesClosure cl(claim_value); | |
2794 heap_region_iterate(&cl); | |
2795 return cl.failures() == 0; | |
2796 } | |
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2797 |
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2798 class CheckClaimValuesInCSetHRClosure: public HeapRegionClosure { |
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2799 private: |
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2800 jint _claim_value; |
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2801 uint _failures; |
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2802 |
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2803 public: |
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2804 CheckClaimValuesInCSetHRClosure(jint claim_value) : |
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2805 _claim_value(claim_value), _failures(0) { } |
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2806 |
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2807 uint failures() { return _failures; } |
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2808 |
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2809 bool doHeapRegion(HeapRegion* hr) { |
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2810 assert(hr->in_collection_set(), "how?"); |
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2811 assert(!hr->isHumongous(), "H-region in CSet"); |
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2812 if (hr->claim_value() != _claim_value) { |
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4095
diff
changeset
|
2813 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
|
2814 "claim value = %d, should be %d", |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2815 HR_FORMAT_PARAMS(hr), |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2816 hr->claim_value(), _claim_value); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2817 _failures += 1; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2818 } |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2819 return false; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2820 } |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2821 }; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2822 |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2823 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
|
2824 CheckClaimValuesInCSetHRClosure cl(claim_value); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2825 collection_set_iterate(&cl); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2826 return cl.failures() == 0; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2827 } |
355 | 2828 #endif // ASSERT |
342 | 2829 |
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2830 // 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
|
2831 // 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
|
2832 void G1CollectedHeap::clear_cset_start_regions() { |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2833 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
|
2834 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
|
2835 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2836 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
|
2837 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
|
2838 _worker_cset_start_region[i] = NULL; |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2839 _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
|
2840 } |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2841 } |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2842 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2843 // 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
|
2844 // 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
|
2845 HeapRegion* G1CollectedHeap::start_cset_region_for_worker(uint worker_i) { |
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2846 assert(get_gc_time_stamp() > 0, "should have been updated by now"); |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2847 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2848 HeapRegion* result = NULL; |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2849 unsigned gc_time_stamp = get_gc_time_stamp(); |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2850 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2851 if (_worker_cset_start_region_time_stamp[worker_i] == gc_time_stamp) { |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2852 // Cached starting region for current worker was set |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2853 // during the current pause - so it's valid. |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2854 // Note: the cached starting heap region may be NULL |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2855 // (when the collection set is empty). |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2856 result = _worker_cset_start_region[worker_i]; |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2857 assert(result == NULL || result->in_collection_set(), "sanity"); |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2858 return result; |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2859 } |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2860 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2861 // The cached entry was not valid so let's calculate |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2862 // a suitable starting heap region for this worker. |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2863 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2864 // We want the parallel threads to start their collection |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2865 // set iteration at different collection set regions to |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2866 // avoid contention. |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2867 // If we have: |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2868 // n collection set regions |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2869 // p threads |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2870 // Then thread t will start at region floor ((t * n) / p) |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2871 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2872 result = g1_policy()->collection_set(); |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2873 if (G1CollectedHeap::use_parallel_gc_threads()) { |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2874 uint cs_size = g1_policy()->cset_region_length(); |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
2875 uint active_workers = workers()->active_workers(); |
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2876 assert(UseDynamicNumberOfGCThreads || |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2877 active_workers == workers()->total_workers(), |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2878 "Unless dynamic should use total workers"); |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2879 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2880 uint end_ind = (cs_size * worker_i) / active_workers; |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2881 uint start_ind = 0; |
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2882 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2883 if (worker_i > 0 && |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2884 _worker_cset_start_region_time_stamp[worker_i - 1] == gc_time_stamp) { |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2885 // Previous workers starting region is valid |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2886 // so let's iterate from there |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2887 start_ind = (cs_size * (worker_i - 1)) / active_workers; |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2888 result = _worker_cset_start_region[worker_i - 1]; |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2889 } |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2890 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2891 for (uint i = start_ind; i < end_ind; i++) { |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2892 result = result->next_in_collection_set(); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2893 } |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2894 } |
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2895 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2896 // Note: the calculated starting heap region may be NULL |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2897 // (when the collection set is empty). |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2898 assert(result == NULL || result->in_collection_set(), "sanity"); |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2899 assert(_worker_cset_start_region_time_stamp[worker_i] != gc_time_stamp, |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2900 "should be updated only once per pause"); |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2901 _worker_cset_start_region[worker_i] = result; |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2902 OrderAccess::storestore(); |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2903 _worker_cset_start_region_time_stamp[worker_i] = gc_time_stamp; |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2904 return result; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2905 } |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2906 |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2907 HeapRegion* G1CollectedHeap::start_region_for_worker(uint worker_i, |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2908 uint no_of_par_workers) { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2909 uint worker_num = |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2910 G1CollectedHeap::use_parallel_gc_threads() ? no_of_par_workers : 1U; |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2911 assert(UseDynamicNumberOfGCThreads || |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2912 no_of_par_workers == workers()->total_workers(), |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2913 "Non dynamic should use fixed number of workers"); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2914 const uint start_index = n_regions() * worker_i / worker_num; |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2915 return region_at(start_index); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2916 } |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2917 |
342 | 2918 void G1CollectedHeap::collection_set_iterate(HeapRegionClosure* cl) { |
2919 HeapRegion* r = g1_policy()->collection_set(); | |
2920 while (r != NULL) { | |
2921 HeapRegion* next = r->next_in_collection_set(); | |
2922 if (cl->doHeapRegion(r)) { | |
2923 cl->incomplete(); | |
2924 return; | |
2925 } | |
2926 r = next; | |
2927 } | |
2928 } | |
2929 | |
2930 void G1CollectedHeap::collection_set_iterate_from(HeapRegion* r, | |
2931 HeapRegionClosure *cl) { | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2932 if (r == NULL) { |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2933 // The CSet is empty so there's nothing to do. |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2934 return; |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2935 } |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2936 |
342 | 2937 assert(r->in_collection_set(), |
2938 "Start region must be a member of the collection set."); | |
2939 HeapRegion* cur = r; | |
2940 while (cur != NULL) { | |
2941 HeapRegion* next = cur->next_in_collection_set(); | |
2942 if (cl->doHeapRegion(cur) && false) { | |
2943 cl->incomplete(); | |
2944 return; | |
2945 } | |
2946 cur = next; | |
2947 } | |
2948 cur = g1_policy()->collection_set(); | |
2949 while (cur != r) { | |
2950 HeapRegion* next = cur->next_in_collection_set(); | |
2951 if (cl->doHeapRegion(cur) && false) { | |
2952 cl->incomplete(); | |
2953 return; | |
2954 } | |
2955 cur = next; | |
2956 } | |
2957 } | |
2958 | |
2959 CompactibleSpace* G1CollectedHeap::first_compactible_space() { | |
3766 | 2960 return n_regions() > 0 ? region_at(0) : NULL; |
342 | 2961 } |
2962 | |
2963 | |
2964 Space* G1CollectedHeap::space_containing(const void* addr) const { | |
2965 Space* res = heap_region_containing(addr); | |
2966 return res; | |
2967 } | |
2968 | |
2969 HeapWord* G1CollectedHeap::block_start(const void* addr) const { | |
2970 Space* sp = space_containing(addr); | |
2971 if (sp != NULL) { | |
2972 return sp->block_start(addr); | |
2973 } | |
2974 return NULL; | |
2975 } | |
2976 | |
2977 size_t G1CollectedHeap::block_size(const HeapWord* addr) const { | |
2978 Space* sp = space_containing(addr); | |
2979 assert(sp != NULL, "block_size of address outside of heap"); | |
2980 return sp->block_size(addr); | |
2981 } | |
2982 | |
2983 bool G1CollectedHeap::block_is_obj(const HeapWord* addr) const { | |
2984 Space* sp = space_containing(addr); | |
2985 return sp->block_is_obj(addr); | |
2986 } | |
2987 | |
2988 bool G1CollectedHeap::supports_tlab_allocation() const { | |
2989 return true; | |
2990 } | |
2991 | |
2992 size_t G1CollectedHeap::tlab_capacity(Thread* ignored) const { | |
17727 | 2993 return (_g1_policy->young_list_target_length() - young_list()->survivor_length()) * HeapRegion::GrainBytes; |
2994 } | |
2995 | |
2996 size_t G1CollectedHeap::tlab_used(Thread* ignored) const { | |
2997 return young_list()->eden_used_bytes(); | |
2998 } | |
2999 | |
3000 // For G1 TLABs should not contain humongous objects, so the maximum TLAB size | |
3001 // must be smaller than the humongous object limit. | |
3002 size_t G1CollectedHeap::max_tlab_size() const { | |
3003 return align_size_down(_humongous_object_threshold_in_words - 1, MinObjAlignment); | |
342 | 3004 } |
3005 | |
3006 size_t G1CollectedHeap::unsafe_max_tlab_alloc(Thread* ignored) const { | |
3007 // Return the remaining space in the cur alloc region, but not less than | |
3008 // the min TLAB size. | |
1313
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3009 |
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|
3010 // Also, this value can be at most the humongous object threshold, |
10405 | 3011 // since we can't allow tlabs to grow big enough to accommodate |
1313
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3012 // humongous objects. |
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|
3013 |
2433
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|
3014 HeapRegion* hr = _mutator_alloc_region.get(); |
17727 | 3015 size_t max_tlab = max_tlab_size() * wordSize; |
2433
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3016 if (hr == NULL) { |
17727 | 3017 return max_tlab; |
342 | 3018 } else { |
17727 | 3019 return MIN2(MAX2(hr->free(), (size_t) MinTLABSize), max_tlab); |
342 | 3020 } |
3021 } | |
3022 | |
3023 size_t G1CollectedHeap::max_capacity() const { | |
2188
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|
3024 return _g1_reserved.byte_size(); |
342 | 3025 } |
3026 | |
3027 jlong G1CollectedHeap::millis_since_last_gc() { | |
3028 // assert(false, "NYI"); | |
3029 return 0; | |
3030 } | |
3031 | |
3032 void G1CollectedHeap::prepare_for_verify() { | |
3033 if (SafepointSynchronize::is_at_safepoint() || ! UseTLAB) { | |
3034 ensure_parsability(false); | |
3035 } | |
3036 g1_rem_set()->prepare_for_verify(); | |
3037 } | |
3038 | |
6254
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3039 bool G1CollectedHeap::allocated_since_marking(oop obj, HeapRegion* hr, |
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3040 VerifyOption vo) { |
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3041 switch (vo) { |
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3042 case VerifyOption_G1UsePrevMarking: |
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3043 return hr->obj_allocated_since_prev_marking(obj); |
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3044 case VerifyOption_G1UseNextMarking: |
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3045 return hr->obj_allocated_since_next_marking(obj); |
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3046 case VerifyOption_G1UseMarkWord: |
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3047 return false; |
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|
3048 default: |
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|
3049 ShouldNotReachHere(); |
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3050 } |
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3051 return false; // keep some compilers happy |
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|
3052 } |
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3053 |
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3054 HeapWord* G1CollectedHeap::top_at_mark_start(HeapRegion* hr, VerifyOption vo) { |
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3055 switch (vo) { |
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3056 case VerifyOption_G1UsePrevMarking: return hr->prev_top_at_mark_start(); |
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3057 case VerifyOption_G1UseNextMarking: return hr->next_top_at_mark_start(); |
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3058 case VerifyOption_G1UseMarkWord: return NULL; |
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3059 default: ShouldNotReachHere(); |
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3060 } |
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3061 return NULL; // keep some compilers happy |
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|
3062 } |
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3063 |
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3064 bool G1CollectedHeap::is_marked(oop obj, VerifyOption vo) { |
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3065 switch (vo) { |
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3066 case VerifyOption_G1UsePrevMarking: return isMarkedPrev(obj); |
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3067 case VerifyOption_G1UseNextMarking: return isMarkedNext(obj); |
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3068 case VerifyOption_G1UseMarkWord: return obj->is_gc_marked(); |
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3069 default: ShouldNotReachHere(); |
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3070 } |
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3071 return false; // keep some compilers happy |
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|
3072 } |
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|
3073 |
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3074 const char* G1CollectedHeap::top_at_mark_start_str(VerifyOption vo) { |
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3075 switch (vo) { |
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|
3076 case VerifyOption_G1UsePrevMarking: return "PTAMS"; |
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3077 case VerifyOption_G1UseNextMarking: return "NTAMS"; |
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3078 case VerifyOption_G1UseMarkWord: return "NONE"; |
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3079 default: ShouldNotReachHere(); |
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|
3080 } |
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3081 return NULL; // keep some compilers happy |
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|
3082 } |
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|
3083 |
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|
3084 class VerifyRootsClosure: public OopClosure { |
12080 | 3085 private: |
3086 G1CollectedHeap* _g1h; | |
3087 VerifyOption _vo; | |
3088 bool _failures; | |
3089 public: | |
3090 // _vo == UsePrevMarking -> use "prev" marking information, | |
3091 // _vo == UseNextMarking -> use "next" marking information, | |
3092 // _vo == UseMarkWord -> use mark word from object header. | |
3093 VerifyRootsClosure(VerifyOption vo) : | |
3094 _g1h(G1CollectedHeap::heap()), | |
3095 _vo(vo), | |
3096 _failures(false) { } | |
3097 | |
3098 bool failures() { return _failures; } | |
3099 | |
3100 template <class T> void do_oop_nv(T* p) { | |
3101 T heap_oop = oopDesc::load_heap_oop(p); | |
3102 if (!oopDesc::is_null(heap_oop)) { | |
3103 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
3104 if (_g1h->is_obj_dead_cond(obj, _vo)) { | |
3105 gclog_or_tty->print_cr("Root location "PTR_FORMAT" " | |
3106 "points to dead obj "PTR_FORMAT, p, (void*) obj); | |
3107 if (_vo == VerifyOption_G1UseMarkWord) { | |
3108 gclog_or_tty->print_cr(" Mark word: "PTR_FORMAT, (void*)(obj->mark())); | |
3109 } | |
3110 obj->print_on(gclog_or_tty); | |
3111 _failures = true; | |
3112 } | |
3113 } | |
3114 } | |
3115 | |
3116 void do_oop(oop* p) { do_oop_nv(p); } | |
3117 void do_oop(narrowOop* p) { do_oop_nv(p); } | |
3118 }; | |
3119 | |
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3120 class G1VerifyCodeRootOopClosure: public OopClosure { |
12080 | 3121 G1CollectedHeap* _g1h; |
3122 OopClosure* _root_cl; | |
3123 nmethod* _nm; | |
3124 VerifyOption _vo; | |
3125 bool _failures; | |
3126 | |
3127 template <class T> void do_oop_work(T* p) { | |
3128 // First verify that this root is live | |
3129 _root_cl->do_oop(p); | |
3130 | |
3131 if (!G1VerifyHeapRegionCodeRoots) { | |
3132 // We're not verifying the code roots attached to heap region. | |
3133 return; | |
3134 } | |
3135 | |
3136 // Don't check the code roots during marking verification in a full GC | |
3137 if (_vo == VerifyOption_G1UseMarkWord) { | |
3138 return; | |
3139 } | |
3140 | |
3141 // Now verify that the current nmethod (which contains p) is | |
3142 // in the code root list of the heap region containing the | |
3143 // object referenced by p. | |
3144 | |
3145 T heap_oop = oopDesc::load_heap_oop(p); | |
3146 if (!oopDesc::is_null(heap_oop)) { | |
3147 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
3148 | |
3149 // Now fetch the region containing the object | |
3150 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
3151 HeapRegionRemSet* hrrs = hr->rem_set(); | |
3152 // Verify that the strong code root list for this region | |
3153 // contains the nmethod | |
3154 if (!hrrs->strong_code_roots_list_contains(_nm)) { | |
3155 gclog_or_tty->print_cr("Code root location "PTR_FORMAT" " | |
3156 "from nmethod "PTR_FORMAT" not in strong " | |
3157 "code roots for region ["PTR_FORMAT","PTR_FORMAT")", | |
3158 p, _nm, hr->bottom(), hr->end()); | |
3159 _failures = true; | |
3160 } | |
3161 } | |
3162 } | |
3163 | |
3164 public: | |
3165 G1VerifyCodeRootOopClosure(G1CollectedHeap* g1h, OopClosure* root_cl, VerifyOption vo): | |
3166 _g1h(g1h), _root_cl(root_cl), _vo(vo), _nm(NULL), _failures(false) {} | |
3167 | |
3168 void do_oop(oop* p) { do_oop_work(p); } | |
3169 void do_oop(narrowOop* p) { do_oop_work(p); } | |
3170 | |
3171 void set_nmethod(nmethod* nm) { _nm = nm; } | |
3172 bool failures() { return _failures; } | |
3173 }; | |
3174 | |
3175 class G1VerifyCodeRootBlobClosure: public CodeBlobClosure { | |
3176 G1VerifyCodeRootOopClosure* _oop_cl; | |
3177 | |
3178 public: | |
3179 G1VerifyCodeRootBlobClosure(G1VerifyCodeRootOopClosure* oop_cl): | |
3180 _oop_cl(oop_cl) {} | |
3181 | |
3182 void do_code_blob(CodeBlob* cb) { | |
3183 nmethod* nm = cb->as_nmethod_or_null(); | |
3184 if (nm != NULL) { | |
3185 _oop_cl->set_nmethod(nm); | |
3186 nm->oops_do(_oop_cl); | |
3187 } | |
3188 } | |
3189 }; | |
3190 | |
3191 class YoungRefCounterClosure : public OopClosure { | |
3192 G1CollectedHeap* _g1h; | |
3193 int _count; | |
3194 public: | |
3195 YoungRefCounterClosure(G1CollectedHeap* g1h) : _g1h(g1h), _count(0) {} | |
3196 void do_oop(oop* p) { if (_g1h->is_in_young(*p)) { _count++; } } | |
3197 void do_oop(narrowOop* p) { ShouldNotReachHere(); } | |
3198 | |
3199 int count() { return _count; } | |
3200 void reset_count() { _count = 0; }; | |
3201 }; | |
3202 | |
3203 class VerifyKlassClosure: public KlassClosure { | |
3204 YoungRefCounterClosure _young_ref_counter_closure; | |
3205 OopClosure *_oop_closure; | |
3206 public: | |
3207 VerifyKlassClosure(G1CollectedHeap* g1h, OopClosure* cl) : _young_ref_counter_closure(g1h), _oop_closure(cl) {} | |
3208 void do_klass(Klass* k) { | |
3209 k->oops_do(_oop_closure); | |
3210 | |
3211 _young_ref_counter_closure.reset_count(); | |
3212 k->oops_do(&_young_ref_counter_closure); | |
3213 if (_young_ref_counter_closure.count() > 0) { | |
3214 guarantee(k->has_modified_oops(), err_msg("Klass %p, has young refs but is not dirty.", k)); | |
3215 } | |
3216 } | |
3217 }; | |
3218 | |
342 | 3219 class VerifyLivenessOopClosure: public OopClosure { |
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3220 G1CollectedHeap* _g1h; |
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3221 VerifyOption _vo; |
342 | 3222 public: |
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3223 VerifyLivenessOopClosure(G1CollectedHeap* g1h, VerifyOption vo): |
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3224 _g1h(g1h), _vo(vo) |
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3225 { } |
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|
3226 void do_oop(narrowOop *p) { do_oop_work(p); } |
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3227 void do_oop( oop *p) { do_oop_work(p); } |
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|
3228 |
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|
3229 template <class T> void do_oop_work(T *p) { |
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3230 oop obj = oopDesc::load_decode_heap_oop(p); |
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|
3231 guarantee(obj == NULL || !_g1h->is_obj_dead_cond(obj, _vo), |
845
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|
3232 "Dead object referenced by a not dead object"); |
342 | 3233 } |
3234 }; | |
3235 | |
3236 class VerifyObjsInRegionClosure: public ObjectClosure { | |
811 | 3237 private: |
342 | 3238 G1CollectedHeap* _g1h; |
3239 size_t _live_bytes; | |
3240 HeapRegion *_hr; | |
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|
3241 VerifyOption _vo; |
342 | 3242 public: |
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|
3243 // _vo == UsePrevMarking -> use "prev" marking information, |
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3244 // _vo == UseNextMarking -> use "next" marking information, |
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3245 // _vo == UseMarkWord -> use mark word from object header. |
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|
3246 VerifyObjsInRegionClosure(HeapRegion *hr, VerifyOption vo) |
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3247 : _live_bytes(0), _hr(hr), _vo(vo) { |
342 | 3248 _g1h = G1CollectedHeap::heap(); |
3249 } | |
3250 void do_object(oop o) { | |
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|
3251 VerifyLivenessOopClosure isLive(_g1h, _vo); |
342 | 3252 assert(o != NULL, "Huh?"); |
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3253 if (!_g1h->is_obj_dead_cond(o, _vo)) { |
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3254 // If the object is alive according to the mark word, |
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changeset
|
3255 // then verify that the marking information agrees. |
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3256 // Note we can't verify the contra-positive of the |
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|
3257 // above: if the object is dead (according to the mark |
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|
3258 // word), it may not be marked, or may have been marked |
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|
3259 // but has since became dead, or may have been allocated |
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|
3260 // since the last marking. |
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|
3261 if (_vo == VerifyOption_G1UseMarkWord) { |
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|
3262 guarantee(!_g1h->is_obj_dead(o), "mark word and concurrent mark mismatch"); |
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|
3263 } |
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|
3264 |
6725
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|
3265 o->oop_iterate_no_header(&isLive); |
1389
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|
3266 if (!_hr->obj_allocated_since_prev_marking(o)) { |
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3267 size_t obj_size = o->size(); // Make sure we don't overflow |
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3268 _live_bytes += (obj_size * HeapWordSize); |
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|
3269 } |
342 | 3270 } |
3271 } | |
3272 size_t live_bytes() { return _live_bytes; } | |
3273 }; | |
3274 | |
3275 class PrintObjsInRegionClosure : public ObjectClosure { | |
3276 HeapRegion *_hr; | |
3277 G1CollectedHeap *_g1; | |
3278 public: | |
3279 PrintObjsInRegionClosure(HeapRegion *hr) : _hr(hr) { | |
3280 _g1 = G1CollectedHeap::heap(); | |
3281 }; | |
3282 | |
3283 void do_object(oop o) { | |
3284 if (o != NULL) { | |
3285 HeapWord *start = (HeapWord *) o; | |
3286 size_t word_sz = o->size(); | |
3287 gclog_or_tty->print("\nPrinting obj "PTR_FORMAT" of size " SIZE_FORMAT | |
3288 " isMarkedPrev %d isMarkedNext %d isAllocSince %d\n", | |
3289 (void*) o, word_sz, | |
3290 _g1->isMarkedPrev(o), | |
3291 _g1->isMarkedNext(o), | |
3292 _hr->obj_allocated_since_prev_marking(o)); | |
3293 HeapWord *end = start + word_sz; | |
3294 HeapWord *cur; | |
3295 int *val; | |
3296 for (cur = start; cur < end; cur++) { | |
3297 val = (int *) cur; | |
3298 gclog_or_tty->print("\t "PTR_FORMAT":"PTR_FORMAT"\n", val, *val); | |
3299 } | |
3300 } | |
3301 } | |
3302 }; | |
3303 | |
3304 class VerifyRegionClosure: public HeapRegionClosure { | |
811 | 3305 private: |
6254
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
3306 bool _par; |
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|
3307 VerifyOption _vo; |
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|
3308 bool _failures; |
811 | 3309 public: |
3772
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3310 // _vo == UsePrevMarking -> use "prev" marking information, |
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3311 // _vo == UseNextMarking -> use "next" marking information, |
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|
3312 // _vo == UseMarkWord -> use mark word from object header. |
6008 | 3313 VerifyRegionClosure(bool par, VerifyOption vo) |
3314 : _par(par), | |
3772
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|
3315 _vo(vo), |
1020
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|
3316 _failures(false) {} |
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|
3317 |
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|
3318 bool failures() { |
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|
3319 return _failures; |
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|
3320 } |
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|
3321 |
342 | 3322 bool doHeapRegion(HeapRegion* r) { |
637
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|
3323 if (!r->continuesHumongous()) { |
1020
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|
3324 bool failures = false; |
6008 | 3325 r->verify(_vo, &failures); |
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|
3326 if (failures) { |
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|
3327 _failures = true; |
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|
3328 } else { |
3772
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|
3329 VerifyObjsInRegionClosure not_dead_yet_cl(r, _vo); |
1020
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|
3330 r->object_iterate(¬_dead_yet_cl); |
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|
3331 if (_vo != VerifyOption_G1UseNextMarking) { |
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|
3332 if (r->max_live_bytes() < not_dead_yet_cl.live_bytes()) { |
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|
3333 gclog_or_tty->print_cr("["PTR_FORMAT","PTR_FORMAT"] " |
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|
3334 "max_live_bytes "SIZE_FORMAT" " |
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diff
changeset
|
3335 "< calculated "SIZE_FORMAT, |
2ace1c4ee8da
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diff
changeset
|
3336 r->bottom(), r->end(), |
2ace1c4ee8da
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|
3337 r->max_live_bytes(), |
1020
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|
3338 not_dead_yet_cl.live_bytes()); |
4787
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diff
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|
3339 _failures = true; |
2ace1c4ee8da
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diff
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|
3340 } |
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diff
changeset
|
3341 } else { |
2ace1c4ee8da
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diff
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|
3342 // When vo == UseNextMarking we cannot currently do a sanity |
2ace1c4ee8da
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diff
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|
3343 // check on the live bytes as the calculation has not been |
2ace1c4ee8da
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diff
changeset
|
3344 // finalized yet. |
1020
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|
3345 } |
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|
3346 } |
342 | 3347 } |
1020
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diff
changeset
|
3348 return false; // stop the region iteration if we hit a failure |
342 | 3349 } |
3350 }; | |
3351 | |
12080 | 3352 // This is the task used for parallel verification of the heap regions |
390 | 3353 |
3354 class G1ParVerifyTask: public AbstractGangTask { | |
3355 private: | |
3356 G1CollectedHeap* _g1h; | |
3772
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7004681: G1: Extend marking verification to Full GCs
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|
3357 VerifyOption _vo; |
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|
3358 bool _failures; |
390 | 3359 |
3360 public: | |
3772
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changeset
|
3361 // _vo == UsePrevMarking -> use "prev" marking information, |
6747fd0512e0
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|
3362 // _vo == UseNextMarking -> use "next" marking information, |
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|
3363 // _vo == UseMarkWord -> use mark word from object header. |
6008 | 3364 G1ParVerifyTask(G1CollectedHeap* g1h, VerifyOption vo) : |
390 | 3365 AbstractGangTask("Parallel verify task"), |
845
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6700789: G1: Enable use of compressed oops with G1 heaps
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|
3366 _g1h(g1h), |
3772
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diff
changeset
|
3367 _vo(vo), |
1020
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diff
changeset
|
3368 _failures(false) { } |
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|
3369 |
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diff
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|
3370 bool failures() { |
ff2402f6a50b
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parents:
1019
diff
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|
3371 return _failures; |
ff2402f6a50b
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1019
diff
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|
3372 } |
390 | 3373 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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4711
diff
changeset
|
3374 void work(uint worker_id) { |
637
25e146966e7c
6817419: G1: Enable extensive verification for humongous regions
iveresov
parents:
636
diff
changeset
|
3375 HandleMark hm; |
6008 | 3376 VerifyRegionClosure blk(true, _vo); |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
3377 _g1h->heap_region_par_iterate_chunked(&blk, worker_id, |
4095
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6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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4090
diff
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|
3378 _g1h->workers()->active_workers(), |
390 | 3379 HeapRegion::ParVerifyClaimValue); |
