Mercurial > hg > graal-jvmci-8
annotate src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp @ 24234:ea6f94ab283b default tip
Added tag jvmci-0.36 for changeset 8128b98d4736
author | Gilles Duboscq <gilles.m.duboscq@oracle.com> |
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date | Mon, 18 Sep 2017 18:49:45 +0200 |
parents | f13e777eb255 |
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rev | line source |
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342 | 1 /* |
22936 | 2 * Copyright (c) 2001, 2015, 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" |
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30 #include "classfile/metadataOnStackMark.hpp" |
12080 | 31 #include "code/codeCache.hpp" |
1972 | 32 #include "code/icBuffer.hpp" |
33 #include "gc_implementation/g1/bufferingOopClosure.hpp" | |
34 #include "gc_implementation/g1/concurrentG1Refine.hpp" | |
35 #include "gc_implementation/g1/concurrentG1RefineThread.hpp" | |
36 #include "gc_implementation/g1/concurrentMarkThread.inline.hpp" | |
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37 #include "gc_implementation/g1/g1AllocRegion.inline.hpp" |
1972 | 38 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" |
39 #include "gc_implementation/g1/g1CollectorPolicy.hpp" | |
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40 #include "gc_implementation/g1/g1ErgoVerbose.hpp" |
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41 #include "gc_implementation/g1/g1EvacFailure.hpp" |
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42 #include "gc_implementation/g1/g1GCPhaseTimes.hpp" |
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43 #include "gc_implementation/g1/g1Log.hpp" |
1972 | 44 #include "gc_implementation/g1/g1MarkSweep.hpp" |
45 #include "gc_implementation/g1/g1OopClosures.inline.hpp" | |
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46 #include "gc_implementation/g1/g1ParScanThreadState.inline.hpp" |
20337 | 47 #include "gc_implementation/g1/g1RegionToSpaceMapper.hpp" |
1972 | 48 #include "gc_implementation/g1/g1RemSet.inline.hpp" |
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49 #include "gc_implementation/g1/g1RootProcessor.hpp" |
17764 | 50 #include "gc_implementation/g1/g1StringDedup.hpp" |
10405 | 51 #include "gc_implementation/g1/g1YCTypes.hpp" |
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52 #include "gc_implementation/g1/heapRegion.inline.hpp" |
1972 | 53 #include "gc_implementation/g1/heapRegionRemSet.hpp" |
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54 #include "gc_implementation/g1/heapRegionSet.inline.hpp" |
1972 | 55 #include "gc_implementation/g1/vm_operations_g1.hpp" |
10405 | 56 #include "gc_implementation/shared/gcHeapSummary.hpp" |
57 #include "gc_implementation/shared/gcTimer.hpp" | |
58 #include "gc_implementation/shared/gcTrace.hpp" | |
59 #include "gc_implementation/shared/gcTraceTime.hpp" | |
1972 | 60 #include "gc_implementation/shared/isGCActiveMark.hpp" |
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61 #include "memory/allocation.hpp" |
1972 | 62 #include "memory/gcLocker.inline.hpp" |
63 #include "memory/generationSpec.hpp" | |
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64 #include "memory/iterator.hpp" |
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65 #include "memory/referenceProcessor.hpp" |
1972 | 66 #include "oops/oop.inline.hpp" |
67 #include "oops/oop.pcgc.inline.hpp" | |
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68 #include "runtime/orderAccess.inline.hpp" |
1972 | 69 #include "runtime/vmThread.hpp" |
342 | 70 |
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71 size_t G1CollectedHeap::_humongous_object_threshold_in_words = 0; |
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72 |
342 | 73 // turn it on so that the contents of the young list (scan-only / |
74 // to-be-collected) are printed at "strategic" points before / during | |
75 // / after the collection --- this is useful for debugging | |
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76 #define YOUNG_LIST_VERBOSE 0 |
342 | 77 // CURRENT STATUS |
78 // This file is under construction. Search for "FIXME". | |
79 | |
80 // INVARIANTS/NOTES | |
81 // | |
82 // All allocation activity covered by the G1CollectedHeap interface is | |
1973 | 83 // serialized by acquiring the HeapLock. This happens in mem_allocate |
84 // and allocate_new_tlab, which are the "entry" points to the | |
85 // allocation code from the rest of the JVM. (Note that this does not | |
86 // apply to TLAB allocation, which is not part of this interface: it | |
87 // is done by clients of this interface.) | |
342 | 88 |
89 // Local to this file. | |
90 | |
91 class RefineCardTableEntryClosure: public CardTableEntryClosure { | |
92 bool _concurrent; | |
93 public: | |
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94 RefineCardTableEntryClosure() : _concurrent(true) { } |
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95 |
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96 bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
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97 bool oops_into_cset = G1CollectedHeap::heap()->g1_rem_set()->refine_card(card_ptr, worker_i, false); |
1705 | 98 // This path is executed by the concurrent refine or mutator threads, |
99 // concurrently, and so we do not care if card_ptr contains references | |
100 // that point into the collection set. | |
101 assert(!oops_into_cset, "should be"); | |
102 | |
20192 | 103 if (_concurrent && SuspendibleThreadSet::should_yield()) { |
342 | 104 // Caller will actually yield. |
105 return false; | |
106 } | |
107 // Otherwise, we finished successfully; return true. | |
108 return true; | |
109 } | |
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110 |
342 | 111 void set_concurrent(bool b) { _concurrent = b; } |
112 }; | |
113 | |
114 | |
115 class ClearLoggedCardTableEntryClosure: public CardTableEntryClosure { | |
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116 size_t _num_processed; |
342 | 117 CardTableModRefBS* _ctbs; |
118 int _histo[256]; | |
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119 |
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120 public: |
342 | 121 ClearLoggedCardTableEntryClosure() : |
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122 _num_processed(0), _ctbs(G1CollectedHeap::heap()->g1_barrier_set()) |
342 | 123 { |
124 for (int i = 0; i < 256; i++) _histo[i] = 0; | |
125 } | |
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126 |
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127 bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
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128 unsigned char* ujb = (unsigned char*)card_ptr; |
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129 int ind = (int)(*ujb); |
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130 _histo[ind]++; |
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131 |
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132 *card_ptr = (jbyte)CardTableModRefBS::clean_card_val(); |
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133 _num_processed++; |
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134 |
342 | 135 return true; |
136 } | |
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137 |
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138 size_t num_processed() { return _num_processed; } |
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139 |
342 | 140 void print_histo() { |
141 gclog_or_tty->print_cr("Card table value histogram:"); | |
142 for (int i = 0; i < 256; i++) { | |
143 if (_histo[i] != 0) { | |
144 gclog_or_tty->print_cr(" %d: %d", i, _histo[i]); | |
145 } | |
146 } | |
147 } | |
148 }; | |
149 | |
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150 class RedirtyLoggedCardTableEntryClosure : public CardTableEntryClosure { |
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151 private: |
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152 size_t _num_processed; |
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153 |
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154 public: |
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155 RedirtyLoggedCardTableEntryClosure() : CardTableEntryClosure(), _num_processed(0) { } |
12343 | 156 |
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157 bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
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158 *card_ptr = CardTableModRefBS::dirty_card_val(); |
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159 _num_processed++; |
342 | 160 return true; |
161 } | |
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162 |
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163 size_t num_processed() const { return _num_processed; } |
342 | 164 }; |
165 | |
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166 YoungList::YoungList(G1CollectedHeap* g1h) : |
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167 _g1h(g1h), _head(NULL), _length(0), _last_sampled_rs_lengths(0), |
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168 _survivor_head(NULL), _survivor_tail(NULL), _survivor_length(0) { |
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169 guarantee(check_list_empty(false), "just making sure..."); |
342 | 170 } |
171 | |
172 void YoungList::push_region(HeapRegion *hr) { | |
173 assert(!hr->is_young(), "should not already be young"); | |
174 assert(hr->get_next_young_region() == NULL, "cause it should!"); | |
175 | |
176 hr->set_next_young_region(_head); | |
177 _head = hr; | |
178 | |
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179 _g1h->g1_policy()->set_region_eden(hr, (int) _length); |
342 | 180 ++_length; |
181 } | |
182 | |
183 void YoungList::add_survivor_region(HeapRegion* hr) { | |
545 | 184 assert(hr->is_survivor(), "should be flagged as survivor region"); |
342 | 185 assert(hr->get_next_young_region() == NULL, "cause it should!"); |
186 | |
187 hr->set_next_young_region(_survivor_head); | |
188 if (_survivor_head == NULL) { | |
545 | 189 _survivor_tail = hr; |
342 | 190 } |
191 _survivor_head = hr; | |
192 ++_survivor_length; | |
193 } | |
194 | |
195 void YoungList::empty_list(HeapRegion* list) { | |
196 while (list != NULL) { | |
197 HeapRegion* next = list->get_next_young_region(); | |
198 list->set_next_young_region(NULL); | |
199 list->uninstall_surv_rate_group(); | |
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200 // This is called before a Full GC and all the non-empty / |
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201 // non-humongous regions at the end of the Full GC will end up as |
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202 // old anyway. |
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203 list->set_old(); |
342 | 204 list = next; |
205 } | |
206 } | |
207 | |
208 void YoungList::empty_list() { | |
209 assert(check_list_well_formed(), "young list should be well formed"); | |
210 | |
211 empty_list(_head); | |
212 _head = NULL; | |
213 _length = 0; | |
214 | |
215 empty_list(_survivor_head); | |
216 _survivor_head = NULL; | |
545 | 217 _survivor_tail = NULL; |
342 | 218 _survivor_length = 0; |
219 | |
220 _last_sampled_rs_lengths = 0; | |
221 | |
222 assert(check_list_empty(false), "just making sure..."); | |
223 } | |
224 | |
225 bool YoungList::check_list_well_formed() { | |
226 bool ret = true; | |
227 | |
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228 uint length = 0; |
342 | 229 HeapRegion* curr = _head; |
230 HeapRegion* last = NULL; | |
231 while (curr != NULL) { | |
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232 if (!curr->is_young()) { |
342 | 233 gclog_or_tty->print_cr("### YOUNG REGION "PTR_FORMAT"-"PTR_FORMAT" " |
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234 "incorrectly tagged (y: %d, surv: %d)", |
342 | 235 curr->bottom(), curr->end(), |
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236 curr->is_young(), curr->is_survivor()); |
342 | 237 ret = false; |
238 } | |
239 ++length; | |
240 last = curr; | |
241 curr = curr->get_next_young_region(); | |
242 } | |
243 ret = ret && (length == _length); | |
244 | |
245 if (!ret) { | |
246 gclog_or_tty->print_cr("### YOUNG LIST seems not well formed!"); | |
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247 gclog_or_tty->print_cr("### list has %u entries, _length is %u", |
342 | 248 length, _length); |
249 } | |
250 | |
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251 return ret; |
342 | 252 } |
253 | |
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254 bool YoungList::check_list_empty(bool check_sample) { |
342 | 255 bool ret = true; |
256 | |
257 if (_length != 0) { | |
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258 gclog_or_tty->print_cr("### YOUNG LIST should have 0 length, not %u", |
342 | 259 _length); |
260 ret = false; | |
261 } | |
262 if (check_sample && _last_sampled_rs_lengths != 0) { | |
263 gclog_or_tty->print_cr("### YOUNG LIST has non-zero last sampled RS lengths"); | |
264 ret = false; | |
265 } | |
266 if (_head != NULL) { | |
267 gclog_or_tty->print_cr("### YOUNG LIST does not have a NULL head"); | |
268 ret = false; | |
269 } | |
270 if (!ret) { | |
271 gclog_or_tty->print_cr("### YOUNG LIST does not seem empty"); | |
272 } | |
273 | |
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274 return ret; |
342 | 275 } |
276 | |
277 void | |
278 YoungList::rs_length_sampling_init() { | |
279 _sampled_rs_lengths = 0; | |
280 _curr = _head; | |
281 } | |
282 | |
283 bool | |
284 YoungList::rs_length_sampling_more() { | |
285 return _curr != NULL; | |
286 } | |
287 | |
288 void | |
289 YoungList::rs_length_sampling_next() { | |
290 assert( _curr != NULL, "invariant" ); | |
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291 size_t rs_length = _curr->rem_set()->occupied(); |
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292 |
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293 _sampled_rs_lengths += rs_length; |
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294 |
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295 // The current region may not yet have been added to the |
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296 // incremental collection set (it gets added when it is |
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297 // retired as the current allocation region). |
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298 if (_curr->in_collection_set()) { |
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299 // Update the collection set policy information for this region |
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300 _g1h->g1_policy()->update_incremental_cset_info(_curr, rs_length); |
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301 } |
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302 |
342 | 303 _curr = _curr->get_next_young_region(); |
304 if (_curr == NULL) { | |
305 _last_sampled_rs_lengths = _sampled_rs_lengths; | |
306 // gclog_or_tty->print_cr("last sampled RS lengths = %d", _last_sampled_rs_lengths); | |
307 } | |
308 } | |
309 | |
310 void | |
311 YoungList::reset_auxilary_lists() { | |
312 guarantee( is_empty(), "young list should be empty" ); | |
313 assert(check_list_well_formed(), "young list should be well formed"); | |
314 | |
315 // Add survivor regions to SurvRateGroup. | |
316 _g1h->g1_policy()->note_start_adding_survivor_regions(); | |
545 | 317 _g1h->g1_policy()->finished_recalculating_age_indexes(true /* is_survivors */); |
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318 |
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319 int young_index_in_cset = 0; |
342 | 320 for (HeapRegion* curr = _survivor_head; |
321 curr != NULL; | |
322 curr = curr->get_next_young_region()) { | |
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323 _g1h->g1_policy()->set_region_survivor(curr, young_index_in_cset); |
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324 |
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325 // The region is a non-empty survivor so let's add it to |
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326 // the incremental collection set for the next evacuation |
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327 // pause. |
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328 _g1h->g1_policy()->add_region_to_incremental_cset_rhs(curr); |
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329 young_index_in_cset += 1; |
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330 } |
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331 assert((uint) young_index_in_cset == _survivor_length, "post-condition"); |
342 | 332 _g1h->g1_policy()->note_stop_adding_survivor_regions(); |
333 | |
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334 _head = _survivor_head; |
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335 _length = _survivor_length; |
342 | 336 if (_survivor_head != NULL) { |
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337 assert(_survivor_tail != NULL, "cause it shouldn't be"); |
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338 assert(_survivor_length > 0, "invariant"); |
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339 _survivor_tail->set_next_young_region(NULL); |
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340 } |
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341 |
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342 // Don't clear the survivor list handles until the start of |
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343 // the next evacuation pause - we need it in order to re-tag |
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344 // the survivor regions from this evacuation pause as 'young' |
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345 // at the start of the next. |
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346 |
545 | 347 _g1h->g1_policy()->finished_recalculating_age_indexes(false /* is_survivors */); |
342 | 348 |
349 assert(check_list_well_formed(), "young list should be well formed"); | |
350 } | |
351 | |
352 void YoungList::print() { | |
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353 HeapRegion* lists[] = {_head, _survivor_head}; |
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354 const char* names[] = {"YOUNG", "SURVIVOR"}; |
342 | 355 |
22936 | 356 for (uint list = 0; list < ARRAY_SIZE(lists); ++list) { |
342 | 357 gclog_or_tty->print_cr("%s LIST CONTENTS", names[list]); |
358 HeapRegion *curr = lists[list]; | |
359 if (curr == NULL) | |
360 gclog_or_tty->print_cr(" empty"); | |
361 while (curr != NULL) { | |
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362 gclog_or_tty->print_cr(" "HR_FORMAT", P: "PTR_FORMAT ", N: "PTR_FORMAT", age: %4d", |
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363 HR_FORMAT_PARAMS(curr), |
342 | 364 curr->prev_top_at_mark_start(), |
365 curr->next_top_at_mark_start(), | |
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366 curr->age_in_surv_rate_group_cond()); |
342 | 367 curr = curr->get_next_young_region(); |
368 } | |
369 } | |
370 | |
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371 gclog_or_tty->cr(); |
342 | 372 } |
373 | |
20337 | 374 void G1RegionMappingChangedListener::reset_from_card_cache(uint start_idx, size_t num_regions) { |
375 OtherRegionsTable::invalidate(start_idx, num_regions); | |
376 } | |
377 | |
20543 | 378 void G1RegionMappingChangedListener::on_commit(uint start_idx, size_t num_regions, bool zero_filled) { |
379 // The from card cache is not the memory that is actually committed. So we cannot | |
380 // take advantage of the zero_filled parameter. | |
20337 | 381 reset_from_card_cache(start_idx, num_regions); |
382 } | |
383 | |
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384 void G1CollectedHeap::push_dirty_cards_region(HeapRegion* hr) |
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385 { |
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386 // Claim the right to put the region on the dirty cards region list |
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387 // by installing a self pointer. |
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388 HeapRegion* next = hr->get_next_dirty_cards_region(); |
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389 if (next == NULL) { |
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390 HeapRegion* res = (HeapRegion*) |
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391 Atomic::cmpxchg_ptr(hr, hr->next_dirty_cards_region_addr(), |
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392 NULL); |
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393 if (res == NULL) { |
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394 HeapRegion* head; |
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395 do { |
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396 // Put the region to the dirty cards region list. |
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397 head = _dirty_cards_region_list; |
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398 next = (HeapRegion*) |
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399 Atomic::cmpxchg_ptr(hr, &_dirty_cards_region_list, head); |
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400 if (next == head) { |
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401 assert(hr->get_next_dirty_cards_region() == hr, |
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402 "hr->get_next_dirty_cards_region() != hr"); |
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403 if (next == NULL) { |
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404 // The last region in the list points to itself. |
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405 hr->set_next_dirty_cards_region(hr); |
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406 } else { |
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407 hr->set_next_dirty_cards_region(next); |
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408 } |
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409 } |
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410 } while (next != head); |
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411 } |
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412 } |
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413 } |
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414 |
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415 HeapRegion* G1CollectedHeap::pop_dirty_cards_region() |
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416 { |
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417 HeapRegion* head; |
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418 HeapRegion* hr; |
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419 do { |
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420 head = _dirty_cards_region_list; |
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421 if (head == NULL) { |
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422 return NULL; |
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423 } |
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424 HeapRegion* new_head = head->get_next_dirty_cards_region(); |
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425 if (head == new_head) { |
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426 // The last region. |
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427 new_head = NULL; |
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428 } |
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429 hr = (HeapRegion*)Atomic::cmpxchg_ptr(new_head, &_dirty_cards_region_list, |
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430 head); |
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431 } while (hr != head); |
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432 assert(hr != NULL, "invariant"); |
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433 hr->set_next_dirty_cards_region(NULL); |
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434 return hr; |
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435 } |
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436 |
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437 #ifdef ASSERT |
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438 // A region is added to the collection set as it is retired |
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439 // so an address p can point to a region which will be in the |
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440 // collection set but has not yet been retired. This method |
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441 // therefore is only accurate during a GC pause after all |
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442 // regions have been retired. It is used for debugging |
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443 // to check if an nmethod has references to objects that can |
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444 // be move during a partial collection. Though it can be |
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445 // inaccurate, it is sufficient for G1 because the conservative |
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446 // implementation of is_scavengable() for G1 will indicate that |
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447 // all nmethods must be scanned during a partial collection. |
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448 bool G1CollectedHeap::is_in_partial_collection(const void* p) { |
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449 if (p == NULL) { |
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450 return false; |
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451 } |
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452 return heap_region_containing(p)->in_collection_set(); |
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453 } |
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454 #endif |
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455 |
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456 // Returns true if the reference points to an object that |
10405 | 457 // can move in an incremental collection. |
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458 bool G1CollectedHeap::is_scavengable(const void* p) { |
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459 HeapRegion* hr = heap_region_containing(p); |
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460 return !hr->isHumongous(); |
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461 } |
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462 |
342 | 463 void G1CollectedHeap::check_ct_logs_at_safepoint() { |
464 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
12343 | 465 CardTableModRefBS* ct_bs = g1_barrier_set(); |
342 | 466 |
467 // Count the dirty cards at the start. | |
468 CountNonCleanMemRegionClosure count1(this); | |
469 ct_bs->mod_card_iterate(&count1); | |
470 int orig_count = count1.n(); | |
471 | |
472 // First clear the logged cards. | |
473 ClearLoggedCardTableEntryClosure clear; | |
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474 dcqs.apply_closure_to_all_completed_buffers(&clear); |
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475 dcqs.iterate_closure_all_threads(&clear, false); |
342 | 476 clear.print_histo(); |
477 | |
478 // Now ensure that there's no dirty cards. | |
479 CountNonCleanMemRegionClosure count2(this); | |
480 ct_bs->mod_card_iterate(&count2); | |
481 if (count2.n() != 0) { | |
482 gclog_or_tty->print_cr("Card table has %d entries; %d originally", | |
483 count2.n(), orig_count); | |
484 } | |
485 guarantee(count2.n() == 0, "Card table should be clean."); | |
486 | |
487 RedirtyLoggedCardTableEntryClosure redirty; | |
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488 dcqs.apply_closure_to_all_completed_buffers(&redirty); |
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489 dcqs.iterate_closure_all_threads(&redirty, false); |
342 | 490 gclog_or_tty->print_cr("Log entries = %d, dirty cards = %d.", |
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491 clear.num_processed(), orig_count); |
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492 guarantee(redirty.num_processed() == clear.num_processed(), |
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493 err_msg("Redirtied "SIZE_FORMAT" cards, bug cleared "SIZE_FORMAT, |
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494 redirty.num_processed(), clear.num_processed())); |
342 | 495 |
496 CountNonCleanMemRegionClosure count3(this); | |
497 ct_bs->mod_card_iterate(&count3); | |
498 if (count3.n() != orig_count) { | |
499 gclog_or_tty->print_cr("Should have restored them all: orig = %d, final = %d.", | |
500 orig_count, count3.n()); | |
501 guarantee(count3.n() >= orig_count, "Should have restored them all."); | |
502 } | |
503 } | |
504 | |
505 // Private class members. | |
506 | |
507 G1CollectedHeap* G1CollectedHeap::_g1h; | |
508 | |
509 // Private methods. | |
510 | |
2152 | 511 HeapRegion* |
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512 G1CollectedHeap::new_region_try_secondary_free_list(bool is_old) { |
2152 | 513 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
514 while (!_secondary_free_list.is_empty() || free_regions_coming()) { | |
515 if (!_secondary_free_list.is_empty()) { | |
516 if (G1ConcRegionFreeingVerbose) { | |
517 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
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518 "secondary_free_list has %u entries", |
2152 | 519 _secondary_free_list.length()); |
520 } | |
521 // It looks as if there are free regions available on the | |
522 // secondary_free_list. Let's move them to the free_list and try | |
523 // again to allocate from it. | |
524 append_secondary_free_list(); | |
525 | |
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526 assert(_hrm.num_free_regions() > 0, "if the secondary_free_list was not " |
2152 | 527 "empty we should have moved at least one entry to the free_list"); |
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528 HeapRegion* res = _hrm.allocate_free_region(is_old); |
2152 | 529 if (G1ConcRegionFreeingVerbose) { |
530 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
531 "allocated "HR_FORMAT" from secondary_free_list", | |
532 HR_FORMAT_PARAMS(res)); | |
533 } | |
534 return res; | |
535 } | |
536 | |
10405 | 537 // Wait here until we get notified either when (a) there are no |
2152 | 538 // more free regions coming or (b) some regions have been moved on |
539 // the secondary_free_list. | |
540 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
541 } | |
542 | |
543 if (G1ConcRegionFreeingVerbose) { | |
544 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
545 "could not allocate from secondary_free_list"); | |
546 } | |
547 return NULL; | |
548 } | |
549 | |
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550 HeapRegion* G1CollectedHeap::new_region(size_t word_size, bool is_old, bool do_expand) { |
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551 assert(!isHumongous(word_size) || word_size <= HeapRegion::GrainWords, |
2152 | 552 "the only time we use this to allocate a humongous region is " |
553 "when we are allocating a single humongous region"); | |
554 | |
555 HeapRegion* res; | |
556 if (G1StressConcRegionFreeing) { | |
557 if (!_secondary_free_list.is_empty()) { | |
558 if (G1ConcRegionFreeingVerbose) { | |
559 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
560 "forced to look at the secondary_free_list"); | |
561 } | |
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562 res = new_region_try_secondary_free_list(is_old); |
2152 | 563 if (res != NULL) { |
564 return res; | |
565 } | |
566 } | |
567 } | |
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568 |
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569 res = _hrm.allocate_free_region(is_old); |
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570 |
2152 | 571 if (res == NULL) { |
572 if (G1ConcRegionFreeingVerbose) { | |
573 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
574 "res == NULL, trying the secondary_free_list"); | |
575 } | |
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576 res = new_region_try_secondary_free_list(is_old); |
2152 | 577 } |
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578 if (res == NULL && do_expand && _expand_heap_after_alloc_failure) { |
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579 // Currently, only attempts to allocate GC alloc regions set |
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580 // do_expand to true. So, we should only reach here during a |
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581 // safepoint. If this assumption changes we might have to |
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582 // reconsider the use of _expand_heap_after_alloc_failure. |
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583 assert(SafepointSynchronize::is_at_safepoint(), "invariant"); |
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584 |
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585 ergo_verbose1(ErgoHeapSizing, |
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586 "attempt heap expansion", |
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587 ergo_format_reason("region allocation request failed") |
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588 ergo_format_byte("allocation request"), |
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589 word_size * HeapWordSize); |
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590 if (expand(word_size * HeapWordSize)) { |
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591 // Given that expand() succeeded in expanding the heap, and we |
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592 // always expand the heap by an amount aligned to the heap |
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593 // region size, the free list should in theory not be empty. |
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594 // In either case allocate_free_region() will check for NULL. |
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595 res = _hrm.allocate_free_region(is_old); |
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596 } else { |
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597 _expand_heap_after_alloc_failure = false; |
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598 } |
342 | 599 } |
600 return res; | |
601 } | |
602 | |
2361 | 603 HeapWord* |
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604 G1CollectedHeap::humongous_obj_allocate_initialize_regions(uint first, |
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605 uint num_regions, |
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606 size_t word_size, |
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607 AllocationContext_t context) { |
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608 assert(first != G1_NO_HRM_INDEX, "pre-condition"); |
2361 | 609 assert(isHumongous(word_size), "word_size should be humongous"); |
610 assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); | |
611 | |
612 // Index of last region in the series + 1. | |
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613 uint last = first + num_regions; |
2361 | 614 |
615 // We need to initialize the region(s) we just discovered. This is | |
616 // a bit tricky given that it can happen concurrently with | |
617 // refinement threads refining cards on these regions and | |
618 // potentially wanting to refine the BOT as they are scanning | |
619 // those cards (this can happen shortly after a cleanup; see CR | |
620 // 6991377). So we have to set up the region(s) carefully and in | |
621 // a specific order. | |
622 | |
623 // The word size sum of all the regions we will allocate. | |
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624 size_t word_size_sum = (size_t) num_regions * HeapRegion::GrainWords; |
2361 | 625 assert(word_size <= word_size_sum, "sanity"); |
626 | |
627 // This will be the "starts humongous" region. | |
3766 | 628 HeapRegion* first_hr = region_at(first); |
2361 | 629 // The header of the new object will be placed at the bottom of |
630 // the first region. | |
631 HeapWord* new_obj = first_hr->bottom(); | |
632 // This will be the new end of the first region in the series that | |
10405 | 633 // should also match the end of the last region in the series. |
2361 | 634 HeapWord* new_end = new_obj + word_size_sum; |
635 // This will be the new top of the first region that will reflect | |
636 // this allocation. | |
637 HeapWord* new_top = new_obj + word_size; | |
638 | |
639 // First, we need to zero the header of the space that we will be | |
640 // allocating. When we update top further down, some refinement | |
641 // threads might try to scan the region. By zeroing the header we | |
642 // ensure that any thread that will try to scan the region will | |
643 // come across the zero klass word and bail out. | |
644 // | |
645 // NOTE: It would not have been correct to have used | |
646 // CollectedHeap::fill_with_object() and make the space look like | |
647 // an int array. The thread that is doing the allocation will | |
648 // later update the object header to a potentially different array | |
649 // type and, for a very short period of time, the klass and length | |
650 // fields will be inconsistent. This could cause a refinement | |
651 // thread to calculate the object size incorrectly. | |
652 Copy::fill_to_words(new_obj, oopDesc::header_size(), 0); | |
653 | |
654 // We will set up the first region as "starts humongous". This | |
655 // will also update the BOT covering all the regions to reflect | |
656 // that there is a single object that starts at the bottom of the | |
657 // first region. | |
658 first_hr->set_startsHumongous(new_top, new_end); | |
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659 first_hr->set_allocation_context(context); |
2361 | 660 // Then, if there are any, we will set up the "continues |
661 // humongous" regions. | |
662 HeapRegion* hr = NULL; | |
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663 for (uint i = first + 1; i < last; ++i) { |
3766 | 664 hr = region_at(i); |
2361 | 665 hr->set_continuesHumongous(first_hr); |
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666 hr->set_allocation_context(context); |
2361 | 667 } |
668 // If we have "continues humongous" regions (hr != NULL), then the | |
669 // end of the last one should match new_end. | |
670 assert(hr == NULL || hr->end() == new_end, "sanity"); | |
671 | |
672 // Up to this point no concurrent thread would have been able to | |
673 // do any scanning on any region in this series. All the top | |
674 // fields still point to bottom, so the intersection between | |
675 // [bottom,top] and [card_start,card_end] will be empty. Before we | |
676 // update the top fields, we'll do a storestore to make sure that | |
677 // no thread sees the update to top before the zeroing of the | |
678 // object header and the BOT initialization. | |
679 OrderAccess::storestore(); | |
680 | |
681 // Now that the BOT and the object header have been initialized, | |
682 // we can update top of the "starts humongous" region. | |
683 assert(first_hr->bottom() < new_top && new_top <= first_hr->end(), | |
684 "new_top should be in this region"); | |
685 first_hr->set_top(new_top); | |
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686 if (_hr_printer.is_active()) { |
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687 HeapWord* bottom = first_hr->bottom(); |
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688 HeapWord* end = first_hr->orig_end(); |
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689 if ((first + 1) == last) { |
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690 // the series has a single humongous region |
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691 _hr_printer.alloc(G1HRPrinter::SingleHumongous, first_hr, new_top); |
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692 } else { |
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693 // the series has more than one humongous regions |
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694 _hr_printer.alloc(G1HRPrinter::StartsHumongous, first_hr, end); |
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695 } |
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696 } |
2361 | 697 |
698 // Now, we will update the top fields of the "continues humongous" | |
699 // regions. The reason we need to do this is that, otherwise, | |
700 // these regions would look empty and this will confuse parts of | |
701 // G1. For example, the code that looks for a consecutive number | |
702 // of empty regions will consider them empty and try to | |
703 // re-allocate them. We can extend is_empty() to also include | |
704 // !continuesHumongous(), but it is easier to just update the top | |
705 // fields here. The way we set top for all regions (i.e., top == | |
706 // end for all regions but the last one, top == new_top for the | |
707 // last one) is actually used when we will free up the humongous | |
708 // region in free_humongous_region(). | |
709 hr = NULL; | |
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710 for (uint i = first + 1; i < last; ++i) { |
3766 | 711 hr = region_at(i); |
2361 | 712 if ((i + 1) == last) { |
713 // last continues humongous region | |
714 assert(hr->bottom() < new_top && new_top <= hr->end(), | |
715 "new_top should fall on this region"); | |
716 hr->set_top(new_top); | |
3778
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717 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, new_top); |
2361 | 718 } else { |
719 // not last one | |
720 assert(new_top > hr->end(), "new_top should be above this region"); | |
721 hr->set_top(hr->end()); | |
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722 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, hr->end()); |
2361 | 723 } |
724 } | |
725 // If we have continues humongous regions (hr != NULL), then the | |
726 // end of the last one should match new_end and its top should | |
727 // match new_top. | |
728 assert(hr == NULL || | |
729 (hr->end() == new_end && hr->top() == new_top), "sanity"); | |
20291
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730 check_bitmaps("Humongous Region Allocation", first_hr); |
2361 | 731 |
732 assert(first_hr->used() == word_size * HeapWordSize, "invariant"); | |
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733 _allocator->increase_used(first_hr->used()); |
2361 | 734 _humongous_set.add(first_hr); |
735 | |
736 return new_obj; | |
737 } | |
738 | |
342 | 739 // If could fit into free regions w/o expansion, try. |
740 // Otherwise, if can expand, do so. | |
741 // Otherwise, if using ex regions might help, try with ex given back. | |
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742 HeapWord* G1CollectedHeap::humongous_obj_allocate(size_t word_size, AllocationContext_t context) { |
2152 | 743 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
744 | |
745 verify_region_sets_optional(); | |
342 | 746 |
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747 uint first = G1_NO_HRM_INDEX; |
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748 uint obj_regions = (uint)(align_size_up_(word_size, HeapRegion::GrainWords) / HeapRegion::GrainWords); |
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749 |
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750 if (obj_regions == 1) { |
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751 // Only one region to allocate, try to use a fast path by directly allocating |
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752 // from the free lists. Do not try to expand here, we will potentially do that |
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753 // later. |
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754 HeapRegion* hr = new_region(word_size, true /* is_old */, false /* do_expand */); |
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755 if (hr != NULL) { |
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756 first = hr->hrm_index(); |
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757 } |
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758 } else { |
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759 // We can't allocate humongous regions spanning more than one region while |
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760 // cleanupComplete() is running, since some of the regions we find to be |
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761 // empty might not yet be added to the free list. It is not straightforward |
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762 // to know in which list they are on so that we can remove them. We only |
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763 // need to do this if we need to allocate more than one region to satisfy the |
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764 // current humongous allocation request. If we are only allocating one region |
20337 | 765 // we use the one-region region allocation code (see above), that already |
766 // potentially waits for regions from the secondary free list. | |
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767 wait_while_free_regions_coming(); |
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768 append_secondary_free_list_if_not_empty_with_lock(); |
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769 |
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770 // Policy: Try only empty regions (i.e. already committed first). Maybe we |
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771 // are lucky enough to find some. |
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772 first = _hrm.find_contiguous_only_empty(obj_regions); |
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773 if (first != G1_NO_HRM_INDEX) { |
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774 _hrm.allocate_free_regions_starting_at(first, obj_regions); |
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775 } |
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776 } |
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777 |
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778 if (first == G1_NO_HRM_INDEX) { |
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779 // Policy: We could not find enough regions for the humongous object in the |
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780 // free list. Look through the heap to find a mix of free and uncommitted regions. |
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781 // If so, try expansion. |
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782 first = _hrm.find_contiguous_empty_or_unavailable(obj_regions); |
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783 if (first != G1_NO_HRM_INDEX) { |
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784 // We found something. Make sure these regions are committed, i.e. expand |
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785 // the heap. Alternatively we could do a defragmentation GC. |
3914
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786 ergo_verbose1(ErgoHeapSizing, |
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787 "attempt heap expansion", |
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788 ergo_format_reason("humongous allocation request failed") |
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789 ergo_format_byte("allocation request"), |
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790 word_size * HeapWordSize); |
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791 |
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792 _hrm.expand_at(first, obj_regions); |
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793 g1_policy()->record_new_heap_size(num_regions()); |
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794 |
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795 #ifdef ASSERT |
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796 for (uint i = first; i < first + obj_regions; ++i) { |
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797 HeapRegion* hr = region_at(i); |
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798 assert(hr->is_free(), "sanity"); |
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799 assert(hr->is_empty(), "sanity"); |
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800 assert(is_on_master_free_list(hr), "sanity"); |
2188
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801 } |
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802 #endif |
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803 _hrm.allocate_free_regions_starting_at(first, obj_regions); |
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804 } else { |
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805 // Policy: Potentially trigger a defragmentation GC. |
2152 | 806 } |
807 } | |
808 | |
2361 | 809 HeapWord* result = NULL; |
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810 if (first != G1_NO_HRM_INDEX) { |
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811 result = humongous_obj_allocate_initialize_regions(first, obj_regions, |
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812 word_size, context); |
2361 | 813 assert(result != NULL, "it should always return a valid result"); |
3980
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814 |
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815 // A successful humongous object allocation changes the used space |
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816 // information of the old generation so we need to recalculate the |
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817 // sizes and update the jstat counters here. |
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818 g1mm()->update_sizes(); |
2152 | 819 } |
820 | |
821 verify_region_sets_optional(); | |
2361 | 822 |
823 return result; | |
342 | 824 } |
825 | |
1973 | 826 HeapWord* G1CollectedHeap::allocate_new_tlab(size_t word_size) { |
827 assert_heap_not_locked_and_not_at_safepoint(); | |
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828 assert(!isHumongous(word_size), "we do not allow humongous TLABs"); |
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829 |
22936 | 830 uint dummy_gc_count_before; |
831 uint dummy_gclocker_retry_count = 0; | |
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832 return attempt_allocation(word_size, &dummy_gc_count_before, &dummy_gclocker_retry_count); |
342 | 833 } |
834 | |
835 HeapWord* | |
836 G1CollectedHeap::mem_allocate(size_t word_size, | |
1973 | 837 bool* gc_overhead_limit_was_exceeded) { |
838 assert_heap_not_locked_and_not_at_safepoint(); | |
342 | 839 |
10405 | 840 // Loop until the allocation is satisfied, or unsatisfied after GC. |
22936 | 841 for (uint try_count = 1, gclocker_retry_count = 0; /* we'll return */; try_count += 1) { |
842 uint gc_count_before; | |
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843 |
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844 HeapWord* result = NULL; |
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845 if (!isHumongous(word_size)) { |
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846 result = attempt_allocation(word_size, &gc_count_before, &gclocker_retry_count); |
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847 } else { |
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848 result = attempt_allocation_humongous(word_size, &gc_count_before, &gclocker_retry_count); |
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849 } |
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850 if (result != NULL) { |
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851 return result; |
342 | 852 } |
853 | |
854 // Create the garbage collection operation... | |
1973 | 855 VM_G1CollectForAllocation op(gc_count_before, word_size); |
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856 op.set_allocation_context(AllocationContext::current()); |
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857 |
342 | 858 // ...and get the VM thread to execute it. |
859 VMThread::execute(&op); | |
1973 | 860 |
861 if (op.prologue_succeeded() && op.pause_succeeded()) { | |
862 // If the operation was successful we'll return the result even | |
863 // if it is NULL. If the allocation attempt failed immediately | |
864 // after a Full GC, it's unlikely we'll be able to allocate now. | |
865 HeapWord* result = op.result(); | |
866 if (result != NULL && !isHumongous(word_size)) { | |
867 // Allocations that take place on VM operations do not do any | |
868 // card dirtying and we have to do it here. We only have to do | |
869 // this for non-humongous allocations, though. | |
870 dirty_young_block(result, word_size); | |
871 } | |
342 | 872 return result; |
1973 | 873 } else { |
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874 if (gclocker_retry_count > GCLockerRetryAllocationCount) { |
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875 return NULL; |
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876 } |
1973 | 877 assert(op.result() == NULL, |
878 "the result should be NULL if the VM op did not succeed"); | |
342 | 879 } |
880 | |
881 // Give a warning if we seem to be looping forever. | |
882 if ((QueuedAllocationWarningCount > 0) && | |
883 (try_count % QueuedAllocationWarningCount == 0)) { | |
1973 | 884 warning("G1CollectedHeap::mem_allocate retries %d times", try_count); |
342 | 885 } |
886 } | |
1973 | 887 |
888 ShouldNotReachHere(); | |
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889 return NULL; |
342 | 890 } |
891 | |
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892 HeapWord* G1CollectedHeap::attempt_allocation_slow(size_t word_size, |
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893 AllocationContext_t context, |
22936 | 894 uint* gc_count_before_ret, |
895 uint* gclocker_retry_count_ret) { | |
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896 // Make sure you read the note in attempt_allocation_humongous(). |
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897 |
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898 assert_heap_not_locked_and_not_at_safepoint(); |
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899 assert(!isHumongous(word_size), "attempt_allocation_slow() should not " |
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900 "be called for humongous allocation requests"); |
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901 |
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902 // We should only get here after the first-level allocation attempt |
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903 // (attempt_allocation()) failed to allocate. |
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904 |
