Mercurial > hg > graal-jvmci-8
annotate src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp @ 20522:d3fd73295885
8059466: Force young GC to initiate marking cycle when stat update is requested
Summary: Enable yc to be forced for stat update.
Reviewed-by: mgerdin, jcoomes
author | sjohanss |
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date | Mon, 06 Oct 2014 10:11:13 +0200 |
parents | 6948da6d7c13 |
children | e7d0505c8a30 |
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" |
20337 | 46 #include "gc_implementation/g1/g1RegionToSpaceMapper.hpp" |
1972 | 47 #include "gc_implementation/g1/g1RemSet.inline.hpp" |
17764 | 48 #include "gc_implementation/g1/g1StringDedup.hpp" |
10405 | 49 #include "gc_implementation/g1/g1YCTypes.hpp" |
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50 #include "gc_implementation/g1/heapRegion.inline.hpp" |
1972 | 51 #include "gc_implementation/g1/heapRegionRemSet.hpp" |
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52 #include "gc_implementation/g1/heapRegionSet.inline.hpp" |
1972 | 53 #include "gc_implementation/g1/vm_operations_g1.hpp" |
10405 | 54 #include "gc_implementation/shared/gcHeapSummary.hpp" |
55 #include "gc_implementation/shared/gcTimer.hpp" | |
56 #include "gc_implementation/shared/gcTrace.hpp" | |
57 #include "gc_implementation/shared/gcTraceTime.hpp" | |
1972 | 58 #include "gc_implementation/shared/isGCActiveMark.hpp" |
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59 #include "memory/allocation.hpp" |
1972 | 60 #include "memory/gcLocker.inline.hpp" |
61 #include "memory/generationSpec.hpp" | |
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62 #include "memory/iterator.hpp" |
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63 #include "memory/referenceProcessor.hpp" |
1972 | 64 #include "oops/oop.inline.hpp" |
65 #include "oops/oop.pcgc.inline.hpp" | |
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66 #include "runtime/orderAccess.inline.hpp" |
1972 | 67 #include "runtime/vmThread.hpp" |
342 | 68 |
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69 size_t G1CollectedHeap::_humongous_object_threshold_in_words = 0; |
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70 |
342 | 71 // turn it on so that the contents of the young list (scan-only / |
72 // to-be-collected) are printed at "strategic" points before / during | |
73 // / after the collection --- this is useful for debugging | |
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74 #define YOUNG_LIST_VERBOSE 0 |
342 | 75 // CURRENT STATUS |
76 // This file is under construction. Search for "FIXME". | |
77 | |
78 // INVARIANTS/NOTES | |
79 // | |
80 // All allocation activity covered by the G1CollectedHeap interface is | |
1973 | 81 // serialized by acquiring the HeapLock. This happens in mem_allocate |
82 // and allocate_new_tlab, which are the "entry" points to the | |
83 // allocation code from the rest of the JVM. (Note that this does not | |
84 // apply to TLAB allocation, which is not part of this interface: it | |
85 // is done by clients of this interface.) | |
342 | 86 |
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87 // Notes on implementation of parallelism in different tasks. |
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88 // |
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89 // G1ParVerifyTask uses heap_region_par_iterate_chunked() for parallelism. |
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90 // The number of GC workers is passed to heap_region_par_iterate_chunked(). |
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91 // It does use run_task() which sets _n_workers in the task. |
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92 // G1ParTask executes g1_process_roots() -> |
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93 // SharedHeap::process_roots() which calls eventually to |
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94 // CardTableModRefBS::par_non_clean_card_iterate_work() which uses |
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95 // SequentialSubTasksDone. SharedHeap::process_roots() also |
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96 // directly uses SubTasksDone (_process_strong_tasks field in SharedHeap). |
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97 // |
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98 |
342 | 99 // Local to this file. |
100 | |
101 class RefineCardTableEntryClosure: public CardTableEntryClosure { | |
102 bool _concurrent; | |
103 public: | |
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104 RefineCardTableEntryClosure() : _concurrent(true) { } |
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105 |
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106 bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
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107 bool oops_into_cset = G1CollectedHeap::heap()->g1_rem_set()->refine_card(card_ptr, worker_i, false); |
1705 | 108 // This path is executed by the concurrent refine or mutator threads, |
109 // concurrently, and so we do not care if card_ptr contains references | |
110 // that point into the collection set. | |
111 assert(!oops_into_cset, "should be"); | |
112 | |
20192 | 113 if (_concurrent && SuspendibleThreadSet::should_yield()) { |
342 | 114 // Caller will actually yield. |
115 return false; | |
116 } | |
117 // Otherwise, we finished successfully; return true. | |
118 return true; | |
119 } | |
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120 |
342 | 121 void set_concurrent(bool b) { _concurrent = b; } |
122 }; | |
123 | |
124 | |
125 class ClearLoggedCardTableEntryClosure: public CardTableEntryClosure { | |
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126 size_t _num_processed; |
342 | 127 CardTableModRefBS* _ctbs; |
128 int _histo[256]; | |
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129 |
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130 public: |
342 | 131 ClearLoggedCardTableEntryClosure() : |
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132 _num_processed(0), _ctbs(G1CollectedHeap::heap()->g1_barrier_set()) |
342 | 133 { |
134 for (int i = 0; i < 256; i++) _histo[i] = 0; | |
135 } | |
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136 |
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137 bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
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138 unsigned char* ujb = (unsigned char*)card_ptr; |
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139 int ind = (int)(*ujb); |
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140 _histo[ind]++; |
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141 |
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142 *card_ptr = (jbyte)CardTableModRefBS::clean_card_val(); |
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143 _num_processed++; |
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144 |
342 | 145 return true; |
146 } | |
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147 |
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148 size_t num_processed() { return _num_processed; } |
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149 |
342 | 150 void print_histo() { |
151 gclog_or_tty->print_cr("Card table value histogram:"); | |
152 for (int i = 0; i < 256; i++) { | |
153 if (_histo[i] != 0) { | |
154 gclog_or_tty->print_cr(" %d: %d", i, _histo[i]); | |
155 } | |
156 } | |
157 } | |
158 }; | |
159 | |
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160 class RedirtyLoggedCardTableEntryClosure : public CardTableEntryClosure { |
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161 private: |
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162 size_t _num_processed; |
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163 |
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164 public: |
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165 RedirtyLoggedCardTableEntryClosure() : CardTableEntryClosure(), _num_processed(0) { } |
12343 | 166 |
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167 bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
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168 *card_ptr = CardTableModRefBS::dirty_card_val(); |
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169 _num_processed++; |
342 | 170 return true; |
171 } | |
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172 |
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173 size_t num_processed() const { return _num_processed; } |
342 | 174 }; |
175 | |
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176 YoungList::YoungList(G1CollectedHeap* g1h) : |
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177 _g1h(g1h), _head(NULL), _length(0), _last_sampled_rs_lengths(0), |
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178 _survivor_head(NULL), _survivor_tail(NULL), _survivor_length(0) { |
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179 guarantee(check_list_empty(false), "just making sure..."); |
342 | 180 } |
181 | |
182 void YoungList::push_region(HeapRegion *hr) { | |
183 assert(!hr->is_young(), "should not already be young"); | |
184 assert(hr->get_next_young_region() == NULL, "cause it should!"); | |
185 | |
186 hr->set_next_young_region(_head); | |
187 _head = hr; | |
188 | |
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189 _g1h->g1_policy()->set_region_eden(hr, (int) _length); |
342 | 190 ++_length; |
191 } | |
192 | |
193 void YoungList::add_survivor_region(HeapRegion* hr) { | |
545 | 194 assert(hr->is_survivor(), "should be flagged as survivor region"); |
342 | 195 assert(hr->get_next_young_region() == NULL, "cause it should!"); |
196 | |
197 hr->set_next_young_region(_survivor_head); | |
198 if (_survivor_head == NULL) { | |
545 | 199 _survivor_tail = hr; |
342 | 200 } |
201 _survivor_head = hr; | |
202 ++_survivor_length; | |
203 } | |
204 | |
205 void YoungList::empty_list(HeapRegion* list) { | |
206 while (list != NULL) { | |
207 HeapRegion* next = list->get_next_young_region(); | |
208 list->set_next_young_region(NULL); | |
209 list->uninstall_surv_rate_group(); | |
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210 // This is called before a Full GC and all the non-empty / |
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211 // non-humongous regions at the end of the Full GC will end up as |
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212 // old anyway. |
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213 list->set_old(); |
342 | 214 list = next; |
215 } | |
216 } | |
217 | |
218 void YoungList::empty_list() { | |
219 assert(check_list_well_formed(), "young list should be well formed"); | |
220 | |
221 empty_list(_head); | |
222 _head = NULL; | |
223 _length = 0; | |
224 | |
225 empty_list(_survivor_head); | |
226 _survivor_head = NULL; | |
545 | 227 _survivor_tail = NULL; |
342 | 228 _survivor_length = 0; |
229 | |
230 _last_sampled_rs_lengths = 0; | |
231 | |
232 assert(check_list_empty(false), "just making sure..."); | |
233 } | |
234 | |
235 bool YoungList::check_list_well_formed() { | |
236 bool ret = true; | |
237 | |
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238 uint length = 0; |
342 | 239 HeapRegion* curr = _head; |
240 HeapRegion* last = NULL; | |
241 while (curr != NULL) { | |
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242 if (!curr->is_young()) { |
342 | 243 gclog_or_tty->print_cr("### YOUNG REGION "PTR_FORMAT"-"PTR_FORMAT" " |
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244 "incorrectly tagged (y: %d, surv: %d)", |
342 | 245 curr->bottom(), curr->end(), |
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246 curr->is_young(), curr->is_survivor()); |
342 | 247 ret = false; |
248 } | |
249 ++length; | |
250 last = curr; | |
251 curr = curr->get_next_young_region(); | |
252 } | |
253 ret = ret && (length == _length); | |
254 | |
255 if (!ret) { | |
256 gclog_or_tty->print_cr("### YOUNG LIST seems not well formed!"); | |
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257 gclog_or_tty->print_cr("### list has %u entries, _length is %u", |
342 | 258 length, _length); |
259 } | |
260 | |
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261 return ret; |
342 | 262 } |
263 | |
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264 bool YoungList::check_list_empty(bool check_sample) { |
342 | 265 bool ret = true; |
266 | |
267 if (_length != 0) { | |
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268 gclog_or_tty->print_cr("### YOUNG LIST should have 0 length, not %u", |
342 | 269 _length); |
270 ret = false; | |
271 } | |
272 if (check_sample && _last_sampled_rs_lengths != 0) { | |
273 gclog_or_tty->print_cr("### YOUNG LIST has non-zero last sampled RS lengths"); | |
274 ret = false; | |
275 } | |
276 if (_head != NULL) { | |
277 gclog_or_tty->print_cr("### YOUNG LIST does not have a NULL head"); | |
278 ret = false; | |
279 } | |
280 if (!ret) { | |
281 gclog_or_tty->print_cr("### YOUNG LIST does not seem empty"); | |
282 } | |
283 | |
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284 return ret; |
342 | 285 } |
286 | |
287 void | |
288 YoungList::rs_length_sampling_init() { | |
289 _sampled_rs_lengths = 0; | |
290 _curr = _head; | |
291 } | |
292 | |
293 bool | |
294 YoungList::rs_length_sampling_more() { | |
295 return _curr != NULL; | |
296 } | |
297 | |
298 void | |
299 YoungList::rs_length_sampling_next() { | |
300 assert( _curr != NULL, "invariant" ); | |
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301 size_t rs_length = _curr->rem_set()->occupied(); |
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302 |
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303 _sampled_rs_lengths += rs_length; |
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304 |
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305 // The current region may not yet have been added to the |
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306 // incremental collection set (it gets added when it is |
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307 // retired as the current allocation region). |
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308 if (_curr->in_collection_set()) { |
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309 // Update the collection set policy information for this region |
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310 _g1h->g1_policy()->update_incremental_cset_info(_curr, rs_length); |
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311 } |
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312 |
342 | 313 _curr = _curr->get_next_young_region(); |
314 if (_curr == NULL) { | |
315 _last_sampled_rs_lengths = _sampled_rs_lengths; | |
316 // gclog_or_tty->print_cr("last sampled RS lengths = %d", _last_sampled_rs_lengths); | |
317 } | |
318 } | |
319 | |
320 void | |
321 YoungList::reset_auxilary_lists() { | |
322 guarantee( is_empty(), "young list should be empty" ); | |
323 assert(check_list_well_formed(), "young list should be well formed"); | |
324 | |
325 // Add survivor regions to SurvRateGroup. | |
326 _g1h->g1_policy()->note_start_adding_survivor_regions(); | |
545 | 327 _g1h->g1_policy()->finished_recalculating_age_indexes(true /* is_survivors */); |
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328 |
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329 int young_index_in_cset = 0; |
342 | 330 for (HeapRegion* curr = _survivor_head; |
331 curr != NULL; | |
332 curr = curr->get_next_young_region()) { | |
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333 _g1h->g1_policy()->set_region_survivor(curr, young_index_in_cset); |
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334 |
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335 // The region is a non-empty survivor so let's add it to |
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336 // the incremental collection set for the next evacuation |
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337 // pause. |
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338 _g1h->g1_policy()->add_region_to_incremental_cset_rhs(curr); |
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339 young_index_in_cset += 1; |
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340 } |
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341 assert((uint) young_index_in_cset == _survivor_length, "post-condition"); |
342 | 342 _g1h->g1_policy()->note_stop_adding_survivor_regions(); |
343 | |
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344 _head = _survivor_head; |
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345 _length = _survivor_length; |
342 | 346 if (_survivor_head != NULL) { |
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347 assert(_survivor_tail != NULL, "cause it shouldn't be"); |
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348 assert(_survivor_length > 0, "invariant"); |
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349 _survivor_tail->set_next_young_region(NULL); |
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350 } |
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351 |
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352 // Don't clear the survivor list handles until the start of |
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353 // the next evacuation pause - we need it in order to re-tag |
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354 // the survivor regions from this evacuation pause as 'young' |
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355 // at the start of the next. |
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356 |
545 | 357 _g1h->g1_policy()->finished_recalculating_age_indexes(false /* is_survivors */); |
342 | 358 |
359 assert(check_list_well_formed(), "young list should be well formed"); | |
360 } | |
361 | |
362 void YoungList::print() { | |
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363 HeapRegion* lists[] = {_head, _survivor_head}; |
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364 const char* names[] = {"YOUNG", "SURVIVOR"}; |
342 | 365 |
366 for (unsigned int list = 0; list < ARRAY_SIZE(lists); ++list) { | |
367 gclog_or_tty->print_cr("%s LIST CONTENTS", names[list]); | |
368 HeapRegion *curr = lists[list]; | |
369 if (curr == NULL) | |
370 gclog_or_tty->print_cr(" empty"); | |
371 while (curr != NULL) { | |
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372 gclog_or_tty->print_cr(" "HR_FORMAT", P: "PTR_FORMAT ", N: "PTR_FORMAT", age: %4d", |
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373 HR_FORMAT_PARAMS(curr), |
342 | 374 curr->prev_top_at_mark_start(), |
375 curr->next_top_at_mark_start(), | |
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376 curr->age_in_surv_rate_group_cond()); |
342 | 377 curr = curr->get_next_young_region(); |
378 } | |
379 } | |
380 | |
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381 gclog_or_tty->cr(); |
342 | 382 } |
383 | |
20337 | 384 void G1RegionMappingChangedListener::reset_from_card_cache(uint start_idx, size_t num_regions) { |
385 OtherRegionsTable::invalidate(start_idx, num_regions); | |
386 } | |
387 | |
388 void G1RegionMappingChangedListener::on_commit(uint start_idx, size_t num_regions) { | |
389 reset_from_card_cache(start_idx, num_regions); | |
390 } | |
391 | |
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392 void G1CollectedHeap::push_dirty_cards_region(HeapRegion* hr) |
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393 { |
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394 // Claim the right to put the region on the dirty cards region list |
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395 // by installing a self pointer. |
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396 HeapRegion* next = hr->get_next_dirty_cards_region(); |
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397 if (next == NULL) { |
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398 HeapRegion* res = (HeapRegion*) |
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399 Atomic::cmpxchg_ptr(hr, hr->next_dirty_cards_region_addr(), |
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400 NULL); |
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401 if (res == NULL) { |
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402 HeapRegion* head; |
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403 do { |
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404 // Put the region to the dirty cards region list. |
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405 head = _dirty_cards_region_list; |
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406 next = (HeapRegion*) |
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407 Atomic::cmpxchg_ptr(hr, &_dirty_cards_region_list, head); |
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408 if (next == head) { |
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409 assert(hr->get_next_dirty_cards_region() == hr, |
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410 "hr->get_next_dirty_cards_region() != hr"); |
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411 if (next == NULL) { |
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412 // The last region in the list points to itself. |
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413 hr->set_next_dirty_cards_region(hr); |
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414 } else { |
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415 hr->set_next_dirty_cards_region(next); |
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416 } |
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417 } |
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418 } while (next != head); |
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419 } |
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420 } |
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421 } |
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422 |
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423 HeapRegion* G1CollectedHeap::pop_dirty_cards_region() |
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424 { |
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425 HeapRegion* head; |
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426 HeapRegion* hr; |
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427 do { |
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428 head = _dirty_cards_region_list; |
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429 if (head == NULL) { |
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430 return NULL; |
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431 } |
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432 HeapRegion* new_head = head->get_next_dirty_cards_region(); |
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433 if (head == new_head) { |
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434 // The last region. |
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435 new_head = NULL; |
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436 } |
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437 hr = (HeapRegion*)Atomic::cmpxchg_ptr(new_head, &_dirty_cards_region_list, |
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438 head); |
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439 } while (hr != head); |
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440 assert(hr != NULL, "invariant"); |
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441 hr->set_next_dirty_cards_region(NULL); |
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442 return hr; |
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443 } |
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444 |
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445 #ifdef ASSERT |
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446 // A region is added to the collection set as it is retired |
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447 // so an address p can point to a region which will be in the |
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448 // collection set but has not yet been retired. This method |
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449 // therefore is only accurate during a GC pause after all |
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450 // regions have been retired. It is used for debugging |
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451 // to check if an nmethod has references to objects that can |
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452 // be move during a partial collection. Though it can be |
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453 // inaccurate, it is sufficient for G1 because the conservative |
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454 // implementation of is_scavengable() for G1 will indicate that |
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455 // all nmethods must be scanned during a partial collection. |
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456 bool G1CollectedHeap::is_in_partial_collection(const void* p) { |
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457 if (p == NULL) { |
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458 return false; |
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459 } |
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460 return heap_region_containing(p)->in_collection_set(); |
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461 } |
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462 #endif |
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463 |
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464 // Returns true if the reference points to an object that |
10405 | 465 // can move in an incremental collection. |
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466 bool G1CollectedHeap::is_scavengable(const void* p) { |
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467 HeapRegion* hr = heap_region_containing(p); |
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468 return !hr->isHumongous(); |
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469 } |
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470 |
342 | 471 void G1CollectedHeap::check_ct_logs_at_safepoint() { |
472 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
12343 | 473 CardTableModRefBS* ct_bs = g1_barrier_set(); |
342 | 474 |
475 // Count the dirty cards at the start. | |
476 CountNonCleanMemRegionClosure count1(this); | |
477 ct_bs->mod_card_iterate(&count1); | |
478 int orig_count = count1.n(); | |
479 | |
480 // First clear the logged cards. | |
481 ClearLoggedCardTableEntryClosure clear; | |
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482 dcqs.apply_closure_to_all_completed_buffers(&clear); |
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483 dcqs.iterate_closure_all_threads(&clear, false); |
342 | 484 clear.print_histo(); |
485 | |
486 // Now ensure that there's no dirty cards. | |
487 CountNonCleanMemRegionClosure count2(this); | |
488 ct_bs->mod_card_iterate(&count2); | |
489 if (count2.n() != 0) { | |
490 gclog_or_tty->print_cr("Card table has %d entries; %d originally", | |
491 count2.n(), orig_count); | |
492 } | |
493 guarantee(count2.n() == 0, "Card table should be clean."); | |
494 | |
495 RedirtyLoggedCardTableEntryClosure redirty; | |
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496 dcqs.apply_closure_to_all_completed_buffers(&redirty); |
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497 dcqs.iterate_closure_all_threads(&redirty, false); |
342 | 498 gclog_or_tty->print_cr("Log entries = %d, dirty cards = %d.", |
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499 clear.num_processed(), orig_count); |
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500 guarantee(redirty.num_processed() == clear.num_processed(), |
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501 err_msg("Redirtied "SIZE_FORMAT" cards, bug cleared "SIZE_FORMAT, |
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502 redirty.num_processed(), clear.num_processed())); |
342 | 503 |
504 CountNonCleanMemRegionClosure count3(this); | |
505 ct_bs->mod_card_iterate(&count3); | |
506 if (count3.n() != orig_count) { | |
507 gclog_or_tty->print_cr("Should have restored them all: orig = %d, final = %d.", | |
508 orig_count, count3.n()); | |
509 guarantee(count3.n() >= orig_count, "Should have restored them all."); | |
510 } | |
511 } | |
512 | |
513 // Private class members. | |
514 | |
515 G1CollectedHeap* G1CollectedHeap::_g1h; | |
516 | |
517 // Private methods. | |
518 | |
2152 | 519 HeapRegion* |
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520 G1CollectedHeap::new_region_try_secondary_free_list(bool is_old) { |
2152 | 521 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
522 while (!_secondary_free_list.is_empty() || free_regions_coming()) { | |
523 if (!_secondary_free_list.is_empty()) { | |
524 if (G1ConcRegionFreeingVerbose) { | |
525 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
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526 "secondary_free_list has %u entries", |
2152 | 527 _secondary_free_list.length()); |
528 } | |
529 // It looks as if there are free regions available on the | |
530 // secondary_free_list. Let's move them to the free_list and try | |
531 // again to allocate from it. | |
532 append_secondary_free_list(); | |
533 | |
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534 assert(_hrm.num_free_regions() > 0, "if the secondary_free_list was not " |
2152 | 535 "empty we should have moved at least one entry to the free_list"); |
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536 HeapRegion* res = _hrm.allocate_free_region(is_old); |
2152 | 537 if (G1ConcRegionFreeingVerbose) { |
538 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
539 "allocated "HR_FORMAT" from secondary_free_list", | |
540 HR_FORMAT_PARAMS(res)); | |
541 } | |
542 return res; | |
543 } | |
544 | |
10405 | 545 // Wait here until we get notified either when (a) there are no |
2152 | 546 // more free regions coming or (b) some regions have been moved on |
547 // the secondary_free_list. | |
548 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
549 } | |
550 | |
551 if (G1ConcRegionFreeingVerbose) { | |
552 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
553 "could not allocate from secondary_free_list"); | |
554 } | |
555 return NULL; | |
556 } | |
557 | |
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558 HeapRegion* G1CollectedHeap::new_region(size_t word_size, bool is_old, bool do_expand) { |
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559 assert(!isHumongous(word_size) || word_size <= HeapRegion::GrainWords, |
2152 | 560 "the only time we use this to allocate a humongous region is " |
561 "when we are allocating a single humongous region"); | |
562 | |
563 HeapRegion* res; | |
564 if (G1StressConcRegionFreeing) { | |
565 if (!_secondary_free_list.is_empty()) { | |
566 if (G1ConcRegionFreeingVerbose) { | |
567 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
568 "forced to look at the secondary_free_list"); | |
569 } | |
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570 res = new_region_try_secondary_free_list(is_old); |
2152 | 571 if (res != NULL) { |
572 return res; | |
573 } | |
574 } | |
575 } | |
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576 |
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577 res = _hrm.allocate_free_region(is_old); |
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578 |
2152 | 579 if (res == NULL) { |
580 if (G1ConcRegionFreeingVerbose) { | |
581 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
582 "res == NULL, trying the secondary_free_list"); | |
583 } | |
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584 res = new_region_try_secondary_free_list(is_old); |
2152 | 585 } |
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586 if (res == NULL && do_expand && _expand_heap_after_alloc_failure) { |
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587 // Currently, only attempts to allocate GC alloc regions set |
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588 // do_expand to true. So, we should only reach here during a |
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589 // safepoint. If this assumption changes we might have to |
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590 // reconsider the use of _expand_heap_after_alloc_failure. |
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591 assert(SafepointSynchronize::is_at_safepoint(), "invariant"); |
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592 |
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593 ergo_verbose1(ErgoHeapSizing, |
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594 "attempt heap expansion", |
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595 ergo_format_reason("region allocation request failed") |
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596 ergo_format_byte("allocation request"), |
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597 word_size * HeapWordSize); |
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598 if (expand(word_size * HeapWordSize)) { |
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599 // Given that expand() succeeded in expanding the heap, and we |
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600 // always expand the heap by an amount aligned to the heap |
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601 // region size, the free list should in theory not be empty. |
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602 // In either case allocate_free_region() will check for NULL. |
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603 res = _hrm.allocate_free_region(is_old); |
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604 } else { |
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605 _expand_heap_after_alloc_failure = false; |
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606 } |
342 | 607 } |
608 return res; | |
609 } | |
610 | |
2361 | 611 HeapWord* |
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612 G1CollectedHeap::humongous_obj_allocate_initialize_regions(uint first, |
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613 uint num_regions, |
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614 size_t word_size, |
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615 AllocationContext_t context) { |
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616 assert(first != G1_NO_HRM_INDEX, "pre-condition"); |
2361 | 617 assert(isHumongous(word_size), "word_size should be humongous"); |
618 assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); | |
619 | |
620 // Index of last region in the series + 1. | |
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621 uint last = first + num_regions; |
2361 | 622 |
623 // We need to initialize the region(s) we just discovered. This is | |
624 // a bit tricky given that it can happen concurrently with | |
625 // refinement threads refining cards on these regions and | |
626 // potentially wanting to refine the BOT as they are scanning | |
627 // those cards (this can happen shortly after a cleanup; see CR | |
628 // 6991377). So we have to set up the region(s) carefully and in | |
629 // a specific order. | |
630 | |
631 // The word size sum of all the regions we will allocate. | |
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632 size_t word_size_sum = (size_t) num_regions * HeapRegion::GrainWords; |
2361 | 633 assert(word_size <= word_size_sum, "sanity"); |
634 | |
635 // This will be the "starts humongous" region. | |
3766 | 636 HeapRegion* first_hr = region_at(first); |
2361 | 637 // The header of the new object will be placed at the bottom of |
638 // the first region. | |
639 HeapWord* new_obj = first_hr->bottom(); | |
640 // This will be the new end of the first region in the series that | |
10405 | 641 // should also match the end of the last region in the series. |
2361 | 642 HeapWord* new_end = new_obj + word_size_sum; |
643 // This will be the new top of the first region that will reflect | |
644 // this allocation. | |
645 HeapWord* new_top = new_obj + word_size; | |
646 | |
647 // First, we need to zero the header of the space that we will be | |
648 // allocating. When we update top further down, some refinement | |
649 // threads might try to scan the region. By zeroing the header we | |
650 // ensure that any thread that will try to scan the region will | |
651 // come across the zero klass word and bail out. | |
652 // | |
653 // NOTE: It would not have been correct to have used | |
654 // CollectedHeap::fill_with_object() and make the space look like | |
655 // an int array. The thread that is doing the allocation will | |
656 // later update the object header to a potentially different array | |
657 // type and, for a very short period of time, the klass and length | |
658 // fields will be inconsistent. This could cause a refinement | |
659 // thread to calculate the object size incorrectly. | |
660 Copy::fill_to_words(new_obj, oopDesc::header_size(), 0); | |
661 | |
662 // We will set up the first region as "starts humongous". This | |
663 // will also update the BOT covering all the regions to reflect | |
664 // that there is a single object that starts at the bottom of the | |
665 // first region. | |
666 first_hr->set_startsHumongous(new_top, new_end); | |
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667 first_hr->set_allocation_context(context); |
2361 | 668 // Then, if there are any, we will set up the "continues |
669 // humongous" regions. | |
670 HeapRegion* hr = NULL; | |
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671 for (uint i = first + 1; i < last; ++i) { |
3766 | 672 hr = region_at(i); |
2361 | 673 hr->set_continuesHumongous(first_hr); |
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674 hr->set_allocation_context(context); |
2361 | 675 } |
676 // If we have "continues humongous" regions (hr != NULL), then the | |
677 // end of the last one should match new_end. | |
678 assert(hr == NULL || hr->end() == new_end, "sanity"); | |
679 | |
680 // Up to this point no concurrent thread would have been able to | |
681 // do any scanning on any region in this series. All the top | |
682 // fields still point to bottom, so the intersection between | |
683 // [bottom,top] and [card_start,card_end] will be empty. Before we | |
684 // update the top fields, we'll do a storestore to make sure that | |
685 // no thread sees the update to top before the zeroing of the | |
686 // object header and the BOT initialization. | |
687 OrderAccess::storestore(); | |
688 | |
689 // Now that the BOT and the object header have been initialized, | |
690 // we can update top of the "starts humongous" region. | |
691 assert(first_hr->bottom() < new_top && new_top <= first_hr->end(), | |
692 "new_top should be in this region"); | |
693 first_hr->set_top(new_top); | |
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694 if (_hr_printer.is_active()) { |
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695 HeapWord* bottom = first_hr->bottom(); |
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696 HeapWord* end = first_hr->orig_end(); |
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697 if ((first + 1) == last) { |
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698 // the series has a single humongous region |
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699 _hr_printer.alloc(G1HRPrinter::SingleHumongous, first_hr, new_top); |
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700 } else { |
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701 // the series has more than one humongous regions |
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702 _hr_printer.alloc(G1HRPrinter::StartsHumongous, first_hr, end); |
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703 } |
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704 } |
2361 | 705 |
706 // Now, we will update the top fields of the "continues humongous" | |
707 // regions. The reason we need to do this is that, otherwise, | |
708 // these regions would look empty and this will confuse parts of | |
709 // G1. For example, the code that looks for a consecutive number | |
710 // of empty regions will consider them empty and try to | |
711 // re-allocate them. We can extend is_empty() to also include | |
712 // !continuesHumongous(), but it is easier to just update the top | |
713 // fields here. The way we set top for all regions (i.e., top == | |
714 // end for all regions but the last one, top == new_top for the | |
715 // last one) is actually used when we will free up the humongous | |
716 // region in free_humongous_region(). | |
717 hr = NULL; | |
6010
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718 for (uint i = first + 1; i < last; ++i) { |
3766 | 719 hr = region_at(i); |
2361 | 720 if ((i + 1) == last) { |
721 // last continues humongous region | |
722 assert(hr->bottom() < new_top && new_top <= hr->end(), | |
723 "new_top should fall on this region"); | |
724 hr->set_top(new_top); | |
3778
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725 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, new_top); |
2361 | 726 } else { |
727 // not last one | |
728 assert(new_top > hr->end(), "new_top should be above this region"); | |
729 hr->set_top(hr->end()); | |
3778
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730 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, hr->end()); |
2361 | 731 } |
732 } | |
733 // If we have continues humongous regions (hr != NULL), then the | |
734 // end of the last one should match new_end and its top should | |
735 // match new_top. | |
736 assert(hr == NULL || | |
737 (hr->end() == new_end && hr->top() == new_top), "sanity"); | |
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738 check_bitmaps("Humongous Region Allocation", first_hr); |
2361 | 739 |
740 assert(first_hr->used() == word_size * HeapWordSize, "invariant"); | |
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741 _allocator->increase_used(first_hr->used()); |
2361 | 742 _humongous_set.add(first_hr); |
743 | |
744 return new_obj; | |
745 } | |
746 | |
342 | 747 // If could fit into free regions w/o expansion, try. |
748 // Otherwise, if can expand, do so. | |
749 // Otherwise, if using ex regions might help, try with ex given back. | |
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750 HeapWord* G1CollectedHeap::humongous_obj_allocate(size_t word_size, AllocationContext_t context) { |
2152 | 751 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
752 | |
753 verify_region_sets_optional(); | |
342 | 754 |
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755 uint first = G1_NO_HRM_INDEX; |
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756 uint obj_regions = (uint)(align_size_up_(word_size, HeapRegion::GrainWords) / HeapRegion::GrainWords); |
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757 |
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758 if (obj_regions == 1) { |
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759 // Only one region to allocate, try to use a fast path by directly allocating |
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760 // from the free lists. Do not try to expand here, we will potentially do that |
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761 // later. |
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762 HeapRegion* hr = new_region(word_size, true /* is_old */, false /* do_expand */); |
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763 if (hr != NULL) { |
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764 first = hr->hrm_index(); |
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765 } |
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766 } else { |
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767 // We can't allocate humongous regions spanning more than one region while |
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768 // cleanupComplete() is running, since some of the regions we find to be |
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769 // empty might not yet be added to the free list. It is not straightforward |
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770 // to know in which list they are on so that we can remove them. We only |
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771 // need to do this if we need to allocate more than one region to satisfy the |
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772 // current humongous allocation request. If we are only allocating one region |
20337 | 773 // we use the one-region region allocation code (see above), that already |
774 // potentially waits for regions from the secondary free list. | |
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775 wait_while_free_regions_coming(); |
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776 append_secondary_free_list_if_not_empty_with_lock(); |
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777 |
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778 // Policy: Try only empty regions (i.e. already committed first). Maybe we |
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779 // are lucky enough to find some. |
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780 first = _hrm.find_contiguous_only_empty(obj_regions); |
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781 if (first != G1_NO_HRM_INDEX) { |
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782 _hrm.allocate_free_regions_starting_at(first, obj_regions); |
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783 } |
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784 } |
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785 |
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786 if (first == G1_NO_HRM_INDEX) { |
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787 // Policy: We could not find enough regions for the humongous object in the |
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788 // free list. Look through the heap to find a mix of free and uncommitted regions. |
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789 // If so, try expansion. |
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790 first = _hrm.find_contiguous_empty_or_unavailable(obj_regions); |
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791 if (first != G1_NO_HRM_INDEX) { |
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792 // We found something. Make sure these regions are committed, i.e. expand |
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793 // the heap. Alternatively we could do a defragmentation GC. |
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794 ergo_verbose1(ErgoHeapSizing, |
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795 "attempt heap expansion", |
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796 ergo_format_reason("humongous allocation request failed") |
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797 ergo_format_byte("allocation request"), |
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798 word_size * HeapWordSize); |
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799 |
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800 _hrm.expand_at(first, obj_regions); |
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801 g1_policy()->record_new_heap_size(num_regions()); |
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802 |
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803 #ifdef ASSERT |
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804 for (uint i = first; i < first + obj_regions; ++i) { |
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805 HeapRegion* hr = region_at(i); |
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806 assert(hr->is_free(), "sanity"); |
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807 assert(hr->is_empty(), "sanity"); |
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808 assert(is_on_master_free_list(hr), "sanity"); |
2188
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809 } |
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810 #endif |
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811 _hrm.allocate_free_regions_starting_at(first, obj_regions); |
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812 } else { |
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813 // Policy: Potentially trigger a defragmentation GC. |
2152 | 814 } |
815 } | |
816 | |
2361 | 817 HeapWord* result = NULL; |
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818 if (first != G1_NO_HRM_INDEX) { |
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819 result = humongous_obj_allocate_initialize_regions(first, obj_regions, |
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820 word_size, context); |
2361 | 821 assert(result != NULL, "it should always return a valid result"); |
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822 |
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823 // A successful humongous object allocation changes the used space |
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824 // information of the old generation so we need to recalculate the |
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825 // sizes and update the jstat counters here. |
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826 g1mm()->update_sizes(); |
2152 | 827 } |
828 | |
829 verify_region_sets_optional(); | |
2361 | 830 |
831 return result; | |
342 | 832 } |
833 | |
1973 | 834 HeapWord* G1CollectedHeap::allocate_new_tlab(size_t word_size) { |
835 assert_heap_not_locked_and_not_at_safepoint(); | |
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836 assert(!isHumongous(word_size), "we do not allow humongous TLABs"); |
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837 |
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838 unsigned int dummy_gc_count_before; |
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839 int dummy_gclocker_retry_count = 0; |
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840 return attempt_allocation(word_size, &dummy_gc_count_before, &dummy_gclocker_retry_count); |
342 | 841 } |
842 | |
843 HeapWord* | |
844 G1CollectedHeap::mem_allocate(size_t word_size, | |
1973 | 845 bool* gc_overhead_limit_was_exceeded) { |
846 assert_heap_not_locked_and_not_at_safepoint(); | |
342 | 847 |
10405 | 848 // Loop until the allocation is satisfied, or unsatisfied after GC. |
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849 for (int try_count = 1, gclocker_retry_count = 0; /* we'll return */; try_count += 1) { |
1973 | 850 unsigned int gc_count_before; |
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851 |
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852 HeapWord* result = NULL; |
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853 if (!isHumongous(word_size)) { |
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854 result = attempt_allocation(word_size, &gc_count_before, &gclocker_retry_count); |
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855 } else { |
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856 result = attempt_allocation_humongous(word_size, &gc_count_before, &gclocker_retry_count); |
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857 } |
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858 if (result != NULL) { |
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859 return result; |
342 | 860 } |
861 | |
862 // Create the garbage collection operation... | |
1973 | 863 VM_G1CollectForAllocation op(gc_count_before, word_size); |
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864 op.set_allocation_context(AllocationContext::current()); |
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865 |
342 | 866 // ...and get the VM thread to execute it. |
867 VMThread::execute(&op); | |
1973 | 868 |
869 if (op.prologue_succeeded() && op.pause_succeeded()) { | |
870 // If the operation was successful we'll return the result even | |
871 // if it is NULL. If the allocation attempt failed immediately | |
872 // after a Full GC, it's unlikely we'll be able to allocate now. | |
873 HeapWord* result = op.result(); | |
874 if (result != NULL && !isHumongous(word_size)) { | |
875 // Allocations that take place on VM operations do not do any | |
876 // card dirtying and we have to do it here. We only have to do | |
877 // this for non-humongous allocations, though. | |
878 dirty_young_block(result, word_size); | |
879 } | |
342 | 880 return result; |
1973 | 881 } else { |
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882 if (gclocker_retry_count > GCLockerRetryAllocationCount) { |
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883 return NULL; |
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884 } |
1973 | 885 assert(op.result() == NULL, |
886 "the result should be NULL if the VM op did not succeed"); | |
342 | 887 } |
888 | |
889 // Give a warning if we seem to be looping forever. | |
890 if ((QueuedAllocationWarningCount > 0) && | |
891 (try_count % QueuedAllocationWarningCount == 0)) { | |
1973 | 892 warning("G1CollectedHeap::mem_allocate retries %d times", try_count); |
342 | 893 } |
894 } | |
1973 | 895 |
896 ShouldNotReachHere(); | |
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897 return NULL; |
342 | 898 } |
899 | |
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900 HeapWord* G1CollectedHeap::attempt_allocation_slow(size_t word_size, |
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901 AllocationContext_t context, |
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902 unsigned int *gc_count_before_ret, |
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|
903 int* gclocker_retry_count_ret) { |
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904 // Make sure you read the note in attempt_allocation_humongous(). |
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905 |
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906 assert_heap_not_locked_and_not_at_safepoint(); |
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907 assert(!isHumongous(word_size), "attempt_allocation_slow() should not " |
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908 "be called for humongous allocation requests"); |
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|
909 |
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910 // We should only get here after the first-level allocation attempt |
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911 // (attempt_allocation()) failed to allocate. |
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912 |
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913 // We will loop until a) we manage to successfully perform the |
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914 // allocation or b) we successfully schedule a collection which |
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915 // fails to perform the allocation. b) is the only case when we'll |
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916 // return NULL. |
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917 HeapWord* result = NULL; |
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918 for (int try_count = 1; /* we'll return */; try_count += 1) { |
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919 bool should_try_gc; |
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920 unsigned int gc_count_before; |
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921 |
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922 { |
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923 MutexLockerEx x(Heap_lock); |
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924 result = _allocator->mutator_alloc_region(context)->attempt_allocation_locked(word_size, |
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925 false /* bot_updates */); |
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926 if (result != NULL) { |
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|
927 return result; |
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|
928 } |
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929 |
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930 // If we reach here, attempt_allocation_locked() above failed to |
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931 // allocate a new region. So the mutator alloc region should be NULL. |
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932 assert(_allocator->mutator_alloc_region(context)->get() == NULL, "only way to get here"); |
2433
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|
933 |
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934 if (GC_locker::is_active_and_needs_gc()) { |
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935 if (g1_policy()->can_expand_young_list()) { |
3914
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
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|
936 // No need for an ergo verbose message here, |
20213c8a3c40
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|
937 // can_expand_young_list() does this when it returns true. |
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|