1020
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6882730: G1: parallel heap verification messes up region dump
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parents:
1019
diff
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|
3380 if (blk.failures()) { |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3381 _failures = true; |
ff2402f6a50b
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parents:
1019
diff
changeset
|
3382 } |
390 | 3383 } |
3384 }; | |
3385 | |
12080 | 3386 void G1CollectedHeap::verify(bool silent, VerifyOption vo) { |
8855
24ef5fb05e0f
8010463: G1: Crashes with -UseTLAB and heap verification
johnc
parents:
8853
diff
changeset
|
3387 if (SafepointSynchronize::is_at_safepoint()) { |
12080 | 3388 assert(Thread::current()->is_VM_thread(), |
3389 "Expected to be executed serially by the VM thread at this point"); | |
3390 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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|
3391 if (!silent) { gclog_or_tty->print("Roots "); } |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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parents:
3766
diff
changeset
|
3392 VerifyRootsClosure rootsCl(vo); |
12080 | 3393 G1VerifyCodeRootOopClosure codeRootsCl(this, &rootsCl, vo); |
3394 G1VerifyCodeRootBlobClosure blobsCl(&codeRootsCl); | |
6725
da91efe96a93
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|
3395 VerifyKlassClosure klassCl(this, &rootsCl); |
3772
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diff
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|
3396 |
3293
1f4413413144
7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
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3289
diff
changeset
|
3397 // We apply the relevant closures to all the oops in the |
1f4413413144
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3289
diff
changeset
|
3398 // system dictionary, the string table and the code cache. |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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diff
changeset
|
3399 const int so = SO_AllClasses | SO_Strings | SO_CodeCache; |
3772
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|
3400 |
6725
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|
3401 // Need cleared claim bits for the strong roots processing |
da91efe96a93
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|
3402 ClassLoaderDataGraph::clear_claimed_marks(); |
da91efe96a93
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|
3403 |
3293
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diff
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|
3404 process_strong_roots(true, // activate StrongRootsScope |
6725
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|
3405 false, // we set "is scavenging" to false, |
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|
3406 // so we don't reset the dirty cards. |
4910
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7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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|
3407 ScanningOption(so), // roots scanning options |
342 | 3408 &rootsCl, |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
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|
3409 &blobsCl, |
6725
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|
3410 &klassCl |
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|
3411 ); |
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|
3412 |
12080 | 3413 bool failures = rootsCl.failures() || codeRootsCl.failures(); |
3772
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|
3414 |
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|
3415 if (vo != VerifyOption_G1UseMarkWord) { |
6747fd0512e0
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|
3416 // If we're verifying during a full GC then the region sets |
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|
3417 // will have been torn down at the start of the GC. Therefore |
6747fd0512e0
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diff
changeset
|
3418 // verifying the region sets will fail. So we only verify |
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diff
changeset
|
3419 // the region sets when not in a full GC. |
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3766
diff
changeset
|
3420 if (!silent) { gclog_or_tty->print("HeapRegionSets "); } |
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3766
diff
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|
3421 verify_region_sets(); |
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3766
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|
3422 } |
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|
3423 |
2152 | 3424 if (!silent) { gclog_or_tty->print("HeapRegions "); } |
390 | 3425 if (GCParallelVerificationEnabled && ParallelGCThreads > 1) { |
3426 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
3427 "sanity check"); | |
3428 | |
6008 | 3429 G1ParVerifyTask task(this, vo); |
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|
3430 assert(UseDynamicNumberOfGCThreads || |
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|
3431 workers()->active_workers() == workers()->total_workers(), |
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|
3432 "If not dynamic should be using all the workers"); |
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diff
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|
3433 int n_workers = workers()->active_workers(); |
390 | 3434 set_par_threads(n_workers); |
3435 workers()->run_task(&task); | |
3436 set_par_threads(0); | |
1020
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|
3437 if (task.failures()) { |
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|
3438 failures = true; |
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|
3439 } |
390 | 3440 |
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|
3441 // Checks that the expected amount of parallel work was done. |
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|
3442 // The implication is that n_workers is > 0. |
390 | 3443 assert(check_heap_region_claim_values(HeapRegion::ParVerifyClaimValue), |
3444 "sanity check"); | |
3445 | |
3446 reset_heap_region_claim_values(); | |
3447 | |
3448 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
3449 "sanity check"); | |
3450 } else { | |
6008 | 3451 VerifyRegionClosure blk(false, vo); |
3766 | 3452 heap_region_iterate(&blk); |
1020
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|
3453 if (blk.failures()) { |
ff2402f6a50b
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|
3454 failures = true; |
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diff
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|
3455 } |
390 | 3456 } |
2152 | 3457 if (!silent) gclog_or_tty->print("RemSet "); |
342 | 3458 rem_set()->verify(); |
1020
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|
3459 |
17764 | 3460 if (G1StringDedup::is_enabled()) { |
3461 if (!silent) gclog_or_tty->print("StrDedup "); | |
3462 G1StringDedup::verify(); | |
3463 } | |
3464 | |
1020
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|
3465 if (failures) { |
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changeset
|
3466 gclog_or_tty->print_cr("Heap:"); |
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
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4072
diff
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|
3467 // It helps to have the per-region information in the output to |
53074c2c4600
7099849: G1: include heap region information in hs_err files
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diff
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|
3468 // help us track down what went wrong. This is why we call |
53074c2c4600
7099849: G1: include heap region information in hs_err files
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diff
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|
3469 // print_extended_on() instead of print_on(). |
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|
3470 print_extended_on(gclog_or_tty); |
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17935
diff
changeset
|
3471 gclog_or_tty->cr(); |
1547
fb1a39993f69
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
1545
diff
changeset
|
3472 #ifndef PRODUCT |
1044 | 3473 if (VerifyDuringGC && G1VerifyDuringGCPrintReachable) { |
1388 | 3474 concurrent_mark()->print_reachable("at-verification-failure", |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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3766
diff
changeset
|
3475 vo, false /* all */); |
1020
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|
3476 } |
1547
fb1a39993f69
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diff
changeset
|
3477 #endif |
1020
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changeset
|
3478 gclog_or_tty->flush(); |
ff2402f6a50b
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changeset
|
3479 } |
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|
3480 guarantee(!failures, "there should not have been any failures"); |
342 | 3481 } else { |
17764 | 3482 if (!silent) { |
3483 gclog_or_tty->print("(SKIPPING Roots, HeapRegionSets, HeapRegions, RemSet"); | |
3484 if (G1StringDedup::is_enabled()) { | |
3485 gclog_or_tty->print(", StrDedup"); | |
3486 } | |
3487 gclog_or_tty->print(") "); | |
3488 } | |
342 | 3489 } |
3490 } | |
3491 | |
12080 | 3492 void G1CollectedHeap::verify(bool silent) { |
3493 verify(silent, VerifyOption_G1UsePrevMarking); | |
3494 } | |
3495 | |
3496 double G1CollectedHeap::verify(bool guard, const char* msg) { | |
3497 double verify_time_ms = 0.0; | |
3498 | |
3499 if (guard && total_collections() >= VerifyGCStartAt) { | |
3500 double verify_start = os::elapsedTime(); | |
3501 HandleMark hm; // Discard invalid handles created during verification | |
3502 prepare_for_verify(); | |
3503 Universe::verify(VerifyOption_G1UsePrevMarking, msg); | |
3504 verify_time_ms = (os::elapsedTime() - verify_start) * 1000; | |
3505 } | |
3506 | |
3507 return verify_time_ms; | |
3508 } | |
3509 | |
3510 void G1CollectedHeap::verify_before_gc() { | |
3511 double verify_time_ms = verify(VerifyBeforeGC, " VerifyBeforeGC:"); | |
3512 g1_policy()->phase_times()->record_verify_before_time_ms(verify_time_ms); | |
3513 } | |
3514 | |
3515 void G1CollectedHeap::verify_after_gc() { | |
3516 double verify_time_ms = verify(VerifyAfterGC, " VerifyAfterGC:"); | |
3517 g1_policy()->phase_times()->record_verify_after_time_ms(verify_time_ms); | |
3518 } | |
3519 | |
342 | 3520 class PrintRegionClosure: public HeapRegionClosure { |
3521 outputStream* _st; | |
3522 public: | |
3523 PrintRegionClosure(outputStream* st) : _st(st) {} | |
3524 bool doHeapRegion(HeapRegion* r) { | |
3525 r->print_on(_st); | |
3526 return false; | |
3527 } | |
3528 }; | |
3529 | |
17833
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|
3530 bool G1CollectedHeap::is_obj_dead_cond(const oop obj, |
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8038498: Fix includes and C inlining after 8035330
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|
3531 const HeapRegion* hr, |
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8038498: Fix includes and C inlining after 8035330
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changeset
|
3532 const VerifyOption vo) const { |
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8038498: Fix includes and C inlining after 8035330
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|
3533 switch (vo) { |
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8038498: Fix includes and C inlining after 8035330
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|
3534 case VerifyOption_G1UsePrevMarking: return is_obj_dead(obj, hr); |
bfdf528be8e8
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diff
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|
3535 case VerifyOption_G1UseNextMarking: return is_obj_ill(obj, hr); |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
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|
3536 case VerifyOption_G1UseMarkWord: return !obj->is_gc_marked(); |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
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diff
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|
3537 default: ShouldNotReachHere(); |
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diff
changeset
|
3538 } |
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8038498: Fix includes and C inlining after 8035330
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diff
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|
3539 return false; // keep some compilers happy |
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8038498: Fix includes and C inlining after 8035330
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diff
changeset
|
3540 } |
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|
3541 |
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diff
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|
3542 bool G1CollectedHeap::is_obj_dead_cond(const oop obj, |
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diff
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|
3543 const VerifyOption vo) const { |
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|
3544 switch (vo) { |
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|
3545 case VerifyOption_G1UsePrevMarking: return is_obj_dead(obj); |
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|
3546 case VerifyOption_G1UseNextMarking: return is_obj_ill(obj); |
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|
3547 case VerifyOption_G1UseMarkWord: return !obj->is_gc_marked(); |
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diff
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|
3548 default: ShouldNotReachHere(); |
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|
3549 } |
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|
3550 return false; // keep some compilers happy |
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|
3551 } |
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|
3552 |
342 | 3553 void G1CollectedHeap::print_on(outputStream* st) const { |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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diff
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|
3554 st->print(" %-20s", "garbage-first heap"); |
0316eac49d5a
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diff
changeset
|
3555 st->print(" total " SIZE_FORMAT "K, used " SIZE_FORMAT "K", |
846
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
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845
diff
changeset
|
3556 capacity()/K, used_unlocked()/K); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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811
diff
changeset
|
3557 st->print(" [" INTPTR_FORMAT ", " INTPTR_FORMAT ", " INTPTR_FORMAT ")", |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
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|
3558 _g1_storage.low_boundary(), |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
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811
diff
changeset
|
3559 _g1_storage.high(), |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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811
diff
changeset
|
3560 _g1_storage.high_boundary()); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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diff
changeset
|
3561 st->cr(); |
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3983
diff
changeset
|
3562 st->print(" region size " SIZE_FORMAT "K, ", HeapRegion::GrainBytes / K); |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
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6008
diff
changeset
|
3563 uint young_regions = _young_list->length(); |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
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6008
diff
changeset
|
3564 st->print("%u young (" SIZE_FORMAT "K), ", young_regions, |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
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6008
diff
changeset
|
3565 (size_t) young_regions * HeapRegion::GrainBytes / K); |
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7157073: G1: type change size_t -> uint for region counts / indexes
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diff
changeset
|
3566 uint survivor_regions = g1_policy()->recorded_survivor_regions(); |
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7157073: G1: type change size_t -> uint for region counts / indexes
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6008
diff
changeset
|
3567 st->print("%u survivors (" SIZE_FORMAT "K)", survivor_regions, |
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7157073: G1: type change size_t -> uint for region counts / indexes
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6008
diff
changeset
|
3568 (size_t) survivor_regions * HeapRegion::GrainBytes / K); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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811
diff
changeset
|
3569 st->cr(); |
6863
04155d9c8c76
8000358: G1: metaspace information not printed in PrintHeapAtGC output nor in hs_err file
johnc
parents:
6819
diff
changeset
|
3570 MetaspaceAux::print_on(st); |
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
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4072
diff
changeset
|
3571 } |
53074c2c4600
7099849: G1: include heap region information in hs_err files
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4072
diff
changeset
|
3572 |
53074c2c4600
7099849: G1: include heap region information in hs_err files
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4072
diff
changeset
|
3573 void G1CollectedHeap::print_extended_on(outputStream* st) const { |
53074c2c4600
7099849: G1: include heap region information in hs_err files
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parents:
4072
diff
changeset
|
3574 print_on(st); |
53074c2c4600
7099849: G1: include heap region information in hs_err files
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4072
diff
changeset
|
3575 |
53074c2c4600
7099849: G1: include heap region information in hs_err files
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4072
diff
changeset
|
3576 // Print the per-region information. |
53074c2c4600
7099849: G1: include heap region information in hs_err files
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parents:
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diff
changeset
|
3577 st->cr(); |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
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6008
diff
changeset
|
3578 st->print_cr("Heap Regions: (Y=young(eden), SU=young(survivor), " |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
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diff
changeset
|
3579 "HS=humongous(starts), HC=humongous(continues), " |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
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6008
diff
changeset
|
3580 "CS=collection set, F=free, TS=gc time stamp, " |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
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6008
diff
changeset
|
3581 "PTAMS=previous top-at-mark-start, " |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
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6008
diff
changeset
|
3582 "NTAMS=next top-at-mark-start)"); |
342 | 3583 PrintRegionClosure blk(st); |
3766 | 3584 heap_region_iterate(&blk); |
342 | 3585 } |
3586 | |
9076
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3587 void G1CollectedHeap::print_on_error(outputStream* st) const { |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
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8855
diff
changeset
|
3588 this->CollectedHeap::print_on_error(st); |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
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8855
diff
changeset
|
3589 |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
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8855
diff
changeset
|
3590 if (_cm != NULL) { |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3591 st->cr(); |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
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8855
diff
changeset
|
3592 _cm->print_on_error(st); |
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8011872: Include Bit Map addresses in the hs_err files
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8855
diff
changeset
|
3593 } |
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8855
diff
changeset
|
3594 } |
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diff
changeset
|
3595 |
342 | 3596 void G1CollectedHeap::print_gc_threads_on(outputStream* st) const { |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
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1755
diff
changeset
|
3597 if (G1CollectedHeap::use_parallel_gc_threads()) { |
1019 | 3598 workers()->print_worker_threads_on(st); |
3599 } | |
3600 _cmThread->print_on(st); | |
342 | 3601 st->cr(); |
1019 | 3602 _cm->print_worker_threads_on(st); |
3603 _cg1r->print_worker_threads_on(st); | |
17764 | 3604 if (G1StringDedup::is_enabled()) { |
3605 G1StringDedup::print_worker_threads_on(st); | |
3606 } | |
342 | 3607 } |
3608 | |
3609 void G1CollectedHeap::gc_threads_do(ThreadClosure* tc) const { | |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
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1755
diff
changeset
|
3610 if (G1CollectedHeap::use_parallel_gc_threads()) { |
342 | 3611 workers()->threads_do(tc); |
3612 } | |
3613 tc->do_thread(_cmThread); | |
794 | 3614 _cg1r->threads_do(tc); |
17764 | 3615 if (G1StringDedup::is_enabled()) { |
3616 G1StringDedup::threads_do(tc); | |
3617 } | |
342 | 3618 } |
3619 | |
3620 void G1CollectedHeap::print_tracing_info() const { | |
3621 // We'll overload this to mean "trace GC pause statistics." | |
3622 if (TraceGen0Time || TraceGen1Time) { | |
3623 // The "G1CollectorPolicy" is keeping track of these stats, so delegate | |
3624 // to that. | |
3625 g1_policy()->print_tracing_info(); | |
3626 } | |
751 | 3627 if (G1SummarizeRSetStats) { |
342 | 3628 g1_rem_set()->print_summary_info(); |
3629 } | |
1282 | 3630 if (G1SummarizeConcMark) { |
342 | 3631 concurrent_mark()->print_summary_info(); |
3632 } | |
3633 g1_policy()->print_yg_surv_rate_info(); | |
3634 SpecializationStats::print(); | |
3635 } | |
3636 | |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
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3774
diff
changeset
|
3637 #ifndef PRODUCT |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
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3774
diff
changeset
|
3638 // Helpful for debugging RSet issues. |
e8b0b0392037
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tonyp
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3774
diff
changeset
|
3639 |
e8b0b0392037
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tonyp
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diff
changeset
|
3640 class PrintRSetsClosure : public HeapRegionClosure { |
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7046182: G1: remove unnecessary iterations over the collection set
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3774
diff
changeset
|
3641 private: |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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3774
diff
changeset
|
3642 const char* _msg; |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
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3774
diff
changeset
|
3643 size_t _occupied_sum; |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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3774
diff
changeset
|
3644 |
e8b0b0392037
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3774
diff
changeset
|
3645 public: |
e8b0b0392037
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3774
diff
changeset
|
3646 bool doHeapRegion(HeapRegion* r) { |
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7046182: G1: remove unnecessary iterations over the collection set
tonyp
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3774
diff
changeset
|
3647 HeapRegionRemSet* hrrs = r->rem_set(); |
e8b0b0392037
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tonyp
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3774
diff
changeset
|
3648 size_t occupied = hrrs->occupied(); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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3774
diff
changeset
|
3649 _occupied_sum += occupied; |
e8b0b0392037
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diff
changeset
|
3650 |
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parents:
3774
diff
changeset
|
3651 gclog_or_tty->print_cr("Printing RSet for region "HR_FORMAT, |
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7046182: G1: remove unnecessary iterations over the collection set
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parents:
3774
diff
changeset
|
3652 HR_FORMAT_PARAMS(r)); |
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7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3653 if (occupied == 0) { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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parents:
3774
diff
changeset
|
3654 gclog_or_tty->print_cr(" RSet is empty"); |
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7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3655 } else { |
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7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3656 hrrs->print(); |
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7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3657 } |
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7046182: G1: remove unnecessary iterations over the collection set
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parents:
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diff
changeset
|
3658 gclog_or_tty->print_cr("----------"); |
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7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
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diff
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|
3659 return false; |
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tonyp
parents:
3774
diff
changeset
|
3660 } |
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7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
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diff
changeset
|
3661 |
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7046182: G1: remove unnecessary iterations over the collection set
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parents:
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diff
changeset
|
3662 PrintRSetsClosure(const char* msg) : _msg(msg), _occupied_sum(0) { |
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7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3663 gclog_or_tty->cr(); |
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parents:
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diff
changeset
|
3664 gclog_or_tty->print_cr("========================================"); |
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17935
diff
changeset
|
3665 gclog_or_tty->print_cr("%s", msg); |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3666 gclog_or_tty->cr(); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
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diff
changeset
|
3667 } |
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7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3668 |
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7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3669 ~PrintRSetsClosure() { |
e8b0b0392037
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parents:
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diff
changeset
|
3670 gclog_or_tty->print_cr("Occupied Sum: "SIZE_FORMAT, _occupied_sum); |
e8b0b0392037
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tonyp
parents:
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diff
changeset
|
3671 gclog_or_tty->print_cr("========================================"); |
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7046182: G1: remove unnecessary iterations over the collection set
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parents:
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diff
changeset
|
3672 gclog_or_tty->cr(); |
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tonyp
parents:
3774
diff
changeset
|
3673 } |
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7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3674 }; |
e8b0b0392037
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tonyp
parents:
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diff
changeset
|
3675 |
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parents:
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|
3676 void G1CollectedHeap::print_cset_rsets() { |
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parents:
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|
3677 PrintRSetsClosure cl("Printing CSet RSets"); |
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parents:
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diff
changeset
|
3678 collection_set_iterate(&cl); |
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7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3679 } |
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7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
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diff
changeset
|
3680 |
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parents:
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diff
changeset
|
3681 void G1CollectedHeap::print_all_rsets() { |
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|
3682 PrintRSetsClosure cl("Printing All RSets");; |
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parents:
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diff
changeset
|
3683 heap_region_iterate(&cl); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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parents:
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diff
changeset
|
3684 } |
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changeset
|
3685 #endif // PRODUCT |
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|
3686 |
342 | 3687 G1CollectedHeap* G1CollectedHeap::heap() { |
3688 assert(_sh->kind() == CollectedHeap::G1CollectedHeap, | |
3689 "not a garbage-first heap"); | |
3690 return _g1h; | |
3691 } | |
3692 | |
3693 void G1CollectedHeap::gc_prologue(bool full /* Ignored */) { | |
1245
6484c4ee11cb
6904516: More object array barrier fixes, following up on 6906727
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diff
changeset
|
3694 // always_do_update_barrier = false; |
342 | 3695 assert(InlineCacheBuffer::is_empty(), "should have cleaned up ICBuffer"); |
3696 // Fill TLAB's and such | |
17727 | 3697 accumulate_statistics_all_tlabs(); |
342 | 3698 ensure_parsability(true); |
12339
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
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diff
changeset
|
3699 |
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3700 if (G1SummarizeRSetStats && (G1SummarizeRSetStatsPeriod > 0) && |
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
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diff
changeset
|
3701 (total_collections() % G1SummarizeRSetStatsPeriod == 0)) { |
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
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parents:
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diff
changeset
|
3702 g1_rem_set()->print_periodic_summary_info("Before GC RS summary"); |
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
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diff
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|
3703 } |
342 | 3704 } |
3705 | |
3706 void G1CollectedHeap::gc_epilogue(bool full /* Ignored */) { | |
10372
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8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
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10327
diff
changeset
|
3707 |
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8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
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10327
diff
changeset
|
3708 if (G1SummarizeRSetStats && |
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8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
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diff
changeset
|
3709 (G1SummarizeRSetStatsPeriod > 0) && |
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3710 // we are at the end of the GC. Total collections has already been increased. |
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3711 ((total_collections() - 1) % G1SummarizeRSetStatsPeriod == 0)) { |
12339
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
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diff
changeset
|
3712 g1_rem_set()->print_periodic_summary_info("After GC RS summary"); |
10372
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3713 } |
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8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
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diff
changeset
|
3714 |
342 | 3715 // FIXME: what is this about? |
3716 // I'm ignoring the "fill_newgen()" call if "alloc_event_enabled" | |
3717 // is set. | |
3718 COMPILER2_PRESENT(assert(DerivedPointerTable::is_empty(), | |
3719 "derived pointer present")); | |
1245
6484c4ee11cb
6904516: More object array barrier fixes, following up on 6906727
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parents:
1166
diff
changeset
|
3720 // always_do_update_barrier = true; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3721 |
17727 | 3722 resize_all_tlabs(); |
3723 | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3724 // We have just completed a GC. Update the soft reference |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3725 // policy with the new heap occupancy |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3726 Universe::update_heap_info_at_gc(); |
342 | 3727 } |
3728 | |
1973 | 3729 HeapWord* G1CollectedHeap::do_collection_pause(size_t word_size, |
3730 unsigned int gc_count_before, | |
12113
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
12082
diff
changeset
|
3731 bool* succeeded, |
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
12082
diff
changeset
|
3732 GCCause::Cause gc_cause) { |
1973 | 3733 assert_heap_not_locked_and_not_at_safepoint(); |
342 | 3734 g1_policy()->record_stop_world_start(); |
1973 | 3735 VM_G1IncCollectionPause op(gc_count_before, |
3736 word_size, | |
3737 false, /* should_initiate_conc_mark */ | |
3738 g1_policy()->max_pause_time_ms(), | |
12113
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
12082
diff
changeset
|
3739 gc_cause); |
1973 | 3740 VMThread::execute(&op); |
3741 | |
3742 HeapWord* result = op.result(); | |
3743 bool ret_succeeded = op.prologue_succeeded() && op.pause_succeeded(); | |
3744 assert(result == NULL || ret_succeeded, | |
3745 "the result should be NULL if the VM did not succeed"); | |
3746 *succeeded = ret_succeeded; | |
3747 | |
3748 assert_heap_not_locked(); | |
3749 return result; | |
342 | 3750 } |
3751 | |
3752 void | |
3753 G1CollectedHeap::doConcurrentMark() { | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3754 MutexLockerEx x(CGC_lock, Mutex::_no_safepoint_check_flag); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3755 if (!_cmThread->in_progress()) { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3756 _cmThread->set_started(); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3757 CGC_lock->notify(); |
342 | 3758 } |
3759 } | |
3760 | |
3761 size_t G1CollectedHeap::pending_card_num() { | |
3762 size_t extra_cards = 0; | |
3763 JavaThread *curr = Threads::first(); | |
3764 while (curr != NULL) { | |
3765 DirtyCardQueue& dcq = curr->dirty_card_queue(); | |
3766 extra_cards += dcq.size(); | |
3767 curr = curr->next(); | |
3768 } | |
3769 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