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905 // We will loop until a) we manage to successfully perform the |
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906 // allocation or b) we successfully schedule a collection which |
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|
907 // fails to perform the allocation. b) is the only case when we'll |
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|
908 // return NULL. |
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|
909 HeapWord* result = NULL; |
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|
910 for (int try_count = 1; /* we'll return */; try_count += 1) { |
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|
911 bool should_try_gc; |
22936 | 912 uint gc_count_before; |
2433
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|
913 |
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|
914 { |
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|
915 MutexLockerEx x(Heap_lock); |
20404
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8057536: Refactor G1 to allow context specific allocations
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|
916 result = _allocator->mutator_alloc_region(context)->attempt_allocation_locked(word_size, |
227a9e5e4b4a
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|
917 false /* bot_updates */); |
2433
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918 if (result != NULL) { |
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|
919 return result; |
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|
920 } |
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|
921 |
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|
922 // If we reach here, attempt_allocation_locked() above failed to |
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923 // allocate a new region. So the mutator alloc region should be NULL. |
20404
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|
924 assert(_allocator->mutator_alloc_region(context)->get() == NULL, "only way to get here"); |
2433
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|
925 |
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926 if (GC_locker::is_active_and_needs_gc()) { |
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927 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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|
928 // No need for an ergo verbose message here, |
20213c8a3c40
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929 // can_expand_young_list() does this when it returns true. |
20404
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930 result = _allocator->mutator_alloc_region(context)->attempt_allocation_force(word_size, |
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931 false /* bot_updates */); |
2433
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932 if (result != NULL) { |
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|
933 return result; |
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|
934 } |
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|
935 } |
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|
936 should_try_gc = false; |
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|
937 } else { |
6106
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7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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938 // The GCLocker may not be active but the GCLocker initiated |
1d478c993020
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|
939 // GC may not yet have been performed (GCLocker::needs_gc() |
1d478c993020
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|
940 // returns true). In this case we do not try this GC and |
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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|
941 // wait until the GCLocker initiated GC is performed, and |
1d478c993020
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|
942 // then retry the allocation. |
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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|
943 if (GC_locker::needs_gc()) { |
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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|
944 should_try_gc = false; |
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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|
945 } else { |
1d478c993020
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|
946 // Read the GC count while still holding the Heap_lock. |
1d478c993020
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|
947 gc_count_before = total_collections(); |
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|
948 should_try_gc = true; |
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
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|
949 } |
2433
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|
950 } |
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|
951 } |
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|
952 |
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|
953 if (should_try_gc) { |
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|
954 bool succeeded; |
12113
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
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|
955 result = do_collection_pause(word_size, gc_count_before, &succeeded, |
22936 | 956 GCCause::_g1_inc_collection_pause); |
2433
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957 if (result != NULL) { |
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|
958 assert(succeeded, "only way to get back a non-NULL result"); |
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|
959 return result; |
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|
960 } |
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|
961 |
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diff
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|
962 if (succeeded) { |
abdfc822206f
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|
963 // If we get here we successfully scheduled a collection which |
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|
964 // failed to allocate. No point in trying to allocate |
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|
965 // further. We'll just return NULL. |
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|
966 MutexLockerEx x(Heap_lock); |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
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|
967 *gc_count_before_ret = total_collections(); |
2433
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|
968 return NULL; |
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diff
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|
969 } |
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|
970 } else { |
8853
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
parents:
8038
diff
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|
971 if (*gclocker_retry_count_ret > GCLockerRetryAllocationCount) { |
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
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|
972 MutexLockerEx x(Heap_lock); |
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
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|
973 *gc_count_before_ret = total_collections(); |
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
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|
974 return NULL; |
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
mgerdin
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|
975 } |
6106
1d478c993020
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|
976 // The GCLocker is either active or the GCLocker initiated |
1d478c993020
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johnc
parents:
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diff
changeset
|
977 // GC has not yet been performed. Stall until it is and |
1d478c993020
7143858: G1: Back to back young GCs with the second GC having a minimally sized eden
johnc
parents:
6064
diff
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|
978 // then retry the allocation. |
2433
abdfc822206f
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|
979 GC_locker::stall_until_clear(); |
8853
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7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
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|
980 (*gclocker_retry_count_ret) += 1; |
2433
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7023069: G1: Introduce symmetric locking in the slow allocation path
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|
981 } |
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diff
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|
982 |
10405 | 983 // We can reach here if we were unsuccessful in scheduling a |
2433
abdfc822206f
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tonyp
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diff
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|
984 // collection (because another thread beat us to it) or if we were |
abdfc822206f
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tonyp
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diff
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|
985 // stalled due to the GC locker. In either can we should retry the |
abdfc822206f
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diff
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|
986 // allocation attempt in case another thread successfully |
abdfc822206f
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diff
changeset
|
987 // performed a collection and reclaimed enough space. We do the |
abdfc822206f
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parents:
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diff
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|
988 // first attempt (without holding the Heap_lock) here and the |
abdfc822206f
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diff
changeset
|
989 // follow-on attempt will be at the start of the next loop |
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diff
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|
990 // iteration (after taking the Heap_lock). |
20404
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8057536: Refactor G1 to allow context specific allocations
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parents:
20377
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|
991 result = _allocator->mutator_alloc_region(context)->attempt_allocation(word_size, |
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
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|
992 false /* bot_updates */); |
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
993 if (result != NULL) { |
2433
abdfc822206f
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parents:
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diff
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|
994 return result; |
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diff
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|
995 } |
abdfc822206f
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parents:
2432
diff
changeset
|
996 |
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diff
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|
997 // Give a warning if we seem to be looping forever. |
abdfc822206f
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|
998 if ((QueuedAllocationWarningCount > 0) && |
abdfc822206f
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diff
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|
999 (try_count % QueuedAllocationWarningCount == 0)) { |
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|
1000 warning("G1CollectedHeap::attempt_allocation_slow() " |
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diff
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|
1001 "retries %d times", try_count); |
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diff
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|
1002 } |
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diff
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|
1003 } |
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parents:
2432
diff
changeset
|
1004 |
abdfc822206f
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diff
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|
1005 ShouldNotReachHere(); |
abdfc822206f
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diff
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|
1006 return NULL; |
abdfc822206f
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parents:
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diff
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|
1007 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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diff
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|
1008 |
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|
1009 HeapWord* G1CollectedHeap::attempt_allocation_humongous(size_t word_size, |
22936 | 1010 uint* gc_count_before_ret, |
1011 uint* gclocker_retry_count_ret) { | |
2433
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1012 // The structure of this method has a lot of similarities to |
abdfc822206f
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|
1013 // attempt_allocation_slow(). The reason these two were not merged |
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diff
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|
1014 // into a single one is that such a method would require several "if |
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|
1015 // allocation is not humongous do this, otherwise do that" |
abdfc822206f
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1016 // conditional paths which would obscure its flow. In fact, an early |
abdfc822206f
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|
1017 // version of this code did use a unified method which was harder to |
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|
1018 // follow and, as a result, it had subtle bugs that were hard to |
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|
1019 // track down. So keeping these two methods separate allows each to |
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|
1020 // be more readable. It will be good to keep these two in sync as |
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diff
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|
1021 // much as possible. |
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|
1022 |
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diff
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|
1023 assert_heap_not_locked_and_not_at_safepoint(); |
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|
1024 assert(isHumongous(word_size), "attempt_allocation_humongous() " |
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|
1025 "should only be called for humongous allocations"); |
abdfc822206f
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|
1026 |
4834
6a78aa6ac1ff
7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
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parents:
4833
diff
changeset
|
1027 // Humongous objects can exhaust the heap quickly, so we should check if we |
6a78aa6ac1ff
7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
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4833
diff
changeset
|
1028 // need to start a marking cycle at each humongous object allocation. We do |
6a78aa6ac1ff
7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
brutisso
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4833
diff
changeset
|
1029 // the check before we do the actual allocation. The reason for doing it |
6a78aa6ac1ff
7132311: G1: assert((s == klass->oop_size(this)) || (Universe::heap()->is_gc_active() && ((is_typeArray()...
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parents:
4833
diff
changeset
|
1030 // before the allocation is that we avoid having to keep track of the newly |
6a78aa6ac1ff
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1031 // allocated memory while we do a GC. |
4910
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1032 if (g1_policy()->need_to_start_conc_mark("concurrent humongous allocation", |
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|
1033 word_size)) { |
4834
6a78aa6ac1ff
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|
1034 collect(GCCause::_g1_humongous_allocation); |
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|
1035 } |
6a78aa6ac1ff
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|
1036 |
2433
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1037 // We will loop until a) we manage to successfully perform the |
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1038 // allocation or b) we successfully schedule a collection which |
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1039 // fails to perform the allocation. b) is the only case when we'll |
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1040 // return NULL. |
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1041 HeapWord* result = NULL; |
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1042 for (int try_count = 1; /* we'll return */; try_count += 1) { |
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1043 bool should_try_gc; |
22936 | 1044 uint gc_count_before; |
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1045 |
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1046 { |
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1047 MutexLockerEx x(Heap_lock); |
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1048 |
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1049 // Given that humongous objects are not allocated in young |
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1050 // regions, we'll first try to do the allocation without doing a |
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1051 // collection hoping that there's enough space in the heap. |
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1052 result = humongous_obj_allocate(word_size, AllocationContext::current()); |
2433
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1053 if (result != NULL) { |
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1054 return result; |
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1055 } |
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1056 |
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1057 if (GC_locker::is_active_and_needs_gc()) { |
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1058 should_try_gc = false; |
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1059 } else { |
6106
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1060 // The GCLocker may not be active but the GCLocker initiated |
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1061 // GC may not yet have been performed (GCLocker::needs_gc() |
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1062 // returns true). In this case we do not try this GC and |
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1063 // wait until the GCLocker initiated GC is performed, and |
1d478c993020
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1064 // then retry the allocation. |
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1065 if (GC_locker::needs_gc()) { |
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1066 should_try_gc = false; |
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1067 } else { |
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1068 // Read the GC count while still holding the Heap_lock. |
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1069 gc_count_before = total_collections(); |
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1070 should_try_gc = true; |
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1071 } |
2433
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1072 } |
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1073 } |
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|
1074 |
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1075 if (should_try_gc) { |
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1076 // If we failed to allocate the humongous object, we should try to |
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1077 // do a collection pause (if we're allowed) in case it reclaims |
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1078 // enough space for the allocation to succeed after the pause. |
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|
1079 |
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|
1080 bool succeeded; |
12113
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8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
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|
1081 result = do_collection_pause(word_size, gc_count_before, &succeeded, |
22936 | 1082 GCCause::_g1_humongous_allocation); |
2433
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1083 if (result != NULL) { |
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1084 assert(succeeded, "only way to get back a non-NULL result"); |
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|
1085 return result; |
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|
1086 } |
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|
1087 |
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|
1088 if (succeeded) { |
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|
1089 // If we get here we successfully scheduled a collection which |
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1090 // failed to allocate. No point in trying to allocate |
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|
1091 // further. We'll just return NULL. |
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|
1092 MutexLockerEx x(Heap_lock); |
4910
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1093 *gc_count_before_ret = total_collections(); |
2433
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|
1094 return NULL; |
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|
1095 } |
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|
1096 } else { |
8853
2e093b564241
7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine
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|
1097 if (*gclocker_retry_count_ret > GCLockerRetryAllocationCount) { |
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1098 MutexLockerEx x(Heap_lock); |
2e093b564241
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1099 *gc_count_before_ret = total_collections(); |
2e093b564241
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|
1100 return NULL; |
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|
1101 } |
6106
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1102 // The GCLocker is either active or the GCLocker initiated |
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1103 // GC has not yet been performed. Stall until it is and |
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|
1104 // then retry the allocation. |
2433
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1105 GC_locker::stall_until_clear(); |
8853
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1106 (*gclocker_retry_count_ret) += 1; |
2433
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1107 } |
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|
1108 |
10405 | 1109 // We can reach here if we were unsuccessful in scheduling a |
2433
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1110 // collection (because another thread beat us to it) or if we were |
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1111 // stalled due to the GC locker. In either can we should retry the |
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1112 // allocation attempt in case another thread successfully |
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1113 // performed a collection and reclaimed enough space. Give a |
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1114 // warning if we seem to be looping forever. |
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1115 |
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1116 if ((QueuedAllocationWarningCount > 0) && |
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1117 (try_count % QueuedAllocationWarningCount == 0)) { |
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1118 warning("G1CollectedHeap::attempt_allocation_humongous() " |
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1119 "retries %d times", try_count); |
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1120 } |
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1121 } |
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1122 |
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1123 ShouldNotReachHere(); |
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1124 return NULL; |
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1125 } |
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1126 |
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1127 HeapWord* G1CollectedHeap::attempt_allocation_at_safepoint(size_t word_size, |
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1128 AllocationContext_t context, |
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|
1129 bool expect_null_mutator_alloc_region) { |
2152 | 1130 assert_at_safepoint(true /* should_be_vm_thread */); |
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1131 assert(_allocator->mutator_alloc_region(context)->get() == NULL || |
2433
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|
1132 !expect_null_mutator_alloc_region, |
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1133 "the current alloc region was unexpectedly found to be non-NULL"); |
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1134 |
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1135 if (!isHumongous(word_size)) { |
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|
1136 return _allocator->mutator_alloc_region(context)->attempt_allocation_locked(word_size, |
2433
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1137 false /* bot_updates */); |
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1138 } else { |
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|
1139 HeapWord* result = humongous_obj_allocate(word_size, context); |
4829
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1140 if (result != NULL && g1_policy()->need_to_start_conc_mark("STW humongous allocation")) { |
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1141 g1_policy()->set_initiate_conc_mark_if_possible(); |
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1142 } |
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1143 return result; |
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1144 } |
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1145 |
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1146 ShouldNotReachHere(); |
342 | 1147 } |
1148 | |
1149 class PostMCRemSetClearClosure: public HeapRegionClosure { | |
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1150 G1CollectedHeap* _g1h; |
342 | 1151 ModRefBarrierSet* _mr_bs; |
1152 public: | |
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1153 PostMCRemSetClearClosure(G1CollectedHeap* g1h, ModRefBarrierSet* mr_bs) : |
12080 | 1154 _g1h(g1h), _mr_bs(mr_bs) {} |
1155 | |
342 | 1156 bool doHeapRegion(HeapRegion* r) { |
12080 | 1157 HeapRegionRemSet* hrrs = r->rem_set(); |
1158 | |
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1159 if (r->continuesHumongous()) { |
12080 | 1160 // We'll assert that the strong code root list and RSet is empty |
1161 assert(hrrs->strong_code_roots_list_length() == 0, "sanity"); | |
1162 assert(hrrs->occupied() == 0, "RSet should be empty"); | |
342 | 1163 return false; |
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1164 } |
12080 | 1165 |
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1166 _g1h->reset_gc_time_stamps(r); |
12080 | 1167 hrrs->clear(); |
342 | 1168 // You might think here that we could clear just the cards |
1169 // corresponding to the used region. But no: if we leave a dirty card | |
1170 // in a region we might allocate into, then it would prevent that card | |
1171 // from being enqueued, and cause it to be missed. | |
1172 // Re: the performance cost: we shouldn't be doing full GC anyway! | |
1173 _mr_bs->clear(MemRegion(r->bottom(), r->end())); | |
12080 | 1174 |
342 | 1175 return false; |
1176 } | |
1177 }; | |
1178 | |
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1179 void G1CollectedHeap::clear_rsets_post_compaction() { |
12343 | 1180 PostMCRemSetClearClosure rs_clear(this, g1_barrier_set()); |
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1181 heap_region_iterate(&rs_clear); |
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1182 } |
342 | 1183 |
626
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1184 class RebuildRSOutOfRegionClosure: public HeapRegionClosure { |
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1185 G1CollectedHeap* _g1h; |
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1186 UpdateRSOopClosure _cl; |
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1187 int _worker_i; |
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1188 public: |
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1189 RebuildRSOutOfRegionClosure(G1CollectedHeap* g1, int worker_i = 0) : |
1861 | 1190 _cl(g1->g1_rem_set(), worker_i), |
626
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1191 _worker_i(worker_i), |
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1192 _g1h(g1) |
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1193 { } |
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1194 |
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1195 bool doHeapRegion(HeapRegion* r) { |
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1196 if (!r->continuesHumongous()) { |
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1197 _cl.set_from(r); |
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1198 r->oop_iterate(&_cl); |
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1199 } |
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1200 return false; |
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1201 } |
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1202 }; |
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1203 |
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1204 class ParRebuildRSTask: public AbstractGangTask { |
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1205 G1CollectedHeap* _g1; |
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1206 public: |
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1207 ParRebuildRSTask(G1CollectedHeap* g1) |
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1208 : AbstractGangTask("ParRebuildRSTask"), |
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1209 _g1(g1) |
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1210 { } |
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1211 |
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1212 void work(uint worker_id) { |
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1213 RebuildRSOutOfRegionClosure rebuild_rs(_g1, worker_id); |
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1214 _g1->heap_region_par_iterate_chunked(&rebuild_rs, worker_id, |
4095
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1215 _g1->workers()->active_workers(), |
626
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1216 HeapRegion::RebuildRSClaimValue); |
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1217 } |
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1218 }; |
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1219 |
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1220 class PostCompactionPrinterClosure: public HeapRegionClosure { |
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1221 private: |
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1222 G1HRPrinter* _hr_printer; |
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1223 public: |
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1224 bool doHeapRegion(HeapRegion* hr) { |
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1225 assert(!hr->is_young(), "not expecting to find young regions"); |
20481
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1226 if (hr->is_free()) { |
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1227 // We only generate output for non-empty regions. |
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1228 } else if (hr->startsHumongous()) { |
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1229 if (hr->region_num() == 1) { |
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1230 // single humongous region |
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1231 _hr_printer->post_compaction(hr, G1HRPrinter::SingleHumongous); |
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1232 } else { |
20481
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1233 _hr_printer->post_compaction(hr, G1HRPrinter::StartsHumongous); |
3778
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1234 } |
20481
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1235 } else if (hr->continuesHumongous()) { |
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1236 _hr_printer->post_compaction(hr, G1HRPrinter::ContinuesHumongous); |
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1237 } else if (hr->is_old()) { |
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1238 _hr_printer->post_compaction(hr, G1HRPrinter::Old); |
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1239 } else { |
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1240 ShouldNotReachHere(); |
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1241 } |
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1242 return false; |
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1243 } |
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1244 |
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1245 PostCompactionPrinterClosure(G1HRPrinter* hr_printer) |
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1246 : _hr_printer(hr_printer) { } |
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1247 }; |
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1248 |
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1249 void G1CollectedHeap::print_hrm_post_compaction() { |
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1250 PostCompactionPrinterClosure cl(hr_printer()); |
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1251 heap_region_iterate(&cl); |
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1252 } |
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1253 |
1973 | 1254 bool G1CollectedHeap::do_collection(bool explicit_gc, |
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1255 bool clear_all_soft_refs, |
342 | 1256 size_t word_size) { |
2152 | 1257 assert_at_safepoint(true /* should_be_vm_thread */); |
1258 | |
1359
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1259 if (GC_locker::check_active_before_gc()) { |
1973 | 1260 return false; |
1359
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1261 } |
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1262 |
10405 | 1263 STWGCTimer* gc_timer = G1MarkSweep::gc_timer(); |
13400
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1264 gc_timer->register_gc_start(); |
10405 | 1265 |
1266 SerialOldTracer* gc_tracer = G1MarkSweep::gc_tracer(); | |
1267 gc_tracer->report_gc_start(gc_cause(), gc_timer->gc_start()); | |
1268 | |
2125
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1269 SvcGCMarker sgcm(SvcGCMarker::FULL); |
342 | 1270 ResourceMark rm; |
1271 | |
4872
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1272 print_heap_before_gc(); |
10405 | 1273 trace_heap_before_gc(gc_tracer); |
838
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1274 |
17866
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1275 size_t metadata_prev_used = MetaspaceAux::used_bytes(); |
6725
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1276 |
2152 | 1277 verify_region_sets_optional(); |
342 | 1278 |
1387
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1279 const bool do_clear_all_soft_refs = clear_all_soft_refs || |
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1280 collector_policy()->should_clear_all_soft_refs(); |
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1281 |
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1282 ClearedAllSoftRefs casr(do_clear_all_soft_refs, collector_policy()); |
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1283 |
342 | 1284 { |
1285 IsGCActiveMark x; | |
1286 | |
1287 // Timing | |
6030 | 1288 assert(gc_cause() != GCCause::_java_lang_system_gc || explicit_gc, "invariant"); |
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1289 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
6030 | 1290 |
342 | 1291 { |
20190
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1292 GCTraceTime t(GCCauseString("Full GC", gc_cause()), G1Log::fine(), true, NULL, gc_tracer->gc_id()); |
10098
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1293 TraceCollectorStats tcs(g1mm()->full_collection_counters()); |
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1294 TraceMemoryManagerStats tms(true /* fullGC */, gc_cause()); |
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1295 |
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1296 double start = os::elapsedTime(); |
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1297 g1_policy()->record_full_collection_start(); |
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1298 |
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1299 // Note: When we have a more flexible GC logging framework that |
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1300 // allows us to add optional attributes to a GC log record we |
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1301 // could consider timing and reporting how long we wait in the |
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1302 // following two methods. |
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1303 wait_while_free_regions_coming(); |
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1304 // If we start the compaction before the CM threads finish |
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1305 // scanning the root regions we might trip them over as we'll |
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1306 // be moving objects / updating references. So let's wait until |
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1307 // they are done. By telling them to abort, they should complete |
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1308 // early. |
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1309 _cm->root_regions()->abort(); |
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1310 _cm->root_regions()->wait_until_scan_finished(); |
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1311 append_secondary_free_list_if_not_empty_with_lock(); |
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1312 |
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1313 gc_prologue(true); |
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1314 increment_total_collections(true /* full gc */); |
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1315 increment_old_marking_cycles_started(); |
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1316 |
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|
1317 assert(used() == recalculate_used(), "Should be equal"); |
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1318 |
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|
1319 verify_before_gc(); |
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|
1320 |
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
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|
1321 check_bitmaps("Full GC Start"); |
10405 | 1322 pre_full_gc_dump(gc_timer); |
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1323 |
22298 | 1324 #if defined(COMPILER2) || INCLUDE_JVMCI |
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1325 DerivedPointerTable::clear(); |
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1326 #endif |
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|
1327 |
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|
1328 // Disable discovery and empty the discovered lists |
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|
1329 // for the CM ref processor. |
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|
1330 ref_processor_cm()->disable_discovery(); |
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|
1331 ref_processor_cm()->abandon_partial_discovery(); |
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|
1332 ref_processor_cm()->verify_no_references_recorded(); |
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|
1333 |
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|
1334 // Abandon current iterations of concurrent marking and concurrent |
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|
1335 // refinement, if any are in progress. We have to do this before |
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|
1336 // wait_until_scan_finished() below. |
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|
1337 concurrent_mark()->abort(); |
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|
1338 |
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|
1339 // Make sure we'll choose a new allocation region afterwards. |
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
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|
1340 _allocator->release_mutator_alloc_region(); |
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|
1341 _allocator->abandon_gc_alloc_regions(); |
10098
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1342 g1_rem_set()->cleanupHRRS(); |
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|
1343 |
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|
1344 // We should call this after we retire any currently active alloc |
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1345 // regions so that all the ALLOC / RETIRE events are generated |
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1346 // before the start GC event. |
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|
1347 _hr_printer.start_gc(true /* full */, (size_t) total_collections()); |
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|
1348 |
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1349 // We may have added regions to the current incremental collection |
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1350 // set between the last GC or pause and now. We need to clear the |
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|
1351 // incremental collection set and then start rebuilding it afresh |
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|
1352 // after this full GC. |
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|
1353 abandon_collection_set(g1_policy()->inc_cset_head()); |
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|
1354 g1_policy()->clear_incremental_cset(); |
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|
1355 g1_policy()->stop_incremental_cset_building(); |
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|
1356 |
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|
1357 tear_down_region_sets(false /* free_list_only */); |
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|
1358 g1_policy()->set_gcs_are_young(true); |
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|
1359 |
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|
1360 // See the comments in g1CollectedHeap.hpp and |
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|
1361 // G1CollectedHeap::ref_processing_init() about |
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|
1362 // how reference processing currently works in G1. |
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|
1363 |
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|
1364 // Temporarily make discovery by the STW ref processor single threaded (non-MT). |
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|
1365 ReferenceProcessorMTDiscoveryMutator stw_rp_disc_ser(ref_processor_stw(), false); |
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|
1366 |
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|
1367 // Temporarily clear the STW ref processor's _is_alive_non_header field. |
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|
1368 ReferenceProcessorIsAliveMutator stw_rp_is_alive_null(ref_processor_stw(), NULL); |
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|
1369 |
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|
1370 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, true /*verify_no_refs*/); |
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|
1371 ref_processor_stw()->setup_policy(do_clear_all_soft_refs); |
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|
1372 |
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changeset
|
1373 // Do collection work |
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|
1374 { |
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|
1375 HandleMark hm; // Discard invalid handles created during gc |
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|
1376 G1MarkSweep::invoke_at_safepoint(ref_processor_stw(), do_clear_all_soft_refs); |
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|
1377 } |
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changeset
|
1378 |
20336
6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
20335
diff
changeset
|
1379 assert(num_free_regions() == 0, "we should not have added any free regions"); |
10098
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|
1380 rebuild_region_sets(false /* free_list_only */); |
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|
1381 |
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|
1382 // Enqueue any discovered reference objects that have |
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|
1383 // not been removed from the discovered lists. |
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|
1384 ref_processor_stw()->enqueue_discovered_references(); |
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|
1385 |
22298 | 1386 #if defined(COMPILER2) || INCLUDE_JVMCI |
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|
1387 DerivedPointerTable::update_pointers(); |
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|
1388 #endif |
10098
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|
1389 |
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|
1390 MemoryService::track_memory_usage(); |
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|
1391 |
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|
1392 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
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|
1393 ref_processor_stw()->verify_no_references_recorded(); |
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|
1394 |
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|
1395 // Delete metaspaces for unloaded class loaders and clean up loader_data graph |
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|
1396 ClassLoaderDataGraph::purge(); |
12080 | 1397 MetaspaceAux::verify_metrics(); |
10098
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|
1398 |
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|
1399 // Note: since we've just done a full GC, concurrent |
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1400 // marking is no longer active. Therefore we need not |
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|
1401 // re-enable reference discovery for the CM ref processor. |
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|
1402 // That will be done at the start of the next marking cycle. |
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|
1403 assert(!ref_processor_cm()->discovery_enabled(), "Postcondition"); |
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|
1404 ref_processor_cm()->verify_no_references_recorded(); |
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|
1405 |
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|
1406 reset_gc_time_stamp(); |
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|
1407 // Since everything potentially moved, we will clear all remembered |
10405 | 1408 // sets, and clear all cards. Later we will rebuild remembered |
10098
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1409 // sets. We will also reset the GC time stamps of the regions. |
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|
1410 clear_rsets_post_compaction(); |
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|
1411 check_gc_time_stamps(); |
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|
1412 |
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|
1413 // Resize the heap if necessary. |
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|
1414 resize_if_necessary_after_full_collection(explicit_gc ? 0 : word_size); |
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|
1415 |
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|
1416 if (_hr_printer.is_active()) { |
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|
1417 // We should do this after we potentially resize the heap so |
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1418 // that all the COMMIT / UNCOMMIT events are generated before |
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|
1419 // the end GC event. |
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|
1420 |
20377
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|
1421 print_hrm_post_compaction(); |
10098
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|
1422 _hr_printer.end_gc(true /* full */, (size_t) total_collections()); |
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|
1423 } |
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|
1424 |
10246
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|
1425 G1HotCardCache* hot_card_cache = _cg1r->hot_card_cache(); |
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|
1426 if (hot_card_cache->use_cache()) { |
194f52aa2f23
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|
1427 hot_card_cache->reset_card_counts(); |
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|
1428 hot_card_cache->reset_hot_cache(); |
10098
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|
1429 } |
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|
1430 |
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|
1431 // Rebuild remembered sets of all regions. |
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|
1432 if (G1CollectedHeap::use_parallel_gc_threads()) { |
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|
1433 uint n_workers = |
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|
1434 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
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|
1435 workers()->active_workers(), |
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|
1436 Threads::number_of_non_daemon_threads()); |
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|
1437 assert(UseDynamicNumberOfGCThreads || |
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|
1438 n_workers == workers()->total_workers(), |
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|
1439 "If not dynamic should be using all the workers"); |
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|
1440 workers()->set_active_workers(n_workers); |
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|
1441 // Set parallel threads in the heap (_n_par_threads) only |
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|
1442 // before a parallel phase and always reset it to 0 after |
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1443 // the phase so that the number of parallel threads does |
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1444 // no get carried forward to a serial phase where there |
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1445 // may be code that is "possibly_parallel". |
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|
1446 set_par_threads(n_workers); |
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|
1447 |
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|
1448 ParRebuildRSTask rebuild_rs_task(this); |
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|
1449 assert(check_heap_region_claim_values( |
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|
1450 HeapRegion::InitialClaimValue), "sanity check"); |
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|
1451 assert(UseDynamicNumberOfGCThreads || |
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|
1452 workers()->active_workers() == workers()->total_workers(), |
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|
1453 "Unless dynamic should use total workers"); |
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|
1454 // Use the most recent number of active workers |
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1455 assert(workers()->active_workers() > 0, |
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|
1456 "Active workers not properly set"); |
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|
1457 set_par_threads(workers()->active_workers()); |
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|
1458 workers()->run_task(&rebuild_rs_task); |
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|
1459 set_par_threads(0); |
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|
1460 assert(check_heap_region_claim_values( |
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|
1461 HeapRegion::RebuildRSClaimValue), "sanity check"); |
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|
1462 reset_heap_region_claim_values(); |
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|
1463 } else { |
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|
1464 RebuildRSOutOfRegionClosure rebuild_rs(this); |
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|
1465 heap_region_iterate(&rebuild_rs); |
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|
1466 } |
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|
1467 |
12080 | 1468 // Rebuild the strong code root lists for each region |
1469 rebuild_strong_code_roots(); | |
1470 | |
10098
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1471 if (true) { // FIXME |
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|
1472 MetaspaceGC::compute_new_size(); |
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|
1473 } |
342 | 1474 |
546
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6690928: Use spinning in combination with yields for workstealing termination.