938 result = _allocator->mutator_alloc_region(context)->attempt_allocation_force(word_size, |
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|
939 false /* bot_updates */); |
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|
940 if (result != NULL) { |
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|
941 return result; |
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|
942 } |
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|
943 } |
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|
944 should_try_gc = false; |
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|
945 } else { |
6106
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946 // The GCLocker may not be active but the GCLocker initiated |
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947 // GC may not yet have been performed (GCLocker::needs_gc() |
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948 // returns true). In this case we do not try this GC and |
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949 // wait until the GCLocker initiated GC is performed, and |
1d478c993020
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|
950 // then retry the allocation. |
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|
951 if (GC_locker::needs_gc()) { |
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|
952 should_try_gc = false; |
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|
953 } else { |
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|
954 // Read the GC count while still holding the Heap_lock. |
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|
955 gc_count_before = total_collections(); |
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|
956 should_try_gc = true; |
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|
957 } |
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|
958 } |
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|
959 } |
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|
960 |
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|
961 if (should_try_gc) { |
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|
962 bool succeeded; |
12113
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
12082
diff
changeset
|
963 result = do_collection_pause(word_size, gc_count_before, &succeeded, |
f7d3b4387a16
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|
964 GCCause::_g1_inc_collection_pause); |
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965 if (result != NULL) { |
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|
966 assert(succeeded, "only way to get back a non-NULL result"); |
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|
967 return result; |
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|
968 } |
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|
969 |
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|
970 if (succeeded) { |
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|
971 // If we get here we successfully scheduled a collection which |
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|
972 // failed to allocate. No point in trying to allocate |
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|
973 // further. We'll just return NULL. |
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|
974 MutexLockerEx x(Heap_lock); |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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parents:
4875
diff
changeset
|
975 *gc_count_before_ret = total_collections(); |
2433
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|
976 return NULL; |
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|
977 } |
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|
978 } else { |
8853
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
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|
979 if (*gclocker_retry_count_ret > GCLockerRetryAllocationCount) { |
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|
980 MutexLockerEx x(Heap_lock); |
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|
981 *gc_count_before_ret = total_collections(); |
2e093b564241
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|
982 return NULL; |
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|
983 } |
6106
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|
984 // The GCLocker is either active or the GCLocker initiated |
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|
985 // GC has not yet been performed. Stall until it is and |
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|
986 // then retry the allocation. |
2433
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|
987 GC_locker::stall_until_clear(); |
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|
988 (*gclocker_retry_count_ret) += 1; |
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|
989 } |
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|
990 |
10405 | 991 // We can reach here if we were unsuccessful in scheduling a |
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992 // collection (because another thread beat us to it) or if we were |
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|
993 // stalled due to the GC locker. In either can we should retry the |
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|
994 // allocation attempt in case another thread successfully |
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|
995 // performed a collection and reclaimed enough space. We do the |
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|
996 // first attempt (without holding the Heap_lock) here and the |
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|
997 // follow-on attempt will be at the start of the next loop |
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|
998 // iteration (after taking the Heap_lock). |
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|
999 result = _allocator->mutator_alloc_region(context)->attempt_allocation(word_size, |
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|
1000 false /* bot_updates */); |
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
1001 if (result != NULL) { |
2433
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|
1002 return result; |
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|
1003 } |
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|
1004 |
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|
1005 // Give a warning if we seem to be looping forever. |
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|
1006 if ((QueuedAllocationWarningCount > 0) && |
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1007 (try_count % QueuedAllocationWarningCount == 0)) { |
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1008 warning("G1CollectedHeap::attempt_allocation_slow() " |
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1009 "retries %d times", try_count); |
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|
1010 } |
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|
1011 } |
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|
1012 |
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|
1013 ShouldNotReachHere(); |
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|
1014 return NULL; |
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|
1015 } |
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|
1016 |
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1017 HeapWord* G1CollectedHeap::attempt_allocation_humongous(size_t word_size, |
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1018 unsigned int * gc_count_before_ret, |
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1019 int* gclocker_retry_count_ret) { |
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1020 // The structure of this method has a lot of similarities to |
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|
1021 // attempt_allocation_slow(). The reason these two were not merged |
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1022 // into a single one is that such a method would require several "if |
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1023 // allocation is not humongous do this, otherwise do that" |
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1024 // conditional paths which would obscure its flow. In fact, an early |
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1025 // version of this code did use a unified method which was harder to |
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1026 // follow and, as a result, it had subtle bugs that were hard to |
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1027 // track down. So keeping these two methods separate allows each to |
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1028 // be more readable. It will be good to keep these two in sync as |
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1029 // much as possible. |
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1030 |
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1031 assert_heap_not_locked_and_not_at_safepoint(); |
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1032 assert(isHumongous(word_size), "attempt_allocation_humongous() " |
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1033 "should only be called for humongous allocations"); |
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1034 |
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1035 // Humongous objects can exhaust the heap quickly, so we should check if we |
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1036 // need to start a marking cycle at each humongous object allocation. We do |
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1037 // the check before we do the actual allocation. The reason for doing it |
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1038 // before the allocation is that we avoid having to keep track of the newly |
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1039 // allocated memory while we do a GC. |
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1040 if (g1_policy()->need_to_start_conc_mark("concurrent humongous allocation", |
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1041 word_size)) { |
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1042 collect(GCCause::_g1_humongous_allocation); |
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1043 } |
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1044 |
2433
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1045 // We will loop until a) we manage to successfully perform the |
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1046 // allocation or b) we successfully schedule a collection which |
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1047 // fails to perform the allocation. b) is the only case when we'll |
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1048 // return NULL. |
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1049 HeapWord* result = NULL; |
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1050 for (int try_count = 1; /* we'll return */; try_count += 1) { |
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1051 bool should_try_gc; |
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1052 unsigned int gc_count_before; |
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1053 |
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1054 { |
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1055 MutexLockerEx x(Heap_lock); |
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1056 |
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1057 // Given that humongous objects are not allocated in young |
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1058 // regions, we'll first try to do the allocation without doing a |
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1059 // collection hoping that there's enough space in the heap. |
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1060 result = humongous_obj_allocate(word_size, AllocationContext::current()); |
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1061 if (result != NULL) { |
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1062 return result; |
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1063 } |
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1064 |
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1065 if (GC_locker::is_active_and_needs_gc()) { |
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1066 should_try_gc = false; |
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1067 } else { |
6106
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1068 // The GCLocker may not be active but the GCLocker initiated |
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1069 // GC may not yet have been performed (GCLocker::needs_gc() |
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1070 // returns true). In this case we do not try this GC and |
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1071 // wait until the GCLocker initiated GC is performed, and |
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1072 // then retry the allocation. |
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1073 if (GC_locker::needs_gc()) { |
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1074 should_try_gc = false; |
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1075 } else { |
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1076 // Read the GC count while still holding the Heap_lock. |
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1077 gc_count_before = total_collections(); |
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1078 should_try_gc = true; |
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1079 } |
2433
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1080 } |
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1081 } |
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1082 |
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1083 if (should_try_gc) { |
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1084 // If we failed to allocate the humongous object, we should try to |
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1085 // do a collection pause (if we're allowed) in case it reclaims |
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1086 // enough space for the allocation to succeed after the pause. |
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1087 |
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1088 bool succeeded; |
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1089 result = do_collection_pause(word_size, gc_count_before, &succeeded, |
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1090 GCCause::_g1_humongous_allocation); |
2433
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1091 if (result != NULL) { |
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1092 assert(succeeded, "only way to get back a non-NULL result"); |
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1093 return result; |
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1094 } |
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1095 |
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1096 if (succeeded) { |
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1097 // If we get here we successfully scheduled a collection which |
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1098 // failed to allocate. No point in trying to allocate |
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1099 // further. We'll just return NULL. |
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1100 MutexLockerEx x(Heap_lock); |
4910
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1101 *gc_count_before_ret = total_collections(); |
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1102 return NULL; |
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1103 } |
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1104 } else { |
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1105 if (*gclocker_retry_count_ret > GCLockerRetryAllocationCount) { |
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1106 MutexLockerEx x(Heap_lock); |
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1107 *gc_count_before_ret = total_collections(); |
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1108 return NULL; |
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1109 } |
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1110 // The GCLocker is either active or the GCLocker initiated |
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1111 // GC has not yet been performed. Stall until it is and |
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1112 // then retry the allocation. |
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1113 GC_locker::stall_until_clear(); |
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1114 (*gclocker_retry_count_ret) += 1; |
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1115 } |
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1116 |
10405 | 1117 // We can reach here if we were unsuccessful in scheduling a |
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1118 // collection (because another thread beat us to it) or if we were |
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1119 // stalled due to the GC locker. In either can we should retry the |
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1120 // allocation attempt in case another thread successfully |
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1121 // performed a collection and reclaimed enough space. Give a |
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1122 // warning if we seem to be looping forever. |
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1123 |
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1124 if ((QueuedAllocationWarningCount > 0) && |
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1125 (try_count % QueuedAllocationWarningCount == 0)) { |
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1126 warning("G1CollectedHeap::attempt_allocation_humongous() " |
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1127 "retries %d times", try_count); |
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1128 } |
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1129 } |
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1130 |
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1131 ShouldNotReachHere(); |
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1132 return NULL; |
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1133 } |
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1134 |
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1135 HeapWord* G1CollectedHeap::attempt_allocation_at_safepoint(size_t word_size, |
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1136 AllocationContext_t context, |
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1137 bool expect_null_mutator_alloc_region) { |
2152 | 1138 assert_at_safepoint(true /* should_be_vm_thread */); |
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1139 assert(_allocator->mutator_alloc_region(context)->get() == NULL || |
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1140 !expect_null_mutator_alloc_region, |
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1141 "the current alloc region was unexpectedly found to be non-NULL"); |
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1142 |
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1143 if (!isHumongous(word_size)) { |
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1144 return _allocator->mutator_alloc_region(context)->attempt_allocation_locked(word_size, |
2433
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1145 false /* bot_updates */); |
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1146 } else { |
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1147 HeapWord* result = humongous_obj_allocate(word_size, context); |
4829
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1148 if (result != NULL && g1_policy()->need_to_start_conc_mark("STW humongous allocation")) { |
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1149 g1_policy()->set_initiate_conc_mark_if_possible(); |
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|
1150 } |
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1151 return result; |
2433
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|
1152 } |
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|
1153 |
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1154 ShouldNotReachHere(); |
342 | 1155 } |
1156 | |
1157 class PostMCRemSetClearClosure: public HeapRegionClosure { | |
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1158 G1CollectedHeap* _g1h; |
342 | 1159 ModRefBarrierSet* _mr_bs; |
1160 public: | |
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1161 PostMCRemSetClearClosure(G1CollectedHeap* g1h, ModRefBarrierSet* mr_bs) : |
12080 | 1162 _g1h(g1h), _mr_bs(mr_bs) {} |
1163 | |
342 | 1164 bool doHeapRegion(HeapRegion* r) { |
12080 | 1165 HeapRegionRemSet* hrrs = r->rem_set(); |
1166 | |
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1167 if (r->continuesHumongous()) { |
12080 | 1168 // We'll assert that the strong code root list and RSet is empty |
1169 assert(hrrs->strong_code_roots_list_length() == 0, "sanity"); | |
1170 assert(hrrs->occupied() == 0, "RSet should be empty"); | |
342 | 1171 return false; |
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1172 } |
12080 | 1173 |
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1174 _g1h->reset_gc_time_stamps(r); |
12080 | 1175 hrrs->clear(); |
342 | 1176 // You might think here that we could clear just the cards |
1177 // corresponding to the used region. But no: if we leave a dirty card | |
1178 // in a region we might allocate into, then it would prevent that card | |
1179 // from being enqueued, and cause it to be missed. | |
1180 // Re: the performance cost: we shouldn't be doing full GC anyway! | |
1181 _mr_bs->clear(MemRegion(r->bottom(), r->end())); | |
12080 | 1182 |
342 | 1183 return false; |
1184 } | |
1185 }; | |
1186 | |
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1187 void G1CollectedHeap::clear_rsets_post_compaction() { |
12343 | 1188 PostMCRemSetClearClosure rs_clear(this, g1_barrier_set()); |
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1189 heap_region_iterate(&rs_clear); |
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1190 } |
342 | 1191 |
626
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1192 class RebuildRSOutOfRegionClosure: public HeapRegionClosure { |
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1193 G1CollectedHeap* _g1h; |
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1194 UpdateRSOopClosure _cl; |
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1195 int _worker_i; |
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1196 public: |
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1197 RebuildRSOutOfRegionClosure(G1CollectedHeap* g1, int worker_i = 0) : |
1861 | 1198 _cl(g1->g1_rem_set(), worker_i), |
626
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1199 _worker_i(worker_i), |
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1200 _g1h(g1) |
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|
1201 { } |
1960
878b57474103
6978187: G1: assert(ParallelGCThreads> 1 || n_yielded() == _hrrs->occupied()) strikes again
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|
1202 |
626
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1203 bool doHeapRegion(HeapRegion* r) { |
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1204 if (!r->continuesHumongous()) { |
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1205 _cl.set_from(r); |
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|
1206 r->oop_iterate(&_cl); |
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|
1207 } |
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|
1208 return false; |
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|
1209 } |
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|
1210 }; |
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|
1211 |
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1212 class ParRebuildRSTask: public AbstractGangTask { |
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1213 G1CollectedHeap* _g1; |
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1214 public: |
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|
1215 ParRebuildRSTask(G1CollectedHeap* g1) |
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1216 : AbstractGangTask("ParRebuildRSTask"), |
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1217 _g1(g1) |
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1218 { } |
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1219 |
4728
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|
1220 void work(uint worker_id) { |
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|
1221 RebuildRSOutOfRegionClosure rebuild_rs(_g1, worker_id); |
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1222 _g1->heap_region_par_iterate_chunked(&rebuild_rs, worker_id, |
4095
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|
1223 _g1->workers()->active_workers(), |
626
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|
1224 HeapRegion::RebuildRSClaimValue); |
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|
1225 } |
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|
1226 }; |
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1227 |
3778
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|
1228 class PostCompactionPrinterClosure: public HeapRegionClosure { |
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|
1229 private: |
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1230 G1HRPrinter* _hr_printer; |
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1231 public: |
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1232 bool doHeapRegion(HeapRegion* hr) { |
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|
1233 assert(!hr->is_young(), "not expecting to find young regions"); |
20481
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1234 if (hr->is_free()) { |
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1235 // We only generate output for non-empty regions. |
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|
1236 } else if (hr->startsHumongous()) { |
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|
1237 if (hr->region_num() == 1) { |
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diff
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1238 // single humongous region |
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1239 _hr_printer->post_compaction(hr, G1HRPrinter::SingleHumongous); |
3778
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|
1240 } else { |
20481
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|
1241 _hr_printer->post_compaction(hr, G1HRPrinter::StartsHumongous); |
3778
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|
1242 } |
20481
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|
1243 } else if (hr->continuesHumongous()) { |
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|
1244 _hr_printer->post_compaction(hr, G1HRPrinter::ContinuesHumongous); |
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|
1245 } else if (hr->is_old()) { |
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|
1246 _hr_printer->post_compaction(hr, G1HRPrinter::Old); |
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|
1247 } else { |
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|
1248 ShouldNotReachHere(); |
3778
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|
1249 } |
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|
1250 return false; |
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|
1251 } |
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|
1252 |
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|
1253 PostCompactionPrinterClosure(G1HRPrinter* hr_printer) |
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1254 : _hr_printer(hr_printer) { } |
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|
1255 }; |
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3777
diff
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|
1256 |
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
1257 void G1CollectedHeap::print_hrm_post_compaction() { |
6254
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1258 PostCompactionPrinterClosure cl(hr_printer()); |
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|
1259 heap_region_iterate(&cl); |
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1260 } |
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1261 |
1973 | 1262 bool G1CollectedHeap::do_collection(bool explicit_gc, |
1656
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1611
diff
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|
1263 bool clear_all_soft_refs, |
342 | 1264 size_t word_size) { |
2152 | 1265 assert_at_safepoint(true /* should_be_vm_thread */); |
1266 | |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
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diff
changeset
|
1267 if (GC_locker::check_active_before_gc()) { |
1973 | 1268 return false; |
1359
23b1b27ac76c
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|
1269 } |
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diff
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|
1270 |
10405 | 1271 STWGCTimer* gc_timer = G1MarkSweep::gc_timer(); |
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
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13062
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|
1272 gc_timer->register_gc_start(); |
10405 | 1273 |
1274 SerialOldTracer* gc_tracer = G1MarkSweep::gc_tracer(); | |
1275 gc_tracer->report_gc_start(gc_cause(), gc_timer->gc_start()); | |
1276 | |
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
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2039
diff
changeset
|
1277 SvcGCMarker sgcm(SvcGCMarker::FULL); |
342 | 1278 ResourceMark rm; |
1279 | |
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
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parents:
4787
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|
1280 print_heap_before_gc(); |
10405 | 1281 trace_heap_before_gc(gc_tracer); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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|
1282 |
17866
270d7cb38f40
8038934: Remove prefix allocated_ from methods and variables in Metaspace
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17844
diff
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|
1283 size_t metadata_prev_used = MetaspaceAux::used_bytes(); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
1284 |
2152 | 1285 verify_region_sets_optional(); |
342 | 1286 |
1387
0bfd3fb24150
6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
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|
1287 const bool do_clear_all_soft_refs = clear_all_soft_refs || |
0bfd3fb24150
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|
1288 collector_policy()->should_clear_all_soft_refs(); |
0bfd3fb24150
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|
1289 |
0bfd3fb24150
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1360
diff
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|
1290 ClearedAllSoftRefs casr(do_clear_all_soft_refs, collector_policy()); |
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|
1291 |
342 | 1292 { |
1293 IsGCActiveMark x; | |
1294 | |
1295 // Timing | |
6030 | 1296 assert(gc_cause() != GCCause::_java_lang_system_gc || explicit_gc, "invariant"); |
6007
5c86f8211d1e
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|
1297 gclog_or_tty->date_stamp(G1Log::fine() && PrintGCDateStamps); |
5c86f8211d1e
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|
1298 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
6030 | 1299 |
342 | 1300 { |
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
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17992
diff
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|
1301 GCTraceTime t(GCCauseString("Full GC", gc_cause()), G1Log::fine(), true, NULL, gc_tracer->gc_id()); |
10098
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|
1302 TraceCollectorStats tcs(g1mm()->full_collection_counters()); |
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|
1303 TraceMemoryManagerStats tms(true /* fullGC */, gc_cause()); |
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|
1304 |
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1305 double start = os::elapsedTime(); |
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1306 g1_policy()->record_full_collection_start(); |
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|
1307 |
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|
1308 // Note: When we have a more flexible GC logging framework that |
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1309 // allows us to add optional attributes to a GC log record we |
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1310 // could consider timing and reporting how long we wait in the |
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1311 // following two methods. |
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|
1312 wait_while_free_regions_coming(); |
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1313 // If we start the compaction before the CM threads finish |
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1314 // scanning the root regions we might trip them over as we'll |
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1315 // be moving objects / updating references. So let's wait until |
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1316 // they are done. By telling them to abort, they should complete |
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|
1317 // early. |
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|
1318 _cm->root_regions()->abort(); |
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1319 _cm->root_regions()->wait_until_scan_finished(); |
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1320 append_secondary_free_list_if_not_empty_with_lock(); |
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|
1321 |
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|
1322 gc_prologue(true); |
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1323 increment_total_collections(true /* full gc */); |
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1324 increment_old_marking_cycles_started(); |
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|
1325 |
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|
1326 assert(used() == recalculate_used(), "Should be equal"); |
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|
1327 |
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|
1328 verify_before_gc(); |
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|
1329 |
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
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|
1330 check_bitmaps("Full GC Start"); |
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. |
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
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|
1347 _allocator->release_mutator_alloc_region(); |
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|
1348 _allocator->abandon_gc_alloc_regions(); |
10098
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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 |
20336
6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
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20335
diff
changeset
|
1386 assert(num_free_regions() == 0, "we should not have added any free regions"); |
10098
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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 |
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
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|
1426 print_hrm_post_compaction(); |
10098
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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
194f52aa2f23
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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 | |
10098
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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
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
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|
1480 #ifdef TRACESPINNING |
10098
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|
1481 ParallelTaskTerminator::print_termination_counts(); |
546
05c6d52fa7a9
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diff
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|
1482 #endif |
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diff
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|
1483 |
10098
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|
1484 // Discard all rset updates |
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|
1485 JavaThread::dirty_card_queue_set().abandon_logs(); |
20504
6948da6d7c13
8052172: Evacuation failure handling in G1 does not evacuate all objects if -XX:-G1DeferredRSUpdate is set
tschatzl
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diff
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|
1486 assert(dirty_card_queue_set().completed_buffers_num() == 0, "DCQS should be empty"); |
10098
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|
1487 |
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|
1488 _young_list->reset_sampled_info(); |
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|
1489 // At this point there should be no regions in the |
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|
1490 // entire heap tagged as young. |
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|
1491 assert(check_young_list_empty(true /* check_heap */), |
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|
1492 "young list should be empty at this point"); |
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|
1493 |
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|
1494 // Update the number of full collections that have been completed. |
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|
1495 increment_old_marking_cycles_completed(false /* concurrent */); |
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|
1496 |
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
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20359
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|
1497 _hrm.verify_optional(); |
10098
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|
1498 verify_region_sets_optional(); |
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|
1499 |
10373
3a4805ad0005
8015244: G1: Verification after a full GC is incorrectly placed.
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diff
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|
1500 verify_after_gc(); |
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diff
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|
1501 |
20291
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|
1502 // Clear the previous marking bitmap, if needed for bitmap verification. |
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|
1503 // Note we cannot do this when we clear the next marking bitmap in |
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|
1504 // ConcurrentMark::abort() above since VerifyDuringGC verifies the |
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|
1505 // objects marked during a full GC against the previous bitmap. |
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|
1506 // But we need to clear it before calling check_bitmaps below since |
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|
1507 // the full GC has compacted objects and updated TAMS but not updated |
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|
1508 // the prev bitmap. |
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|
1509 if (G1VerifyBitmaps) { |
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|
1510 ((CMBitMap*) concurrent_mark()->prevMarkBitMap())->clearAll(); |
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|
1511 } |
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|
1512 check_bitmaps("Full GC End"); |
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|
1513 |
10098
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|
1514 // Start a new incremental collection set for the next pause |
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|
1515 assert(g1_policy()->collection_set() == NULL, "must be"); |
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|
1516 g1_policy()->start_incremental_cset_building(); |
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|
1517 |
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|
1518 clear_cset_fast_test(); |
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|
1519 |
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
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20377
diff
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|
1520 _allocator->init_mutator_alloc_region(); |
10098
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|
1521 |
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|
1522 double end = os::elapsedTime(); |
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|
1523 g1_policy()->record_full_collection_end(); |
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|
1524 |
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|
1525 if (G1Log::fine()) { |
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|
1526 g1_policy()->print_heap_transition(); |
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|
1527 } |
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|
1528 |
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|
1529 // We must call G1MonitoringSupport::update_sizes() in the same scoping level |
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|
1530 // as an active TraceMemoryManagerStats object (i.e. before the destructor for the |
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|
1531 // TraceMemoryManagerStats is called) so that the G1 memory pools are updated |
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|
1532 // before any GC notifications are raised. |
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|
1533 g1mm()->update_sizes(); |
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|
1534 |
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|
1535 gc_epilogue(true); |
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|
1536 } |
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|
1537 |
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|
1538 if (G1Log::finer()) { |
10291
48391ab0687e
8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info
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|
1539 g1_policy()->print_detailed_heap_transition(true /* full */); |
10098
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|
1540 } |
6121
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
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6120
diff
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|
1541 |
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diff
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|
1542 print_heap_after_gc(); |
10405 | 1543 trace_heap_after_gc(gc_tracer); |
1544 | |
1545 post_full_gc_dump(gc_timer); | |
1546 | |
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
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13062
diff
changeset
|
1547 gc_timer->register_gc_end(); |
10405 | 1548 gc_tracer->report_gc_end(gc_timer->gc_end(), gc_timer->time_partitions()); |
10098
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|
1549 } |
1973 | 1550 |
1551 return true; | |
342 | 1552 } |
1553 | |
1554 void G1CollectedHeap::do_full_collection(bool clear_all_soft_refs) { | |
1973 | 1555 // do_collection() will return whether it succeeded in performing |
1556 // the GC. Currently, there is no facility on the | |
1557 // do_full_collection() API to notify the caller than the collection | |
1558 // did not succeed (e.g., because it was locked out by the GC | |
1559 // locker). So, right now, we'll ignore the return value. | |
1560 bool dummy = do_collection(true, /* explicit_gc */ | |
1561 clear_all_soft_refs, | |
1562 0 /* word_size */); | |
342 | 1563 } |
1564 | |
1565 // This code is mostly copied from TenuredGeneration. | |
1566 void | |
1567 G1CollectedHeap:: | |
1568 resize_if_necessary_after_full_collection(size_t word_size) { | |
1569 // Include the current allocation, if any, and bytes that will be | |
1570 // pre-allocated to support collections, as "used". | |
1571 const size_t used_after_gc = used(); | |
1572 const size_t capacity_after_gc = capacity(); | |
1573 const size_t free_after_gc = capacity_after_gc - used_after_gc; | |
1574 | |
1717
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
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diff
changeset
|
1575 // This is enforced in arguments.cpp. |
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
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1709
diff
changeset
|
1576 assert(MinHeapFreeRatio <= MaxHeapFreeRatio, |
688c3755d7af
6959014: G1: assert(minimum_desired_capacity <= maximum_desired_capacity) failed: sanity check
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diff
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|
1577 "otherwise the code below doesn't make sense"); |
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1578 |
342 | 1579 // We don't have floating point command-line arguments |
1717
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1580 const double minimum_free_percentage = (double) MinHeapFreeRatio / 100.0; |
342 | 1581 const double maximum_used_percentage = 1.0 - minimum_free_percentage; |
1717
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1582 const double maximum_free_percentage = (double) MaxHeapFreeRatio / 100.0; |
342 | 1583 const double minimum_used_percentage = 1.0 - maximum_free_percentage; |
1584 | |
1717
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1585 const size_t min_heap_size = collector_policy()->min_heap_byte_size(); |
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1586 const size_t max_heap_size = collector_policy()->max_heap_byte_size(); |
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1587 |
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1588 // We have to be careful here as these two calculations can overflow |
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1589 // 32-bit size_t's. |
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1590 double used_after_gc_d = (double) used_after_gc; |
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1591 double minimum_desired_capacity_d = used_after_gc_d / maximum_used_percentage; |
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1592 double maximum_desired_capacity_d = used_after_gc_d / minimum_used_percentage; |
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1593 |
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1594 // Let's make sure that they are both under the max heap size, which |
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1595 // by default will make them fit into a size_t. |
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1596 double desired_capacity_upper_bound = (double) max_heap_size; |
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1597 minimum_desired_capacity_d = MIN2(minimum_desired_capacity_d, |
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1598 desired_capacity_upper_bound); |
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1599 maximum_desired_capacity_d = MIN2(maximum_desired_capacity_d, |
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1600 desired_capacity_upper_bound); |
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1601 |
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1602 // We can now safely turn them into size_t's. |
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1603 size_t minimum_desired_capacity = (size_t) minimum_desired_capacity_d; |
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1604 size_t maximum_desired_capacity = (size_t) maximum_desired_capacity_d; |
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1605 |
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1606 // This assert only makes sense here, before we adjust them |
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1607 // with respect to the min and max heap size. |
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1608 assert(minimum_desired_capacity <= maximum_desired_capacity, |
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1609 err_msg("minimum_desired_capacity = "SIZE_FORMAT", " |
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1610 "maximum_desired_capacity = "SIZE_FORMAT, |
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1611 minimum_desired_capacity, maximum_desired_capacity)); |
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1612 |
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1613 // Should not be greater than the heap max size. No need to adjust |
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1614 // it with respect to the heap min size as it's a lower bound (i.e., |
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1615 // we'll try to make the capacity larger than it, not smaller). |
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1616 minimum_desired_capacity = MIN2(minimum_desired_capacity, max_heap_size); |
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1617 // Should not be less than the heap min size. No need to adjust it |
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1618 // with respect to the heap max size as it's an upper bound (i.e., |
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1619 // we'll try to make the capacity smaller than it, not greater). |
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1620 maximum_desired_capacity = MAX2(maximum_desired_capacity, min_heap_size); |
342 | 1621 |
1717
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1622 if (capacity_after_gc < minimum_desired_capacity) { |
342 | 1623 // Don't expand unless it's significant |
1624 size_t expand_bytes = minimum_desired_capacity - capacity_after_gc; | |
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1625 ergo_verbose4(ErgoHeapSizing, |
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1626 "attempt heap expansion", |
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1627 ergo_format_reason("capacity lower than " |
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1628 "min desired capacity after Full GC") |
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1629 ergo_format_byte("capacity") |
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1630 ergo_format_byte("occupancy") |
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1631 ergo_format_byte_perc("min desired capacity"), |
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1632 capacity_after_gc, used_after_gc, |
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1633 minimum_desired_capacity, (double) MinHeapFreeRatio); |
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1634 expand(expand_bytes); |
342 | 1635 |
1636 // No expansion, now see if we want to shrink | |
1717
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1637 } else if (capacity_after_gc > maximum_desired_capacity) { |
342 | 1638 // Capacity too large, compute shrinking size |
1639 size_t shrink_bytes = capacity_after_gc - maximum_desired_capacity; | |
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1640 ergo_verbose4(ErgoHeapSizing, |
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1641 "attempt heap shrinking", |
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1642 ergo_format_reason("capacity higher than " |
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1643 "max desired capacity after Full GC") |
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1644 ergo_format_byte("capacity") |
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1645 ergo_format_byte("occupancy") |
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1646 ergo_format_byte_perc("max desired capacity"), |
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1647 capacity_after_gc, used_after_gc, |
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1648 maximum_desired_capacity, (double) MaxHeapFreeRatio); |
342 | 1649 shrink(shrink_bytes); |
1650 } | |
1651 } | |
1652 | |
1653 | |
1654 HeapWord* | |
1973 | 1655 G1CollectedHeap::satisfy_failed_allocation(size_t word_size, |
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1656 AllocationContext_t context, |
1973 | 1657 bool* succeeded) { |
2152 | 1658 assert_at_safepoint(true /* should_be_vm_thread */); |
1973 | 1659 |
1660 *succeeded = true; | |
1661 // Let's attempt the allocation first. | |
2433
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1662 HeapWord* result = |
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1663 attempt_allocation_at_safepoint(word_size, |
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1664 context, |
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1665 false /* expect_null_mutator_alloc_region */); |
1973 | 1666 if (result != NULL) { |
1667 assert(*succeeded, "sanity"); | |
1668 return result; | |
1669 } | |
342 | 1670 |
1671 // In a G1 heap, we're supposed to keep allocation from failing by | |
1672 // incremental pauses. Therefore, at least for now, we'll favor | |
1673 // expansion over collection. (This might change in the future if we can | |
1674 // do something smarter than full collection to satisfy a failed alloc.) | |
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1675 result = expand_and_allocate(word_size, context); |
342 | 1676 if (result != NULL) { |
1973 | 1677 assert(*succeeded, "sanity"); |
342 | 1678 return result; |
1679 } | |
1680 | |
1973 | 1681 // Expansion didn't work, we'll try to do a Full GC. |
1682 bool gc_succeeded = do_collection(false, /* explicit_gc */ | |
1683 false, /* clear_all_soft_refs */ | |
1684 word_size); | |
1685 if (!gc_succeeded) { | |
1686 *succeeded = false; | |
1687 return NULL; | |
1688 } | |
1689 | |
1690 // Retry the allocation | |
1691 result = attempt_allocation_at_safepoint(word_size, | |
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1692 context, |
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1693 true /* expect_null_mutator_alloc_region */); |
342 | 1694 if (result != NULL) { |
1973 | 1695 assert(*succeeded, "sanity"); |
342 | 1696 return result; |
1697 } | |
1698 | |
1973 | 1699 // Then, try a Full GC that will collect all soft references. |
1700 gc_succeeded = do_collection(false, /* explicit_gc */ | |
1701 true, /* clear_all_soft_refs */ | |
1702 word_size); | |
1703 if (!gc_succeeded) { | |
1704 *succeeded = false; | |
1705 return NULL; | |
1706 } | |
1707 | |
1708 // Retry the allocation once more | |
1709 result = attempt_allocation_at_safepoint(word_size, | |
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1710 context, |
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1711 true /* expect_null_mutator_alloc_region */); |
342 | 1712 if (result != NULL) { |
1973 | 1713 assert(*succeeded, "sanity"); |
342 | 1714 return result; |
1715 } | |
1716 | |
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1717 assert(!collector_policy()->should_clear_all_soft_refs(), |
1973 | 1718 "Flag should have been handled and cleared prior to this point"); |
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1719 |
342 | 1720 // What else? We might try synchronous finalization later. If the total |
1721 // space available is large enough for the allocation, then a more | |
1722 // complete compaction phase than we've tried so far might be | |
1723 // appropriate. | |
1973 | 1724 assert(*succeeded, "sanity"); |
342 | 1725 return NULL; |
1726 } | |
1727 | |
1728 // Attempting to expand the heap sufficiently | |
1729 // to support an allocation of the given "word_size". If | |
1730 // successful, perform the allocation and return the address of the | |
1731 // allocated block, or else "NULL". | |
1732 | |
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1733 HeapWord* G1CollectedHeap::expand_and_allocate(size_t word_size, AllocationContext_t context) { |
2152 | 1734 assert_at_safepoint(true /* should_be_vm_thread */); |
1735 | |
1736 verify_region_sets_optional(); | |
1973 | 1737 |
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1738 size_t expand_bytes = MAX2(word_size * HeapWordSize, MinHeapDeltaBytes); |
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1739 ergo_verbose1(ErgoHeapSizing, |
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1740 "attempt heap expansion", |
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1741 ergo_format_reason("allocation request failed") |
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1742 ergo_format_byte("allocation request"), |
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1743 word_size * HeapWordSize); |
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1744 if (expand(expand_bytes)) { |
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1745 _hrm.verify_optional(); |