3770 size_t buffer_size = dcqs.buffer_size(); | |
3771 size_t buffer_num = dcqs.completed_buffers_num(); | |
6611 | 3772 |
3773 // PtrQueueSet::buffer_size() and PtrQueue:size() return sizes | |
3774 // in bytes - not the number of 'entries'. We need to convert | |
3775 // into a number of cards. | |
3776 return (buffer_size * buffer_num + extra_cards) / oopSize; | |
342 | 3777 } |
3778 | |
3779 size_t G1CollectedHeap::cards_scanned() { | |
1861 | 3780 return g1_rem_set()->cardsScanned(); |
342 | 3781 } |
3782 | |
3783 void | |
3784 G1CollectedHeap::setup_surviving_young_words() { | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3785 assert(_surviving_young_words == NULL, "pre-condition"); |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3786 uint array_length = g1_policy()->young_cset_region_length(); |
6197 | 3787 _surviving_young_words = NEW_C_HEAP_ARRAY(size_t, (size_t) array_length, mtGC); |
342 | 3788 if (_surviving_young_words == NULL) { |
10161
746b070f5022
8011661: Insufficient memory message says "malloc" when sometimes it should say "mmap"
ccheung
parents:
10099
diff
changeset
|
3789 vm_exit_out_of_memory(sizeof(size_t) * array_length, OOM_MALLOC_ERROR, |
342 | 3790 "Not enough space for young surv words summary."); |
3791 } | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3792 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
|
3793 #ifdef ASSERT |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3794 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
|
3795 assert( _surviving_young_words[i] == 0, "memset above" ); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3796 } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3797 #endif // !ASSERT |
342 | 3798 } |
3799 | |
3800 void | |
3801 G1CollectedHeap::update_surviving_young_words(size_t* surv_young_words) { | |
3802 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
|
3803 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
|
3804 for (uint i = 0; i < array_length; ++i) { |
342 | 3805 _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
|
3806 } |
342 | 3807 } |
3808 | |
3809 void | |
3810 G1CollectedHeap::cleanup_surviving_young_words() { | |
3811 guarantee( _surviving_young_words != NULL, "pre-condition" ); | |
6197 | 3812 FREE_C_HEAP_ARRAY(size_t, _surviving_young_words, mtGC); |
342 | 3813 _surviving_young_words = NULL; |
3814 } | |
3815 | |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3816 #ifdef ASSERT |
e8b0b0392037
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parents:
3774
diff
changeset
|
3817 class VerifyCSetClosure: public HeapRegionClosure { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3818 public: |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3819 bool doHeapRegion(HeapRegion* hr) { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3820 // 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
|
3821 // 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
|
3822 // 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
|
3823 // 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
|
3824 // 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
|
3825 // 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
|
3826 // 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
|
3827 // 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
|
3828 // evacuation failure handling. |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3829 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
|
3830 |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3831 // 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
|
3832 // perform on CSet regions. |
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3833 return false; |
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3834 } |
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3835 }; |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3836 #endif // ASSERT |
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3837 |
1709 | 3838 #if TASKQUEUE_STATS |
3839 void G1CollectedHeap::print_taskqueue_stats_hdr(outputStream* const st) { | |
3840 st->print_raw_cr("GC Task Stats"); | |
3841 st->print_raw("thr "); TaskQueueStats::print_header(1, st); st->cr(); | |
3842 st->print_raw("--- "); TaskQueueStats::print_header(2, st); st->cr(); | |
3843 } | |
3844 | |
3845 void G1CollectedHeap::print_taskqueue_stats(outputStream* const st) const { | |
3846 print_taskqueue_stats_hdr(st); | |
3847 | |
3848 TaskQueueStats totals; | |
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3849 const int n = workers() != NULL ? workers()->total_workers() : 1; |
1709 | 3850 for (int i = 0; i < n; ++i) { |
3851 st->print("%3d ", i); task_queue(i)->stats.print(st); st->cr(); | |
3852 totals += task_queue(i)->stats; | |
3853 } | |
3854 st->print_raw("tot "); totals.print(st); st->cr(); | |
3855 | |
3856 DEBUG_ONLY(totals.verify()); | |
3857 } | |
3858 | |
3859 void G1CollectedHeap::reset_taskqueue_stats() { | |
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3860 const int n = workers() != NULL ? workers()->total_workers() : 1; |
1709 | 3861 for (int i = 0; i < n; ++i) { |
3862 task_queue(i)->stats.reset(); | |
3863 } | |
3864 } | |
3865 #endif // TASKQUEUE_STATS | |
3866 | |
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3867 void G1CollectedHeap::log_gc_header() { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3868 if (!G1Log::fine()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3869 return; |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3870 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3871 |
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
3872 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
|
3873 |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3874 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
|
3875 .append(g1_policy()->gcs_are_young() ? "(young)" : "(mixed)") |
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3876 .append(g1_policy()->during_initial_mark_pause() ? " (initial-mark)" : ""); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3877 |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3878 gclog_or_tty->print("[%s", (const char*)gc_cause_str); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3879 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3880 |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3881 void G1CollectedHeap::log_gc_footer(double pause_time_sec) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3882 if (!G1Log::fine()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3883 return; |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3884 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3885 |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3886 if (G1Log::finer()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3887 if (evacuation_failed()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3888 gclog_or_tty->print(" (to-space exhausted)"); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3889 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3890 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
|
3891 g1_policy()->phase_times()->note_gc_end(); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3892 g1_policy()->phase_times()->print(pause_time_sec); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3893 g1_policy()->print_detailed_heap_transition(); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3894 } else { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3895 if (evacuation_failed()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3896 gclog_or_tty->print("--"); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3897 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3898 g1_policy()->print_heap_transition(); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3899 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
|
3900 } |
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
3901 gclog_or_tty->flush(); |
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3902 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3903 |
1973 | 3904 bool |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3905 G1CollectedHeap::do_collection_pause_at_safepoint(double target_pause_time_ms) { |
2152 | 3906 assert_at_safepoint(true /* should_be_vm_thread */); |
3907 guarantee(!is_gc_active(), "collection is not reentrant"); | |
3908 | |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3909 if (GC_locker::check_active_before_gc()) { |
1973 | 3910 return false; |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3911 } |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3912 |
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
3913 _gc_timer_stw->register_gc_start(); |
10405 | 3914 |
3915 _gc_tracer_stw->report_gc_start(gc_cause(), _gc_timer_stw->gc_start()); | |
3916 | |
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2039
diff
changeset
|
3917 SvcGCMarker sgcm(SvcGCMarker::MINOR); |
2039
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3918 ResourceMark rm; |
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3919 |
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4787
diff
changeset
|
3920 print_heap_before_gc(); |
10405 | 3921 trace_heap_before_gc(_gc_tracer_stw); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3922 |
2152 | 3923 verify_region_sets_optional(); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3924 verify_dirty_young_regions(); |
2152 | 3925 |
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3926 // 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
|
3927 // 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
|
3928 // for the duration of this pause. |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3929 g1_policy()->decide_on_conc_mark_initiation(); |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3930 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3931 // 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
|
3932 assert(!g1_policy()->during_initial_mark_pause() || |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3933 g1_policy()->gcs_are_young(), "sanity"); |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3934 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3935 // 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
|
3936 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
|
3937 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3938 // 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
|
3939 // 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
|
3940 // 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
|
3941 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
|
3942 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3943 // 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
|
3944 { |
10405 | 3945 EvacuationInfo evacuation_info; |
3946 | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3947 if (g1_policy()->during_initial_mark_pause()) { |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3948 // 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
|
3949 // full collection counter. |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
3950 increment_old_marking_cycles_started(); |
10405 | 3951 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
|
3952 } |
10405 | 3953 |
3954 _gc_tracer_stw->report_yc_type(yc_type()); | |
3955 | |
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
3956 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
6030 | 3957 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3958 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
|
3959 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
|
3960 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
|
3961 g1_policy()->phase_times()->note_gc_start(active_workers); |
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3962 log_gc_header(); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3963 |
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
3964 TraceCollectorStats tcs(g1mm()->incremental_collection_counters()); |
3356
78542e2b5e35
7036199: Adding a notification to the implementation of GarbageCollectorMXBeans
fparain
parents:
3323
diff
changeset
|
3965 TraceMemoryManagerStats tms(false /* fullGC */, gc_cause()); |
1089
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
tonyp
parents:
1088
diff
changeset
|
3966 |
2361 | 3967 // If the secondary_free_list is not empty, append it to the |
3968 // free_list. No need to wait for the cleanup operation to finish; | |
3969 // the region allocation code will check the secondary_free_list | |
3970 // and wait if necessary. If the G1StressConcRegionFreeing flag is | |
3971 // set, skip this step so that the region allocation code has to | |
3972 // get entries from the secondary_free_list. | |
2152 | 3973 if (!G1StressConcRegionFreeing) { |
2361 | 3974 append_secondary_free_list_if_not_empty_with_lock(); |
2152 | 3975 } |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3976 |
12080 | 3977 assert(check_young_list_well_formed(), "young list should be well formed"); |
3978 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
3979 "sanity check"); | |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3980 |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3981 // 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
|
3982 // 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
|
3983 // it will be set. |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3984 |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3985 { // 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
|
3986 IsGCActiveMark x; |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3987 |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3988 gc_prologue(false); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3989 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
|
3990 increment_gc_time_stamp(); |
342 | 3991 |
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
|
3992 verify_before_gc(); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3993 |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3994 COMPILER2_PRESENT(DerivedPointerTable::clear()); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3995 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3996 // Please see comment in g1CollectedHeap.hpp and |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3997 // G1CollectedHeap::ref_processing_init() to see how |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3998 // reference processing currently works in G1. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3999 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4000 // Enable discovery in the STW reference processor |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4001 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4002 true /*verify_no_refs*/); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4003 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4004 { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4005 // We want to temporarily turn off discovery by the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4006 // CM ref processor, if necessary, and turn it back on |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4007 // on again later if we do. Using a scoped |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4008 // NoRefDiscovery object will do this. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4009 NoRefDiscovery no_cm_discovery(ref_processor_cm()); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4010 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4011 // 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
|
4012 // of the collection set!). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4013 release_mutator_alloc_region(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4014 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4015 // We should call this after we retire the mutator alloc |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4016 // region(s) so that all the ALLOC / RETIRE events are generated |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4017 // before the start GC event. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4018 _hr_printer.start_gc(false /* full */, (size_t) total_collections()); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4019 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4020 // 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
|
4021 // 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
|
4022 // 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
|
4023 // |
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4024 // 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
|
4025 // |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4026 // The elapsed time induced by the start time below deliberately elides |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4027 // 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
|
4028 double sample_start_time_sec = os::elapsedTime(); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4029 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4030 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4031 gclog_or_tty->print_cr("\nBefore recording pause start.\nYoung_list:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4032 _young_list->print(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4033 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
|
4034 #endif // YOUNG_LIST_VERBOSE |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4035 |
10098
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
4036 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
|
4037 |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4038 double scan_wait_start = os::elapsedTime(); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4039 // 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
|
4040 // 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
|
4041 // 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
|
4042 // moving them during the GC. |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4043 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
|
4044 double wait_time_ms = 0.0; |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4045 if (waited) { |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4046 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
|
4047 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
|
4048 } |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4049 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
|
4050 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4051 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4052 gclog_or_tty->print_cr("\nAfter recording pause start.\nYoung_list:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4053 _young_list->print(); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4054 #endif // YOUNG_LIST_VERBOSE |
342 | 4055 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4056 if (g1_policy()->during_initial_mark_pause()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4057 concurrent_mark()->checkpointRootsInitialPre(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4058 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4059 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4060 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4061 gclog_or_tty->print_cr("\nBefore choosing collection set.\nYoung_list:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4062 _young_list->print(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4063 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
|
4064 #endif // YOUNG_LIST_VERBOSE |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4065 |
10405 | 4066 g1_policy()->finalize_cset(target_pause_time_ms, evacuation_info); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4067 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4068 _cm->note_start_of_gc(); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4069 // 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
|
4070 // 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
|
4071 // 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
|
4072 // ensure that the CSet has been finalized. |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4073 _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
|
4074 true /* verify_enqueued_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4075 false /* verify_thread_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4076 true /* verify_fingers */); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4077 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4078 if (_hr_printer.is_active()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4079 HeapRegion* hr = g1_policy()->collection_set(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4080 while (hr != NULL) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4081 G1HRPrinter::RegionType type; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4082 if (!hr->is_young()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4083 type = G1HRPrinter::Old; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4084 } else if (hr->is_survivor()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4085 type = G1HRPrinter::Survivor; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4086 } else { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4087 type = G1HRPrinter::Eden; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4088 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4089 _hr_printer.cset(hr); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4090 hr = hr->next_in_collection_set(); |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4091 } |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4092 } |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4093 |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
4094 #ifdef ASSERT |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4095 VerifyCSetClosure cl; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4096 collection_set_iterate(&cl); |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
4097 #endif // ASSERT |
1707 | 4098 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4099 setup_surviving_young_words(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4100 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4101 // Initialize the GC alloc regions. |
10405 | 4102 init_gc_alloc_regions(evacuation_info); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4103 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4104 // Actually do the work... |
10405 | 4105 evacuate_collection_set(evacuation_info); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4106 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4107 // 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
|
4108 // (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
|
4109 // 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
|
4110 // 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
|
4111 // we checked. |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4112 _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
|
4113 false /* verify_enqueued_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4114 true /* verify_thread_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4115 true /* verify_fingers */); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4116 |
10405 | 4117 free_collection_set(g1_policy()->collection_set(), evacuation_info); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4118 g1_policy()->clear_collection_set(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4119 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4120 cleanup_surviving_young_words(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4121 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4122 // Start a new incremental collection set for the next pause. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4123 g1_policy()->start_incremental_cset_building(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4124 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4125 clear_cset_fast_test(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4126 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4127 _young_list->reset_sampled_info(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4128 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4129 // Don't check the whole heap at this point as the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4130 // GC alloc regions from this pause have been tagged |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4131 // as survivors and moved on to the survivor list. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4132 // Survivor regions will fail the !is_young() check. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4133 assert(check_young_list_empty(false /* check_heap */), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4134 "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
|
4135 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4136 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4137 gclog_or_tty->print_cr("Before recording survivors.\nYoung List:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4138 _young_list->print(); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4139 #endif // YOUNG_LIST_VERBOSE |
342 | 4140 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4141 g1_policy()->record_survivor_regions(_young_list->survivor_length(), |
10405 | 4142 _young_list->first_survivor_region(), |
4143 _young_list->last_survivor_region()); | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4144 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4145 _young_list->reset_auxilary_lists(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4146 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4147 if (evacuation_failed()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4148 _summary_bytes_used = recalculate_used(); |
10405 | 4149 uint n_queues = MAX2((int)ParallelGCThreads, 1); |
4150 for (uint i = 0; i < n_queues; i++) { | |
4151 if (_evacuation_failed_info_array[i].has_failed()) { | |
4152 _gc_tracer_stw->report_evacuation_failed(_evacuation_failed_info_array[i]); | |
4153 } | |
4154 } | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4155 } else { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4156 // The "used" of the the collection set have already been subtracted |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4157 // when they were freed. Add in the bytes evacuated. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4158 _summary_bytes_used += g1_policy()->bytes_copied_during_gc(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4159 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4160 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4161 if (g1_policy()->during_initial_mark_pause()) { |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4162 // 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
|
4163 // 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
|
4164 // appropriate initialization is done on the CM object. |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4165 concurrent_mark()->checkpointRootsInitialPost(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4166 set_marking_started(); |
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4167 // 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
|
4168 // 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
|
4169 // the current thread has completed its logging output. |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4170 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4171 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4172 allocate_dummy_regions(); |
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
4173 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4174 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4175 gclog_or_tty->print_cr("\nEnd of the pause.\nYoung_list:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4176 _young_list->print(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4177 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
|
4178 #endif // YOUNG_LIST_VERBOSE |
342 | 4179 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4180 init_mutator_alloc_region(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4181 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4182 { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4183 size_t expand_bytes = g1_policy()->expansion_amount(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4184 if (expand_bytes > 0) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4185 size_t bytes_before = capacity(); |
4785 | 4186 // No need for an ergo verbose message here, |
4187 // expansion_amount() does this when it returns a value > 0. | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4188 if (!expand(expand_bytes)) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4189 // We failed to expand the heap so let's verify that |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4190 // committed/uncommitted amount match the backing store |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4191 assert(capacity() == _g1_storage.committed_size(), "committed size mismatch"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4192 assert(max_capacity() == _g1_storage.reserved_size(), "reserved size mismatch"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4193 } |
3920
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4194 } |
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4195 } |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4196 |
10405 | 4197 // 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
|
4198 // 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
|
4199 _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
|
4200 true /* verify_enqueued_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4201 true /* verify_thread_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4202 true /* verify_fingers */); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4203 _cm->note_end_of_gc(); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4204 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4205 // 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
|
4206 // 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
|
4207 // 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
|
4208 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
|
4209 double pause_time_ms = (sample_end_time_sec - sample_start_time_sec) * MILLIUNITS; |
10405 | 4210 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
|
4211 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4212 MemoryService::track_memory_usage(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4213 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4214 // 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
|
4215 // update buffers to bring the RSets up-to-date if |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4216 // G1HRRSFlushLogBuffersOnVerify has been set. While scanning |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4217 // 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
|
4218 // regions we just allocated to (i.e., the GC alloc |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4219 // regions). However, during the last GC we called |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4220 // set_saved_mark() on all the GC alloc regions, so card |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4221 // scanning might skip the [saved_mark_word()...top()] area of |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4222 // those regions (i.e., the area we allocated objects into |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4223 // during the last GC). But it shouldn't. Given that |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4224 // saved_mark_word() is conditional on whether the GC time stamp |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4225 // 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
|
4226 // 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
|
4227 // regions and saved_mark_word() will simply return top() for |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4228 // 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
|
4229 // than iterating over the regions and fixing them. In fact, the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4230 // GC time stamp increment here also ensures that |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4231 // saved_mark_word() will return top() between pauses, i.e., |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4232 // during concurrent refinement. So we don't need the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4233 // is_gc_active() check to decided which top to use when |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4234 // scanning cards (see CR 7039627). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4235 increment_gc_time_stamp(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4236 |
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
|
4237 verify_after_gc(); |
3979
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 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4240 ref_processor_stw()->verify_no_references_recorded(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4241 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4242 // 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
|
4243 } |
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4244 |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4245 // 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
|
4246 // 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
|
4247 // 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
|
4248 // RETIRE events are generated before the end GC event. |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4249 _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
|
4250 |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4251 if (mark_in_progress()) { |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4252 concurrent_mark()->update_g1_committed(); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4253 } |
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4254 |
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4255 #ifdef TRACESPINNING |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4256 ParallelTaskTerminator::print_termination_counts(); |
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4257 #endif |
342 | 4258 |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4259 gc_epilogue(false); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4260 } |
6121
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4261 |
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
4262 // 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
|
4263 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
|
4264 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4265 // 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
|
4266 // 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
|
4267 // 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
|
4268 // logging output either. |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4269 |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4270 _hrs.verify_optional(); |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4271 verify_region_sets_optional(); |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4272 |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4273 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
|
4274 TASKQUEUE_STATS_ONLY(reset_taskqueue_stats()); |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4275 |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4276 print_heap_after_gc(); |
10405 | 4277 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
|
4278 |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4279 // 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
|
4280 // 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
|
4281 // 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
|
4282 // before any GC notifications are raised. |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4283 g1mm()->update_sizes(); |
10405 | 4284 |
4285 _gc_tracer_stw->report_evacuation_info(&evacuation_info); | |
4286 _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