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|
1475 #ifdef TRACESPINNING |
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1476 ParallelTaskTerminator::print_termination_counts(); |
546
05c6d52fa7a9
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|
1477 #endif |
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|
1478 |
10098
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|
1479 // Discard all rset updates |
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|
1480 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
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|
1481 assert(dirty_card_queue_set().completed_buffers_num() == 0, "DCQS should be empty"); |
10098
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|
1482 |
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|
1483 _young_list->reset_sampled_info(); |
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|
1484 // At this point there should be no regions in the |
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|
1485 // entire heap tagged as young. |
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|
1486 assert(check_young_list_empty(true /* check_heap */), |
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|
1487 "young list should be empty at this point"); |
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|
1488 |
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|
1489 // Update the number of full collections that have been completed. |
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|
1490 increment_old_marking_cycles_completed(false /* concurrent */); |
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|
1491 |
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
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|
1492 _hrm.verify_optional(); |
10098
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|
1493 verify_region_sets_optional(); |
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|
1494 |
10373
3a4805ad0005
8015244: G1: Verification after a full GC is incorrectly placed.
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|
1495 verify_after_gc(); |
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|
1496 |
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|
1497 // Clear the previous marking bitmap, if needed for bitmap verification. |
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|
1498 // Note we cannot do this when we clear the next marking bitmap in |
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|
1499 // ConcurrentMark::abort() above since VerifyDuringGC verifies the |
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|
1500 // objects marked during a full GC against the previous bitmap. |
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1501 // But we need to clear it before calling check_bitmaps below since |
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|
1502 // the full GC has compacted objects and updated TAMS but not updated |
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|
1503 // the prev bitmap. |
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|
1504 if (G1VerifyBitmaps) { |
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|
1505 ((CMBitMap*) concurrent_mark()->prevMarkBitMap())->clearAll(); |
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|
1506 } |
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|
1507 check_bitmaps("Full GC End"); |
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|
1508 |
10098
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1509 // Start a new incremental collection set for the next pause |
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1510 assert(g1_policy()->collection_set() == NULL, "must be"); |
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|
1511 g1_policy()->start_incremental_cset_building(); |
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|
1512 |
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|
1513 clear_cset_fast_test(); |
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|
1514 |
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
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20377
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|
1515 _allocator->init_mutator_alloc_region(); |
10098
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|
1516 |
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|
1517 double end = os::elapsedTime(); |
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|
1518 g1_policy()->record_full_collection_end(); |
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|
1519 |
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|
1520 if (G1Log::fine()) { |
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|
1521 g1_policy()->print_heap_transition(); |
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|
1522 } |
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|
1523 |
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|
1524 // We must call G1MonitoringSupport::update_sizes() in the same scoping level |
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|
1525 // as an active TraceMemoryManagerStats object (i.e. before the destructor for the |
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|
1526 // TraceMemoryManagerStats is called) so that the G1 memory pools are updated |
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|
1527 // before any GC notifications are raised. |
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|
1528 g1mm()->update_sizes(); |
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|
1529 |
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|
1530 gc_epilogue(true); |
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|
1531 } |
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|
1532 |
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|
1533 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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|
1534 g1_policy()->print_detailed_heap_transition(true /* full */); |
10098
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|
1535 } |
6121
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
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6120
diff
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|
1536 |
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|
1537 print_heap_after_gc(); |
10405 | 1538 trace_heap_after_gc(gc_tracer); |
1539 | |
1540 post_full_gc_dump(gc_timer); | |
1541 | |
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
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diff
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|
1542 gc_timer->register_gc_end(); |
10405 | 1543 gc_tracer->report_gc_end(gc_timer->gc_end(), gc_timer->time_partitions()); |
10098
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|
1544 } |
1973 | 1545 |
1546 return true; | |
342 | 1547 } |
1548 | |
1549 void G1CollectedHeap::do_full_collection(bool clear_all_soft_refs) { | |
1973 | 1550 // do_collection() will return whether it succeeded in performing |
1551 // the GC. Currently, there is no facility on the | |
1552 // do_full_collection() API to notify the caller than the collection | |
1553 // did not succeed (e.g., because it was locked out by the GC | |
1554 // locker). So, right now, we'll ignore the return value. | |
1555 bool dummy = do_collection(true, /* explicit_gc */ | |
1556 clear_all_soft_refs, | |
1557 0 /* word_size */); | |
342 | 1558 } |
1559 | |
1560 // This code is mostly copied from TenuredGeneration. | |
1561 void | |
1562 G1CollectedHeap:: | |
1563 resize_if_necessary_after_full_collection(size_t word_size) { | |
1564 // Include the current allocation, if any, and bytes that will be | |
1565 // pre-allocated to support collections, as "used". | |
1566 const size_t used_after_gc = used(); | |
1567 const size_t capacity_after_gc = capacity(); | |
1568 const size_t free_after_gc = capacity_after_gc - used_after_gc; | |
1569 | |
1717
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|
1570 // This is enforced in arguments.cpp. |
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|
1571 assert(MinHeapFreeRatio <= MaxHeapFreeRatio, |
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|
1572 "otherwise the code below doesn't make sense"); |
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|
1573 |
342 | 1574 // We don't have floating point command-line arguments |
1717
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|
1575 const double minimum_free_percentage = (double) MinHeapFreeRatio / 100.0; |
342 | 1576 const double maximum_used_percentage = 1.0 - minimum_free_percentage; |
1717
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|
1577 const double maximum_free_percentage = (double) MaxHeapFreeRatio / 100.0; |
342 | 1578 const double minimum_used_percentage = 1.0 - maximum_free_percentage; |
1579 | |
1717
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|
1580 const size_t min_heap_size = collector_policy()->min_heap_byte_size(); |
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|
1581 const size_t max_heap_size = collector_policy()->max_heap_byte_size(); |
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|
1582 |
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|
1583 // We have to be careful here as these two calculations can overflow |
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|
1584 // 32-bit size_t's. |
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|
1585 double used_after_gc_d = (double) used_after_gc; |
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|
1586 double minimum_desired_capacity_d = used_after_gc_d / maximum_used_percentage; |
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|
1587 double maximum_desired_capacity_d = used_after_gc_d / minimum_used_percentage; |
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|
1588 |
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|
1589 // Let's make sure that they are both under the max heap size, which |
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|
1590 // by default will make them fit into a size_t. |
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1591 double desired_capacity_upper_bound = (double) max_heap_size; |
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1592 minimum_desired_capacity_d = MIN2(minimum_desired_capacity_d, |
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1593 desired_capacity_upper_bound); |
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1594 maximum_desired_capacity_d = MIN2(maximum_desired_capacity_d, |
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1595 desired_capacity_upper_bound); |
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1596 |
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1597 // We can now safely turn them into size_t's. |
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1598 size_t minimum_desired_capacity = (size_t) minimum_desired_capacity_d; |
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1599 size_t maximum_desired_capacity = (size_t) maximum_desired_capacity_d; |
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1600 |
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1601 // This assert only makes sense here, before we adjust them |
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1602 // with respect to the min and max heap size. |
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1603 assert(minimum_desired_capacity <= maximum_desired_capacity, |
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1604 err_msg("minimum_desired_capacity = "SIZE_FORMAT", " |
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1605 "maximum_desired_capacity = "SIZE_FORMAT, |
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1606 minimum_desired_capacity, maximum_desired_capacity)); |
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1607 |
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1608 // Should not be greater than the heap max size. No need to adjust |
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1609 // it with respect to the heap min size as it's a lower bound (i.e., |
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1610 // we'll try to make the capacity larger than it, not smaller). |
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1611 minimum_desired_capacity = MIN2(minimum_desired_capacity, max_heap_size); |
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1612 // Should not be less than the heap min size. No need to adjust it |
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1613 // with respect to the heap max size as it's an upper bound (i.e., |
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1614 // we'll try to make the capacity smaller than it, not greater). |
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1615 maximum_desired_capacity = MAX2(maximum_desired_capacity, min_heap_size); |
342 | 1616 |
1717
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1617 if (capacity_after_gc < minimum_desired_capacity) { |
342 | 1618 // Don't expand unless it's significant |
1619 size_t expand_bytes = minimum_desired_capacity - capacity_after_gc; | |
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1620 ergo_verbose4(ErgoHeapSizing, |
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1621 "attempt heap expansion", |
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1622 ergo_format_reason("capacity lower than " |
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1623 "min desired capacity after Full GC") |
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1624 ergo_format_byte("capacity") |
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1625 ergo_format_byte("occupancy") |
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|
1626 ergo_format_byte_perc("min desired capacity"), |
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1627 capacity_after_gc, used_after_gc, |
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1628 minimum_desired_capacity, (double) MinHeapFreeRatio); |
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|
1629 expand(expand_bytes); |
342 | 1630 |
1631 // No expansion, now see if we want to shrink | |
1717
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1632 } else if (capacity_after_gc > maximum_desired_capacity) { |
342 | 1633 // Capacity too large, compute shrinking size |
1634 size_t shrink_bytes = capacity_after_gc - maximum_desired_capacity; | |
3914
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1635 ergo_verbose4(ErgoHeapSizing, |
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1636 "attempt heap shrinking", |
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|
1637 ergo_format_reason("capacity higher than " |
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|
1638 "max desired capacity after Full GC") |
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|
1639 ergo_format_byte("capacity") |
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|
1640 ergo_format_byte("occupancy") |
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|
1641 ergo_format_byte_perc("max desired capacity"), |
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1642 capacity_after_gc, used_after_gc, |
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|
1643 maximum_desired_capacity, (double) MaxHeapFreeRatio); |
342 | 1644 shrink(shrink_bytes); |
1645 } | |
1646 } | |
1647 | |
1648 | |
1649 HeapWord* | |
1973 | 1650 G1CollectedHeap::satisfy_failed_allocation(size_t word_size, |
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|
1651 AllocationContext_t context, |
1973 | 1652 bool* succeeded) { |
2152 | 1653 assert_at_safepoint(true /* should_be_vm_thread */); |
1973 | 1654 |
1655 *succeeded = true; | |
1656 // Let's attempt the allocation first. | |
2433
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|
1657 HeapWord* result = |
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|
1658 attempt_allocation_at_safepoint(word_size, |
20404
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|
1659 context, |
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|
1660 false /* expect_null_mutator_alloc_region */); |
1973 | 1661 if (result != NULL) { |
1662 assert(*succeeded, "sanity"); | |
1663 return result; | |
1664 } | |
342 | 1665 |
1666 // In a G1 heap, we're supposed to keep allocation from failing by | |
1667 // incremental pauses. Therefore, at least for now, we'll favor | |
1668 // expansion over collection. (This might change in the future if we can | |
1669 // do something smarter than full collection to satisfy a failed alloc.) | |
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|
1670 result = expand_and_allocate(word_size, context); |
342 | 1671 if (result != NULL) { |
1973 | 1672 assert(*succeeded, "sanity"); |
342 | 1673 return result; |
1674 } | |
1675 | |
1973 | 1676 // Expansion didn't work, we'll try to do a Full GC. |
1677 bool gc_succeeded = do_collection(false, /* explicit_gc */ | |
1678 false, /* clear_all_soft_refs */ | |
1679 word_size); | |
1680 if (!gc_succeeded) { | |
1681 *succeeded = false; | |
1682 return NULL; | |
1683 } | |
1684 | |
1685 // Retry the allocation | |
1686 result = attempt_allocation_at_safepoint(word_size, | |
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|
1687 context, |
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|
1688 true /* expect_null_mutator_alloc_region */); |
342 | 1689 if (result != NULL) { |
1973 | 1690 assert(*succeeded, "sanity"); |
342 | 1691 return result; |
1692 } | |
1693 | |
1973 | 1694 // Then, try a Full GC that will collect all soft references. |
1695 gc_succeeded = do_collection(false, /* explicit_gc */ | |
1696 true, /* clear_all_soft_refs */ | |
1697 word_size); | |
1698 if (!gc_succeeded) { | |
1699 *succeeded = false; | |
1700 return NULL; | |
1701 } | |
1702 | |
1703 // Retry the allocation once more | |
1704 result = attempt_allocation_at_safepoint(word_size, | |
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|
1705 context, |
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|
1706 true /* expect_null_mutator_alloc_region */); |
342 | 1707 if (result != NULL) { |
1973 | 1708 assert(*succeeded, "sanity"); |
342 | 1709 return result; |
1710 } | |
1711 | |
1387
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6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit.
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|
1712 assert(!collector_policy()->should_clear_all_soft_refs(), |
1973 | 1713 "Flag should have been handled and cleared prior to this point"); |
1387
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1714 |
342 | 1715 // What else? We might try synchronous finalization later. If the total |
1716 // space available is large enough for the allocation, then a more | |
1717 // complete compaction phase than we've tried so far might be | |
1718 // appropriate. | |
1973 | 1719 assert(*succeeded, "sanity"); |
342 | 1720 return NULL; |
1721 } | |
1722 | |
1723 // Attempting to expand the heap sufficiently | |
1724 // to support an allocation of the given "word_size". If | |
1725 // successful, perform the allocation and return the address of the | |
1726 // allocated block, or else "NULL". | |
1727 | |
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|
1728 HeapWord* G1CollectedHeap::expand_and_allocate(size_t word_size, AllocationContext_t context) { |
2152 | 1729 assert_at_safepoint(true /* should_be_vm_thread */); |
1730 | |
1731 verify_region_sets_optional(); | |
1973 | 1732 |
2188
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1733 size_t expand_bytes = MAX2(word_size * HeapWordSize, MinHeapDeltaBytes); |
3914
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|
1734 ergo_verbose1(ErgoHeapSizing, |
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|
1735 "attempt heap expansion", |
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|
1736 ergo_format_reason("allocation request failed") |
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|
1737 ergo_format_byte("allocation request"), |
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1738 word_size * HeapWordSize); |
2188
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1739 if (expand(expand_bytes)) { |
20377
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1740 _hrm.verify_optional(); |
2188
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1741 verify_region_sets_optional(); |
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1742 return attempt_allocation_at_safepoint(word_size, |
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1743 context, |
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1744 false /* expect_null_mutator_alloc_region */); |
2188
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|
1745 } |
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1746 return NULL; |
342 | 1747 } |
1748 | |
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1749 bool G1CollectedHeap::expand(size_t expand_bytes) { |
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|
1750 size_t aligned_expand_bytes = ReservedSpace::page_align_size_up(expand_bytes); |
342 | 1751 aligned_expand_bytes = align_size_up(aligned_expand_bytes, |
1752 HeapRegion::GrainBytes); | |
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1753 ergo_verbose2(ErgoHeapSizing, |
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|
1754 "expand the heap", |
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|
1755 ergo_format_byte("requested expansion amount") |
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|
1756 ergo_format_byte("attempted expansion amount"), |
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|
1757 expand_bytes, aligned_expand_bytes); |
2188
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|
1758 |
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1759 if (is_maximal_no_gc()) { |
12345
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|
1760 ergo_verbose0(ErgoHeapSizing, |
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|
1761 "did not expand the heap", |
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|
1762 ergo_format_reason("heap already fully expanded")); |
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|
1763 return false; |
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|
1764 } |
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|
1765 |
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|
1766 uint regions_to_expand = (uint)(aligned_expand_bytes / HeapRegion::GrainBytes); |
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|
1767 assert(regions_to_expand > 0, "Must expand by at least one region"); |
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|
1768 |
20377
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|
1769 uint expanded_by = _hrm.expand_by(regions_to_expand); |
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|
1770 |
6701abbc4441
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|
1771 if (expanded_by > 0) { |
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|
1772 size_t actual_expand_bytes = expanded_by * HeapRegion::GrainBytes; |
3766 | 1773 assert(actual_expand_bytes <= aligned_expand_bytes, "post-condition"); |
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|
1774 g1_policy()->record_new_heap_size(num_regions()); |
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1775 } else { |
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1776 ergo_verbose0(ErgoHeapSizing, |
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1777 "did not expand the heap", |
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1778 ergo_format_reason("heap expansion operation failed")); |
2188
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1779 // The expansion of the virtual storage space was unsuccessful. |
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1780 // Let's see if it was because we ran out of swap. |
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1781 if (G1ExitOnExpansionFailure && |
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1782 _hrm.available() >= regions_to_expand) { |
2188
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1783 // We had head room... |
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1784 vm_exit_out_of_memory(aligned_expand_bytes, OOM_MMAP_ERROR, "G1 heap expansion"); |
342 | 1785 } |
1786 } | |
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1787 return regions_to_expand > 0; |
342 | 1788 } |
1789 | |
3766 | 1790 void G1CollectedHeap::shrink_helper(size_t shrink_bytes) { |
342 | 1791 size_t aligned_shrink_bytes = |
1792 ReservedSpace::page_align_size_down(shrink_bytes); | |
1793 aligned_shrink_bytes = align_size_down(aligned_shrink_bytes, | |
1794 HeapRegion::GrainBytes); | |
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1795 uint num_regions_to_remove = (uint)(shrink_bytes / HeapRegion::GrainBytes); |
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1796 |
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1797 uint num_regions_removed = _hrm.shrink_by(num_regions_to_remove); |
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1798 size_t shrunk_bytes = num_regions_removed * HeapRegion::GrainBytes; |
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1799 |
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1800 ergo_verbose3(ErgoHeapSizing, |
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1801 "shrink the heap", |
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1802 ergo_format_byte("requested shrinking amount") |
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1803 ergo_format_byte("aligned shrinking amount") |
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1804 ergo_format_byte("attempted shrinking amount"), |
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1805 shrink_bytes, aligned_shrink_bytes, shrunk_bytes); |
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1806 if (num_regions_removed > 0) { |
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1807 g1_policy()->record_new_heap_size(num_regions()); |
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1808 } else { |
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1809 ergo_verbose0(ErgoHeapSizing, |
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1810 "did not shrink the heap", |
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1811 ergo_format_reason("heap shrinking operation failed")); |
342 | 1812 } |
1813 } | |
1814 | |
1815 void G1CollectedHeap::shrink(size_t shrink_bytes) { | |
2152 | 1816 verify_region_sets_optional(); |
1817 | |
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1818 // We should only reach here at the end of a Full GC which means we |
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1819 // should not not be holding to any GC alloc regions. The method |
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1820 // below will make sure of that and do any remaining clean up. |
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1821 _allocator->abandon_gc_alloc_regions(); |
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1822 |
2152 | 1823 // Instead of tearing down / rebuilding the free lists here, we |
1824 // could instead use the remove_all_pending() method on free_list to | |
1825 // remove only the ones that we need to remove. | |
4072 | 1826 tear_down_region_sets(true /* free_list_only */); |
342 | 1827 shrink_helper(shrink_bytes); |
4072 | 1828 rebuild_region_sets(true /* free_list_only */); |
2152 | 1829 |
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1830 _hrm.verify_optional(); |
2152 | 1831 verify_region_sets_optional(); |
342 | 1832 } |
1833 | |
1834 // Public methods. | |
1835 | |
1836 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away | |
1837 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list | |
1838 #endif // _MSC_VER | |
1839 | |
1840 | |
1841 G1CollectedHeap::G1CollectedHeap(G1CollectorPolicy* policy_) : | |
1842 SharedHeap(policy_), | |
1843 _g1_policy(policy_), | |
1111 | 1844 _dirty_card_queue_set(false), |
1705 | 1845 _into_cset_dirty_card_queue_set(false), |
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1846 _is_alive_closure_cm(this), |
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1847 _is_alive_closure_stw(this), |
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1848 _ref_processor_cm(NULL), |
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1849 _ref_processor_stw(NULL), |
342 | 1850 _bot_shared(NULL), |
10405 | 1851 _evac_failure_scan_stack(NULL), |
342 | 1852 _mark_in_progress(false), |
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1853 _cg1r(NULL), |
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1854 _g1mm(NULL), |
342 | 1855 _refine_cte_cl(NULL), |
1856 _full_collection(false), | |
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1857 _secondary_free_list("Secondary Free List", new SecondaryFreeRegionListMtSafeChecker()), |
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1858 _old_set("Old Set", false /* humongous */, new OldRegionSetMtSafeChecker()), |
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1859 _humongous_set("Master Humongous Set", true /* humongous */, new HumongousRegionSetMtSafeChecker()), |
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1860 _humongous_reclaim_candidates(), |
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1861 _has_humongous_reclaim_candidates(false), |
2152 | 1862 _free_regions_coming(false), |
342 | 1863 _young_list(new YoungList(this)), |
1864 _gc_time_stamp(0), | |
6595 | 1865 _survivor_plab_stats(YoungPLABSize, PLABWeight), |
1866 _old_plab_stats(OldPLABSize, PLABWeight), | |
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1867 _expand_heap_after_alloc_failure(true), |
526 | 1868 _surviving_young_words(NULL), |
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1869 _old_marking_cycles_started(0), |
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1870 _old_marking_cycles_completed(0), |
10405 | 1871 _concurrent_cycle_started(false), |
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1872 _heap_summary_sent(false), |
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1873 _in_cset_fast_test(), |
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1874 _dirty_cards_region_list(NULL), |
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1875 _worker_cset_start_region(NULL), |
10405 | 1876 _worker_cset_start_region_time_stamp(NULL), |
1877 _gc_timer_stw(new (ResourceObj::C_HEAP, mtGC) STWGCTimer()), | |
1878 _gc_timer_cm(new (ResourceObj::C_HEAP, mtGC) ConcurrentGCTimer()), | |
1879 _gc_tracer_stw(new (ResourceObj::C_HEAP, mtGC) G1NewTracer()), | |
1880 _gc_tracer_cm(new (ResourceObj::C_HEAP, mtGC) G1OldTracer()) { | |
1881 | |
1882 _g1h = this; | |
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1883 |
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1884 _allocator = G1Allocator::create_allocator(_g1h); |
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1885 _humongous_object_threshold_in_words = HeapRegion::GrainWords / 2; |
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1886 |
342 | 1887 int n_queues = MAX2((int)ParallelGCThreads, 1); |
1888 _task_queues = new RefToScanQueueSet(n_queues); | |
1889 | |
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1890 uint n_rem_sets = HeapRegionRemSet::num_par_rem_sets(); |
342 | 1891 assert(n_rem_sets > 0, "Invariant."); |
1892 | |
6197 | 1893 _worker_cset_start_region = NEW_C_HEAP_ARRAY(HeapRegion*, n_queues, mtGC); |
22936 | 1894 _worker_cset_start_region_time_stamp = NEW_C_HEAP_ARRAY(uint, n_queues, mtGC); |
10405 | 1895 _evacuation_failed_info_array = NEW_C_HEAP_ARRAY(EvacuationFailedInfo, n_queues, mtGC); |
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1896 |
342 | 1897 for (int i = 0; i < n_queues; i++) { |
1898 RefToScanQueue* q = new RefToScanQueue(); | |
1899 q->initialize(); | |
1900 _task_queues->register_queue(i, q); | |
10405 | 1901 ::new (&_evacuation_failed_info_array[i]) EvacuationFailedInfo(); |
1902 } | |
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1903 clear_cset_start_regions(); |
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1904 |
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1905 // Initialize the G1EvacuationFailureALot counters and flags. |
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1906 NOT_PRODUCT(reset_evacuation_should_fail();) |
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1907 |
342 | 1908 guarantee(_task_queues != NULL, "task_queues allocation failure."); |
1909 } | |
1910 | |
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1911 G1RegionToSpaceMapper* G1CollectedHeap::create_aux_memory_mapper(const char* description, |
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1912 size_t size, |
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1913 size_t translation_factor) { |
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1914 size_t preferred_page_size = os::page_size_for_region_unaligned(size, 1); |
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1915 // Allocate a new reserved space, preferring to use large pages. |
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1916 ReservedSpace rs(size, preferred_page_size); |
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1917 G1RegionToSpaceMapper* result = |
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1918 G1RegionToSpaceMapper::create_mapper(rs, |
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1919 size, |
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1920 rs.alignment(), |
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1921 HeapRegion::GrainBytes, |
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1922 translation_factor, |
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1923 mtGC); |
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1924 if (TracePageSizes) { |
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1925 gclog_or_tty->print_cr("G1 '%s': pg_sz=" SIZE_FORMAT " base=" PTR_FORMAT " size=" SIZE_FORMAT " alignment=" SIZE_FORMAT " reqsize=" SIZE_FORMAT, |
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1926 description, preferred_page_size, p2i(rs.base()), rs.size(), rs.alignment(), size); |
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1927 } |
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1928 return result; |
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1929 } |
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1930 |
342 | 1931 jint G1CollectedHeap::initialize() { |
1166 | 1932 CollectedHeap::pre_initialize(); |
342 | 1933 os::enable_vtime(); |
1934 | |
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1935 G1Log::init(); |
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1936 |
342 | 1937 // Necessary to satisfy locking discipline assertions. |
1938 | |
1939 MutexLocker x(Heap_lock); | |
1940 | |
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1941 // We have to initialize the printer before committing the heap, as |
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1942 // it will be used then. |
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1943 _hr_printer.set_active(G1PrintHeapRegions); |
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1944 |
342 | 1945 // While there are no constraints in the GC code that HeapWordSize |
1946 // be any particular value, there are multiple other areas in the | |
1947 // system which believe this to be true (e.g. oop->object_size in some | |
1948 // cases incorrectly returns the size in wordSize units rather than | |
1949 // HeapWordSize). | |
1950 guarantee(HeapWordSize == wordSize, "HeapWordSize must equal wordSize"); | |
1951 | |
1952 size_t init_byte_size = collector_policy()->initial_heap_byte_size(); | |
1953 size_t max_byte_size = collector_policy()->max_heap_byte_size(); | |
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1954 size_t heap_alignment = collector_policy()->heap_alignment(); |
342 | 1955 |
1956 // Ensure that the sizes are properly aligned. | |
1957 Universe::check_alignment(init_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
1958 Universe::check_alignment(max_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
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1959 Universe::check_alignment(max_byte_size, heap_alignment, "g1 heap"); |
342 | 1960 |
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1961 _refine_cte_cl = new RefineCardTableEntryClosure(); |
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1962 |
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1963 _cg1r = new ConcurrentG1Refine(this, _refine_cte_cl); |
342 | 1964 |
1965 // Reserve the maximum. | |
642
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1966 |
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1967 // When compressed oops are enabled, the preferred heap base |
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1968 // is calculated by subtracting the requested size from the |
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1969 // 32Gb boundary and using the result as the base address for |
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1970 // heap reservation. If the requested size is not aligned to |
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1971 // HeapRegion::GrainBytes (i.e. the alignment that is passed |
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1972 // into the ReservedHeapSpace constructor) then the actual |
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1973 // base of the reserved heap may end up differing from the |
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1974 // address that was requested (i.e. the preferred heap base). |
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1975 // If this happens then we could end up using a non-optimal |
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1976 // compressed oops mode. |
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1977 |
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1978 ReservedSpace heap_rs = Universe::reserve_heap(max_byte_size, |
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1979 heap_alignment); |
342 | 1980 |
1981 // It is important to do this in a way such that concurrent readers can't | |
10405 | 1982 // temporarily think something is in the heap. (I've actually seen this |
342 | 1983 // happen in asserts: DLD.) |
1984 _reserved.set_word_size(0); | |
1985 _reserved.set_start((HeapWord*)heap_rs.base()); | |
1986 _reserved.set_end((HeapWord*)(heap_rs.base() + heap_rs.size())); | |
1987 | |
1988 // Create the gen rem set (and barrier set) for the entire reserved region. | |
1989 _rem_set = collector_policy()->create_rem_set(_reserved, 2); | |
1990 set_barrier_set(rem_set()->bs()); | |
12343 | 1991 if (!barrier_set()->is_a(BarrierSet::G1SATBCTLogging)) { |
1992 vm_exit_during_initialization("G1 requires a G1SATBLoggingCardTableModRefBS"); | |
342 | 1993 return JNI_ENOMEM; |
1994 } | |
1995 | |
1996 // Also create a G1 rem set. | |
12343 | 1997 _g1_rem_set = new G1RemSet(this, g1_barrier_set()); |
342 | 1998 |
1999 // Carve out the G1 part of the heap. | |
2000 | |
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2001 ReservedSpace g1_rs = heap_rs.first_part(max_byte_size); |
20337 | 2002 G1RegionToSpaceMapper* heap_storage = |
2003 G1RegionToSpaceMapper::create_mapper(g1_rs, | |
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2004 g1_rs.size(), |
20337 | 2005 UseLargePages ? os::large_page_size() : os::vm_page_size(), |
2006 HeapRegion::GrainBytes, | |
2007 1, | |
2008 mtJavaHeap); | |
2009 heap_storage->set_mapping_changed_listener(&_listener); | |
2010 | |
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2011 // Create storage for the BOT, card table, card counts table (hot card cache) and the bitmaps. |
20337 | 2012 G1RegionToSpaceMapper* bot_storage = |
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|
2013 create_aux_memory_mapper("Block offset table", |
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2014 G1BlockOffsetSharedArray::compute_size(g1_rs.size() / HeapWordSize), |
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|
2015 G1BlockOffsetSharedArray::N_bytes); |
20337 | 2016 |
2017 ReservedSpace cardtable_rs(G1SATBCardTableLoggingModRefBS::compute_size(g1_rs.size() / HeapWordSize)); | |
2018 G1RegionToSpaceMapper* cardtable_storage = | |
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2019 create_aux_memory_mapper("Card table", |
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2020 G1SATBCardTableLoggingModRefBS::compute_size(g1_rs.size() / HeapWordSize), |
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2021 G1BlockOffsetSharedArray::N_bytes); |
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|
2022 |
20337 | 2023 G1RegionToSpaceMapper* card_counts_storage = |
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|
2024 create_aux_memory_mapper("Card counts table", |
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|
2025 G1BlockOffsetSharedArray::compute_size(g1_rs.size() / HeapWordSize), |
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|
2026 G1BlockOffsetSharedArray::N_bytes); |
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|
2027 |
20337 | 2028 size_t bitmap_size = CMBitMap::compute_size(g1_rs.size()); |
2029 G1RegionToSpaceMapper* prev_bitmap_storage = | |
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|
2030 create_aux_memory_mapper("Prev Bitmap", bitmap_size, CMBitMap::mark_distance()); |
20337 | 2031 G1RegionToSpaceMapper* next_bitmap_storage = |
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|
2032 create_aux_memory_mapper("Next Bitmap", bitmap_size, CMBitMap::mark_distance()); |
20337 | 2033 |
20377
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|
2034 _hrm.initialize(heap_storage, prev_bitmap_storage, next_bitmap_storage, bot_storage, cardtable_storage, card_counts_storage); |