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1746 verify_region_sets_optional(); |
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1747 return attempt_allocation_at_safepoint(word_size, |
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1748 context, |
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1749 false /* expect_null_mutator_alloc_region */); |
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1750 } |
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1751 return NULL; |
342 | 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); |
2188
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1763 |
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1764 if (is_maximal_no_gc()) { |
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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 |
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1771 uint regions_to_expand = (uint)(aligned_expand_bytes / HeapRegion::GrainBytes); |
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1772 assert(regions_to_expand > 0, "Must expand by at least one region"); |
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1773 |
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1774 uint expanded_by = _hrm.expand_by(regions_to_expand); |
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1775 |
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1776 if (expanded_by > 0) { |
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1777 size_t actual_expand_bytes = expanded_by * HeapRegion::GrainBytes; |
3766 | 1778 assert(actual_expand_bytes <= aligned_expand_bytes, "post-condition"); |
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1779 g1_policy()->record_new_heap_size(num_regions()); |
2188
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1780 } else { |
3914
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1781 ergo_verbose0(ErgoHeapSizing, |
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1782 "did not expand the heap", |
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1783 ergo_format_reason("heap expansion operation failed")); |
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1784 // The expansion of the virtual storage space was unsuccessful. |
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1785 // Let's see if it was because we ran out of swap. |
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1786 if (G1ExitOnExpansionFailure && |
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1787 _hrm.available() >= regions_to_expand) { |
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1788 // We had head room... |
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1789 vm_exit_out_of_memory(aligned_expand_bytes, OOM_MMAP_ERROR, "G1 heap expansion"); |
342 | 1790 } |
1791 } | |
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1792 return regions_to_expand > 0; |
342 | 1793 } |
1794 | |
3766 | 1795 void G1CollectedHeap::shrink_helper(size_t shrink_bytes) { |
342 | 1796 size_t aligned_shrink_bytes = |
1797 ReservedSpace::page_align_size_down(shrink_bytes); | |
1798 aligned_shrink_bytes = align_size_down(aligned_shrink_bytes, | |
1799 HeapRegion::GrainBytes); | |
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1800 uint num_regions_to_remove = (uint)(shrink_bytes / HeapRegion::GrainBytes); |
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1801 |
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1802 uint num_regions_removed = _hrm.shrink_by(num_regions_to_remove); |
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1803 size_t shrunk_bytes = num_regions_removed * HeapRegion::GrainBytes; |
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1804 |
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1805 ergo_verbose3(ErgoHeapSizing, |
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1806 "shrink the heap", |
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1807 ergo_format_byte("requested shrinking amount") |
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1808 ergo_format_byte("aligned shrinking amount") |
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1809 ergo_format_byte("attempted shrinking amount"), |
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1810 shrink_bytes, aligned_shrink_bytes, shrunk_bytes); |
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1811 if (num_regions_removed > 0) { |
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1812 g1_policy()->record_new_heap_size(num_regions()); |
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1813 } else { |
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1814 ergo_verbose0(ErgoHeapSizing, |
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1815 "did not shrink the heap", |
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1816 ergo_format_reason("heap shrinking operation failed")); |
342 | 1817 } |
1818 } | |
1819 | |
1820 void G1CollectedHeap::shrink(size_t shrink_bytes) { | |
2152 | 1821 verify_region_sets_optional(); |
1822 | |
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1823 // We should only reach here at the end of a Full GC which means we |
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1824 // should not not be holding to any GC alloc regions. The method |
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1825 // below will make sure of that and do any remaining clean up. |
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1826 _allocator->abandon_gc_alloc_regions(); |
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1827 |
2152 | 1828 // Instead of tearing down / rebuilding the free lists here, we |
1829 // could instead use the remove_all_pending() method on free_list to | |
1830 // remove only the ones that we need to remove. | |
4072 | 1831 tear_down_region_sets(true /* free_list_only */); |
342 | 1832 shrink_helper(shrink_bytes); |
4072 | 1833 rebuild_region_sets(true /* free_list_only */); |
2152 | 1834 |
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1835 _hrm.verify_optional(); |
2152 | 1836 verify_region_sets_optional(); |
342 | 1837 } |
1838 | |
1839 // Public methods. | |
1840 | |
1841 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away | |
1842 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list | |
1843 #endif // _MSC_VER | |
1844 | |
1845 | |
1846 G1CollectedHeap::G1CollectedHeap(G1CollectorPolicy* policy_) : | |
1847 SharedHeap(policy_), | |
1848 _g1_policy(policy_), | |
1111 | 1849 _dirty_card_queue_set(false), |
1705 | 1850 _into_cset_dirty_card_queue_set(false), |
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1851 _is_alive_closure_cm(this), |
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1852 _is_alive_closure_stw(this), |
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1853 _ref_processor_cm(NULL), |
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1854 _ref_processor_stw(NULL), |
342 | 1855 _process_strong_tasks(new SubTasksDone(G1H_PS_NumElements)), |
1856 _bot_shared(NULL), | |
10405 | 1857 _evac_failure_scan_stack(NULL), |
342 | 1858 _mark_in_progress(false), |
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1859 _cg1r(NULL), |
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1860 _g1mm(NULL), |
342 | 1861 _refine_cte_cl(NULL), |
1862 _full_collection(false), | |
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1863 _secondary_free_list("Secondary Free List", new SecondaryFreeRegionListMtSafeChecker()), |
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1864 _old_set("Old Set", false /* humongous */, new OldRegionSetMtSafeChecker()), |
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1865 _humongous_set("Master Humongous Set", true /* humongous */, new HumongousRegionSetMtSafeChecker()), |
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1866 _humongous_is_live(), |
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1867 _has_humongous_reclaim_candidates(false), |
2152 | 1868 _free_regions_coming(false), |
342 | 1869 _young_list(new YoungList(this)), |
1870 _gc_time_stamp(0), | |
6595 | 1871 _survivor_plab_stats(YoungPLABSize, PLABWeight), |
1872 _old_plab_stats(OldPLABSize, PLABWeight), | |
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1873 _expand_heap_after_alloc_failure(true), |
526 | 1874 _surviving_young_words(NULL), |
6120
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1875 _old_marking_cycles_started(0), |
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1876 _old_marking_cycles_completed(0), |
10405 | 1877 _concurrent_cycle_started(false), |
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1878 _in_cset_fast_test(), |
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1879 _dirty_cards_region_list(NULL), |
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1880 _worker_cset_start_region(NULL), |
10405 | 1881 _worker_cset_start_region_time_stamp(NULL), |
1882 _gc_timer_stw(new (ResourceObj::C_HEAP, mtGC) STWGCTimer()), | |
1883 _gc_timer_cm(new (ResourceObj::C_HEAP, mtGC) ConcurrentGCTimer()), | |
1884 _gc_tracer_stw(new (ResourceObj::C_HEAP, mtGC) G1NewTracer()), | |
1885 _gc_tracer_cm(new (ResourceObj::C_HEAP, mtGC) G1OldTracer()) { | |
1886 | |
1887 _g1h = this; | |
342 | 1888 if (_process_strong_tasks == NULL || !_process_strong_tasks->valid()) { |
1889 vm_exit_during_initialization("Failed necessary allocation."); | |
1890 } | |
942
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1891 |
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1892 _allocator = G1Allocator::create_allocator(_g1h); |
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1893 _humongous_object_threshold_in_words = HeapRegion::GrainWords / 2; |
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1894 |
342 | 1895 int n_queues = MAX2((int)ParallelGCThreads, 1); |
1896 _task_queues = new RefToScanQueueSet(n_queues); | |
1897 | |
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1898 uint n_rem_sets = HeapRegionRemSet::num_par_rem_sets(); |
342 | 1899 assert(n_rem_sets > 0, "Invariant."); |
1900 | |
6197 | 1901 _worker_cset_start_region = NEW_C_HEAP_ARRAY(HeapRegion*, n_queues, mtGC); |
1902 _worker_cset_start_region_time_stamp = NEW_C_HEAP_ARRAY(unsigned int, n_queues, mtGC); | |
10405 | 1903 _evacuation_failed_info_array = NEW_C_HEAP_ARRAY(EvacuationFailedInfo, n_queues, mtGC); |
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1904 |
342 | 1905 for (int i = 0; i < n_queues; i++) { |
1906 RefToScanQueue* q = new RefToScanQueue(); | |
1907 q->initialize(); | |
1908 _task_queues->register_queue(i, q); | |
10405 | 1909 ::new (&_evacuation_failed_info_array[i]) EvacuationFailedInfo(); |
1910 } | |
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1911 clear_cset_start_regions(); |
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1912 |
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1913 // Initialize the G1EvacuationFailureALot counters and flags. |
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1914 NOT_PRODUCT(reset_evacuation_should_fail();) |
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1915 |
342 | 1916 guarantee(_task_queues != NULL, "task_queues allocation failure."); |
1917 } | |
1918 | |
1919 jint G1CollectedHeap::initialize() { | |
1166 | 1920 CollectedHeap::pre_initialize(); |
342 | 1921 os::enable_vtime(); |
1922 | |
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1923 G1Log::init(); |
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1924 |
342 | 1925 // Necessary to satisfy locking discipline assertions. |
1926 | |
1927 MutexLocker x(Heap_lock); | |
1928 | |
3778
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1929 // We have to initialize the printer before committing the heap, as |
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1930 // it will be used then. |
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1931 _hr_printer.set_active(G1PrintHeapRegions); |
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1932 |
342 | 1933 // While there are no constraints in the GC code that HeapWordSize |
1934 // be any particular value, there are multiple other areas in the | |
1935 // system which believe this to be true (e.g. oop->object_size in some | |
1936 // cases incorrectly returns the size in wordSize units rather than | |
1937 // HeapWordSize). | |
1938 guarantee(HeapWordSize == wordSize, "HeapWordSize must equal wordSize"); | |
1939 | |
1940 size_t init_byte_size = collector_policy()->initial_heap_byte_size(); | |
1941 size_t max_byte_size = collector_policy()->max_heap_byte_size(); | |
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1942 size_t heap_alignment = collector_policy()->heap_alignment(); |
342 | 1943 |
1944 // Ensure that the sizes are properly aligned. | |
1945 Universe::check_alignment(init_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
1946 Universe::check_alignment(max_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
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1947 Universe::check_alignment(max_byte_size, heap_alignment, "g1 heap"); |
342 | 1948 |
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1949 _refine_cte_cl = new RefineCardTableEntryClosure(); |
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1950 |
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|
1951 _cg1r = new ConcurrentG1Refine(this, _refine_cte_cl); |
342 | 1952 |
1953 // Reserve the maximum. | |
642
660978a2a31a
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1954 |
3824
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|
1955 // When compressed oops are enabled, the preferred heap base |
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|
1956 // is calculated by subtracting the requested size from the |
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1957 // 32Gb boundary and using the result as the base address for |
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|
1958 // heap reservation. If the requested size is not aligned to |
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|
1959 // HeapRegion::GrainBytes (i.e. the alignment that is passed |
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|
1960 // into the ReservedHeapSpace constructor) then the actual |
6aa4feb8a366
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|
1961 // base of the reserved heap may end up differing from the |
6aa4feb8a366
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|
1962 // address that was requested (i.e. the preferred heap base). |
6aa4feb8a366
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|
1963 // If this happens then we could end up using a non-optimal |
6aa4feb8a366
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|
1964 // compressed oops mode. |
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|
1965 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
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|
1966 ReservedSpace heap_rs = Universe::reserve_heap(max_byte_size, |
12110
4c84d351cca9
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
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12082
diff
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|
1967 heap_alignment); |
342 | 1968 |
1969 // It is important to do this in a way such that concurrent readers can't | |
10405 | 1970 // temporarily think something is in the heap. (I've actually seen this |
342 | 1971 // happen in asserts: DLD.) |
1972 _reserved.set_word_size(0); | |
1973 _reserved.set_start((HeapWord*)heap_rs.base()); | |
1974 _reserved.set_end((HeapWord*)(heap_rs.base() + heap_rs.size())); | |
1975 | |
1976 // Create the gen rem set (and barrier set) for the entire reserved region. | |
1977 _rem_set = collector_policy()->create_rem_set(_reserved, 2); | |
1978 set_barrier_set(rem_set()->bs()); | |
12343 | 1979 if (!barrier_set()->is_a(BarrierSet::G1SATBCTLogging)) { |
1980 vm_exit_during_initialization("G1 requires a G1SATBLoggingCardTableModRefBS"); | |
342 | 1981 return JNI_ENOMEM; |
1982 } | |
1983 | |
1984 // Also create a G1 rem set. | |
12343 | 1985 _g1_rem_set = new G1RemSet(this, g1_barrier_set()); |
342 | 1986 |
1987 // Carve out the G1 part of the heap. | |
1988 | |
20336
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|
1989 ReservedSpace g1_rs = heap_rs.first_part(max_byte_size); |
20337 | 1990 G1RegionToSpaceMapper* heap_storage = |
1991 G1RegionToSpaceMapper::create_mapper(g1_rs, | |
1992 UseLargePages ? os::large_page_size() : os::vm_page_size(), | |
1993 HeapRegion::GrainBytes, | |
1994 1, | |
1995 mtJavaHeap); | |
1996 heap_storage->set_mapping_changed_listener(&_listener); | |
1997 | |
1998 // Reserve space for the block offset table. We do not support automatic uncommit | |
1999 // for the card table at this time. BOT only. | |
2000 ReservedSpace bot_rs(G1BlockOffsetSharedArray::compute_size(g1_rs.size() / HeapWordSize)); | |
2001 G1RegionToSpaceMapper* bot_storage = | |
2002 G1RegionToSpaceMapper::create_mapper(bot_rs, | |
2003 os::vm_page_size(), | |
2004 HeapRegion::GrainBytes, | |
2005 G1BlockOffsetSharedArray::N_bytes, | |
2006 mtGC); | |
2007 | |
2008 ReservedSpace cardtable_rs(G1SATBCardTableLoggingModRefBS::compute_size(g1_rs.size() / HeapWordSize)); | |
2009 G1RegionToSpaceMapper* cardtable_storage = | |
2010 G1RegionToSpaceMapper::create_mapper(cardtable_rs, | |
2011 os::vm_page_size(), | |
2012 HeapRegion::GrainBytes, | |
2013 G1BlockOffsetSharedArray::N_bytes, | |
2014 mtGC); | |
2015 | |
2016 // Reserve space for the card counts table. | |
2017 ReservedSpace card_counts_rs(G1BlockOffsetSharedArray::compute_size(g1_rs.size() / HeapWordSize)); | |
2018 G1RegionToSpaceMapper* card_counts_storage = | |
2019 G1RegionToSpaceMapper::create_mapper(card_counts_rs, | |
2020 os::vm_page_size(), | |
2021 HeapRegion::GrainBytes, | |
2022 G1BlockOffsetSharedArray::N_bytes, | |
2023 mtGC); | |
2024 | |
2025 // Reserve space for prev and next bitmap. | |
2026 size_t bitmap_size = CMBitMap::compute_size(g1_rs.size()); | |
2027 | |
2028 ReservedSpace prev_bitmap_rs(ReservedSpace::allocation_align_size_up(bitmap_size)); | |
2029 G1RegionToSpaceMapper* prev_bitmap_storage = | |
2030 G1RegionToSpaceMapper::create_mapper(prev_bitmap_rs, | |
2031 os::vm_page_size(), | |
2032 HeapRegion::GrainBytes, | |
2033 CMBitMap::mark_distance(), | |
2034 mtGC); | |
2035 | |
2036 ReservedSpace next_bitmap_rs(ReservedSpace::allocation_align_size_up(bitmap_size)); | |
2037 G1RegionToSpaceMapper* next_bitmap_storage = | |
2038 G1RegionToSpaceMapper::create_mapper(next_bitmap_rs, | |
2039 os::vm_page_size(), | |
2040 HeapRegion::GrainBytes, | |
2041 CMBitMap::mark_distance(), | |
2042 mtGC); | |
2043 | |
20377
a8ea2f110d87
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20359
diff
changeset
|
2044 _hrm.initialize(heap_storage, prev_bitmap_storage, next_bitmap_storage, bot_storage, cardtable_storage, card_counts_storage); |
20337 | 2045 g1_barrier_set()->initialize(cardtable_storage); |
2046 // Do later initialization work for concurrent refinement. | |
2047 _cg1r->init(card_counts_storage); | |
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2048 |
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
changeset
|
2049 // 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
|
2050 // in the remembered set structures. |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2051 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
|
2052 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
|
2053 |
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
johnc
parents:
796
diff
changeset
|
2054 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
|
2055 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
|
2056 guarantee(HeapRegion::CardsPerRegion < max_cards_per_region, |
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
tonyp
parents:
941
diff
changeset
|
2057 "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
|
2058 |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
2059 FreeRegionList::set_unrealistically_long_length(max_regions() + 1); |
2152 | 2060 |
20337 | 2061 _bot_shared = new G1BlockOffsetSharedArray(_reserved, bot_storage); |
342 | 2062 |
2063 _g1h = this; | |
2064 | |
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
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20359
diff
changeset
|
2065 _in_cset_fast_test.initialize(_hrm.reserved().start(), _hrm.reserved().end(), HeapRegion::GrainBytes); |
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
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20359
diff
changeset
|
2066 _humongous_is_live.initialize(_hrm.reserved().start(), _hrm.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
|
2067 |
342 | 2068 // Create the ConcurrentMark data structure and thread. |
2069 // (Must do this late, so that "max_regions" is defined.) | |
20337 | 2070 _cm = new ConcurrentMark(this, prev_bitmap_storage, next_bitmap_storage); |
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2071 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
|
2072 vm_shutdown_during_initialization("Could not create/initialize ConcurrentMark"); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
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7207
diff
changeset
|
2073 return JNI_ENOMEM; |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2074 } |
342 | 2075 _cmThread = _cm->cmThread(); |
2076 | |
2077 // Initialize the from_card cache structure of HeapRegionRemSet. | |
2078 HeapRegionRemSet::init_heap(max_regions()); | |
2079 | |
677 | 2080 // Now expand into the initial heap size. |
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
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2173
diff
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|
2081 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
|
2082 vm_shutdown_during_initialization("Failed to allocate initial heap."); |
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
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|
2083 return JNI_ENOMEM; |
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2084 } |
342 | 2085 |
2086 // Perform any initialization actions delegated to the policy. | |
2087 g1_policy()->init(); | |
2088 | |
2089 JavaThread::satb_mark_queue_set().initialize(SATB_Q_CBL_mon, | |
2090 SATB_Q_FL_lock, | |
1111 | 2091 G1SATBProcessCompletedThreshold, |
342 | 2092 Shared_SATB_Q_lock); |
794 | 2093 |
20216
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
2094 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
|
2095 DirtyCardQ_CBL_mon, |
794 | 2096 DirtyCardQ_FL_lock, |
1111 | 2097 concurrent_g1_refine()->yellow_zone(), |
2098 concurrent_g1_refine()->red_zone(), | |
794 | 2099 Shared_DirtyCardQ_lock); |
2100 | |
20504
6948da6d7c13
8052172: Evacuation failure handling in G1 does not evacuate all objects if -XX:-G1DeferredRSUpdate is set
tschatzl
parents:
20503
diff
changeset
|
2101 dirty_card_queue_set().initialize(NULL, // Should never be called by the Java code |
6948da6d7c13
8052172: Evacuation failure handling in G1 does not evacuate all objects if -XX:-G1DeferredRSUpdate is set
tschatzl
parents:
20503
diff
changeset
|
2102 DirtyCardQ_CBL_mon, |
6948da6d7c13
8052172: Evacuation failure handling in G1 does not evacuate all objects if -XX:-G1DeferredRSUpdate is set
tschatzl
parents:
20503
diff
changeset
|
2103 DirtyCardQ_FL_lock, |
6948da6d7c13
8052172: Evacuation failure handling in G1 does not evacuate all objects if -XX:-G1DeferredRSUpdate is set
tschatzl
parents:
20503
diff
changeset
|
2104 -1, // never trigger processing |
6948da6d7c13
8052172: Evacuation failure handling in G1 does not evacuate all objects if -XX:-G1DeferredRSUpdate is set
tschatzl
parents:
20503
diff
changeset
|
2105 -1, // no limit on length |
6948da6d7c13
8052172: Evacuation failure handling in G1 does not evacuate all objects if -XX:-G1DeferredRSUpdate is set
tschatzl
parents:
20503
diff
changeset
|
2106 Shared_DirtyCardQ_lock, |
6948da6d7c13
8052172: Evacuation failure handling in G1 does not evacuate all objects if -XX:-G1DeferredRSUpdate is set
tschatzl
parents:
20503
diff
changeset
|
2107 &JavaThread::dirty_card_queue_set()); |
1705 | 2108 |
2109 // Initialize the card queue set used to hold cards containing | |
2110 // references into the collection set. | |
20216
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
2111 _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
|
2112 DirtyCardQ_CBL_mon, |
1705 | 2113 DirtyCardQ_FL_lock, |
2114 -1, // never trigger processing | |
2115 -1, // no limit on length | |
2116 Shared_DirtyCardQ_lock, | |
2117 &JavaThread::dirty_card_queue_set()); | |
2118 | |
342 | 2119 // In case we're keeping closure specialization stats, initialize those |
2120 // counts and that mechanism. | |
2121 SpecializationStats::clear(); | |
2122 | |
20336
6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
20335
diff
changeset
|
2123 // Here we allocate the dummy HeapRegion that is required by the |
6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
20335
diff
changeset
|
2124 // G1AllocRegion class. |
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
2125 HeapRegion* dummy_region = _hrm.get_dummy_region(); |
20337 | 2126 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2127 // We'll re-use the same region whether the alloc region will |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
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2432
diff
changeset
|
2128 // 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
|
2129 // region will complain that it cannot support allocations without |
20481
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
2130 // BOT updates. So we'll tag the dummy region as eden to avoid that. |
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
2131 dummy_region->set_eden(); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2132 // Make sure it's full. |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2133 dummy_region->set_top(dummy_region->end()); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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2432
diff
changeset
|
2134 G1AllocRegion::setup(this, dummy_region); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
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2432
diff
changeset
|
2135 |
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
2136 _allocator->init_mutator_alloc_region(); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2137 |
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
2138 // 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
|
2139 // values in the heap have been properly initialized. |
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
2140 _g1mm = new G1MonitoringSupport(this); |
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
2141 |
17764 | 2142 G1StringDedup::initialize(); |
2143 | |
342 | 2144 return JNI_OK; |
2145 } | |
2146 | |
17947
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
17937
diff
changeset
|
2147 void G1CollectedHeap::stop() { |
17992 | 2148 // Stop all concurrent threads. We do this to make sure these threads |
2149 // 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
|
2150 // that are destroyed during shutdown. |
17992 | 2151 _cg1r->stop(); |
2152 _cmThread->stop(); | |
2153 if (G1StringDedup::is_enabled()) { | |
2154 G1StringDedup::stop(); | |
2155 } | |
17947
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
17937
diff
changeset
|
2156 } |
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
17937
diff
changeset
|
2157 |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
2158 void G1CollectedHeap::clear_humongous_is_live_table() { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
2159 guarantee(G1ReclaimDeadHumongousObjectsAtYoungGC, "Should only be called if true"); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
2160 _humongous_is_live.clear(); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
2161 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
2162 |
12233
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2163 size_t G1CollectedHeap::conservative_max_heap_alignment() { |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2164 return HeapRegion::max_region_size(); |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2165 } |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2166 |
342 | 2167 void G1CollectedHeap::ref_processing_init() { |
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
2168 // Reference processing in G1 currently works as follows: |
fd1d227ef1b9
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2169 // |
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2170 // * There are two reference processor instances. One is |
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2171 // used to record and process discovered references |
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2172 // during concurrent marking; the other is used to |
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2173 // record and process references during STW pauses |
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2174 // (both full and incremental). |
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2175 // * Both ref processors need to 'span' the entire heap as |
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2176 // the regions in the collection set may be dotted around. |
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2177 // |
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2178 // * For the concurrent marking ref processor: |
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2179 // * Reference discovery is enabled at initial marking. |
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2180 // * Reference discovery is disabled and the discovered |
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2181 // references processed etc during remarking. |
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2182 // * Reference discovery is MT (see below). |
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2183 // * Reference discovery requires a barrier (see below). |
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2184 // * Reference processing may or may not be MT |
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2185 // (depending on the value of ParallelRefProcEnabled |
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2186 // and ParallelGCThreads). |
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2187 // * A full GC disables reference discovery by the CM |
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2188 // ref processor and abandons any entries on it's |
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2189 // discovered lists. |
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2190 // |
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2191 // * For the STW processor: |
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2192 // * Non MT discovery is enabled at the start of a full GC. |
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2193 // * Processing and enqueueing during a full GC is non-MT. |
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2194 // * During a full GC, references are processed after marking. |
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2195 // |
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2196 // * Discovery (may or may not be MT) is enabled at the start |
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2197 // of an incremental evacuation pause. |
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2198 // * References are processed near the end of a STW evacuation pause. |
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2199 // * For both types of GC: |
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2200 // * Discovery is atomic - i.e. not concurrent. |
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2201 // * Reference discovery will not need a barrier. |
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2202 |
342 | 2203 SharedHeap::ref_processing_init(); |
2204 MemRegion mr = reserved_region(); | |
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2205 |
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2206 // Concurrent Mark ref processor |
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2207 _ref_processor_cm = |
2369
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2208 new ReferenceProcessor(mr, // span |
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2209 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
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2210 // mt processing |
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2211 (int) ParallelGCThreads, |
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2212 // degree of mt processing |
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2213 (ParallelGCThreads > 1) || (ConcGCThreads > 1), |
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2214 // mt discovery |
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|
2215 (int) MAX2(ParallelGCThreads, ConcGCThreads), |
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2216 // degree of mt discovery |
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|
2217 false, |
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|
2218 // Reference discovery is not atomic |
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2219 &_is_alive_closure_cm); |
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2220 // is alive closure |
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|
2221 // (for efficiency/performance) |
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|
2222 |
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|
2223 // STW ref processor |
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|
2224 _ref_processor_stw = |
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|
2225 new ReferenceProcessor(mr, // span |
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|
2226 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
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|
2227 // mt processing |
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|
2228 MAX2((int)ParallelGCThreads, 1), |
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|
2229 // degree of mt processing |
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|
2230 (ParallelGCThreads > 1), |
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|
2231 // mt discovery |
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|
2232 MAX2((int)ParallelGCThreads, 1), |
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|
2233 // degree of mt discovery |
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|
2234 true, |
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|
2235 // Reference discovery is atomic |
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|
2236 &_is_alive_closure_stw); |
3979
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|
2237 // is alive closure |
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|
2238 // (for efficiency/performance) |
342 | 2239 } |
2240 | |
2241 size_t G1CollectedHeap::capacity() const { | |
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2242 return _hrm.length() * HeapRegion::GrainBytes; |
342 | 2243 } |
2244 | |
6254
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2245 void G1CollectedHeap::reset_gc_time_stamps(HeapRegion* hr) { |
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2246 assert(!hr->continuesHumongous(), "pre-condition"); |
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2247 hr->reset_gc_time_stamp(); |
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2248 if (hr->startsHumongous()) { |
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|
2249 uint first_index = hr->hrm_index() + 1; |
6254
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|
2250 uint last_index = hr->last_hc_index(); |
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|
2251 for (uint i = first_index; i < last_index; i += 1) { |
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2252 HeapRegion* chr = region_at(i); |
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|
2253 assert(chr->continuesHumongous(), "sanity"); |
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2254 chr->reset_gc_time_stamp(); |
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|
2255 } |
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|
2256 } |
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|
2257 } |
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|
2258 |
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|
2259 #ifndef PRODUCT |
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|
2260 class CheckGCTimeStampsHRClosure : public HeapRegionClosure { |
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|
2261 private: |
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|
2262 unsigned _gc_time_stamp; |
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|
2263 bool _failures; |
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|
2264 |
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|
2265 public: |
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|
2266 CheckGCTimeStampsHRClosure(unsigned gc_time_stamp) : |
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2267 _gc_time_stamp(gc_time_stamp), _failures(false) { } |
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|
2268 |
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|
2269 virtual bool doHeapRegion(HeapRegion* hr) { |
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2270 unsigned region_gc_time_stamp = hr->get_gc_time_stamp(); |
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2271 if (_gc_time_stamp != region_gc_time_stamp) { |
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2272 gclog_or_tty->print_cr("Region "HR_FORMAT" has GC time stamp = %d, " |
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2273 "expected %d", HR_FORMAT_PARAMS(hr), |
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2274 region_gc_time_stamp, _gc_time_stamp); |
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|
2275 _failures = true; |
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|
2276 } |
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|
2277 return false; |
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|
2278 } |
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|
2279 |
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|
2280 bool failures() { return _failures; } |
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|
2281 }; |
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|
2282 |
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2283 void G1CollectedHeap::check_gc_time_stamps() { |
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2284 CheckGCTimeStampsHRClosure cl(_gc_time_stamp); |
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|
2285 heap_region_iterate(&cl); |
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|
2286 guarantee(!cl.failures(), "all GC time stamps should have been reset"); |
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|
2287 } |
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|
2288 #endif // PRODUCT |
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|
2289 |
1705 | 2290 void G1CollectedHeap::iterate_dirty_card_closure(CardTableEntryClosure* cl, |
2291 DirtyCardQueue* into_cset_dcq, | |
2292 bool concurrent, | |
17844
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|
2293 uint worker_i) { |
889 | 2294 // Clean cards in the hot card cache |
10246
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|
2295 G1HotCardCache* hot_card_cache = _cg1r->hot_card_cache(); |
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|
2296 hot_card_cache->drain(worker_i, g1_rem_set(), into_cset_dcq); |
889 | 2297 |
342 | 2298 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); |
2299 int n_completed_buffers = 0; | |
1705 | 2300 while (dcqs.apply_closure_to_completed_buffer(cl, worker_i, 0, true)) { |
342 | 2301 n_completed_buffers++; |
2302 } | |
6628
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|
2303 g1_policy()->phase_times()->record_update_rs_processed_buffers(worker_i, n_completed_buffers); |
342 | 2304 dcqs.clear_n_completed_buffers(); |
2305 assert(!dcqs.completed_buffers_exist_dirty(), "Completed buffers exist!"); | |
2306 } | |
2307 | |
2308 | |
2309 // Computes the sum of the storage used by the various regions. | |
2310 size_t G1CollectedHeap::used() const { | |
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227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
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|
2311 return _allocator->used(); |
342 | 2312 } |
2313 | |
846
42d84bbbecf4
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|
2314 size_t G1CollectedHeap::used_unlocked() const { |
20404
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8057536: Refactor G1 to allow context specific allocations
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20377
diff
changeset
|
2315 return _allocator->used_unlocked(); |
846
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2316 } |
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
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845
diff
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|
2317 |
342 | 2318 class SumUsedClosure: public HeapRegionClosure { |
2319 size_t _used; | |
2320 public: | |
2321 SumUsedClosure() : _used(0) {} | |
2322 bool doHeapRegion(HeapRegion* r) { | |
2323 if (!r->continuesHumongous()) { | |
2324 _used += r->used(); | |
2325 } | |
2326 return false; | |
2327 } | |
2328 size_t result() { return _used; } | |
2329 }; | |
2330 | |
2331 size_t G1CollectedHeap::recalculate_used() const { | |
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
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17756
diff
changeset
|
2332 double recalculate_used_start = os::elapsedTime(); |
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
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|
2333 |
342 | 2334 SumUsedClosure blk; |
3766 | 2335 heap_region_iterate(&blk); |
17757
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8035654: Add times for evacuation failure handling in "Other" time
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|
2336 |
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
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17756
diff
changeset
|
2337 g1_policy()->phase_times()->record_evac_fail_recalc_used_time((os::elapsedTime() - recalculate_used_start) * 1000.0); |
342 | 2338 return blk.result(); |
2339 } | |
2340 | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
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|
2341 bool G1CollectedHeap::should_do_concurrent_full_gc(GCCause::Cause cause) { |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2342 switch (cause) { |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
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diff
changeset
|
2343 case GCCause::_gc_locker: return GCLockerInvokesConcurrent; |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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4875
diff
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|
2344 case GCCause::_java_lang_system_gc: return ExplicitGCInvokesConcurrent; |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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diff
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|
2345 case GCCause::_g1_humongous_allocation: return true; |
20522
d3fd73295885
8059466: Force young GC to initiate marking cycle when stat update is requested
sjohanss
parents:
20504
diff
changeset
|
2346 case GCCause::_update_allocation_context_stats_inc: return true; |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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parents:
4875
diff
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|
2347 default: return false; |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
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4875
diff
changeset
|
2348 } |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
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changeset
|
2349 } |
4e5661ba9d98
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|
2350 |
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
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parents:
2433
diff
changeset
|
2351 #ifndef PRODUCT |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2352 void G1CollectedHeap::allocate_dummy_regions() { |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
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2433
diff
changeset
|
2353 // Let's fill up most of the region |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2354 size_t word_size = HeapRegion::GrainWords - 1024; |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
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parents:
2433
diff
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|
2355 // And as a result the region we'll allocate will be humongous. |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2356 guarantee(isHumongous(word_size), "sanity"); |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2357 |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
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parents:
2433
diff
changeset
|
2358 for (uintx i = 0; i < G1DummyRegionsPerGC; ++i) { |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
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|
2359 // Let's use the existing mechanism for the allocation |
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
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parents:
20377
diff
changeset
|
2360 HeapWord* dummy_obj = humongous_obj_allocate(word_size, |
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
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20377
diff
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|
2361 AllocationContext::system()); |
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2362 if (dummy_obj != NULL) { |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2363 MemRegion mr(dummy_obj, word_size); |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2364 CollectedHeap::fill_with_object(mr); |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2365 } else { |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2366 // 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
|
2367 // again. Let's get out of the loop. |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2368 break; |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2369 } |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2370 } |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2371 } |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2372 #endif // !PRODUCT |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2373 |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2374 void G1CollectedHeap::increment_old_marking_cycles_started() { |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
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6109
diff
changeset
|
2375 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
|
2376 _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
|
2377 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
|
2378 _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
|
2379 |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2380 _old_marking_cycles_started++; |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2381 } |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2382 |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2383 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
|
2384 MonitorLockerEx x(FullGCCount_lock, Mutex::_no_safepoint_check_flag); |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2385 |
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2386 // 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
|
2387 // 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
|
2388 // 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
|
2389 // assert here. |
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2390 |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2391 // 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
|
2392 // 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
|
2393 // interrupt a concurrent cycle), the number of full collections |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2394 // 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
|
2395 // 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
|
2396 // behind the number of full collections started. |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2397 |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2398 // 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
|
2399 assert(concurrent || |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2400 (_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
|
2401 (_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
|
2402 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
|
2403 "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
|
2404 _old_marking_cycles_started, _old_marking_cycles_completed)); |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2405 |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2406 // 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
|
2407 assert(!concurrent || |
6120
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 + 1), |
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2409 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
|
2410 "_old_marking_cycles_started = %u " |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2411 "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
|
2412 _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
|
2413 |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2414 _old_marking_cycles_completed += 1; |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2415 |
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2416 // 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
|
2417 // we wake up any waiters (especially when ExplicitInvokesConcurrent |
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2418 // is set) so that if a waiter requests another System.gc() it doesn't |
10405 | 2419 // 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
|
2420 if (concurrent) { |
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2421 _cmThread->clear_in_progress(); |
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2422 } |
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2423 |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2424 // 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
|
2425 // System.gc() with (with ExplicitGCInvokesConcurrent set or not) |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2426 // 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
|
2427 // waiting in VM_G1IncCollectionPause::doit_epilogue(). |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2428 FullGCCount_lock->notify_all(); |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2429 } |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2430 |
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
2431 void G1CollectedHeap::register_concurrent_cycle_start(const Ticks& start_time) { |
10405 | 2432 _concurrent_cycle_started = true; |
2433 _gc_timer_cm->register_gc_start(start_time); | |
2434 | |
2435 _gc_tracer_cm->report_gc_start(gc_cause(), _gc_timer_cm->gc_start()); | |
2436 trace_heap_before_gc(_gc_tracer_cm); | |
2437 } | |
2438 | |
2439 void G1CollectedHeap::register_concurrent_cycle_end() { | |
2440 if (_concurrent_cycle_started) { | |
2441 if (_cm->has_aborted()) { | |
2442 _gc_tracer_cm->report_concurrent_mode_failure(); | |
2443 } | |
12179
f175e3678be2
8020692: TestGCEventMixed.java failed because of timestamp in event after end event
ehelin
parents:
12116
diff
changeset
|
2444 |
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
2445 _gc_timer_cm->register_gc_end(); |
10405 | 2446 _gc_tracer_cm->report_gc_end(_gc_timer_cm->gc_end(), _gc_timer_cm->time_partitions()); |
2447 | |
2448 _concurrent_cycle_started = false; | |
2449 } | |
2450 } | |
2451 | |
2452 void G1CollectedHeap::trace_heap_after_concurrent_cycle() { | |
2453 if (_concurrent_cycle_started) { | |
2454 trace_heap_after_gc(_gc_tracer_cm); | |
2455 } | |
2456 } | |
2457 | |
2458 G1YCType G1CollectedHeap::yc_type() { | |
2459 bool is_young = g1_policy()->gcs_are_young(); | |
2460 bool is_initial_mark = g1_policy()->during_initial_mark_pause(); | |
2461 bool is_during_mark = mark_in_progress(); | |
2462 | |
2463 if (is_initial_mark) { | |
2464 return InitialMark; | |
2465 } else if (is_during_mark) { | |
2466 return DuringMark; | |
2467 } else if (is_young) { | |
2468 return Normal; | |
2469 } else { | |
2470 return Mixed; | |
2471 } | |
2472 } | |
2473 | |
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2474 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
|
2475 assert_heap_not_locked(); |
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2476 |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2477 unsigned int gc_count_before; |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2478 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
|
2479 bool retry_gc; |
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|
2480 |
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|
2481 do { |
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|
2482 retry_gc = false; |
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|
2483 |
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|
2484 { |
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|
2485 MutexLocker ml(Heap_lock); |
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|
2486 |
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|
2487 // Read the GC count while holding the Heap_lock |
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2488 gc_count_before = total_collections(); |
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2489 old_marking_count_before = _old_marking_cycles_started; |
4910
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2490 } |
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|
2491 |
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2492 if (should_do_concurrent_full_gc(cause)) { |
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2493 // Schedule an initial-mark evacuation pause that will start a |
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2494 // concurrent cycle. We're setting word_size to 0 which means that |
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2495 // we are not requesting a post-GC allocation. |
1656
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6944166: G1: explicit GCs are not always handled correctly
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2496 VM_G1IncCollectionPause op(gc_count_before, |
1973 | 2497 0, /* word_size */ |
4910
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2498 true, /* should_initiate_conc_mark */ |
1656
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|
2499 g1_policy()->max_pause_time_ms(), |
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|
2500 cause); |
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227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
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|
2501 op.set_allocation_context(AllocationContext::current()); |
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
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2502 |
1088
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|
2503 VMThread::execute(&op); |
4910
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2504 if (!op.pause_succeeded()) { |
6120
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2505 if (old_marking_count_before == _old_marking_cycles_started) { |
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
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2506 retry_gc = op.should_retry_gc(); |
4910
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2507 } else { |
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2508 // A Full GC happened while we were trying to schedule the |
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2509 // initial-mark GC. No point in starting a new cycle given |
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2510 // that the whole heap was collected anyway. |
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|
2511 } |
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|
2512 |
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|
2513 if (retry_gc) { |
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
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|
2514 if (GC_locker::is_active_and_needs_gc()) { |
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7147724: G1: hang in SurrogateLockerThread::manipulatePLL
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|
2515 GC_locker::stall_until_clear(); |
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|
2516 } |
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|
2517 } |
4910
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|
2518 } |
1656
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|
2519 } else { |
20357
4bfc44ba0d19
8055098: WB API should be extended to provide information about size and age of object.