|
4287 _gc_timer_stw->register_gc_end(); |
10405 | 4288 _gc_tracer_stw->report_gc_end(_gc_timer_stw->gc_end(), _gc_timer_stw->time_partitions()); |
4289 } | |
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4290 // 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
|
4291 // 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
|
4292 // that came from the pause. |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4293 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4294 if (should_start_conc_mark) { |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4295 // CAUTION: after the doConcurrentMark() call below, |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4296 // the concurrent marking thread(s) could be running |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4297 // concurrently with us. Make sure that anything after |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4298 // 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
|
4299 // 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
|
4300 // not start until the safepoint itself is released in |
20192 | 4301 // SuspendibleThreadSet::desynchronize(). |
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4302 doConcurrentMark(); |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4303 } |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4304 |
1973 | 4305 return true; |
342 | 4306 } |
4307 | |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4308 size_t G1CollectedHeap::desired_plab_sz(GCAllocPurpose purpose) |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4309 { |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4310 size_t gclab_word_size; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4311 switch (purpose) { |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4312 case GCAllocForSurvived: |
6595 | 4313 gclab_word_size = _survivor_plab_stats.desired_plab_sz(); |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4314 break; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4315 case GCAllocForTenured: |
6595 | 4316 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4317 break; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4318 default: |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4319 assert(false, "unknown GCAllocPurpose"); |
6595 | 4320 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4321 break; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4322 } |
6595 | 4323 |
4324 // Prevent humongous PLAB sizes for two reasons: | |
4325 // * PLABs are allocated using a similar paths as oops, but should | |
4326 // never be in a humongous region | |
4327 // * Allowing humongous PLABs needlessly churns the region free lists | |
4328 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
|
4329 } |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4330 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4331 void G1CollectedHeap::init_mutator_alloc_region() { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4332 assert(_mutator_alloc_region.get() == NULL, "pre-condition"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4333 _mutator_alloc_region.init(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4334 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4335 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4336 void G1CollectedHeap::release_mutator_alloc_region() { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4337 _mutator_alloc_region.release(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4338 assert(_mutator_alloc_region.get() == NULL, "post-condition"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4339 } |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4340 |
10405 | 4341 void G1CollectedHeap::init_gc_alloc_regions(EvacuationInfo& evacuation_info) { |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4342 assert_at_safepoint(true /* should_be_vm_thread */); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4343 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4344 _survivor_gc_alloc_region.init(); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4345 _old_gc_alloc_region.init(); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4346 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
|
4347 _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
|
4348 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4349 // 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
|
4350 // 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
|
4351 // 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
|
4352 // 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
|
4353 // 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
|
4354 // 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
|
4355 // during a cleanup and was added to the free list, but |
10405 | 4356 // 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
|
4357 // 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
|
4358 if (retained_region != NULL && |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4359 !retained_region->in_collection_set() && |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4360 !(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
|
4361 !retained_region->is_empty() && |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4362 !retained_region->isHumongous()) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4363 retained_region->set_saved_mark(); |
4072 | 4364 // The retained region was added to the old region set when it was |
4365 // retired. We have to remove it now, since we don't allow regions | |
4366 // we allocate to in the region sets. We'll re-add it later, when | |
4367 // it's retired again. | |
4368 _old_set.remove(retained_region); | |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4369 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
|
4370 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
|
4371 _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
|
4372 _hr_printer.reuse(retained_region); |
10405 | 4373 evacuation_info.set_alloc_regions_used_before(retained_region->used()); |
4374 } | |
4375 } | |
4376 | |
4377 void G1CollectedHeap::release_gc_alloc_regions(uint no_of_gc_workers, EvacuationInfo& evacuation_info) { | |
4378 evacuation_info.set_allocation_regions(_survivor_gc_alloc_region.count() + | |
4379 _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
|
4380 _survivor_gc_alloc_region.release(); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4381 // 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
|
4382 // _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
|
4383 // _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
|
4384 // 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
|
4385 // condition. |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4386 _retained_old_gc_alloc_region = _old_gc_alloc_region.release(); |
6595 | 4387 |
4388 if (ResizePLAB) { | |
6819 | 4389 _survivor_plab_stats.adjust_desired_plab_sz(no_of_gc_workers); |
4390 _old_plab_stats.adjust_desired_plab_sz(no_of_gc_workers); | |
6595 | 4391 } |
342 | 4392 } |
4393 | |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4394 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
|
4395 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
|
4396 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
|
4397 _retained_old_gc_alloc_region = NULL; |
342 | 4398 } |
4399 | |
4400 void G1CollectedHeap::init_for_evac_failure(OopsInHeapRegionClosure* cl) { | |
4401 _drain_in_progress = false; | |
4402 set_evac_failure_closure(cl); | |
6197 | 4403 _evac_failure_scan_stack = new (ResourceObj::C_HEAP, mtGC) GrowableArray<oop>(40, true); |
342 | 4404 } |
4405 | |
4406 void G1CollectedHeap::finalize_for_evac_failure() { | |
4407 assert(_evac_failure_scan_stack != NULL && | |
4408 _evac_failure_scan_stack->length() == 0, | |
4409 "Postcondition"); | |
4410 assert(!_drain_in_progress, "Postcondition"); | |
1045 | 4411 delete _evac_failure_scan_stack; |
342 | 4412 _evac_failure_scan_stack = NULL; |
4413 } | |
4414 | |
4415 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
|
4416 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
|
4417 |
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4418 double remove_self_forwards_start = os::elapsedTime(); |
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4419 |
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4420 G1ParRemoveSelfForwardPtrsTask rsfp_task(this); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4421 |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4422 if (G1CollectedHeap::use_parallel_gc_threads()) { |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4423 set_par_threads(); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4424 workers()->run_task(&rsfp_task); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4425 set_par_threads(0); |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
4426 } else { |
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4427 rsfp_task.work(0); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4428 } |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4429 |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4430 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
|
4431 |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4432 // 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
|
4433 reset_cset_heap_region_claim_values(); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4434 |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4435 assert(check_cset_heap_region_claim_values(HeapRegion::InitialClaimValue), "sanity"); |
342 | 4436 |
4437 // 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
|
4438 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
|
4439 _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
|
4440 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
|
4441 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
|
4442 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
|
4443 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
|
4444 } |
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4445 _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
|
4446 _preserved_marks_of_objs.clear(true); |
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4447 |
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4448 g1_policy()->phase_times()->record_evac_fail_remove_self_forwards((os::elapsedTime() - remove_self_forwards_start) * 1000.0); |
342 | 4449 } |
4450 | |
4451 void G1CollectedHeap::push_on_evac_failure_scan_stack(oop obj) { | |
4452 _evac_failure_scan_stack->push(obj); | |
4453 } | |
4454 | |
4455 void G1CollectedHeap::drain_evac_failure_scan_stack() { | |
4456 assert(_evac_failure_scan_stack != NULL, "precondition"); | |
4457 | |
4458 while (_evac_failure_scan_stack->length() > 0) { | |
4459 oop obj = _evac_failure_scan_stack->pop(); | |
4460 _evac_failure_closure->set_region(heap_region_containing(obj)); | |
4461 obj->oop_iterate_backwards(_evac_failure_closure); | |
4462 } | |
4463 } | |
4464 | |
4465 oop | |
10405 | 4466 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
|
4467 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
|
4468 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
|
4469 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
|
4470 (HeapWord*) old)); |
342 | 4471 markOop m = old->mark(); |
4472 oop forward_ptr = old->forward_to_atomic(old); | |
4473 if (forward_ptr == NULL) { | |
4474 // Forward-to-self succeeded. | |
10405 | 4475 assert(_par_scan_state != NULL, "par scan state"); |
4476 OopsInHeapRegionClosure* cl = _par_scan_state->evac_failure_closure(); | |
4477 uint queue_num = _par_scan_state->queue_num(); | |
4478 | |
4479 _evacuation_failed = true; | |
4480 _evacuation_failed_info_array[queue_num].register_copy_failure(old->size()); | |
342 | 4481 if (_evac_failure_closure != cl) { |
4482 MutexLockerEx x(EvacFailureStack_lock, Mutex::_no_safepoint_check_flag); | |
4483 assert(!_drain_in_progress, | |
4484 "Should only be true while someone holds the lock."); | |
4485 // Set the global evac-failure closure to the current thread's. | |
4486 assert(_evac_failure_closure == NULL, "Or locking has failed."); | |
4487 set_evac_failure_closure(cl); | |
4488 // Now do the common part. | |
4489 handle_evacuation_failure_common(old, m); | |
4490 // Reset to NULL. | |
4491 set_evac_failure_closure(NULL); | |
4492 } else { | |
4493 // The lock is already held, and this is recursive. | |
4494 assert(_drain_in_progress, "This should only be the recursive case."); | |
4495 handle_evacuation_failure_common(old, m); | |
4496 } | |
4497 return old; | |
4498 } 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
|
4499 // 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
|
4500 // 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
|
4501 // 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
|
4502 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
|
4503 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
|
4504 "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
|
4505 (HeapWord*) old, (HeapWord*) forward_ptr)); |
342 | 4506 return forward_ptr; |
4507 } | |
4508 } | |
4509 | |
4510 void G1CollectedHeap::handle_evacuation_failure_common(oop old, markOop m) { | |
4511 preserve_mark_if_necessary(old, m); | |
4512 | |
4513 HeapRegion* r = heap_region_containing(old); | |
4514 if (!r->evacuation_failed()) { | |
4515 r->set_evacuation_failed(true); | |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4516 _hr_printer.evac_failure(r); |
342 | 4517 } |
4518 | |
4519 push_on_evac_failure_scan_stack(old); | |
4520 | |
4521 if (!_drain_in_progress) { | |
4522 // prevent recursion in copy_to_survivor_space() | |
4523 _drain_in_progress = true; | |
4524 drain_evac_failure_scan_stack(); | |
4525 _drain_in_progress = false; | |
4526 } | |
4527 } | |
4528 | |
4529 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
|
4530 assert(evacuation_failed(), "Oversaving!"); |
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4531 // 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
|
4532 // case of a promotion failure. |
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4533 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
|
4534 _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
|
4535 _preserved_marks_of_objs.push(m); |
342 | 4536 } |
4537 } | |
4538 | |
4539 HeapWord* G1CollectedHeap::par_allocate_during_gc(GCAllocPurpose purpose, | |
4540 size_t word_size) { | |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4541 if (purpose == GCAllocForSurvived) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4542 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
|
4543 if (result != NULL) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4544 return result; |
342 | 4545 } else { |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4546 // 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
|
4547 // object there. |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4548 return old_attempt_allocation(word_size); |
342 | 4549 } |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4550 } else { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4551 assert(purpose == GCAllocForTenured, "sanity"); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4552 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
|
4553 if (result != NULL) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4554 return result; |
342 | 4555 } else { |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4556 // 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
|
4557 // object there. |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4558 return survivor_attempt_allocation(word_size); |
342 | 4559 } |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4560 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4561 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4562 ShouldNotReachHere(); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4563 // 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
|
4564 return NULL; |
342 | 4565 } |
4566 | |
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4567 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
|
4568 ParGCAllocBuffer(gclab_word_size), _retired(true) { } |
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4569 |
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4570 void G1ParCopyHelper::mark_object(oop obj) { |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4571 #ifdef ASSERT |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4572 HeapRegion* hr = _g1->heap_region_containing(obj); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4573 assert(hr != NULL, "sanity"); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4574 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
|
4575 #endif // ASSERT |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4576 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4577 // 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
|
4578 _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
|
4579 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4580 |
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4581 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
|
4582 #ifdef ASSERT |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4583 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
|
4584 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
|
4585 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
|
4586 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4587 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
|
4588 assert(from_hr != NULL, "sanity"); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4589 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
|
4590 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4591 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
|
4592 assert(to_hr != NULL, "sanity"); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4593 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
|
4594 #endif // ASSERT |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4595 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4596 // 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
|
4597 // 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
|
4598 // 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
|
4599 // image which we know should not be changing. |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4600 _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
|
4601 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4602 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4603 template <class T> |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4604 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
|
4605 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
|
4606 _scanned_klass->record_modified_oops(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4607 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4608 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4609 |
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4610 template <G1Barrier barrier, bool do_mark_object> |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4611 template <class T> |
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4612 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
|
4613 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
|
4614 |
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4615 if (oopDesc::is_null(heap_oop)) { |
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4616 return; |
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4617 } |
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4618 |
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4619 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
|
4620 |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4621 assert(_worker_id == _par_scan_state->queue_num(), "sanity"); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4622 |
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
4623 if (_g1->in_cset_fast_test(obj)) { |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4624 oop forwardee; |
526 | 4625 if (obj->is_forwarded()) { |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4626 forwardee = obj->forwardee(); |
526 | 4627 } else { |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4628 forwardee = _par_scan_state->copy_to_survivor_space(obj); |
342 | 4629 } |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4630 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
|
4631 oopDesc::encode_store_heap_oop(p, forwardee); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4632 if (do_mark_object && forwardee != obj) { |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4633 // If the object is self-forwarded we don't need to explicitly |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4634 // 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
|
4635 mark_forwarded_object(obj, forwardee); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4636 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4637 |
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4638 if (barrier == G1BarrierKlass) { |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4639 do_klass_barrier(p, forwardee); |
342 | 4640 } |
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4641 } else { |
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4642 // The object is not in collection set. If we're a root scanning |
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4643 // closure during an initial mark pause (i.e. do_mark_object will |
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4644 // be true) then attempt to mark the object. |
17688
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4645 if (do_mark_object) { |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4646 mark_object(obj); |
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4647 } |
526 | 4648 } |
4649 | |
17688
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4650 if (barrier == G1BarrierEvac) { |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4651 _par_scan_state->update_rs(_from, p, _worker_id); |
526 | 4652 } |
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4653 } |
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4654 |
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4655 template void G1ParCopyClosure<G1BarrierEvac, false>::do_oop_work(oop* p); |
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4656 template void G1ParCopyClosure<G1BarrierEvac, false>::do_oop_work(narrowOop* p); |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4657 |
342 | 4658 class G1ParEvacuateFollowersClosure : public VoidClosure { |
4659 protected: | |
4660 G1CollectedHeap* _g1h; | |
4661 G1ParScanThreadState* _par_scan_state; | |
4662 RefToScanQueueSet* _queues; | |
4663 ParallelTaskTerminator* _terminator; | |
4664 | |
4665 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } | |
4666 RefToScanQueueSet* queues() { return _queues; } | |
4667 ParallelTaskTerminator* terminator() { return _terminator; } | |
4668 | |
4669 public: | |
4670 G1ParEvacuateFollowersClosure(G1CollectedHeap* g1h, | |
4671 G1ParScanThreadState* par_scan_state, | |
4672 RefToScanQueueSet* queues, | |
4673 ParallelTaskTerminator* terminator) | |
4674 : _g1h(g1h), _par_scan_state(par_scan_state), | |
4675 _queues(queues), _terminator(terminator) {} | |
4676 | |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4677 void do_void(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4678 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4679 private: |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4680 inline bool offer_termination(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4681 }; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4682 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4683 bool G1ParEvacuateFollowersClosure::offer_termination() { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4684 G1ParScanThreadState* const pss = par_scan_state(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4685 pss->start_term_time(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4686 const bool res = terminator()->offer_termination(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4687 pss->end_term_time(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4688 return res; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4689 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4690 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4691 void G1ParEvacuateFollowersClosure::do_void() { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4692 G1ParScanThreadState* const pss = par_scan_state(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4693 pss->trim_queue(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4694 do { |
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
4695 pss->steal_and_trim_queue(queues()); |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4696 } while (!offer_termination()); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4697 } |
342 | 4698 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4699 class G1KlassScanClosure : public KlassClosure { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4700 G1ParCopyHelper* _closure; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4701 bool _process_only_dirty; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4702 int _count; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4703 public: |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4704 G1KlassScanClosure(G1ParCopyHelper* closure, bool process_only_dirty) |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4705 : _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
|
4706 void do_klass(Klass* klass) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4707 // 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
|
4708 // 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
|
4709 if (!_process_only_dirty || klass->has_modified_oops()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4710 // 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
|
4711 klass->clear_modified_oops(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4712 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4713 // 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
|
4714 // 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
|
4715 _closure->set_scanned_klass(klass); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4716 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4717 klass->oops_do(_closure); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4718 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4719 _closure->set_scanned_klass(NULL); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4720 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4721 _count++; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4722 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4723 }; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4724 |
342 | 4725 class G1ParTask : public AbstractGangTask { |
4726 protected: | |
4727 G1CollectedHeap* _g1h; | |
4728 RefToScanQueueSet *_queues; | |
4729 ParallelTaskTerminator _terminator; | |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
4730 uint _n_workers; |
342 | 4731 |
4732 Mutex _stats_lock; | |
4733 Mutex* stats_lock() { return &_stats_lock; } | |
4734 | |
4735 size_t getNCards() { | |
4736 return (_g1h->capacity() + G1BlockOffsetSharedArray::N_bytes - 1) | |
4737 / G1BlockOffsetSharedArray::N_bytes; | |
4738 } | |
4739 | |
4740 public: | |
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
4741 G1ParTask(G1CollectedHeap* g1h, RefToScanQueueSet *task_queues) |
342 | 4742 : AbstractGangTask("G1 collection"), |
4743 _g1h(g1h), | |
4744 _queues(task_queues), | |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4745 _terminator(0, _queues), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4746 _stats_lock(Mutex::leaf, "parallel G1 stats lock", true) |
342 | 4747 {} |
4748 | |
4749 RefToScanQueueSet* queues() { return _queues; } | |
4750 | |
4751 RefToScanQueue *work_queue(int i) { | |
4752 return queues()->queue(i); | |
4753 } | |
4754 | |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4755 ParallelTaskTerminator* terminator() { return &_terminator; } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4756 |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4757 virtual void set_for_termination(int active_workers) { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4758 // 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
|
4759 // 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
|
4760 // for SequentialSubTasksDone. |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4761 // This task also uses SubTasksDone in SharedHeap and G1CollectedHeap |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4762 // both of which need setting by set_n_termination(). |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4763 _g1h->SharedHeap::set_n_termination(active_workers); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4764 _g1h->set_n_termination(active_workers); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4765 terminator()->reset_for_reuse(active_workers); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4766 _n_workers = active_workers; |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4767 } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4768 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
4769 void work(uint worker_id) { |
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
4770 if (worker_id >= _n_workers) return; // no work needed this round |
1611 | 4771 |
4772 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
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|
4773 _g1h->g1_policy()->phase_times()->record_gc_worker_start_time(worker_id, start_time_ms); |
1611 | 4774 |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4775 { |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4776 ResourceMark rm; |
500023bd0818
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johnc
parents:
5963
diff
changeset
|
4777 HandleMark hm; |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4778 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4779 ReferenceProcessor* rp = _g1h->ref_processor_stw(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4780 |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4781 G1ParScanThreadState pss(_g1h, worker_id, rp); |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4782 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, rp); |
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
4783 |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4784 pss.set_evac_failure_closure(&evac_failure_cl); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4785 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4786 G1ParScanExtRootClosure only_scan_root_cl(_g1h, &pss, rp); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4787 G1ParScanMetadataClosure only_scan_metadata_cl(_g1h, &pss, rp); |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4788 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4789 G1ParScanAndMarkExtRootClosure scan_mark_root_cl(_g1h, &pss, rp); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4790 G1ParScanAndMarkMetadataClosure scan_mark_metadata_cl(_g1h, &pss, rp); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4791 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4792 bool only_young = _g1h->g1_policy()->gcs_are_young(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4793 G1KlassScanClosure scan_mark_klasses_cl_s(&scan_mark_metadata_cl, false); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4794 G1KlassScanClosure only_scan_klasses_cl_s(&only_scan_metadata_cl, only_young); |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4795 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4796 OopClosure* scan_root_cl = &only_scan_root_cl; |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4797 G1KlassScanClosure* scan_klasses_cl = &only_scan_klasses_cl_s; |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4798 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4799 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
|
4800 // We also need to mark copied objects. |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4801 scan_root_cl = &scan_mark_root_cl; |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4802 scan_klasses_cl = &scan_mark_klasses_cl_s; |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4803 } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4804 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4805 G1ParPushHeapRSClosure push_heap_rs_cl(_g1h, &pss); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4806 |
12080 | 4807 // Don't scan the scavengable methods in the code cache as part |
4808 // of strong root scanning. The code roots that point into a | |
4809 // region in the collection set are scanned when we scan the | |
4810 // region's RSet. | |
4811 int so = SharedHeap::SO_AllClasses | SharedHeap::SO_Strings; | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4812 |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4813 pss.start_strong_roots(); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4814 _g1h->g1_process_strong_roots(/* is scavenging */ true, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4815 SharedHeap::ScanningOption(so), |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4816 scan_root_cl, |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4817 &push_heap_rs_cl, |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4818 scan_klasses_cl, |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4819 worker_id); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4820 pss.end_strong_roots(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4821 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4822 { |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4823 double start = os::elapsedTime(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4824 G1ParEvacuateFollowersClosure evac(_g1h, &pss, _queues, &_terminator); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4825 evac.do_void(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4826 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
|
4827 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
|
4828 _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
|
4829 _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
|
4830 } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4831 _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
|
4832 _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
|
4833 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4834 if (ParallelGCVerbose) { |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4835 MutexLocker x(stats_lock()); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4836 pss.print_termination_stats(worker_id); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4837 } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4838 |
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
4839 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
|
4840 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4841 // 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
|
4842 // 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
|
4843 // "GC Worker Time". |
342 | 4844 } |
4845 | |
1611 | 4846 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
|
4847 _g1h->g1_policy()->phase_times()->record_gc_worker_end_time(worker_id, end_time_ms); |
342 | 4848 } |
4849 }; | |
4850 | |
4851 // *** Common G1 Evacuation Stuff | |
4852 | |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
4853 // This method is run in a GC worker. |
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
4854 |
342 | 4855 void |
4856 G1CollectedHeap:: | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4857 g1_process_strong_roots(bool is_scavenging, |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
4858 ScanningOption so, |
342 | 4859 OopClosure* scan_non_heap_roots, |
4860 OopsInHeapRegionClosure* scan_rs, | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4861 G1KlassScanClosure* scan_klasses, |
17844
8847586c9037
8016302: Change type of the number of GC workers to unsigned int (2)
vkempik
parents:
17833
diff
changeset
|