20337 | 2035 g1_barrier_set()->initialize(cardtable_storage); |
2036 // Do later initialization work for concurrent refinement. | |
2037 _cg1r->init(card_counts_storage); | |
10246
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|
2038 |
807
d44bdab1c03d
6843694: G1: assert(index < _vs.committed_size(),"bad index"), g1BlockOffsetTable.inline.hpp:55
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diff
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|
2039 // 6843694 - ensure that the maximum region index can fit |
d44bdab1c03d
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|
2040 // in the remembered set structures. |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
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diff
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|
2041 const uint max_region_idx = (1U << (sizeof(RegionIdx_t)*BitsPerByte-1)) - 1; |
807
d44bdab1c03d
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|
2042 guarantee((max_regions() - 1) <= max_region_idx, "too many regions"); |
d44bdab1c03d
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diff
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|
2043 |
d44bdab1c03d
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diff
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|
2044 size_t max_cards_per_region = ((size_t)1 << (sizeof(CardIdx_t)*BitsPerByte-1)) - 1; |
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
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941
diff
changeset
|
2045 guarantee(HeapRegion::CardsPerRegion > 0, "make sure it's initialized"); |
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
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3983
diff
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|
2046 guarantee(HeapRegion::CardsPerRegion < max_cards_per_region, |
942
2c79770d1f6e
6819085: G1: use larger and/or user settable region size
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|
2047 "too many cards per region"); |
807
d44bdab1c03d
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|
2048 |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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17727
diff
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|
2049 FreeRegionList::set_unrealistically_long_length(max_regions() + 1); |
2152 | 2050 |
20337 | 2051 _bot_shared = new G1BlockOffsetSharedArray(_reserved, bot_storage); |
342 | 2052 |
2053 _g1h = this; | |
2054 | |
23026
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|
2055 { |
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|
2056 HeapWord* start = _hrm.reserved().start(); |
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|
2057 HeapWord* end = _hrm.reserved().end(); |
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diff
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|
2058 size_t granularity = HeapRegion::GrainBytes; |
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|
2059 |
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|
2060 _in_cset_fast_test.initialize(start, end, granularity); |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
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|
2061 _humongous_reclaim_candidates.initialize(start, end, granularity); |
b7c8142a9e0b
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diff
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|
2062 } |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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1391
diff
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|
2063 |
342 | 2064 // Create the ConcurrentMark data structure and thread. |
2065 // (Must do this late, so that "max_regions" is defined.) | |
20337 | 2066 _cm = new ConcurrentMark(this, prev_bitmap_storage, next_bitmap_storage); |
7397
442f942757c0
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7207
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|
2067 if (_cm == NULL || !_cm->completed_initialization()) { |
442f942757c0
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7207
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|
2068 vm_shutdown_during_initialization("Could not create/initialize ConcurrentMark"); |
442f942757c0
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|
2069 return JNI_ENOMEM; |
442f942757c0
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|
2070 } |
342 | 2071 _cmThread = _cm->cmThread(); |
2072 | |
2073 // Initialize the from_card cache structure of HeapRegionRemSet. | |
2074 HeapRegionRemSet::init_heap(max_regions()); | |
2075 | |
677 | 2076 // 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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|
2077 if (!expand(init_byte_size)) { |
7397
442f942757c0
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|
2078 vm_shutdown_during_initialization("Failed to allocate initial heap."); |
2188
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|
2079 return JNI_ENOMEM; |
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|
2080 } |
342 | 2081 |
2082 // Perform any initialization actions delegated to the policy. | |
2083 g1_policy()->init(); | |
2084 | |
2085 JavaThread::satb_mark_queue_set().initialize(SATB_Q_CBL_mon, | |
2086 SATB_Q_FL_lock, | |
1111 | 2087 G1SATBProcessCompletedThreshold, |
342 | 2088 Shared_SATB_Q_lock); |
794 | 2089 |
20216
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|
2090 JavaThread::dirty_card_queue_set().initialize(_refine_cte_cl, |
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|
2091 DirtyCardQ_CBL_mon, |
794 | 2092 DirtyCardQ_FL_lock, |
1111 | 2093 concurrent_g1_refine()->yellow_zone(), |
2094 concurrent_g1_refine()->red_zone(), | |
794 | 2095 Shared_DirtyCardQ_lock); |
2096 | |
20504
6948da6d7c13
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|
2097 dirty_card_queue_set().initialize(NULL, // Should never be called by the Java code |
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|
2098 DirtyCardQ_CBL_mon, |
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|
2099 DirtyCardQ_FL_lock, |
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|
2100 -1, // never trigger processing |
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|
2101 -1, // no limit on length |
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|
2102 Shared_DirtyCardQ_lock, |
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diff
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|
2103 &JavaThread::dirty_card_queue_set()); |
1705 | 2104 |
2105 // Initialize the card queue set used to hold cards containing | |
2106 // references into the collection set. | |
20216
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|
2107 _into_cset_dirty_card_queue_set.initialize(NULL, // Should never be called by the Java code |
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|
2108 DirtyCardQ_CBL_mon, |
1705 | 2109 DirtyCardQ_FL_lock, |
2110 -1, // never trigger processing | |
2111 -1, // no limit on length | |
2112 Shared_DirtyCardQ_lock, | |
2113 &JavaThread::dirty_card_queue_set()); | |
2114 | |
342 | 2115 // In case we're keeping closure specialization stats, initialize those |
2116 // counts and that mechanism. | |
2117 SpecializationStats::clear(); | |
2118 | |
20336
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|
2119 // Here we allocate the dummy HeapRegion that is required by the |
6701abbc4441
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2120 // G1AllocRegion class. |
20377
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|
2121 HeapRegion* dummy_region = _hrm.get_dummy_region(); |
20337 | 2122 |
2433
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|
2123 // We'll re-use the same region whether the alloc region will |
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|
2124 // require BOT updates or not and, if it doesn't, then a non-young |
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|
2125 // region will complain that it cannot support allocations without |
20481
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
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20445
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|
2126 // 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
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diff
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|
2127 dummy_region->set_eden(); |
2433
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|
2128 // Make sure it's full. |
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|
2129 dummy_region->set_top(dummy_region->end()); |
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diff
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|
2130 G1AllocRegion::setup(this, dummy_region); |
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diff
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|
2131 |
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
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20377
diff
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|
2132 _allocator->init_mutator_alloc_region(); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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|
2133 |
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
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|
2134 // Do create of the monitoring and management support so that |
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
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|
2135 // values in the heap have been properly initialized. |
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
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|
2136 _g1mm = new G1MonitoringSupport(this); |
3289
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|
2137 |
17764 | 2138 G1StringDedup::initialize(); |
2139 | |
342 | 2140 return JNI_OK; |
2141 } | |
2142 | |
17947
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
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parents:
17937
diff
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|
2143 void G1CollectedHeap::stop() { |
17992 | 2144 // Stop all concurrent threads. We do this to make sure these threads |
2145 // do not continue to execute and access resources (e.g. gclog_or_tty) | |
17947
1772223a25a2
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diff
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|
2146 // that are destroyed during shutdown. |
17992 | 2147 _cg1r->stop(); |
2148 _cmThread->stop(); | |
2149 if (G1StringDedup::is_enabled()) { | |
2150 G1StringDedup::stop(); | |
2151 } | |
17947
1772223a25a2
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|
2152 } |
1772223a25a2
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|
2153 |
12233
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
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|
2154 size_t G1CollectedHeap::conservative_max_heap_alignment() { |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
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|
2155 return HeapRegion::max_region_size(); |
40136aa2cdb1
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|
2156 } |
40136aa2cdb1
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|
2157 |
342 | 2158 void G1CollectedHeap::ref_processing_init() { |
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
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|
2159 // Reference processing in G1 currently works as follows: |
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
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|
2160 // |
3979
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|
2161 // * There are two reference processor instances. One is |
4dfb2df418f2
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|
2162 // used to record and process discovered references |
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|
2163 // during concurrent marking; the other is used to |
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|
2164 // record and process references during STW pauses |
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|
2165 // (both full and incremental). |
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|
2166 // * Both ref processors need to 'span' the entire heap as |
4dfb2df418f2
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|
2167 // the regions in the collection set may be dotted around. |
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|
2168 // |
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|
2169 // * For the concurrent marking ref processor: |
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|
2170 // * Reference discovery is enabled at initial marking. |
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|
2171 // * Reference discovery is disabled and the discovered |
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|
2172 // references processed etc during remarking. |
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|
2173 // * Reference discovery is MT (see below). |
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|
2174 // * Reference discovery requires a barrier (see below). |
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|
2175 // * Reference processing may or may not be MT |
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|
2176 // (depending on the value of ParallelRefProcEnabled |
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|
2177 // and ParallelGCThreads). |
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|
2178 // * A full GC disables reference discovery by the CM |
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|
2179 // ref processor and abandons any entries on it's |
4dfb2df418f2
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|
2180 // discovered lists. |
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|
2181 // |
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|
2182 // * For the STW processor: |
4dfb2df418f2
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|
2183 // * Non MT discovery is enabled at the start of a full GC. |
4dfb2df418f2
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|
2184 // * Processing and enqueueing during a full GC is non-MT. |
4dfb2df418f2
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|
2185 // * During a full GC, references are processed after marking. |
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|
2186 // |
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|
2187 // * Discovery (may or may not be MT) is enabled at the start |
4dfb2df418f2
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|
2188 // of an incremental evacuation pause. |
4dfb2df418f2
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|
2189 // * References are processed near the end of a STW evacuation pause. |
4dfb2df418f2
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|
2190 // * For both types of GC: |
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|
2191 // * Discovery is atomic - i.e. not concurrent. |
4dfb2df418f2
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|
2192 // * Reference discovery will not need a barrier. |
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
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|
2193 |
342 | 2194 SharedHeap::ref_processing_init(); |
2195 MemRegion mr = reserved_region(); | |
3979
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|
2196 |
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|
2197 // Concurrent Mark ref processor |
4dfb2df418f2
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|
2198 _ref_processor_cm = |
2369
92da084fefc9
6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads
ysr
parents:
2361
diff
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|
2199 new ReferenceProcessor(mr, // span |
3979
4dfb2df418f2
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|
2200 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
4dfb2df418f2
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|
2201 // mt processing |
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|
2202 (int) ParallelGCThreads, |
4dfb2df418f2
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parents:
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diff
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|
2203 // degree of mt processing |
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|
2204 (ParallelGCThreads > 1) || (ConcGCThreads > 1), |
4dfb2df418f2
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parents:
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diff
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|
2205 // mt discovery |
4dfb2df418f2
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|
2206 (int) MAX2(ParallelGCThreads, ConcGCThreads), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
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|
2207 // degree of mt discovery |
4dfb2df418f2
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parents:
3973
diff
changeset
|
2208 false, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
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|
2209 // Reference discovery is not atomic |
17976
8e20ef014b08
8043239: G1: Missing post barrier in processing of j.l.ref.Reference objects
brutisso
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17948
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|
2210 &_is_alive_closure_cm); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
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|
2211 // is alive closure |
4dfb2df418f2
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johnc
parents:
3973
diff
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|
2212 // (for efficiency/performance) |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2213 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
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|
2214 // STW ref processor |
4dfb2df418f2
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parents:
3973
diff
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|
2215 _ref_processor_stw = |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2216 new ReferenceProcessor(mr, // span |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
2217 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
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|
2218 // mt processing |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
2219 MAX2((int)ParallelGCThreads, 1), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2220 // degree of mt processing |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2221 (ParallelGCThreads > 1), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2222 // mt discovery |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
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|
2223 MAX2((int)ParallelGCThreads, 1), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
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|
2224 // degree of mt discovery |
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
2225 true, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
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|
2226 // Reference discovery is atomic |
17976
8e20ef014b08
8043239: G1: Missing post barrier in processing of j.l.ref.Reference objects
brutisso
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17948
diff
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|
2227 &_is_alive_closure_stw); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
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|
2228 // is alive closure |
4dfb2df418f2
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parents:
3973
diff
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|
2229 // (for efficiency/performance) |
342 | 2230 } |
2231 | |
2232 size_t G1CollectedHeap::capacity() const { | |
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
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|
2233 return _hrm.length() * HeapRegion::GrainBytes; |
342 | 2234 } |
2235 | |
6254
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|
2236 void G1CollectedHeap::reset_gc_time_stamps(HeapRegion* hr) { |
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|
2237 assert(!hr->continuesHumongous(), "pre-condition"); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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|
2238 hr->reset_gc_time_stamp(); |
a2f7274eb6ef
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|
2239 if (hr->startsHumongous()) { |
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
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20359
diff
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|
2240 uint first_index = hr->hrm_index() + 1; |
6254
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|
2241 uint last_index = hr->last_hc_index(); |
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|
2242 for (uint i = first_index; i < last_index; i += 1) { |
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|
2243 HeapRegion* chr = region_at(i); |
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|
2244 assert(chr->continuesHumongous(), "sanity"); |
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|
2245 chr->reset_gc_time_stamp(); |
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|
2246 } |
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|
2247 } |
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|
2248 } |
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|
2249 |
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|
2250 #ifndef PRODUCT |
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|
2251 class CheckGCTimeStampsHRClosure : public HeapRegionClosure { |
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|
2252 private: |
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|
2253 unsigned _gc_time_stamp; |
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|
2254 bool _failures; |
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|
2255 |
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|
2256 public: |
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|
2257 CheckGCTimeStampsHRClosure(unsigned gc_time_stamp) : |
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|
2258 _gc_time_stamp(gc_time_stamp), _failures(false) { } |
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|
2259 |
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|
2260 virtual bool doHeapRegion(HeapRegion* hr) { |
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|
2261 unsigned region_gc_time_stamp = hr->get_gc_time_stamp(); |
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|
2262 if (_gc_time_stamp != region_gc_time_stamp) { |
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|
2263 gclog_or_tty->print_cr("Region "HR_FORMAT" has GC time stamp = %d, " |
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|
2264 "expected %d", HR_FORMAT_PARAMS(hr), |
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|
2265 region_gc_time_stamp, _gc_time_stamp); |
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|
2266 _failures = true; |
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|
2267 } |
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|
2268 return false; |
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|
2269 } |
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|
2270 |
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|
2271 bool failures() { return _failures; } |
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|
2272 }; |
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|
2273 |
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|
2274 void G1CollectedHeap::check_gc_time_stamps() { |
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|
2275 CheckGCTimeStampsHRClosure cl(_gc_time_stamp); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
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6220
diff
changeset
|
2276 heap_region_iterate(&cl); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2277 guarantee(!cl.failures(), "all GC time stamps should have been reset"); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2278 } |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2279 #endif // PRODUCT |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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parents:
6220
diff
changeset
|
2280 |
1705 | 2281 void G1CollectedHeap::iterate_dirty_card_closure(CardTableEntryClosure* cl, |
2282 DirtyCardQueue* into_cset_dcq, | |
2283 bool concurrent, | |
17844
8847586c9037
8016302: Change type of the number of GC workers to unsigned int (2)
vkempik
parents:
17833
diff
changeset
|
2284 uint worker_i) { |
889 | 2285 // Clean cards in the hot card cache |
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2286 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
|
2287 hot_card_cache->drain(worker_i, g1_rem_set(), into_cset_dcq); |
889 | 2288 |
342 | 2289 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); |
23223
8f8f1d578796
8074037: Refactor the G1GCPhaseTime logging to make it easier to add new phases
brutisso
parents:
23222
diff
changeset
|
2290 size_t n_completed_buffers = 0; |
1705 | 2291 while (dcqs.apply_closure_to_completed_buffer(cl, worker_i, 0, true)) { |
342 | 2292 n_completed_buffers++; |
2293 } | |
23223
8f8f1d578796
8074037: Refactor the G1GCPhaseTime logging to make it easier to add new phases
brutisso
parents:
23222
diff
changeset
|
2294 g1_policy()->phase_times()->record_thread_work_item(G1GCPhaseTimes::UpdateRS, worker_i, n_completed_buffers); |
342 | 2295 dcqs.clear_n_completed_buffers(); |
2296 assert(!dcqs.completed_buffers_exist_dirty(), "Completed buffers exist!"); | |
2297 } | |
2298 | |
2299 | |
2300 // Computes the sum of the storage used by the various regions. | |
2301 size_t G1CollectedHeap::used() const { | |
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
2302 return _allocator->used(); |
342 | 2303 } |
2304 | |
846
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2305 size_t G1CollectedHeap::used_unlocked() const { |
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
2306 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
|
2307 } |
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2308 |
342 | 2309 class SumUsedClosure: public HeapRegionClosure { |
2310 size_t _used; | |
2311 public: | |
2312 SumUsedClosure() : _used(0) {} | |
2313 bool doHeapRegion(HeapRegion* r) { | |
2314 if (!r->continuesHumongous()) { | |
2315 _used += r->used(); | |
2316 } | |
2317 return false; | |
2318 } | |
2319 size_t result() { return _used; } | |
2320 }; | |
2321 | |
2322 size_t G1CollectedHeap::recalculate_used() const { | |
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
2323 double recalculate_used_start = os::elapsedTime(); |
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
2324 |
342 | 2325 SumUsedClosure blk; |
3766 | 2326 heap_region_iterate(&blk); |
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
2327 |
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
2328 g1_policy()->phase_times()->record_evac_fail_recalc_used_time((os::elapsedTime() - recalculate_used_start) * 1000.0); |
342 | 2329 return blk.result(); |
2330 } | |
2331 | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2332 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
|
2333 switch (cause) { |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2334 case GCCause::_gc_locker: return GCLockerInvokesConcurrent; |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2335 case GCCause::_java_lang_system_gc: return ExplicitGCInvokesConcurrent; |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2336 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
|
2337 case GCCause::_update_allocation_context_stats_inc: return true; |
23472
047a642c9729
8065579: WB method to start G1 concurrent mark cycle should be introduced
kevinw
parents:
23463
diff
changeset
|
2338 case GCCause::_wb_conc_mark: return true; |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2339 default: return false; |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2340 } |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2341 } |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2342 |
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2343 #ifndef PRODUCT |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2344 void G1CollectedHeap::allocate_dummy_regions() { |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2345 // Let's fill up most of the region |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2346 size_t word_size = HeapRegion::GrainWords - 1024; |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2347 // 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
|
2348 guarantee(isHumongous(word_size), "sanity"); |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2349 |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2350 for (uintx i = 0; i < G1DummyRegionsPerGC; ++i) { |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2351 // Let's use the existing mechanism for the allocation |
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
2352 HeapWord* dummy_obj = humongous_obj_allocate(word_size, |
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
2353 AllocationContext::system()); |
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2354 if (dummy_obj != NULL) { |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2355 MemRegion mr(dummy_obj, word_size); |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2356 CollectedHeap::fill_with_object(mr); |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2357 } else { |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2358 // 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
|
2359 // again. Let's get out of the loop. |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2360 break; |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2361 } |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2362 } |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2363 } |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2364 #endif // !PRODUCT |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2365 |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2366 void G1CollectedHeap::increment_old_marking_cycles_started() { |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2367 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
|
2368 _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
|
2369 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
|
2370 _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
|
2371 |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2372 _old_marking_cycles_started++; |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2373 } |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2374 |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2375 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
|
2376 MonitorLockerEx x(FullGCCount_lock, Mutex::_no_safepoint_check_flag); |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2377 |
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2378 // 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
|
2379 // 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
|
2380 // 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
|
2381 // assert here. |
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2382 |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2383 // 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
|
2384 // 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
|
2385 // interrupt a concurrent cycle), the number of full collections |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2386 // 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
|
2387 // 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
|
2388 // behind the number of full collections started. |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2389 |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2390 // 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
|
2391 assert(concurrent || |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2392 (_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
|
2393 (_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
|
2394 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
|
2395 "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
|
2396 _old_marking_cycles_started, _old_marking_cycles_completed)); |
1656
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 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
|
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), |
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2401 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
|
2402 "_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)); |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2405 |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2406 _old_marking_cycles_completed += 1; |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2407 |
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2408 // 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
|
2409 // we wake up any waiters (especially when ExplicitInvokesConcurrent |
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2410 // is set) so that if a waiter requests another System.gc() it doesn't |
10405 | 2411 // 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
|
2412 if (concurrent) { |
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2413 _cmThread->clear_in_progress(); |
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2414 } |
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2415 |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2416 // 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
|
2417 // System.gc() with (with ExplicitGCInvokesConcurrent set or not) |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2418 // 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
|
2419 // waiting in VM_G1IncCollectionPause::doit_epilogue(). |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2420 FullGCCount_lock->notify_all(); |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2421 } |
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2422 |
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2423 void G1CollectedHeap::register_concurrent_cycle_start(const Ticks& start_time) { |
10405 | 2424 _concurrent_cycle_started = true; |
2425 _gc_timer_cm->register_gc_start(start_time); | |
2426 | |
2427 _gc_tracer_cm->report_gc_start(gc_cause(), _gc_timer_cm->gc_start()); | |
2428 trace_heap_before_gc(_gc_tracer_cm); | |
2429 } | |
2430 | |
2431 void G1CollectedHeap::register_concurrent_cycle_end() { | |
2432 if (_concurrent_cycle_started) { | |
2433 if (_cm->has_aborted()) { | |
2434 _gc_tracer_cm->report_concurrent_mode_failure(); | |
2435 } | |
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2436 |
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2437 _gc_timer_cm->register_gc_end(); |
10405 | 2438 _gc_tracer_cm->report_gc_end(_gc_timer_cm->gc_end(), _gc_timer_cm->time_partitions()); |
2439 | |
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|
2440 // Clear state variables to prepare for the next concurrent cycle. |
10405 | 2441 _concurrent_cycle_started = false; |
22898
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|
2442 _heap_summary_sent = false; |
10405 | 2443 } |
2444 } | |
2445 | |
2446 void G1CollectedHeap::trace_heap_after_concurrent_cycle() { | |
2447 if (_concurrent_cycle_started) { | |
22898
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|
2448 // This function can be called when: |
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|
2449 // the cleanup pause is run |
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2450 // the concurrent cycle is aborted before the cleanup pause. |
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2451 // the concurrent cycle is aborted after the cleanup pause, |
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|
2452 // but before the concurrent cycle end has been registered. |
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|
2453 // Make sure that we only send the heap information once. |
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2454 if (!_heap_summary_sent) { |
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2455 trace_heap_after_gc(_gc_tracer_cm); |
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|
2456 _heap_summary_sent = true; |
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2457 } |
10405 | 2458 } |
2459 } | |
2460 | |
2461 G1YCType G1CollectedHeap::yc_type() { | |
2462 bool is_young = g1_policy()->gcs_are_young(); | |
2463 bool is_initial_mark = g1_policy()->during_initial_mark_pause(); | |
2464 bool is_during_mark = mark_in_progress(); | |
2465 | |
2466 if (is_initial_mark) { | |
2467 return InitialMark; | |
2468 } else if (is_during_mark) { | |
2469 return DuringMark; | |
2470 } else if (is_young) { | |
2471 return Normal; | |
2472 } else { | |
2473 return Mixed; | |
2474 } | |
2475 } | |
2476 | |
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2477 void G1CollectedHeap::collect(GCCause::Cause cause) { |
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2478 assert_heap_not_locked(); |
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2479 |
22936 | 2480 uint gc_count_before; |
2481 uint old_marking_count_before; | |
2482 uint full_gc_count_before; | |
4910
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2483 bool retry_gc; |
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2484 |
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|
2485 do { |
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|
2486 retry_gc = false; |
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|
2487 |
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|
2488 { |
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|
2489 MutexLocker ml(Heap_lock); |
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|
2490 |
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|
2491 // Read the GC count while holding the Heap_lock |
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|
2492 gc_count_before = total_collections(); |
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2493 full_gc_count_before = total_full_collections(); |
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|
2494 old_marking_count_before = _old_marking_cycles_started; |
4910
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|
2495 } |
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|
2496 |
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|
2497 if (should_do_concurrent_full_gc(cause)) { |
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2498 // Schedule an initial-mark evacuation pause that will start a |
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|
2499 // concurrent cycle. We're setting word_size to 0 which means that |
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|
2500 // we are not requesting a post-GC allocation. |
1656
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|
2501 VM_G1IncCollectionPause op(gc_count_before, |
1973 | 2502 0, /* word_size */ |
4910
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|
2503 true, /* should_initiate_conc_mark */ |
1656
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|
2504 g1_policy()->max_pause_time_ms(), |
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diff
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|
2505 cause); |
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
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diff
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|
2506 op.set_allocation_context(AllocationContext::current()); |
5963
64bf7c8270cb
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|
2507 |
1088
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|
2508 VMThread::execute(&op); |
4910
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|
2509 if (!op.pause_succeeded()) { |
6120
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2510 if (old_marking_count_before == _old_marking_cycles_started) { |
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
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|
2511 retry_gc = op.should_retry_gc(); |
4910
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|
2512 } else { |
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|
2513 // A Full GC happened while we were trying to schedule the |
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|
2514 // initial-mark GC. No point in starting a new cycle given |
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|
2515 // that the whole heap was collected anyway. |
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|
2516 } |
5963
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|
2517 |
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|
2518 if (retry_gc) { |
64bf7c8270cb
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diff
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|
2519 if (GC_locker::is_active_and_needs_gc()) { |
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
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diff
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|
2520 GC_locker::stall_until_clear(); |
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4912
diff
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|
2521 } |
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diff
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|
2522 } |
4910
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|
2523 } |
1656
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6944166: G1: explicit GCs are not always handled correctly
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diff
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|
2524 } else { |
20357
4bfc44ba0d19
8055098: WB API should be extended to provide information about size and age of object.