tschatzl
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diff
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|
2520 if (cause == GCCause::_gc_locker || cause == GCCause::_wb_young_gc |
4910
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|
2521 DEBUG_ONLY(|| cause == GCCause::_scavenge_alot)) { |
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|
2522 |
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|
2523 // Schedule a standard evacuation pause. We're setting word_size |
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|
2524 // to 0 which means that we are not requesting a post-GC allocation. |
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|
2525 VM_G1IncCollectionPause op(gc_count_before, |
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|
2526 0, /* word_size */ |
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|
2527 false, /* should_initiate_conc_mark */ |
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|
2528 g1_policy()->max_pause_time_ms(), |
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|
2529 cause); |
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|
2530 VMThread::execute(&op); |
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|
2531 } else { |
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|
2532 // Schedule a Full GC. |
6120
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brutisso
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|
2533 VM_G1CollectFull op(gc_count_before, old_marking_count_before, cause); |
4910
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|
2534 VMThread::execute(&op); |
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|
2535 } |
1088
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|
2536 } |
4910
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|
2537 } while (retry_gc); |
342 | 2538 } |
2539 | |
2540 bool G1CollectedHeap::is_in(const void* p) const { | |
20377
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8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
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20359
diff
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|
2541 if (_hrm.reserved().contains(p)) { |
20337 | 2542 // Given that we know that p is in the reserved space, |
4708 | 2543 // heap_region_containing_raw() should successfully |
2544 // return the containing region. | |
2545 HeapRegion* hr = heap_region_containing_raw(p); | |
342 | 2546 return hr->is_in(p); |
2547 } else { | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
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|
2548 return false; |
342 | 2549 } |
2550 } | |
2551 | |
20337 | 2552 #ifdef ASSERT |
2553 bool G1CollectedHeap::is_in_exact(const void* p) const { | |
2554 bool contains = reserved_region().contains(p); | |
20377
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20359
diff
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|
2555 bool available = _hrm.is_available(addr_to_region((HeapWord*)p)); |
20337 | 2556 if (contains && available) { |
2557 return true; | |
2558 } else { | |
2559 return false; | |
2560 } | |
2561 } | |
2562 #endif | |
2563 | |
342 | 2564 // Iteration functions. |
2565 | |
20309
a08bb8e45ba1
8054341: Remove some obsolete code in G1CollectedHeap class
tschatzl
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20307
diff
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|
2566 // Applies an ExtendedOopClosure onto all references of objects within a HeapRegion. |
342 | 2567 |
2568 class IterateOopClosureRegionClosure: public HeapRegionClosure { | |
6725
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diff
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|
2569 ExtendedOopClosure* _cl; |
342 | 2570 public: |
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tschatzl
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diff
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|
2571 IterateOopClosureRegionClosure(ExtendedOopClosure* cl) : _cl(cl) {} |
342 | 2572 bool doHeapRegion(HeapRegion* r) { |
6254
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7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
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diff
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|
2573 if (!r->continuesHumongous()) { |
342 | 2574 r->oop_iterate(_cl); |
2575 } | |
2576 return false; | |
2577 } | |
2578 }; | |
2579 | |
6725
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coleenp
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diff
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|
2580 void G1CollectedHeap::oop_iterate(ExtendedOopClosure* cl) { |
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|
2581 IterateOopClosureRegionClosure blk(cl); |
3766 | 2582 heap_region_iterate(&blk); |
342 | 2583 } |
2584 | |
2585 // Iterates an ObjectClosure over all objects within a HeapRegion. | |
2586 | |
2587 class IterateObjectClosureRegionClosure: public HeapRegionClosure { | |
2588 ObjectClosure* _cl; | |
2589 public: | |
2590 IterateObjectClosureRegionClosure(ObjectClosure* cl) : _cl(cl) {} | |
2591 bool doHeapRegion(HeapRegion* r) { | |
2592 if (! r->continuesHumongous()) { | |
2593 r->object_iterate(_cl); | |
2594 } | |
2595 return false; | |
2596 } | |
2597 }; | |
2598 | |
6725
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coleenp
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|
2599 void G1CollectedHeap::object_iterate(ObjectClosure* cl) { |
342 | 2600 IterateObjectClosureRegionClosure blk(cl); |
3766 | 2601 heap_region_iterate(&blk); |
342 | 2602 } |
2603 | |
2604 // Calls a SpaceClosure on a HeapRegion. | |
2605 | |
2606 class SpaceClosureRegionClosure: public HeapRegionClosure { | |
2607 SpaceClosure* _cl; | |
2608 public: | |
2609 SpaceClosureRegionClosure(SpaceClosure* cl) : _cl(cl) {} | |
2610 bool doHeapRegion(HeapRegion* r) { | |
2611 _cl->do_space(r); | |
2612 return false; | |
2613 } | |
2614 }; | |
2615 | |
2616 void G1CollectedHeap::space_iterate(SpaceClosure* cl) { | |
2617 SpaceClosureRegionClosure blk(cl); | |
3766 | 2618 heap_region_iterate(&blk); |
342 | 2619 } |
2620 | |
3766 | 2621 void G1CollectedHeap::heap_region_iterate(HeapRegionClosure* cl) const { |
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|
2622 _hrm.iterate(cl); |
342 | 2623 } |
2624 | |
2625 void | |
2626 G1CollectedHeap::heap_region_par_iterate_chunked(HeapRegionClosure* cl, | |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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|
2627 uint worker_id, |
20336
6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
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20335
diff
changeset
|
2628 uint num_workers, |
6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
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diff
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|
2629 jint claim_value) const { |
20377
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diff
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|
2630 _hrm.par_iterate(cl, worker_id, num_workers, claim_value); |
355 | 2631 } |
2632 | |
390 | 2633 class ResetClaimValuesClosure: public HeapRegionClosure { |
2634 public: | |
2635 bool doHeapRegion(HeapRegion* r) { | |
2636 r->set_claim_value(HeapRegion::InitialClaimValue); | |
2637 return false; | |
2638 } | |
2639 }; | |
2640 | |
4783
023652e49ac0
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|
2641 void G1CollectedHeap::reset_heap_region_claim_values() { |
390 | 2642 ResetClaimValuesClosure blk; |
2643 heap_region_iterate(&blk); | |
2644 } | |
2645 | |
4783
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|
2646 void G1CollectedHeap::reset_cset_heap_region_claim_values() { |
023652e49ac0
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|
2647 ResetClaimValuesClosure blk; |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
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diff
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|
2648 collection_set_iterate(&blk); |
023652e49ac0
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diff
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|
2649 } |
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|
2650 |
355 | 2651 #ifdef ASSERT |
2652 // This checks whether all regions in the heap have the correct claim | |
2653 // value. I also piggy-backed on this a check to ensure that the | |
2654 // humongous_start_region() information on "continues humongous" | |
2655 // regions is correct. | |
2656 | |
2657 class CheckClaimValuesClosure : public HeapRegionClosure { | |
2658 private: | |
2659 jint _claim_value; | |
6010
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|
2660 uint _failures; |
355 | 2661 HeapRegion* _sh_region; |
6010
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|
2662 |
355 | 2663 public: |
2664 CheckClaimValuesClosure(jint claim_value) : | |
2665 _claim_value(claim_value), _failures(0), _sh_region(NULL) { } | |
2666 bool doHeapRegion(HeapRegion* r) { | |
2667 if (r->claim_value() != _claim_value) { | |
4097
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2668 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
355 | 2669 "claim value = %d, should be %d", |
4097
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|
2670 HR_FORMAT_PARAMS(r), |
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diff
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|
2671 r->claim_value(), _claim_value); |
355 | 2672 ++_failures; |
2673 } | |
2674 if (!r->isHumongous()) { | |
2675 _sh_region = NULL; | |
2676 } else if (r->startsHumongous()) { | |
2677 _sh_region = r; | |
2678 } else if (r->continuesHumongous()) { | |
2679 if (r->humongous_start_region() != _sh_region) { | |
4097
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|
2680 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
355 | 2681 "HS = "PTR_FORMAT", should be "PTR_FORMAT, |
4097
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|
2682 HR_FORMAT_PARAMS(r), |
355 | 2683 r->humongous_start_region(), |
2684 _sh_region); | |
2685 ++_failures; | |
342 | 2686 } |
2687 } | |
355 | 2688 return false; |
2689 } | |
6010
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|
2690 uint failures() { return _failures; } |
355 | 2691 }; |
2692 | |
2693 bool G1CollectedHeap::check_heap_region_claim_values(jint claim_value) { | |
2694 CheckClaimValuesClosure cl(claim_value); | |
2695 heap_region_iterate(&cl); | |
2696 return cl.failures() == 0; | |
2697 } | |
4097
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|
2698 |
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|
2699 class CheckClaimValuesInCSetHRClosure: public HeapRegionClosure { |
6010
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|
2700 private: |
720b6a76dd9d
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|
2701 jint _claim_value; |
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|
2702 uint _failures; |
4097
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4095
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|
2703 |
dc467e8b2c5e
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4095
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|
2704 public: |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
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4095
diff
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|
2705 CheckClaimValuesInCSetHRClosure(jint claim_value) : |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2706 _claim_value(claim_value), _failures(0) { } |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2707 |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2708 uint failures() { return _failures; } |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2709 |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2710 bool doHeapRegion(HeapRegion* hr) { |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2711 assert(hr->in_collection_set(), "how?"); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2712 assert(!hr->isHumongous(), "H-region in CSet"); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2713 if (hr->claim_value() != _claim_value) { |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2714 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
|
2715 "claim value = %d, should be %d", |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2716 HR_FORMAT_PARAMS(hr), |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2717 hr->claim_value(), _claim_value); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2718 _failures += 1; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2719 } |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
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parents:
4095
diff
changeset
|
2720 return false; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2721 } |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2722 }; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2723 |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2724 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
|
2725 CheckClaimValuesInCSetHRClosure cl(claim_value); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2726 collection_set_iterate(&cl); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2727 return cl.failures() == 0; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2728 } |
355 | 2729 #endif // ASSERT |
342 | 2730 |
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2731 // 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
|
2732 // 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
|
2733 void G1CollectedHeap::clear_cset_start_regions() { |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2734 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
|
2735 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
|
2736 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2737 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
|
2738 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
|
2739 _worker_cset_start_region[i] = NULL; |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2740 _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
|
2741 } |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2742 } |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2743 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2744 // 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
|
2745 // 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
|
2746 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
|
2747 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
|
2748 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2749 HeapRegion* result = NULL; |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2750 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
|
2751 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2752 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
|
2753 // 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
|
2754 // 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
|
2755 // 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
|
2756 // (when the collection set is empty). |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2757 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
|
2758 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
|
2759 return result; |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2760 } |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2761 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2762 // 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
|
2763 // 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
|
2764 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2765 // 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
|
2766 // 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
|
2767 // avoid contention. |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2768 // If we have: |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2769 // n collection set regions |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2770 // p threads |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2771 // 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
|
2772 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2773 result = g1_policy()->collection_set(); |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2774 if (G1CollectedHeap::use_parallel_gc_threads()) { |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2775 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
|
2776 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
|
2777 assert(UseDynamicNumberOfGCThreads || |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2778 active_workers == workers()->total_workers(), |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2779 "Unless dynamic should use total workers"); |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2780 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2781 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
|
2782 uint start_ind = 0; |
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2783 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2784 if (worker_i > 0 && |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2785 _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
|
2786 // Previous workers starting region is valid |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2787 // so let's iterate from there |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2788 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
|
2789 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
|
2790 } |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2791 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2792 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
|
2793 result = result->next_in_collection_set(); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2794 } |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2795 } |
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2796 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2797 // 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
|
2798 // (when the collection set is empty). |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2799 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
|
2800 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
|
2801 "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
|
2802 _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
|
2803 OrderAccess::storestore(); |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2804 _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
|
2805 return result; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2806 } |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2807 |
342 | 2808 void G1CollectedHeap::collection_set_iterate(HeapRegionClosure* cl) { |
2809 HeapRegion* r = g1_policy()->collection_set(); | |
2810 while (r != NULL) { | |
2811 HeapRegion* next = r->next_in_collection_set(); | |
2812 if (cl->doHeapRegion(r)) { | |
2813 cl->incomplete(); | |
2814 return; | |
2815 } | |
2816 r = next; | |
2817 } | |
2818 } | |
2819 | |
2820 void G1CollectedHeap::collection_set_iterate_from(HeapRegion* r, | |
2821 HeapRegionClosure *cl) { | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2822 if (r == NULL) { |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2823 // 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
|
2824 return; |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2825 } |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2826 |
342 | 2827 assert(r->in_collection_set(), |
2828 "Start region must be a member of the collection set."); | |
2829 HeapRegion* cur = r; | |
2830 while (cur != NULL) { | |
2831 HeapRegion* next = cur->next_in_collection_set(); | |
2832 if (cl->doHeapRegion(cur) && false) { | |
2833 cl->incomplete(); | |
2834 return; | |
2835 } | |
2836 cur = next; | |
2837 } | |
2838 cur = g1_policy()->collection_set(); | |
2839 while (cur != r) { | |
2840 HeapRegion* next = cur->next_in_collection_set(); | |
2841 if (cl->doHeapRegion(cur) && false) { | |
2842 cl->incomplete(); | |
2843 return; | |
2844 } | |
2845 cur = next; | |
2846 } | |
2847 } | |
2848 | |
20304
a22acf6d7598
8048112: G1 Full GC needs to support the case when the very first region is not available
tschatzl
parents:
20282
diff
changeset
|
2849 HeapRegion* G1CollectedHeap::next_compaction_region(const HeapRegion* from) const { |
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
2850 HeapRegion* result = _hrm.next_region_in_heap(from); |
20336
6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
20335
diff
changeset
|
2851 while (result != NULL && result->isHumongous()) { |
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
2852 result = _hrm.next_region_in_heap(result); |
20336
6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
20335
diff
changeset
|
2853 } |
6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
20335
diff
changeset
|
2854 return result; |
20304
a22acf6d7598
8048112: G1 Full GC needs to support the case when the very first region is not available
tschatzl
parents:
20282
diff
changeset
|
2855 } |
342 | 2856 |
2857 Space* G1CollectedHeap::space_containing(const void* addr) const { | |
20335
eec72fa4b108
8040722: G1: Clean up usages of heap_region_containing
brutisso
parents:
20334
diff
changeset
|
2858 return heap_region_containing(addr); |
342 | 2859 } |
2860 | |
2861 HeapWord* G1CollectedHeap::block_start(const void* addr) const { | |
2862 Space* sp = space_containing(addr); | |
20335
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2863 return sp->block_start(addr); |
342 | 2864 } |
2865 | |
2866 size_t G1CollectedHeap::block_size(const HeapWord* addr) const { | |
2867 Space* sp = space_containing(addr); | |
2868 return sp->block_size(addr); | |
2869 } | |
2870 | |
2871 bool G1CollectedHeap::block_is_obj(const HeapWord* addr) const { | |
2872 Space* sp = space_containing(addr); | |
2873 return sp->block_is_obj(addr); | |
2874 } | |
2875 | |
2876 bool G1CollectedHeap::supports_tlab_allocation() const { | |
2877 return true; | |
2878 } | |
2879 | |
2880 size_t G1CollectedHeap::tlab_capacity(Thread* ignored) const { | |
17727 | 2881 return (_g1_policy->young_list_target_length() - young_list()->survivor_length()) * HeapRegion::GrainBytes; |
2882 } | |
2883 | |
2884 size_t G1CollectedHeap::tlab_used(Thread* ignored) const { | |
2885 return young_list()->eden_used_bytes(); | |
2886 } | |
2887 | |
2888 // For G1 TLABs should not contain humongous objects, so the maximum TLAB size | |
2889 // must be smaller than the humongous object limit. | |
2890 size_t G1CollectedHeap::max_tlab_size() const { | |
2891 return align_size_down(_humongous_object_threshold_in_words - 1, MinObjAlignment); | |
342 | 2892 } |
2893 | |
2894 size_t G1CollectedHeap::unsafe_max_tlab_alloc(Thread* ignored) const { | |
2895 // Return the remaining space in the cur alloc region, but not less than | |
2896 // the min TLAB size. | |
1313
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2897 |
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|
2898 // Also, this value can be at most the humongous object threshold, |
10405 | 2899 // since we can't allow tlabs to grow big enough to accommodate |
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2900 // humongous objects. |
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2901 |
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|
2902 HeapRegion* hr = _allocator->mutator_alloc_region(AllocationContext::current())->get(); |
17727 | 2903 size_t max_tlab = max_tlab_size() * wordSize; |
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2904 if (hr == NULL) { |
17727 | 2905 return max_tlab; |
342 | 2906 } else { |
17727 | 2907 return MIN2(MAX2(hr->free(), (size_t) MinTLABSize), max_tlab); |
342 | 2908 } |
2909 } | |
2910 | |
2911 size_t G1CollectedHeap::max_capacity() const { | |
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2912 return _hrm.reserved().byte_size(); |
342 | 2913 } |
2914 | |
2915 jlong G1CollectedHeap::millis_since_last_gc() { | |
2916 // assert(false, "NYI"); | |
2917 return 0; | |
2918 } | |
2919 | |
2920 void G1CollectedHeap::prepare_for_verify() { | |
2921 if (SafepointSynchronize::is_at_safepoint() || ! UseTLAB) { | |
2922 ensure_parsability(false); | |
2923 } | |
2924 g1_rem_set()->prepare_for_verify(); | |
2925 } | |
2926 | |
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2927 bool G1CollectedHeap::allocated_since_marking(oop obj, HeapRegion* hr, |
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2928 VerifyOption vo) { |
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2929 switch (vo) { |
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2930 case VerifyOption_G1UsePrevMarking: |
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2931 return hr->obj_allocated_since_prev_marking(obj); |
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2932 case VerifyOption_G1UseNextMarking: |
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2933 return hr->obj_allocated_since_next_marking(obj); |
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2934 case VerifyOption_G1UseMarkWord: |
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2935 return false; |
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|
2936 default: |
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|
2937 ShouldNotReachHere(); |
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|
2938 } |
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2939 return false; // keep some compilers happy |
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|
2940 } |
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2941 |
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2942 HeapWord* G1CollectedHeap::top_at_mark_start(HeapRegion* hr, VerifyOption vo) { |
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2943 switch (vo) { |
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2944 case VerifyOption_G1UsePrevMarking: return hr->prev_top_at_mark_start(); |
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2945 case VerifyOption_G1UseNextMarking: return hr->next_top_at_mark_start(); |
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2946 case VerifyOption_G1UseMarkWord: return NULL; |
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2947 default: ShouldNotReachHere(); |
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|
2948 } |
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2949 return NULL; // keep some compilers happy |
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|
2950 } |
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2951 |
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2952 bool G1CollectedHeap::is_marked(oop obj, VerifyOption vo) { |
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2953 switch (vo) { |
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2954 case VerifyOption_G1UsePrevMarking: return isMarkedPrev(obj); |
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2955 case VerifyOption_G1UseNextMarking: return isMarkedNext(obj); |
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2956 case VerifyOption_G1UseMarkWord: return obj->is_gc_marked(); |
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2957 default: ShouldNotReachHere(); |
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|
2958 } |
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2959 return false; // keep some compilers happy |
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|
2960 } |
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|
2961 |
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2962 const char* G1CollectedHeap::top_at_mark_start_str(VerifyOption vo) { |
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2963 switch (vo) { |
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|
2964 case VerifyOption_G1UsePrevMarking: return "PTAMS"; |
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2965 case VerifyOption_G1UseNextMarking: return "NTAMS"; |
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2966 case VerifyOption_G1UseMarkWord: return "NONE"; |
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2967 default: ShouldNotReachHere(); |
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|
2968 } |
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|
2969 return NULL; // keep some compilers happy |
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|
2970 } |
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|
2971 |
17636
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|
2972 class VerifyRootsClosure: public OopClosure { |
12080 | 2973 private: |
2974 G1CollectedHeap* _g1h; | |
2975 VerifyOption _vo; | |
2976 bool _failures; | |
2977 public: | |
2978 // _vo == UsePrevMarking -> use "prev" marking information, | |
2979 // _vo == UseNextMarking -> use "next" marking information, | |
2980 // _vo == UseMarkWord -> use mark word from object header. | |
2981 VerifyRootsClosure(VerifyOption vo) : | |
2982 _g1h(G1CollectedHeap::heap()), | |
2983 _vo(vo), | |
2984 _failures(false) { } | |
2985 | |
2986 bool failures() { return _failures; } | |
2987 | |
2988 template <class T> void do_oop_nv(T* p) { | |
2989 T heap_oop = oopDesc::load_heap_oop(p); | |
2990 if (!oopDesc::is_null(heap_oop)) { | |
2991 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
2992 if (_g1h->is_obj_dead_cond(obj, _vo)) { | |
2993 gclog_or_tty->print_cr("Root location "PTR_FORMAT" " | |
2994 "points to dead obj "PTR_FORMAT, p, (void*) obj); | |
2995 if (_vo == VerifyOption_G1UseMarkWord) { | |
2996 gclog_or_tty->print_cr(" Mark word: "PTR_FORMAT, (void*)(obj->mark())); | |
2997 } | |
2998 obj->print_on(gclog_or_tty); | |
2999 _failures = true; | |
3000 } | |
3001 } | |
3002 } | |
3003 | |
3004 void do_oop(oop* p) { do_oop_nv(p); } | |
3005 void do_oop(narrowOop* p) { do_oop_nv(p); } | |
3006 }; | |
3007 | |
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3008 class G1VerifyCodeRootOopClosure: public OopClosure { |
12080 | 3009 G1CollectedHeap* _g1h; |
3010 OopClosure* _root_cl; | |
3011 nmethod* _nm; | |
3012 VerifyOption _vo; | |
3013 bool _failures; | |
3014 | |
3015 template <class T> void do_oop_work(T* p) { | |
3016 // First verify that this root is live | |
3017 _root_cl->do_oop(p); | |
3018 | |
3019 if (!G1VerifyHeapRegionCodeRoots) { | |
3020 // We're not verifying the code roots attached to heap region. | |
3021 return; | |
3022 } | |
3023 | |
3024 // Don't check the code roots during marking verification in a full GC | |
3025 if (_vo == VerifyOption_G1UseMarkWord) { | |
3026 return; | |
3027 } | |
3028 | |
3029 // Now verify that the current nmethod (which contains p) is | |
3030 // in the code root list of the heap region containing the | |
3031 // object referenced by p. | |
3032 | |
3033 T heap_oop = oopDesc::load_heap_oop(p); | |
3034 if (!oopDesc::is_null(heap_oop)) { | |
3035 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
3036 | |
3037 // Now fetch the region containing the object | |
3038 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
3039 HeapRegionRemSet* hrrs = hr->rem_set(); | |
3040 // Verify that the strong code root list for this region | |
3041 // contains the nmethod | |
3042 if (!hrrs->strong_code_roots_list_contains(_nm)) { | |
3043 gclog_or_tty->print_cr("Code root location "PTR_FORMAT" " | |
3044 "from nmethod "PTR_FORMAT" not in strong " | |
3045 "code roots for region ["PTR_FORMAT","PTR_FORMAT")", | |
3046 p, _nm, hr->bottom(), hr->end()); | |
3047 _failures = true; | |
3048 } | |
3049 } | |
3050 } | |
3051 | |
3052 public: | |
3053 G1VerifyCodeRootOopClosure(G1CollectedHeap* g1h, OopClosure* root_cl, VerifyOption vo): | |
3054 _g1h(g1h), _root_cl(root_cl), _vo(vo), _nm(NULL), _failures(false) {} | |
3055 | |
3056 void do_oop(oop* p) { do_oop_work(p); } | |
3057 void do_oop(narrowOop* p) { do_oop_work(p); } | |
3058 | |
3059 void set_nmethod(nmethod* nm) { _nm = nm; } | |
3060 bool failures() { return _failures; } | |
3061 }; | |
3062 | |
3063 class G1VerifyCodeRootBlobClosure: public CodeBlobClosure { | |
3064 G1VerifyCodeRootOopClosure* _oop_cl; | |
3065 | |
3066 public: | |
3067 G1VerifyCodeRootBlobClosure(G1VerifyCodeRootOopClosure* oop_cl): | |
3068 _oop_cl(oop_cl) {} | |
3069 | |
3070 void do_code_blob(CodeBlob* cb) { | |
3071 nmethod* nm = cb->as_nmethod_or_null(); | |
3072 if (nm != NULL) { | |
3073 _oop_cl->set_nmethod(nm); | |
3074 nm->oops_do(_oop_cl); | |
3075 } | |
3076 } | |
3077 }; | |
3078 | |
3079 class YoungRefCounterClosure : public OopClosure { | |
3080 G1CollectedHeap* _g1h; | |
3081 int _count; | |
3082 public: | |
3083 YoungRefCounterClosure(G1CollectedHeap* g1h) : _g1h(g1h), _count(0) {} | |
3084 void do_oop(oop* p) { if (_g1h->is_in_young(*p)) { _count++; } } | |
3085 void do_oop(narrowOop* p) { ShouldNotReachHere(); } | |
3086 | |
3087 int count() { return _count; } | |
3088 void reset_count() { _count = 0; }; | |
3089 }; | |
3090 | |
3091 class VerifyKlassClosure: public KlassClosure { | |
3092 YoungRefCounterClosure _young_ref_counter_closure; | |
3093 OopClosure *_oop_closure; | |
3094 public: | |
3095 VerifyKlassClosure(G1CollectedHeap* g1h, OopClosure* cl) : _young_ref_counter_closure(g1h), _oop_closure(cl) {} | |
3096 void do_klass(Klass* k) { | |
3097 k->oops_do(_oop_closure); | |
3098 | |
3099 _young_ref_counter_closure.reset_count(); | |
3100 k->oops_do(&_young_ref_counter_closure); | |
3101 if (_young_ref_counter_closure.count() > 0) { | |
3102 guarantee(k->has_modified_oops(), err_msg("Klass %p, has young refs but is not dirty.", k)); | |
3103 } | |
3104 } | |
3105 }; | |
3106 | |
342 | 3107 class VerifyLivenessOopClosure: public OopClosure { |
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3108 G1CollectedHeap* _g1h; |
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3109 VerifyOption _vo; |
342 | 3110 public: |
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3111 VerifyLivenessOopClosure(G1CollectedHeap* g1h, VerifyOption vo): |
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3112 _g1h(g1h), _vo(vo) |
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|
3113 { } |
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|
3114 void do_oop(narrowOop *p) { do_oop_work(p); } |
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3115 void do_oop( oop *p) { do_oop_work(p); } |
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|
3116 |
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|
3117 template <class T> void do_oop_work(T *p) { |
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3118 oop obj = oopDesc::load_decode_heap_oop(p); |
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|
3119 guarantee(obj == NULL || !_g1h->is_obj_dead_cond(obj, _vo), |
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|
3120 "Dead object referenced by a not dead object"); |
342 | 3121 } |
3122 }; | |
3123 | |
3124 class VerifyObjsInRegionClosure: public ObjectClosure { | |
811 | 3125 private: |
342 | 3126 G1CollectedHeap* _g1h; |
3127 size_t _live_bytes; | |
3128 HeapRegion *_hr; | |
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changeset
|
3129 VerifyOption _vo; |
342 | 3130 public: |
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|
3131 // _vo == UsePrevMarking -> use "prev" marking information, |
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|
3132 // _vo == UseNextMarking -> use "next" marking information, |
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|
3133 // _vo == UseMarkWord -> use mark word from object header. |
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|
3134 VerifyObjsInRegionClosure(HeapRegion *hr, VerifyOption vo) |
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3135 : _live_bytes(0), _hr(hr), _vo(vo) { |
342 | 3136 _g1h = G1CollectedHeap::heap(); |
3137 } | |
3138 void do_object(oop o) { | |
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3139 VerifyLivenessOopClosure isLive(_g1h, _vo); |
342 | 3140 assert(o != NULL, "Huh?"); |
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3141 if (!_g1h->is_obj_dead_cond(o, _vo)) { |
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3142 // If the object is alive according to the mark word, |
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|
3143 // then verify that the marking information agrees. |
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|
3144 // Note we can't verify the contra-positive of the |
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|
3145 // above: if the object is dead (according to the mark |
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|
3146 // word), it may not be marked, or may have been marked |
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|
3147 // but has since became dead, or may have been allocated |
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|
3148 // since the last marking. |
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|
3149 if (_vo == VerifyOption_G1UseMarkWord) { |
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3150 guarantee(!_g1h->is_obj_dead(o), "mark word and concurrent mark mismatch"); |
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|
3151 } |
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|
3152 |
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|
3153 o->oop_iterate_no_header(&isLive); |
1389
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|
3154 if (!_hr->obj_allocated_since_prev_marking(o)) { |
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3155 size_t obj_size = o->size(); // Make sure we don't overflow |
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3156 _live_bytes += (obj_size * HeapWordSize); |
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|
3157 } |
342 | 3158 } |
3159 } | |
3160 size_t live_bytes() { return _live_bytes; } | |
3161 }; | |
3162 | |
3163 class PrintObjsInRegionClosure : public ObjectClosure { | |
3164 HeapRegion *_hr; | |
3165 G1CollectedHeap *_g1; | |
3166 public: | |
3167 PrintObjsInRegionClosure(HeapRegion *hr) : _hr(hr) { | |
3168 _g1 = G1CollectedHeap::heap(); | |
3169 }; | |
3170 | |
3171 void do_object(oop o) { | |
3172 if (o != NULL) { | |
3173 HeapWord *start = (HeapWord *) o; | |
3174 size_t word_sz = o->size(); | |
3175 gclog_or_tty->print("\nPrinting obj "PTR_FORMAT" of size " SIZE_FORMAT | |
3176 " isMarkedPrev %d isMarkedNext %d isAllocSince %d\n", | |
3177 (void*) o, word_sz, | |
3178 _g1->isMarkedPrev(o), | |
3179 _g1->isMarkedNext(o), | |
3180 _hr->obj_allocated_since_prev_marking(o)); | |
3181 HeapWord *end = start + word_sz; | |
3182 HeapWord *cur; | |
3183 int *val; | |
3184 for (cur = start; cur < end; cur++) { | |
3185 val = (int *) cur; | |
3186 gclog_or_tty->print("\t "PTR_FORMAT":"PTR_FORMAT"\n", val, *val); | |
3187 } | |
3188 } | |
3189 } | |
3190 }; | |
3191 | |
3192 class VerifyRegionClosure: public HeapRegionClosure { | |
811 | 3193 private: |
6254
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3194 bool _par; |
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3195 VerifyOption _vo; |
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3196 bool _failures; |
811 | 3197 public: |
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3198 // _vo == UsePrevMarking -> use "prev" marking information, |
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3199 // _vo == UseNextMarking -> use "next" marking information, |
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3200 // _vo == UseMarkWord -> use mark word from object header. |
6008 | 3201 VerifyRegionClosure(bool par, VerifyOption vo) |
3202 : _par(par), | |
3772
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|
3203 _vo(vo), |
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3204 _failures(false) {} |
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|
3205 |
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|
3206 bool failures() { |
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|
3207 return _failures; |
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|
3208 } |
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|
3209 |
342 | 3210 bool doHeapRegion(HeapRegion* r) { |
637
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|
3211 if (!r->continuesHumongous()) { |
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|
3212 bool failures = false; |
6008 | 3213 r->verify(_vo, &failures); |
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|
3214 if (failures) { |
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|
3215 _failures = true; |
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|
3216 } else { |
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|
3217 VerifyObjsInRegionClosure not_dead_yet_cl(r, _vo); |
1020
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|
3218 r->object_iterate(¬_dead_yet_cl); |
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3219 if (_vo != VerifyOption_G1UseNextMarking) { |
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|
3220 if (r->max_live_bytes() < not_dead_yet_cl.live_bytes()) { |
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|
3221 gclog_or_tty->print_cr("["PTR_FORMAT","PTR_FORMAT"] " |
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|
3222 "max_live_bytes "SIZE_FORMAT" " |
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|
3223 "< calculated "SIZE_FORMAT, |
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diff
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|
3224 r->bottom(), r->end(), |
2ace1c4ee8da
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|
3225 r->max_live_bytes(), |
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|
3226 not_dead_yet_cl.live_bytes()); |
4787
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|
3227 _failures = true; |
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diff
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|
3228 } |
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diff
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|
3229 } else { |
2ace1c4ee8da
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diff
changeset
|
3230 // When vo == UseNextMarking we cannot currently do a sanity |
2ace1c4ee8da
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diff
changeset
|
3231 // check on the live bytes as the calculation has not been |
2ace1c4ee8da
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diff
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|
3232 // finalized yet. |
1020
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|
3233 } |
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|
3234 } |
342 | 3235 } |
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|
3236 return false; // stop the region iteration if we hit a failure |
342 | 3237 } |
3238 }; | |
3239 | |
12080 | 3240 // This is the task used for parallel verification of the heap regions |
390 | 3241 |
3242 class G1ParVerifyTask: public AbstractGangTask { | |
3243 private: | |
3244 G1CollectedHeap* _g1h; | |
3772
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|
3245 VerifyOption _vo; |
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|
3246 bool _failures; |
390 | 3247 |
3248 public: | |
3772
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|
3249 // _vo == UsePrevMarking -> use "prev" marking information, |
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|
3250 // _vo == UseNextMarking -> use "next" marking information, |
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|
3251 // _vo == UseMarkWord -> use mark word from object header. |
6008 | 3252 G1ParVerifyTask(G1CollectedHeap* g1h, VerifyOption vo) : |
390 | 3253 AbstractGangTask("Parallel verify task"), |
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|
3254 _g1h(g1h), |
3772
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|
3255 _vo(vo), |
1020
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|
3256 _failures(false) { } |
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|
3257 |
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|
3258 bool failures() { |
ff2402f6a50b
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diff
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|
3259 return _failures; |
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|
3260 } |
390 | 3261 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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4711
diff
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|
3262 void work(uint worker_id) { |
637
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6817419: G1: Enable extensive verification for humongous regions
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diff
changeset
|
3263 HandleMark hm; |
6008 | 3264 VerifyRegionClosure blk(true, _vo); |
4728
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7121618: Change type of number of GC workers to unsigned int.