4862 uint worker_i) { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4863 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4864 // First scan the strong roots |
342 | 4865 double ext_roots_start = os::elapsedTime(); |
4866 double closure_app_time_sec = 0.0; | |
4867 | |
4868 BufferingOopClosure buf_scan_non_heap_roots(scan_non_heap_roots); | |
4869 | |
12080 | 4870 assert(so & SO_CodeCache || scan_rs != NULL, "must scan code roots somehow"); |
4871 // Walk the code cache/strong code roots w/o buffering, because StarTask | |
4872 // cannot handle unaligned oop locations. | |
4873 CodeBlobToOopClosure eager_scan_code_roots(scan_non_heap_roots, true /* do_marking */); | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
4874 |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
4875 process_strong_roots(false, // no scoping; this is parallel code |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4876 is_scavenging, so, |
342 | 4877 &buf_scan_non_heap_roots, |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
4878 &eager_scan_code_roots, |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4879 scan_klasses |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4880 ); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4881 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4882 // 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
|
4883 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
|
4884 // We need to treat the discovered reference lists of the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4885 // concurrent mark ref processor as roots and keep entries |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4886 // (which are added by the marking threads) on them live |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4887 // until they can be processed at the end of marking. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4888 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
|
4889 } |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
4890 |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
4891 // Finish up any enqueued closure apps (attributed as object copy time). |
342 | 4892 buf_scan_non_heap_roots.done(); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4893 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4894 double obj_copy_time_sec = buf_scan_non_heap_roots.closure_app_seconds(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4895 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4896 g1_policy()->phase_times()->record_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
|
4897 |
342 | 4898 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
|
4899 ((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
|
4900 |
6219
922993931b3d
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4901 g1_policy()->phase_times()->record_ext_root_scan_time(worker_i, ext_root_time_ms); |
342 | 4902 |
4787
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4903 // During conc marking we have to filter the per-thread SATB buffers |
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4904 // to make sure we remove any oops into the CSet (which will show up |
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|
4905 // as implicitly live). |
6628
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4906 double satb_filtering_ms = 0.0; |
4787
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|
4907 if (!_process_strong_tasks->is_task_claimed(G1H_PS_filter_satb_buffers)) { |
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|
4908 if (mark_in_progress()) { |
6628
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4909 double satb_filter_start = os::elapsedTime(); |
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4910 |
4787
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|
4911 JavaThread::satb_mark_queue_set().filter_thread_buffers(); |
6628
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4912 |
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4913 satb_filtering_ms = (os::elapsedTime() - satb_filter_start) * 1000.0; |
4787
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|
4914 } |
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|
4915 } |
6219
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4916 g1_policy()->phase_times()->record_satb_filtering_time(worker_i, satb_filtering_ms); |
342 | 4917 |
12080 | 4918 // If this is an initial mark pause, and we're not scanning |
4919 // the entire code cache, we need to mark the oops in the | |
4920 // strong code root lists for the regions that are not in | |
4921 // the collection set. | |
4922 // Note all threads participate in this set of root tasks. | |
4923 double mark_strong_code_roots_ms = 0.0; | |
4924 if (g1_policy()->during_initial_mark_pause() && !(so & SO_CodeCache)) { | |
4925 double mark_strong_roots_start = os::elapsedTime(); | |
4926 mark_strong_code_roots(worker_i); | |
4927 mark_strong_code_roots_ms = (os::elapsedTime() - mark_strong_roots_start) * 1000.0; | |
4928 } | |
4929 g1_policy()->phase_times()->record_strong_code_root_mark_time(worker_i, mark_strong_code_roots_ms); | |
4930 | |
342 | 4931 // Now scan the complement of the collection set. |
4932 if (scan_rs != NULL) { | |
12080 | 4933 g1_rem_set()->oops_into_collection_set_do(scan_rs, &eager_scan_code_roots, worker_i); |
342 | 4934 } |
4935 _process_strong_tasks->all_tasks_completed(); | |
4936 } | |
4937 | |
4938 void | |
10179
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4939 G1CollectedHeap::g1_process_weak_roots(OopClosure* root_closure) { |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
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4940 CodeBlobToOopClosure roots_in_blobs(root_closure, /*do_marking=*/ false); |
10179
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4941 SharedHeap::process_weak_roots(root_closure, &roots_in_blobs); |
342 | 4942 } |
4943 | |
17634
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4944 class G1StringSymbolTableUnlinkTask : public AbstractGangTask { |
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4945 private: |
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4946 BoolObjectClosure* _is_alive; |
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4947 int _initial_string_table_size; |
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4948 int _initial_symbol_table_size; |
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|
4949 |
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4950 bool _process_strings; |
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4951 int _strings_processed; |
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|
4952 int _strings_removed; |
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|
4953 |
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4954 bool _process_symbols; |
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4955 int _symbols_processed; |
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4956 int _symbols_removed; |
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4957 |
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|
4958 bool _do_in_parallel; |
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4959 public: |
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4960 G1StringSymbolTableUnlinkTask(BoolObjectClosure* is_alive, bool process_strings, bool process_symbols) : |
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4961 AbstractGangTask("Par String/Symbol table unlink"), _is_alive(is_alive), |
17652
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4962 _do_in_parallel(G1CollectedHeap::use_parallel_gc_threads()), |
17634
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4963 _process_strings(process_strings), _strings_processed(0), _strings_removed(0), |
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4964 _process_symbols(process_symbols), _symbols_processed(0), _symbols_removed(0) { |
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4965 |
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4966 _initial_string_table_size = StringTable::the_table()->table_size(); |
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4967 _initial_symbol_table_size = SymbolTable::the_table()->table_size(); |
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4968 if (process_strings) { |
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|
4969 StringTable::clear_parallel_claimed_index(); |
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|
4970 } |
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|
4971 if (process_symbols) { |
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|
4972 SymbolTable::clear_parallel_claimed_index(); |
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|
4973 } |
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|
4974 } |
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|
4975 |
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|
4976 ~G1StringSymbolTableUnlinkTask() { |
17652
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|
4977 guarantee(!_process_strings || !_do_in_parallel || StringTable::parallel_claimed_index() >= _initial_string_table_size, |
17634
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|
4978 err_msg("claim value "INT32_FORMAT" after unlink less than initial string table size "INT32_FORMAT, |
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|
4979 StringTable::parallel_claimed_index(), _initial_string_table_size)); |
17652
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|
4980 guarantee(!_process_symbols || !_do_in_parallel || SymbolTable::parallel_claimed_index() >= _initial_symbol_table_size, |
17634
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|
4981 err_msg("claim value "INT32_FORMAT" after unlink less than initial symbol table size "INT32_FORMAT, |
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|
4982 SymbolTable::parallel_claimed_index(), _initial_symbol_table_size)); |
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|
4983 } |
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|
4984 |
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|
4985 void work(uint worker_id) { |
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|
4986 if (_do_in_parallel) { |
17634
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|
4987 int strings_processed = 0; |
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|
4988 int strings_removed = 0; |
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|
4989 int symbols_processed = 0; |
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|
4990 int symbols_removed = 0; |
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|
4991 if (_process_strings) { |
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|
4992 StringTable::possibly_parallel_unlink(_is_alive, &strings_processed, &strings_removed); |
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|
4993 Atomic::add(strings_processed, &_strings_processed); |
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|
4994 Atomic::add(strings_removed, &_strings_removed); |
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|
4995 } |
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|
4996 if (_process_symbols) { |
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|
4997 SymbolTable::possibly_parallel_unlink(&symbols_processed, &symbols_removed); |
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|
4998 Atomic::add(symbols_processed, &_symbols_processed); |
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|
4999 Atomic::add(symbols_removed, &_symbols_removed); |
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|
5000 } |
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|
5001 } else { |
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|
5002 if (_process_strings) { |
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|
5003 StringTable::unlink(_is_alive, &_strings_processed, &_strings_removed); |
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|
5004 } |
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|
5005 if (_process_symbols) { |
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|
5006 SymbolTable::unlink(&_symbols_processed, &_symbols_removed); |
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|
5007 } |
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|
5008 } |
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|
5009 } |
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|
5010 |
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|
5011 size_t strings_processed() const { return (size_t)_strings_processed; } |
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|
5012 size_t strings_removed() const { return (size_t)_strings_removed; } |
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|
5013 |
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|
5014 size_t symbols_processed() const { return (size_t)_symbols_processed; } |
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|
5015 size_t symbols_removed() const { return (size_t)_symbols_removed; } |
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|
5016 }; |
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|
5017 |
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|
5018 void G1CollectedHeap::unlink_string_and_symbol_table(BoolObjectClosure* is_alive, |
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|
5019 bool process_strings, bool process_symbols) { |
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|
5020 uint n_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
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|
5021 _g1h->workers()->active_workers() : 1); |
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|
5022 |
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|
5023 G1StringSymbolTableUnlinkTask g1_unlink_task(is_alive, process_strings, process_symbols); |
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|
5024 if (G1CollectedHeap::use_parallel_gc_threads()) { |
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|
5025 set_par_threads(n_workers); |
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|
5026 workers()->run_task(&g1_unlink_task); |
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|
5027 set_par_threads(0); |
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|
5028 } else { |
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|
5029 g1_unlink_task.work(0); |
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|
5030 } |
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|
5031 if (G1TraceStringSymbolTableScrubbing) { |
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|
5032 gclog_or_tty->print_cr("Cleaned string and symbol table, " |
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|
5033 "strings: "SIZE_FORMAT" processed, "SIZE_FORMAT" removed, " |
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|
5034 "symbols: "SIZE_FORMAT" processed, "SIZE_FORMAT" removed", |
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|
5035 g1_unlink_task.strings_processed(), g1_unlink_task.strings_removed(), |
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|
5036 g1_unlink_task.symbols_processed(), g1_unlink_task.symbols_removed()); |
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|
5037 } |
17764 | 5038 |
5039 if (G1StringDedup::is_enabled()) { | |
5040 G1StringDedup::unlink(is_alive); | |
5041 } | |
17634
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8027476: Improve performance of Stringtable unlink
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|
5042 } |
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|
5043 |
20216
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8019342: G1: High "Other" time most likely due to card redirtying
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|
5044 class G1RedirtyLoggedCardsTask : public AbstractGangTask { |
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|
5045 private: |
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|
5046 DirtyCardQueueSet* _queue; |
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|
5047 public: |
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|
5048 G1RedirtyLoggedCardsTask(DirtyCardQueueSet* queue) : AbstractGangTask("Redirty Cards"), _queue(queue) { } |
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|
5049 |
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|
5050 virtual void work(uint worker_id) { |
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|
5051 double start_time = os::elapsedTime(); |
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|
5052 |
20217
6b52700a896b
8040002: Clean up code and code duplication in re-diryting cards for verification
tschatzl
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diff
changeset
|
5053 RedirtyLoggedCardTableEntryClosure cl; |
20216
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|
5054 if (G1CollectedHeap::heap()->use_parallel_gc_threads()) { |
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|
5055 _queue->par_apply_closure_to_all_completed_buffers(&cl); |
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|
5056 } else { |
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changeset
|
5057 _queue->apply_closure_to_all_completed_buffers(&cl); |
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|
5058 } |
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changeset
|
5059 |
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|
5060 G1GCPhaseTimes* timer = G1CollectedHeap::heap()->g1_policy()->phase_times(); |
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|
5061 timer->record_redirty_logged_cards_time_ms(worker_id, (os::elapsedTime() - start_time) * 1000.0); |
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|
5062 timer->record_redirty_logged_cards_processed_cards(worker_id, cl.num_processed()); |
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|
5063 } |
17756
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|
5064 }; |
a07bea31ef35
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|
5065 |
a07bea31ef35
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|
5066 void G1CollectedHeap::redirty_logged_cards() { |
a07bea31ef35
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|
5067 guarantee(G1DeferredRSUpdate, "Must only be called when using deferred RS updates."); |
a07bea31ef35
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|
5068 double redirty_logged_cards_start = os::elapsedTime(); |
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|
5069 |
20216
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|
5070 uint n_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
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|
5071 _g1h->workers()->active_workers() : 1); |
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|
5072 |
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changeset
|
5073 G1RedirtyLoggedCardsTask redirty_task(&dirty_card_queue_set()); |
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|
5074 dirty_card_queue_set().reset_for_par_iteration(); |
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|
5075 if (use_parallel_gc_threads()) { |
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|
5076 set_par_threads(n_workers); |
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|
5077 workers()->run_task(&redirty_task); |
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|
5078 set_par_threads(0); |
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diff
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|
5079 } else { |
570cb6369f17
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|
5080 redirty_task.work(0); |
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tschatzl
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diff
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|
5081 } |
17756
a07bea31ef35
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tschatzl
parents:
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diff
changeset
|
5082 |
a07bea31ef35
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diff
changeset
|
5083 DirtyCardQueueSet& dcq = JavaThread::dirty_card_queue_set(); |
a07bea31ef35
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changeset
|
5084 dcq.merge_bufferlists(&dirty_card_queue_set()); |
a07bea31ef35
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changeset
|
5085 assert(dirty_card_queue_set().completed_buffers_num() == 0, "All should be consumed"); |
a07bea31ef35
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changeset
|
5086 |
a07bea31ef35
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diff
changeset
|
5087 g1_policy()->phase_times()->record_redirty_logged_cards_time_ms((os::elapsedTime() - redirty_logged_cards_start) * 1000.0); |
a07bea31ef35
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parents:
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diff
changeset
|
5088 } |
a07bea31ef35
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tschatzl
parents:
17755
diff
changeset
|
5089 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5090 // Weak Reference Processing support |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5091 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5092 // An always "is_alive" closure that is used to preserve referents. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5093 // 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
|
5094 // of referent objects that are pointed to by reference objects |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5095 // discovered by the CM ref processor. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5096 class G1AlwaysAliveClosure: public BoolObjectClosure { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5097 G1CollectedHeap* _g1; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5098 public: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5099 G1AlwaysAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5100 bool do_object_b(oop p) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5101 if (p != NULL) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5102 return true; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5103 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5104 return false; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5105 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5106 }; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5107 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5108 bool G1STWIsAliveClosure::do_object_b(oop p) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5109 // An object is reachable if it is outside the collection set, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5110 // or is inside and copied. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5111 return !_g1->obj_in_cs(p) || p->is_forwarded(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5112 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5113 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5114 // Non Copying Keep Alive closure |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5115 class G1KeepAliveClosure: public OopClosure { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5116 G1CollectedHeap* _g1; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5117 public: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5118 G1KeepAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5119 void do_oop(narrowOop* p) { guarantee(false, "Not needed"); } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5120 void do_oop( oop* p) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5121 oop obj = *p; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5122 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5123 if (_g1->obj_in_cs(obj)) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5124 assert( obj->is_forwarded(), "invariant" ); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5125 *p = obj->forwardee(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5126 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5127 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5128 }; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5129 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5130 // Copying Keep Alive closure - can be called from both |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5131 // serial and parallel code as long as different worker |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5132 // threads utilize different G1ParScanThreadState instances |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5133 // and different queues. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5134 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5135 class G1CopyingKeepAliveClosure: public OopClosure { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5136 G1CollectedHeap* _g1h; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5137 OopClosure* _copy_non_heap_obj_cl; |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5138 OopsInHeapRegionClosure* _copy_metadata_obj_cl; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5139 G1ParScanThreadState* _par_scan_state; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5140 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5141 public: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5142 G1CopyingKeepAliveClosure(G1CollectedHeap* g1h, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5143 OopClosure* non_heap_obj_cl, |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5144 OopsInHeapRegionClosure* metadata_obj_cl, |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5145 G1ParScanThreadState* pss): |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5146 _g1h(g1h), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5147 _copy_non_heap_obj_cl(non_heap_obj_cl), |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5148 _copy_metadata_obj_cl(metadata_obj_cl), |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5149 _par_scan_state(pss) |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5150 {} |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5151 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5152 virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5153 virtual void do_oop( oop* p) { do_oop_work(p); } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5154 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5155 template <class T> void do_oop_work(T* p) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5156 oop obj = oopDesc::load_decode_heap_oop(p); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5157 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5158 if (_g1h->obj_in_cs(obj)) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5159 // If the referent object has been forwarded (either copied |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5160 // 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
|
5161 // evacuation failure) then we need to update the reference |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5162 // field and, if both reference and referent are in the G1 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5163 // heap, update the RSet for the referent. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5164 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5165 // 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
|
5166 // it alive by policy. Therefore we have copy the referent. |
4dfb2df418f2
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|
5167 // |
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|
5168 // If the reference field is in the G1 heap then we can push |
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|
5169 // on the PSS queue. When the queue is drained (after each |
4dfb2df418f2
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diff
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|
5170 // phase of reference processing) the object and it's followers |
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|
5171 // will be copied, the reference field set to point to the |
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|
5172 // new location, and the RSet updated. Otherwise we need to |
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|
5173 // use the the non-heap or metadata closures directly to copy |
10405 | 5174 // the referent object and update the pointer, while avoiding |
3979
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|
5175 // updating the RSet. |
4dfb2df418f2
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diff
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|
5176 |
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|
5177 if (_g1h->is_in_g1_reserved(p)) { |
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|
5178 _par_scan_state->push_on_queue(p); |
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|
5179 } else { |
17935
7384f6a12fc1
8038212: Method::is_valid_method() check has performance regression impact for stackwalking
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|
5180 assert(!Metaspace::contains((const void*)p), |
6725
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5181 err_msg("Otherwise need to call _copy_metadata_obj_cl->do_oop(p) " |
da91efe96a93
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|
5182 PTR_FORMAT, p)); |
3979
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|
5183 _copy_non_heap_obj_cl->do_oop(p); |
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|
5184 } |
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diff
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|
5185 } |
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|
5186 } |
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|
5187 }; |
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|
5188 |
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|
5189 // Serial drain queue closure. Called as the 'complete_gc' |
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|
5190 // closure for each discovered list in some of the |
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|
5191 // reference processing phases. |
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|
5192 |
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|
5193 class G1STWDrainQueueClosure: public VoidClosure { |
4dfb2df418f2
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|
5194 protected: |
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|
5195 G1CollectedHeap* _g1h; |
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|
5196 G1ParScanThreadState* _par_scan_state; |
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|
5197 |
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|
5198 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } |
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|
5199 |
4dfb2df418f2
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|
5200 public: |
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|
5201 G1STWDrainQueueClosure(G1CollectedHeap* g1h, G1ParScanThreadState* pss) : |
4dfb2df418f2
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|
5202 _g1h(g1h), |
4dfb2df418f2
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|
5203 _par_scan_state(pss) |
4dfb2df418f2
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|
5204 { } |
4dfb2df418f2
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parents:
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diff
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|
5205 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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|
5206 void do_void() { |
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|
5207 G1ParScanThreadState* const pss = par_scan_state(); |
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|
5208 pss->trim_queue(); |
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|
5209 } |
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|
5210 }; |
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|
5211 |
4dfb2df418f2
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|
5212 // Parallel Reference Processing closures |
4dfb2df418f2
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|
5213 |
4dfb2df418f2
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diff
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|
5214 // Implementation of AbstractRefProcTaskExecutor for parallel reference |
4dfb2df418f2
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parents:
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diff
changeset
|
5215 // processing during G1 evacuation pauses. |
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parents:
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|
5216 |
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|
5217 class G1STWRefProcTaskExecutor: public AbstractRefProcTaskExecutor { |
4dfb2df418f2
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|
5218 private: |
4dfb2df418f2
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parents:
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diff
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|
5219 G1CollectedHeap* _g1h; |
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|
5220 RefToScanQueueSet* _queues; |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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|
5221 FlexibleWorkGang* _workers; |
3979
4dfb2df418f2
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parents:
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|
5222 int _active_workers; |
4dfb2df418f2
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parents:
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diff
changeset
|
5223 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
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|
5224 public: |
4dfb2df418f2
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diff
changeset
|
5225 G1STWRefProcTaskExecutor(G1CollectedHeap* g1h, |
4095
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jmasa
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diff
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|
5226 FlexibleWorkGang* workers, |
3979
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diff
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|
5227 RefToScanQueueSet *task_queues, |
4dfb2df418f2
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parents:
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diff
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|
5228 int n_workers) : |
4dfb2df418f2
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parents:
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diff
changeset
|
5229 _g1h(g1h), |
4dfb2df418f2
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parents:
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diff
changeset
|
5230 _queues(task_queues), |
4dfb2df418f2
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parents:
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diff
changeset
|
5231 _workers(workers), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5232 _active_workers(n_workers) |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5233 { |
4dfb2df418f2
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parents:
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diff
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|
5234 assert(n_workers > 0, "shouldn't call this otherwise"); |
4dfb2df418f2
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parents:
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diff
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|
5235 } |
4dfb2df418f2
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parents:
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diff
changeset
|
5236 |
4dfb2df418f2
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parents:
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diff
changeset
|
5237 // Executes the given task using concurrent marking worker threads. |
4dfb2df418f2
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parents:
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diff
changeset
|
5238 virtual void execute(ProcessTask& task); |
4dfb2df418f2
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parents:
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diff
changeset
|
5239 virtual void execute(EnqueueTask& task); |
4dfb2df418f2
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johnc
parents:
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diff
changeset
|
5240 }; |
4dfb2df418f2