tschatzl
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20337
diff
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|
2525 if (cause == GCCause::_gc_locker || cause == GCCause::_wb_young_gc |
4910
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|
2526 DEBUG_ONLY(|| cause == GCCause::_scavenge_alot)) { |
caa4652b4414
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|
2527 |
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|
2528 // Schedule a standard evacuation pause. We're setting word_size |
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|
2529 // to 0 which means that we are not requesting a post-GC allocation. |
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|
2530 VM_G1IncCollectionPause op(gc_count_before, |
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|
2531 0, /* word_size */ |
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|
2532 false, /* should_initiate_conc_mark */ |
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|
2533 g1_policy()->max_pause_time_ms(), |
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|
2534 cause); |
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|
2535 VMThread::execute(&op); |
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|
2536 } else { |
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|
2537 // Schedule a Full GC. |
20571
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|
2538 VM_G1CollectFull op(gc_count_before, full_gc_count_before, cause); |
4910
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|
2539 VMThread::execute(&op); |
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|
2540 } |
1088
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|
2541 } |
4910
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|
2542 } while (retry_gc); |
342 | 2543 } |
2544 | |
2545 bool G1CollectedHeap::is_in(const void* p) const { | |
20377
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|
2546 if (_hrm.reserved().contains(p)) { |
20337 | 2547 // Given that we know that p is in the reserved space, |
4708 | 2548 // heap_region_containing_raw() should successfully |
2549 // return the containing region. | |
2550 HeapRegion* hr = heap_region_containing_raw(p); | |
342 | 2551 return hr->is_in(p); |
2552 } else { | |
6725
da91efe96a93
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|
2553 return false; |
342 | 2554 } |
2555 } | |
2556 | |
20337 | 2557 #ifdef ASSERT |
2558 bool G1CollectedHeap::is_in_exact(const void* p) const { | |
2559 bool contains = reserved_region().contains(p); | |
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diff
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|
2560 bool available = _hrm.is_available(addr_to_region((HeapWord*)p)); |
20337 | 2561 if (contains && available) { |
2562 return true; | |
2563 } else { | |
2564 return false; | |
2565 } | |
2566 } | |
2567 #endif | |
2568 | |
342 | 2569 // Iteration functions. |
2570 | |
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diff
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|
2571 // Applies an ExtendedOopClosure onto all references of objects within a HeapRegion. |
342 | 2572 |
2573 class IterateOopClosureRegionClosure: public HeapRegionClosure { | |
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|
2574 ExtendedOopClosure* _cl; |
342 | 2575 public: |
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diff
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|
2576 IterateOopClosureRegionClosure(ExtendedOopClosure* cl) : _cl(cl) {} |
342 | 2577 bool doHeapRegion(HeapRegion* r) { |
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
2578 if (!r->continuesHumongous()) { |
342 | 2579 r->oop_iterate(_cl); |
2580 } | |
2581 return false; | |
2582 } | |
2583 }; | |
2584 | |
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|
2585 void G1CollectedHeap::oop_iterate(ExtendedOopClosure* cl) { |
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|
2586 IterateOopClosureRegionClosure blk(cl); |
3766 | 2587 heap_region_iterate(&blk); |
342 | 2588 } |
2589 | |
2590 // Iterates an ObjectClosure over all objects within a HeapRegion. | |
2591 | |
2592 class IterateObjectClosureRegionClosure: public HeapRegionClosure { | |
2593 ObjectClosure* _cl; | |
2594 public: | |
2595 IterateObjectClosureRegionClosure(ObjectClosure* cl) : _cl(cl) {} | |
2596 bool doHeapRegion(HeapRegion* r) { | |
2597 if (! r->continuesHumongous()) { | |
2598 r->object_iterate(_cl); | |
2599 } | |
2600 return false; | |
2601 } | |
2602 }; | |
2603 | |
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|
2604 void G1CollectedHeap::object_iterate(ObjectClosure* cl) { |
342 | 2605 IterateObjectClosureRegionClosure blk(cl); |
3766 | 2606 heap_region_iterate(&blk); |
342 | 2607 } |
2608 | |
2609 // Calls a SpaceClosure on a HeapRegion. | |
2610 | |
2611 class SpaceClosureRegionClosure: public HeapRegionClosure { | |
2612 SpaceClosure* _cl; | |
2613 public: | |
2614 SpaceClosureRegionClosure(SpaceClosure* cl) : _cl(cl) {} | |
2615 bool doHeapRegion(HeapRegion* r) { | |
2616 _cl->do_space(r); | |
2617 return false; | |
2618 } | |
2619 }; | |
2620 | |
2621 void G1CollectedHeap::space_iterate(SpaceClosure* cl) { | |
2622 SpaceClosureRegionClosure blk(cl); | |
3766 | 2623 heap_region_iterate(&blk); |
342 | 2624 } |
2625 | |
3766 | 2626 void G1CollectedHeap::heap_region_iterate(HeapRegionClosure* cl) const { |
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|
2627 _hrm.iterate(cl); |
342 | 2628 } |
2629 | |
2630 void | |
2631 G1CollectedHeap::heap_region_par_iterate_chunked(HeapRegionClosure* cl, | |
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|
2632 uint worker_id, |
20336
6701abbc4441
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20335
diff
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|
2633 uint num_workers, |
6701abbc4441
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|
2634 jint claim_value) const { |
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|
2635 _hrm.par_iterate(cl, worker_id, num_workers, claim_value); |
355 | 2636 } |
2637 | |
390 | 2638 class ResetClaimValuesClosure: public HeapRegionClosure { |
2639 public: | |
2640 bool doHeapRegion(HeapRegion* r) { | |
2641 r->set_claim_value(HeapRegion::InitialClaimValue); | |
2642 return false; | |
2643 } | |
2644 }; | |
2645 | |
4783
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2646 void G1CollectedHeap::reset_heap_region_claim_values() { |
390 | 2647 ResetClaimValuesClosure blk; |
2648 heap_region_iterate(&blk); | |
2649 } | |
2650 | |
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2651 void G1CollectedHeap::reset_cset_heap_region_claim_values() { |
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2652 ResetClaimValuesClosure blk; |
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2653 collection_set_iterate(&blk); |
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2654 } |
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2655 |
355 | 2656 #ifdef ASSERT |
2657 // This checks whether all regions in the heap have the correct claim | |
2658 // value. I also piggy-backed on this a check to ensure that the | |
2659 // humongous_start_region() information on "continues humongous" | |
2660 // regions is correct. | |
2661 | |
2662 class CheckClaimValuesClosure : public HeapRegionClosure { | |
2663 private: | |
2664 jint _claim_value; | |
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2665 uint _failures; |
355 | 2666 HeapRegion* _sh_region; |
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2667 |
355 | 2668 public: |
2669 CheckClaimValuesClosure(jint claim_value) : | |
2670 _claim_value(claim_value), _failures(0), _sh_region(NULL) { } | |
2671 bool doHeapRegion(HeapRegion* r) { | |
2672 if (r->claim_value() != _claim_value) { | |
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2673 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
355 | 2674 "claim value = %d, should be %d", |
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2675 HR_FORMAT_PARAMS(r), |
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2676 r->claim_value(), _claim_value); |
355 | 2677 ++_failures; |
2678 } | |
2679 if (!r->isHumongous()) { | |
2680 _sh_region = NULL; | |
2681 } else if (r->startsHumongous()) { | |
2682 _sh_region = r; | |
2683 } else if (r->continuesHumongous()) { | |
2684 if (r->humongous_start_region() != _sh_region) { | |
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2685 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
355 | 2686 "HS = "PTR_FORMAT", should be "PTR_FORMAT, |
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2687 HR_FORMAT_PARAMS(r), |
355 | 2688 r->humongous_start_region(), |
2689 _sh_region); | |
2690 ++_failures; | |
342 | 2691 } |
2692 } | |
355 | 2693 return false; |
2694 } | |
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2695 uint failures() { return _failures; } |
355 | 2696 }; |
2697 | |
2698 bool G1CollectedHeap::check_heap_region_claim_values(jint claim_value) { | |
2699 CheckClaimValuesClosure cl(claim_value); | |
2700 heap_region_iterate(&cl); | |
2701 return cl.failures() == 0; | |
2702 } | |
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2703 |
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2704 class CheckClaimValuesInCSetHRClosure: public HeapRegionClosure { |
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2705 private: |
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2706 jint _claim_value; |
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2707 uint _failures; |
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2708 |
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2709 public: |
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2710 CheckClaimValuesInCSetHRClosure(jint claim_value) : |
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2711 _claim_value(claim_value), _failures(0) { } |
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2712 |
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2713 uint failures() { return _failures; } |
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2714 |
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2715 bool doHeapRegion(HeapRegion* hr) { |
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2716 assert(hr->in_collection_set(), "how?"); |
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2717 assert(!hr->isHumongous(), "H-region in CSet"); |
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2718 if (hr->claim_value() != _claim_value) { |
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2719 gclog_or_tty->print_cr("CSet Region " HR_FORMAT ", " |
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2720 "claim value = %d, should be %d", |
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2721 HR_FORMAT_PARAMS(hr), |
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2722 hr->claim_value(), _claim_value); |
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2723 _failures += 1; |
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|
2724 } |
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2725 return false; |
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|
2726 } |
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|
2727 }; |
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2728 |
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|
2729 bool G1CollectedHeap::check_cset_heap_region_claim_values(jint claim_value) { |
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2730 CheckClaimValuesInCSetHRClosure cl(claim_value); |
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2731 collection_set_iterate(&cl); |
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2732 return cl.failures() == 0; |
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2733 } |
355 | 2734 #endif // ASSERT |
342 | 2735 |
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2736 // Clear the cached CSet starting regions and (more importantly) |
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2737 // the time stamps. Called when we reset the GC time stamp. |
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2738 void G1CollectedHeap::clear_cset_start_regions() { |
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2739 assert(_worker_cset_start_region != NULL, "sanity"); |
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2740 assert(_worker_cset_start_region_time_stamp != NULL, "sanity"); |
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2741 |
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2742 int n_queues = MAX2((int)ParallelGCThreads, 1); |
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2743 for (int i = 0; i < n_queues; i++) { |
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2744 _worker_cset_start_region[i] = NULL; |
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2745 _worker_cset_start_region_time_stamp[i] = 0; |
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2746 } |
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|
2747 } |
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2748 |
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2749 // Given the id of a worker, obtain or calculate a suitable |
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2750 // 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
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17833
diff
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|
2751 HeapRegion* G1CollectedHeap::start_cset_region_for_worker(uint worker_i) { |
4709
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2752 assert(get_gc_time_stamp() > 0, "should have been updated by now"); |
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2753 |
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|
2754 HeapRegion* result = NULL; |
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|
2755 unsigned gc_time_stamp = get_gc_time_stamp(); |
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2756 |
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|
2757 if (_worker_cset_start_region_time_stamp[worker_i] == gc_time_stamp) { |
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2758 // Cached starting region for current worker was set |
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2759 // during the current pause - so it's valid. |
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2760 // Note: the cached starting heap region may be NULL |
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2761 // (when the collection set is empty). |
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|
2762 result = _worker_cset_start_region[worker_i]; |
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2763 assert(result == NULL || result->in_collection_set(), "sanity"); |
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2764 return result; |
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|
2765 } |
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|
2766 |
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2767 // The cached entry was not valid so let's calculate |
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2768 // a suitable starting heap region for this worker. |
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2769 |
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2770 // We want the parallel threads to start their collection |
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2771 // set iteration at different collection set regions to |
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|
2772 // avoid contention. |
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|
2773 // If we have: |
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|
2774 // n collection set regions |
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|
2775 // p threads |
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|
2776 // Then thread t will start at region floor ((t * n) / p) |
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2777 |
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|
2778 result = g1_policy()->collection_set(); |
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2779 if (G1CollectedHeap::use_parallel_gc_threads()) { |
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2780 uint cs_size = g1_policy()->cset_region_length(); |
4728
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2781 uint active_workers = workers()->active_workers(); |
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2782 assert(UseDynamicNumberOfGCThreads || |
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|
2783 active_workers == workers()->total_workers(), |
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|
2784 "Unless dynamic should use total workers"); |
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|
2785 |
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|
2786 uint end_ind = (cs_size * worker_i) / active_workers; |
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2787 uint start_ind = 0; |
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|
2788 |
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|
2789 if (worker_i > 0 && |
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|
2790 _worker_cset_start_region_time_stamp[worker_i - 1] == gc_time_stamp) { |
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|
2791 // Previous workers starting region is valid |
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|
2792 // so let's iterate from there |
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|
2793 start_ind = (cs_size * (worker_i - 1)) / active_workers; |
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2794 result = _worker_cset_start_region[worker_i - 1]; |
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|
2795 } |
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|
2796 |
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|
2797 for (uint i = start_ind; i < end_ind; i++) { |
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|
2798 result = result->next_in_collection_set(); |
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|
2799 } |
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|
2800 } |
4709
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|
2801 |
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|
2802 // 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
|
2803 // (when the collection set is empty). |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2804 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
|
2805 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
|
2806 "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
|
2807 _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
|
2808 OrderAccess::storestore(); |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2809 _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
|
2810 return result; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2811 } |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2812 |
342 | 2813 void G1CollectedHeap::collection_set_iterate(HeapRegionClosure* cl) { |
2814 HeapRegion* r = g1_policy()->collection_set(); | |
2815 while (r != NULL) { | |
2816 HeapRegion* next = r->next_in_collection_set(); | |
2817 if (cl->doHeapRegion(r)) { | |
2818 cl->incomplete(); | |
2819 return; | |
2820 } | |
2821 r = next; | |
2822 } | |
2823 } | |
2824 | |
2825 void G1CollectedHeap::collection_set_iterate_from(HeapRegion* r, | |
2826 HeapRegionClosure *cl) { | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2827 if (r == NULL) { |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2828 // 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
|
2829 return; |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2830 } |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2831 |
342 | 2832 assert(r->in_collection_set(), |
2833 "Start region must be a member of the collection set."); | |
2834 HeapRegion* cur = r; | |
2835 while (cur != NULL) { | |
2836 HeapRegion* next = cur->next_in_collection_set(); | |
2837 if (cl->doHeapRegion(cur) && false) { | |
2838 cl->incomplete(); | |
2839 return; | |
2840 } | |
2841 cur = next; | |
2842 } | |
2843 cur = g1_policy()->collection_set(); | |
2844 while (cur != r) { | |
2845 HeapRegion* next = cur->next_in_collection_set(); | |
2846 if (cl->doHeapRegion(cur) && false) { | |
2847 cl->incomplete(); | |
2848 return; | |
2849 } | |
2850 cur = next; | |
2851 } | |
2852 } | |
2853 | |
20304
a22acf6d7598
8048112: G1 Full GC needs to support the case when the very first region is not available
tschatzl
parents:
20282
diff
changeset
|
2854 HeapRegion* G1CollectedHeap::next_compaction_region(const HeapRegion* from) const { |
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
2855 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
|
2856 while (result != NULL && result->isHumongous()) { |
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
2857 result = _hrm.next_region_in_heap(result); |
20336
6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
20335
diff
changeset
|
2858 } |
6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
20335
diff
changeset
|
2859 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
|
2860 } |
342 | 2861 |
2862 Space* G1CollectedHeap::space_containing(const void* addr) const { | |
20335
eec72fa4b108
8040722: G1: Clean up usages of heap_region_containing
brutisso
parents:
20334
diff
changeset
|
2863 return heap_region_containing(addr); |
342 | 2864 } |
2865 | |
2866 HeapWord* G1CollectedHeap::block_start(const void* addr) const { | |
2867 Space* sp = space_containing(addr); | |
20335
eec72fa4b108
8040722: G1: Clean up usages of heap_region_containing
brutisso
parents:
20334
diff
changeset
|
2868 return sp->block_start(addr); |
342 | 2869 } |
2870 | |
2871 size_t G1CollectedHeap::block_size(const HeapWord* addr) const { | |
2872 Space* sp = space_containing(addr); | |
2873 return sp->block_size(addr); | |
2874 } | |
2875 | |
2876 bool G1CollectedHeap::block_is_obj(const HeapWord* addr) const { | |
2877 Space* sp = space_containing(addr); | |
2878 return sp->block_is_obj(addr); | |
2879 } | |
2880 | |
2881 bool G1CollectedHeap::supports_tlab_allocation() const { | |
2882 return true; | |
2883 } | |
2884 | |
2885 size_t G1CollectedHeap::tlab_capacity(Thread* ignored) const { | |
17727 | 2886 return (_g1_policy->young_list_target_length() - young_list()->survivor_length()) * HeapRegion::GrainBytes; |
2887 } | |
2888 | |
2889 size_t G1CollectedHeap::tlab_used(Thread* ignored) const { | |
2890 return young_list()->eden_used_bytes(); | |
2891 } | |
2892 | |
2893 // For G1 TLABs should not contain humongous objects, so the maximum TLAB size | |
2894 // must be smaller than the humongous object limit. | |
2895 size_t G1CollectedHeap::max_tlab_size() const { | |
2896 return align_size_down(_humongous_object_threshold_in_words - 1, MinObjAlignment); | |
342 | 2897 } |
2898 | |
2899 size_t G1CollectedHeap::unsafe_max_tlab_alloc(Thread* ignored) const { | |
2900 // Return the remaining space in the cur alloc region, but not less than | |
2901 // the min TLAB size. | |
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2902 |
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2903 // Also, this value can be at most the humongous object threshold, |
10405 | 2904 // since we can't allow tlabs to grow big enough to accommodate |
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2905 // humongous objects. |
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
2906 |
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
2907 HeapRegion* hr = _allocator->mutator_alloc_region(AllocationContext::current())->get(); |
17727 | 2908 size_t max_tlab = max_tlab_size() * wordSize; |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2909 if (hr == NULL) { |
17727 | 2910 return max_tlab; |
342 | 2911 } else { |
17727 | 2912 return MIN2(MAX2(hr->free(), (size_t) MinTLABSize), max_tlab); |
342 | 2913 } |
2914 } | |
2915 | |
2916 size_t G1CollectedHeap::max_capacity() const { | |
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
2917 return _hrm.reserved().byte_size(); |
342 | 2918 } |
2919 | |
2920 jlong G1CollectedHeap::millis_since_last_gc() { | |
2921 // assert(false, "NYI"); | |
2922 return 0; | |
2923 } | |
2924 | |
2925 void G1CollectedHeap::prepare_for_verify() { | |
2926 if (SafepointSynchronize::is_at_safepoint() || ! UseTLAB) { | |
2927 ensure_parsability(false); | |
2928 } | |
2929 g1_rem_set()->prepare_for_verify(); | |
2930 } | |
2931 | |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2932 bool G1CollectedHeap::allocated_since_marking(oop obj, HeapRegion* hr, |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2933 VerifyOption vo) { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2934 switch (vo) { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2935 case VerifyOption_G1UsePrevMarking: |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2936 return hr->obj_allocated_since_prev_marking(obj); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2937 case VerifyOption_G1UseNextMarking: |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2938 return hr->obj_allocated_since_next_marking(obj); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2939 case VerifyOption_G1UseMarkWord: |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2940 return false; |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2941 default: |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2942 ShouldNotReachHere(); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2943 } |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2944 return false; // keep some compilers happy |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2945 } |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2946 |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2947 HeapWord* G1CollectedHeap::top_at_mark_start(HeapRegion* hr, VerifyOption vo) { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2948 switch (vo) { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2949 case VerifyOption_G1UsePrevMarking: return hr->prev_top_at_mark_start(); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2950 case VerifyOption_G1UseNextMarking: return hr->next_top_at_mark_start(); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2951 case VerifyOption_G1UseMarkWord: return NULL; |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2952 default: ShouldNotReachHere(); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2953 } |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2954 return NULL; // keep some compilers happy |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2955 } |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2956 |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2957 bool G1CollectedHeap::is_marked(oop obj, VerifyOption vo) { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2958 switch (vo) { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2959 case VerifyOption_G1UsePrevMarking: return isMarkedPrev(obj); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2960 case VerifyOption_G1UseNextMarking: return isMarkedNext(obj); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2961 case VerifyOption_G1UseMarkWord: return obj->is_gc_marked(); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2962 default: ShouldNotReachHere(); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2963 } |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2964 return false; // keep some compilers happy |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2965 } |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2966 |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2967 const char* G1CollectedHeap::top_at_mark_start_str(VerifyOption vo) { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2968 switch (vo) { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2969 case VerifyOption_G1UsePrevMarking: return "PTAMS"; |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2970 case VerifyOption_G1UseNextMarking: return "NTAMS"; |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2971 case VerifyOption_G1UseMarkWord: return "NONE"; |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2972 default: ShouldNotReachHere(); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2973 } |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2974 return NULL; // keep some compilers happy |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2975 } |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2976 |
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
2977 class VerifyRootsClosure: public OopClosure { |
12080 | 2978 private: |
2979 G1CollectedHeap* _g1h; | |
2980 VerifyOption _vo; | |
2981 bool _failures; | |
2982 public: | |
2983 // _vo == UsePrevMarking -> use "prev" marking information, | |
2984 // _vo == UseNextMarking -> use "next" marking information, | |
2985 // _vo == UseMarkWord -> use mark word from object header. | |
2986 VerifyRootsClosure(VerifyOption vo) : | |
2987 _g1h(G1CollectedHeap::heap()), | |
2988 _vo(vo), | |
2989 _failures(false) { } | |
2990 | |
2991 bool failures() { return _failures; } | |
2992 | |
2993 template <class T> void do_oop_nv(T* p) { | |
2994 T heap_oop = oopDesc::load_heap_oop(p); | |
2995 if (!oopDesc::is_null(heap_oop)) { | |
2996 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
2997 if (_g1h->is_obj_dead_cond(obj, _vo)) { | |
2998 gclog_or_tty->print_cr("Root location "PTR_FORMAT" " | |
2999 "points to dead obj "PTR_FORMAT, p, (void*) obj); | |
3000 if (_vo == VerifyOption_G1UseMarkWord) { | |
3001 gclog_or_tty->print_cr(" Mark word: "PTR_FORMAT, (void*)(obj->mark())); | |
3002 } | |
3003 obj->print_on(gclog_or_tty); | |
3004 _failures = true; | |
3005 } | |
3006 } | |
3007 } | |
3008 | |
3009 void do_oop(oop* p) { do_oop_nv(p); } | |
3010 void do_oop(narrowOop* p) { do_oop_nv(p); } | |
3011 }; | |
3012 | |
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
3013 class G1VerifyCodeRootOopClosure: public OopClosure { |
12080 | 3014 G1CollectedHeap* _g1h; |
3015 OopClosure* _root_cl; | |
3016 nmethod* _nm; | |
3017 VerifyOption _vo; | |
3018 bool _failures; | |
3019 | |
3020 template <class T> void do_oop_work(T* p) { | |
3021 // First verify that this root is live | |
3022 _root_cl->do_oop(p); | |
3023 | |
3024 if (!G1VerifyHeapRegionCodeRoots) { | |
3025 // We're not verifying the code roots attached to heap region. | |
3026 return; | |
3027 } | |
3028 | |
3029 // Don't check the code roots during marking verification in a full GC | |
3030 if (_vo == VerifyOption_G1UseMarkWord) { | |
3031 return; | |
3032 } | |
3033 | |
3034 // Now verify that the current nmethod (which contains p) is | |
3035 // in the code root list of the heap region containing the | |
3036 // object referenced by p. | |
3037 | |
3038 T heap_oop = oopDesc::load_heap_oop(p); | |
3039 if (!oopDesc::is_null(heap_oop)) { | |
3040 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
3041 | |
3042 // Now fetch the region containing the object | |
3043 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
3044 HeapRegionRemSet* hrrs = hr->rem_set(); | |
3045 // Verify that the strong code root list for this region | |
3046 // contains the nmethod | |
3047 if (!hrrs->strong_code_roots_list_contains(_nm)) { | |
3048 gclog_or_tty->print_cr("Code root location "PTR_FORMAT" " | |
3049 "from nmethod "PTR_FORMAT" not in strong " | |
3050 "code roots for region ["PTR_FORMAT","PTR_FORMAT")", | |
3051 p, _nm, hr->bottom(), hr->end()); | |
3052 _failures = true; | |
3053 } | |
3054 } | |
3055 } | |
3056 | |
3057 public: | |
3058 G1VerifyCodeRootOopClosure(G1CollectedHeap* g1h, OopClosure* root_cl, VerifyOption vo): | |
3059 _g1h(g1h), _root_cl(root_cl), _vo(vo), _nm(NULL), _failures(false) {} | |
3060 | |
3061 void do_oop(oop* p) { do_oop_work(p); } | |
3062 void do_oop(narrowOop* p) { do_oop_work(p); } | |
3063 | |
3064 void set_nmethod(nmethod* nm) { _nm = nm; } | |
3065 bool failures() { return _failures; } | |
3066 }; | |
3067 | |
3068 class G1VerifyCodeRootBlobClosure: public CodeBlobClosure { | |
3069 G1VerifyCodeRootOopClosure* _oop_cl; | |
3070 | |
3071 public: | |
3072 G1VerifyCodeRootBlobClosure(G1VerifyCodeRootOopClosure* oop_cl): | |
3073 _oop_cl(oop_cl) {} | |
3074 | |
3075 void do_code_blob(CodeBlob* cb) { | |
3076 nmethod* nm = cb->as_nmethod_or_null(); | |
3077 if (nm != NULL) { | |
3078 _oop_cl->set_nmethod(nm); | |
3079 nm->oops_do(_oop_cl); | |
3080 } | |
3081 } | |
3082 }; | |
3083 | |
3084 class YoungRefCounterClosure : public OopClosure { | |
3085 G1CollectedHeap* _g1h; | |
3086 int _count; | |
3087 public: | |
3088 YoungRefCounterClosure(G1CollectedHeap* g1h) : _g1h(g1h), _count(0) {} | |
3089 void do_oop(oop* p) { if (_g1h->is_in_young(*p)) { _count++; } } | |
3090 void do_oop(narrowOop* p) { ShouldNotReachHere(); } | |
3091 | |
3092 int count() { return _count; } | |
3093 void reset_count() { _count = 0; }; | |
3094 }; | |
3095 | |
3096 class VerifyKlassClosure: public KlassClosure { | |
3097 YoungRefCounterClosure _young_ref_counter_closure; | |
3098 OopClosure *_oop_closure; | |
3099 public: | |
3100 VerifyKlassClosure(G1CollectedHeap* g1h, OopClosure* cl) : _young_ref_counter_closure(g1h), _oop_closure(cl) {} | |
3101 void do_klass(Klass* k) { | |
3102 k->oops_do(_oop_closure); | |
3103 | |
3104 _young_ref_counter_closure.reset_count(); | |
3105 k->oops_do(&_young_ref_counter_closure); | |
3106 if (_young_ref_counter_closure.count() > 0) { | |
3107 guarantee(k->has_modified_oops(), err_msg("Klass %p, has young refs but is not dirty.", k)); | |
3108 } | |
3109 } | |
3110 }; | |
3111 | |
342 | 3112 class VerifyLivenessOopClosure: public OopClosure { |
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3113 G1CollectedHeap* _g1h; |
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3114 VerifyOption _vo; |
342 | 3115 public: |
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3116 VerifyLivenessOopClosure(G1CollectedHeap* g1h, VerifyOption vo): |
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3117 _g1h(g1h), _vo(vo) |
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3118 { } |
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3119 void do_oop(narrowOop *p) { do_oop_work(p); } |
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3120 void do_oop( oop *p) { do_oop_work(p); } |
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3121 |
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3122 template <class T> void do_oop_work(T *p) { |
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3123 oop obj = oopDesc::load_decode_heap_oop(p); |
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3124 guarantee(obj == NULL || !_g1h->is_obj_dead_cond(obj, _vo), |
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3125 "Dead object referenced by a not dead object"); |
342 | 3126 } |
3127 }; | |
3128 | |
3129 class VerifyObjsInRegionClosure: public ObjectClosure { | |
811 | 3130 private: |
342 | 3131 G1CollectedHeap* _g1h; |
3132 size_t _live_bytes; | |
3133 HeapRegion *_hr; | |
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3134 VerifyOption _vo; |
342 | 3135 public: |
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3136 // _vo == UsePrevMarking -> use "prev" marking information, |
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3137 // _vo == UseNextMarking -> use "next" marking information, |
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3138 // _vo == UseMarkWord -> use mark word from object header. |
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3139 VerifyObjsInRegionClosure(HeapRegion *hr, VerifyOption vo) |
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3140 : _live_bytes(0), _hr(hr), _vo(vo) { |
342 | 3141 _g1h = G1CollectedHeap::heap(); |
3142 } | |
3143 void do_object(oop o) { | |
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3144 VerifyLivenessOopClosure isLive(_g1h, _vo); |
342 | 3145 assert(o != NULL, "Huh?"); |
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3146 if (!_g1h->is_obj_dead_cond(o, _vo)) { |
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3147 // If the object is alive according to the mark word, |
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3148 // then verify that the marking information agrees. |
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3149 // Note we can't verify the contra-positive of the |
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3150 // above: if the object is dead (according to the mark |
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3151 // word), it may not be marked, or may have been marked |
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3152 // but has since became dead, or may have been allocated |
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3153 // since the last marking. |
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3154 if (_vo == VerifyOption_G1UseMarkWord) { |
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3155 guarantee(!_g1h->is_obj_dead(o), "mark word and concurrent mark mismatch"); |
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3156 } |
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3157 |
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3158 o->oop_iterate_no_header(&isLive); |
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3159 if (!_hr->obj_allocated_since_prev_marking(o)) { |
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3160 size_t obj_size = o->size(); // Make sure we don't overflow |
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3161 _live_bytes += (obj_size * HeapWordSize); |
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3162 } |
342 | 3163 } |
3164 } | |
3165 size_t live_bytes() { return _live_bytes; } | |
3166 }; | |
3167 | |
3168 class PrintObjsInRegionClosure : public ObjectClosure { | |
3169 HeapRegion *_hr; | |
3170 G1CollectedHeap *_g1; | |
3171 public: | |
3172 PrintObjsInRegionClosure(HeapRegion *hr) : _hr(hr) { | |
3173 _g1 = G1CollectedHeap::heap(); | |
3174 }; | |
3175 | |
3176 void do_object(oop o) { | |
3177 if (o != NULL) { | |
3178 HeapWord *start = (HeapWord *) o; | |
3179 size_t word_sz = o->size(); | |
3180 gclog_or_tty->print("\nPrinting obj "PTR_FORMAT" of size " SIZE_FORMAT | |
3181 " isMarkedPrev %d isMarkedNext %d isAllocSince %d\n", | |
3182 (void*) o, word_sz, | |
3183 _g1->isMarkedPrev(o), | |
3184 _g1->isMarkedNext(o), | |
3185 _hr->obj_allocated_since_prev_marking(o)); | |
3186 HeapWord *end = start + word_sz; | |
3187 HeapWord *cur; | |
3188 int *val; | |
3189 for (cur = start; cur < end; cur++) { | |
3190 val = (int *) cur; | |
3191 gclog_or_tty->print("\t "PTR_FORMAT":"PTR_FORMAT"\n", val, *val); | |
3192 } | |
3193 } | |
3194 } | |
3195 }; | |
3196 | |
3197 class VerifyRegionClosure: public HeapRegionClosure { | |
811 | 3198 private: |
6254
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3199 bool _par; |
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3200 VerifyOption _vo; |
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3201 bool _failures; |
811 | 3202 public: |
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3203 // _vo == UsePrevMarking -> use "prev" marking information, |
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3204 // _vo == UseNextMarking -> use "next" marking information, |
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3205 // _vo == UseMarkWord -> use mark word from object header. |
6008 | 3206 VerifyRegionClosure(bool par, VerifyOption vo) |
3207 : _par(par), | |
3772
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|
3208 _vo(vo), |
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3209 _failures(false) {} |
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|
3210 |
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|
3211 bool failures() { |
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|
3212 return _failures; |
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|
3213 } |
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3214 |
342 | 3215 bool doHeapRegion(HeapRegion* r) { |
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|
3216 if (!r->continuesHumongous()) { |
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|
3217 bool failures = false; |
6008 | 3218 r->verify(_vo, &failures); |
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3219 if (failures) { |
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|
3220 _failures = true; |
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|
3221 } else { |
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|
3222 VerifyObjsInRegionClosure not_dead_yet_cl(r, _vo); |
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|
3223 r->object_iterate(¬_dead_yet_cl); |
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3224 if (_vo != VerifyOption_G1UseNextMarking) { |
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3225 if (r->max_live_bytes() < not_dead_yet_cl.live_bytes()) { |
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|
3226 gclog_or_tty->print_cr("["PTR_FORMAT","PTR_FORMAT"] " |
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|
3227 "max_live_bytes "SIZE_FORMAT" " |
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|
3228 "< calculated "SIZE_FORMAT, |
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|
3229 r->bottom(), r->end(), |
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|
3230 r->max_live_bytes(), |
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|
3231 not_dead_yet_cl.live_bytes()); |
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3232 _failures = true; |
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|
3233 } |
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|
3234 } else { |
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|
3235 // When vo == UseNextMarking we cannot currently do a sanity |
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|
3236 // check on the live bytes as the calculation has not been |
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|
3237 // finalized yet. |
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|
3238 } |
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|
3239 } |
342 | 3240 } |
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|
3241 return false; // stop the region iteration if we hit a failure |
342 | 3242 } |
3243 }; | |
3244 | |
12080 | 3245 // This is the task used for parallel verification of the heap regions |
390 | 3246 |
3247 class G1ParVerifyTask: public AbstractGangTask { | |
3248 private: | |
3249 G1CollectedHeap* _g1h; | |
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|
3250 VerifyOption _vo; |
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|
3251 bool _failures; |
390 | 3252 |
3253 public: | |
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|
3254 // _vo == UsePrevMarking -> use "prev" marking information, |
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3255 // _vo == UseNextMarking -> use "next" marking information, |
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3256 // _vo == UseMarkWord -> use mark word from object header. |
6008 | 3257 G1ParVerifyTask(G1CollectedHeap* g1h, VerifyOption vo) : |
390 | 3258 AbstractGangTask("Parallel verify task"), |
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3259 _g1h(g1h), |
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|
3260 _vo(vo), |
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|
3261 _failures(false) { } |
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|
3262 |
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|
3263 bool failures() { |
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|
3264 return _failures; |
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|
3265 } |
390 | 3266 |
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|
3267 void work(uint worker_id) { |
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|
3268 HandleMark hm; |
6008 | 3269 VerifyRegionClosure blk(true, _vo); |
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|
3270 _g1h->heap_region_par_iterate_chunked(&blk, worker_id, |
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|
3271 _g1h->workers()->active_workers(), |
390 | 3272 HeapRegion::ParVerifyClaimValue); |
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|
3273 if (blk.failures()) { |
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|
3274 _failures = true; |
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|
3275 } |
390 | 3276 } |
3277 }; | |
3278 | |
12080 | 3279 void G1CollectedHeap::verify(bool silent, VerifyOption vo) { |
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3280 if (SafepointSynchronize::is_at_safepoint()) { |
12080 | 3281 assert(Thread::current()->is_VM_thread(), |
3282 "Expected to be executed serially by the VM thread at this point"); | |
3283 | |
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3284 if (!silent) { gclog_or_tty->print("Roots "); } |
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|
3285 VerifyRootsClosure rootsCl(vo); |
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changeset
|
3286 VerifyKlassClosure klassCl(this, &rootsCl); |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
3287 CLDToKlassAndOopClosure cldCl(&klassCl, &rootsCl, false); |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3288 |
3293
1f4413413144
7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
ysr
parents:
3289
diff
changeset
|
3289 // We apply the relevant closures to all the oops in the |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
3290 // system dictionary, class loader data graph, the string table |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
3291 // and the nmethods in the code cache. |
20257
7426d8d76305
8034761: Remove the do_code_roots parameter from process_strong_roots
stefank
parents:
20256
diff
changeset
|
3292 G1VerifyCodeRootOopClosure codeRootsCl(this, &rootsCl, vo); |
7426d8d76305
8034761: Remove the do_code_roots parameter from process_strong_roots
stefank
parents:
20256
diff
changeset
|
3293 G1VerifyCodeRootBlobClosure blobsCl(&codeRootsCl); |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
3294 |
23224
79b13c9a93e8
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
23223
diff
changeset
|
3295 { |
79b13c9a93e8
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
23223
diff
changeset
|
3296 G1RootProcessor root_processor(this); |
79b13c9a93e8
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