jmasa
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4711
diff
changeset
|
3265 _g1h->heap_region_par_iterate_chunked(&blk, worker_id, |
4095
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diff
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|
3266 _g1h->workers()->active_workers(), |
390 | 3267 HeapRegion::ParVerifyClaimValue); |
1020
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|
3268 if (blk.failures()) { |
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diff
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|
3269 _failures = true; |
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diff
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|
3270 } |
390 | 3271 } |
3272 }; | |
3273 | |
12080 | 3274 void G1CollectedHeap::verify(bool silent, VerifyOption vo) { |
8855
24ef5fb05e0f
8010463: G1: Crashes with -UseTLAB and heap verification
johnc
parents:
8853
diff
changeset
|
3275 if (SafepointSynchronize::is_at_safepoint()) { |
12080 | 3276 assert(Thread::current()->is_VM_thread(), |
3277 "Expected to be executed serially by the VM thread at this point"); | |
3278 | |
6725
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|
3279 if (!silent) { gclog_or_tty->print("Roots "); } |
3772
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|
3280 VerifyRootsClosure rootsCl(vo); |
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|
3281 VerifyKlassClosure klassCl(this, &rootsCl); |
20278
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8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
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|
3282 CLDToKlassAndOopClosure cldCl(&klassCl, &rootsCl, false); |
3772
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|
3283 |
3293
1f4413413144
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3289
diff
changeset
|
3284 // We apply the relevant closures to all the oops in the |
20278
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stefank
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20274
diff
changeset
|
3285 // system dictionary, class loader data graph, the string table |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
3286 // and the nmethods in the code cache. |
20257
7426d8d76305
8034761: Remove the do_code_roots parameter from process_strong_roots
stefank
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20256
diff
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|
3287 G1VerifyCodeRootOopClosure codeRootsCl(this, &rootsCl, vo); |
7426d8d76305
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stefank
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20256
diff
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|
3288 G1VerifyCodeRootBlobClosure blobsCl(&codeRootsCl); |
20278
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stefank
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20274
diff
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|
3289 |
2c6ef90f030a
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diff
changeset
|
3290 process_all_roots(true, // activate StrongRootsScope |
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diff
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|
3291 SO_AllCodeCache, // roots scanning options |
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diff
changeset
|
3292 &rootsCl, |
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diff
changeset
|
3293 &cldCl, |
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diff
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|
3294 &blobsCl); |
20257
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diff
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|
3295 |
12080 | 3296 bool failures = rootsCl.failures() || codeRootsCl.failures(); |
3772
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|
3297 |
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|
3298 if (vo != VerifyOption_G1UseMarkWord) { |
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|
3299 // If we're verifying during a full GC then the region sets |
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|
3300 // will have been torn down at the start of the GC. Therefore |
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|
3301 // verifying the region sets will fail. So we only verify |
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|
3302 // the region sets when not in a full GC. |
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changeset
|
3303 if (!silent) { gclog_or_tty->print("HeapRegionSets "); } |
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|
3304 verify_region_sets(); |
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|
3305 } |
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|
3306 |
2152 | 3307 if (!silent) { gclog_or_tty->print("HeapRegions "); } |
390 | 3308 if (GCParallelVerificationEnabled && ParallelGCThreads > 1) { |
3309 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
3310 "sanity check"); | |
3311 | |
6008 | 3312 G1ParVerifyTask task(this, vo); |
4095
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|
3313 assert(UseDynamicNumberOfGCThreads || |
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|
3314 workers()->active_workers() == workers()->total_workers(), |
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|
3315 "If not dynamic should be using all the workers"); |
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|
3316 int n_workers = workers()->active_workers(); |
390 | 3317 set_par_threads(n_workers); |
3318 workers()->run_task(&task); | |
3319 set_par_threads(0); | |
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|
3320 if (task.failures()) { |
ff2402f6a50b
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|
3321 failures = true; |
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|
3322 } |
390 | 3323 |
4095
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|
3324 // Checks that the expected amount of parallel work was done. |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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|
3325 // The implication is that n_workers is > 0. |
390 | 3326 assert(check_heap_region_claim_values(HeapRegion::ParVerifyClaimValue), |
3327 "sanity check"); | |
3328 | |
3329 reset_heap_region_claim_values(); | |
3330 | |
3331 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
3332 "sanity check"); | |
3333 } else { | |
6008 | 3334 VerifyRegionClosure blk(false, vo); |
3766 | 3335 heap_region_iterate(&blk); |
1020
ff2402f6a50b
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diff
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|
3336 if (blk.failures()) { |
ff2402f6a50b
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parents:
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|
3337 failures = true; |
ff2402f6a50b
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diff
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|
3338 } |
390 | 3339 } |
2152 | 3340 if (!silent) gclog_or_tty->print("RemSet "); |
342 | 3341 rem_set()->verify(); |
1020
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|
3342 |
17764 | 3343 if (G1StringDedup::is_enabled()) { |
3344 if (!silent) gclog_or_tty->print("StrDedup "); | |
3345 G1StringDedup::verify(); | |
3346 } | |
3347 | |
1020
ff2402f6a50b
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|
3348 if (failures) { |
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|
3349 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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|
3350 // 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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|
3351 // 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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|
3352 // print_extended_on() instead of print_on(). |
53074c2c4600
7099849: G1: include heap region information in hs_err files
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|
3353 print_extended_on(gclog_or_tty); |
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17935
diff
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|
3354 gclog_or_tty->cr(); |
1547
fb1a39993f69
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
1545
diff
changeset
|
3355 #ifndef PRODUCT |
1044 | 3356 if (VerifyDuringGC && G1VerifyDuringGCPrintReachable) { |
1388 | 3357 concurrent_mark()->print_reachable("at-verification-failure", |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3358 vo, false /* all */); |
1020
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|
3359 } |
1547
fb1a39993f69
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jcoomes
parents:
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diff
changeset
|
3360 #endif |
1020
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|
3361 gclog_or_tty->flush(); |
ff2402f6a50b
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diff
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|
3362 } |
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|
3363 guarantee(!failures, "there should not have been any failures"); |
342 | 3364 } else { |
17764 | 3365 if (!silent) { |
3366 gclog_or_tty->print("(SKIPPING Roots, HeapRegionSets, HeapRegions, RemSet"); | |
3367 if (G1StringDedup::is_enabled()) { | |
3368 gclog_or_tty->print(", StrDedup"); | |
3369 } | |
3370 gclog_or_tty->print(") "); | |
3371 } | |
342 | 3372 } |
3373 } | |
3374 | |
12080 | 3375 void G1CollectedHeap::verify(bool silent) { |
3376 verify(silent, VerifyOption_G1UsePrevMarking); | |
3377 } | |
3378 | |
3379 double G1CollectedHeap::verify(bool guard, const char* msg) { | |
3380 double verify_time_ms = 0.0; | |
3381 | |
3382 if (guard && total_collections() >= VerifyGCStartAt) { | |
3383 double verify_start = os::elapsedTime(); | |
3384 HandleMark hm; // Discard invalid handles created during verification | |
3385 prepare_for_verify(); | |
3386 Universe::verify(VerifyOption_G1UsePrevMarking, msg); | |
3387 verify_time_ms = (os::elapsedTime() - verify_start) * 1000; | |
3388 } | |
3389 | |
3390 return verify_time_ms; | |
3391 } | |
3392 | |
3393 void G1CollectedHeap::verify_before_gc() { | |
3394 double verify_time_ms = verify(VerifyBeforeGC, " VerifyBeforeGC:"); | |
3395 g1_policy()->phase_times()->record_verify_before_time_ms(verify_time_ms); | |
3396 } | |
3397 | |
3398 void G1CollectedHeap::verify_after_gc() { | |
3399 double verify_time_ms = verify(VerifyAfterGC, " VerifyAfterGC:"); | |
3400 g1_policy()->phase_times()->record_verify_after_time_ms(verify_time_ms); | |
3401 } | |
3402 | |
342 | 3403 class PrintRegionClosure: public HeapRegionClosure { |
3404 outputStream* _st; | |
3405 public: | |
3406 PrintRegionClosure(outputStream* st) : _st(st) {} | |
3407 bool doHeapRegion(HeapRegion* r) { | |
3408 r->print_on(_st); | |
3409 return false; | |
3410 } | |
3411 }; | |
3412 | |
17833
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8038498: Fix includes and C inlining after 8035330
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|
3413 bool G1CollectedHeap::is_obj_dead_cond(const oop obj, |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
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diff
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|
3414 const HeapRegion* hr, |
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8038498: Fix includes and C inlining after 8035330
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diff
changeset
|
3415 const VerifyOption vo) const { |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
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diff
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|
3416 switch (vo) { |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
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diff
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|
3417 case VerifyOption_G1UsePrevMarking: return is_obj_dead(obj, hr); |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
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diff
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|
3418 case VerifyOption_G1UseNextMarking: return is_obj_ill(obj, hr); |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
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diff
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|
3419 case VerifyOption_G1UseMarkWord: return !obj->is_gc_marked(); |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
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diff
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|
3420 default: ShouldNotReachHere(); |
bfdf528be8e8
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tschatzl
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diff
changeset
|
3421 } |
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8038498: Fix includes and C inlining after 8035330
tschatzl
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diff
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|
3422 return false; // keep some compilers happy |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
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diff
changeset
|
3423 } |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
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diff
changeset
|
3424 |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
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diff
changeset
|
3425 bool G1CollectedHeap::is_obj_dead_cond(const oop obj, |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
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diff
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|
3426 const VerifyOption vo) const { |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
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changeset
|
3427 switch (vo) { |
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8038498: Fix includes and C inlining after 8035330
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|
3428 case VerifyOption_G1UsePrevMarking: return is_obj_dead(obj); |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
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diff
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|
3429 case VerifyOption_G1UseNextMarking: return is_obj_ill(obj); |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
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diff
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|
3430 case VerifyOption_G1UseMarkWord: return !obj->is_gc_marked(); |
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tschatzl
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diff
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|
3431 default: ShouldNotReachHere(); |
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8038498: Fix includes and C inlining after 8035330
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diff
changeset
|
3432 } |
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8038498: Fix includes and C inlining after 8035330
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diff
changeset
|
3433 return false; // keep some compilers happy |
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8038498: Fix includes and C inlining after 8035330
tschatzl
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diff
changeset
|
3434 } |
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diff
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|
3435 |
342 | 3436 void G1CollectedHeap::print_on(outputStream* st) const { |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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811
diff
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|
3437 st->print(" %-20s", "garbage-first heap"); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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811
diff
changeset
|
3438 st->print(" total " SIZE_FORMAT "K, used " SIZE_FORMAT "K", |
846
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
3439 capacity()/K, used_unlocked()/K); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3440 st->print(" [" INTPTR_FORMAT ", " INTPTR_FORMAT ", " INTPTR_FORMAT ")", |
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
3441 _hrm.reserved().start(), |
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
3442 _hrm.reserved().start() + _hrm.length() + HeapRegion::GrainWords, |
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
3443 _hrm.reserved().end()); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
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811
diff
changeset
|
3444 st->cr(); |
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3983
diff
changeset
|
3445 st->print(" region size " SIZE_FORMAT "K, ", HeapRegion::GrainBytes / K); |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3446 uint young_regions = _young_list->length(); |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3447 st->print("%u young (" SIZE_FORMAT "K), ", young_regions, |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3448 (size_t) young_regions * HeapRegion::GrainBytes / K); |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3449 uint survivor_regions = g1_policy()->recorded_survivor_regions(); |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3450 st->print("%u survivors (" SIZE_FORMAT "K)", survivor_regions, |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
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6008
diff
changeset
|
3451 (size_t) survivor_regions * HeapRegion::GrainBytes / K); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3452 st->cr(); |
6863
04155d9c8c76
8000358: G1: metaspace information not printed in PrintHeapAtGC output nor in hs_err file
johnc
parents:
6819
diff
changeset
|
3453 MetaspaceAux::print_on(st); |
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3454 } |
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3455 |
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3456 void G1CollectedHeap::print_extended_on(outputStream* st) const { |
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3457 print_on(st); |
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3458 |
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
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4072
diff
changeset
|
3459 // Print the per-region information. |
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3460 st->cr(); |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3461 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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6008
diff
changeset
|
3462 "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
|
3463 "CS=collection set, F=free, TS=gc time stamp, " |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
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6008
diff
changeset
|
3464 "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
|
3465 "NTAMS=next top-at-mark-start)"); |
342 | 3466 PrintRegionClosure blk(st); |
3766 | 3467 heap_region_iterate(&blk); |
342 | 3468 } |
3469 | |
9076
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3470 void G1CollectedHeap::print_on_error(outputStream* st) const { |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
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8855
diff
changeset
|
3471 this->CollectedHeap::print_on_error(st); |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3472 |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3473 if (_cm != NULL) { |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3474 st->cr(); |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
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8855
diff
changeset
|
3475 _cm->print_on_error(st); |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3476 } |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
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8855
diff
changeset
|
3477 } |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
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8855
diff
changeset
|
3478 |
342 | 3479 void G1CollectedHeap::print_gc_threads_on(outputStream* st) const { |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
3480 if (G1CollectedHeap::use_parallel_gc_threads()) { |
1019 | 3481 workers()->print_worker_threads_on(st); |
3482 } | |
3483 _cmThread->print_on(st); | |
342 | 3484 st->cr(); |
1019 | 3485 _cm->print_worker_threads_on(st); |
3486 _cg1r->print_worker_threads_on(st); | |
17764 | 3487 if (G1StringDedup::is_enabled()) { |
3488 G1StringDedup::print_worker_threads_on(st); | |
3489 } | |
342 | 3490 } |
3491 | |
3492 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
|
3493 if (G1CollectedHeap::use_parallel_gc_threads()) { |
342 | 3494 workers()->threads_do(tc); |
3495 } | |
3496 tc->do_thread(_cmThread); | |
794 | 3497 _cg1r->threads_do(tc); |
17764 | 3498 if (G1StringDedup::is_enabled()) { |
3499 G1StringDedup::threads_do(tc); | |
3500 } | |
342 | 3501 } |
3502 | |
3503 void G1CollectedHeap::print_tracing_info() const { | |
3504 // We'll overload this to mean "trace GC pause statistics." | |
3505 if (TraceGen0Time || TraceGen1Time) { | |
3506 // The "G1CollectorPolicy" is keeping track of these stats, so delegate | |
3507 // to that. | |
3508 g1_policy()->print_tracing_info(); | |
3509 } | |
751 | 3510 if (G1SummarizeRSetStats) { |
342 | 3511 g1_rem_set()->print_summary_info(); |
3512 } | |
1282 | 3513 if (G1SummarizeConcMark) { |
342 | 3514 concurrent_mark()->print_summary_info(); |
3515 } | |
3516 g1_policy()->print_yg_surv_rate_info(); | |
3517 SpecializationStats::print(); | |
3518 } | |
3519 | |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
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3774
diff
changeset
|
3520 #ifndef PRODUCT |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
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3774
diff
changeset
|
3521 // Helpful for debugging RSet issues. |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
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3774
diff
changeset
|
3522 |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
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3774
diff
changeset
|
3523 class PrintRSetsClosure : public HeapRegionClosure { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3524 private: |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3525 const char* _msg; |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
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3774
diff
changeset
|
3526 size_t _occupied_sum; |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
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3774
diff
changeset
|
3527 |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
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3774
diff
changeset
|
3528 public: |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3529 bool doHeapRegion(HeapRegion* r) { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3530 HeapRegionRemSet* hrrs = r->rem_set(); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
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3774
diff
changeset
|
3531 size_t occupied = hrrs->occupied(); |
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7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3532 _occupied_sum += occupied; |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3533 |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3534 gclog_or_tty->print_cr("Printing RSet for region "HR_FORMAT, |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3535 HR_FORMAT_PARAMS(r)); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3536 if (occupied == 0) { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3537 gclog_or_tty->print_cr(" RSet is empty"); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3538 } else { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3539 hrrs->print(); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3540 } |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3541 gclog_or_tty->print_cr("----------"); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3542 return false; |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3543 } |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3544 |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3545 PrintRSetsClosure(const char* msg) : _msg(msg), _occupied_sum(0) { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3546 gclog_or_tty->cr(); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3547 gclog_or_tty->print_cr("========================================"); |
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17935
diff
changeset
|
3548 gclog_or_tty->print_cr("%s", msg); |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3549 gclog_or_tty->cr(); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3550 } |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3551 |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3552 ~PrintRSetsClosure() { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3553 gclog_or_tty->print_cr("Occupied Sum: "SIZE_FORMAT, _occupied_sum); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3554 gclog_or_tty->print_cr("========================================"); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3555 gclog_or_tty->cr(); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3556 } |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3557 }; |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3558 |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3559 void G1CollectedHeap::print_cset_rsets() { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3560 PrintRSetsClosure cl("Printing CSet RSets"); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3561 collection_set_iterate(&cl); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3562 } |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3563 |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3564 void G1CollectedHeap::print_all_rsets() { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3565 PrintRSetsClosure cl("Printing All RSets");; |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3566 heap_region_iterate(&cl); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3567 } |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3568 #endif // PRODUCT |
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tonyp
parents:
3774
diff
changeset
|
3569 |
342 | 3570 G1CollectedHeap* G1CollectedHeap::heap() { |
3571 assert(_sh->kind() == CollectedHeap::G1CollectedHeap, | |
3572 "not a garbage-first heap"); | |
3573 return _g1h; | |
3574 } | |
3575 | |
3576 void G1CollectedHeap::gc_prologue(bool full /* Ignored */) { | |
1245
6484c4ee11cb
6904516: More object array barrier fixes, following up on 6906727
ysr
parents:
1166
diff
changeset
|
3577 // always_do_update_barrier = false; |
342 | 3578 assert(InlineCacheBuffer::is_empty(), "should have cleaned up ICBuffer"); |
3579 // Fill TLAB's and such | |
17727 | 3580 accumulate_statistics_all_tlabs(); |
342 | 3581 ensure_parsability(true); |
12339
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3582 |
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3583 if (G1SummarizeRSetStats && (G1SummarizeRSetStatsPeriod > 0) && |
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3584 (total_collections() % G1SummarizeRSetStatsPeriod == 0)) { |
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3585 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
tschatzl
parents:
12305
diff
changeset
|
3586 } |
342 | 3587 } |
3588 | |
20445
e5668dcf12e9
8057818: collect allocation context statistics at gc pauses
jcoomes
parents:
20404
diff
changeset
|
3589 void G1CollectedHeap::gc_epilogue(bool full) { |
10372
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3590 |
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3591 if (G1SummarizeRSetStats && |
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3592 (G1SummarizeRSetStatsPeriod > 0) && |
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3593 // 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
|
3594 ((total_collections() - 1) % G1SummarizeRSetStatsPeriod == 0)) { |
12339
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3595 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
|
3596 } |
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3597 |
342 | 3598 // FIXME: what is this about? |
3599 // I'm ignoring the "fill_newgen()" call if "alloc_event_enabled" | |
3600 // is set. | |
3601 COMPILER2_PRESENT(assert(DerivedPointerTable::is_empty(), | |
3602 "derived pointer present")); | |
1245
6484c4ee11cb
6904516: More object array barrier fixes, following up on 6906727
ysr
parents:
1166
diff
changeset
|
3603 // always_do_update_barrier = true; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3604 |
17727 | 3605 resize_all_tlabs(); |
20445
e5668dcf12e9
8057818: collect allocation context statistics at gc pauses
jcoomes
parents:
20404
diff
changeset
|
3606 allocation_context_stats().update(full); |
17727 | 3607 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3608 // We have just completed a GC. Update the soft reference |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3609 // policy with the new heap occupancy |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3610 Universe::update_heap_info_at_gc(); |
342 | 3611 } |
3612 | |
1973 | 3613 HeapWord* G1CollectedHeap::do_collection_pause(size_t word_size, |
3614 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
|
3615 bool* succeeded, |
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
12082
diff
changeset
|
3616 GCCause::Cause gc_cause) { |
1973 | 3617 assert_heap_not_locked_and_not_at_safepoint(); |
342 | 3618 g1_policy()->record_stop_world_start(); |
1973 | 3619 VM_G1IncCollectionPause op(gc_count_before, |
3620 word_size, | |
3621 false, /* should_initiate_conc_mark */ | |
3622 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
|
3623 gc_cause); |
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
3624 |
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
3625 op.set_allocation_context(AllocationContext::current()); |
1973 | 3626 VMThread::execute(&op); |
3627 | |
3628 HeapWord* result = op.result(); | |
3629 bool ret_succeeded = op.prologue_succeeded() && op.pause_succeeded(); | |
3630 assert(result == NULL || ret_succeeded, | |
3631 "the result should be NULL if the VM did not succeed"); | |
3632 *succeeded = ret_succeeded; | |
3633 | |
3634 assert_heap_not_locked(); | |
3635 return result; | |
342 | 3636 } |
3637 | |
3638 void | |
3639 G1CollectedHeap::doConcurrentMark() { | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3640 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
|
3641 if (!_cmThread->in_progress()) { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3642 _cmThread->set_started(); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3643 CGC_lock->notify(); |
342 | 3644 } |
3645 } | |
3646 | |
3647 size_t G1CollectedHeap::pending_card_num() { | |
3648 size_t extra_cards = 0; | |
3649 JavaThread *curr = Threads::first(); | |
3650 while (curr != NULL) { | |
3651 DirtyCardQueue& dcq = curr->dirty_card_queue(); | |
3652 extra_cards += dcq.size(); | |
3653 curr = curr->next(); | |
3654 } | |
3655 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
3656 size_t buffer_size = dcqs.buffer_size(); | |
3657 size_t buffer_num = dcqs.completed_buffers_num(); | |
6611 | 3658 |
3659 // PtrQueueSet::buffer_size() and PtrQueue:size() return sizes | |
3660 // in bytes - not the number of 'entries'. We need to convert | |
3661 // into a number of cards. | |
3662 return (buffer_size * buffer_num + extra_cards) / oopSize; | |
342 | 3663 } |
3664 | |
3665 size_t G1CollectedHeap::cards_scanned() { | |
1861 | 3666 return g1_rem_set()->cardsScanned(); |
342 | 3667 } |
3668 | |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3669 bool G1CollectedHeap::humongous_region_is_always_live(uint index) { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3670 HeapRegion* region = region_at(index); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3671 assert(region->startsHumongous(), "Must start a humongous object"); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3672 return oop(region->bottom())->is_objArray() || !region->rem_set()->is_empty(); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3673 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3674 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3675 class RegisterHumongousWithInCSetFastTestClosure : public HeapRegionClosure { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3676 private: |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3677 size_t _total_humongous; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3678 size_t _candidate_humongous; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3679 public: |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3680 RegisterHumongousWithInCSetFastTestClosure() : _total_humongous(0), _candidate_humongous(0) { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3681 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3682 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3683 virtual bool doHeapRegion(HeapRegion* r) { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3684 if (!r->startsHumongous()) { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3685 return false; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3686 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3687 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3688 |
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
3689 uint region_idx = r->hrm_index(); |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3690 bool is_candidate = !g1h->humongous_region_is_always_live(region_idx); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3691 // Is_candidate already filters out humongous regions with some remembered set. |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3692 // This will not lead to humongous object that we mistakenly keep alive because |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3693 // during young collection the remembered sets will only be added to. |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3694 if (is_candidate) { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3695 g1h->register_humongous_region_with_in_cset_fast_test(region_idx); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3696 _candidate_humongous++; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3697 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3698 _total_humongous++; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3699 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3700 return false; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3701 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3702 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3703 size_t total_humongous() const { return _total_humongous; } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3704 size_t candidate_humongous() const { return _candidate_humongous; } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3705 }; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3706 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3707 void G1CollectedHeap::register_humongous_regions_with_in_cset_fast_test() { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3708 if (!G1ReclaimDeadHumongousObjectsAtYoungGC) { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3709 g1_policy()->phase_times()->record_fast_reclaim_humongous_stats(0, 0); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3710 return; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3711 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3712 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3713 RegisterHumongousWithInCSetFastTestClosure cl; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3714 heap_region_iterate(&cl); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3715 g1_policy()->phase_times()->record_fast_reclaim_humongous_stats(cl.total_humongous(), |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3716 cl.candidate_humongous()); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3717 _has_humongous_reclaim_candidates = cl.candidate_humongous() > 0; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3718 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3719 if (_has_humongous_reclaim_candidates) { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3720 clear_humongous_is_live_table(); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3721 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3722 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3723 |
342 | 3724 void |
3725 G1CollectedHeap::setup_surviving_young_words() { | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3726 assert(_surviving_young_words == NULL, "pre-condition"); |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3727 uint array_length = g1_policy()->young_cset_region_length(); |
6197 | 3728 _surviving_young_words = NEW_C_HEAP_ARRAY(size_t, (size_t) array_length, mtGC); |
342 | 3729 if (_surviving_young_words == NULL) { |
10161
746b070f5022
8011661: Insufficient memory message says "malloc" when sometimes it should say "mmap"
ccheung
parents:
10099
diff
changeset
|
3730 vm_exit_out_of_memory(sizeof(size_t) * array_length, OOM_MALLOC_ERROR, |
342 | 3731 "Not enough space for young surv words summary."); |
3732 } | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3733 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
|
3734 #ifdef ASSERT |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3735 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
|
3736 assert( _surviving_young_words[i] == 0, "memset above" ); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3737 } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3738 #endif // !ASSERT |
342 | 3739 } |
3740 | |
3741 void | |
3742 G1CollectedHeap::update_surviving_young_words(size_t* surv_young_words) { | |
3743 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
|
3744 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
|
3745 for (uint i = 0; i < array_length; ++i) { |
342 | 3746 _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
|
3747 } |
342 | 3748 } |
3749 | |
3750 void | |
3751 G1CollectedHeap::cleanup_surviving_young_words() { | |
3752 guarantee( _surviving_young_words != NULL, "pre-condition" ); | |
6197 | 3753 FREE_C_HEAP_ARRAY(size_t, _surviving_young_words, mtGC); |
342 | 3754 _surviving_young_words = NULL; |
3755 } | |
3756 | |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3757 #ifdef ASSERT |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3758 class VerifyCSetClosure: public HeapRegionClosure { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3759 public: |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3760 bool doHeapRegion(HeapRegion* hr) { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3761 // 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
|
3762 // 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
|
3763 // 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
|
3764 // 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
|
3765 // 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
|
3766 // 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
|
3767 // 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
|
3768 // 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
|
3769 // evacuation failure handling. |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3770 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
|
3771 |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3772 // 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
|
3773 // perform on CSet regions. |
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3774 return false; |
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3775 } |
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3776 }; |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3777 #endif // ASSERT |
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3778 |
1709 | 3779 #if TASKQUEUE_STATS |
3780 void G1CollectedHeap::print_taskqueue_stats_hdr(outputStream* const st) { | |
3781 st->print_raw_cr("GC Task Stats"); | |
3782 st->print_raw("thr "); TaskQueueStats::print_header(1, st); st->cr(); | |
3783 st->print_raw("--- "); TaskQueueStats::print_header(2, st); st->cr(); | |
3784 } | |
3785 | |
3786 void G1CollectedHeap::print_taskqueue_stats(outputStream* const st) const { | |
3787 print_taskqueue_stats_hdr(st); | |
3788 | |
3789 TaskQueueStats totals; | |
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3790 const int n = workers() != NULL ? workers()->total_workers() : 1; |
1709 | 3791 for (int i = 0; i < n; ++i) { |
3792 st->print("%3d ", i); task_queue(i)->stats.print(st); st->cr(); | |
3793 totals += task_queue(i)->stats; | |
3794 } | |
3795 st->print_raw("tot "); totals.print(st); st->cr(); | |
3796 | |
3797 DEBUG_ONLY(totals.verify()); | |
3798 } | |
3799 | |
3800 void G1CollectedHeap::reset_taskqueue_stats() { | |
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3801 const int n = workers() != NULL ? workers()->total_workers() : 1; |
1709 | 3802 for (int i = 0; i < n; ++i) { |
3803 task_queue(i)->stats.reset(); | |
3804 } | |
3805 } | |
3806 #endif // TASKQUEUE_STATS | |
3807 | |
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3808 void G1CollectedHeap::log_gc_header() { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3809 if (!G1Log::fine()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3810 return; |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3811 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3812 |
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
3813 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
|
3814 |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3815 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
|
3816 .append(g1_policy()->gcs_are_young() ? "(young)" : "(mixed)") |
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3817 .append(g1_policy()->during_initial_mark_pause() ? " (initial-mark)" : ""); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3818 |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3819 gclog_or_tty->print("[%s", (const char*)gc_cause_str); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3820 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3821 |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3822 void G1CollectedHeap::log_gc_footer(double pause_time_sec) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3823 if (!G1Log::fine()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3824 return; |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3825 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3826 |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3827 if (G1Log::finer()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3828 if (evacuation_failed()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3829 gclog_or_tty->print(" (to-space exhausted)"); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3830 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3831 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
|
3832 g1_policy()->phase_times()->note_gc_end(); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3833 g1_policy()->phase_times()->print(pause_time_sec); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3834 g1_policy()->print_detailed_heap_transition(); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3835 } else { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3836 if (evacuation_failed()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3837 gclog_or_tty->print("--"); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3838 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3839 g1_policy()->print_heap_transition(); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3840 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
|
3841 } |
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
3842 gclog_or_tty->flush(); |
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3843 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3844 |
1973 | 3845 bool |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3846 G1CollectedHeap::do_collection_pause_at_safepoint(double target_pause_time_ms) { |
2152 | 3847 assert_at_safepoint(true /* should_be_vm_thread */); |
3848 guarantee(!is_gc_active(), "collection is not reentrant"); | |
3849 | |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3850 if (GC_locker::check_active_before_gc()) { |
1973 | 3851 return false; |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3852 } |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3853 |
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
3854 _gc_timer_stw->register_gc_start(); |
10405 | 3855 |
3856 _gc_tracer_stw->report_gc_start(gc_cause(), _gc_timer_stw->gc_start()); | |
3857 | |
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2039
diff
changeset
|
3858 SvcGCMarker sgcm(SvcGCMarker::MINOR); |
2039
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3859 ResourceMark rm; |
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3860 |
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4787
diff
changeset
|
3861 print_heap_before_gc(); |
10405 | 3862 trace_heap_before_gc(_gc_tracer_stw); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3863 |
2152 | 3864 verify_region_sets_optional(); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3865 verify_dirty_young_regions(); |
2152 | 3866 |
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3867 // 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
|
3868 // 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
|
3869 // for the duration of this pause. |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3870 g1_policy()->decide_on_conc_mark_initiation(); |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3871 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3872 // 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
|
3873 assert(!g1_policy()->during_initial_mark_pause() || |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3874 g1_policy()->gcs_are_young(), "sanity"); |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3875 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3876 // 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
|
3877 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
|
3878 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3879 // 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
|
3880 // 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
|
3881 // 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
|
3882 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
|
3883 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3884 // 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
|
3885 { |
10405 | 3886 EvacuationInfo evacuation_info; |
3887 | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3888 if (g1_policy()->during_initial_mark_pause()) { |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3889 // 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
|
3890 // full collection counter. |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
3891 increment_old_marking_cycles_started(); |
10405 | 3892 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
|
3893 } |
10405 | 3894 |
3895 _gc_tracer_stw->report_yc_type(yc_type()); | |
3896 | |
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
3897 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
6030 | 3898 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3899 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
|
3900 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
|
3901 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
|
3902 g1_policy()->phase_times()->note_gc_start(active_workers); |
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3903 log_gc_header(); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3904 |
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
3905 TraceCollectorStats tcs(g1mm()->incremental_collection_counters()); |
3356
78542e2b5e35
7036199: Adding a notification to the implementation of GarbageCollectorMXBeans
fparain
parents:
3323
diff
changeset
|
3906 TraceMemoryManagerStats tms(false /* fullGC */, gc_cause()); |
1089
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
tonyp
parents:
1088
diff
changeset
|
3907 |
2361 | 3908 // If the secondary_free_list is not empty, append it to the |
3909 // free_list. No need to wait for the cleanup operation to finish; | |
3910 // the region allocation code will check the secondary_free_list | |
3911 // and wait if necessary. If the G1StressConcRegionFreeing flag is | |
3912 // set, skip this step so that the region allocation code has to | |
3913 // get entries from the secondary_free_list. | |
2152 | 3914 if (!G1StressConcRegionFreeing) { |
2361 | 3915 append_secondary_free_list_if_not_empty_with_lock(); |
2152 | 3916 } |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3917 |
12080 | 3918 assert(check_young_list_well_formed(), "young list should be well formed"); |
3919 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
3920 "sanity check"); | |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3921 |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3922 // 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
|
3923 // 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
|
3924 // it will be set. |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3925 |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3926 { // 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
|
3927 IsGCActiveMark x; |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3928 |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3929 gc_prologue(false); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3930 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
|
3931 increment_gc_time_stamp(); |
342 | 3932 |
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
|
3933 verify_before_gc(); |
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
3934 check_bitmaps("GC Start"); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3935 |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3936 COMPILER2_PRESENT(DerivedPointerTable::clear()); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3937 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3938 // Please see comment in g1CollectedHeap.hpp and |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3939 // G1CollectedHeap::ref_processing_init() to see how |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3940 // reference processing currently works in G1. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3941 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3942 // Enable discovery in the STW reference processor |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3943 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3944 true /*verify_no_refs*/); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3945 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3946 { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3947 // We want to temporarily turn off discovery by the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3948 // CM ref processor, if necessary, and turn it back on |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3949 // on again later if we do. Using a scoped |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3950 // NoRefDiscovery object will do this. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3951 NoRefDiscovery no_cm_discovery(ref_processor_cm()); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3952 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3953 // 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
|
3954 // of the collection set!). |
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
3955 _allocator->release_mutator_alloc_region(); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3956 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3957 // We should call this after we retire the mutator alloc |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3958 // region(s) so that all the ALLOC / RETIRE events are generated |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3959 // before the start GC event. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3960 _hr_printer.start_gc(false /* full */, (size_t) total_collections()); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3961 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3962 // 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
|
3963 // 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
|
3964 // 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
|
3965 // |
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3966 // 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
|
3967 // |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3968 // The elapsed time induced by the start time below deliberately elides |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3969 // 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
|
3970 double sample_start_time_sec = os::elapsedTime(); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3971 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3972 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3973 gclog_or_tty->print_cr("\nBefore recording pause start.\nYoung_list:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3974 _young_list->print(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3975 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
|
3976 #endif // YOUNG_LIST_VERBOSE |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3977 |
10098
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
3978 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
|
3979 |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3980 double scan_wait_start = os::elapsedTime(); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3981 // 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
|
3982 // 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
|
3983 // 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
|
3984 // moving them during the GC. |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3985 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
|
3986 double wait_time_ms = 0.0; |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3987 if (waited) { |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
3988 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
|
3989 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
|
3990 } |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3991 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
|
3992 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3993 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3994 gclog_or_tty->print_cr("\nAfter recording pause start.\nYoung_list:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3995 _young_list->print(); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
3996 #endif // YOUNG_LIST_VERBOSE |
342 | 3997 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3998 if (g1_policy()->during_initial_mark_pause()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3999 concurrent_mark()->checkpointRootsInitialPre(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4000 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4001 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4002 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4003 gclog_or_tty->print_cr("\nBefore choosing collection set.\nYoung_list:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4004 _young_list->print(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4005 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
|
4006 #endif // YOUNG_LIST_VERBOSE |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4007 |
10405 | 4008 g1_policy()->finalize_cset(target_pause_time_ms, evacuation_info); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4009 |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4010 register_humongous_regions_with_in_cset_fast_test(); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4011 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4012 _cm->note_start_of_gc(); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4013 // 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
|
4014 // 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
|
4015 // 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
|
4016 // ensure that the CSet has been finalized. |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4017 _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
|
4018 true /* verify_enqueued_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4019 false /* verify_thread_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4020 true /* verify_fingers */); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4021 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4022 if (_hr_printer.is_active()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4023 HeapRegion* hr = g1_policy()->collection_set(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4024 while (hr != NULL) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4025 _hr_printer.cset(hr); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4026 hr = hr->next_in_collection_set(); |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4027 } |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4028 } |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4029 |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
4030 #ifdef ASSERT |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4031 VerifyCSetClosure cl; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4032 collection_set_iterate(&cl); |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
4033 #endif // ASSERT |
1707 | 4034 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4035 setup_surviving_young_words(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4036 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4037 // Initialize the GC alloc regions. |
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
4038 _allocator->init_gc_alloc_regions(evacuation_info); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4039 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4040 // Actually do the work... |
10405 | 4041 evacuate_collection_set(evacuation_info); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4042 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4043 // 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
|
4044 // (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
|
4045 // 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
|
4046 // 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
|
4047 // we checked. |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4048 _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
|
4049 false /* verify_enqueued_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4050 true /* verify_thread_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4051 true /* verify_fingers */); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4052 |
10405 | 4053 free_collection_set(g1_policy()->collection_set(), evacuation_info); |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4054 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4055 eagerly_reclaim_humongous_regions(); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4056 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4057 g1_policy()->clear_collection_set(); |
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 cleanup_surviving_young_words(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4060 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4061 // Start a new incremental collection set for the next pause. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4062 g1_policy()->start_incremental_cset_building(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4063 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4064 clear_cset_fast_test(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4065 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4066 _young_list->reset_sampled_info(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4067 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4068 // Don't check the whole heap at this point as the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4069 // GC alloc regions from this pause have been tagged |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4070 // as survivors and moved on to the survivor list. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4071 // Survivor regions will fail the !is_young() check. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4072 assert(check_young_list_empty(false /* check_heap */), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4073 "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
|
4074 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4075 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4076 gclog_or_tty->print_cr("Before recording survivors.\nYoung List:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4077 _young_list->print(); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4078 #endif // YOUNG_LIST_VERBOSE |
342 | 4079 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4080 g1_policy()->record_survivor_regions(_young_list->survivor_length(), |
10405 | 4081 _young_list->first_survivor_region(), |
4082 _young_list->last_survivor_region()); | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4083 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4084 _young_list->reset_auxilary_lists(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4085 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4086 if (evacuation_failed()) { |
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
4087 _allocator->set_used(recalculate_used()); |
10405 | 4088 uint n_queues = MAX2((int)ParallelGCThreads, 1); |
4089 for (uint i = 0; i < n_queues; i++) { | |
4090 if (_evacuation_failed_info_array[i].has_failed()) { | |
4091 _gc_tracer_stw->report_evacuation_failed(_evacuation_failed_info_array[i]); | |
4092 } | |
4093 } | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4094 } else { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4095 // The "used" of the the collection set have already been subtracted |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4096 // when they were freed. Add in the bytes evacuated. |
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
4097 _allocator->increase_used(g1_policy()->bytes_copied_during_gc()); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4098 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4099 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4100 if (g1_policy()->during_initial_mark_pause()) { |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4101 // 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
|
4102 // 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
|
4103 // appropriate initialization is done on the CM object. |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4104 concurrent_mark()->checkpointRootsInitialPost(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4105 set_marking_started(); |
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4106 // 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
|
4107 // 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
|
4108 // the current thread has completed its logging output. |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4109 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4110 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4111 allocate_dummy_regions(); |
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
4112 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4113 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4114 gclog_or_tty->print_cr("\nEnd of the pause.\nYoung_list:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4115 _young_list->print(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4116 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
|
4117 #endif // YOUNG_LIST_VERBOSE |
342 | 4118 |
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
4119 _allocator->init_mutator_alloc_region(); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4120 |
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 size_t expand_bytes = g1_policy()->expansion_amount(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4123 if (expand_bytes > 0) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4124 size_t bytes_before = capacity(); |
4785 | 4125 // No need for an ergo verbose message here, |
4126 // expansion_amount() does this when it returns a value > 0. | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4127 if (!expand(expand_bytes)) { |
20336
6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
20335
diff
changeset
|
4128 // We failed to expand the heap. Cannot do anything about it. |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4129 } |
3920
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4130 } |
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4131 } |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4132 |
10405 | 4133 // 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
|
4134 // 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
|
4135 _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
|
4136 true /* verify_enqueued_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4137 true /* verify_thread_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4138 true /* verify_fingers */); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4139 _cm->note_end_of_gc(); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4140 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4141 // 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
|
4142 // 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
|
4143 // 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
|
4144 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
|
4145 double pause_time_ms = (sample_end_time_sec - sample_start_time_sec) * MILLIUNITS; |
10405 | 4146 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
|
4147 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4148 MemoryService::track_memory_usage(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4149 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4150 // 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
|
4151 // update buffers to bring the RSets up-to-date if |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4152 // G1HRRSFlushLogBuffersOnVerify has been set. While scanning |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4153 // 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
|
4154 // regions we just allocated to (i.e., the GC alloc |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4155 // regions). However, during the last GC we called |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4156 // set_saved_mark() on all the GC alloc regions, so card |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4157 // scanning might skip the [saved_mark_word()...top()] area of |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4158 // those regions (i.e., the area we allocated objects into |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4159 // during the last GC). But it shouldn't. Given that |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4160 // saved_mark_word() is conditional on whether the GC time stamp |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4161 // 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
|
4162 // 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
|
4163 // regions and saved_mark_word() will simply return top() for |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4164 // 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
|
4165 // than iterating over the regions and fixing them. In fact, the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4166 // GC time stamp increment here also ensures that |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4167 // saved_mark_word() will return top() between pauses, i.e., |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4168 // during concurrent refinement. So we don't need the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4169 // is_gc_active() check to decided which top to use when |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4170 // scanning cards (see CR 7039627). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4171 increment_gc_time_stamp(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4172 |
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
|
4173 verify_after_gc(); |
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
4174 check_bitmaps("GC End"); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4175 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4176 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4177 ref_processor_stw()->verify_no_references_recorded(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4178 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4179 // 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
|
4180 } |
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4181 |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4182 // 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
|
4183 // 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
|
4184 // 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
|
4185 // RETIRE events are generated before the end GC event. |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4186 _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
|
4187 |
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4188 #ifdef TRACESPINNING |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4189 ParallelTaskTerminator::print_termination_counts(); |
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4190 #endif |
342 | 4191 |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4192 gc_epilogue(false); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4193 } |
6121
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4194 |
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
4195 // 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
|
4196 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
|
4197 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4198 // 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
|
4199 // 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
|
4200 // 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
|
4201 // logging output either. |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4202 |
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
4203 _hrm.verify_optional(); |
6121
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4204 verify_region_sets_optional(); |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4205 |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4206 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
|
4207 TASKQUEUE_STATS_ONLY(reset_taskqueue_stats()); |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4208 |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4209 print_heap_after_gc(); |
10405 | 4210 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
|
4211 |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4212 // 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
|
4213 // 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
|
4214 // 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
|
4215 // before any GC notifications are raised. |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4216 g1mm()->update_sizes(); |
10405 | 4217 |
4218 _gc_tracer_stw->report_evacuation_info(&evacuation_info); | |
4219 _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
|
4220 _gc_timer_stw->register_gc_end(); |
10405 | 4221 _gc_tracer_stw->report_gc_end(_gc_timer_stw->gc_end(), _gc_timer_stw->time_partitions()); |
4222 } | |
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4223 // 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
|
4224 // 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
|