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parents:
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diff
changeset
|
5241 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5242 // Gang task for possibly parallel reference processing |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5243 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
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|
5244 class G1STWRefProcTaskProxy: public AbstractGangTask { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5245 typedef AbstractRefProcTaskExecutor::ProcessTask ProcessTask; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5246 ProcessTask& _proc_task; |
4dfb2df418f2
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parents:
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diff
changeset
|
5247 G1CollectedHeap* _g1h; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5248 RefToScanQueueSet *_task_queues; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5249 ParallelTaskTerminator* _terminator; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5250 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5251 public: |
4dfb2df418f2
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johnc
parents:
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diff
changeset
|
5252 G1STWRefProcTaskProxy(ProcessTask& proc_task, |
4dfb2df418f2
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parents:
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diff
changeset
|
5253 G1CollectedHeap* g1h, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5254 RefToScanQueueSet *task_queues, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5255 ParallelTaskTerminator* terminator) : |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5256 AbstractGangTask("Process reference objects in parallel"), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5257 _proc_task(proc_task), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5258 _g1h(g1h), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5259 _task_queues(task_queues), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5260 _terminator(terminator) |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5261 {} |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5262 |
4728
441e946dc1af
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jmasa
parents:
4711
diff
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|
5263 virtual void work(uint worker_id) { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5264 // The reference processing task executed by a single worker. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5265 ResourceMark rm; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5266 HandleMark hm; |
4dfb2df418f2
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johnc
parents:
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diff
changeset
|
5267 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5268 G1STWIsAliveClosure is_alive(_g1h); |
4dfb2df418f2
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parents:
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diff
changeset
|
5269 |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5270 G1ParScanThreadState pss(_g1h, worker_id, NULL); |
3979
4dfb2df418f2
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parents:
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diff
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|
5271 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
5272 |
3979
4dfb2df418f2
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parents:
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diff
changeset
|
5273 pss.set_evac_failure_closure(&evac_failure_cl); |
4dfb2df418f2
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parents:
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diff
changeset
|
5274 |
4dfb2df418f2
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diff
changeset
|
5275 G1ParScanExtRootClosure only_copy_non_heap_cl(_g1h, &pss, NULL); |
6725
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coleenp
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6629
diff
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|
5276 G1ParScanMetadataClosure only_copy_metadata_cl(_g1h, &pss, NULL); |
3979
4dfb2df418f2
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parents:
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diff
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|
5277 |
4dfb2df418f2
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johnc
parents:
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diff
changeset
|
5278 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
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|
5279 G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(_g1h, &pss, NULL); |
3979
4dfb2df418f2
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diff
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|
5280 |
4dfb2df418f2
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diff
changeset
|
5281 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
6725
da91efe96a93
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coleenp
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6629
diff
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|
5282 OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
3979
4dfb2df418f2
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parents:
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diff
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|
5283 |
4dfb2df418f2
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johnc
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diff
changeset
|
5284 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5285 // We also need to mark copied objects. |
4dfb2df418f2
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3973
diff
changeset
|
5286 copy_non_heap_cl = ©_mark_non_heap_cl; |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5287 copy_metadata_cl = ©_mark_metadata_cl; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5288 } |
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
5289 |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5290 // Keep alive closure. |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5291 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, copy_metadata_cl, &pss); |
3979
4dfb2df418f2
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parents:
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diff
changeset
|
5292 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5293 // Complete GC closure |
4dfb2df418f2
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parents:
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diff
changeset
|
5294 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _task_queues, _terminator); |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5295 |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5296 // 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
|
5297 _proc_task.work(worker_id, is_alive, keep_alive, drain_queue); |
3979
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|
5298 |
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|
5299 // Note we cannot assert that the refs array is empty here as not all |
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|
5300 // of the processing tasks (specifically phase2 - pp2_work) execute |
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|
5301 // the complete_gc closure (which ordinarily would drain the queue) so |
4dfb2df418f2
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|
5302 // the queue may not be empty. |
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parents:
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diff
changeset
|
5303 } |
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parents:
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diff
changeset
|
5304 }; |
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diff
changeset
|
5305 |
4dfb2df418f2
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parents:
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diff
changeset
|
5306 // Driver routine for parallel reference processing. |
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diff
changeset
|
5307 // Creates an instance of the ref processing gang |
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parents:
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diff
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|
5308 // task and has the worker threads execute it. |
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diff
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|
5309 void G1STWRefProcTaskExecutor::execute(ProcessTask& proc_task) { |
4dfb2df418f2
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|
5310 assert(_workers != NULL, "Need parallel worker threads."); |
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diff
changeset
|
5311 |
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|
5312 ParallelTaskTerminator terminator(_active_workers, _queues); |
4dfb2df418f2
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|
5313 G1STWRefProcTaskProxy proc_task_proxy(proc_task, _g1h, _queues, &terminator); |
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|
5314 |
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changeset
|
5315 _g1h->set_par_threads(_active_workers); |
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|
5316 _workers->run_task(&proc_task_proxy); |
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|
5317 _g1h->set_par_threads(0); |
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|
5318 } |
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|
5319 |
4dfb2df418f2
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parents:
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|
5320 // Gang task for parallel reference enqueueing. |
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parents:
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diff
changeset
|
5321 |
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|
5322 class G1STWRefEnqueueTaskProxy: public AbstractGangTask { |
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|
5323 typedef AbstractRefProcTaskExecutor::EnqueueTask EnqueueTask; |
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|
5324 EnqueueTask& _enq_task; |
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parents:
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diff
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|
5325 |
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|
5326 public: |
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parents:
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diff
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|
5327 G1STWRefEnqueueTaskProxy(EnqueueTask& enq_task) : |
4dfb2df418f2
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parents:
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|
5328 AbstractGangTask("Enqueue reference objects in parallel"), |
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parents:
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diff
changeset
|
5329 _enq_task(enq_task) |
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|
5330 { } |
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|
5331 |
4728
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|
5332 virtual void work(uint worker_id) { |
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|
5333 _enq_task.work(worker_id); |
3979
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|
5334 } |
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diff
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|
5335 }; |
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|
5336 |
10405 | 5337 // Driver routine for parallel reference enqueueing. |
3979
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parents:
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|
5338 // Creates an instance of the ref enqueueing gang |
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parents:
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diff
changeset
|
5339 // task and has the worker threads execute it. |
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parents:
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diff
changeset
|
5340 |
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|
5341 void G1STWRefProcTaskExecutor::execute(EnqueueTask& enq_task) { |
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diff
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|
5342 assert(_workers != NULL, "Need parallel worker threads."); |
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parents:
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diff
changeset
|
5343 |
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parents:
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diff
changeset
|
5344 G1STWRefEnqueueTaskProxy enq_task_proxy(enq_task); |
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parents:
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diff
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|
5345 |
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parents:
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diff
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|
5346 _g1h->set_par_threads(_active_workers); |
4dfb2df418f2
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|
5347 _workers->run_task(&enq_task_proxy); |
4dfb2df418f2
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|
5348 _g1h->set_par_threads(0); |
4dfb2df418f2
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parents:
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diff
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|
5349 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5350 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5351 // End of weak reference support closures |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5352 |
4dfb2df418f2
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parents:
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diff
changeset
|
5353 // Abstract task used to preserve (i.e. copy) any referent objects |
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|
5354 // that are in the collection set and are pointed to by reference |
4dfb2df418f2
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parents:
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diff
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|
5355 // objects discovered by the CM ref processor. |
4dfb2df418f2
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parents:
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diff
changeset
|
5356 |
4dfb2df418f2
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parents:
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diff
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|
5357 class G1ParPreserveCMReferentsTask: public AbstractGangTask { |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5358 protected: |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5359 G1CollectedHeap* _g1h; |
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6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5360 RefToScanQueueSet *_queues; |
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parents:
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diff
changeset
|
5361 ParallelTaskTerminator _terminator; |
4728
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7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5362 uint _n_workers; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5363 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5364 public: |
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
5365 G1ParPreserveCMReferentsTask(G1CollectedHeap* g1h,int workers, RefToScanQueueSet *task_queues) : |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5366 AbstractGangTask("ParPreserveCMReferents"), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5367 _g1h(g1h), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5368 _queues(task_queues), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5369 _terminator(workers, _queues), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5370 _n_workers(workers) |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5371 { } |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5372 |
4728
441e946dc1af
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jmasa
parents:
4711
diff
changeset
|
5373 void work(uint worker_id) { |
3979
4dfb2df418f2
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parents:
3973
diff
changeset
|
5374 ResourceMark rm; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5375 HandleMark hm; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5376 |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5377 G1ParScanThreadState pss(_g1h, worker_id, NULL); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5378 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
5379 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5380 pss.set_evac_failure_closure(&evac_failure_cl); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5381 |
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
5382 assert(pss.queue_is_empty(), "both queue and overflow should be empty"); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5383 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5384 G1ParScanExtRootClosure only_copy_non_heap_cl(_g1h, &pss, NULL); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5385 G1ParScanMetadataClosure only_copy_metadata_cl(_g1h, &pss, NULL); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5386 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5387 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5388 G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(_g1h, &pss, NULL); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5389 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5390 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5391 OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5392 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5393 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5394 // We also need to mark copied objects. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5395 copy_non_heap_cl = ©_mark_non_heap_cl; |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5396 copy_metadata_cl = ©_mark_metadata_cl; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5397 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5398 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5399 // Is alive closure |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5400 G1AlwaysAliveClosure always_alive(_g1h); |
4dfb2df418f2
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parents:
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diff
changeset
|
5401 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5402 // Copying keep alive closure. Applied to referent objects that need |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5403 // to be copied. |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5404 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, copy_metadata_cl, &pss); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5405 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5406 ReferenceProcessor* rp = _g1h->ref_processor_cm(); |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5407 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5408 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
|
5409 uint stride = MIN2(MAX2(_n_workers, 1U), limit); |
3979
4dfb2df418f2
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parents:
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diff
changeset
|
5410 |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5411 // limit is set using max_num_q() - which was set using ParallelGCThreads. |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5412 // So this must be true - but assert just in case someone decides to |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5413 // change the worker ids. |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5414 assert(0 <= worker_id && worker_id < limit, "sanity"); |
3979
4dfb2df418f2
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parents:
3973
diff
changeset
|
5415 assert(!rp->discovery_is_atomic(), "check this code"); |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5416 |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5417 // 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
|
5418 for (uint idx = worker_id; idx < limit; idx += stride) { |
4014
bf2d2b8b1726
7095243: Disambiguate ReferenceProcessor::_discoveredSoftRefs
johnc
parents:
4013
diff
changeset
|
5419 DiscoveredList& ref_list = rp->discovered_refs()[idx]; |
3979
4dfb2df418f2
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parents:
3973
diff
changeset
|
5420 |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5421 DiscoveredListIterator iter(ref_list, &keep_alive, &always_alive); |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5422 while (iter.has_next()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5423 // Since discovery is not atomic for the CM ref processor, we |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5424 // can see some null referent objects. |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5425 iter.load_ptrs(DEBUG_ONLY(true)); |
4dfb2df418f2
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diff
changeset
|
5426 oop ref = iter.obj(); |
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diff
changeset
|
5427 |
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diff
changeset
|
5428 // This will filter nulls. |
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diff
changeset
|
5429 if (iter.is_referent_alive()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5430 iter.make_referent_alive(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5431 } |
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6484982: G1: process references during evacuation pauses
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diff
changeset
|
5432 iter.move_to_next(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5433 } |
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parents:
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diff
changeset
|
5434 } |
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parents:
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diff
changeset
|
5435 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5436 // Drain the queue - which may cause stealing |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5437 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _queues, &_terminator); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5438 drain_queue.do_void(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5439 // Allocation buffers were retired at the end of G1ParEvacuateFollowersClosure |
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
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diff
changeset
|
5440 assert(pss.queue_is_empty(), "should be"); |
3979
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diff
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|
5441 } |
4dfb2df418f2
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parents:
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diff
changeset
|
5442 }; |
4dfb2df418f2
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diff
changeset
|
5443 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5444 // Weak Reference processing during an evacuation pause (part 1). |
6819 | 5445 void G1CollectedHeap::process_discovered_references(uint no_of_gc_workers) { |
3979
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diff
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|
5446 double ref_proc_start = os::elapsedTime(); |
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diff
changeset
|
5447 |
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diff
changeset
|
5448 ReferenceProcessor* rp = _ref_processor_stw; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5449 assert(rp->discovery_enabled(), "should have been enabled"); |
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6484982: G1: process references during evacuation pauses
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diff
changeset
|
5450 |
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6484982: G1: process references during evacuation pauses
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diff
changeset
|
5451 // Any reference objects, in the collection set, that were 'discovered' |
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diff
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|
5452 // by the CM ref processor should have already been copied (either by |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5453 // applying the external root copy closure to the discovered lists, or |
4dfb2df418f2
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diff
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|
5454 // by following an RSet entry). |
4dfb2df418f2
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diff
changeset
|
5455 // |
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diff
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|
5456 // But some of the referents, that are in the collection set, that these |
4dfb2df418f2
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diff
changeset
|
5457 // reference objects point to may not have been copied: the STW ref |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
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|
5458 // processor would have seen that the reference object had already |
4dfb2df418f2
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diff
changeset
|
5459 // been 'discovered' and would have skipped discovering the reference, |
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diff
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|
5460 // but would not have treated the reference object as a regular oop. |
10405 | 5461 // As a result the copy closure would not have been applied to the |
3979
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parents:
3973
diff
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|
5462 // referent object. |
4dfb2df418f2
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parents:
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diff
changeset
|
5463 // |
4dfb2df418f2
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diff
changeset
|
5464 // We need to explicitly copy these referent objects - the references |
4dfb2df418f2
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diff
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|
5465 // will be processed at the end of remarking. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5466 // |
4dfb2df418f2
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diff
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|
5467 // We also need to do this copying before we process the reference |
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diff
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|
5468 // objects discovered by the STW ref processor in case one of these |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5469 // referents points to another object which is also referenced by an |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5470 // object discovered by the STW ref processor. |
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diff
changeset
|
5471 |
4711 | 5472 assert(!G1CollectedHeap::use_parallel_gc_threads() || |
6819 | 5473 no_of_gc_workers == workers()->active_workers(), |
5474 "Need to reset active GC workers"); | |
5475 | |
5476 set_par_threads(no_of_gc_workers); | |
5477 G1ParPreserveCMReferentsTask keep_cm_referents(this, | |
5478 no_of_gc_workers, | |
5479 _task_queues); | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5480 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5481 if (G1CollectedHeap::use_parallel_gc_threads()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5482 workers()->run_task(&keep_cm_referents); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5483 } else { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5484 keep_cm_referents.work(0); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5485 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5486 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5487 set_par_threads(0); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5488 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5489 // Closure to test whether a referent is alive. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5490 G1STWIsAliveClosure is_alive(this); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5491 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5492 // Even when parallel reference processing is enabled, the processing |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5493 // 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
|
5494 // 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
|
5495 // JNI refs. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5496 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5497 // Use only a single queue for this PSS. |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5498 G1ParScanThreadState pss(this, 0, NULL); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5499 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5500 // We do not embed a reference processor in the copying/scanning |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5501 // closures while we're actually processing the discovered |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5502 // reference objects. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5503 G1ParScanHeapEvacFailureClosure evac_failure_cl(this, &pss, NULL); |
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
5504 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5505 pss.set_evac_failure_closure(&evac_failure_cl); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5506 |
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
5507 assert(pss.queue_is_empty(), "pre-condition"); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5508 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5509 G1ParScanExtRootClosure only_copy_non_heap_cl(this, &pss, NULL); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5510 G1ParScanMetadataClosure only_copy_metadata_cl(this, &pss, NULL); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5511 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5512 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(this, &pss, NULL); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5513 G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(this, &pss, NULL); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5514 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5515 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5516 OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5517 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5518 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5519 // We also need to mark copied objects. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5520 copy_non_heap_cl = ©_mark_non_heap_cl; |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5521 copy_metadata_cl = ©_mark_metadata_cl; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5522 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5523 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5524 // Keep alive closure. |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5525 G1CopyingKeepAliveClosure keep_alive(this, copy_non_heap_cl, copy_metadata_cl, &pss); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5526 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5527 // Serial Complete GC closure |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5528 G1STWDrainQueueClosure drain_queue(this, &pss); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5529 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5530 // Setup the soft refs policy... |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5531 rp->setup_policy(false); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5532 |
10405 | 5533 ReferenceProcessorStats stats; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5534 if (!rp->processing_is_mt()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5535 // Serial reference processing... |
10405 | 5536 stats = rp->process_discovered_references(&is_alive, |
5537 &keep_alive, | |
5538 &drain_queue, | |
5539 NULL, | |
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5540 _gc_timer_stw, |
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5541 _gc_tracer_stw->gc_id()); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5542 } else { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5543 // Parallel reference processing |
6819 | 5544 assert(rp->num_q() == no_of_gc_workers, "sanity"); |
5545 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
5546 | |
5547 G1STWRefProcTaskExecutor par_task_executor(this, workers(), _task_queues, no_of_gc_workers); | |
10405 | 5548 stats = rp->process_discovered_references(&is_alive, |
5549 &keep_alive, | |
5550 &drain_queue, | |
5551 &par_task_executor, | |
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5552 _gc_timer_stw, |
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5553 _gc_tracer_stw->gc_id()); |
10405 | 5554 } |
5555 | |
5556 _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
|
5557 |
983092f35ff7
8028710: G1 does not retire allocation buffers after reference processing work
tschatzl
parents:
20212
diff
changeset
|
5558 // We have completed copying any necessary live referent objects. |
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
5559 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
|
5560 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5561 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
|
5562 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
|
5563 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5564 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5565 // Weak Reference processing during an evacuation pause (part 2). |
6819 | 5566 void G1CollectedHeap::enqueue_discovered_references(uint no_of_gc_workers) { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5567 double ref_enq_start = os::elapsedTime(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5568 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5569 ReferenceProcessor* rp = _ref_processor_stw; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5570 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
|
5571 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5572 // Now enqueue any remaining on the discovered lists on to |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5573 // the pending list. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5574 if (!rp->processing_is_mt()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5575 // Serial reference processing... |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5576 rp->enqueue_discovered_references(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5577 } else { |
10405 | 5578 // Parallel reference enqueueing |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5579 |
6819 | 5580 assert(no_of_gc_workers == workers()->active_workers(), |
5581 "Need to reset active workers"); | |
5582 assert(rp->num_q() == no_of_gc_workers, "sanity"); | |
5583 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
5584 | |
5585 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
|
5586 rp->enqueue_discovered_references(&par_task_executor); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5587 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5588 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5589 rp->verify_no_references_recorded(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5590 assert(!rp->discovery_enabled(), "should have been disabled"); |
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 // FIXME |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5593 // 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
|
5594 // Should we do that here also? We could, but it is a serial operation |