23223
diff
changeset
|
3297 root_processor.process_all_roots(&rootsCl, |
79b13c9a93e8
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
23223
diff
changeset
|
3298 &cldCl, |
79b13c9a93e8
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
23223
diff
changeset
|
3299 &blobsCl); |
79b13c9a93e8
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
23223
diff
changeset
|
3300 } |
20257
7426d8d76305
8034761: Remove the do_code_roots parameter from process_strong_roots
stefank
parents:
20256
diff
changeset
|
3301 |
12080 | 3302 bool failures = rootsCl.failures() || codeRootsCl.failures(); |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3303 |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3304 if (vo != VerifyOption_G1UseMarkWord) { |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3305 // If we're verifying during a full GC then the region sets |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3306 // will have been torn down at the start of the GC. Therefore |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3307 // verifying the region sets will fail. So we only verify |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3308 // the region sets when not in a full GC. |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3309 if (!silent) { gclog_or_tty->print("HeapRegionSets "); } |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3310 verify_region_sets(); |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3311 } |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3312 |
2152 | 3313 if (!silent) { gclog_or_tty->print("HeapRegions "); } |
390 | 3314 if (GCParallelVerificationEnabled && ParallelGCThreads > 1) { |
3315 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
3316 "sanity check"); | |
3317 | |
6008 | 3318 G1ParVerifyTask task(this, vo); |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3319 assert(UseDynamicNumberOfGCThreads || |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3320 workers()->active_workers() == workers()->total_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3321 "If not dynamic should be using all the workers"); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3322 int n_workers = workers()->active_workers(); |
390 | 3323 set_par_threads(n_workers); |
3324 workers()->run_task(&task); | |
3325 set_par_threads(0); | |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3326 if (task.failures()) { |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3327 failures = true; |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3328 } |
390 | 3329 |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3330 // Checks that the expected amount of parallel work was done. |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3331 // The implication is that n_workers is > 0. |
390 | 3332 assert(check_heap_region_claim_values(HeapRegion::ParVerifyClaimValue), |
3333 "sanity check"); | |
3334 | |
3335 reset_heap_region_claim_values(); | |
3336 | |
3337 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
3338 "sanity check"); | |
3339 } else { | |
6008 | 3340 VerifyRegionClosure blk(false, vo); |
3766 | 3341 heap_region_iterate(&blk); |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3342 if (blk.failures()) { |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3343 failures = true; |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3344 } |
390 | 3345 } |
2152 | 3346 if (!silent) gclog_or_tty->print("RemSet "); |
342 | 3347 rem_set()->verify(); |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3348 |
17764 | 3349 if (G1StringDedup::is_enabled()) { |
3350 if (!silent) gclog_or_tty->print("StrDedup "); | |
3351 G1StringDedup::verify(); | |
3352 } | |
3353 | |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3354 if (failures) { |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3355 gclog_or_tty->print_cr("Heap:"); |
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3356 // It helps to have the per-region information in the output to |
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3357 // help us track down what went wrong. This is why we call |
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3358 // print_extended_on() instead of print_on(). |
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3359 print_extended_on(gclog_or_tty); |
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17935
diff
changeset
|
3360 gclog_or_tty->cr(); |
1547
fb1a39993f69
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
1545
diff
changeset
|
3361 #ifndef PRODUCT |
1044 | 3362 if (VerifyDuringGC && G1VerifyDuringGCPrintReachable) { |
1388 | 3363 concurrent_mark()->print_reachable("at-verification-failure", |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3364 vo, false /* all */); |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3365 } |
1547
fb1a39993f69
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
1545
diff
changeset
|
3366 #endif |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3367 gclog_or_tty->flush(); |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3368 } |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3369 guarantee(!failures, "there should not have been any failures"); |
342 | 3370 } else { |
17764 | 3371 if (!silent) { |
3372 gclog_or_tty->print("(SKIPPING Roots, HeapRegionSets, HeapRegions, RemSet"); | |
3373 if (G1StringDedup::is_enabled()) { | |
3374 gclog_or_tty->print(", StrDedup"); | |
3375 } | |
3376 gclog_or_tty->print(") "); | |
3377 } | |
342 | 3378 } |
3379 } | |
3380 | |
12080 | 3381 void G1CollectedHeap::verify(bool silent) { |
3382 verify(silent, VerifyOption_G1UsePrevMarking); | |
3383 } | |
3384 | |
3385 double G1CollectedHeap::verify(bool guard, const char* msg) { | |
3386 double verify_time_ms = 0.0; | |
3387 | |
3388 if (guard && total_collections() >= VerifyGCStartAt) { | |
3389 double verify_start = os::elapsedTime(); | |
3390 HandleMark hm; // Discard invalid handles created during verification | |
3391 prepare_for_verify(); | |
3392 Universe::verify(VerifyOption_G1UsePrevMarking, msg); | |
3393 verify_time_ms = (os::elapsedTime() - verify_start) * 1000; | |
3394 } | |
3395 | |
3396 return verify_time_ms; | |
3397 } | |
3398 | |
3399 void G1CollectedHeap::verify_before_gc() { | |
3400 double verify_time_ms = verify(VerifyBeforeGC, " VerifyBeforeGC:"); | |
3401 g1_policy()->phase_times()->record_verify_before_time_ms(verify_time_ms); | |
3402 } | |
3403 | |
3404 void G1CollectedHeap::verify_after_gc() { | |
3405 double verify_time_ms = verify(VerifyAfterGC, " VerifyAfterGC:"); | |
3406 g1_policy()->phase_times()->record_verify_after_time_ms(verify_time_ms); | |
3407 } | |
3408 | |
342 | 3409 class PrintRegionClosure: public HeapRegionClosure { |
3410 outputStream* _st; | |
3411 public: | |
3412 PrintRegionClosure(outputStream* st) : _st(st) {} | |
3413 bool doHeapRegion(HeapRegion* r) { | |
3414 r->print_on(_st); | |
3415 return false; | |
3416 } | |
3417 }; | |
3418 | |
17833
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3419 bool G1CollectedHeap::is_obj_dead_cond(const oop obj, |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3420 const HeapRegion* hr, |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3421 const VerifyOption vo) const { |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3422 switch (vo) { |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3423 case VerifyOption_G1UsePrevMarking: return is_obj_dead(obj, hr); |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3424 case VerifyOption_G1UseNextMarking: return is_obj_ill(obj, hr); |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3425 case VerifyOption_G1UseMarkWord: return !obj->is_gc_marked(); |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3426 default: ShouldNotReachHere(); |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3427 } |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3428 return false; // keep some compilers happy |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3429 } |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3430 |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3431 bool G1CollectedHeap::is_obj_dead_cond(const oop obj, |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3432 const VerifyOption vo) const { |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3433 switch (vo) { |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3434 case VerifyOption_G1UsePrevMarking: return is_obj_dead(obj); |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3435 case VerifyOption_G1UseNextMarking: return is_obj_ill(obj); |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3436 case VerifyOption_G1UseMarkWord: return !obj->is_gc_marked(); |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3437 default: ShouldNotReachHere(); |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3438 } |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3439 return false; // keep some compilers happy |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3440 } |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
tschatzl
parents:
17774
diff
changeset
|
3441 |
342 | 3442 void G1CollectedHeap::print_on(outputStream* st) const { |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3443 st->print(" %-20s", "garbage-first heap"); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3444 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
|
3445 capacity()/K, used_unlocked()/K); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3446 st->print(" [" INTPTR_FORMAT ", " INTPTR_FORMAT ", " INTPTR_FORMAT ")", |
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
3447 _hrm.reserved().start(), |
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
3448 _hrm.reserved().start() + _hrm.length() + HeapRegion::GrainWords, |
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
3449 _hrm.reserved().end()); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3450 st->cr(); |
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3983
diff
changeset
|
3451 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
|
3452 uint young_regions = _young_list->length(); |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3453 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
|
3454 (size_t) young_regions * HeapRegion::GrainBytes / K); |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3455 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
|
3456 st->print("%u survivors (" SIZE_FORMAT "K)", survivor_regions, |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3457 (size_t) survivor_regions * HeapRegion::GrainBytes / K); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3458 st->cr(); |
6863
04155d9c8c76
8000358: G1: metaspace information not printed in PrintHeapAtGC output nor in hs_err file
johnc
parents:
6819
diff
changeset
|
3459 MetaspaceAux::print_on(st); |
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3460 } |
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3461 |
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3462 void G1CollectedHeap::print_extended_on(outputStream* st) const { |
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3463 print_on(st); |
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3464 |
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3465 // Print the per-region information. |
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3466 st->cr(); |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3467 st->print_cr("Heap Regions: (Y=young(eden), SU=young(survivor), " |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3468 "HS=humongous(starts), HC=humongous(continues), " |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
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3469 "CS=collection set, F=free, TS=gc time stamp, " |
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3470 "PTAMS=previous top-at-mark-start, " |
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|
3471 "NTAMS=next top-at-mark-start)"); |
342 | 3472 PrintRegionClosure blk(st); |
3766 | 3473 heap_region_iterate(&blk); |
342 | 3474 } |
3475 | |
9076
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8011872: Include Bit Map addresses in the hs_err files
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|
3476 void G1CollectedHeap::print_on_error(outputStream* st) const { |
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|
3477 this->CollectedHeap::print_on_error(st); |
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|
3478 |
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|
3479 if (_cm != NULL) { |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
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|
3480 st->cr(); |
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|
3481 _cm->print_on_error(st); |
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|
3482 } |
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|
3483 } |
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|
3484 |
342 | 3485 void G1CollectedHeap::print_gc_threads_on(outputStream* st) const { |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
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diff
changeset
|
3486 if (G1CollectedHeap::use_parallel_gc_threads()) { |
1019 | 3487 workers()->print_worker_threads_on(st); |
3488 } | |
3489 _cmThread->print_on(st); | |
342 | 3490 st->cr(); |
1019 | 3491 _cm->print_worker_threads_on(st); |
3492 _cg1r->print_worker_threads_on(st); | |
17764 | 3493 if (G1StringDedup::is_enabled()) { |
3494 G1StringDedup::print_worker_threads_on(st); | |
3495 } | |
342 | 3496 } |
3497 | |
3498 void G1CollectedHeap::gc_threads_do(ThreadClosure* tc) const { | |
1833
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|
3499 if (G1CollectedHeap::use_parallel_gc_threads()) { |
342 | 3500 workers()->threads_do(tc); |
3501 } | |
3502 tc->do_thread(_cmThread); | |
794 | 3503 _cg1r->threads_do(tc); |
17764 | 3504 if (G1StringDedup::is_enabled()) { |
3505 G1StringDedup::threads_do(tc); | |
3506 } | |
342 | 3507 } |
3508 | |
3509 void G1CollectedHeap::print_tracing_info() const { | |
3510 // We'll overload this to mean "trace GC pause statistics." | |
3511 if (TraceGen0Time || TraceGen1Time) { | |
3512 // The "G1CollectorPolicy" is keeping track of these stats, so delegate | |
3513 // to that. | |
3514 g1_policy()->print_tracing_info(); | |
3515 } | |
751 | 3516 if (G1SummarizeRSetStats) { |
342 | 3517 g1_rem_set()->print_summary_info(); |
3518 } | |
1282 | 3519 if (G1SummarizeConcMark) { |
342 | 3520 concurrent_mark()->print_summary_info(); |
3521 } | |
3522 g1_policy()->print_yg_surv_rate_info(); | |
3523 SpecializationStats::print(); | |
3524 } | |
3525 | |
3777
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|
3526 #ifndef PRODUCT |
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|
3527 // Helpful for debugging RSet issues. |
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|
3528 |
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|
3529 class PrintRSetsClosure : public HeapRegionClosure { |
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|
3530 private: |
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|
3531 const char* _msg; |
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|
3532 size_t _occupied_sum; |
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|
3533 |
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|
3534 public: |
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|
3535 bool doHeapRegion(HeapRegion* r) { |
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3536 HeapRegionRemSet* hrrs = r->rem_set(); |
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|
3537 size_t occupied = hrrs->occupied(); |
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|
3538 _occupied_sum += occupied; |
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|
3539 |
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|
3540 gclog_or_tty->print_cr("Printing RSet for region "HR_FORMAT, |
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|
3541 HR_FORMAT_PARAMS(r)); |
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|
3542 if (occupied == 0) { |
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|
3543 gclog_or_tty->print_cr(" RSet is empty"); |
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|
3544 } else { |
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|
3545 hrrs->print(); |
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|
3546 } |
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|
3547 gclog_or_tty->print_cr("----------"); |
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|
3548 return false; |
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changeset
|
3549 } |
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|
3550 |
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|
3551 PrintRSetsClosure(const char* msg) : _msg(msg), _occupied_sum(0) { |
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|
3552 gclog_or_tty->cr(); |
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diff
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|
3553 gclog_or_tty->print_cr("========================================"); |
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17935
diff
changeset
|
3554 gclog_or_tty->print_cr("%s", msg); |
3777
e8b0b0392037
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diff
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|
3555 gclog_or_tty->cr(); |
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|
3556 } |
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changeset
|
3557 |
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diff
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|
3558 ~PrintRSetsClosure() { |
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|
3559 gclog_or_tty->print_cr("Occupied Sum: "SIZE_FORMAT, _occupied_sum); |
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|
3560 gclog_or_tty->print_cr("========================================"); |
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diff
changeset
|
3561 gclog_or_tty->cr(); |
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|
3562 } |
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diff
changeset
|
3563 }; |
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diff
changeset
|
3564 |
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diff
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|
3565 void G1CollectedHeap::print_cset_rsets() { |
e8b0b0392037
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tonyp
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diff
changeset
|
3566 PrintRSetsClosure cl("Printing CSet RSets"); |
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tonyp
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diff
changeset
|
3567 collection_set_iterate(&cl); |
e8b0b0392037
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3774
diff
changeset
|
3568 } |
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diff
changeset
|
3569 |
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diff
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|
3570 void G1CollectedHeap::print_all_rsets() { |
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diff
changeset
|
3571 PrintRSetsClosure cl("Printing All RSets");; |
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tonyp
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diff
changeset
|
3572 heap_region_iterate(&cl); |
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diff
changeset
|
3573 } |
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diff
changeset
|
3574 #endif // PRODUCT |
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diff
changeset
|
3575 |
342 | 3576 G1CollectedHeap* G1CollectedHeap::heap() { |
3577 assert(_sh->kind() == CollectedHeap::G1CollectedHeap, | |
3578 "not a garbage-first heap"); | |
3579 return _g1h; | |
3580 } | |
3581 | |
3582 void G1CollectedHeap::gc_prologue(bool full /* Ignored */) { | |
1245
6484c4ee11cb
6904516: More object array barrier fixes, following up on 6906727
ysr
parents:
1166
diff
changeset
|
3583 // always_do_update_barrier = false; |
342 | 3584 assert(InlineCacheBuffer::is_empty(), "should have cleaned up ICBuffer"); |
3585 // Fill TLAB's and such | |
17727 | 3586 accumulate_statistics_all_tlabs(); |
342 | 3587 ensure_parsability(true); |
12339
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
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12305
diff
changeset
|
3588 |
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
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12305
diff
changeset
|
3589 if (G1SummarizeRSetStats && (G1SummarizeRSetStatsPeriod > 0) && |
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3590 (total_collections() % G1SummarizeRSetStatsPeriod == 0)) { |
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3591 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
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12305
diff
changeset
|
3592 } |
342 | 3593 } |
3594 | |
20445
e5668dcf12e9
8057818: collect allocation context statistics at gc pauses
jcoomes
parents:
20404
diff
changeset
|
3595 void G1CollectedHeap::gc_epilogue(bool full) { |
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 if (G1SummarizeRSetStats && |
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3598 (G1SummarizeRSetStatsPeriod > 0) && |
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3599 // 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
|
3600 ((total_collections() - 1) % G1SummarizeRSetStatsPeriod == 0)) { |
12339
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
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12305
diff
changeset
|
3601 g1_rem_set()->print_periodic_summary_info("After GC RS summary"); |
10372
e72f7eecc96d
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tschatzl
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10327
diff
changeset
|
3602 } |
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10327
diff
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|
3603 |
342 | 3604 // FIXME: what is this about? |
3605 // I'm ignoring the "fill_newgen()" call if "alloc_event_enabled" | |
3606 // is set. | |
22298 | 3607 #if defined(COMPILER2) || INCLUDE_JVMCI |
22294
d86b226e331a
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Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
21143
diff
changeset
|
3608 assert(DerivedPointerTable::is_empty(), "derived pointer present"); |
d86b226e331a
Enable derived oop processing by the GC with JVMCI
Tom Rodriguez <tom.rodriguez@oracle.com>
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21143
diff
changeset
|
3609 #endif |
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6484c4ee11cb
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diff
changeset
|
3610 // always_do_update_barrier = true; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
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3973
diff
changeset
|
3611 |
17727 | 3612 resize_all_tlabs(); |
20445
e5668dcf12e9
8057818: collect allocation context statistics at gc pauses
jcoomes
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20404
diff
changeset
|
3613 allocation_context_stats().update(full); |
17727 | 3614 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
3615 // We have just completed a GC. Update the soft reference |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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3973
diff
changeset
|
3616 // policy with the new heap occupancy |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
3617 Universe::update_heap_info_at_gc(); |
342 | 3618 } |
3619 | |
1973 | 3620 HeapWord* G1CollectedHeap::do_collection_pause(size_t word_size, |
22936 | 3621 uint gc_count_before, |
12113
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
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12082
diff
changeset
|
3622 bool* succeeded, |
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
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12082
diff
changeset
|
3623 GCCause::Cause gc_cause) { |
1973 | 3624 assert_heap_not_locked_and_not_at_safepoint(); |
342 | 3625 g1_policy()->record_stop_world_start(); |
1973 | 3626 VM_G1IncCollectionPause op(gc_count_before, |
3627 word_size, | |
3628 false, /* should_initiate_conc_mark */ | |
3629 g1_policy()->max_pause_time_ms(), | |
12113
f7d3b4387a16
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brutisso
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diff
changeset
|
3630 gc_cause); |
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
3631 |
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
3632 op.set_allocation_context(AllocationContext::current()); |
1973 | 3633 VMThread::execute(&op); |
3634 | |
3635 HeapWord* result = op.result(); | |
3636 bool ret_succeeded = op.prologue_succeeded() && op.pause_succeeded(); | |
3637 assert(result == NULL || ret_succeeded, | |
3638 "the result should be NULL if the VM did not succeed"); | |
3639 *succeeded = ret_succeeded; | |
3640 | |
3641 assert_heap_not_locked(); | |
3642 return result; | |
342 | 3643 } |
3644 | |
3645 void | |
3646 G1CollectedHeap::doConcurrentMark() { | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
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parents:
838
diff
changeset
|
3647 MutexLockerEx x(CGC_lock, Mutex::_no_safepoint_check_flag); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
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parents:
838
diff
changeset
|
3648 if (!_cmThread->in_progress()) { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3649 _cmThread->set_started(); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
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parents:
838
diff
changeset
|
3650 CGC_lock->notify(); |
342 | 3651 } |
3652 } | |
3653 | |
3654 size_t G1CollectedHeap::pending_card_num() { | |
3655 size_t extra_cards = 0; | |
3656 JavaThread *curr = Threads::first(); | |
3657 while (curr != NULL) { | |
3658 DirtyCardQueue& dcq = curr->dirty_card_queue(); | |
3659 extra_cards += dcq.size(); | |
3660 curr = curr->next(); | |
3661 } | |
3662 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
3663 size_t buffer_size = dcqs.buffer_size(); | |
3664 size_t buffer_num = dcqs.completed_buffers_num(); | |
6611 | 3665 |
3666 // PtrQueueSet::buffer_size() and PtrQueue:size() return sizes | |
3667 // in bytes - not the number of 'entries'. We need to convert | |
3668 // into a number of cards. | |
3669 return (buffer_size * buffer_num + extra_cards) / oopSize; | |
342 | 3670 } |
3671 | |
3672 size_t G1CollectedHeap::cards_scanned() { | |
1861 | 3673 return g1_rem_set()->cardsScanned(); |
342 | 3674 } |
3675 | |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
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20304
diff
changeset
|
3676 class RegisterHumongousWithInCSetFastTestClosure : public HeapRegionClosure { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
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20304
diff
changeset
|
3677 private: |
755930f931e3
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tschatzl
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20304
diff
changeset
|
3678 size_t _total_humongous; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
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20304
diff
changeset
|
3679 size_t _candidate_humongous; |
23024
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
3680 |
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
3681 DirtyCardQueue _dcq; |
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
3682 |
23026
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3683 // We don't nominate objects with many remembered set entries, on |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3684 // the assumption that such objects are likely still live. |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3685 bool is_remset_small(HeapRegion* region) const { |
23024
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
3686 HeapRegionRemSet* const rset = region->rem_set(); |
23026
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3687 return G1EagerReclaimHumongousObjectsWithStaleRefs |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3688 ? rset->occupancy_less_or_equal_than(G1RSetSparseRegionEntries) |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3689 : rset->is_empty(); |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3690 } |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3691 |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3692 bool is_typeArray_region(HeapRegion* region) const { |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3693 return oop(region->bottom())->is_typeArray(); |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3694 } |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3695 |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3696 bool humongous_region_is_candidate(G1CollectedHeap* heap, HeapRegion* region) const { |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3697 assert(region->startsHumongous(), "Must start a humongous object"); |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3698 |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3699 // Candidate selection must satisfy the following constraints |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3700 // while concurrent marking is in progress: |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3701 // |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3702 // * In order to maintain SATB invariants, an object must not be |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3703 // reclaimed if it was allocated before the start of marking and |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3704 // has not had its references scanned. Such an object must have |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3705 // its references (including type metadata) scanned to ensure no |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3706 // live objects are missed by the marking process. Objects |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3707 // allocated after the start of concurrent marking don't need to |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3708 // be scanned. |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3709 // |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3710 // * An object must not be reclaimed if it is on the concurrent |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3711 // mark stack. Objects allocated after the start of concurrent |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3712 // marking are never pushed on the mark stack. |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3713 // |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3714 // Nominating only objects allocated after the start of concurrent |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3715 // marking is sufficient to meet both constraints. This may miss |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3716 // some objects that satisfy the constraints, but the marking data |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3717 // structures don't support efficiently performing the needed |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3718 // additional tests or scrubbing of the mark stack. |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3719 // |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3720 // However, we presently only nominate is_typeArray() objects. |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3721 // A humongous object containing references induces remembered |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3722 // set entries on other regions. In order to reclaim such an |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3723 // object, those remembered sets would need to be cleaned up. |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3724 // |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3725 // We also treat is_typeArray() objects specially, allowing them |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3726 // to be reclaimed even if allocated before the start of |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3727 // concurrent mark. For this we rely on mark stack insertion to |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3728 // exclude is_typeArray() objects, preventing reclaiming an object |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3729 // that is in the mark stack. We also rely on the metadata for |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3730 // such objects to be built-in and so ensured to be kept live. |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3731 // Frequent allocation and drop of large binary blobs is an |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3732 // important use case for eager reclaim, and this special handling |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3733 // may reduce needed headroom. |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3734 |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3735 return is_typeArray_region(region) && is_remset_small(region); |
23024
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
3736 } |
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
3737 |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3738 public: |
23024
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
3739 RegisterHumongousWithInCSetFastTestClosure() |
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
3740 : _total_humongous(0), |
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
3741 _candidate_humongous(0), |
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
3742 _dcq(&JavaThread::dirty_card_queue_set()) { |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3743 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3744 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3745 virtual bool doHeapRegion(HeapRegion* r) { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3746 if (!r->startsHumongous()) { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3747 return false; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3748 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3749 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3750 |
23026
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3751 bool is_candidate = humongous_region_is_candidate(g1h, r); |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3752 uint rindex = r->hrm_index(); |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3753 g1h->set_humongous_reclaim_candidate(rindex, is_candidate); |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3754 if (is_candidate) { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3755 _candidate_humongous++; |
23026
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3756 g1h->register_humongous_region_with_in_cset_fast_test(rindex); |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3757 // Is_candidate already filters out humongous object with large remembered sets. |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3758 // If we have a humongous object with a few remembered sets, we simply flush these |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3759 // remembered set entries into the DCQS. That will result in automatic |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3760 // re-evaluation of their remembered set entries during the following evacuation |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3761 // phase. |
23024
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
3762 if (!r->rem_set()->is_empty()) { |
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
3763 guarantee(r->rem_set()->occupancy_less_or_equal_than(G1RSetSparseRegionEntries), |
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
3764 "Found a not-small remembered set here. This is inconsistent with previous assumptions."); |
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
3765 G1SATBCardTableLoggingModRefBS* bs = g1h->g1_barrier_set(); |
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
3766 HeapRegionRemSetIterator hrrs(r->rem_set()); |
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
3767 size_t card_index; |
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
3768 while (hrrs.has_next(card_index)) { |
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
3769 jbyte* card_ptr = (jbyte*)bs->byte_for_index(card_index); |
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
3770 if (*card_ptr != CardTableModRefBS::dirty_card_val()) { |
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
3771 *card_ptr = CardTableModRefBS::dirty_card_val(); |
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
3772 _dcq.enqueue(card_ptr); |
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
3773 } |
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
3774 } |
23569
f3f2f71d2dc8
8139424: SIGSEGV, Problematic frame: # V [libjvm.so+0xd0c0cc] void InstanceKlass::oop_oop_iterate_oop_maps_specialized<true,oopDesc*,MarkAndPushClosure>
dbuck
parents:
23472
diff
changeset
|
3775 assert(hrrs.n_yielded() == r->rem_set()->occupied(), |
f3f2f71d2dc8
8139424: SIGSEGV, Problematic frame: # V [libjvm.so+0xd0c0cc] void InstanceKlass::oop_oop_iterate_oop_maps_specialized<true,oopDesc*,MarkAndPushClosure>
dbuck
parents:
23472
diff
changeset
|
3776 err_msg("Remembered set hash maps out of sync, cur: " SIZE_FORMAT " entries, next: " SIZE_FORMAT " entries", |
f3f2f71d2dc8
8139424: SIGSEGV, Problematic frame: # V [libjvm.so+0xd0c0cc] void InstanceKlass::oop_oop_iterate_oop_maps_specialized<true,oopDesc*,MarkAndPushClosure>
dbuck
parents:
23472
diff
changeset
|
3777 hrrs.n_yielded(), r->rem_set()->occupied())); |
23024
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
3778 r->rem_set()->clear_locked(); |
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
3779 } |
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
3780 assert(r->rem_set()->is_empty(), "At this point any humongous candidate remembered set must be empty."); |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3781 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3782 _total_humongous++; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3783 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3784 return false; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3785 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3786 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3787 size_t total_humongous() const { return _total_humongous; } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3788 size_t candidate_humongous() const { return _candidate_humongous; } |
23024
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
3789 |
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
3790 void flush_rem_set_entries() { _dcq.flush(); } |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3791 }; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3792 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3793 void G1CollectedHeap::register_humongous_regions_with_in_cset_fast_test() { |
23024
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
3794 if (!G1EagerReclaimHumongousObjects) { |
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
3795 g1_policy()->phase_times()->record_fast_reclaim_humongous_stats(0.0, 0, 0); |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3796 return; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3797 } |
23024
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
3798 double time = os::elapsed_counter(); |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3799 |
23026
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
3800 // Collect reclaim candidate information and register candidates with cset. |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3801 RegisterHumongousWithInCSetFastTestClosure cl; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3802 heap_region_iterate(&cl); |
23024
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
3803 |
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
3804 time = ((double)(os::elapsed_counter() - time) / os::elapsed_frequency()) * 1000.0; |
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
3805 g1_policy()->phase_times()->record_fast_reclaim_humongous_stats(time, |
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
3806 cl.total_humongous(), |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3807 cl.candidate_humongous()); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3808 _has_humongous_reclaim_candidates = cl.candidate_humongous() > 0; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3809 |
23024
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
3810 // Finally flush all remembered set entries to re-check into the global DCQS. |
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
3811 cl.flush_rem_set_entries(); |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3812 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
3813 |
342 | 3814 void |
3815 G1CollectedHeap::setup_surviving_young_words() { | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3816 assert(_surviving_young_words == NULL, "pre-condition"); |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3817 uint array_length = g1_policy()->young_cset_region_length(); |
6197 | 3818 _surviving_young_words = NEW_C_HEAP_ARRAY(size_t, (size_t) array_length, mtGC); |
342 | 3819 if (_surviving_young_words == NULL) { |
10161
746b070f5022
8011661: Insufficient memory message says "malloc" when sometimes it should say "mmap"
ccheung
parents:
10099
diff
changeset
|
3820 vm_exit_out_of_memory(sizeof(size_t) * array_length, OOM_MALLOC_ERROR, |
342 | 3821 "Not enough space for young surv words summary."); |
3822 } | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3823 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
|
3824 #ifdef ASSERT |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3825 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
|
3826 assert( _surviving_young_words[i] == 0, "memset above" ); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3827 } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3828 #endif // !ASSERT |
342 | 3829 } |
3830 | |
3831 void | |
3832 G1CollectedHeap::update_surviving_young_words(size_t* surv_young_words) { | |
3833 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
|
3834 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
|
3835 for (uint i = 0; i < array_length; ++i) { |
342 | 3836 _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
|
3837 } |
342 | 3838 } |
3839 | |
3840 void | |
3841 G1CollectedHeap::cleanup_surviving_young_words() { | |
3842 guarantee( _surviving_young_words != NULL, "pre-condition" ); | |
6197 | 3843 FREE_C_HEAP_ARRAY(size_t, _surviving_young_words, mtGC); |
342 | 3844 _surviving_young_words = NULL; |
3845 } | |
3846 | |
23626
8daf136b3218
8145442: Add the facility to verify remembered sets for G1
poonam
parents:
23569
diff
changeset
|
3847 class VerifyRegionRemSetClosure : public HeapRegionClosure { |
8daf136b3218
8145442: Add the facility to verify remembered sets for G1
poonam
parents:
23569
diff
changeset
|
3848 public: |
8daf136b3218
8145442: Add the facility to verify remembered sets for G1
poonam
parents:
23569
diff
changeset
|
3849 bool doHeapRegion(HeapRegion* hr) { |
8daf136b3218
8145442: Add the facility to verify remembered sets for G1
poonam
parents:
23569
diff
changeset
|
3850 if (!hr->continuesHumongous()) { |
8daf136b3218
8145442: Add the facility to verify remembered sets for G1
poonam
parents:
23569
diff
changeset
|
3851 hr->verify_rem_set(); |
8daf136b3218
8145442: Add the facility to verify remembered sets for G1
poonam
parents:
23569
diff
changeset
|
3852 } |
8daf136b3218
8145442: Add the facility to verify remembered sets for G1
poonam
parents:
23569
diff
changeset
|
3853 return false; |
8daf136b3218
8145442: Add the facility to verify remembered sets for G1
poonam
parents:
23569
diff
changeset
|
3854 } |
8daf136b3218
8145442: Add the facility to verify remembered sets for G1
poonam
parents:
23569
diff
changeset
|
3855 }; |
8daf136b3218
8145442: Add the facility to verify remembered sets for G1
poonam
parents:
23569
diff
changeset
|
3856 |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3857 #ifdef ASSERT |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3858 class VerifyCSetClosure: public HeapRegionClosure { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3859 public: |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3860 bool doHeapRegion(HeapRegion* hr) { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3861 // 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
|
3862 // 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
|
3863 // 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
|
3864 // 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
|
3865 // 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
|
3866 // 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
|
3867 // 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
|
3868 // 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
|
3869 // evacuation failure handling. |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3870 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
|
3871 |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3872 // 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
|
3873 // perform on CSet regions. |
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3874 return false; |
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3875 } |
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3876 }; |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3877 #endif // ASSERT |
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3878 |
1709 | 3879 #if TASKQUEUE_STATS |
3880 void G1CollectedHeap::print_taskqueue_stats_hdr(outputStream* const st) { | |
3881 st->print_raw_cr("GC Task Stats"); | |
3882 st->print_raw("thr "); TaskQueueStats::print_header(1, st); st->cr(); | |
3883 st->print_raw("--- "); TaskQueueStats::print_header(2, st); st->cr(); | |
3884 } | |
3885 | |
3886 void G1CollectedHeap::print_taskqueue_stats(outputStream* const st) const { | |
3887 print_taskqueue_stats_hdr(st); | |
3888 | |
3889 TaskQueueStats totals; | |