4225 // that came from the pause. |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4226 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4227 if (should_start_conc_mark) { |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4228 // CAUTION: after the doConcurrentMark() call below, |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4229 // the concurrent marking thread(s) could be running |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4230 // concurrently with us. Make sure that anything after |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4231 // 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
|
4232 // 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
|
4233 // not start until the safepoint itself is released in |
20192 | 4234 // SuspendibleThreadSet::desynchronize(). |
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4235 doConcurrentMark(); |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4236 } |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4237 |
1973 | 4238 return true; |
342 | 4239 } |
4240 | |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4241 size_t G1CollectedHeap::desired_plab_sz(GCAllocPurpose purpose) |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4242 { |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4243 size_t gclab_word_size; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4244 switch (purpose) { |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4245 case GCAllocForSurvived: |
6595 | 4246 gclab_word_size = _survivor_plab_stats.desired_plab_sz(); |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4247 break; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4248 case GCAllocForTenured: |
6595 | 4249 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4250 break; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4251 default: |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4252 assert(false, "unknown GCAllocPurpose"); |
6595 | 4253 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4254 break; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4255 } |
6595 | 4256 |
4257 // Prevent humongous PLAB sizes for two reasons: | |
4258 // * PLABs are allocated using a similar paths as oops, but should | |
4259 // never be in a humongous region | |
4260 // * Allowing humongous PLABs needlessly churns the region free lists | |
4261 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
|
4262 } |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4263 |
342 | 4264 void G1CollectedHeap::init_for_evac_failure(OopsInHeapRegionClosure* cl) { |
4265 _drain_in_progress = false; | |
4266 set_evac_failure_closure(cl); | |
6197 | 4267 _evac_failure_scan_stack = new (ResourceObj::C_HEAP, mtGC) GrowableArray<oop>(40, true); |
342 | 4268 } |
4269 | |
4270 void G1CollectedHeap::finalize_for_evac_failure() { | |
4271 assert(_evac_failure_scan_stack != NULL && | |
4272 _evac_failure_scan_stack->length() == 0, | |
4273 "Postcondition"); | |
4274 assert(!_drain_in_progress, "Postcondition"); | |
1045 | 4275 delete _evac_failure_scan_stack; |
342 | 4276 _evac_failure_scan_stack = NULL; |
4277 } | |
4278 | |
4279 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
|
4280 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
|
4281 |
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4282 double remove_self_forwards_start = os::elapsedTime(); |
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4283 |
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4284 G1ParRemoveSelfForwardPtrsTask rsfp_task(this); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4285 |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4286 if (G1CollectedHeap::use_parallel_gc_threads()) { |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4287 set_par_threads(); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4288 workers()->run_task(&rsfp_task); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4289 set_par_threads(0); |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
4290 } else { |
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4291 rsfp_task.work(0); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4292 } |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4293 |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4294 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
|
4295 |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4296 // 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
|
4297 reset_cset_heap_region_claim_values(); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4298 |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4299 assert(check_cset_heap_region_claim_values(HeapRegion::InitialClaimValue), "sanity"); |
342 | 4300 |
4301 // 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
|
4302 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
|
4303 _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
|
4304 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
|
4305 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
|
4306 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
|
4307 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
|
4308 } |
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4309 _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
|
4310 _preserved_marks_of_objs.clear(true); |
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4311 |
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4312 g1_policy()->phase_times()->record_evac_fail_remove_self_forwards((os::elapsedTime() - remove_self_forwards_start) * 1000.0); |
342 | 4313 } |
4314 | |
4315 void G1CollectedHeap::push_on_evac_failure_scan_stack(oop obj) { | |
4316 _evac_failure_scan_stack->push(obj); | |
4317 } | |
4318 | |
4319 void G1CollectedHeap::drain_evac_failure_scan_stack() { | |
4320 assert(_evac_failure_scan_stack != NULL, "precondition"); | |
4321 | |
4322 while (_evac_failure_scan_stack->length() > 0) { | |
4323 oop obj = _evac_failure_scan_stack->pop(); | |
4324 _evac_failure_closure->set_region(heap_region_containing(obj)); | |
4325 obj->oop_iterate_backwards(_evac_failure_closure); | |
4326 } | |
4327 } | |
4328 | |
4329 oop | |
10405 | 4330 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
|
4331 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
|
4332 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
|
4333 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
|
4334 (HeapWord*) old)); |
342 | 4335 markOop m = old->mark(); |
4336 oop forward_ptr = old->forward_to_atomic(old); | |
4337 if (forward_ptr == NULL) { | |
4338 // Forward-to-self succeeded. | |
10405 | 4339 assert(_par_scan_state != NULL, "par scan state"); |
4340 OopsInHeapRegionClosure* cl = _par_scan_state->evac_failure_closure(); | |
4341 uint queue_num = _par_scan_state->queue_num(); | |
4342 | |
4343 _evacuation_failed = true; | |
4344 _evacuation_failed_info_array[queue_num].register_copy_failure(old->size()); | |
342 | 4345 if (_evac_failure_closure != cl) { |
4346 MutexLockerEx x(EvacFailureStack_lock, Mutex::_no_safepoint_check_flag); | |
4347 assert(!_drain_in_progress, | |
4348 "Should only be true while someone holds the lock."); | |
4349 // Set the global evac-failure closure to the current thread's. | |
4350 assert(_evac_failure_closure == NULL, "Or locking has failed."); | |
4351 set_evac_failure_closure(cl); | |
4352 // Now do the common part. | |
4353 handle_evacuation_failure_common(old, m); | |
4354 // Reset to NULL. | |
4355 set_evac_failure_closure(NULL); | |
4356 } else { | |
4357 // The lock is already held, and this is recursive. | |
4358 assert(_drain_in_progress, "This should only be the recursive case."); | |
4359 handle_evacuation_failure_common(old, m); | |
4360 } | |
4361 return old; | |
4362 } 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
|
4363 // 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
|
4364 // 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
|
4365 // 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
|
4366 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
|
4367 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
|
4368 "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
|
4369 (HeapWord*) old, (HeapWord*) forward_ptr)); |
342 | 4370 return forward_ptr; |
4371 } | |
4372 } | |
4373 | |
4374 void G1CollectedHeap::handle_evacuation_failure_common(oop old, markOop m) { | |
4375 preserve_mark_if_necessary(old, m); | |
4376 | |
4377 HeapRegion* r = heap_region_containing(old); | |
4378 if (!r->evacuation_failed()) { | |
4379 r->set_evacuation_failed(true); | |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4380 _hr_printer.evac_failure(r); |
342 | 4381 } |
4382 | |
4383 push_on_evac_failure_scan_stack(old); | |
4384 | |
4385 if (!_drain_in_progress) { | |
4386 // prevent recursion in copy_to_survivor_space() | |
4387 _drain_in_progress = true; | |
4388 drain_evac_failure_scan_stack(); | |
4389 _drain_in_progress = false; | |
4390 } | |
4391 } | |
4392 | |
4393 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
|
4394 assert(evacuation_failed(), "Oversaving!"); |
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4395 // 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
|
4396 // case of a promotion failure. |
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4397 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
|
4398 _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
|
4399 _preserved_marks_of_objs.push(m); |
342 | 4400 } |
4401 } | |
4402 | |
4403 HeapWord* G1CollectedHeap::par_allocate_during_gc(GCAllocPurpose purpose, | |
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
4404 size_t word_size, |
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
4405 AllocationContext_t context) { |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4406 if (purpose == GCAllocForSurvived) { |
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
4407 HeapWord* result = survivor_attempt_allocation(word_size, context); |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4408 if (result != NULL) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4409 return result; |
342 | 4410 } else { |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4411 // 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
|
4412 // object there. |
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
4413 return old_attempt_allocation(word_size, context); |
342 | 4414 } |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4415 } else { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4416 assert(purpose == GCAllocForTenured, "sanity"); |
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
4417 HeapWord* result = old_attempt_allocation(word_size, context); |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4418 if (result != NULL) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4419 return result; |
342 | 4420 } else { |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4421 // 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
|
4422 // object there. |
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
4423 return survivor_attempt_allocation(word_size, context); |
342 | 4424 } |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4425 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4426 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4427 ShouldNotReachHere(); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4428 // 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
|
4429 return NULL; |
342 | 4430 } |
4431 | |
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4432 void G1ParCopyHelper::mark_object(oop obj) { |
20335
eec72fa4b108
8040722: G1: Clean up usages of heap_region_containing
brutisso
parents:
20334
diff
changeset
|
4433 assert(!_g1->heap_region_containing(obj)->in_collection_set(), "should not mark objects in the CSet"); |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4434 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4435 // 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
|
4436 _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
|
4437 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4438 |
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4439 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
|
4440 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
|
4441 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
|
4442 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
|
4443 |
20335
eec72fa4b108
8040722: G1: Clean up usages of heap_region_containing
brutisso
parents:
20334
diff
changeset
|
4444 assert(_g1->heap_region_containing(from_obj)->in_collection_set(), "from obj should be in the CSet"); |
eec72fa4b108
8040722: G1: Clean up usages of heap_region_containing
brutisso
parents:
20334
diff
changeset
|
4445 assert(!_g1->heap_region_containing(to_obj)->in_collection_set(), "should not mark objects in the CSet"); |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4446 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4447 // 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
|
4448 // 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
|
4449 // 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
|
4450 // image which we know should not be changing. |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4451 _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
|
4452 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4453 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4454 template <class T> |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4455 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
|
4456 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
|
4457 _scanned_klass->record_modified_oops(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4458 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4459 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4460 |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4461 template <G1Barrier barrier, G1Mark do_mark_object> |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4462 template <class T> |
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4463 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
|
4464 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
|
4465 |
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4466 if (oopDesc::is_null(heap_oop)) { |
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4467 return; |
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4468 } |
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4469 |
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4470 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
|
4471 |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4472 assert(_worker_id == _par_scan_state->queue_num(), "sanity"); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4473 |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4474 G1CollectedHeap::in_cset_state_t state = _g1->in_cset_state(obj); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4475 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4476 if (state == G1CollectedHeap::InCSet) { |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4477 oop forwardee; |
526 | 4478 if (obj->is_forwarded()) { |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4479 forwardee = obj->forwardee(); |
526 | 4480 } else { |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4481 forwardee = _par_scan_state->copy_to_survivor_space(obj); |
342 | 4482 } |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4483 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
|
4484 oopDesc::encode_store_heap_oop(p, forwardee); |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4485 if (do_mark_object != G1MarkNone && forwardee != obj) { |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4486 // 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
|
4487 // 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
|
4488 mark_forwarded_object(obj, forwardee); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4489 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4490 |
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4491 if (barrier == G1BarrierKlass) { |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4492 do_klass_barrier(p, forwardee); |
342 | 4493 } |
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4494 } else { |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4495 if (state == G1CollectedHeap::IsHumongous) { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4496 _g1->set_humongous_is_live(obj); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4497 } |
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4498 // The object is not in collection set. If we're a root scanning |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4499 // closure during an initial mark pause then attempt to mark the object. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4500 if (do_mark_object == G1MarkFromRoot) { |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4501 mark_object(obj); |
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4502 } |
526 | 4503 } |
4504 | |
17688
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4505 if (barrier == G1BarrierEvac) { |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4506 _par_scan_state->update_rs(_from, p, _worker_id); |
526 | 4507 } |
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4508 } |
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4509 |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4510 template void G1ParCopyClosure<G1BarrierEvac, G1MarkNone>::do_oop_work(oop* p); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4511 template void G1ParCopyClosure<G1BarrierEvac, G1MarkNone>::do_oop_work(narrowOop* p); |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4512 |
342 | 4513 class G1ParEvacuateFollowersClosure : public VoidClosure { |
4514 protected: | |
4515 G1CollectedHeap* _g1h; | |
4516 G1ParScanThreadState* _par_scan_state; | |
4517 RefToScanQueueSet* _queues; | |
4518 ParallelTaskTerminator* _terminator; | |
4519 | |
4520 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } | |
4521 RefToScanQueueSet* queues() { return _queues; } | |
4522 ParallelTaskTerminator* terminator() { return _terminator; } | |
4523 | |
4524 public: | |
4525 G1ParEvacuateFollowersClosure(G1CollectedHeap* g1h, | |
4526 G1ParScanThreadState* par_scan_state, | |
4527 RefToScanQueueSet* queues, | |
4528 ParallelTaskTerminator* terminator) | |
4529 : _g1h(g1h), _par_scan_state(par_scan_state), | |
4530 _queues(queues), _terminator(terminator) {} | |
4531 | |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4532 void do_void(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4533 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4534 private: |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4535 inline bool offer_termination(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4536 }; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4537 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4538 bool G1ParEvacuateFollowersClosure::offer_termination() { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4539 G1ParScanThreadState* const pss = par_scan_state(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4540 pss->start_term_time(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4541 const bool res = terminator()->offer_termination(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4542 pss->end_term_time(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4543 return res; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4544 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4545 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4546 void G1ParEvacuateFollowersClosure::do_void() { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4547 G1ParScanThreadState* const pss = par_scan_state(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4548 pss->trim_queue(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4549 do { |
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
4550 pss->steal_and_trim_queue(queues()); |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4551 } while (!offer_termination()); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4552 } |
342 | 4553 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4554 class G1KlassScanClosure : public KlassClosure { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4555 G1ParCopyHelper* _closure; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4556 bool _process_only_dirty; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4557 int _count; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4558 public: |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4559 G1KlassScanClosure(G1ParCopyHelper* closure, bool process_only_dirty) |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4560 : _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
|
4561 void do_klass(Klass* klass) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4562 // 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
|
4563 // 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
|
4564 if (!_process_only_dirty || klass->has_modified_oops()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4565 // 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
|
4566 klass->clear_modified_oops(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4567 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4568 // 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
|
4569 // 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
|
4570 _closure->set_scanned_klass(klass); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4571 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4572 klass->oops_do(_closure); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4573 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4574 _closure->set_scanned_klass(NULL); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4575 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4576 _count++; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4577 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4578 }; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4579 |
20494 | 4580 class G1CodeBlobClosure : public CodeBlobClosure { |
4581 class HeapRegionGatheringOopClosure : public OopClosure { | |
4582 G1CollectedHeap* _g1h; | |
4583 OopClosure* _work; | |
4584 nmethod* _nm; | |
4585 | |
4586 template <typename T> | |
4587 void do_oop_work(T* p) { | |
4588 _work->do_oop(p); | |
4589 T oop_or_narrowoop = oopDesc::load_heap_oop(p); | |
4590 if (!oopDesc::is_null(oop_or_narrowoop)) { | |
4591 oop o = oopDesc::decode_heap_oop_not_null(oop_or_narrowoop); | |
4592 HeapRegion* hr = _g1h->heap_region_containing_raw(o); | |
4593 assert(!_g1h->obj_in_cs(o) || hr->rem_set()->strong_code_roots_list_contains(_nm), "if o still in CS then evacuation failed and nm must already be in the remset"); | |
4594 hr->add_strong_code_root(_nm); | |
4595 } | |
4596 } | |
4597 | |
4598 public: | |
4599 HeapRegionGatheringOopClosure(OopClosure* oc) : _g1h(G1CollectedHeap::heap()), _work(oc), _nm(NULL) {} | |
4600 | |
4601 void do_oop(oop* o) { | |
4602 do_oop_work(o); | |
4603 } | |
4604 | |
4605 void do_oop(narrowOop* o) { | |
4606 do_oop_work(o); | |
4607 } | |
4608 | |
4609 void set_nm(nmethod* nm) { | |
4610 _nm = nm; | |
4611 } | |
4612 }; | |
4613 | |
4614 HeapRegionGatheringOopClosure _oc; | |
4615 public: | |
4616 G1CodeBlobClosure(OopClosure* oc) : _oc(oc) {} | |
4617 | |
4618 void do_code_blob(CodeBlob* cb) { | |
4619 nmethod* nm = cb->as_nmethod_or_null(); | |
4620 if (nm != NULL) { | |
4621 if (!nm->test_set_oops_do_mark()) { | |
4622 _oc.set_nm(nm); | |
4623 nm->oops_do(&_oc); | |
4624 nm->fix_oop_relocations(); | |
4625 } | |
4626 } | |
4627 } | |
4628 }; | |
4629 | |
342 | 4630 class G1ParTask : public AbstractGangTask { |
4631 protected: | |
4632 G1CollectedHeap* _g1h; | |
4633 RefToScanQueueSet *_queues; | |
4634 ParallelTaskTerminator _terminator; | |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
4635 uint _n_workers; |
342 | 4636 |
4637 Mutex _stats_lock; | |
4638 Mutex* stats_lock() { return &_stats_lock; } | |
4639 | |
4640 public: | |
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
4641 G1ParTask(G1CollectedHeap* g1h, RefToScanQueueSet *task_queues) |
342 | 4642 : AbstractGangTask("G1 collection"), |
4643 _g1h(g1h), | |
4644 _queues(task_queues), | |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4645 _terminator(0, _queues), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4646 _stats_lock(Mutex::leaf, "parallel G1 stats lock", true) |
342 | 4647 {} |
4648 | |
4649 RefToScanQueueSet* queues() { return _queues; } | |
4650 | |
4651 RefToScanQueue *work_queue(int i) { | |
4652 return queues()->queue(i); | |
4653 } | |
4654 | |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4655 ParallelTaskTerminator* terminator() { return &_terminator; } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4656 |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4657 virtual void set_for_termination(int active_workers) { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4658 // This task calls set_n_termination() in par_non_clean_card_iterate_work() |
bca17e38de00
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4659 // in the young space (_par_seq_tasks) in the G1 heap |
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|
4660 // for SequentialSubTasksDone. |
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|
4661 // This task also uses SubTasksDone in SharedHeap and G1CollectedHeap |
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|
4662 // both of which need setting by set_n_termination(). |
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|
4663 _g1h->SharedHeap::set_n_termination(active_workers); |
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|
4664 _g1h->set_n_termination(active_workers); |
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|
4665 terminator()->reset_for_reuse(active_workers); |
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|
4666 _n_workers = active_workers; |
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|
4667 } |
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|
4668 |
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|
4669 // Helps out with CLD processing. |
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|
4670 // |
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|
4671 // During InitialMark we need to: |
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|
4672 // 1) Scavenge all CLDs for the young GC. |
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4673 // 2) Mark all objects directly reachable from strong CLDs. |
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4674 template <G1Mark do_mark_object> |
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4675 class G1CLDClosure : public CLDClosure { |
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4676 G1ParCopyClosure<G1BarrierNone, do_mark_object>* _oop_closure; |
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4677 G1ParCopyClosure<G1BarrierKlass, do_mark_object> _oop_in_klass_closure; |
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4678 G1KlassScanClosure _klass_in_cld_closure; |
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|
4679 bool _claim; |
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|
4680 |
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|
4681 public: |
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|
4682 G1CLDClosure(G1ParCopyClosure<G1BarrierNone, do_mark_object>* oop_closure, |
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4683 bool only_young, bool claim) |
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|
4684 : _oop_closure(oop_closure), |
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4685 _oop_in_klass_closure(oop_closure->g1(), |
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|
4686 oop_closure->pss(), |
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|
4687 oop_closure->rp()), |
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|
4688 _klass_in_cld_closure(&_oop_in_klass_closure, only_young), |
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|
4689 _claim(claim) { |
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|
4690 |
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|
4691 } |
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|
4692 |
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|
4693 void do_cld(ClassLoaderData* cld) { |
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|
4694 cld->oops_do(_oop_closure, &_klass_in_cld_closure, _claim); |
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|
4695 } |
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|
4696 }; |
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|
4697 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
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4711
diff
changeset
|
4698 void work(uint worker_id) { |
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diff
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|
4699 if (worker_id >= _n_workers) return; // no work needed this round |
1611 | 4700 |
4701 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
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diff
changeset
|
4702 _g1h->g1_policy()->phase_times()->record_gc_worker_start_time(worker_id, start_time_ms); |
1611 | 4703 |
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|
4704 { |
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|
4705 ResourceMark rm; |
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|
4706 HandleMark hm; |
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|
4707 |
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|
4708 ReferenceProcessor* rp = _g1h->ref_processor_stw(); |
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|
4709 |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4710 G1ParScanThreadState pss(_g1h, worker_id, rp); |
5986
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|
4711 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, rp); |
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
4712 |
5986
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|
4713 pss.set_evac_failure_closure(&evac_failure_cl); |
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|
4714 |
20278
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|
4715 bool only_young = _g1h->g1_policy()->gcs_are_young(); |
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|
4716 |
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|
4717 // Non-IM young GC. |
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|
4718 G1ParCopyClosure<G1BarrierNone, G1MarkNone> scan_only_root_cl(_g1h, &pss, rp); |
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|
4719 G1CLDClosure<G1MarkNone> scan_only_cld_cl(&scan_only_root_cl, |
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|
4720 only_young, // Only process dirty klasses. |
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|
4721 false); // No need to claim CLDs. |
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|
4722 // IM young GC. |
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diff
changeset
|
4723 // Strong roots closures. |
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|
4724 G1ParCopyClosure<G1BarrierNone, G1MarkFromRoot> scan_mark_root_cl(_g1h, &pss, rp); |
2c6ef90f030a
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|
4725 G1CLDClosure<G1MarkFromRoot> scan_mark_cld_cl(&scan_mark_root_cl, |
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|
4726 false, // Process all klasses. |
2c6ef90f030a
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diff
changeset
|
4727 true); // Need to claim CLDs. |
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diff
changeset
|
4728 // Weak roots closures. |
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8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
4729 G1ParCopyClosure<G1BarrierNone, G1MarkPromotedFromRoot> scan_mark_weak_root_cl(_g1h, &pss, rp); |
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8049421: G1 Class Unloading after completing a concurrent mark cycle
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changeset
|
4730 G1CLDClosure<G1MarkPromotedFromRoot> scan_mark_weak_cld_cl(&scan_mark_weak_root_cl, |
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|
4731 false, // Process all klasses. |
2c6ef90f030a
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diff
changeset
|
4732 true); // Need to claim CLDs. |
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diff
changeset
|
4733 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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|
4734 G1CodeBlobClosure scan_only_code_cl(&scan_only_root_cl); |
2c6ef90f030a
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diff
changeset
|
4735 G1CodeBlobClosure scan_mark_code_cl(&scan_mark_root_cl); |
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diff
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|
4736 // IM Weak code roots are handled later. |
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diff
changeset
|
4737 |
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diff
changeset
|
4738 OopClosure* strong_root_cl; |
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diff
changeset
|
4739 OopClosure* weak_root_cl; |
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changeset
|
4740 CLDClosure* strong_cld_cl; |
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diff
changeset
|
4741 CLDClosure* weak_cld_cl; |
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|
4742 CodeBlobClosure* strong_code_cl; |
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diff
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|
4743 |
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diff
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|
4744 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
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diff
changeset
|
4745 // We also need to mark copied objects. |
20278
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|
4746 strong_root_cl = &scan_mark_root_cl; |
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|
4747 strong_cld_cl = &scan_mark_cld_cl; |
2c6ef90f030a
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diff
changeset
|
4748 strong_code_cl = &scan_mark_code_cl; |
20282
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
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20279
diff
changeset
|
4749 if (ClassUnloadingWithConcurrentMark) { |
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diff
changeset
|
4750 weak_root_cl = &scan_mark_weak_root_cl; |
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diff
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|
4751 weak_cld_cl = &scan_mark_weak_cld_cl; |
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diff
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|
4752 } else { |
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changeset
|
4753 weak_root_cl = &scan_mark_root_cl; |
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diff
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|
4754 weak_cld_cl = &scan_mark_cld_cl; |
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diff
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|
4755 } |
20278
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|
4756 } else { |
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|
4757 strong_root_cl = &scan_only_root_cl; |
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|
4758 weak_root_cl = &scan_only_root_cl; |
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|
4759 strong_cld_cl = &scan_only_cld_cl; |
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diff
changeset
|
4760 weak_cld_cl = &scan_only_cld_cl; |
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changeset
|
4761 strong_code_cl = &scan_only_code_cl; |
5986
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diff
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|
4762 } |
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diff
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|
4763 |
20278
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changeset
|
4764 |
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diff
changeset
|
4765 G1ParPushHeapRSClosure push_heap_rs_cl(_g1h, &pss); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4766 |
5986
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5963
diff
changeset
|
4767 pss.start_strong_roots(); |
20278
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diff
changeset
|
4768 _g1h->g1_process_roots(strong_root_cl, |
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diff
changeset
|
4769 weak_root_cl, |
2c6ef90f030a
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20274
diff
changeset
|
4770 &push_heap_rs_cl, |
2c6ef90f030a
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diff
changeset
|
4771 strong_cld_cl, |
2c6ef90f030a
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diff
changeset
|
4772 weak_cld_cl, |
2c6ef90f030a
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20274
diff
changeset
|
4773 strong_code_cl, |
2c6ef90f030a
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diff
changeset
|
4774 worker_id); |
2c6ef90f030a
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20274
diff
changeset
|
4775 |
5986
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5963
diff
changeset
|
4776 pss.end_strong_roots(); |
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diff
changeset
|
4777 |
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5963
diff
changeset
|
4778 { |
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5963
diff
changeset
|
4779 double start = os::elapsedTime(); |
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changeset
|
4780 G1ParEvacuateFollowersClosure evac(_g1h, &pss, _queues, &_terminator); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4781 evac.do_void(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4782 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
|
4783 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
|
4784 _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
|
4785 _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
|
4786 } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4787 _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
|
4788 _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
|
4789 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4790 if (ParallelGCVerbose) { |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4791 MutexLocker x(stats_lock()); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4792 pss.print_termination_stats(worker_id); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4793 } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4794 |
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
4795 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
|
4796 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4797 // 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
|
4798 // 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
|
4799 // "GC Worker Time". |
342 | 4800 } |
4801 | |
1611 | 4802 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
|
4803 _g1h->g1_policy()->phase_times()->record_gc_worker_end_time(worker_id, end_time_ms); |
342 | 4804 } |
4805 }; | |
4806 | |
4807 // *** Common G1 Evacuation Stuff | |
4808 | |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
4809 // This method is run in a GC worker. |
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
4810 |
342 | 4811 void |
4812 G1CollectedHeap:: | |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4813 g1_process_roots(OopClosure* scan_non_heap_roots, |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4814 OopClosure* scan_non_heap_weak_roots, |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4815 OopsInHeapRegionClosure* scan_rs, |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4816 CLDClosure* scan_strong_clds, |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4817 CLDClosure* scan_weak_clds, |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4818 CodeBlobClosure* scan_strong_code, |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4819 uint worker_i) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4820 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4821 // First scan the shared roots. |
342 | 4822 double ext_roots_start = os::elapsedTime(); |
4823 double closure_app_time_sec = 0.0; | |
4824 | |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4825 bool during_im = _g1h->g1_policy()->during_initial_mark_pause(); |
20282
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
stefank
parents:
20279
diff
changeset
|
4826 bool trace_metadata = during_im && ClassUnloadingWithConcurrentMark; |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4827 |
342 | 4828 BufferingOopClosure buf_scan_non_heap_roots(scan_non_heap_roots); |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4829 BufferingOopClosure buf_scan_non_heap_weak_roots(scan_non_heap_weak_roots); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4830 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4831 process_roots(false, // no scoping; this is parallel code |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4832 SharedHeap::SO_None, |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4833 &buf_scan_non_heap_roots, |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4834 &buf_scan_non_heap_weak_roots, |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4835 scan_strong_clds, |
20282
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
stefank
parents:
20279
diff
changeset
|
4836 // Unloading Initial Marks handle the weak CLDs separately. |
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
stefank
parents:
20279
diff
changeset
|
4837 (trace_metadata ? NULL : scan_weak_clds), |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4838 scan_strong_code); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4839 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4840 // 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
|
4841 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
|
4842 // We need to treat the discovered reference lists of the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4843 // concurrent mark ref processor as roots and keep entries |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4844 // (which are added by the marking threads) on them live |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4845 // until they can be processed at the end of marking. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4846 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
|
4847 } |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
4848 |
20282
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
stefank
parents:
20279
diff
changeset
|
4849 if (trace_metadata) { |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4850 // Barrier to make sure all workers passed |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4851 // the strong CLD and strong nmethods phases. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4852 active_strong_roots_scope()->wait_until_all_workers_done_with_threads(n_par_threads()); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4853 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4854 // Now take the complement of the strong CLDs. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4855 ClassLoaderDataGraph::roots_cld_do(NULL, scan_weak_clds); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4856 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4857 |
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
4858 // Finish up any enqueued closure apps (attributed as object copy time). |
342 | 4859 buf_scan_non_heap_roots.done(); |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4860 buf_scan_non_heap_weak_roots.done(); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4861 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4862 double obj_copy_time_sec = buf_scan_non_heap_roots.closure_app_seconds() |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4863 + buf_scan_non_heap_weak_roots.closure_app_seconds(); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4864 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4865 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
|
4866 |
342 | 4867 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
|
4868 ((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
|
4869 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4870 g1_policy()->phase_times()->record_ext_root_scan_time(worker_i, ext_root_time_ms); |
342 | 4871 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4872 // During conc marking we have to filter the per-thread SATB buffers |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4873 // to make sure we remove any oops into the CSet (which will show up |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4874 // as implicitly live). |
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
4875 double satb_filtering_ms = 0.0; |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4876 if (!_process_strong_tasks->is_task_claimed(G1H_PS_filter_satb_buffers)) { |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4877 if (mark_in_progress()) { |
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
4878 double satb_filter_start = os::elapsedTime(); |
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
4879 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4880 JavaThread::satb_mark_queue_set().filter_thread_buffers(); |
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
4881 |
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
4882 satb_filtering_ms = (os::elapsedTime() - satb_filter_start) * 1000.0; |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4883 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4884 } |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4885 g1_policy()->phase_times()->record_satb_filtering_time(worker_i, satb_filtering_ms); |
342 | 4886 |
4887 // Now scan the complement of the collection set. | |
20494 | 4888 G1CodeBlobClosure scavenge_cs_nmethods(scan_non_heap_weak_roots); |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4889 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4890 g1_rem_set()->oops_into_collection_set_do(scan_rs, &scavenge_cs_nmethods, worker_i); |
20256
b0b97602393a
8033923: Use BufferingOopClosure for G1 code root scanning
stefank
parents:
20254
diff
changeset
|
4891 |
342 | 4892 _process_strong_tasks->all_tasks_completed(); |
4893 } | |
4894 | |
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4895 class G1StringSymbolTableUnlinkTask : public AbstractGangTask { |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4896 private: |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4897 BoolObjectClosure* _is_alive; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4898 int _initial_string_table_size; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4899 int _initial_symbol_table_size; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4900 |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4901 bool _process_strings; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4902 int _strings_processed; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4903 int _strings_removed; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4904 |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4905 bool _process_symbols; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4906 int _symbols_processed; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4907 int _symbols_removed; |
17652
0eb64cfc0b76
8033443: Test8000311 fails after latest changes to parallelize string and symbol table unlink
tschatzl
parents:
17651
diff
changeset
|
4908 |
0eb64cfc0b76
8033443: Test8000311 fails after latest changes to parallelize string and symbol table unlink
tschatzl
parents:
17651
diff
changeset
|
4909 bool _do_in_parallel; |
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4910 public: |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4911 G1StringSymbolTableUnlinkTask(BoolObjectClosure* is_alive, bool process_strings, bool process_symbols) : |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4912 AbstractGangTask("String/Symbol Unlinking"), |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4913 _is_alive(is_alive), |
17652
0eb64cfc0b76
8033443: Test8000311 fails after latest changes to parallelize string and symbol table unlink
tschatzl
parents:
17651
diff
changeset
|
4914 _do_in_parallel(G1CollectedHeap::use_parallel_gc_threads()), |
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
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|
4915 _process_strings(process_strings), _strings_processed(0), _strings_removed(0), |
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4916 _process_symbols(process_symbols), _symbols_processed(0), _symbols_removed(0) { |
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|
4917 |
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|
4918 _initial_string_table_size = StringTable::the_table()->table_size(); |
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4919 _initial_symbol_table_size = SymbolTable::the_table()->table_size(); |
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|
4920 if (process_strings) { |
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|
4921 StringTable::clear_parallel_claimed_index(); |
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|
4922 } |
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|
4923 if (process_symbols) { |
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|
4924 SymbolTable::clear_parallel_claimed_index(); |
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|
4925 } |
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|
4926 } |
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|
4927 |
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|
4928 ~G1StringSymbolTableUnlinkTask() { |
17652
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|
4929 guarantee(!_process_strings || !_do_in_parallel || StringTable::parallel_claimed_index() >= _initial_string_table_size, |
17634
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|
4930 err_msg("claim value "INT32_FORMAT" after unlink less than initial string table size "INT32_FORMAT, |
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|
4931 StringTable::parallel_claimed_index(), _initial_string_table_size)); |
17652
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|
4932 guarantee(!_process_symbols || !_do_in_parallel || SymbolTable::parallel_claimed_index() >= _initial_symbol_table_size, |
17634
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|
4933 err_msg("claim value "INT32_FORMAT" after unlink less than initial symbol table size "INT32_FORMAT, |
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|
4934 SymbolTable::parallel_claimed_index(), _initial_symbol_table_size)); |
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4935 |
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|
4936 if (G1TraceStringSymbolTableScrubbing) { |
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|
4937 gclog_or_tty->print_cr("Cleaned string and symbol table, " |
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4938 "strings: "SIZE_FORMAT" processed, "SIZE_FORMAT" removed, " |
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4939 "symbols: "SIZE_FORMAT" processed, "SIZE_FORMAT" removed", |
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|
4940 strings_processed(), strings_removed(), |
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|
4941 symbols_processed(), symbols_removed()); |
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|
4942 } |
17634
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|
4943 } |
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|
4944 |
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|
4945 void work(uint worker_id) { |
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|
4946 if (_do_in_parallel) { |
17634
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|
4947 int strings_processed = 0; |
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|
4948 int strings_removed = 0; |
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|
4949 int symbols_processed = 0; |
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|
4950 int symbols_removed = 0; |
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|
4951 if (_process_strings) { |
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|
4952 StringTable::possibly_parallel_unlink(_is_alive, &strings_processed, &strings_removed); |
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|
4953 Atomic::add(strings_processed, &_strings_processed); |
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|
4954 Atomic::add(strings_removed, &_strings_removed); |
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|
4955 } |
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|
4956 if (_process_symbols) { |
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|
4957 SymbolTable::possibly_parallel_unlink(&symbols_processed, &symbols_removed); |
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|
4958 Atomic::add(symbols_processed, &_symbols_processed); |
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|
4959 Atomic::add(symbols_removed, &_symbols_removed); |
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|
4960 } |
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|
4961 } else { |
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|
4962 if (_process_strings) { |
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|
4963 StringTable::unlink(_is_alive, &_strings_processed, &_strings_removed); |
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|
4964 } |
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|
4965 if (_process_symbols) { |
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|
4966 SymbolTable::unlink(&_symbols_processed, &_symbols_removed); |
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|
4967 } |
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|
4968 } |
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|
4969 } |
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|
4970 |
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|
4971 size_t strings_processed() const { return (size_t)_strings_processed; } |
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|
4972 size_t strings_removed() const { return (size_t)_strings_removed; } |
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|
4973 |
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|
4974 size_t symbols_processed() const { return (size_t)_symbols_processed; } |
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|
4975 size_t symbols_removed() const { return (size_t)_symbols_removed; } |
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|
4976 }; |
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|
4977 |
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|
4978 class G1CodeCacheUnloadingTask VALUE_OBJ_CLASS_SPEC { |
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|
4979 private: |
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|
4980 static Monitor* _lock; |
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|
4981 |
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|
4982 BoolObjectClosure* const _is_alive; |
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|
4983 const bool _unloading_occurred; |
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|
4984 const uint _num_workers; |
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|
4985 |
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|
4986 // Variables used to claim nmethods. |
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|
4987 nmethod* _first_nmethod; |
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|
4988 volatile nmethod* _claimed_nmethod; |
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|
4989 |
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|
4990 // The list of nmethods that need to be processed by the second pass. |
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|
4991 volatile nmethod* _postponed_list; |
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|
4992 volatile uint _num_entered_barrier; |
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|
4993 |
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|
4994 public: |
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|
4995 G1CodeCacheUnloadingTask(uint num_workers, BoolObjectClosure* is_alive, bool unloading_occurred) : |
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|
4996 _is_alive(is_alive), |
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|
4997 _unloading_occurred(unloading_occurred), |
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|
4998 _num_workers(num_workers), |
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changeset
|
4999 _first_nmethod(NULL), |
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changeset
|
5000 _claimed_nmethod(NULL), |
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changeset
|
5001 _postponed_list(NULL), |
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changeset
|
5002 _num_entered_barrier(0) |
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|
5003 { |
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changeset
|
5004 nmethod::increase_unloading_clock(); |
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|
5005 _first_nmethod = CodeCache::alive_nmethod(CodeCache::first()); |
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|
5006 _claimed_nmethod = (volatile nmethod*)_first_nmethod; |
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|
5007 } |
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|
5008 |
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|
5009 ~G1CodeCacheUnloadingTask() { |
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|
5010 CodeCache::verify_clean_inline_caches(); |
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|
5011 |
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|
5012 CodeCache::set_needs_cache_clean(false); |
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|
5013 guarantee(CodeCache::scavenge_root_nmethods() == NULL, "Must be"); |
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|
5014 |
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|
5015 CodeCache::verify_icholder_relocations(); |
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|
5016 } |
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|
5017 |
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|
5018 private: |
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|
5019 void add_to_postponed_list(nmethod* nm) { |
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|
5020 nmethod* old; |
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|
5021 do { |
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|
5022 old = (nmethod*)_postponed_list; |
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|
5023 nm->set_unloading_next(old); |
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|
5024 } while ((nmethod*)Atomic::cmpxchg_ptr(nm, &_postponed_list, old) != old); |
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|
5025 } |
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changeset
|
5026 |
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|
5027 void clean_nmethod(nmethod* nm) { |
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changeset
|
5028 bool postponed = nm->do_unloading_parallel(_is_alive, _unloading_occurred); |
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changeset
|
5029 |
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diff
changeset
|
5030 if (postponed) { |
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changeset
|
5031 // This nmethod referred to an nmethod that has not been cleaned/unloaded yet. |
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|
5032 add_to_postponed_list(nm); |
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|
5033 } |
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changeset
|
5034 |
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changeset
|
5035 // Mark that this thread has been cleaned/unloaded. |
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|
5036 // After this call, it will be safe to ask if this nmethod was unloaded or not. |
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|
5037 nm->set_unloading_clock(nmethod::global_unloading_clock()); |
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|
5038 } |
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changeset
|
5039 |
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|
5040 void clean_nmethod_postponed(nmethod* nm) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
5041 nm->do_unloading_parallel_postponed(_is_alive, _unloading_occurred); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5042 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5043 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5044 static const int MaxClaimNmethods = 16; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5045 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5046 void claim_nmethods(nmethod** claimed_nmethods, int *num_claimed_nmethods) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5047 nmethod* first; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5048 nmethod* last; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5049 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5050 do { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5051 *num_claimed_nmethods = 0; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5052 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5053 first = last = (nmethod*)_claimed_nmethod; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5054 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5055 if (first != NULL) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5056 for (int i = 0; i < MaxClaimNmethods; i++) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5057 last = CodeCache::alive_nmethod(CodeCache::next(last)); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5058 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5059 if (last == NULL) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5060 break; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5061 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5062 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5063 claimed_nmethods[i] = last; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5064 (*num_claimed_nmethods)++; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5065 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5066 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5067 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5068 } while ((nmethod*)Atomic::cmpxchg_ptr(last, &_claimed_nmethod, first) != first); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5069 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5070 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5071 nmethod* claim_postponed_nmethod() { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5072 nmethod* claim; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5073 nmethod* next; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5074 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5075 do { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5076 claim = (nmethod*)_postponed_list; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5077 if (claim == NULL) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5078 return NULL; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5079 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5080 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5081 next = claim->unloading_next(); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5082 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5083 } while ((nmethod*)Atomic::cmpxchg_ptr(next, &_postponed_list, claim) != claim); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5084 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5085 return claim; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5086 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5087 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5088 public: |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5089 // Mark that we're done with the first pass of nmethod cleaning. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5090 void barrier_mark(uint worker_id) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5091 MonitorLockerEx ml(_lock, Mutex::_no_safepoint_check_flag); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5092 _num_entered_barrier++; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5093 if (_num_entered_barrier == _num_workers) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5094 ml.notify_all(); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5095 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5096 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5097 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5098 // See if we have to wait for the other workers to |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5099 // finish their first-pass nmethod cleaning work. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5100 void barrier_wait(uint worker_id) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5101 if (_num_entered_barrier < _num_workers) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5102 MonitorLockerEx ml(_lock, Mutex::_no_safepoint_check_flag); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5103 while (_num_entered_barrier < _num_workers) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5104 ml.wait(Mutex::_no_safepoint_check_flag, 0, false); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5105 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5106 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5107 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5108 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5109 // Cleaning and unloading of nmethods. Some work has to be postponed |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5110 // to the second pass, when we know which nmethods survive. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5111 void work_first_pass(uint worker_id) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5112 // The first nmethods is claimed by the first worker. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5113 if (worker_id == 0 && _first_nmethod != NULL) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5114 clean_nmethod(_first_nmethod); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5115 _first_nmethod = NULL; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5116 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5117 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5118 int num_claimed_nmethods; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5119 nmethod* claimed_nmethods[MaxClaimNmethods]; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5120 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5121 while (true) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5122 claim_nmethods(claimed_nmethods, &num_claimed_nmethods); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5123 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5124 if (num_claimed_nmethods == 0) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5125 break; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5126 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5127 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5128 for (int i = 0; i < num_claimed_nmethods; i++) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5129 clean_nmethod(claimed_nmethods[i]); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5130 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5131 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5132 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5133 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5134 void work_second_pass(uint worker_id) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5135 nmethod* nm; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5136 // Take care of postponed nmethods. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5137 while ((nm = claim_postponed_nmethod()) != NULL) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5138 clean_nmethod_postponed(nm); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5139 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5140 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5141 }; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5142 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5143 Monitor* G1CodeCacheUnloadingTask::_lock = new Monitor(Mutex::leaf, "Code Cache Unload lock"); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5144 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5145 class G1KlassCleaningTask : public StackObj { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5146 BoolObjectClosure* _is_alive; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5147 volatile jint _clean_klass_tree_claimed; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5148 ClassLoaderDataGraphKlassIteratorAtomic _klass_iterator; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5149 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5150 public: |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5151 G1KlassCleaningTask(BoolObjectClosure* is_alive) : |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5152 _is_alive(is_alive), |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5153 _clean_klass_tree_claimed(0), |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5154 _klass_iterator() { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5155 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5156 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5157 private: |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5158 bool claim_clean_klass_tree_task() { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5159 if (_clean_klass_tree_claimed) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5160 return false; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5161 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5162 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5163 return Atomic::cmpxchg(1, (jint*)&_clean_klass_tree_claimed, 0) == 0; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5164 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5165 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5166 InstanceKlass* claim_next_klass() { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5167 Klass* klass; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5168 do { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5169 klass =_klass_iterator.next_klass(); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5170 } while (klass != NULL && !klass->oop_is_instance()); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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|
5171 |
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5172 return (InstanceKlass*)klass; |
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|
5173 } |
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|
5174 |
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|
5175 public: |
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|
5176 |
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|
5177 void clean_klass(InstanceKlass* ik) { |
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|
5178 ik->clean_implementors_list(_is_alive); |
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5179 ik->clean_method_data(_is_alive); |
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|
5180 |
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|
5181 // G1 specific cleanup work that has |
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5182 // been moved here to be done in parallel. |
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|
5183 ik->clean_dependent_nmethods(); |
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|
5184 } |
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|
5185 |
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|