10405 | 5595 // and could significantly increase the pause time. |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5596 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5597 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
|
5598 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
|
5599 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5600 |
10405 | 5601 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
|
5602 _expand_heap_after_alloc_failure = true; |
10405 | 5603 _evacuation_failed = false; |
342 | 5604 |
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5605 // 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
|
5606 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
|
5607 |
342 | 5608 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
|
5609 |
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5610 // Disable the hot card cache. |
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5611 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
|
5612 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
|
5613 hot_card_cache->set_use_cache(false); |
889 | 5614 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5615 uint n_workers; |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5616 if (G1CollectedHeap::use_parallel_gc_threads()) { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5617 n_workers = |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5618 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5619 workers()->active_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5620 Threads::number_of_non_daemon_threads()); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5621 assert(UseDynamicNumberOfGCThreads || |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5622 n_workers == workers()->total_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5623 "If not dynamic should be using all the workers"); |
4711 | 5624 workers()->set_active_workers(n_workers); |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5625 set_par_threads(n_workers); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5626 } else { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5627 assert(n_par_threads() == 0, |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5628 "Should be the original non-parallel value"); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5629 n_workers = 1; |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5630 } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5631 |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5632 G1ParTask g1_par_task(this, _task_queues); |
342 | 5633 |
5634 init_for_evac_failure(NULL); | |
5635 | |
5636 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
|
5637 |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5638 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
|
5639 double start_par_time_sec = os::elapsedTime(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5640 double end_par_time_sec; |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5641 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5642 { |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5643 StrongRootsScope srs(this); |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5644 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5645 if (G1CollectedHeap::use_parallel_gc_threads()) { |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5646 // 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
|
5647 if (ParallelGCVerbose) G1ParScanThreadState::print_termination_stats_hdr(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5648 // These tasks use ShareHeap::_process_strong_tasks |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5649 assert(UseDynamicNumberOfGCThreads || |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5650 workers()->active_workers() == workers()->total_workers(), |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5651 "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
|
5652 workers()->run_task(&g1_par_task); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5653 } else { |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5654 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
|
5655 g1_par_task.work(0); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5656 } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5657 end_par_time_sec = os::elapsedTime(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5658 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5659 // 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
|
5660 // 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
|
5661 // 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
|
5662 // 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
|
5663 // reported parallel time. |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5664 } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5665 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5666 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
|
5667 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
|
5668 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5669 double code_root_fixup_time_ms = |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5670 (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
|
5671 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
|
5672 |
342 | 5673 set_par_threads(0); |
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5674 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5675 // Process any discovered reference objects - we have |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5676 // to do this _before_ we retire the GC alloc regions |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5677 // as we may have to copy some 'reachable' referent |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5678 // objects (and their reachable sub-graphs) that were |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5679 // not copied during the pause. |
6819 | 5680 process_discovered_references(n_workers); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5681 |
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5682 // Weak root processing. |
342 | 5683 { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5684 G1STWIsAliveClosure is_alive(this); |
342 | 5685 G1KeepAliveClosure keep_alive(this); |
5686 JNIHandles::weak_oops_do(&is_alive, &keep_alive); | |
17764 | 5687 if (G1StringDedup::is_enabled()) { |
5688 G1StringDedup::unlink_or_oops_do(&is_alive, &keep_alive); | |
5689 } | |
342 | 5690 } |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5691 |
10405 | 5692 release_gc_alloc_regions(n_workers, evacuation_info); |
342 | 5693 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
|
5694 |
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5695 // 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
|
5696 // 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
|
5697 // 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
|
5698 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
|
5699 hot_card_cache->set_use_cache(true); |
342 | 5700 |
12080 | 5701 // Migrate the strong code roots attached to each region in |
5702 // the collection set. Ideally we would like to do this | |
5703 // after we have finished the scanning/evacuation of the | |
5704 // strong code roots for a particular heap region. | |
5705 migrate_strong_code_roots(); | |
5706 | |
17753
191174b49bec
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
17749
diff
changeset
|
5707 purge_code_root_memory(); |
191174b49bec
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
17749
diff
changeset
|
5708 |
12080 | 5709 if (g1_policy()->during_initial_mark_pause()) { |
5710 // Reset the claim values set during marking the strong code roots | |
5711 reset_heap_region_claim_values(); | |
5712 } | |
5713 | |
342 | 5714 finalize_for_evac_failure(); |
5715 | |
5716 if (evacuation_failed()) { | |
5717 remove_self_forwarding_pointers(); | |
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5718 |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5719 // Reset the G1EvacuationFailureALot counters and flags |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5720 // 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
|
5721 // evacuation failure occurs. |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5722 NOT_PRODUCT(reset_evacuation_should_fail();) |
342 | 5723 } |
5724 | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5725 // Enqueue any remaining references remaining on the STW |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5726 // reference processor's discovered lists. We need to do |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5727 // this after the card table is cleaned (and verified) as |
10405 | 5728 // the act of enqueueing entries on to the pending list |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5729 // will log these updates (and dirty their associated |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5730 // cards). We need these updates logged to update any |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5731 // RSets. |
6819 | 5732 enqueue_discovered_references(n_workers); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5733 |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5734 if (G1DeferredRSUpdate) { |
17756
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5735 redirty_logged_cards(); |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5736 } |
342 | 5737 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
5738 } | |
5739 | |
2152 | 5740 void G1CollectedHeap::free_region(HeapRegion* hr, |
5741 FreeRegionList* free_list, | |
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
5742 bool par, |
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
5743 bool locked) { |
2152 | 5744 assert(!hr->isHumongous(), "this is only for non-humongous regions"); |
5745 assert(!hr->is_empty(), "the region should not be empty"); | |
5746 assert(free_list != NULL, "pre-condition"); | |
5747 | |
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5748 // 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
|
5749 // 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
|
5750 // (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
|
5751 if (!hr->is_young()) { |
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5752 _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
|
5753 } |
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
5754 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
|
5755 free_list->add_ordered(hr); |
2152 | 5756 } |
5757 | |
5758 void G1CollectedHeap::free_humongous_region(HeapRegion* hr, | |
5759 FreeRegionList* free_list, | |
5760 bool par) { | |
5761 assert(hr->startsHumongous(), "this is only for starts humongous regions"); | |
5762 assert(free_list != NULL, "pre-condition"); | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5763 |
2152 | 5764 size_t hr_capacity = hr->capacity(); |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5765 // 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
|
5766 // otherwise the information will be gone. |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5767 uint last_index = hr->last_hc_index(); |
2152 | 5768 hr->set_notHumongous(); |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5769 free_region(hr, free_list, par); |
2152 | 5770 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
5771 uint i = hr->hrs_index() + 1; |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5772 while (i < last_index) { |
3766 | 5773 HeapRegion* curr_hr = region_at(i); |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5774 assert(curr_hr->continuesHumongous(), "invariant"); |
2152 | 5775 curr_hr->set_notHumongous(); |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5776 free_region(curr_hr, free_list, par); |
2152 | 5777 i += 1; |
5778 } | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5779 } |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5780 |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5781 void G1CollectedHeap::remove_from_old_sets(const HeapRegionSetCount& old_regions_removed, |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5782 const HeapRegionSetCount& humongous_regions_removed) { |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5783 if (old_regions_removed.length() > 0 || humongous_regions_removed.length() > 0) { |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5784 MutexLockerEx x(OldSets_lock, Mutex::_no_safepoint_check_flag); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5785 _old_set.bulk_remove(old_regions_removed); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5786 _humongous_set.bulk_remove(humongous_regions_removed); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5787 } |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5788 |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5789 } |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5790 |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5791 void G1CollectedHeap::prepend_to_freelist(FreeRegionList* list) { |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5792 assert(list != NULL, "list can't be null"); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5793 if (!list->is_empty()) { |
2152 | 5794 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
|
5795 _free_list.add_ordered(list); |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5796 } |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5797 } |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5798 |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5799 void G1CollectedHeap::decrement_summary_bytes(size_t bytes) { |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5800 assert(_summary_bytes_used >= bytes, |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5801 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
|
5802 _summary_bytes_used, bytes)); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5803 _summary_bytes_used -= bytes; |
342 | 5804 } |
5805 | |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5806 class G1ParCleanupCTTask : public AbstractGangTask { |
12343 | 5807 G1SATBCardTableModRefBS* _ct_bs; |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5808 G1CollectedHeap* _g1h; |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5809 HeapRegion* volatile _su_head; |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5810 public: |
12343 | 5811 G1ParCleanupCTTask(G1SATBCardTableModRefBS* ct_bs, |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
5812 G1CollectedHeap* g1h) : |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5813 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
|
5814 _ct_bs(ct_bs), _g1h(g1h) { } |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5815 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5816 void work(uint worker_id) { |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5817 HeapRegion* r; |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5818 while (r = _g1h->pop_dirty_cards_region()) { |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5819 clear_cards(r); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5820 } |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5821 } |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5822 |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5823 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
|
5824 // 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
|
5825 if (!r->is_survivor()) { |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5826 _ct_bs->clear(MemRegion(r->bottom(), r->end())); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5827 } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5828 } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5829 }; |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5830 |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5831 #ifndef PRODUCT |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5832 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
|
5833 G1CollectedHeap* _g1h; |
12343 | 5834 G1SATBCardTableModRefBS* _ct_bs; |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5835 public: |
12343 | 5836 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
|
5837 : _g1h(g1h), _ct_bs(ct_bs) { } |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
5838 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
|
5839 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
|
5840 _g1h->verify_dirty_region(r); |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5841 } else { |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5842 _g1h->verify_not_dirty_region(r); |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5843 } |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5844 return false; |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5845 } |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5846 }; |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
5847 |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5848 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
|
5849 // All of the region should be clean. |
12343 | 5850 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
|
5851 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
|
5852 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
|
5853 } |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5854 |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5855 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
|
5856 // 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
|
5857 // 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
|
5858 // 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
|
5859 // 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
|
5860 // 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
|
5861 // 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
|
5862 // is dirty. |
12343 | 5863 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
|
5864 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
|
5865 if (hr->is_young()) { |
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
5866 ct_bs->verify_g1_young_region(mr); |
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
5867 } else { |
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
5868 ct_bs->verify_dirty_region(mr); |
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
5869 } |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5870 } |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5871 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
5872 void G1CollectedHeap::verify_dirty_young_list(HeapRegion* head) { |
12343 | 5873 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
5874 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
|
5875 verify_dirty_region(hr); |
2433
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7023069: G1: Introduce symmetric locking in the slow allocation path
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|
5876 } |
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|
5877 } |
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|
5878 |
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|
5879 void G1CollectedHeap::verify_dirty_young_regions() { |
abdfc822206f
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|
5880 verify_dirty_young_list(_young_list->first_region()); |
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|
5881 } |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
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|
5882 #endif |
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|
5883 |
342 | 5884 void G1CollectedHeap::cleanUpCardTable() { |
12343 | 5885 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
342 | 5886 double start = os::elapsedTime(); |
5887 | |
4023 | 5888 { |
5889 // Iterate over the dirty cards region list. | |
5890 G1ParCleanupCTTask cleanup_task(ct_bs, this); | |
5891 | |
4711 | 5892 if (G1CollectedHeap::use_parallel_gc_threads()) { |
5893 set_par_threads(); | |
4023 | 5894 workers()->run_task(&cleanup_task); |
5895 set_par_threads(0); | |
5896 } else { | |
5897 while (_dirty_cards_region_list) { | |
5898 HeapRegion* r = _dirty_cards_region_list; | |
5899 cleanup_task.clear_cards(r); | |
5900 _dirty_cards_region_list = r->get_next_dirty_cards_region(); | |
5901 if (_dirty_cards_region_list == r) { | |
5902 // The last region. | |
5903 _dirty_cards_region_list = NULL; | |
5904 } | |
5905 r->set_next_dirty_cards_region(NULL); | |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
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diff
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|
5906 } |
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6819065: G1: eliminate high serial card table clearing time
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|
5907 } |
4023 | 5908 #ifndef PRODUCT |
5909 if (G1VerifyCTCleanup || VerifyAfterGC) { | |
5910 G1VerifyCardTableCleanup cleanup_verifier(this, ct_bs); | |
5911 heap_region_iterate(&cleanup_verifier); | |
5912 } | |
5913 #endif | |
940
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|
5914 } |
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|
5915 |
342 | 5916 double elapsed = os::elapsedTime() - start; |
6219
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|
5917 g1_policy()->phase_times()->record_clear_ct_time(elapsed * 1000.0); |
342 | 5918 } |
5919 | |
10405 | 5920 void G1CollectedHeap::free_collection_set(HeapRegion* cs_head, EvacuationInfo& evacuation_info) { |
2152 | 5921 size_t pre_used = 0; |
5922 FreeRegionList local_free_list("Local List for CSet Freeing"); | |
5923 | |
342 | 5924 double young_time_ms = 0.0; |
5925 double non_young_time_ms = 0.0; | |
5926 | |
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|
5927 // Since the collection set is a superset of the the young list, |
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
5928 // all we need to do to clear the young list is clear its |
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
5929 // head and length, and unlink any young regions in the code below |
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|
5930 _young_list->clear(); |
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|
5931 |
342 | 5932 G1CollectorPolicy* policy = g1_policy(); |
5933 | |
5934 double start_sec = os::elapsedTime(); | |
5935 bool non_young = true; | |
5936 | |
5937 HeapRegion* cur = cs_head; | |
5938 int age_bound = -1; | |
5939 size_t rs_lengths = 0; | |
5940 | |
5941 while (cur != NULL) { | |
2361 | 5942 assert(!is_on_master_free_list(cur), "sanity"); |
342 | 5943 if (non_young) { |
5944 if (cur->is_young()) { | |
5945 double end_sec = os::elapsedTime(); | |
5946 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
5947 non_young_time_ms += elapsed_ms; | |
5948 | |
5949 start_sec = os::elapsedTime(); | |
5950 non_young = false; | |
5951 } | |
5952 } else { | |
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
5953 if (!cur->is_young()) { |
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
5954 double end_sec = os::elapsedTime(); |
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
5955 double elapsed_ms = (end_sec - start_sec) * 1000.0; |
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
5956 young_time_ms += elapsed_ms; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
5957 |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
5958 start_sec = os::elapsedTime(); |
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
5959 non_young = true; |
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|
5960 } |
342 | 5961 } |
5962 | |
17755
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tschatzl
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diff
changeset
|
5963 rs_lengths += cur->rem_set()->occupied_locked(); |
342 | 5964 |
5965 HeapRegion* next = cur->next_in_collection_set(); | |
5966 assert(cur->in_collection_set(), "bad CS"); | |
5967 cur->set_next_in_collection_set(NULL); | |
5968 cur->set_in_collection_set(false); | |
5969 | |
5970 if (cur->is_young()) { | |
5971 int index = cur->young_index_in_cset(); | |
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7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
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|
5972 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
|
5973 assert((uint) index < policy->young_cset_region_length(), "invariant"); |
342 | 5974 size_t words_survived = _surviving_young_words[index]; |
5975 cur->record_surv_words_in_group(words_survived); | |
1394
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|
5976 |
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
5977 // At this point the we have 'popped' cur from the collection set |
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
5978 // (linked via next_in_collection_set()) but it is still in the |
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
5979 // young list (linked via next_young_region()). Clear the |
1316cec51b4d
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|
5980 // _next_young_region field. |
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|
5981 cur->set_next_young_region(NULL); |
342 | 5982 } else { |
5983 int index = cur->young_index_in_cset(); | |
4090
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|
5984 assert(index == -1, "invariant"); |
342 | 5985 } |
5986 | |
5987 assert( (cur->is_young() && cur->young_index_in_cset() > -1) || | |
5988 (!cur->is_young() && cur->young_index_in_cset() == -1), | |
5989 "invariant" ); | |
5990 | |
5991 if (!cur->evacuation_failed()) { | |
4097
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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diff
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|
5992 MemRegion used_mr = cur->used_region(); |
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7112743: G1: Reduce overhead of marking closure during evacuation pauses
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|
5993 |
342 | 5994 // And the region is empty. |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
5995 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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diff
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|
5996 pre_used += cur->used(); |
17755
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8027295: Free CSet takes ~50% of young pause time
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diff
changeset
|
5997 free_region(cur, &local_free_list, false /* par */, true /* locked */); |
342 | 5998 } else { |
5999 cur->uninstall_surv_rate_group(); | |
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|
6000 if (cur->is_young()) { |
342 | 6001 cur->set_young_index_in_cset(-1); |
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|
6002 } |
342 | 6003 cur->set_not_young(); |
6004 cur->set_evacuation_failed(false); | |
4072 | 6005 // The region is now considered to be old. |
6006 _old_set.add(cur); | |
10405 | 6007 evacuation_info.increment_collectionset_used_after(cur->used()); |
342 | 6008 } |
6009 cur = next; | |
6010 } | |
6011 | |
10405 | 6012 evacuation_info.set_regions_freed(local_free_list.length()); |
342 | 6013 policy->record_max_rs_lengths(rs_lengths); |
6014 policy->cset_regions_freed(); | |
6015 | |
6016 double end_sec = os::elapsedTime(); | |
6017 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
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diff
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|
6018 |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
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diff
changeset
|
6019 if (non_young) { |
342 | 6020 non_young_time_ms += elapsed_ms; |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
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4095
diff
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|
6021 } else { |
342 | 6022 young_time_ms += elapsed_ms; |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
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4095
diff
changeset
|
6023 } |
342 | 6024 |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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17727
diff
changeset
|
6025 prepend_to_freelist(&local_free_list); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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17727
diff
changeset
|
6026 decrement_summary_bytes(pre_used); |
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
|
6027 policy->phase_times()->record_young_free_cset_time_ms(young_time_ms); |
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
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6188
diff
changeset
|
6028 policy->phase_times()->record_non_young_free_cset_time_ms(non_young_time_ms); |
342 | 6029 } |
6030 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
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|
6031 // This routine is similar to the above but does not record |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
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|
6032 // any policy statistics or update free lists; we are abandoning |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
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|
6033 // the current incremental collection set in preparation of a |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
changeset
|
6034 // full collection. After the full GC we will start to build up |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
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|
6035 // the incremental collection set again. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
changeset
|
6036 // This is only called when we're doing a full collection |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
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|
6037 // and is immediately followed by the tearing down of the young list. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
changeset
|
6038 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
changeset
|
6039 void G1CollectedHeap::abandon_collection_set(HeapRegion* cs_head) { |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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diff
changeset
|
6040 HeapRegion* cur = cs_head; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
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|
6041 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
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|
6042 while (cur != NULL) { |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
changeset
|
6043 HeapRegion* next = cur->next_in_collection_set(); |
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diff
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|
6044 assert(cur->in_collection_set(), "bad CS"); |
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|
6045 cur->set_next_in_collection_set(NULL); |
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
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|
6046 cur->set_in_collection_set(false); |
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6047 cur->set_young_index_in_cset(-1); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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1391
diff
changeset
|
6048 cur = next; |
1316cec51b4d
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|
6049 } |
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|
6050 } |
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|
6051 |
2152 | 6052 void G1CollectedHeap::set_free_regions_coming() { |
6053 if (G1ConcRegionFreeingVerbose) { | |
6054 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
6055 "setting free regions coming"); | |
6056 } | |
6057 | |
6058 assert(!free_regions_coming(), "pre-condition"); | |
6059 _free_regions_coming = true; | |
342 | 6060 } |
6061 | |
2152 | 6062 void G1CollectedHeap::reset_free_regions_coming() { |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
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4836
diff
changeset
|
6063 assert(free_regions_coming(), "pre-condition"); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
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diff
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|
6064 |
2152 | 6065 { |
6066 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
6067 _free_regions_coming = false; | |
6068 SecondaryFreeList_lock->notify_all(); | |
6069 } | |
6070 | |
6071 if (G1ConcRegionFreeingVerbose) { | |
6072 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
6073 "reset free regions coming"); | |
342 | 6074 } |
6075 } | |
6076 | |
2152 | 6077 void G1CollectedHeap::wait_while_free_regions_coming() { |
6078 // Most of the time we won't have to wait, so let's do a quick test | |
6079 // first before we take the lock. | |
6080 if (!free_regions_coming()) { | |
6081 return; | |
6082 } | |
6083 | |
6084 if (G1ConcRegionFreeingVerbose) { | |
6085 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
6086 "waiting for free regions"); | |
342 | 6087 } |
6088 | |
6089 { | |
2152 | 6090 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
6091 while (free_regions_coming()) { | |
6092 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
342 | 6093 } |
2152 | 6094 } |
6095 | |
6096 if (G1ConcRegionFreeingVerbose) { | |
6097 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
6098 "done waiting for free regions"); | |
6099 } | |
342 | 6100 } |
6101 | |
6102 void G1CollectedHeap::set_region_short_lived_locked(HeapRegion* hr) { | |
6103 assert(heap_lock_held_for_gc(), | |
6104 "the heap lock should already be held by or for this thread"); | |
6105 _young_list->push_region(hr); | |
6106 } | |
6107 | |
6108 class NoYoungRegionsClosure: public HeapRegionClosure { | |
6109 private: | |
6110 bool _success; | |
6111 public: | |
6112 NoYoungRegionsClosure() : _success(true) { } | |
6113 bool doHeapRegion(HeapRegion* r) { | |
6114 if (r->is_young()) { | |
6115 gclog_or_tty->print_cr("Region ["PTR_FORMAT", "PTR_FORMAT") tagged as young", | |
6116 r->bottom(), r->end()); | |
6117 _success = false; | |
6118 } | |
6119 return false; | |
6120 } | |
6121 bool success() { return _success; } | |
6122 }; | |
6123 | |
1394
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|
6124 bool G1CollectedHeap::check_young_list_empty(bool check_heap, bool check_sample) { |
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|
6125 bool ret = _young_list->check_list_empty(check_sample); |
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|
6126 |
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|
6127 if (check_heap) { |
342 | 6128 NoYoungRegionsClosure closure; |
6129 heap_region_iterate(&closure); | |
6130 ret = ret && closure.success(); | |
6131 } | |
6132 | |
6133 return ret; | |
6134 } | |
6135 | |
4072 | 6136 class TearDownRegionSetsClosure : public HeapRegionClosure { |
6137 private: | |
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58fc1b1523dc
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brutisso
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|
6138 HeapRegionSet *_old_set; |
2152 | 6139 |
342 | 6140 public: |
17736
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|
6141 TearDownRegionSetsClosure(HeapRegionSet* old_set) : _old_set(old_set) { } |
2152 | 6142 |
342 | 6143 bool doHeapRegion(HeapRegion* r) { |
4072 | 6144 if (r->is_empty()) { |
6145 // We ignore empty regions, we'll empty the free list afterwards | |
6146 } else if (r->is_young()) { | |
6147 // We ignore young regions, we'll empty the young list afterwards | |
6148 } else if (r->isHumongous()) { | |
6149 // We ignore humongous regions, we're not tearing down the | |
6150 // humongous region set | |
342 | 6151 } else { |
4072 | 6152 // The rest should be old |
6153 _old_set->remove(r); | |
342 | 6154 } |
6155 return false; | |
6156 } | |
6157 | |
4072 | 6158 ~TearDownRegionSetsClosure() { |
6159 assert(_old_set->is_empty(), "post-condition"); | |
2152 | 6160 } |
342 | 6161 }; |
6162 | |
4072 | 6163 void G1CollectedHeap::tear_down_region_sets(bool free_list_only) { |
6164 assert_at_safepoint(true /* should_be_vm_thread */); | |
6165 | |
6166 if (!free_list_only) { | |
6167 TearDownRegionSetsClosure cl(&_old_set); | |
6168 heap_region_iterate(&cl); | |
6169 | |
17764 | 6170 // Note that emptying the _young_list is postponed and instead done as |
6171 // the first step when rebuilding the regions sets again. The reason for | |
6172 // this is that during a full GC string deduplication needs to know if | |
6173 // a collected region was young or old when the full GC was initiated. | |