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3890 const int n = workers() != NULL ? workers()->total_workers() : 1; |
1709 | 3891 for (int i = 0; i < n; ++i) { |
3892 st->print("%3d ", i); task_queue(i)->stats.print(st); st->cr(); | |
3893 totals += task_queue(i)->stats; | |
3894 } | |
3895 st->print_raw("tot "); totals.print(st); st->cr(); | |
3896 | |
3897 DEBUG_ONLY(totals.verify()); | |
3898 } | |
3899 | |
3900 void G1CollectedHeap::reset_taskqueue_stats() { | |
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3901 const int n = workers() != NULL ? workers()->total_workers() : 1; |
1709 | 3902 for (int i = 0; i < n; ++i) { |
3903 task_queue(i)->stats.reset(); | |
3904 } | |
3905 } | |
3906 #endif // TASKQUEUE_STATS | |
3907 | |
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3908 void G1CollectedHeap::log_gc_header() { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3909 if (!G1Log::fine()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3910 return; |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3911 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3912 |
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
3913 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
|
3914 |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3915 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
|
3916 .append(g1_policy()->gcs_are_young() ? "(young)" : "(mixed)") |
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3917 .append(g1_policy()->during_initial_mark_pause() ? " (initial-mark)" : ""); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3918 |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3919 gclog_or_tty->print("[%s", (const char*)gc_cause_str); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3920 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3921 |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3922 void G1CollectedHeap::log_gc_footer(double pause_time_sec) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3923 if (!G1Log::fine()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3924 return; |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3925 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3926 |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3927 if (G1Log::finer()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3928 if (evacuation_failed()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3929 gclog_or_tty->print(" (to-space exhausted)"); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3930 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3931 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
|
3932 g1_policy()->phase_times()->note_gc_end(); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3933 g1_policy()->phase_times()->print(pause_time_sec); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3934 g1_policy()->print_detailed_heap_transition(); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3935 } else { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3936 if (evacuation_failed()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3937 gclog_or_tty->print("--"); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3938 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3939 g1_policy()->print_heap_transition(); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3940 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
|
3941 } |
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
3942 gclog_or_tty->flush(); |
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3943 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3944 |
1973 | 3945 bool |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3946 G1CollectedHeap::do_collection_pause_at_safepoint(double target_pause_time_ms) { |
2152 | 3947 assert_at_safepoint(true /* should_be_vm_thread */); |
3948 guarantee(!is_gc_active(), "collection is not reentrant"); | |
3949 | |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3950 if (GC_locker::check_active_before_gc()) { |
1973 | 3951 return false; |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3952 } |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3953 |
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
3954 _gc_timer_stw->register_gc_start(); |
10405 | 3955 |
3956 _gc_tracer_stw->report_gc_start(gc_cause(), _gc_timer_stw->gc_start()); | |
3957 | |
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2039
diff
changeset
|
3958 SvcGCMarker sgcm(SvcGCMarker::MINOR); |
2039
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3959 ResourceMark rm; |
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3960 |
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4787
diff
changeset
|
3961 print_heap_before_gc(); |
10405 | 3962 trace_heap_before_gc(_gc_tracer_stw); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3963 |
2152 | 3964 verify_region_sets_optional(); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3965 verify_dirty_young_regions(); |
2152 | 3966 |
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3967 // 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
|
3968 // 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
|
3969 // for the duration of this pause. |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3970 g1_policy()->decide_on_conc_mark_initiation(); |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3971 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3972 // 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
|
3973 assert(!g1_policy()->during_initial_mark_pause() || |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3974 g1_policy()->gcs_are_young(), "sanity"); |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3975 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3976 // 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
|
3977 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
|
3978 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3979 // 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
|
3980 // 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
|
3981 // 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
|
3982 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
|
3983 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3984 // 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
|
3985 { |
10405 | 3986 EvacuationInfo evacuation_info; |
3987 | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3988 if (g1_policy()->during_initial_mark_pause()) { |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3989 // 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
|
3990 // full collection counter. |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
3991 increment_old_marking_cycles_started(); |
10405 | 3992 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
|
3993 } |
10405 | 3994 |
3995 _gc_tracer_stw->report_yc_type(yc_type()); | |
3996 | |
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
3997 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
6030 | 3998 |
23816
6c57a16d0238
8017462: G1: guarantee fails with UseDynamicNumberOfGCThreads
dbuck
parents:
23626
diff
changeset
|
3999 uint active_workers = AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
6c57a16d0238
8017462: G1: guarantee fails with UseDynamicNumberOfGCThreads
dbuck
parents:
23626
diff
changeset
|
4000 workers()->active_workers(), |
6c57a16d0238
8017462: G1: guarantee fails with UseDynamicNumberOfGCThreads
dbuck
parents:
23626
diff
changeset
|
4001 Threads::number_of_non_daemon_threads()); |
6c57a16d0238
8017462: G1: guarantee fails with UseDynamicNumberOfGCThreads
dbuck
parents:
23626
diff
changeset
|
4002 assert(UseDynamicNumberOfGCThreads || |
6c57a16d0238
8017462: G1: guarantee fails with UseDynamicNumberOfGCThreads
dbuck
parents:
23626
diff
changeset
|
4003 active_workers == workers()->total_workers(), |
6c57a16d0238
8017462: G1: guarantee fails with UseDynamicNumberOfGCThreads
dbuck
parents:
23626
diff
changeset
|
4004 "If not dynamic should be using all the workers"); |
6c57a16d0238
8017462: G1: guarantee fails with UseDynamicNumberOfGCThreads
dbuck
parents:
23626
diff
changeset
|
4005 workers()->set_active_workers(active_workers); |
6c57a16d0238
8017462: G1: guarantee fails with UseDynamicNumberOfGCThreads
dbuck
parents:
23626
diff
changeset
|
4006 |
6c57a16d0238
8017462: G1: guarantee fails with UseDynamicNumberOfGCThreads
dbuck
parents:
23626
diff
changeset
|
4007 |
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
|
4008 double pause_start_sec = os::elapsedTime(); |
23223
8f8f1d578796
8074037: Refactor the G1GCPhaseTime logging to make it easier to add new phases
brutisso
parents:
23222
diff
changeset
|
4009 g1_policy()->phase_times()->note_gc_start(active_workers, mark_in_progress()); |
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
4010 log_gc_header(); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4011 |
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
4012 TraceCollectorStats tcs(g1mm()->incremental_collection_counters()); |
3356
78542e2b5e35
7036199: Adding a notification to the implementation of GarbageCollectorMXBeans
fparain
parents:
3323
diff
changeset
|
4013 TraceMemoryManagerStats tms(false /* fullGC */, gc_cause()); |
1089
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
tonyp
parents:
1088
diff
changeset
|
4014 |
2361 | 4015 // If the secondary_free_list is not empty, append it to the |
4016 // free_list. No need to wait for the cleanup operation to finish; | |
4017 // the region allocation code will check the secondary_free_list | |
4018 // and wait if necessary. If the G1StressConcRegionFreeing flag is | |
4019 // set, skip this step so that the region allocation code has to | |
4020 // get entries from the secondary_free_list. | |
2152 | 4021 if (!G1StressConcRegionFreeing) { |
2361 | 4022 append_secondary_free_list_if_not_empty_with_lock(); |
2152 | 4023 } |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4024 |
12080 | 4025 assert(check_young_list_well_formed(), "young list should be well formed"); |
4026 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
4027 "sanity check"); | |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4028 |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4029 // 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
|
4030 // 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
|
4031 // it will be set. |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4032 |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4033 { // 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
|
4034 IsGCActiveMark x; |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4035 |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4036 gc_prologue(false); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4037 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
|
4038 increment_gc_time_stamp(); |
342 | 4039 |
23626
8daf136b3218
8145442: Add the facility to verify remembered sets for G1
poonam
parents:
23569
diff
changeset
|
4040 if (VerifyRememberedSets) { |
8daf136b3218
8145442: Add the facility to verify remembered sets for G1
poonam
parents:
23569
diff
changeset
|
4041 if (!VerifySilently) { |
8daf136b3218
8145442: Add the facility to verify remembered sets for G1
poonam
parents:
23569
diff
changeset
|
4042 gclog_or_tty->print_cr("[Verifying RemSets before GC]"); |
8daf136b3218
8145442: Add the facility to verify remembered sets for G1
poonam
parents:
23569
diff
changeset
|
4043 } |
8daf136b3218
8145442: Add the facility to verify remembered sets for G1
poonam
parents:
23569
diff
changeset
|
4044 VerifyRegionRemSetClosure v_cl; |
8daf136b3218
8145442: Add the facility to verify remembered sets for G1
poonam
parents:
23569
diff
changeset
|
4045 heap_region_iterate(&v_cl); |
8daf136b3218
8145442: Add the facility to verify remembered sets for G1
poonam
parents:
23569
diff
changeset
|
4046 } |
8daf136b3218
8145442: Add the facility to verify remembered sets for G1
poonam
parents:
23569
diff
changeset
|
4047 |
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
|
4048 verify_before_gc(); |
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
4049 check_bitmaps("GC Start"); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4050 |
22298 | 4051 #if defined(COMPILER2) || INCLUDE_JVMCI |
22294
d86b226e331a
Enable derived oop processing by the GC with JVMCI
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
21143
diff
changeset
|
4052 DerivedPointerTable::clear(); |
d86b226e331a
Enable derived oop processing by the GC with JVMCI
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
21143
diff
changeset
|
4053 #endif |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4054 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4055 // Please see comment in g1CollectedHeap.hpp and |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4056 // G1CollectedHeap::ref_processing_init() to see how |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4057 // reference processing currently works in G1. |
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 // Enable discovery in the STW reference processor |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4060 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4061 true /*verify_no_refs*/); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4062 |
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 // We want to temporarily turn off discovery by the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4065 // CM ref processor, if necessary, and turn it back on |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4066 // on again later if we do. Using a scoped |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4067 // NoRefDiscovery object will do this. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4068 NoRefDiscovery no_cm_discovery(ref_processor_cm()); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4069 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4070 // 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
|
4071 // of the collection set!). |
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
4072 _allocator->release_mutator_alloc_region(); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4073 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4074 // We should call this after we retire the mutator alloc |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4075 // region(s) so that all the ALLOC / RETIRE events are generated |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4076 // before the start GC event. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4077 _hr_printer.start_gc(false /* full */, (size_t) total_collections()); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4078 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4079 // 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
|
4080 // 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
|
4081 // 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
|
4082 // |
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4083 // 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
|
4084 // |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4085 // The elapsed time induced by the start time below deliberately elides |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4086 // 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
|
4087 double sample_start_time_sec = os::elapsedTime(); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4088 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4089 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4090 gclog_or_tty->print_cr("\nBefore recording pause start.\nYoung_list:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4091 _young_list->print(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4092 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
|
4093 #endif // YOUNG_LIST_VERBOSE |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4094 |
10098
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
4095 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
|
4096 |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4097 double scan_wait_start = os::elapsedTime(); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4098 // 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
|
4099 // 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
|
4100 // 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
|
4101 // moving them during the GC. |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4102 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
|
4103 double wait_time_ms = 0.0; |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4104 if (waited) { |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4105 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
|
4106 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
|
4107 } |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4108 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
|
4109 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4110 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4111 gclog_or_tty->print_cr("\nAfter recording pause start.\nYoung_list:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4112 _young_list->print(); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4113 #endif // YOUNG_LIST_VERBOSE |
342 | 4114 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4115 if (g1_policy()->during_initial_mark_pause()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4116 concurrent_mark()->checkpointRootsInitialPre(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4117 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4118 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4119 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4120 gclog_or_tty->print_cr("\nBefore choosing collection set.\nYoung_list:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4121 _young_list->print(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4122 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
|
4123 #endif // YOUNG_LIST_VERBOSE |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4124 |
10405 | 4125 g1_policy()->finalize_cset(target_pause_time_ms, evacuation_info); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4126 |
23569
f3f2f71d2dc8
8139424: SIGSEGV, Problematic frame: # V [libjvm.so+0xd0c0cc] void InstanceKlass::oop_oop_iterate_oop_maps_specialized<true,oopDesc*,MarkAndPushClosure>
dbuck
parents:
23472
diff
changeset
|
4127 // Make sure the remembered sets are up to date. This needs to be |
f3f2f71d2dc8
8139424: SIGSEGV, Problematic frame: # V [libjvm.so+0xd0c0cc] void InstanceKlass::oop_oop_iterate_oop_maps_specialized<true,oopDesc*,MarkAndPushClosure>
dbuck
parents:
23472
diff
changeset
|
4128 // done before register_humongous_regions_with_cset(), because the |
f3f2f71d2dc8
8139424: SIGSEGV, Problematic frame: # V [libjvm.so+0xd0c0cc] void InstanceKlass::oop_oop_iterate_oop_maps_specialized<true,oopDesc*,MarkAndPushClosure>
dbuck
parents:
23472
diff
changeset
|
4129 // remembered sets are used there to choose eager reclaim candidates. |
f3f2f71d2dc8
8139424: SIGSEGV, Problematic frame: # V [libjvm.so+0xd0c0cc] void InstanceKlass::oop_oop_iterate_oop_maps_specialized<true,oopDesc*,MarkAndPushClosure>
dbuck
parents:
23472
diff
changeset
|
4130 // If the remembered sets are not up to date we might miss some |
f3f2f71d2dc8
8139424: SIGSEGV, Problematic frame: # V [libjvm.so+0xd0c0cc] void InstanceKlass::oop_oop_iterate_oop_maps_specialized<true,oopDesc*,MarkAndPushClosure>
dbuck
parents:
23472
diff
changeset
|
4131 // entries that need to be handled. |
f3f2f71d2dc8
8139424: SIGSEGV, Problematic frame: # V [libjvm.so+0xd0c0cc] void InstanceKlass::oop_oop_iterate_oop_maps_specialized<true,oopDesc*,MarkAndPushClosure>
dbuck
parents:
23472
diff
changeset
|
4132 g1_rem_set()->cleanupHRRS(); |
f3f2f71d2dc8
8139424: SIGSEGV, Problematic frame: # V [libjvm.so+0xd0c0cc] void InstanceKlass::oop_oop_iterate_oop_maps_specialized<true,oopDesc*,MarkAndPushClosure>
dbuck
parents:
23472
diff
changeset
|
4133 |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4134 register_humongous_regions_with_in_cset_fast_test(); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4135 |
22901
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
4136 assert(check_cset_fast_test(), "Inconsistency in the InCSetState table."); |
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
4137 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4138 _cm->note_start_of_gc(); |
23029
0f8f1250fed5
8078023: verify_no_cset_oops found reclaimed humongous object in SATB buffer
kbarrett
parents:
23026
diff
changeset
|
4139 // We call this after finalize_cset() to |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4140 // ensure that the CSet has been finalized. |
23029
0f8f1250fed5
8078023: verify_no_cset_oops found reclaimed humongous object in SATB buffer
kbarrett
parents:
23026
diff
changeset
|
4141 _cm->verify_no_cset_oops(); |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4142 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4143 if (_hr_printer.is_active()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4144 HeapRegion* hr = g1_policy()->collection_set(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4145 while (hr != NULL) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4146 _hr_printer.cset(hr); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4147 hr = hr->next_in_collection_set(); |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4148 } |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4149 } |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4150 |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
4151 #ifdef ASSERT |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4152 VerifyCSetClosure cl; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4153 collection_set_iterate(&cl); |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
4154 #endif // ASSERT |
1707 | 4155 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4156 setup_surviving_young_words(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4157 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4158 // Initialize the GC alloc regions. |
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
4159 _allocator->init_gc_alloc_regions(evacuation_info); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4160 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4161 // Actually do the work... |
10405 | 4162 evacuate_collection_set(evacuation_info); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4163 |
10405 | 4164 free_collection_set(g1_policy()->collection_set(), evacuation_info); |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4165 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4166 eagerly_reclaim_humongous_regions(); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4167 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4168 g1_policy()->clear_collection_set(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4169 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4170 cleanup_surviving_young_words(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4171 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4172 // Start a new incremental collection set for the next pause. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4173 g1_policy()->start_incremental_cset_building(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4174 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4175 clear_cset_fast_test(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4176 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4177 _young_list->reset_sampled_info(); |
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 // Don't check the whole heap at this point as the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4180 // GC alloc regions from this pause have been tagged |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4181 // as survivors and moved on to the survivor list. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4182 // Survivor regions will fail the !is_young() check. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4183 assert(check_young_list_empty(false /* check_heap */), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4184 "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
|
4185 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4186 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4187 gclog_or_tty->print_cr("Before recording survivors.\nYoung List:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4188 _young_list->print(); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4189 #endif // YOUNG_LIST_VERBOSE |
342 | 4190 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4191 g1_policy()->record_survivor_regions(_young_list->survivor_length(), |
10405 | 4192 _young_list->first_survivor_region(), |
4193 _young_list->last_survivor_region()); | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4194 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4195 _young_list->reset_auxilary_lists(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4196 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4197 if (evacuation_failed()) { |
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
4198 _allocator->set_used(recalculate_used()); |
10405 | 4199 uint n_queues = MAX2((int)ParallelGCThreads, 1); |
4200 for (uint i = 0; i < n_queues; i++) { | |
4201 if (_evacuation_failed_info_array[i].has_failed()) { | |
4202 _gc_tracer_stw->report_evacuation_failed(_evacuation_failed_info_array[i]); | |
4203 } | |
4204 } | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4205 } else { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4206 // The "used" of the the collection set have already been subtracted |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4207 // when they were freed. Add in the bytes evacuated. |
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
4208 _allocator->increase_used(g1_policy()->bytes_copied_during_gc()); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4209 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4210 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4211 if (g1_policy()->during_initial_mark_pause()) { |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4212 // 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
|
4213 // 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
|
4214 // appropriate initialization is done on the CM object. |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4215 concurrent_mark()->checkpointRootsInitialPost(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4216 set_marking_started(); |
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4217 // 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
|
4218 // 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
|
4219 // the current thread has completed its logging output. |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4220 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4221 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4222 allocate_dummy_regions(); |
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
4223 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4224 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4225 gclog_or_tty->print_cr("\nEnd of the pause.\nYoung_list:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4226 _young_list->print(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4227 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
|
4228 #endif // YOUNG_LIST_VERBOSE |
342 | 4229 |
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
4230 _allocator->init_mutator_alloc_region(); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4231 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4232 { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4233 size_t expand_bytes = g1_policy()->expansion_amount(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4234 if (expand_bytes > 0) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4235 size_t bytes_before = capacity(); |
4785 | 4236 // No need for an ergo verbose message here, |
4237 // expansion_amount() does this when it returns a value > 0. | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4238 if (!expand(expand_bytes)) { |
20336
6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
20335
diff
changeset
|
4239 // 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
|
4240 } |
3920
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4241 } |
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4242 } |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4243 |
10405 | 4244 // 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
|
4245 // has just got initialized after the previous CSet was freed. |
23029
0f8f1250fed5
8078023: verify_no_cset_oops found reclaimed humongous object in SATB buffer
kbarrett
parents:
23026
diff
changeset
|
4246 _cm->verify_no_cset_oops(); |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4247 _cm->note_end_of_gc(); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4248 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4249 // 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
|
4250 // 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
|
4251 // 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
|
4252 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
|
4253 double pause_time_ms = (sample_end_time_sec - sample_start_time_sec) * MILLIUNITS; |
10405 | 4254 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
|
4255 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4256 MemoryService::track_memory_usage(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4257 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4258 // 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
|
4259 // update buffers to bring the RSets up-to-date if |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4260 // G1HRRSFlushLogBuffersOnVerify has been set. While scanning |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4261 // 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
|
4262 // regions we just allocated to (i.e., the GC alloc |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4263 // regions). However, during the last GC we called |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4264 // set_saved_mark() on all the GC alloc regions, so card |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4265 // scanning might skip the [saved_mark_word()...top()] area of |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4266 // those regions (i.e., the area we allocated objects into |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4267 // during the last GC). But it shouldn't. Given that |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4268 // saved_mark_word() is conditional on whether the GC time stamp |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4269 // 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
|
4270 // 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
|
4271 // regions and saved_mark_word() will simply return top() for |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4272 // 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
|
4273 // than iterating over the regions and fixing them. In fact, the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4274 // GC time stamp increment here also ensures that |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4275 // saved_mark_word() will return top() between pauses, i.e., |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4276 // during concurrent refinement. So we don't need the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4277 // is_gc_active() check to decided which top to use when |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4278 // scanning cards (see CR 7039627). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4279 increment_gc_time_stamp(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4280 |
23626
8daf136b3218
8145442: Add the facility to verify remembered sets for G1
poonam
parents:
23569
diff
changeset
|
4281 if (VerifyRememberedSets) { |
8daf136b3218
8145442: Add the facility to verify remembered sets for G1
poonam
parents:
23569
diff
changeset
|
4282 if (!VerifySilently) { |
8daf136b3218
8145442: Add the facility to verify remembered sets for G1
poonam
parents:
23569
diff
changeset
|
4283 gclog_or_tty->print_cr("[Verifying RemSets after GC]"); |
8daf136b3218
8145442: Add the facility to verify remembered sets for G1
poonam
parents:
23569
diff
changeset
|
4284 } |
8daf136b3218
8145442: Add the facility to verify remembered sets for G1
poonam
parents:
23569
diff
changeset
|
4285 VerifyRegionRemSetClosure v_cl; |
8daf136b3218
8145442: Add the facility to verify remembered sets for G1
poonam
parents:
23569
diff
changeset
|
4286 heap_region_iterate(&v_cl); |
8daf136b3218
8145442: Add the facility to verify remembered sets for G1
poonam
parents:
23569
diff
changeset
|
4287 } |
8daf136b3218
8145442: Add the facility to verify remembered sets for G1
poonam
parents:
23569
diff
changeset
|
4288 |
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
|
4289 verify_after_gc(); |
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
4290 check_bitmaps("GC End"); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4291 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4292 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4293 ref_processor_stw()->verify_no_references_recorded(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4294 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4295 // 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
|
4296 } |
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4297 |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4298 // 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
|
4299 // 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
|
4300 // 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
|
4301 // RETIRE events are generated before the end GC event. |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4302 _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
|
4303 |
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4304 #ifdef TRACESPINNING |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4305 ParallelTaskTerminator::print_termination_counts(); |
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4306 #endif |
342 | 4307 |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4308 gc_epilogue(false); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4309 } |
6121
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4310 |
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
4311 // 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
|
4312 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
|
4313 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4314 // 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
|
4315 // 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
|
4316 // 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
|
4317 // logging output either. |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4318 |
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
4319 _hrm.verify_optional(); |
6121
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4320 verify_region_sets_optional(); |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4321 |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4322 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
|
4323 TASKQUEUE_STATS_ONLY(reset_taskqueue_stats()); |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4324 |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4325 print_heap_after_gc(); |
10405 | 4326 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
|
4327 |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4328 // 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
|
4329 // 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
|
4330 // 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
|
4331 // before any GC notifications are raised. |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4332 g1mm()->update_sizes(); |
10405 | 4333 |
4334 _gc_tracer_stw->report_evacuation_info(&evacuation_info); | |
4335 _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
|
4336 _gc_timer_stw->register_gc_end(); |
10405 | 4337 _gc_tracer_stw->report_gc_end(_gc_timer_stw->gc_end(), _gc_timer_stw->time_partitions()); |
4338 } | |
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4339 // 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
|
4340 // 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
|
4341 // that came from the pause. |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4342 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4343 if (should_start_conc_mark) { |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4344 // CAUTION: after the doConcurrentMark() call below, |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4345 // the concurrent marking thread(s) could be running |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4346 // concurrently with us. Make sure that anything after |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4347 // 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
|
4348 // 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
|
4349 // not start until the safepoint itself is released in |
20192 | 4350 // SuspendibleThreadSet::desynchronize(). |
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4351 doConcurrentMark(); |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4352 } |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4353 |
1973 | 4354 return true; |
342 | 4355 } |
4356 | |
4357 void G1CollectedHeap::init_for_evac_failure(OopsInHeapRegionClosure* cl) { | |
4358 _drain_in_progress = false; | |
4359 set_evac_failure_closure(cl); | |
6197 | 4360 _evac_failure_scan_stack = new (ResourceObj::C_HEAP, mtGC) GrowableArray<oop>(40, true); |
342 | 4361 } |
4362 | |
4363 void G1CollectedHeap::finalize_for_evac_failure() { | |
4364 assert(_evac_failure_scan_stack != NULL && | |
4365 _evac_failure_scan_stack->length() == 0, | |
4366 "Postcondition"); | |
4367 assert(!_drain_in_progress, "Postcondition"); | |
1045 | 4368 delete _evac_failure_scan_stack; |
342 | 4369 _evac_failure_scan_stack = NULL; |
4370 } | |
4371 | |
4372 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
|
4373 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
|
4374 |
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4375 double remove_self_forwards_start = os::elapsedTime(); |
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4376 |
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4377 G1ParRemoveSelfForwardPtrsTask rsfp_task(this); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4378 |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4379 if (G1CollectedHeap::use_parallel_gc_threads()) { |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4380 set_par_threads(); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4381 workers()->run_task(&rsfp_task); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4382 set_par_threads(0); |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
4383 } else { |
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4384 rsfp_task.work(0); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4385 } |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4386 |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4387 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
|
4388 |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4389 // 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
|
4390 reset_cset_heap_region_claim_values(); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4391 |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4392 assert(check_cset_heap_region_claim_values(HeapRegion::InitialClaimValue), "sanity"); |
342 | 4393 |
4394 // 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
|
4395 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
|
4396 _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
|
4397 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
|
4398 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
|
4399 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
|
4400 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
|
4401 } |
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4402 _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
|
4403 _preserved_marks_of_objs.clear(true); |
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4404 |
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4405 g1_policy()->phase_times()->record_evac_fail_remove_self_forwards((os::elapsedTime() - remove_self_forwards_start) * 1000.0); |
342 | 4406 } |
4407 | |
4408 void G1CollectedHeap::push_on_evac_failure_scan_stack(oop obj) { | |
4409 _evac_failure_scan_stack->push(obj); | |
4410 } | |
4411 | |
4412 void G1CollectedHeap::drain_evac_failure_scan_stack() { | |
4413 assert(_evac_failure_scan_stack != NULL, "precondition"); | |
4414 | |
4415 while (_evac_failure_scan_stack->length() > 0) { | |
4416 oop obj = _evac_failure_scan_stack->pop(); | |
4417 _evac_failure_closure->set_region(heap_region_containing(obj)); | |
4418 obj->oop_iterate_backwards(_evac_failure_closure); | |
4419 } | |
4420 } | |
4421 | |
4422 oop | |
10405 | 4423 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
|
4424 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
|
4425 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
|
4426 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
|
4427 (HeapWord*) old)); |
342 | 4428 markOop m = old->mark(); |
4429 oop forward_ptr = old->forward_to_atomic(old); | |
4430 if (forward_ptr == NULL) { | |
4431 // Forward-to-self succeeded. | |
10405 | 4432 assert(_par_scan_state != NULL, "par scan state"); |
4433 OopsInHeapRegionClosure* cl = _par_scan_state->evac_failure_closure(); | |
4434 uint queue_num = _par_scan_state->queue_num(); | |
4435 | |
4436 _evacuation_failed = true; | |
4437 _evacuation_failed_info_array[queue_num].register_copy_failure(old->size()); | |
342 | 4438 if (_evac_failure_closure != cl) { |
4439 MutexLockerEx x(EvacFailureStack_lock, Mutex::_no_safepoint_check_flag); | |
4440 assert(!_drain_in_progress, | |
4441 "Should only be true while someone holds the lock."); | |
4442 // Set the global evac-failure closure to the current thread's. | |
4443 assert(_evac_failure_closure == NULL, "Or locking has failed."); | |
4444 set_evac_failure_closure(cl); | |
4445 // Now do the common part. | |
4446 handle_evacuation_failure_common(old, m); | |
4447 // Reset to NULL. | |
4448 set_evac_failure_closure(NULL); | |
4449 } else { | |
4450 // The lock is already held, and this is recursive. | |
4451 assert(_drain_in_progress, "This should only be the recursive case."); | |
4452 handle_evacuation_failure_common(old, m); | |
4453 } | |
4454 return old; | |
4455 } 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
|
4456 // 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
|
4457 // 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
|
4458 // 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
|
4459 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
|
4460 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
|
4461 "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
|
4462 (HeapWord*) old, (HeapWord*) forward_ptr)); |
342 | 4463 return forward_ptr; |
4464 } | |
4465 } | |
4466 | |
4467 void G1CollectedHeap::handle_evacuation_failure_common(oop old, markOop m) { | |
4468 preserve_mark_if_necessary(old, m); | |
4469 | |
4470 HeapRegion* r = heap_region_containing(old); | |
4471 if (!r->evacuation_failed()) { | |
4472 r->set_evacuation_failed(true); | |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4473 _hr_printer.evac_failure(r); |
342 | 4474 } |
4475 | |
4476 push_on_evac_failure_scan_stack(old); | |
4477 | |
4478 if (!_drain_in_progress) { | |
4479 // prevent recursion in copy_to_survivor_space() | |
4480 _drain_in_progress = true; | |
4481 drain_evac_failure_scan_stack(); | |
4482 _drain_in_progress = false; | |
4483 } | |
4484 } | |
4485 | |
4486 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
|
4487 assert(evacuation_failed(), "Oversaving!"); |
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4488 // 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
|
4489 // case of a promotion failure. |
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4490 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
|
4491 _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
|
4492 _preserved_marks_of_objs.push(m); |
342 | 4493 } |
4494 } | |
4495 | |
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4496 void G1ParCopyHelper::mark_object(oop obj) { |
20335
eec72fa4b108
8040722: G1: Clean up usages of heap_region_containing
brutisso
parents:
20334
diff
changeset
|
4497 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
|
4498 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4499 // 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
|
4500 _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
|
4501 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4502 |
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4503 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
|
4504 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
|
4505 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
|
4506 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
|
4507 |
20335
eec72fa4b108
8040722: G1: Clean up usages of heap_region_containing
brutisso
parents:
20334
diff
changeset
|
4508 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
|
4509 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
|
4510 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4511 // 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
|
4512 // 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
|
4513 // 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
|
4514 // image which we know should not be changing. |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4515 _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
|
4516 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4517 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4518 template <class T> |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4519 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