5186 void work() { |
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|
5187 ResourceMark rm; |
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|
5188 |
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5189 // One worker will clean the subklass/sibling klass tree. |
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5190 if (claim_clean_klass_tree_task()) { |
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5191 Klass::clean_subklass_tree(_is_alive); |
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|
5192 } |
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|
5193 |
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5194 // All workers will help cleaning the classes, |
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|
5195 InstanceKlass* klass; |
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5196 while ((klass = claim_next_klass()) != NULL) { |
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|
5197 clean_klass(klass); |
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|
5198 } |
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|
5199 } |
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|
5200 }; |
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|
5201 |
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|
5202 // To minimize the remark pause times, the tasks below are done in parallel. |
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5203 class G1ParallelCleaningTask : public AbstractGangTask { |
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5204 private: |
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|
5205 G1StringSymbolTableUnlinkTask _string_symbol_task; |
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5206 G1CodeCacheUnloadingTask _code_cache_task; |
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5207 G1KlassCleaningTask _klass_cleaning_task; |
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|
5208 |
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|
5209 public: |
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|
5210 // The constructor is run in the VMThread. |
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|
5211 G1ParallelCleaningTask(BoolObjectClosure* is_alive, bool process_strings, bool process_symbols, uint num_workers, bool unloading_occurred) : |
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|
5212 AbstractGangTask("Parallel Cleaning"), |
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|
5213 _string_symbol_task(is_alive, process_strings, process_symbols), |
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5214 _code_cache_task(num_workers, is_alive, unloading_occurred), |
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|
5215 _klass_cleaning_task(is_alive) { |
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|
5216 } |
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|
5217 |
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|
5218 // The parallel work done by all worker threads. |
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|
5219 void work(uint worker_id) { |
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|
5220 // Do first pass of code cache cleaning. |
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|
5221 _code_cache_task.work_first_pass(worker_id); |
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|
5222 |
20279 | 5223 // Let the threads mark that the first pass is done. |
20278
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5224 _code_cache_task.barrier_mark(worker_id); |
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|
5225 |
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|
5226 // Clean the Strings and Symbols. |
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|
5227 _string_symbol_task.work(worker_id); |
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|
5228 |
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|
5229 // Wait for all workers to finish the first code cache cleaning pass. |
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|
5230 _code_cache_task.barrier_wait(worker_id); |
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|
5231 |
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|
5232 // Do the second code cache cleaning work, which realize on |
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|
5233 // the liveness information gathered during the first pass. |
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|
5234 _code_cache_task.work_second_pass(worker_id); |
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|
5235 |
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diff
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|
5236 // Clean all klasses that were not unloaded. |
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|
5237 _klass_cleaning_task.work(); |
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|
5238 } |
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diff
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|
5239 }; |
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|
5240 |
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|
5241 |
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|
5242 void G1CollectedHeap::parallel_cleaning(BoolObjectClosure* is_alive, |
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|
5243 bool process_strings, |
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diff
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|
5244 bool process_symbols, |
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|
5245 bool class_unloading_occurred) { |
17634
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diff
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|
5246 uint n_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
20278
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|
5247 workers()->active_workers() : 1); |
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changeset
|
5248 |
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|
5249 G1ParallelCleaningTask g1_unlink_task(is_alive, process_strings, process_symbols, |
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|
5250 n_workers, class_unloading_occurred); |
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|
5251 if (G1CollectedHeap::use_parallel_gc_threads()) { |
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diff
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|
5252 set_par_threads(n_workers); |
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|
5253 workers()->run_task(&g1_unlink_task); |
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diff
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|
5254 set_par_threads(0); |
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diff
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|
5255 } else { |
5a32d2a3cc1e
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|
5256 g1_unlink_task.work(0); |
5a32d2a3cc1e
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|
5257 } |
20278
2c6ef90f030a
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diff
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|
5258 } |
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changeset
|
5259 |
2c6ef90f030a
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diff
changeset
|
5260 void G1CollectedHeap::unlink_string_and_symbol_table(BoolObjectClosure* is_alive, |
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|
5261 bool process_strings, bool process_symbols) { |
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diff
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|
5262 { |
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diff
changeset
|
5263 uint n_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
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changeset
|
5264 _g1h->workers()->active_workers() : 1); |
2c6ef90f030a
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changeset
|
5265 G1StringSymbolTableUnlinkTask g1_unlink_task(is_alive, process_strings, process_symbols); |
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|
5266 if (G1CollectedHeap::use_parallel_gc_threads()) { |
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|
5267 set_par_threads(n_workers); |
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changeset
|
5268 workers()->run_task(&g1_unlink_task); |
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changeset
|
5269 set_par_threads(0); |
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diff
changeset
|
5270 } else { |
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|
5271 g1_unlink_task.work(0); |
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|
5272 } |
17634
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diff
changeset
|
5273 } |
17764 | 5274 |
5275 if (G1StringDedup::is_enabled()) { | |
5276 G1StringDedup::unlink(is_alive); | |
5277 } | |
17634
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|
5278 } |
5a32d2a3cc1e
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diff
changeset
|
5279 |
20216
570cb6369f17
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diff
changeset
|
5280 class G1RedirtyLoggedCardsTask : public AbstractGangTask { |
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diff
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|
5281 private: |
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diff
changeset
|
5282 DirtyCardQueueSet* _queue; |
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diff
changeset
|
5283 public: |
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diff
changeset
|
5284 G1RedirtyLoggedCardsTask(DirtyCardQueueSet* queue) : AbstractGangTask("Redirty Cards"), _queue(queue) { } |
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
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diff
changeset
|
5285 |
570cb6369f17
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diff
changeset
|
5286 virtual void work(uint worker_id) { |
570cb6369f17
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tschatzl
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diff
changeset
|
5287 double start_time = os::elapsedTime(); |
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diff
changeset
|
5288 |
20217
6b52700a896b
8040002: Clean up code and code duplication in re-diryting cards for verification
tschatzl
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20216
diff
changeset
|
5289 RedirtyLoggedCardTableEntryClosure cl; |
20216
570cb6369f17
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diff
changeset
|
5290 if (G1CollectedHeap::heap()->use_parallel_gc_threads()) { |
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tschatzl
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diff
changeset
|
5291 _queue->par_apply_closure_to_all_completed_buffers(&cl); |
570cb6369f17
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tschatzl
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diff
changeset
|
5292 } else { |
570cb6369f17
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diff
changeset
|
5293 _queue->apply_closure_to_all_completed_buffers(&cl); |
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
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changeset
|
5294 } |
570cb6369f17
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diff
changeset
|
5295 |
570cb6369f17
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diff
changeset
|
5296 G1GCPhaseTimes* timer = G1CollectedHeap::heap()->g1_policy()->phase_times(); |
570cb6369f17
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tschatzl
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changeset
|
5297 timer->record_redirty_logged_cards_time_ms(worker_id, (os::elapsedTime() - start_time) * 1000.0); |
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tschatzl
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diff
changeset
|
5298 timer->record_redirty_logged_cards_processed_cards(worker_id, cl.num_processed()); |
570cb6369f17
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tschatzl
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diff
changeset
|
5299 } |
17756
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
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17755
diff
changeset
|
5300 }; |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5301 |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5302 void G1CollectedHeap::redirty_logged_cards() { |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5303 double redirty_logged_cards_start = os::elapsedTime(); |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5304 |
20216
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5305 uint n_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5306 _g1h->workers()->active_workers() : 1); |
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5307 |
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5308 G1RedirtyLoggedCardsTask redirty_task(&dirty_card_queue_set()); |
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5309 dirty_card_queue_set().reset_for_par_iteration(); |
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5310 if (use_parallel_gc_threads()) { |
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5311 set_par_threads(n_workers); |
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5312 workers()->run_task(&redirty_task); |
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5313 set_par_threads(0); |
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5314 } else { |
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5315 redirty_task.work(0); |
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5316 } |
17756
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5317 |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5318 DirtyCardQueueSet& dcq = JavaThread::dirty_card_queue_set(); |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5319 dcq.merge_bufferlists(&dirty_card_queue_set()); |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5320 assert(dirty_card_queue_set().completed_buffers_num() == 0, "All should be consumed"); |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5321 |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5322 g1_policy()->phase_times()->record_redirty_logged_cards_time_ms((os::elapsedTime() - redirty_logged_cards_start) * 1000.0); |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5323 } |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5324 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5325 // Weak Reference Processing support |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5326 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5327 // An always "is_alive" closure that is used to preserve referents. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5328 // 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
|
5329 // of referent objects that are pointed to by reference objects |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5330 // discovered by the CM ref processor. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5331 class G1AlwaysAliveClosure: public BoolObjectClosure { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5332 G1CollectedHeap* _g1; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5333 public: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5334 G1AlwaysAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5335 bool do_object_b(oop p) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5336 if (p != NULL) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5337 return true; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5338 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5339 return false; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5340 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5341 }; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5342 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5343 bool G1STWIsAliveClosure::do_object_b(oop p) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5344 // An object is reachable if it is outside the collection set, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5345 // or is inside and copied. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5346 return !_g1->obj_in_cs(p) || p->is_forwarded(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5347 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5348 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5349 // Non Copying Keep Alive closure |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5350 class G1KeepAliveClosure: public OopClosure { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5351 G1CollectedHeap* _g1; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5352 public: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5353 G1KeepAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5354 void do_oop(narrowOop* p) { guarantee(false, "Not needed"); } |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5355 void do_oop(oop* p) { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5356 oop obj = *p; |
20503
fa56205f142c
8057799: Unnecessary NULL check in G1KeepAliveClosure
tonyp
parents:
20494
diff
changeset
|
5357 assert(obj != NULL, "the caller should have filtered out NULL values"); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5358 |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5359 G1CollectedHeap::in_cset_state_t cset_state = _g1->in_cset_state(obj); |
20503
fa56205f142c
8057799: Unnecessary NULL check in G1KeepAliveClosure
tonyp
parents:
20494
diff
changeset
|
5360 if (cset_state == G1CollectedHeap::InNeither) { |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5361 return; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5362 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5363 if (cset_state == G1CollectedHeap::InCSet) { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5364 assert( obj->is_forwarded(), "invariant" ); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5365 *p = obj->forwardee(); |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5366 } else { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5367 assert(!obj->is_forwarded(), "invariant" ); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5368 assert(cset_state == G1CollectedHeap::IsHumongous, |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5369 err_msg("Only allowed InCSet state is IsHumongous, but is %d", cset_state)); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5370 _g1->set_humongous_is_live(obj); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5371 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5372 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5373 }; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5374 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5375 // Copying Keep Alive closure - can be called from both |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5376 // serial and parallel code as long as different worker |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5377 // threads utilize different G1ParScanThreadState instances |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5378 // and different queues. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5379 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5380 class G1CopyingKeepAliveClosure: public OopClosure { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5381 G1CollectedHeap* _g1h; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5382 OopClosure* _copy_non_heap_obj_cl; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5383 G1ParScanThreadState* _par_scan_state; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5384 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5385 public: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5386 G1CopyingKeepAliveClosure(G1CollectedHeap* g1h, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5387 OopClosure* non_heap_obj_cl, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5388 G1ParScanThreadState* pss): |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5389 _g1h(g1h), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5390 _copy_non_heap_obj_cl(non_heap_obj_cl), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5391 _par_scan_state(pss) |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5392 {} |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5393 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5394 virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5395 virtual void do_oop( oop* p) { do_oop_work(p); } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5396 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5397 template <class T> void do_oop_work(T* p) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5398 oop obj = oopDesc::load_decode_heap_oop(p); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5399 |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5400 if (_g1h->is_in_cset_or_humongous(obj)) { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5401 // If the referent object has been forwarded (either copied |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5402 // 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
|
5403 // evacuation failure) then we need to update the reference |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5404 // field and, if both reference and referent are in the G1 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5405 // heap, update the RSet for the referent. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5406 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5407 // 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
|
5408 // it alive by policy. Therefore we have copy the referent. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5409 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5410 // If the reference field is in the G1 heap then we can push |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5411 // on the PSS queue. When the queue is drained (after each |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5412 // phase of reference processing) the object and it's followers |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5413 // will be copied, the reference field set to point to the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5414 // new location, and the RSet updated. Otherwise we need to |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5415 // use the the non-heap or metadata closures directly to copy |
10405 | 5416 // the referent object and update the pointer, while avoiding |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5417 // updating the RSet. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5418 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5419 if (_g1h->is_in_g1_reserved(p)) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5420 _par_scan_state->push_on_queue(p); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5421 } else { |
17935
7384f6a12fc1
8038212: Method::is_valid_method() check has performance regression impact for stackwalking
coleenp
parents:
17866
diff
changeset
|
5422 assert(!Metaspace::contains((const void*)p), |
20270
b7d24d2bc8be
8047323: Remove unused _copy_metadata_obj_cl in G1CopyingKeepAliveClosure
stefank
parents:
20257
diff
changeset
|
5423 err_msg("Unexpectedly found a pointer from metadata: " |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5424 PTR_FORMAT, p)); |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5425 _copy_non_heap_obj_cl->do_oop(p); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5426 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5427 } |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5428 } |
3979
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parents:
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diff
changeset
|
5429 }; |
4dfb2df418f2
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parents:
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diff
changeset
|
5430 |
4dfb2df418f2
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parents:
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diff
changeset
|
5431 // Serial drain queue closure. Called as the 'complete_gc' |
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parents:
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diff
changeset
|
5432 // closure for each discovered list in some of the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5433 // reference processing phases. |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5434 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5435 class G1STWDrainQueueClosure: public VoidClosure { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5436 protected: |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5437 G1CollectedHeap* _g1h; |
4dfb2df418f2
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parents:
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diff
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|
5438 G1ParScanThreadState* _par_scan_state; |
4dfb2df418f2
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parents:
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diff
changeset
|
5439 |
4dfb2df418f2
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parents:
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diff
changeset
|
5440 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } |
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parents:
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diff
changeset
|
5441 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5442 public: |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5443 G1STWDrainQueueClosure(G1CollectedHeap* g1h, G1ParScanThreadState* pss) : |
4dfb2df418f2
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parents:
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diff
changeset
|
5444 _g1h(g1h), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5445 _par_scan_state(pss) |
4dfb2df418f2
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parents:
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diff
changeset
|
5446 { } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5447 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5448 void do_void() { |
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parents:
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diff
changeset
|
5449 G1ParScanThreadState* const pss = par_scan_state(); |
4dfb2df418f2
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diff
changeset
|
5450 pss->trim_queue(); |
4dfb2df418f2
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parents:
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diff
changeset
|
5451 } |
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parents:
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diff
changeset
|
5452 }; |
4dfb2df418f2
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parents:
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diff
changeset
|
5453 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5454 // Parallel Reference Processing closures |
4dfb2df418f2
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parents:
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diff
changeset
|
5455 |
4dfb2df418f2
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parents:
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diff
changeset
|
5456 // Implementation of AbstractRefProcTaskExecutor for parallel reference |
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parents:
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diff
changeset
|
5457 // processing during G1 evacuation pauses. |
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parents:
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diff
changeset
|
5458 |
4dfb2df418f2
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|
5459 class G1STWRefProcTaskExecutor: public AbstractRefProcTaskExecutor { |
4dfb2df418f2
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parents:
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diff
changeset
|
5460 private: |
4dfb2df418f2
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parents:
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diff
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|
5461 G1CollectedHeap* _g1h; |
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parents:
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diff
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|
5462 RefToScanQueueSet* _queues; |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
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|
5463 FlexibleWorkGang* _workers; |
3979
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parents:
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|
5464 int _active_workers; |
4dfb2df418f2
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parents:
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diff
changeset
|
5465 |
4dfb2df418f2
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parents:
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diff
changeset
|
5466 public: |
4dfb2df418f2
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parents:
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diff
changeset
|
5467 G1STWRefProcTaskExecutor(G1CollectedHeap* g1h, |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
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diff
changeset
|
5468 FlexibleWorkGang* workers, |
3979
4dfb2df418f2
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parents:
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diff
changeset
|
5469 RefToScanQueueSet *task_queues, |
4dfb2df418f2
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parents:
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diff
changeset
|
5470 int n_workers) : |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5471 _g1h(g1h), |
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parents:
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diff
changeset
|
5472 _queues(task_queues), |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5473 _workers(workers), |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5474 _active_workers(n_workers) |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5475 { |
4dfb2df418f2
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parents:
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diff
changeset
|
5476 assert(n_workers > 0, "shouldn't call this otherwise"); |
4dfb2df418f2
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parents:
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diff
changeset
|
5477 } |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5478 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5479 // Executes the given task using concurrent marking worker threads. |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5480 virtual void execute(ProcessTask& task); |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5481 virtual void execute(EnqueueTask& task); |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5482 }; |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5483 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5484 // Gang task for possibly parallel reference processing |
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
5485 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5486 class G1STWRefProcTaskProxy: public AbstractGangTask { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5487 typedef AbstractRefProcTaskExecutor::ProcessTask ProcessTask; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5488 ProcessTask& _proc_task; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5489 G1CollectedHeap* _g1h; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5490 RefToScanQueueSet *_task_queues; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5491 ParallelTaskTerminator* _terminator; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5492 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5493 public: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5494 G1STWRefProcTaskProxy(ProcessTask& proc_task, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5495 G1CollectedHeap* g1h, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5496 RefToScanQueueSet *task_queues, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5497 ParallelTaskTerminator* terminator) : |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5498 AbstractGangTask("Process reference objects in parallel"), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5499 _proc_task(proc_task), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5500 _g1h(g1h), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5501 _task_queues(task_queues), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5502 _terminator(terminator) |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5503 {} |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5504 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5505 virtual void work(uint worker_id) { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5506 // The reference processing task executed by a single worker. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5507 ResourceMark rm; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5508 HandleMark hm; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5509 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5510 G1STWIsAliveClosure is_alive(_g1h); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5511 |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5512 G1ParScanThreadState pss(_g1h, worker_id, NULL); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5513 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
5514 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5515 pss.set_evac_failure_closure(&evac_failure_cl); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5516 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5517 G1ParScanExtRootClosure only_copy_non_heap_cl(_g1h, &pss, NULL); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5518 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5519 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5520 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5521 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
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 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5524 // We also need to mark copied objects. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5525 copy_non_heap_cl = ©_mark_non_heap_cl; |
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 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5528 // Keep alive closure. |
20270
b7d24d2bc8be
8047323: Remove unused _copy_metadata_obj_cl in G1CopyingKeepAliveClosure
stefank
parents:
20257
diff
changeset
|
5529 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, &pss); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5530 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5531 // Complete GC closure |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5532 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _task_queues, _terminator); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5533 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5534 // 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
|
5535 _proc_task.work(worker_id, is_alive, keep_alive, drain_queue); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5536 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5537 // Note we cannot assert that the refs array is empty here as not all |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5538 // of the processing tasks (specifically phase2 - pp2_work) execute |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5539 // the complete_gc closure (which ordinarily would drain the queue) so |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5540 // the queue may not be empty. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5541 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5542 }; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5543 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5544 // Driver routine for parallel reference processing. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5545 // Creates an instance of the ref processing gang |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5546 // task and has the worker threads execute it. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5547 void G1STWRefProcTaskExecutor::execute(ProcessTask& proc_task) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5548 assert(_workers != NULL, "Need parallel worker threads."); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5549 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5550 ParallelTaskTerminator terminator(_active_workers, _queues); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5551 G1STWRefProcTaskProxy proc_task_proxy(proc_task, _g1h, _queues, &terminator); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5552 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5553 _g1h->set_par_threads(_active_workers); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5554 _workers->run_task(&proc_task_proxy); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5555 _g1h->set_par_threads(0); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5556 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5557 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5558 // Gang task for parallel reference enqueueing. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5559 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
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5560 class G1STWRefEnqueueTaskProxy: public AbstractGangTask { |
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5561 typedef AbstractRefProcTaskExecutor::EnqueueTask EnqueueTask; |
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|
5562 EnqueueTask& _enq_task; |
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|
5563 |
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|
5564 public: |
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|
5565 G1STWRefEnqueueTaskProxy(EnqueueTask& enq_task) : |
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|
5566 AbstractGangTask("Enqueue reference objects in parallel"), |
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|
5567 _enq_task(enq_task) |
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|
5568 { } |
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|
5569 |
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|
5570 virtual void work(uint worker_id) { |
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|
5571 _enq_task.work(worker_id); |
3979
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|
5572 } |
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|
5573 }; |
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|
5574 |
10405 | 5575 // Driver routine for parallel reference enqueueing. |
3979
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|
5576 // Creates an instance of the ref enqueueing gang |
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diff
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|
5577 // task and has the worker threads execute it. |
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|
5578 |
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|
5579 void G1STWRefProcTaskExecutor::execute(EnqueueTask& enq_task) { |
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|
5580 assert(_workers != NULL, "Need parallel worker threads."); |
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changeset
|
5581 |
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|
5582 G1STWRefEnqueueTaskProxy enq_task_proxy(enq_task); |
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|
5583 |
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|
5584 _g1h->set_par_threads(_active_workers); |
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|
5585 _workers->run_task(&enq_task_proxy); |
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|
5586 _g1h->set_par_threads(0); |
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|
5587 } |
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|
5588 |
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|
5589 // End of weak reference support closures |
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|
5590 |
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|
5591 // Abstract task used to preserve (i.e. copy) any referent objects |
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5592 // that are in the collection set and are pointed to by reference |
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5593 // objects discovered by the CM ref processor. |
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|
5594 |
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|
5595 class G1ParPreserveCMReferentsTask: public AbstractGangTask { |
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|
5596 protected: |
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|
5597 G1CollectedHeap* _g1h; |
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|
5598 RefToScanQueueSet *_queues; |
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|
5599 ParallelTaskTerminator _terminator; |
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|
5600 uint _n_workers; |
3979
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|
5601 |
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|
5602 public: |
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|
5603 G1ParPreserveCMReferentsTask(G1CollectedHeap* g1h,int workers, RefToScanQueueSet *task_queues) : |
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|
5604 AbstractGangTask("ParPreserveCMReferents"), |
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|
5605 _g1h(g1h), |
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|
5606 _queues(task_queues), |
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|
5607 _terminator(workers, _queues), |
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|
5608 _n_workers(workers) |
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|
5609 { } |
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|
5610 |
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|
5611 void work(uint worker_id) { |
3979
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|
5612 ResourceMark rm; |
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|
5613 HandleMark hm; |
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|
5614 |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
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17688
diff
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|
5615 G1ParScanThreadState pss(_g1h, worker_id, NULL); |
3979
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|
5616 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
5617 |
3979
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|
5618 pss.set_evac_failure_closure(&evac_failure_cl); |
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|
5619 |
20224
a2328cbebb23
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tschatzl
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20223
diff
changeset
|
5620 assert(pss.queue_is_empty(), "both queue and overflow should be empty"); |
3979
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|
5621 |
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|
5622 G1ParScanExtRootClosure only_copy_non_heap_cl(_g1h, &pss, NULL); |
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changeset
|
5623 |
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diff
changeset
|
5624 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
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changeset
|
5625 |
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diff
changeset
|
5626 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
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changeset
|
5627 |
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diff
changeset
|
5628 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
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parents:
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diff
changeset
|
5629 // We also need to mark copied objects. |
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parents:
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diff
changeset
|
5630 copy_non_heap_cl = ©_mark_non_heap_cl; |
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diff
changeset
|
5631 } |
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parents:
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diff
changeset
|
5632 |
4dfb2df418f2
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diff
changeset
|
5633 // Is alive closure |
4dfb2df418f2
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diff
changeset
|
5634 G1AlwaysAliveClosure always_alive(_g1h); |
4dfb2df418f2
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parents:
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diff
changeset
|
5635 |
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parents:
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diff
changeset
|
5636 // Copying keep alive closure. Applied to referent objects that need |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5637 // to be copied. |
20270
b7d24d2bc8be
8047323: Remove unused _copy_metadata_obj_cl in G1CopyingKeepAliveClosure
stefank
parents:
20257
diff
changeset
|
5638 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, &pss); |
3979
4dfb2df418f2
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parents:
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diff
changeset
|
5639 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5640 ReferenceProcessor* rp = _g1h->ref_processor_cm(); |
4dfb2df418f2
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diff
changeset
|
5641 |
4728
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jmasa
parents:
4711
diff
changeset
|
5642 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:
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diff
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|
5643 uint stride = MIN2(MAX2(_n_workers, 1U), limit); |
3979
4dfb2df418f2
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diff
changeset
|
5644 |
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diff
changeset
|
5645 // limit is set using max_num_q() - which was set using ParallelGCThreads. |
4dfb2df418f2
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diff
changeset
|
5646 // So this must be true - but assert just in case someone decides to |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5647 // change the worker ids. |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5648 assert(0 <= worker_id && worker_id < limit, "sanity"); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5649 assert(!rp->discovery_is_atomic(), "check this code"); |
4dfb2df418f2
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parents:
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diff
changeset
|
5650 |
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6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5651 // 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
|
5652 for (uint idx = worker_id; idx < limit; idx += stride) { |
4014
bf2d2b8b1726
7095243: Disambiguate ReferenceProcessor::_discoveredSoftRefs
johnc
parents:
4013
diff
changeset
|
5653 DiscoveredList& ref_list = rp->discovered_refs()[idx]; |
3979
4dfb2df418f2
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parents:
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diff
changeset
|
5654 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5655 DiscoveredListIterator iter(ref_list, &keep_alive, &always_alive); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5656 while (iter.has_next()) { |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5657 // Since discovery is not atomic for the CM ref processor, we |
4dfb2df418f2
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parents:
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diff
changeset
|
5658 // can see some null referent objects. |
4dfb2df418f2
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diff
changeset
|
5659 iter.load_ptrs(DEBUG_ONLY(true)); |
4dfb2df418f2
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parents:
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diff
changeset
|
5660 oop ref = iter.obj(); |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5661 |
4dfb2df418f2
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parents:
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diff
changeset
|
5662 // This will filter nulls. |
4dfb2df418f2
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diff
changeset
|
5663 if (iter.is_referent_alive()) { |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5664 iter.make_referent_alive(); |
4dfb2df418f2
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parents:
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diff
changeset
|
5665 } |
4dfb2df418f2
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parents:
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diff
changeset
|
5666 iter.move_to_next(); |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5667 } |
4dfb2df418f2
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parents:
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diff
changeset
|
5668 } |
4dfb2df418f2
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parents:
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diff
changeset
|
5669 |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5670 // Drain the queue - which may cause stealing |
4dfb2df418f2
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parents:
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diff
changeset
|
5671 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _queues, &_terminator); |
4dfb2df418f2
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diff
changeset
|
5672 drain_queue.do_void(); |
4dfb2df418f2
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3973
diff
changeset
|
5673 // Allocation buffers were retired at the end of G1ParEvacuateFollowersClosure |
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
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diff
changeset
|
5674 assert(pss.queue_is_empty(), "should be"); |
3979
4dfb2df418f2
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3973
diff
changeset
|
5675 } |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5676 }; |
4dfb2df418f2
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parents:
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diff
changeset
|
5677 |
4dfb2df418f2
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3973
diff
changeset
|
5678 // Weak Reference processing during an evacuation pause (part 1). |
6819 | 5679 void G1CollectedHeap::process_discovered_references(uint no_of_gc_workers) { |
3979
4dfb2df418f2
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parents:
3973
diff
changeset
|
5680 double ref_proc_start = os::elapsedTime(); |
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parents:
3973
diff
changeset
|
5681 |
4dfb2df418f2
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3973
diff
changeset
|
5682 ReferenceProcessor* rp = _ref_processor_stw; |
4dfb2df418f2
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diff
changeset
|
5683 assert(rp->discovery_enabled(), "should have been enabled"); |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5684 |
4dfb2df418f2
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diff
changeset
|
5685 // Any reference objects, in the collection set, that were 'discovered' |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5686 // by the CM ref processor should have already been copied (either by |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5687 // applying the external root copy closure to the discovered lists, or |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5688 // by following an RSet entry). |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5689 // |
4dfb2df418f2
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parents:
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diff
changeset
|
5690 // But some of the referents, that are in the collection set, that these |
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diff
changeset
|
5691 // reference objects point to may not have been copied: the STW ref |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5692 // processor would have seen that the reference object had already |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5693 // been 'discovered' and would have skipped discovering the reference, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5694 // but would not have treated the reference object as a regular oop. |
10405 | 5695 // As a result the copy closure would not have been applied to the |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5696 // referent object. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5697 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5698 // We need to explicitly copy these referent objects - the references |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5699 // will be processed at the end of remarking. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5700 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5701 // We also need to do this copying before we process the reference |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5702 // objects discovered by the STW ref processor in case one of these |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5703 // referents points to another object which is also referenced by an |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5704 // object discovered by the STW ref processor. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5705 |
4711 | 5706 assert(!G1CollectedHeap::use_parallel_gc_threads() || |
6819 | 5707 no_of_gc_workers == workers()->active_workers(), |
5708 "Need to reset active GC workers"); | |
5709 | |
5710 set_par_threads(no_of_gc_workers); | |
5711 G1ParPreserveCMReferentsTask keep_cm_referents(this, | |
5712 no_of_gc_workers, | |
5713 _task_queues); | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5714 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5715 if (G1CollectedHeap::use_parallel_gc_threads()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5716 workers()->run_task(&keep_cm_referents); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5717 } else { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5718 keep_cm_referents.work(0); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5719 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5720 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5721 set_par_threads(0); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5722 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5723 // Closure to test whether a referent is alive. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5724 G1STWIsAliveClosure is_alive(this); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5725 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5726 // Even when parallel reference processing is enabled, the processing |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5727 // 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
|
5728 // 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
|
5729 // JNI refs. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5730 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5731 // Use only a single queue for this PSS. |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5732 G1ParScanThreadState pss(this, 0, NULL); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5733 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5734 // We do not embed a reference processor in the copying/scanning |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5735 // closures while we're actually processing the discovered |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5736 // reference objects. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5737 G1ParScanHeapEvacFailureClosure evac_failure_cl(this, &pss, NULL); |
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
5738 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5739 pss.set_evac_failure_closure(&evac_failure_cl); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5740 |
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
5741 assert(pss.queue_is_empty(), "pre-condition"); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5742 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5743 G1ParScanExtRootClosure only_copy_non_heap_cl(this, &pss, NULL); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5744 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5745 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(this, &pss, NULL); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5746 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5747 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5748 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5749 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5750 // We also need to mark copied objects. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5751 copy_non_heap_cl = ©_mark_non_heap_cl; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5752 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5753 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5754 // Keep alive closure. |
20270
b7d24d2bc8be
8047323: Remove unused _copy_metadata_obj_cl in G1CopyingKeepAliveClosure
stefank
parents:
20257
diff
changeset
|
5755 G1CopyingKeepAliveClosure keep_alive(this, copy_non_heap_cl, &pss); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5756 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5757 // Serial Complete GC closure |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5758 G1STWDrainQueueClosure drain_queue(this, &pss); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5759 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5760 // Setup the soft refs policy... |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5761 rp->setup_policy(false); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5762 |
10405 | 5763 ReferenceProcessorStats stats; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5764 if (!rp->processing_is_mt()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5765 // Serial reference processing... |
10405 | 5766 stats = rp->process_discovered_references(&is_alive, |
5767 &keep_alive, | |
5768 &drain_queue, | |
5769 NULL, | |
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5770 _gc_timer_stw, |
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5771 _gc_tracer_stw->gc_id()); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5772 } else { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5773 // Parallel reference processing |
6819 | 5774 assert(rp->num_q() == no_of_gc_workers, "sanity"); |
5775 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
5776 | |
5777 G1STWRefProcTaskExecutor par_task_executor(this, workers(), _task_queues, no_of_gc_workers); | |
10405 | 5778 stats = rp->process_discovered_references(&is_alive, |
5779 &keep_alive, | |
5780 &drain_queue, | |
5781 &par_task_executor, | |
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5782 _gc_timer_stw, |
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5783 _gc_tracer_stw->gc_id()); |
10405 | 5784 } |
5785 | |
5786 _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
|
5787 |
983092f35ff7
8028710: G1 does not retire allocation buffers after reference processing work
tschatzl
parents:
20212
diff
changeset
|
5788 // We have completed copying any necessary live referent objects. |
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
5789 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
|
5790 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5791 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
|
5792 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
|
5793 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5794 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5795 // Weak Reference processing during an evacuation pause (part 2). |
6819 | 5796 void G1CollectedHeap::enqueue_discovered_references(uint no_of_gc_workers) { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5797 double ref_enq_start = os::elapsedTime(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5798 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5799 ReferenceProcessor* rp = _ref_processor_stw; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5800 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
|
5801 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5802 // Now enqueue any remaining on the discovered lists on to |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5803 // the pending list. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5804 if (!rp->processing_is_mt()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5805 // Serial reference processing... |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5806 rp->enqueue_discovered_references(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5807 } else { |
10405 | 5808 // Parallel reference enqueueing |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5809 |
6819 | 5810 assert(no_of_gc_workers == workers()->active_workers(), |
5811 "Need to reset active workers"); | |
5812 assert(rp->num_q() == no_of_gc_workers, "sanity"); | |
5813 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
5814 | |
5815 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
|
5816 rp->enqueue_discovered_references(&par_task_executor); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5817 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5818 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5819 rp->verify_no_references_recorded(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5820 assert(!rp->discovery_enabled(), "should have been disabled"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5821 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5822 // FIXME |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5823 // 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
|
5824 // Should we do that here also? We could, but it is a serial operation |
10405 | 5825 // and could significantly increase the pause time. |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5826 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5827 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
|
5828 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
|
5829 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5830 |
10405 | 5831 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
|
5832 _expand_heap_after_alloc_failure = true; |
10405 | 5833 _evacuation_failed = false; |
342 | 5834 |
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5835 // 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
|
5836 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
|
5837 |
342 | 5838 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
|
5839 |
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5840 // Disable the hot card cache. |
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5841 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
|
5842 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
|
5843 hot_card_cache->set_use_cache(false); |
889 | 5844 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5845 uint n_workers; |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5846 if (G1CollectedHeap::use_parallel_gc_threads()) { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5847 n_workers = |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5848 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5849 workers()->active_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5850 Threads::number_of_non_daemon_threads()); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5851 assert(UseDynamicNumberOfGCThreads || |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5852 n_workers == workers()->total_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5853 "If not dynamic should be using all the workers"); |
4711 | 5854 workers()->set_active_workers(n_workers); |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5855 set_par_threads(n_workers); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5856 } else { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5857 assert(n_par_threads() == 0, |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5858 "Should be the original non-parallel value"); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5859 n_workers = 1; |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5860 } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5861 |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5862 G1ParTask g1_par_task(this, _task_queues); |
342 | 5863 |
5864 init_for_evac_failure(NULL); | |
5865 | |
5866 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
|
5867 |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5868 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
|
5869 double start_par_time_sec = os::elapsedTime(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5870 double end_par_time_sec; |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5871 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5872 { |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5873 StrongRootsScope srs(this); |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5874 // InitialMark needs claim bits to keep track of the marked-through CLDs. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5875 if (g1_policy()->during_initial_mark_pause()) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5876 ClassLoaderDataGraph::clear_claimed_marks(); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5877 } |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5878 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5879 if (G1CollectedHeap::use_parallel_gc_threads()) { |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5880 // 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
|
5881 if (ParallelGCVerbose) G1ParScanThreadState::print_termination_stats_hdr(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5882 // These tasks use ShareHeap::_process_strong_tasks |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5883 assert(UseDynamicNumberOfGCThreads || |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5884 workers()->active_workers() == workers()->total_workers(), |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5885 "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
|
5886 workers()->run_task(&g1_par_task); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5887 } else { |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5888 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
|
5889 g1_par_task.work(0); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5890 } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5891 end_par_time_sec = os::elapsedTime(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5892 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5893 // 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
|
5894 // 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
|
5895 // 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
|
5896 // 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
|
5897 // reported parallel time. |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5898 } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5899 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5900 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
|
5901 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
|
5902 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5903 double code_root_fixup_time_ms = |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5904 (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
|
5905 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
|
5906 |
342 | 5907 set_par_threads(0); |
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5908 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5909 // Process any discovered reference objects - we have |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5910 // to do this _before_ we retire the GC alloc regions |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5911 // as we may have to copy some 'reachable' referent |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5912 // objects (and their reachable sub-graphs) that were |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5913 // not copied during the pause. |
6819 | 5914 process_discovered_references(n_workers); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5915 |
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5916 // Weak root processing. |
342 | 5917 { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5918 G1STWIsAliveClosure is_alive(this); |
342 | 5919 G1KeepAliveClosure keep_alive(this); |
5920 JNIHandles::weak_oops_do(&is_alive, &keep_alive); | |
17764 | 5921 if (G1StringDedup::is_enabled()) { |
5922 G1StringDedup::unlink_or_oops_do(&is_alive, &keep_alive); | |
5923 } | |
342 | 5924 } |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5925 |
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
5926 _allocator->release_gc_alloc_regions(n_workers, evacuation_info); |
342 | 5927 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
|
5928 |
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5929 // 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
|
5930 // 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
|
5931 // 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
|
5932 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
|
5933 hot_card_cache->set_use_cache(true); |
342 | 5934 |
17753
191174b49bec
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
17749
diff
changeset
|
5935 purge_code_root_memory(); |
191174b49bec
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
17749
diff
changeset
|
5936 |
12080 | 5937 if (g1_policy()->during_initial_mark_pause()) { |
5938 // Reset the claim values set during marking the strong code roots | |
5939 reset_heap_region_claim_values(); | |
5940 } | |
5941 | |
342 | 5942 finalize_for_evac_failure(); |
5943 | |
5944 if (evacuation_failed()) { | |
5945 remove_self_forwarding_pointers(); | |
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5946 |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5947 // Reset the G1EvacuationFailureALot counters and flags |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5948 // 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
|
5949 // evacuation failure occurs. |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5950 NOT_PRODUCT(reset_evacuation_should_fail();) |
342 | 5951 } |
5952 | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5953 // Enqueue any remaining references remaining on the STW |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5954 // reference processor's discovered lists. We need to do |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5955 // this after the card table is cleaned (and verified) as |
10405 | 5956 // the act of enqueueing entries on to the pending list |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5957 // will log these updates (and dirty their associated |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5958 // cards). We need these updates logged to update any |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5959 // RSets. |
6819 | 5960 enqueue_discovered_references(n_workers); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5961 |
20504
6948da6d7c13
8052172: Evacuation failure handling in G1 does not evacuate all objects if -XX:-G1DeferredRSUpdate is set
tschatzl
parents:
20503
diff
changeset
|
5962 redirty_logged_cards(); |
342 | 5963 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
5964 } | |
5965 | |
2152 | 5966 void G1CollectedHeap::free_region(HeapRegion* hr, |
5967 FreeRegionList* free_list, | |
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
5968 bool par, |
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
5969 bool locked) { |
20481
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
5970 assert(!hr->is_free(), "the region should not be free"); |