4072 | 6174 } |
6175 _free_list.remove_all(); | |
6176 } | |
6177 | |
6178 class RebuildRegionSetsClosure : public HeapRegionClosure { | |
6179 private: | |
6180 bool _free_list_only; | |
17736
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6181 HeapRegionSet* _old_set; |
4072 | 6182 FreeRegionList* _free_list; |
6183 size_t _total_used; | |
6184 | |
6185 public: | |
6186 RebuildRegionSetsClosure(bool free_list_only, | |
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6187 HeapRegionSet* old_set, FreeRegionList* free_list) : |
4072 | 6188 _free_list_only(free_list_only), |
6189 _old_set(old_set), _free_list(free_list), _total_used(0) { | |
6190 assert(_free_list->is_empty(), "pre-condition"); | |
6191 if (!free_list_only) { | |
6192 assert(_old_set->is_empty(), "pre-condition"); | |
6193 } | |
6194 } | |
6195 | |
6196 bool doHeapRegion(HeapRegion* r) { | |
6197 if (r->continuesHumongous()) { | |
6198 return false; | |
6199 } | |
6200 | |
6201 if (r->is_empty()) { | |
6202 // Add free regions to the free list | |
6203 _free_list->add_as_tail(r); | |
6204 } else if (!_free_list_only) { | |
6205 assert(!r->is_young(), "we should not come across young regions"); | |
6206 | |
6207 if (r->isHumongous()) { | |
6208 // We ignore humongous regions, we left the humongous set unchanged | |
6209 } else { | |
6210 // The rest should be old, add them to the old set | |
6211 _old_set->add(r); | |
6212 } | |
6213 _total_used += r->used(); | |
6214 } | |
6215 | |
6216 return false; | |
6217 } | |
6218 | |
6219 size_t total_used() { | |
6220 return _total_used; | |
6221 } | |
6222 }; | |
6223 | |
6224 void G1CollectedHeap::rebuild_region_sets(bool free_list_only) { | |
6225 assert_at_safepoint(true /* should_be_vm_thread */); | |
6226 | |
17764 | 6227 if (!free_list_only) { |
6228 _young_list->empty_list(); | |
6229 } | |
6230 | |
4072 | 6231 RebuildRegionSetsClosure cl(free_list_only, &_old_set, &_free_list); |
6232 heap_region_iterate(&cl); | |
6233 | |
6234 if (!free_list_only) { | |
6235 _summary_bytes_used = cl.total_used(); | |
6236 } | |
6237 assert(_summary_bytes_used == recalculate_used(), | |
6238 err_msg("inconsistent _summary_bytes_used, " | |
6239 "value: "SIZE_FORMAT" recalculated: "SIZE_FORMAT, | |
6240 _summary_bytes_used, recalculate_used())); | |
342 | 6241 } |
6242 | |
6243 void G1CollectedHeap::set_refine_cte_cl_concurrency(bool concurrent) { | |
6244 _refine_cte_cl->set_concurrent(concurrent); | |
6245 } | |
6246 | |
6247 bool G1CollectedHeap::is_in_closed_subset(const void* p) const { | |
6248 HeapRegion* hr = heap_region_containing(p); | |
6249 if (hr == NULL) { | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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6250 return false; |
342 | 6251 } else { |
6252 return hr->is_in(p); | |
6253 } | |
6254 } | |
2152 | 6255 |
3830
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6256 // Methods for the mutator alloc region |
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6257 |
2433
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6258 HeapRegion* G1CollectedHeap::new_mutator_alloc_region(size_t word_size, |
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|
6259 bool force) { |
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|
6260 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
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|
6261 assert(!force || g1_policy()->can_expand_young_list(), |
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|
6262 "if force is true we should be able to expand the young list"); |
3778
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7049999: G1: Make the G1PrintHeapRegions output consistent and complete
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|
6263 bool young_list_full = g1_policy()->is_young_list_full(); |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
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|
6264 if (force || !young_list_full) { |
2433
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7023069: G1: Introduce symmetric locking in the slow allocation path
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|
6265 HeapRegion* new_alloc_region = new_region(word_size, |
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
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|
6266 false /* is_old */, |
2433
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7023069: G1: Introduce symmetric locking in the slow allocation path
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changeset
|
6267 false /* do_expand */); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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|
6268 if (new_alloc_region != NULL) { |
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7023069: G1: Introduce symmetric locking in the slow allocation path
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|
6269 set_region_short_lived_locked(new_alloc_region); |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
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diff
changeset
|
6270 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Eden, young_list_full); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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|
6271 return new_alloc_region; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
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diff
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|
6272 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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diff
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|
6273 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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diff
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|
6274 return NULL; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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diff
changeset
|
6275 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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diff
changeset
|
6276 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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|
6277 void G1CollectedHeap::retire_mutator_alloc_region(HeapRegion* alloc_region, |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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|
6278 size_t allocated_bytes) { |
abdfc822206f
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|
6279 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
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changeset
|
6280 assert(alloc_region->is_young(), "all mutator alloc regions should be young"); |
abdfc822206f
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|
6281 |
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changeset
|
6282 g1_policy()->add_region_to_incremental_cset_lhs(alloc_region); |
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7023069: G1: Introduce symmetric locking in the slow allocation path
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|
6283 _summary_bytes_used += allocated_bytes; |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
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parents:
3777
diff
changeset
|
6284 _hr_printer.retire(alloc_region); |
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6285 // We update the eden sizes here, when the region is retired, |
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
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3979
diff
changeset
|
6286 // 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
|
6287 // used space has been recored in _summary_bytes_used. |
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6288 g1mm()->update_eden_size(); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
2432
diff
changeset
|
6289 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
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diff
changeset
|
6290 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
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diff
changeset
|
6291 HeapRegion* MutatorAllocRegion::allocate_new_region(size_t word_size, |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
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|
6292 bool force) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6293 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
|
6294 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6295 |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6296 void G1CollectedHeap::set_par_threads() { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6297 // 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
|
6298 // in the workgroup. |
4711 | 6299 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
|
6300 uint n_workers = workers()->active_workers(); |
4711 | 6301 assert(UseDynamicNumberOfGCThreads || |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6302 n_workers == workers()->total_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6303 "Otherwise should be using the total number of workers"); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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4090
diff
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|
6304 if (n_workers == 0) { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6305 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
|
6306 n_workers = ParallelGCThreads; |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6307 workers()->set_active_workers(n_workers); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6308 } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6309 set_par_threads(n_workers); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6310 } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6311 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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2432
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|
6312 void MutatorAllocRegion::retire_region(HeapRegion* alloc_region, |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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2432
diff
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|
6313 size_t allocated_bytes) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
2432
diff
changeset
|
6314 _g1h->retire_mutator_alloc_region(alloc_region, allocated_bytes); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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2432
diff
changeset
|
6315 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
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2432
diff
changeset
|
6316 |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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diff
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|
6317 // Methods for the GC alloc regions |
f44782f04dd4
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|
6318 |
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7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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|
6319 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
|
6320 uint count, |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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diff
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|
6321 GCAllocPurpose ap) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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diff
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|
6322 assert(FreeList_lock->owned_by_self(), "pre-condition"); |
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|
6323 |
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7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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|
6324 if (count < g1_policy()->max_regions(ap)) { |
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
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17759
diff
changeset
|
6325 bool survivor = (ap == GCAllocForSurvived); |
3830
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3824
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|
6326 HeapRegion* new_alloc_region = new_region(word_size, |
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
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17759
diff
changeset
|
6327 !survivor, |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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diff
changeset
|
6328 true /* do_expand */); |
f44782f04dd4
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diff
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|
6329 if (new_alloc_region != NULL) { |
f44782f04dd4
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diff
changeset
|
6330 // We really only need to do this for old regions given that we |
f44782f04dd4
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diff
changeset
|
6331 // should never scan survivors. But it doesn't hurt to do it |
f44782f04dd4
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diff
changeset
|
6332 // for survivors too. |
f44782f04dd4
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changeset
|
6333 new_alloc_region->set_saved_mark(); |
17773
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8036025: Sort the freelist in order to shrink the heap
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17759
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|
6334 if (survivor) { |
3830
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|
6335 new_alloc_region->set_survivor(); |
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7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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changeset
|
6336 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Survivor); |
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|
6337 } else { |
f44782f04dd4
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|
6338 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Old); |
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diff
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|
6339 } |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
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4785
diff
changeset
|
6340 bool during_im = g1_policy()->during_initial_mark_pause(); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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4785
diff
changeset
|
6341 new_alloc_region->note_start_of_copying(during_im); |
3830
f44782f04dd4
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diff
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|
6342 return new_alloc_region; |
f44782f04dd4
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diff
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|
6343 } else { |
f44782f04dd4
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diff
changeset
|
6344 g1_policy()->note_alloc_region_limit_reached(ap); |
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3824
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|
6345 } |
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|
6346 } |
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diff
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|
6347 return NULL; |
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diff
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|
6348 } |
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|
6349 |
f44782f04dd4
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6350 void G1CollectedHeap::retire_gc_alloc_region(HeapRegion* alloc_region, |
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6351 size_t allocated_bytes, |
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6352 GCAllocPurpose ap) { |
4787
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6353 bool during_im = g1_policy()->during_initial_mark_pause(); |
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6354 alloc_region->note_end_of_copying(during_im); |
3830
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6355 g1_policy()->record_bytes_copied_during_gc(allocated_bytes); |
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6356 if (ap == GCAllocForSurvived) { |
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6357 young_list()->add_survivor_region(alloc_region); |
4072 | 6358 } else { |
6359 _old_set.add(alloc_region); | |
3830
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6360 } |
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6361 _hr_printer.retire(alloc_region); |
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6362 } |
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6363 |
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6364 HeapRegion* SurvivorGCAllocRegion::allocate_new_region(size_t word_size, |
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6365 bool force) { |
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6366 assert(!force, "not supported for GC alloc regions"); |
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6367 return _g1h->new_gc_alloc_region(word_size, count(), GCAllocForSurvived); |
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6368 } |
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6369 |
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6370 void SurvivorGCAllocRegion::retire_region(HeapRegion* alloc_region, |
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6371 size_t allocated_bytes) { |
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6372 _g1h->retire_gc_alloc_region(alloc_region, allocated_bytes, |
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6373 GCAllocForSurvived); |
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6374 } |
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6375 |
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6376 HeapRegion* OldGCAllocRegion::allocate_new_region(size_t word_size, |
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6377 bool force) { |
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6378 assert(!force, "not supported for GC alloc regions"); |
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6379 return _g1h->new_gc_alloc_region(word_size, count(), GCAllocForTenured); |
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6380 } |
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6381 |
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6382 void OldGCAllocRegion::retire_region(HeapRegion* alloc_region, |
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6383 size_t allocated_bytes) { |
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6384 _g1h->retire_gc_alloc_region(alloc_region, allocated_bytes, |
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6385 GCAllocForTenured); |
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6386 } |
2433
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6387 // Heap region set verification |
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6388 |
2152 | 6389 class VerifyRegionListsClosure : public HeapRegionClosure { |
6390 private: | |
17736
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6391 HeapRegionSet* _old_set; |
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6392 HeapRegionSet* _humongous_set; |
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6393 FreeRegionList* _free_list; |
2152 | 6394 |
6395 public: | |
17736
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6396 HeapRegionSetCount _old_count; |
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6397 HeapRegionSetCount _humongous_count; |
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6398 HeapRegionSetCount _free_count; |
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6399 |
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6400 VerifyRegionListsClosure(HeapRegionSet* old_set, |
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6401 HeapRegionSet* humongous_set, |
2152 | 6402 FreeRegionList* free_list) : |
17736
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6403 _old_set(old_set), _humongous_set(humongous_set), _free_list(free_list), |
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6404 _old_count(), _humongous_count(), _free_count(){ } |
2152 | 6405 |
6406 bool doHeapRegion(HeapRegion* hr) { | |
6407 if (hr->continuesHumongous()) { | |
6408 return false; | |
6409 } | |
6410 | |
6411 if (hr->is_young()) { | |
6412 // TODO | |
6413 } else if (hr->startsHumongous()) { | |
17736
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6414 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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6415 _humongous_count.increment(1u, hr->capacity()); |
2152 | 6416 } else if (hr->is_empty()) { |
17736
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6417 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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6418 _free_count.increment(1u, hr->capacity()); |
4072 | 6419 } else { |
17736
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6420 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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6421 _old_count.increment(1u, hr->capacity()); |
2152 | 6422 } |
6423 return false; | |
6424 } | |
17736
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6425 |
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6426 void verify_counts(HeapRegionSet* old_set, HeapRegionSet* humongous_set, FreeRegionList* free_list) { |
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6427 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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6428 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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6429 old_set->total_capacity_bytes(), _old_count.capacity())); |
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6430 |
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6431 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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6432 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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6433 humongous_set->total_capacity_bytes(), _humongous_count.capacity())); |
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6434 |
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6435 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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6436 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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6437 free_list->total_capacity_bytes(), _free_count.capacity())); |
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6438 } |
2152 | 6439 }; |
6440 | |
6010
720b6a76dd9d
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|
6441 HeapRegion* G1CollectedHeap::new_heap_region(uint hrs_index, |
3766 | 6442 HeapWord* bottom) { |
6443 HeapWord* end = bottom + HeapRegion::GrainWords; | |
6444 MemRegion mr(bottom, end); | |
6445 assert(_g1_reserved.contains(mr), "invariant"); | |
6446 // This might return NULL if the allocation fails | |
6754
8fbf05030e24
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6447 return new HeapRegion(hrs_index, _bot_shared, mr); |
3766 | 6448 } |
6449 | |
2152 | 6450 void G1CollectedHeap::verify_region_sets() { |
6451 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); | |
6452 | |
6453 // First, check the explicit lists. | |
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6454 _free_list.verify_list(); |
2152 | 6455 { |
6456 // Given that a concurrent operation might be adding regions to | |
6457 // the secondary free list we have to take the lock before | |
6458 // verifying it. | |
6459 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
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6460 _secondary_free_list.verify_list(); |
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6461 } |
2152 | 6462 |
6463 // If a concurrent region freeing operation is in progress it will | |
6464 // be difficult to correctly attributed any free regions we come | |
6465 // across to the correct free list given that they might belong to | |
6466 // one of several (free_list, secondary_free_list, any local lists, | |
6467 // etc.). So, if that's the case we will skip the rest of the | |
6468 // verification operation. Alternatively, waiting for the concurrent | |
6469 // operation to complete will have a non-trivial effect on the GC's | |
6470 // operation (no concurrent operation will last longer than the | |
6471 // interval between two calls to verification) and it might hide | |
6472 // any issues that we would like to catch during testing. | |
6473 if (free_regions_coming()) { | |
6474 return; | |
6475 } | |
6476 | |
2361 | 6477 // Make sure we append the secondary_free_list on the free_list so |
6478 // that all free regions we will come across can be safely | |
6479 // attributed to the free_list. | |
6480 append_secondary_free_list_if_not_empty_with_lock(); | |
2152 | 6481 |
6482 // Finally, make sure that the region accounting in the lists is | |
6483 // consistent with what we see in the heap. | |
6484 | |
4072 | 6485 VerifyRegionListsClosure cl(&_old_set, &_humongous_set, &_free_list); |
2152 | 6486 heap_region_iterate(&cl); |
17736
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6487 cl.verify_counts(&_old_set, &_humongous_set, &_free_list); |
342 | 6488 } |
12080 | 6489 |
6490 // Optimized nmethod scanning | |
6491 | |
6492 class RegisterNMethodOopClosure: public OopClosure { | |
6493 G1CollectedHeap* _g1h; | |
6494 nmethod* _nm; | |
6495 | |
6496 template <class T> void do_oop_work(T* p) { | |
6497 T heap_oop = oopDesc::load_heap_oop(p); | |
6498 if (!oopDesc::is_null(heap_oop)) { | |
6499 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
6500 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
13062
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6501 assert(!hr->continuesHumongous(), |
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6502 err_msg("trying to add code root "PTR_FORMAT" in continuation of humongous region "HR_FORMAT |
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6503 " starting at "HR_FORMAT, |
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6504 _nm, HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()))); |
12080 | 6505 |
6506 // HeapRegion::add_strong_code_root() avoids adding duplicate | |
6507 // entries but having duplicates is OK since we "mark" nmethods | |
6508 // as visited when we scan the strong code root lists during the GC. | |
6509 hr->add_strong_code_root(_nm); | |
13062
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6510 assert(hr->rem_set()->strong_code_roots_list_contains(_nm), |
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6511 err_msg("failed to add code root "PTR_FORMAT" to remembered set of region "HR_FORMAT, |
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|
6512 _nm, HR_FORMAT_PARAMS(hr))); |
12080 | 6513 } |
6514 } | |
6515 | |
6516 public: | |
6517 RegisterNMethodOopClosure(G1CollectedHeap* g1h, nmethod* nm) : | |
6518 _g1h(g1h), _nm(nm) {} | |
6519 | |
6520 void do_oop(oop* p) { do_oop_work(p); } | |
6521 void do_oop(narrowOop* p) { do_oop_work(p); } | |
6522 }; | |
6523 | |
6524 class UnregisterNMethodOopClosure: public OopClosure { | |
6525 G1CollectedHeap* _g1h; | |
6526 nmethod* _nm; | |
6527 | |
6528 template <class T> void do_oop_work(T* p) { | |
6529 T heap_oop = oopDesc::load_heap_oop(p); | |
6530 if (!oopDesc::is_null(heap_oop)) { | |
6531 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
6532 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
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6533 assert(!hr->continuesHumongous(), |
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6534 err_msg("trying to remove code root "PTR_FORMAT" in continuation of humongous region "HR_FORMAT |
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6535 " starting at "HR_FORMAT, |
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|
6536 _nm, HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()))); |
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6537 |
12080 | 6538 hr->remove_strong_code_root(_nm); |
13062
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6539 assert(!hr->rem_set()->strong_code_roots_list_contains(_nm), |
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6540 err_msg("failed to remove code root "PTR_FORMAT" of region "HR_FORMAT, |
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6541 _nm, HR_FORMAT_PARAMS(hr))); |
12080 | 6542 } |
6543 } | |
6544 | |
6545 public: | |
6546 UnregisterNMethodOopClosure(G1CollectedHeap* g1h, nmethod* nm) : | |
6547 _g1h(g1h), _nm(nm) {} | |
6548 | |
6549 void do_oop(oop* p) { do_oop_work(p); } | |
6550 void do_oop(narrowOop* p) { do_oop_work(p); } | |
6551 }; | |
6552 | |
6553 void G1CollectedHeap::register_nmethod(nmethod* nm) { | |
6554 CollectedHeap::register_nmethod(nm); | |
6555 | |
6556 guarantee(nm != NULL, "sanity"); | |
6557 RegisterNMethodOopClosure reg_cl(this, nm); | |
6558 nm->oops_do(®_cl); | |
6559 } | |
6560 | |
6561 void G1CollectedHeap::unregister_nmethod(nmethod* nm) { | |
6562 CollectedHeap::unregister_nmethod(nm); | |
6563 | |
6564 guarantee(nm != NULL, "sanity"); | |
6565 UnregisterNMethodOopClosure reg_cl(this, nm); | |
6566 nm->oops_do(®_cl, true); | |
6567 } | |
6568 | |
6569 class MigrateCodeRootsHeapRegionClosure: public HeapRegionClosure { | |
6570 public: | |
6571 bool doHeapRegion(HeapRegion *hr) { | |
13062
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6572 assert(!hr->isHumongous(), |
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6573 err_msg("humongous region "HR_FORMAT" should not have been added to collection set", |
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6574 HR_FORMAT_PARAMS(hr))); |
12080 | 6575 hr->migrate_strong_code_roots(); |
6576 return false; | |
6577 } | |
6578 }; | |
6579 | |
6580 void G1CollectedHeap::migrate_strong_code_roots() { | |
6581 MigrateCodeRootsHeapRegionClosure cl; | |
6582 double migrate_start = os::elapsedTime(); | |
6583 collection_set_iterate(&cl); | |
6584 double migration_time_ms = (os::elapsedTime() - migrate_start) * 1000.0; | |
6585 g1_policy()->phase_times()->record_strong_code_root_migration_time(migration_time_ms); | |
6586 } | |
6587 | |
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6588 void G1CollectedHeap::purge_code_root_memory() { |
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6589 double purge_start = os::elapsedTime(); |
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6590 G1CodeRootSet::purge_chunks(G1CodeRootsChunkCacheKeepPercent); |
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6591 double purge_time_ms = (os::elapsedTime() - purge_start) * 1000.0; |
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6592 g1_policy()->phase_times()->record_strong_code_root_purge_time(purge_time_ms); |
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6593 } |
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6594 |
12080 | 6595 // Mark all the code roots that point into regions *not* in the |
6596 // collection set. | |
6597 // | |
6598 // Note we do not want to use a "marking" CodeBlobToOopClosure while | |
6599 // walking the the code roots lists of regions not in the collection | |
6600 // set. Suppose we have an nmethod (M) that points to objects in two | |
6601 // separate regions - one in the collection set (R1) and one not (R2). | |
6602 // Using a "marking" CodeBlobToOopClosure here would result in "marking" | |
6603 // nmethod M when walking the code roots for R1. When we come to scan | |
6604 // the code roots for R2, we would see that M is already marked and it | |
6605 // would be skipped and the objects in R2 that are referenced from M | |
6606 // would not be evacuated. | |
6607 | |
6608 class MarkStrongCodeRootCodeBlobClosure: public CodeBlobClosure { | |
6609 | |
6610 class MarkStrongCodeRootOopClosure: public OopClosure { | |
6611 ConcurrentMark* _cm; | |
6612 HeapRegion* _hr; | |
6613 uint _worker_id; | |
6614 | |
6615 template <class T> void do_oop_work(T* p) { | |
6616 T heap_oop = oopDesc::load_heap_oop(p); | |
6617 if (!oopDesc::is_null(heap_oop)) { | |
6618 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
6619 // Only mark objects in the region (which is assumed | |
6620 // to be not in the collection set). | |
6621 if (_hr->is_in(obj)) { | |
6622 _cm->grayRoot(obj, (size_t) obj->size(), _worker_id); | |
6623 } | |
6624 } | |
6625 } | |
6626 | |
6627 public: | |
6628 MarkStrongCodeRootOopClosure(ConcurrentMark* cm, HeapRegion* hr, uint worker_id) : | |
6629 _cm(cm), _hr(hr), _worker_id(worker_id) { | |
6630 assert(!_hr->in_collection_set(), "sanity"); | |
6631 } | |
6632 | |
6633 void do_oop(narrowOop* p) { do_oop_work(p); } | |
6634 void do_oop(oop* p) { do_oop_work(p); } | |
6635 }; | |
6636 | |
6637 MarkStrongCodeRootOopClosure _oop_cl; | |
6638 | |
6639 public: | |
6640 MarkStrongCodeRootCodeBlobClosure(ConcurrentMark* cm, HeapRegion* hr, uint worker_id): | |
6641 _oop_cl(cm, hr, worker_id) {} | |
6642 | |
6643 void do_code_blob(CodeBlob* cb) { | |
6644 nmethod* nm = (cb == NULL) ? NULL : cb->as_nmethod_or_null(); | |
6645 if (nm != NULL) { | |
6646 nm->oops_do(&_oop_cl); | |
6647 } | |
6648 } | |
6649 }; | |
6650 | |
6651 class MarkStrongCodeRootsHRClosure: public HeapRegionClosure { | |
6652 G1CollectedHeap* _g1h; | |
6653 uint _worker_id; | |
6654 | |
6655 public: | |
6656 MarkStrongCodeRootsHRClosure(G1CollectedHeap* g1h, uint worker_id) : | |
6657 _g1h(g1h), _worker_id(worker_id) {} | |
6658 | |
6659 bool doHeapRegion(HeapRegion *hr) { | |
6660 HeapRegionRemSet* hrrs = hr->rem_set(); | |
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6661 if (hr->continuesHumongous()) { |
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6662 // Code roots should never be attached to a continuation of a humongous region |
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6663 assert(hrrs->strong_code_roots_list_length() == 0, |
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6664 err_msg("code roots should never be attached to continuations of humongous region "HR_FORMAT |
17753
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6665 " starting at "HR_FORMAT", but has "SIZE_FORMAT, |
13062
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6666 HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()), |
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6667 hrrs->strong_code_roots_list_length())); |
12080 | 6668 return false; |
6669 } | |
6670 | |
6671 if (hr->in_collection_set()) { | |
6672 // Don't mark code roots into regions in the collection set here. | |
6673 // They will be marked when we scan them. | |
6674 return false; | |
6675 } | |
6676 | |
6677 MarkStrongCodeRootCodeBlobClosure cb_cl(_g1h->concurrent_mark(), hr, _worker_id); | |
6678 hr->strong_code_roots_do(&cb_cl); | |
6679 return false; | |
6680 } | |
6681 }; | |
6682 | |
6683 void G1CollectedHeap::mark_strong_code_roots(uint worker_id) { | |
6684 MarkStrongCodeRootsHRClosure cl(this, worker_id); | |
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6685 if (G1CollectedHeap::use_parallel_gc_threads()) { |
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6686 heap_region_par_iterate_chunked(&cl, |
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6687 worker_id, |
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6688 workers()->active_workers(), |
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6689 HeapRegion::ParMarkRootClaimValue); |
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6690 } else { |
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6691 heap_region_iterate(&cl); |
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6692 } |
12080 | 6693 } |
6694 | |
6695 class RebuildStrongCodeRootClosure: public CodeBlobClosure { | |
6696 G1CollectedHeap* _g1h; | |
6697 | |
6698 public: | |
6699 RebuildStrongCodeRootClosure(G1CollectedHeap* g1h) : | |
6700 _g1h(g1h) {} | |
6701 | |
6702 void do_code_blob(CodeBlob* cb) { | |
6703 nmethod* nm = (cb != NULL) ? cb->as_nmethod_or_null() : NULL; | |
6704 if (nm == NULL) { | |
6705 return; | |
6706 } | |
6707 | |
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6708 if (ScavengeRootsInCode) { |
12080 | 6709 _g1h->register_nmethod(nm); |
6710 } | |
6711 } | |
6712 }; | |
6713 | |
6714 void G1CollectedHeap::rebuild_strong_code_roots() { | |
6715 RebuildStrongCodeRootClosure blob_cl(this); | |
6716 CodeCache::blobs_do(&blob_cl); | |
6717 } |