2152 | 5971 assert(!hr->is_empty(), "the region should not be empty"); |
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
5972 assert(_hrm.is_available(hr->hrm_index()), "region should be committed"); |
2152 | 5973 assert(free_list != NULL, "pre-condition"); |
5974 | |
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
5975 if (G1VerifyBitmaps) { |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
5976 MemRegion mr(hr->bottom(), hr->end()); |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
5977 concurrent_mark()->clearRangePrevBitmap(mr); |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
5978 } |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
5979 |
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5980 // 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
|
5981 // 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
|
5982 // (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
|
5983 if (!hr->is_young()) { |
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5984 _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
|
5985 } |
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
5986 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
|
5987 free_list->add_ordered(hr); |
2152 | 5988 } |
5989 | |
5990 void G1CollectedHeap::free_humongous_region(HeapRegion* hr, | |
5991 FreeRegionList* free_list, | |
5992 bool par) { | |
5993 assert(hr->startsHumongous(), "this is only for starts humongous regions"); | |
5994 assert(free_list != NULL, "pre-condition"); | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5995 |
2152 | 5996 size_t hr_capacity = hr->capacity(); |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5997 // 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
|
5998 // otherwise the information will be gone. |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5999 uint last_index = hr->last_hc_index(); |
20481
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
6000 hr->clear_humongous(); |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6001 free_region(hr, free_list, par); |
2152 | 6002 |
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6003 uint i = hr->hrm_index() + 1; |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
6004 while (i < last_index) { |
3766 | 6005 HeapRegion* curr_hr = region_at(i); |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
6006 assert(curr_hr->continuesHumongous(), "invariant"); |
20481
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
6007 curr_hr->clear_humongous(); |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6008 free_region(curr_hr, free_list, par); |
2152 | 6009 i += 1; |
6010 } | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6011 } |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6012 |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6013 void G1CollectedHeap::remove_from_old_sets(const HeapRegionSetCount& old_regions_removed, |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6014 const HeapRegionSetCount& humongous_regions_removed) { |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6015 if (old_regions_removed.length() > 0 || humongous_regions_removed.length() > 0) { |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6016 MutexLockerEx x(OldSets_lock, Mutex::_no_safepoint_check_flag); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6017 _old_set.bulk_remove(old_regions_removed); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6018 _humongous_set.bulk_remove(humongous_regions_removed); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6019 } |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6020 |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6021 } |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6022 |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6023 void G1CollectedHeap::prepend_to_freelist(FreeRegionList* list) { |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6024 assert(list != NULL, "list can't be null"); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6025 if (!list->is_empty()) { |
2152 | 6026 MutexLockerEx x(FreeList_lock, Mutex::_no_safepoint_check_flag); |
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6027 _hrm.insert_list_into_free_list(list); |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6028 } |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6029 } |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6030 |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6031 void G1CollectedHeap::decrement_summary_bytes(size_t bytes) { |
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
6032 _allocator->decrease_used(bytes); |
342 | 6033 } |
6034 | |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6035 class G1ParCleanupCTTask : public AbstractGangTask { |
12343 | 6036 G1SATBCardTableModRefBS* _ct_bs; |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6037 G1CollectedHeap* _g1h; |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6038 HeapRegion* volatile _su_head; |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6039 public: |
12343 | 6040 G1ParCleanupCTTask(G1SATBCardTableModRefBS* ct_bs, |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6041 G1CollectedHeap* g1h) : |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6042 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
|
6043 _ct_bs(ct_bs), _g1h(g1h) { } |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6044 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
6045 void work(uint worker_id) { |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6046 HeapRegion* r; |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6047 while (r = _g1h->pop_dirty_cards_region()) { |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6048 clear_cards(r); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6049 } |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6050 } |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6051 |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6052 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
|
6053 // 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
|
6054 if (!r->is_survivor()) { |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6055 _ct_bs->clear(MemRegion(r->bottom(), r->end())); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6056 } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6057 } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6058 }; |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6059 |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6060 #ifndef PRODUCT |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6061 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
|
6062 G1CollectedHeap* _g1h; |
12343 | 6063 G1SATBCardTableModRefBS* _ct_bs; |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6064 public: |
12343 | 6065 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
|
6066 : _g1h(g1h), _ct_bs(ct_bs) { } |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6067 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
|
6068 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
|
6069 _g1h->verify_dirty_region(r); |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6070 } else { |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6071 _g1h->verify_not_dirty_region(r); |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6072 } |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6073 return false; |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6074 } |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6075 }; |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6076 |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6077 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
|
6078 // All of the region should be clean. |
12343 | 6079 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
|
6080 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
|
6081 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
|
6082 } |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6083 |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6084 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
|
6085 // 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
|
6086 // 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
|
6087 // 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
|
6088 // 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
|
6089 // 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
|
6090 // 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
|
6091 // is dirty. |
12343 | 6092 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
|
6093 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
|
6094 if (hr->is_young()) { |
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6095 ct_bs->verify_g1_young_region(mr); |
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6096 } else { |
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6097 ct_bs->verify_dirty_region(mr); |
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6098 } |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6099 } |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6100 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6101 void G1CollectedHeap::verify_dirty_young_list(HeapRegion* head) { |
12343 | 6102 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6103 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
|
6104 verify_dirty_region(hr); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6105 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6106 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6107 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6108 void G1CollectedHeap::verify_dirty_young_regions() { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6109 verify_dirty_young_list(_young_list->first_region()); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6110 } |
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6111 |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6112 bool G1CollectedHeap::verify_no_bits_over_tams(const char* bitmap_name, CMBitMapRO* bitmap, |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6113 HeapWord* tams, HeapWord* end) { |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6114 guarantee(tams <= end, |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6115 err_msg("tams: "PTR_FORMAT" end: "PTR_FORMAT, tams, end)); |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6116 HeapWord* result = bitmap->getNextMarkedWordAddress(tams, end); |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6117 if (result < end) { |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6118 gclog_or_tty->cr(); |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6119 gclog_or_tty->print_cr("## wrong marked address on %s bitmap: "PTR_FORMAT, |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6120 bitmap_name, result); |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6121 gclog_or_tty->print_cr("## %s tams: "PTR_FORMAT" end: "PTR_FORMAT, |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6122 bitmap_name, tams, end); |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6123 return false; |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6124 } |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6125 return true; |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6126 } |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6127 |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6128 bool G1CollectedHeap::verify_bitmaps(const char* caller, HeapRegion* hr) { |
e0954897238a
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6129 CMBitMapRO* prev_bitmap = concurrent_mark()->prevMarkBitMap(); |
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6130 CMBitMapRO* next_bitmap = (CMBitMapRO*) concurrent_mark()->nextMarkBitMap(); |
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6131 |
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6132 HeapWord* bottom = hr->bottom(); |
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6133 HeapWord* ptams = hr->prev_top_at_mark_start(); |
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6134 HeapWord* ntams = hr->next_top_at_mark_start(); |
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6135 HeapWord* end = hr->end(); |
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6136 |
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6137 bool res_p = verify_no_bits_over_tams("prev", prev_bitmap, ptams, end); |
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6138 |
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6139 bool res_n = true; |
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6140 // We reset mark_in_progress() before we reset _cmThread->in_progress() and in this window |
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6141 // we do the clearing of the next bitmap concurrently. Thus, we can not verify the bitmap |
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6142 // if we happen to be in that state. |
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6143 if (mark_in_progress() || !_cmThread->in_progress()) { |
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6144 res_n = verify_no_bits_over_tams("next", next_bitmap, ntams, end); |
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6145 } |
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6146 if (!res_p || !res_n) { |
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6147 gclog_or_tty->print_cr("#### Bitmap verification failed for "HR_FORMAT, |
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6148 HR_FORMAT_PARAMS(hr)); |
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6149 gclog_or_tty->print_cr("#### Caller: %s", caller); |
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6150 return false; |
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|
6151 } |
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6152 return true; |
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|
6153 } |
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6154 |
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6155 void G1CollectedHeap::check_bitmaps(const char* caller, HeapRegion* hr) { |
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6156 if (!G1VerifyBitmaps) return; |
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6157 |
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6158 guarantee(verify_bitmaps(caller, hr), "bitmap verification"); |
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6159 } |
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6160 |
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6161 class G1VerifyBitmapClosure : public HeapRegionClosure { |
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6162 private: |
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6163 const char* _caller; |
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6164 G1CollectedHeap* _g1h; |
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6165 bool _failures; |
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6166 |
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|
6167 public: |
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6168 G1VerifyBitmapClosure(const char* caller, G1CollectedHeap* g1h) : |
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6169 _caller(caller), _g1h(g1h), _failures(false) { } |
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6170 |
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6171 bool failures() { return _failures; } |
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6172 |
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6173 virtual bool doHeapRegion(HeapRegion* hr) { |
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6174 if (hr->continuesHumongous()) return false; |
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6175 |
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6176 bool result = _g1h->verify_bitmaps(_caller, hr); |
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6177 if (!result) { |
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6178 _failures = true; |
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|
6179 } |
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|
6180 return false; |
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|
6181 } |
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|
6182 }; |
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|
6183 |
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|
6184 void G1CollectedHeap::check_bitmaps(const char* caller) { |
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|
6185 if (!G1VerifyBitmaps) return; |
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|
6186 |
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|
6187 G1VerifyBitmapClosure cl(caller, this); |
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|
6188 heap_region_iterate(&cl); |
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|
6189 guarantee(!cl.failures(), "bitmap verification"); |
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|
6190 } |
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|
6191 #endif // PRODUCT |
940
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6192 |
342 | 6193 void G1CollectedHeap::cleanUpCardTable() { |
12343 | 6194 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
342 | 6195 double start = os::elapsedTime(); |
6196 | |
4023 | 6197 { |
6198 // Iterate over the dirty cards region list. | |
6199 G1ParCleanupCTTask cleanup_task(ct_bs, this); | |
6200 | |
4711 | 6201 if (G1CollectedHeap::use_parallel_gc_threads()) { |
6202 set_par_threads(); | |
4023 | 6203 workers()->run_task(&cleanup_task); |
6204 set_par_threads(0); | |
6205 } else { | |
6206 while (_dirty_cards_region_list) { | |
6207 HeapRegion* r = _dirty_cards_region_list; | |
6208 cleanup_task.clear_cards(r); | |
6209 _dirty_cards_region_list = r->get_next_dirty_cards_region(); | |
6210 if (_dirty_cards_region_list == r) { | |
6211 // The last region. | |
6212 _dirty_cards_region_list = NULL; | |
6213 } | |
6214 r->set_next_dirty_cards_region(NULL); | |
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|
6215 } |
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|
6216 } |
4023 | 6217 #ifndef PRODUCT |
6218 if (G1VerifyCTCleanup || VerifyAfterGC) { | |
6219 G1VerifyCardTableCleanup cleanup_verifier(this, ct_bs); | |
6220 heap_region_iterate(&cleanup_verifier); | |
6221 } | |
6222 #endif | |
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|
6223 } |
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|
6224 |
342 | 6225 double elapsed = os::elapsedTime() - start; |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
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|
6226 g1_policy()->phase_times()->record_clear_ct_time(elapsed * 1000.0); |
342 | 6227 } |
6228 | |
10405 | 6229 void G1CollectedHeap::free_collection_set(HeapRegion* cs_head, EvacuationInfo& evacuation_info) { |
2152 | 6230 size_t pre_used = 0; |
6231 FreeRegionList local_free_list("Local List for CSet Freeing"); | |
6232 | |
342 | 6233 double young_time_ms = 0.0; |
6234 double non_young_time_ms = 0.0; | |
6235 | |
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|
6236 // Since the collection set is a superset of the the young list, |
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6237 // all we need to do to clear the young list is clear its |
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6238 // head and length, and unlink any young regions in the code below |
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|
6239 _young_list->clear(); |
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|
6240 |
342 | 6241 G1CollectorPolicy* policy = g1_policy(); |
6242 | |
6243 double start_sec = os::elapsedTime(); | |
6244 bool non_young = true; | |
6245 | |
6246 HeapRegion* cur = cs_head; | |
6247 int age_bound = -1; | |
6248 size_t rs_lengths = 0; | |
6249 | |
6250 while (cur != NULL) { | |
2361 | 6251 assert(!is_on_master_free_list(cur), "sanity"); |
342 | 6252 if (non_young) { |
6253 if (cur->is_young()) { | |
6254 double end_sec = os::elapsedTime(); | |
6255 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
6256 non_young_time_ms += elapsed_ms; | |
6257 | |
6258 start_sec = os::elapsedTime(); | |
6259 non_young = false; | |
6260 } | |
6261 } else { | |
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6262 if (!cur->is_young()) { |
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|
6263 double end_sec = os::elapsedTime(); |
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|
6264 double elapsed_ms = (end_sec - start_sec) * 1000.0; |
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|
6265 young_time_ms += elapsed_ms; |
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|
6266 |
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|
6267 start_sec = os::elapsedTime(); |
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diff
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|
6268 non_young = true; |
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|
6269 } |
342 | 6270 } |
6271 | |
17755
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|
6272 rs_lengths += cur->rem_set()->occupied_locked(); |
342 | 6273 |
6274 HeapRegion* next = cur->next_in_collection_set(); | |
6275 assert(cur->in_collection_set(), "bad CS"); | |
6276 cur->set_next_in_collection_set(NULL); | |
6277 cur->set_in_collection_set(false); | |
6278 | |
6279 if (cur->is_young()) { | |
6280 int index = cur->young_index_in_cset(); | |
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|
6281 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
|
6282 assert((uint) index < policy->young_cset_region_length(), "invariant"); |
342 | 6283 size_t words_survived = _surviving_young_words[index]; |
6284 cur->record_surv_words_in_group(words_survived); | |
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|
6285 |
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|
6286 // At this point the we have 'popped' cur from the collection set |
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6287 // (linked via next_in_collection_set()) but it is still in the |
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|
6288 // young list (linked via next_young_region()). Clear the |
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|
6289 // _next_young_region field. |
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|
6290 cur->set_next_young_region(NULL); |
342 | 6291 } else { |
6292 int index = cur->young_index_in_cset(); | |
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|
6293 assert(index == -1, "invariant"); |
342 | 6294 } |
6295 | |
6296 assert( (cur->is_young() && cur->young_index_in_cset() > -1) || | |
6297 (!cur->is_young() && cur->young_index_in_cset() == -1), | |
6298 "invariant" ); | |
6299 | |
6300 if (!cur->evacuation_failed()) { | |
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|
6301 MemRegion used_mr = cur->used_region(); |
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|
6302 |
342 | 6303 // And the region is empty. |
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changeset
|
6304 assert(!used_mr.is_empty(), "Should not have empty regions in a CS."); |
17736
58fc1b1523dc
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brutisso
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17727
diff
changeset
|
6305 pre_used += cur->used(); |
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|
6306 free_region(cur, &local_free_list, false /* par */, true /* locked */); |
342 | 6307 } else { |
6308 cur->uninstall_surv_rate_group(); | |
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changeset
|
6309 if (cur->is_young()) { |
342 | 6310 cur->set_young_index_in_cset(-1); |
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parents:
4073
diff
changeset
|
6311 } |
342 | 6312 cur->set_evacuation_failed(false); |
4072 | 6313 // The region is now considered to be old. |
20481
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
6314 cur->set_old(); |
4072 | 6315 _old_set.add(cur); |
10405 | 6316 evacuation_info.increment_collectionset_used_after(cur->used()); |
342 | 6317 } |
6318 cur = next; | |
6319 } | |
6320 | |
10405 | 6321 evacuation_info.set_regions_freed(local_free_list.length()); |
342 | 6322 policy->record_max_rs_lengths(rs_lengths); |
6323 policy->cset_regions_freed(); | |
6324 | |
6325 double end_sec = os::elapsedTime(); | |
6326 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6327 |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6328 if (non_young) { |
342 | 6329 non_young_time_ms += elapsed_ms; |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6330 } else { |
342 | 6331 young_time_ms += elapsed_ms; |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6332 } |
342 | 6333 |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6334 prepend_to_freelist(&local_free_list); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6335 decrement_summary_bytes(pre_used); |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
6336 policy->phase_times()->record_young_free_cset_time_ms(young_time_ms); |
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
6337 policy->phase_times()->record_non_young_free_cset_time_ms(non_young_time_ms); |
342 | 6338 } |
6339 | |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6340 class G1FreeHumongousRegionClosure : public HeapRegionClosure { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6341 private: |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6342 FreeRegionList* _free_region_list; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6343 HeapRegionSet* _proxy_set; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6344 HeapRegionSetCount _humongous_regions_removed; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6345 size_t _freed_bytes; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6346 public: |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6347 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6348 G1FreeHumongousRegionClosure(FreeRegionList* free_region_list) : |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6349 _free_region_list(free_region_list), _humongous_regions_removed(), _freed_bytes(0) { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6350 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6351 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6352 virtual bool doHeapRegion(HeapRegion* r) { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6353 if (!r->startsHumongous()) { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6354 return false; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6355 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6356 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6357 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6358 |
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6359 oop obj = (oop)r->bottom(); |
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6360 CMBitMap* next_bitmap = g1h->concurrent_mark()->nextMarkBitMap(); |
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6361 |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6362 // The following checks whether the humongous object is live are sufficient. |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6363 // The main additional check (in addition to having a reference from the roots |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6364 // or the young gen) is whether the humongous object has a remembered set entry. |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6365 // |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6366 // A humongous object cannot be live if there is no remembered set for it |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6367 // because: |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6368 // - there can be no references from within humongous starts regions referencing |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6369 // the object because we never allocate other objects into them. |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6370 // (I.e. there are no intra-region references that may be missed by the |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6371 // remembered set) |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6372 // - as soon there is a remembered set entry to the humongous starts region |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6373 // (i.e. it has "escaped" to an old object) this remembered set entry will stay |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6374 // until the end of a concurrent mark. |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6375 // |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6376 // It is not required to check whether the object has been found dead by marking |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6377 // or not, in fact it would prevent reclamation within a concurrent cycle, as |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6378 // all objects allocated during that time are considered live. |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6379 // SATB marking is even more conservative than the remembered set. |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6380 // So if at this point in the collection there is no remembered set entry, |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6381 // nobody has a reference to it. |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6382 // At the start of collection we flush all refinement logs, and remembered sets |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6383 // are completely up-to-date wrt to references to the humongous object. |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6384 // |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6385 // Other implementation considerations: |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6386 // - never consider object arrays: while they are a valid target, they have not |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6387 // been observed to be used as temporary objects. |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6388 // - they would also pose considerable effort for cleaning up the the remembered |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6389 // sets. |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6390 // While this cleanup is not strictly necessary to be done (or done instantly), |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6391 // given that their occurrence is very low, this saves us this additional |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6392 // complexity. |
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6393 uint region_idx = r->hrm_index(); |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6394 if (g1h->humongous_is_live(region_idx) || |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6395 g1h->humongous_region_is_always_live(region_idx)) { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6396 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6397 if (G1TraceReclaimDeadHumongousObjectsAtYoungGC) { |
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6398 gclog_or_tty->print_cr("Live humongous %d region %d with remset "SIZE_FORMAT" code roots "SIZE_FORMAT" is marked %d live-other %d obj array %d", |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6399 r->isHumongous(), |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6400 region_idx, |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6401 r->rem_set()->occupied(), |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6402 r->rem_set()->strong_code_roots_list_length(), |
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6403 next_bitmap->isMarked(r->bottom()), |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6404 g1h->humongous_is_live(region_idx), |
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6405 obj->is_objArray() |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6406 ); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6407 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6408 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6409 return false; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6410 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6411 |
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6412 guarantee(!obj->is_objArray(), |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6413 err_msg("Eagerly reclaiming object arrays is not supported, but the object "PTR_FORMAT" is.", |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6414 r->bottom())); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6415 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6416 if (G1TraceReclaimDeadHumongousObjectsAtYoungGC) { |
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6417 gclog_or_tty->print_cr("Reclaim humongous region %d start "PTR_FORMAT" region %d length "UINT32_FORMAT" with remset "SIZE_FORMAT" code roots "SIZE_FORMAT" is marked %d live-other %d obj array %d", |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6418 r->isHumongous(), |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6419 r->bottom(), |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6420 region_idx, |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6421 r->region_num(), |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6422 r->rem_set()->occupied(), |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6423 r->rem_set()->strong_code_roots_list_length(), |
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6424 next_bitmap->isMarked(r->bottom()), |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6425 g1h->humongous_is_live(region_idx), |
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6426 obj->is_objArray() |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6427 ); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6428 } |
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6429 // Need to clear mark bit of the humongous object if already set. |
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6430 if (next_bitmap->isMarked(r->bottom())) { |
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6431 next_bitmap->clear(r->bottom()); |
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6432 } |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6433 _freed_bytes += r->used(); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6434 r->set_containing_set(NULL); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6435 _humongous_regions_removed.increment(1u, r->capacity()); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6436 g1h->free_humongous_region(r, _free_region_list, false); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6437 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6438 return false; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6439 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6440 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6441 HeapRegionSetCount& humongous_free_count() { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6442 return _humongous_regions_removed; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6443 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6444 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6445 size_t bytes_freed() const { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6446 return _freed_bytes; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6447 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6448 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6449 size_t humongous_reclaimed() const { |
755930f931e3
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6450 return _humongous_regions_removed.length(); |
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|
6451 } |
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|
6452 }; |
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|
6453 |
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|
6454 void G1CollectedHeap::eagerly_reclaim_humongous_regions() { |
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|
6455 assert_at_safepoint(true); |
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|
6456 |
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|
6457 if (!G1ReclaimDeadHumongousObjectsAtYoungGC || !_has_humongous_reclaim_candidates) { |
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|
6458 g1_policy()->phase_times()->record_fast_reclaim_humongous_time_ms(0.0, 0); |
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|
6459 return; |
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|
6460 } |
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|
6461 |
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|
6462 double start_time = os::elapsedTime(); |
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|
6463 |
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|
6464 FreeRegionList local_cleanup_list("Local Humongous Cleanup List"); |
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|
6465 |
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|
6466 G1FreeHumongousRegionClosure cl(&local_cleanup_list); |
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|
6467 heap_region_iterate(&cl); |
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|
6468 |
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|
6469 HeapRegionSetCount empty_set; |
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|
6470 remove_from_old_sets(empty_set, cl.humongous_free_count()); |
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6471 |
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|
6472 G1HRPrinter* hr_printer = _g1h->hr_printer(); |
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6473 if (hr_printer->is_active()) { |
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|
6474 FreeRegionListIterator iter(&local_cleanup_list); |
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|
6475 while (iter.more_available()) { |
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|
6476 HeapRegion* hr = iter.get_next(); |
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|
6477 hr_printer->cleanup(hr); |
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|
6478 } |
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|
6479 } |
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|
6480 |
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|
6481 prepend_to_freelist(&local_cleanup_list); |
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|
6482 decrement_summary_bytes(cl.bytes_freed()); |
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|
6483 |
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|
6484 g1_policy()->phase_times()->record_fast_reclaim_humongous_time_ms((os::elapsedTime() - start_time) * 1000.0, |
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|
6485 cl.humongous_reclaimed()); |
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|
6486 } |
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|
6487 |
1394
1316cec51b4d
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|
6488 // This routine is similar to the above but does not record |
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6489 // any policy statistics or update free lists; we are abandoning |
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|
6490 // the current incremental collection set in preparation of a |
1316cec51b4d
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|
6491 // full collection. After the full GC we will start to build up |
1316cec51b4d
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|
6492 // the incremental collection set again. |
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|
6493 // This is only called when we're doing a full collection |
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6494 // and is immediately followed by the tearing down of the young list. |
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|
6495 |
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|
6496 void G1CollectedHeap::abandon_collection_set(HeapRegion* cs_head) { |
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|
6497 HeapRegion* cur = cs_head; |
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|
6498 |
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|
6499 while (cur != NULL) { |
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|
6500 HeapRegion* next = cur->next_in_collection_set(); |
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|
6501 assert(cur->in_collection_set(), "bad CS"); |
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|
6502 cur->set_next_in_collection_set(NULL); |
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|
6503 cur->set_in_collection_set(false); |
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|
6504 cur->set_young_index_in_cset(-1); |
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|
6505 cur = next; |
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|
6506 } |
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|
6507 } |
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|
6508 |
2152 | 6509 void G1CollectedHeap::set_free_regions_coming() { |
6510 if (G1ConcRegionFreeingVerbose) { | |
6511 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
6512 "setting free regions coming"); | |
6513 } | |
6514 | |
6515 assert(!free_regions_coming(), "pre-condition"); | |
6516 _free_regions_coming = true; | |
342 | 6517 } |
6518 | |
2152 | 6519 void G1CollectedHeap::reset_free_regions_coming() { |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
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changeset
|
6520 assert(free_regions_coming(), "pre-condition"); |
eff609af17d7
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|
6521 |
2152 | 6522 { |
6523 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
6524 _free_regions_coming = false; | |
6525 SecondaryFreeList_lock->notify_all(); | |
6526 } | |
6527 | |
6528 if (G1ConcRegionFreeingVerbose) { | |
6529 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
6530 "reset free regions coming"); | |
342 | 6531 } |
6532 } | |
6533 | |
2152 | 6534 void G1CollectedHeap::wait_while_free_regions_coming() { |
6535 // Most of the time we won't have to wait, so let's do a quick test | |
6536 // first before we take the lock. | |
6537 if (!free_regions_coming()) { | |
6538 return; | |
6539 } | |
6540 | |
6541 if (G1ConcRegionFreeingVerbose) { | |
6542 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
6543 "waiting for free regions"); | |
342 | 6544 } |
6545 | |
6546 { | |
2152 | 6547 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
6548 while (free_regions_coming()) { | |
6549 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
342 | 6550 } |
2152 | 6551 } |
6552 | |
6553 if (G1ConcRegionFreeingVerbose) { | |
6554 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
6555 "done waiting for free regions"); | |
6556 } | |
342 | 6557 } |
6558 | |
6559 void G1CollectedHeap::set_region_short_lived_locked(HeapRegion* hr) { | |
6560 assert(heap_lock_held_for_gc(), | |
6561 "the heap lock should already be held by or for this thread"); | |
6562 _young_list->push_region(hr); | |
6563 } | |
6564 | |
6565 class NoYoungRegionsClosure: public HeapRegionClosure { | |
6566 private: | |
6567 bool _success; | |
6568 public: | |
6569 NoYoungRegionsClosure() : _success(true) { } | |
6570 bool doHeapRegion(HeapRegion* r) { | |
6571 if (r->is_young()) { | |
6572 gclog_or_tty->print_cr("Region ["PTR_FORMAT", "PTR_FORMAT") tagged as young", | |
6573 r->bottom(), r->end()); | |
6574 _success = false; | |
6575 } | |
6576 return false; | |
6577 } | |
6578 bool success() { return _success; } | |
6579 }; | |
6580 | |
1394
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|
6581 bool G1CollectedHeap::check_young_list_empty(bool check_heap, bool check_sample) { |
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|
6582 bool ret = _young_list->check_list_empty(check_sample); |
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|
6583 |
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diff
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|
6584 if (check_heap) { |
342 | 6585 NoYoungRegionsClosure closure; |
6586 heap_region_iterate(&closure); | |
6587 ret = ret && closure.success(); | |
6588 } | |
6589 | |
6590 return ret; | |
6591 } | |
6592 | |
4072 | 6593 class TearDownRegionSetsClosure : public HeapRegionClosure { |
6594 private: | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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diff
changeset
|
6595 HeapRegionSet *_old_set; |
2152 | 6596 |
342 | 6597 public: |
17736
58fc1b1523dc
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brutisso
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diff
changeset
|
6598 TearDownRegionSetsClosure(HeapRegionSet* old_set) : _old_set(old_set) { } |
2152 | 6599 |
342 | 6600 bool doHeapRegion(HeapRegion* r) { |
20481
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
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diff
changeset
|
6601 if (r->is_old()) { |
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8057768: Make heap region region type in G1 HeapRegion explicit
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diff
changeset
|
6602 _old_set->remove(r); |
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
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diff
changeset
|
6603 } else { |
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8057768: Make heap region region type in G1 HeapRegion explicit
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diff
changeset
|
6604 // We ignore free regions, we'll empty the free list afterwards. |
c02ec279b062
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diff
changeset
|
6605 // We ignore young regions, we'll empty the young list afterwards. |
4072 | 6606 // We ignore humongous regions, we're not tearing down the |
20481
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
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diff
changeset
|
6607 // humongous regions set. |
c02ec279b062
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changeset
|
6608 assert(r->is_free() || r->is_young() || r->isHumongous(), |
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|
6609 "it cannot be another type"); |
342 | 6610 } |
6611 return false; | |
6612 } | |
6613 | |
4072 | 6614 ~TearDownRegionSetsClosure() { |
6615 assert(_old_set->is_empty(), "post-condition"); | |
2152 | 6616 } |
342 | 6617 }; |
6618 | |
4072 | 6619 void G1CollectedHeap::tear_down_region_sets(bool free_list_only) { |
6620 assert_at_safepoint(true /* should_be_vm_thread */); | |
6621 | |
6622 if (!free_list_only) { | |
6623 TearDownRegionSetsClosure cl(&_old_set); | |
6624 heap_region_iterate(&cl); | |
6625 | |
17764 | 6626 // Note that emptying the _young_list is postponed and instead done as |
6627 // the first step when rebuilding the regions sets again. The reason for | |
6628 // this is that during a full GC string deduplication needs to know if | |
6629 // a collected region was young or old when the full GC was initiated. | |
4072 | 6630 } |
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changeset
|
6631 _hrm.remove_all_free_regions(); |
4072 | 6632 } |
6633 | |
6634 class RebuildRegionSetsClosure : public HeapRegionClosure { | |
6635 private: | |
6636 bool _free_list_only; | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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17727
diff
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|
6637 HeapRegionSet* _old_set; |
20377
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tschatzl
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diff
changeset
|
6638 HeapRegionManager* _hrm; |
4072 | 6639 size_t _total_used; |
6640 | |
6641 public: | |
6642 RebuildRegionSetsClosure(bool free_list_only, | |
20377
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tschatzl
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20359
diff
changeset
|
6643 HeapRegionSet* old_set, HeapRegionManager* hrm) : |
4072 | 6644 _free_list_only(free_list_only), |
20377
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8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
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20359
diff
changeset
|
6645 _old_set(old_set), _hrm(hrm), _total_used(0) { |
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
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20359
diff
changeset
|
6646 assert(_hrm->num_free_regions() == 0, "pre-condition"); |
4072 | 6647 if (!free_list_only) { |
6648 assert(_old_set->is_empty(), "pre-condition"); | |
6649 } | |
6650 } | |
6651 | |
6652 bool doHeapRegion(HeapRegion* r) { | |
6653 if (r->continuesHumongous()) { | |
6654 return false; | |
6655 } | |
6656 | |
6657 if (r->is_empty()) { | |
6658 // Add free regions to the free list | |
20481
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
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diff
changeset
|
6659 r->set_free(); |
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
6660 r->set_allocation_context(AllocationContext::system()); |
20377
a8ea2f110d87
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tschatzl
parents:
20359
diff
changeset
|
6661 _hrm->insert_into_free_list(r); |
4072 | 6662 } else if (!_free_list_only) { |
6663 assert(!r->is_young(), "we should not come across young regions"); | |
6664 | |
6665 if (r->isHumongous()) { | |
6666 // We ignore humongous regions, we left the humongous set unchanged | |
6667 } else { | |
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c02ec279b062
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brutisso
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diff
changeset
|
6668 // Objects that were compacted would have ended up on regions |
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
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20445
diff
changeset
|
6669 // that were previously old or free. |
c02ec279b062
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brutisso
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20445
diff
changeset
|
6670 assert(r->is_free() || r->is_old(), "invariant"); |
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
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diff
changeset
|
6671 // We now consider them old, so register as such. |
c02ec279b062
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brutisso
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diff
changeset
|
6672 r->set_old(); |
4072 | 6673 _old_set->add(r); |
6674 } | |
6675 _total_used += r->used(); | |
6676 } | |
6677 | |
6678 return false; | |
6679 } | |
6680 | |
6681 size_t total_used() { | |
6682 return _total_used; | |
6683 } | |
6684 }; | |
6685 | |
6686 void G1CollectedHeap::rebuild_region_sets(bool free_list_only) { | |
6687 assert_at_safepoint(true /* should_be_vm_thread */); | |
6688 | |
17764 | 6689 if (!free_list_only) { |
6690 _young_list->empty_list(); | |
6691 } | |
6692 | |
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
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20359
diff
changeset
|
6693 RebuildRegionSetsClosure cl(free_list_only, &_old_set, &_hrm); |
4072 | 6694 heap_region_iterate(&cl); |
6695 | |
6696 if (!free_list_only) { | |
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
6697 _allocator->set_used(cl.total_used()); |
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
6698 } |
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
6699 assert(_allocator->used_unlocked() == recalculate_used(), |
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
6700 err_msg("inconsistent _allocator->used_unlocked(), " |
4072 | 6701 "value: "SIZE_FORMAT" recalculated: "SIZE_FORMAT, |
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
6702 _allocator->used_unlocked(), recalculate_used())); |
342 | 6703 } |
6704 | |
6705 void G1CollectedHeap::set_refine_cte_cl_concurrency(bool concurrent) { | |
6706 _refine_cte_cl->set_concurrent(concurrent); | |
6707 } | |
6708 | |
6709 bool G1CollectedHeap::is_in_closed_subset(const void* p) const { | |
6710 HeapRegion* hr = heap_region_containing(p); | |
20335
eec72fa4b108
8040722: G1: Clean up usages of heap_region_containing
brutisso
parents:
20334
diff
changeset
|
6711 return hr->is_in(p); |
342 | 6712 } |
2152 | 6713 |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6714 // Methods for the mutator alloc region |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6715 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6716 HeapRegion* G1CollectedHeap::new_mutator_alloc_region(size_t word_size, |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6717 bool force) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6718 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6719 assert(!force || g1_policy()->can_expand_young_list(), |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6720 "if force is true we should be able to expand the young list"); |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6721 bool young_list_full = g1_policy()->is_young_list_full(); |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6722 if (force || !young_list_full) { |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6723 HeapRegion* new_alloc_region = new_region(word_size, |
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
17759
diff
changeset
|
6724 false /* is_old */, |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6725 false /* do_expand */); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6726 if (new_alloc_region != NULL) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6727 set_region_short_lived_locked(new_alloc_region); |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6728 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Eden, young_list_full); |
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6729 check_bitmaps("Mutator Region Allocation", new_alloc_region); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6730 return new_alloc_region; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6731 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6732 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6733 return NULL; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6734 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6735 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6736 void G1CollectedHeap::retire_mutator_alloc_region(HeapRegion* alloc_region, |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6737 size_t allocated_bytes) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6738 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
20481
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
6739 assert(alloc_region->is_eden(), "all mutator alloc regions should be eden"); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6740 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6741 g1_policy()->add_region_to_incremental_cset_lhs(alloc_region); |
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
6742 _allocator->increase_used(allocated_bytes); |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6743 _hr_printer.retire(alloc_region); |
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6744 // We update the eden sizes here, when the region is retired, |
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6745 // 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
|
6746 // used space has been recored in _summary_bytes_used. |
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6747 g1mm()->update_eden_size(); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6748 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6749 |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6750 void G1CollectedHeap::set_par_threads() { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6751 // 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
|
6752 // in the workgroup. |
4711 | 6753 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
|
6754 uint n_workers = workers()->active_workers(); |
4711 | 6755 assert(UseDynamicNumberOfGCThreads || |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6756 n_workers == workers()->total_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6757 "Otherwise should be using the total number of workers"); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6758 if (n_workers == 0) { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6759 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
|
6760 n_workers = ParallelGCThreads; |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6761 workers()->set_active_workers(n_workers); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6762 } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6763 set_par_threads(n_workers); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6764 } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6765 |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6766 // Methods for the GC alloc regions |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6767 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6768 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
|
6769 uint count, |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6770 GCAllocPurpose ap) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6771 assert(FreeList_lock->owned_by_self(), "pre-condition"); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6772 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6773 if (count < g1_policy()->max_regions(ap)) { |
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
17759
diff
changeset
|
6774 bool survivor = (ap == GCAllocForSurvived); |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6775 HeapRegion* new_alloc_region = new_region(word_size, |
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
17759
diff
changeset
|
6776 !survivor, |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6777 true /* do_expand */); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6778 if (new_alloc_region != NULL) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6779 // We really only need to do this for old regions given that we |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6780 // should never scan survivors. But it doesn't hurt to do it |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6781 // for survivors too. |
20274
a8137787acfe
8047821: G1 Does not use the save_marks functionality as intended
mgerdin
parents:
20270
diff
changeset
|
6782 new_alloc_region->record_top_and_timestamp(); |
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
17759
diff
changeset
|
6783 if (survivor) { |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6784 new_alloc_region->set_survivor(); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6785 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Survivor); |
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6786 check_bitmaps("Survivor Region Allocation", new_alloc_region); |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6787 } else { |
20481
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
6788 new_alloc_region->set_old(); |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6789 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Old); |
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6790 check_bitmaps("Old Region Allocation", new_alloc_region); |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6791 } |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
6792 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
|
6793 new_alloc_region->note_start_of_copying(during_im); |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6794 return new_alloc_region; |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6795 } else { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6796 g1_policy()->note_alloc_region_limit_reached(ap); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6797 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6798 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6799 return NULL; |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6800 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6801 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6802 void G1CollectedHeap::retire_gc_alloc_region(HeapRegion* alloc_region, |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6803 size_t allocated_bytes, |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6804 GCAllocPurpose ap) { |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
6805 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
|
6806 alloc_region->note_end_of_copying(during_im); |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6807 g1_policy()->record_bytes_copied_during_gc(allocated_bytes); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6808 if (ap == GCAllocForSurvived) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6809 young_list()->add_survivor_region(alloc_region); |
4072 | 6810 } else { |
6811 _old_set.add(alloc_region); | |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6812 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6813 _hr_printer.retire(alloc_region); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6814 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6815 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6816 // Heap region set verification |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6817 |
2152 | 6818 class VerifyRegionListsClosure : public HeapRegionClosure { |
6819 private: | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6820 HeapRegionSet* _old_set; |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6821 HeapRegionSet* _humongous_set; |
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6822 HeapRegionManager* _hrm; |
2152 | 6823 |
6824 public: | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6825 HeapRegionSetCount _old_count; |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6826 HeapRegionSetCount _humongous_count; |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6827 HeapRegionSetCount _free_count; |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6828 |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6829 VerifyRegionListsClosure(HeapRegionSet* old_set, |
58fc1b1523dc
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6830 HeapRegionSet* humongous_set, |
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6831 HeapRegionManager* hrm) : |
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6832 _old_set(old_set), _humongous_set(humongous_set), _hrm(hrm), |
17736
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6833 _old_count(), _humongous_count(), _free_count(){ } |
2152 | 6834 |
6835 bool doHeapRegion(HeapRegion* hr) { | |
6836 if (hr->continuesHumongous()) { | |
6837 return false; | |
6838 } | |
6839 | |
6840 if (hr->is_young()) { | |
6841 // TODO | |
6842 } else if (hr->startsHumongous()) { | |
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6843 assert(hr->containing_set() == _humongous_set, err_msg("Heap region %u is starts humongous but not in humongous set.", hr->hrm_index())); |
17736
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6844 _humongous_count.increment(1u, hr->capacity()); |
2152 | 6845 } else if (hr->is_empty()) { |
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6846 assert(_hrm->is_free(hr), err_msg("Heap region %u is empty but not on the free list.", hr->hrm_index())); |
17736
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6847 _free_count.increment(1u, hr->capacity()); |
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6848 } else if (hr->is_old()) { |
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6849 assert(hr->containing_set() == _old_set, err_msg("Heap region %u is old but not in the old set.", hr->hrm_index())); |
17736
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6850 _old_count.increment(1u, hr->capacity()); |
20481
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6851 } else { |
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6852 ShouldNotReachHere(); |
2152 | 6853 } |
6854 return false; | |
6855 } | |
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6856 |
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6857 void verify_counts(HeapRegionSet* old_set, HeapRegionSet* humongous_set, HeapRegionManager* free_list) { |
17736
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6858 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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6859 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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6860 old_set->total_capacity_bytes(), _old_count.capacity())); |
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6861 |
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6862 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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6863 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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6864 humongous_set->total_capacity_bytes(), _humongous_count.capacity())); |
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6865 |
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6866 guarantee(free_list->num_free_regions() == _free_count.length(), err_msg("Free list count mismatch. Expected %u, actual %u.", free_list->num_free_regions(), _free_count.length())); |
17736
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6867 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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6868 free_list->total_capacity_bytes(), _free_count.capacity())); |
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6869 } |
2152 | 6870 }; |
6871 | |
6872 void G1CollectedHeap::verify_region_sets() { | |
6873 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); | |
6874 | |
6875 // First, check the explicit lists. | |
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6876 _hrm.verify(); |
2152 | 6877 { |
6878 // Given that a concurrent operation might be adding regions to | |
6879 // the secondary free list we have to take the lock before | |
6880 // verifying it. | |
6881 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
17736
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6882 _secondary_free_list.verify_list(); |
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6883 } |
2152 | 6884 |
6885 // If a concurrent region freeing operation is in progress it will | |
6886 // be difficult to correctly attributed any free regions we come | |
6887 // across to the correct free list given that they might belong to | |
6888 // one of several (free_list, secondary_free_list, any local lists, | |
6889 // etc.). So, if that's the case we will skip the rest of the | |
6890 // verification operation. Alternatively, waiting for the concurrent | |
6891 // operation to complete will have a non-trivial effect on the GC's | |
6892 // operation (no concurrent operation will last longer than the | |
6893 // interval between two calls to verification) and it might hide | |
6894 // any issues that we would like to catch during testing. | |
6895 if (free_regions_coming()) { | |
6896 return; | |
6897 } | |
6898 | |
2361 | 6899 // Make sure we append the secondary_free_list on the free_list so |
6900 // that all free regions we will come across can be safely | |
6901 // attributed to the free_list. | |
6902 append_secondary_free_list_if_not_empty_with_lock(); | |
2152 | 6903 |
6904 // Finally, make sure that the region accounting in the lists is | |
6905 // consistent with what we see in the heap. | |
6906 | |
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6907 VerifyRegionListsClosure cl(&_old_set, &_humongous_set, &_hrm); |
2152 | 6908 heap_region_iterate(&cl); |
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6909 cl.verify_counts(&_old_set, &_humongous_set, &_hrm); |
342 | 6910 } |
12080 | 6911 |
6912 // Optimized nmethod scanning | |
6913 | |
6914 class RegisterNMethodOopClosure: public OopClosure { | |
6915 G1CollectedHeap* _g1h; | |
6916 nmethod* _nm; | |
6917 | |
6918 template <class T> void do_oop_work(T* p) { | |
6919 T heap_oop = oopDesc::load_heap_oop(p); | |
6920 if (!oopDesc::is_null(heap_oop)) { | |
6921 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
6922 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
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6923 assert(!hr->continuesHumongous(), |
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6924 err_msg("trying to add code root "PTR_FORMAT" in continuation of humongous region "HR_FORMAT |
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6925 " starting at "HR_FORMAT, |
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6926 _nm, HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()))); |
12080 | 6927 |
20494 | 6928 // HeapRegion::add_strong_code_root_locked() avoids adding duplicate entries. |
6929 hr->add_strong_code_root_locked(_nm); | |
12080 | 6930 } |
6931 } | |
6932 | |
6933 public: | |
6934 RegisterNMethodOopClosure(G1CollectedHeap* g1h, nmethod* nm) : | |
6935 _g1h(g1h), _nm(nm) {} | |
6936 | |
6937 void do_oop(oop* p) { do_oop_work(p); } | |
6938 void do_oop(narrowOop* p) { do_oop_work(p); } | |
6939 }; | |
6940 | |
6941 class UnregisterNMethodOopClosure: public OopClosure { | |
6942 G1CollectedHeap* _g1h; | |
6943 nmethod* _nm; | |
6944 | |
6945 template <class T> void do_oop_work(T* p) { | |
6946 T heap_oop = oopDesc::load_heap_oop(p); | |
6947 if (!oopDesc::is_null(heap_oop)) { | |
6948 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
6949 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
13062
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6950 assert(!hr->continuesHumongous(), |
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6951 err_msg("trying to remove code root "PTR_FORMAT" in continuation of humongous region "HR_FORMAT |
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6952 " starting at "HR_FORMAT, |
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6953 _nm, HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()))); |
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6954 |
12080 | 6955 hr->remove_strong_code_root(_nm); |
6956 } | |
6957 } | |
6958 | |
6959 public: | |
6960 UnregisterNMethodOopClosure(G1CollectedHeap* g1h, nmethod* nm) : | |
6961 _g1h(g1h), _nm(nm) {} | |
6962 | |
6963 void do_oop(oop* p) { do_oop_work(p); } | |
6964 void do_oop(narrowOop* p) { do_oop_work(p); } | |
6965 }; | |
6966 | |
6967 void G1CollectedHeap::register_nmethod(nmethod* nm) { | |
6968 CollectedHeap::register_nmethod(nm); | |
6969 | |
6970 guarantee(nm != NULL, "sanity"); | |
6971 RegisterNMethodOopClosure reg_cl(this, nm); | |
6972 nm->oops_do(®_cl); | |
6973 } | |
6974 | |
6975 void G1CollectedHeap::unregister_nmethod(nmethod* nm) { | |
6976 CollectedHeap::unregister_nmethod(nm); | |
6977 | |
6978 guarantee(nm != NULL, "sanity"); | |
6979 UnregisterNMethodOopClosure reg_cl(this, nm); | |
6980 nm->oops_do(®_cl, true); | |
6981 } | |
6982 | |
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6983 void G1CollectedHeap::purge_code_root_memory() { |
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6984 double purge_start = os::elapsedTime(); |
20494 | 6985 G1CodeRootSet::purge(); |
17753
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6986 double purge_time_ms = (os::elapsedTime() - purge_start) * 1000.0; |
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6987 g1_policy()->phase_times()->record_strong_code_root_purge_time(purge_time_ms); |
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6988 } |
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6989 |
12080 | 6990 class RebuildStrongCodeRootClosure: public CodeBlobClosure { |
6991 G1CollectedHeap* _g1h; | |
6992 | |
6993 public: | |
6994 RebuildStrongCodeRootClosure(G1CollectedHeap* g1h) : | |
6995 _g1h(g1h) {} | |
6996 | |
6997 void do_code_blob(CodeBlob* cb) { | |
6998 nmethod* nm = (cb != NULL) ? cb->as_nmethod_or_null() : NULL; | |
6999 if (nm == NULL) { | |
7000 return; | |
7001 } | |
7002 | |
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fd81a5764900
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7003 if (ScavengeRootsInCode) { |
12080 | 7004 _g1h->register_nmethod(nm); |
7005 } | |
7006 } | |
7007 }; | |
7008 | |
7009 void G1CollectedHeap::rebuild_strong_code_roots() { | |
7010 RebuildStrongCodeRootClosure blob_cl(this); | |
7011 CodeCache::blobs_do(&blob_cl); | |
7012 } |