|
4520 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
|
4521 _scanned_klass->record_modified_oops(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4522 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4523 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4524 |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4525 template <G1Barrier barrier, G1Mark do_mark_object> |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4526 template <class T> |
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4527 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
|
4528 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
|
4529 |
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4530 if (oopDesc::is_null(heap_oop)) { |
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4531 return; |
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4532 } |
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4533 |
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4534 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
|
4535 |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4536 assert(_worker_id == _par_scan_state->queue_num(), "sanity"); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4537 |
22901
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
4538 const InCSetState state = _g1->in_cset_state(obj); |
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
4539 if (state.is_in_cset()) { |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4540 oop forwardee; |
22895
f2e3f0e1f97d
8064473: Improved handling of age during object copy in G1
sfriberg
parents:
22894
diff
changeset
|
4541 markOop m = obj->mark(); |
f2e3f0e1f97d
8064473: Improved handling of age during object copy in G1
sfriberg
parents:
22894
diff
changeset
|
4542 if (m->is_marked()) { |
f2e3f0e1f97d
8064473: Improved handling of age during object copy in G1
sfriberg
parents:
22894
diff
changeset
|
4543 forwardee = (oop) m->decode_pointer(); |
526 | 4544 } else { |
22901
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
4545 forwardee = _par_scan_state->copy_to_survivor_space(state, obj, m); |
342 | 4546 } |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4547 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
|
4548 oopDesc::encode_store_heap_oop(p, forwardee); |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4549 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
|
4550 // 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
|
4551 // 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
|
4552 mark_forwarded_object(obj, forwardee); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4553 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4554 |
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4555 if (barrier == G1BarrierKlass) { |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4556 do_klass_barrier(p, forwardee); |
342 | 4557 } |
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4558 } else { |
22901
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
4559 if (state.is_humongous()) { |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4560 _g1->set_humongous_is_live(obj); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
4561 } |
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4562 // 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
|
4563 // 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
|
4564 if (do_mark_object == G1MarkFromRoot) { |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4565 mark_object(obj); |
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4566 } |
526 | 4567 } |
4568 | |
17688
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4569 if (barrier == G1BarrierEvac) { |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4570 _par_scan_state->update_rs(_from, p, _worker_id); |
526 | 4571 } |
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4572 } |
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4573 |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4574 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
|
4575 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
|
4576 |
342 | 4577 class G1ParEvacuateFollowersClosure : public VoidClosure { |
4578 protected: | |
4579 G1CollectedHeap* _g1h; | |
4580 G1ParScanThreadState* _par_scan_state; | |
4581 RefToScanQueueSet* _queues; | |
4582 ParallelTaskTerminator* _terminator; | |
4583 | |
4584 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } | |
4585 RefToScanQueueSet* queues() { return _queues; } | |
4586 ParallelTaskTerminator* terminator() { return _terminator; } | |
4587 | |
4588 public: | |
4589 G1ParEvacuateFollowersClosure(G1CollectedHeap* g1h, | |
4590 G1ParScanThreadState* par_scan_state, | |
4591 RefToScanQueueSet* queues, | |
4592 ParallelTaskTerminator* terminator) | |
4593 : _g1h(g1h), _par_scan_state(par_scan_state), | |
4594 _queues(queues), _terminator(terminator) {} | |
4595 | |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4596 void do_void(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4597 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4598 private: |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4599 inline bool offer_termination(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4600 }; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4601 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4602 bool G1ParEvacuateFollowersClosure::offer_termination() { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4603 G1ParScanThreadState* const pss = par_scan_state(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4604 pss->start_term_time(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4605 const bool res = terminator()->offer_termination(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4606 pss->end_term_time(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4607 return res; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4608 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4609 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4610 void G1ParEvacuateFollowersClosure::do_void() { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4611 G1ParScanThreadState* const pss = par_scan_state(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4612 pss->trim_queue(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4613 do { |
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
4614 pss->steal_and_trim_queue(queues()); |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4615 } while (!offer_termination()); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4616 } |
342 | 4617 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4618 class G1KlassScanClosure : public KlassClosure { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4619 G1ParCopyHelper* _closure; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4620 bool _process_only_dirty; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4621 int _count; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4622 public: |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4623 G1KlassScanClosure(G1ParCopyHelper* closure, bool process_only_dirty) |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4624 : _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
|
4625 void do_klass(Klass* klass) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4626 // 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
|
4627 // 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
|
4628 if (!_process_only_dirty || klass->has_modified_oops()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4629 // 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
|
4630 klass->clear_modified_oops(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4631 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4632 // 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
|
4633 // 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
|
4634 _closure->set_scanned_klass(klass); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4635 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4636 klass->oops_do(_closure); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4637 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4638 _closure->set_scanned_klass(NULL); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4639 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4640 _count++; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4641 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4642 }; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4643 |
342 | 4644 class G1ParTask : public AbstractGangTask { |
4645 protected: | |
4646 G1CollectedHeap* _g1h; | |
4647 RefToScanQueueSet *_queues; | |
23224
79b13c9a93e8
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
23223
diff
changeset
|
4648 G1RootProcessor* _root_processor; |
342 | 4649 ParallelTaskTerminator _terminator; |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
4650 uint _n_workers; |
342 | 4651 |
4652 Mutex _stats_lock; | |
4653 Mutex* stats_lock() { return &_stats_lock; } | |
4654 | |
4655 public: | |
23224
79b13c9a93e8
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
23223
diff
changeset
|
4656 G1ParTask(G1CollectedHeap* g1h, RefToScanQueueSet *task_queues, G1RootProcessor* root_processor) |
342 | 4657 : AbstractGangTask("G1 collection"), |
4658 _g1h(g1h), | |
4659 _queues(task_queues), | |
23224
79b13c9a93e8
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
23223
diff
changeset
|
4660 _root_processor(root_processor), |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4661 _terminator(0, _queues), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4662 _stats_lock(Mutex::leaf, "parallel G1 stats lock", true) |
342 | 4663 {} |
4664 | |
4665 RefToScanQueueSet* queues() { return _queues; } | |
4666 | |
4667 RefToScanQueue *work_queue(int i) { | |
4668 return queues()->queue(i); | |
4669 } | |
4670 | |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4671 ParallelTaskTerminator* terminator() { return &_terminator; } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4672 |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4673 virtual void set_for_termination(int active_workers) { |
23224
79b13c9a93e8
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
23223
diff
changeset
|
4674 _root_processor->set_num_workers(active_workers); |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4675 terminator()->reset_for_reuse(active_workers); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4676 _n_workers = active_workers; |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4677 } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4678 |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4679 // Helps out with CLD processing. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4680 // |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4681 // During InitialMark we need to: |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4682 // 1) Scavenge all CLDs for the young GC. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4683 // 2) Mark all objects directly reachable from strong CLDs. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4684 template <G1Mark do_mark_object> |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4685 class G1CLDClosure : public CLDClosure { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4686 G1ParCopyClosure<G1BarrierNone, do_mark_object>* _oop_closure; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4687 G1ParCopyClosure<G1BarrierKlass, do_mark_object> _oop_in_klass_closure; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4688 G1KlassScanClosure _klass_in_cld_closure; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4689 bool _claim; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4690 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4691 public: |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4692 G1CLDClosure(G1ParCopyClosure<G1BarrierNone, do_mark_object>* oop_closure, |
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8049421: G1 Class Unloading after completing a concurrent mark cycle
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changeset
|
4693 bool only_young, bool claim) |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
4694 : _oop_closure(oop_closure), |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
4695 _oop_in_klass_closure(oop_closure->g1(), |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents:
20274
diff
changeset
|
4696 oop_closure->pss(), |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents:
20274
diff
changeset
|
4697 oop_closure->rp()), |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents:
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diff
changeset
|
4698 _klass_in_cld_closure(&_oop_in_klass_closure, only_young), |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
4699 _claim(claim) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4700 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4701 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents:
20274
diff
changeset
|
4702 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4703 void do_cld(ClassLoaderData* cld) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
4704 cld->oops_do(_oop_closure, &_klass_in_cld_closure, _claim); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents:
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diff
changeset
|
4705 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
4706 }; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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parents:
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diff
changeset
|
4707 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
4708 void work(uint worker_id) { |
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
4709 if (worker_id >= _n_workers) return; // no work needed this round |
1611 | 4710 |
23223
8f8f1d578796
8074037: Refactor the G1GCPhaseTime logging to make it easier to add new phases
brutisso
parents:
23222
diff
changeset
|
4711 _g1h->g1_policy()->phase_times()->record_time_secs(G1GCPhaseTimes::GCWorkerStart, worker_id, os::elapsedTime()); |
1611 | 4712 |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4713 { |
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7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4714 ResourceMark rm; |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4715 HandleMark hm; |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4716 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4717 ReferenceProcessor* rp = _g1h->ref_processor_stw(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4718 |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4719 G1ParScanThreadState pss(_g1h, worker_id, rp); |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4720 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, rp); |
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
4721 |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4722 pss.set_evac_failure_closure(&evac_failure_cl); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
4723 |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4724 bool only_young = _g1h->g1_policy()->gcs_are_young(); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4725 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4726 // Non-IM young GC. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4727 G1ParCopyClosure<G1BarrierNone, G1MarkNone> scan_only_root_cl(_g1h, &pss, rp); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4728 G1CLDClosure<G1MarkNone> scan_only_cld_cl(&scan_only_root_cl, |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4729 only_young, // Only process dirty klasses. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4730 false); // No need to claim CLDs. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4731 // IM young GC. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4732 // Strong roots closures. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4733 G1ParCopyClosure<G1BarrierNone, G1MarkFromRoot> scan_mark_root_cl(_g1h, &pss, rp); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4734 G1CLDClosure<G1MarkFromRoot> scan_mark_cld_cl(&scan_mark_root_cl, |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4735 false, // Process all klasses. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4736 true); // Need to claim CLDs. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4737 // Weak roots closures. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4738 G1ParCopyClosure<G1BarrierNone, G1MarkPromotedFromRoot> scan_mark_weak_root_cl(_g1h, &pss, rp); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4739 G1CLDClosure<G1MarkPromotedFromRoot> scan_mark_weak_cld_cl(&scan_mark_weak_root_cl, |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4740 false, // Process all klasses. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4741 true); // Need to claim CLDs. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4742 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4743 OopClosure* strong_root_cl; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4744 OopClosure* weak_root_cl; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4745 CLDClosure* strong_cld_cl; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4746 CLDClosure* weak_cld_cl; |
23224
79b13c9a93e8
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
23223
diff
changeset
|
4747 |
79b13c9a93e8
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
23223
diff
changeset
|
4748 bool trace_metadata = false; |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4749 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4750 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4751 // We also need to mark copied objects. |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4752 strong_root_cl = &scan_mark_root_cl; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4753 strong_cld_cl = &scan_mark_cld_cl; |
20282
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
stefank
parents:
20279
diff
changeset
|
4754 if (ClassUnloadingWithConcurrentMark) { |
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
stefank
parents:
20279
diff
changeset
|
4755 weak_root_cl = &scan_mark_weak_root_cl; |
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
stefank
parents:
20279
diff
changeset
|
4756 weak_cld_cl = &scan_mark_weak_cld_cl; |
23224
79b13c9a93e8
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
23223
diff
changeset
|
4757 trace_metadata = true; |
20282
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
stefank
parents:
20279
diff
changeset
|
4758 } else { |
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
stefank
parents:
20279
diff
changeset
|
4759 weak_root_cl = &scan_mark_root_cl; |
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
stefank
parents:
20279
diff
changeset
|
4760 weak_cld_cl = &scan_mark_cld_cl; |
f3aeae1f9fc5
8048269: Add flag to turn off class unloading after G1 concurrent mark
stefank
parents:
20279
diff
changeset
|
4761 } |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4762 } else { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4763 strong_root_cl = &scan_only_root_cl; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4764 weak_root_cl = &scan_only_root_cl; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4765 strong_cld_cl = &scan_only_cld_cl; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4766 weak_cld_cl = &scan_only_cld_cl; |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4767 } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4768 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4769 pss.start_strong_roots(); |
23224
79b13c9a93e8
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
23223
diff
changeset
|
4770 |
79b13c9a93e8
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
23223
diff
changeset
|
4771 _root_processor->evacuate_roots(strong_root_cl, |
79b13c9a93e8
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
23223
diff
changeset
|
4772 weak_root_cl, |
79b13c9a93e8
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
23223
diff
changeset
|
4773 strong_cld_cl, |
79b13c9a93e8
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
23223
diff
changeset
|
4774 weak_cld_cl, |
79b13c9a93e8
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
23223
diff
changeset
|
4775 trace_metadata, |
79b13c9a93e8
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
23223
diff
changeset
|
4776 worker_id); |
79b13c9a93e8
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
23223
diff
changeset
|
4777 |
79b13c9a93e8
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
23223
diff
changeset
|
4778 G1ParPushHeapRSClosure push_heap_rs_cl(_g1h, &pss); |
79b13c9a93e8
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
23223
diff
changeset
|
4779 _root_processor->scan_remembered_sets(&push_heap_rs_cl, |
79b13c9a93e8
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
23223
diff
changeset
|
4780 weak_root_cl, |
79b13c9a93e8
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
23223
diff
changeset
|
4781 worker_id); |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4782 pss.end_strong_roots(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4783 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4784 { |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4785 double start = os::elapsedTime(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4786 G1ParEvacuateFollowersClosure evac(_g1h, &pss, _queues, &_terminator); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4787 evac.do_void(); |
23223
8f8f1d578796
8074037: Refactor the G1GCPhaseTime logging to make it easier to add new phases
brutisso
parents:
23222
diff
changeset
|
4788 double elapsed_sec = os::elapsedTime() - start; |
8f8f1d578796
8074037: Refactor the G1GCPhaseTime logging to make it easier to add new phases
brutisso
parents:
23222
diff
changeset
|
4789 double term_sec = pss.term_time(); |
8f8f1d578796
8074037: Refactor the G1GCPhaseTime logging to make it easier to add new phases
brutisso
parents:
23222
diff
changeset
|
4790 _g1h->g1_policy()->phase_times()->add_time_secs(G1GCPhaseTimes::ObjCopy, worker_id, elapsed_sec - term_sec); |
8f8f1d578796
8074037: Refactor the G1GCPhaseTime logging to make it easier to add new phases
brutisso
parents:
23222
diff
changeset
|
4791 _g1h->g1_policy()->phase_times()->record_time_secs(G1GCPhaseTimes::Termination, worker_id, term_sec); |
8f8f1d578796
8074037: Refactor the G1GCPhaseTime logging to make it easier to add new phases
brutisso
parents:
23222
diff
changeset
|
4792 _g1h->g1_policy()->phase_times()->record_thread_work_item(G1GCPhaseTimes::Termination, worker_id, pss.term_attempts()); |
5986
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 _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
|
4795 _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
|
4796 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4797 if (ParallelGCVerbose) { |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4798 MutexLocker x(stats_lock()); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4799 pss.print_termination_stats(worker_id); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4800 } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4801 |
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
4802 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
|
4803 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
4804 // 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
|
4805 // 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
|
4806 // "GC Worker Time". |
342 | 4807 } |
23223
8f8f1d578796
8074037: Refactor the G1GCPhaseTime logging to make it easier to add new phases
brutisso
parents:
23222
diff
changeset
|
4808 _g1h->g1_policy()->phase_times()->record_time_secs(G1GCPhaseTimes::GCWorkerEnd, worker_id, os::elapsedTime()); |
342 | 4809 } |
4810 }; | |
4811 | |
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4812 class G1StringSymbolTableUnlinkTask : public AbstractGangTask { |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
4813 private: |
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4814 BoolObjectClosure* _is_alive; |
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|
4815 int _initial_string_table_size; |
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|
4816 int _initial_symbol_table_size; |
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|
4817 |
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|
4818 bool _process_strings; |
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|
4819 int _strings_processed; |
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|
4820 int _strings_removed; |
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|
4821 |
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|
4822 bool _process_symbols; |
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|
4823 int _symbols_processed; |
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|
4824 int _symbols_removed; |
17652
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|
4825 |
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|
4826 bool _do_in_parallel; |
17634
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|
4827 public: |
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|
4828 G1StringSymbolTableUnlinkTask(BoolObjectClosure* is_alive, bool process_strings, bool process_symbols) : |
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4829 AbstractGangTask("String/Symbol Unlinking"), |
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4830 _is_alive(is_alive), |
17652
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4831 _do_in_parallel(G1CollectedHeap::use_parallel_gc_threads()), |
17634
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4832 _process_strings(process_strings), _strings_processed(0), _strings_removed(0), |
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4833 _process_symbols(process_symbols), _symbols_processed(0), _symbols_removed(0) { |
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|
4834 |
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|
4835 _initial_string_table_size = StringTable::the_table()->table_size(); |
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|
4836 _initial_symbol_table_size = SymbolTable::the_table()->table_size(); |
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|
4837 if (process_strings) { |
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|
4838 StringTable::clear_parallel_claimed_index(); |
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|
4839 } |
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|
4840 if (process_symbols) { |
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|
4841 SymbolTable::clear_parallel_claimed_index(); |
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|
4842 } |
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|
4843 } |
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|
4844 |
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|
4845 ~G1StringSymbolTableUnlinkTask() { |
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|
4846 guarantee(!_process_strings || !_do_in_parallel || StringTable::parallel_claimed_index() >= _initial_string_table_size, |
17634
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|
4847 err_msg("claim value "INT32_FORMAT" after unlink less than initial string table size "INT32_FORMAT, |
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|
4848 StringTable::parallel_claimed_index(), _initial_string_table_size)); |
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|
4849 guarantee(!_process_symbols || !_do_in_parallel || SymbolTable::parallel_claimed_index() >= _initial_symbol_table_size, |
17634
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|
4850 err_msg("claim value "INT32_FORMAT" after unlink less than initial symbol table size "INT32_FORMAT, |
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|
4851 SymbolTable::parallel_claimed_index(), _initial_symbol_table_size)); |
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|
4852 |
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|
4853 if (G1TraceStringSymbolTableScrubbing) { |
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|
4854 gclog_or_tty->print_cr("Cleaned string and symbol table, " |
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|
4855 "strings: "SIZE_FORMAT" processed, "SIZE_FORMAT" removed, " |
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|
4856 "symbols: "SIZE_FORMAT" processed, "SIZE_FORMAT" removed", |
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|
4857 strings_processed(), strings_removed(), |
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|
4858 symbols_processed(), symbols_removed()); |
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|
4859 } |
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|
4860 } |
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|
4861 |
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|
4862 void work(uint worker_id) { |
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|
4863 if (_do_in_parallel) { |
17634
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|
4864 int strings_processed = 0; |
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|
4865 int strings_removed = 0; |
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|
4866 int symbols_processed = 0; |
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|
4867 int symbols_removed = 0; |
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|
4868 if (_process_strings) { |
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|
4869 StringTable::possibly_parallel_unlink(_is_alive, &strings_processed, &strings_removed); |
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|
4870 Atomic::add(strings_processed, &_strings_processed); |
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|
4871 Atomic::add(strings_removed, &_strings_removed); |
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|
4872 } |
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|
4873 if (_process_symbols) { |
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|
4874 SymbolTable::possibly_parallel_unlink(&symbols_processed, &symbols_removed); |
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|
4875 Atomic::add(symbols_processed, &_symbols_processed); |
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|
4876 Atomic::add(symbols_removed, &_symbols_removed); |
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|
4877 } |
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diff
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|
4878 } else { |
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|
4879 if (_process_strings) { |
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|
4880 StringTable::unlink(_is_alive, &_strings_processed, &_strings_removed); |
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|
4881 } |
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|
4882 if (_process_symbols) { |
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|
4883 SymbolTable::unlink(&_symbols_processed, &_symbols_removed); |
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|
4884 } |
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changeset
|
4885 } |
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changeset
|
4886 } |
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diff
changeset
|
4887 |
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|
4888 size_t strings_processed() const { return (size_t)_strings_processed; } |
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|
4889 size_t strings_removed() const { return (size_t)_strings_removed; } |
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|
4890 |
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|
4891 size_t symbols_processed() const { return (size_t)_symbols_processed; } |
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|
4892 size_t symbols_removed() const { return (size_t)_symbols_removed; } |
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|
4893 }; |
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|
4894 |
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8049421: G1 Class Unloading after completing a concurrent mark cycle
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|
4895 class G1CodeCacheUnloadingTask VALUE_OBJ_CLASS_SPEC { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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|
4896 private: |
2c6ef90f030a
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diff
changeset
|
4897 static Monitor* _lock; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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changeset
|
4898 |
2c6ef90f030a
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changeset
|
4899 BoolObjectClosure* const _is_alive; |
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8049421: G1 Class Unloading after completing a concurrent mark cycle
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|
4900 const bool _unloading_occurred; |
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changeset
|
4901 const uint _num_workers; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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changeset
|
4902 |
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diff
changeset
|
4903 // Variables used to claim nmethods. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
4904 nmethod* _first_nmethod; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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changeset
|
4905 volatile nmethod* _claimed_nmethod; |
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8049421: G1 Class Unloading after completing a concurrent mark cycle
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changeset
|
4906 |
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changeset
|
4907 // The list of nmethods that need to be processed by the second pass. |
2c6ef90f030a
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|
4908 volatile nmethod* _postponed_list; |
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|
4909 volatile uint _num_entered_barrier; |
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changeset
|
4910 |
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diff
changeset
|
4911 public: |
2c6ef90f030a
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changeset
|
4912 G1CodeCacheUnloadingTask(uint num_workers, BoolObjectClosure* is_alive, bool unloading_occurred) : |
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8049421: G1 Class Unloading after completing a concurrent mark cycle
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|
4913 _is_alive(is_alive), |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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changeset
|
4914 _unloading_occurred(unloading_occurred), |
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diff
changeset
|
4915 _num_workers(num_workers), |
2c6ef90f030a
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changeset
|
4916 _first_nmethod(NULL), |
2c6ef90f030a
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changeset
|
4917 _claimed_nmethod(NULL), |
2c6ef90f030a
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diff
changeset
|
4918 _postponed_list(NULL), |
2c6ef90f030a
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changeset
|
4919 _num_entered_barrier(0) |
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changeset
|
4920 { |
2c6ef90f030a
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changeset
|
4921 nmethod::increase_unloading_clock(); |
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changeset
|
4922 _first_nmethod = CodeCache::alive_nmethod(CodeCache::first()); |
2c6ef90f030a
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|
4923 _claimed_nmethod = (volatile nmethod*)_first_nmethod; |
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changeset
|
4924 } |
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changeset
|
4925 |
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|
4926 ~G1CodeCacheUnloadingTask() { |
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changeset
|
4927 CodeCache::verify_clean_inline_caches(); |
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changeset
|
4928 |
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changeset
|
4929 CodeCache::set_needs_cache_clean(false); |
2c6ef90f030a
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|
4930 guarantee(CodeCache::scavenge_root_nmethods() == NULL, "Must be"); |
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|
4931 |
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|
4932 CodeCache::verify_icholder_relocations(); |
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|
4933 } |
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changeset
|
4934 |
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|
4935 private: |
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|
4936 void add_to_postponed_list(nmethod* nm) { |
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|
4937 nmethod* old; |
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changeset
|
4938 do { |
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8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
4939 old = (nmethod*)_postponed_list; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4940 nm->set_unloading_next(old); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4941 } while ((nmethod*)Atomic::cmpxchg_ptr(nm, &_postponed_list, old) != old); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4942 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
4943 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4944 void clean_nmethod(nmethod* nm) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4945 bool postponed = nm->do_unloading_parallel(_is_alive, _unloading_occurred); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
4946 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4947 if (postponed) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
4948 // This nmethod referred to an nmethod that has not been cleaned/unloaded yet. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4949 add_to_postponed_list(nm); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
4950 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4951 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4952 // Mark that this thread has been cleaned/unloaded. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4953 // After this call, it will be safe to ask if this nmethod was unloaded or not. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4954 nm->set_unloading_clock(nmethod::global_unloading_clock()); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4955 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4956 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4957 void clean_nmethod_postponed(nmethod* nm) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4958 nm->do_unloading_parallel_postponed(_is_alive, _unloading_occurred); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4959 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4960 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4961 static const int MaxClaimNmethods = 16; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
4962 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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20274
diff
changeset
|
4963 void claim_nmethods(nmethod** claimed_nmethods, int *num_claimed_nmethods) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
4964 nmethod* first; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4965 nmethod* last; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
4966 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
4967 do { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
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diff
changeset
|
4968 *num_claimed_nmethods = 0; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
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diff
changeset
|
4969 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4970 first = last = (nmethod*)_claimed_nmethod; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
4971 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4972 if (first != NULL) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
4973 for (int i = 0; i < MaxClaimNmethods; i++) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
4974 last = CodeCache::alive_nmethod(CodeCache::next(last)); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4975 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4976 if (last == NULL) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4977 break; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4978 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4979 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4980 claimed_nmethods[i] = last; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
4981 (*num_claimed_nmethods)++; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4982 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4983 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4984 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4985 } 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
|
4986 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4987 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4988 nmethod* claim_postponed_nmethod() { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4989 nmethod* claim; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4990 nmethod* next; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4991 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4992 do { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4993 claim = (nmethod*)_postponed_list; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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diff
changeset
|
4994 if (claim == NULL) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4995 return NULL; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4996 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4997 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4998 next = claim->unloading_next(); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
4999 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5000 } 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
|
5001 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5002 return claim; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5003 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5004 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5005 public: |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5006 // 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:
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diff
changeset
|
5007 void barrier_mark(uint worker_id) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5008 MonitorLockerEx ml(_lock, Mutex::_no_safepoint_check_flag); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5009 _num_entered_barrier++; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5010 if (_num_entered_barrier == _num_workers) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5011 ml.notify_all(); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5012 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5013 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5014 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5015 // 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
|
5016 // finish their first-pass nmethod cleaning work. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5017 void barrier_wait(uint worker_id) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5018 if (_num_entered_barrier < _num_workers) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5019 MonitorLockerEx ml(_lock, Mutex::_no_safepoint_check_flag); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5020 while (_num_entered_barrier < _num_workers) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5021 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
|
5022 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5023 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5024 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5025 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5026 // 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
|
5027 // 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
|
5028 void work_first_pass(uint worker_id) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5029 // 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
|
5030 if (worker_id == 0 && _first_nmethod != NULL) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5031 clean_nmethod(_first_nmethod); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5032 _first_nmethod = NULL; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5033 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5034 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5035 int num_claimed_nmethods; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5036 nmethod* claimed_nmethods[MaxClaimNmethods]; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5037 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5038 while (true) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5039 claim_nmethods(claimed_nmethods, &num_claimed_nmethods); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5040 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5041 if (num_claimed_nmethods == 0) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5042 break; |
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 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5045 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
|
5046 clean_nmethod(claimed_nmethods[i]); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5047 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5048 } |
20619
b12a2a9b05ca
8056240: Investigate increased GC remark time after class unloading changes in CRM Fuse
stefank
parents:
20571
diff
changeset
|
5049 |
b12a2a9b05ca
8056240: Investigate increased GC remark time after class unloading changes in CRM Fuse
stefank
parents:
20571
diff
changeset
|
5050 // The nmethod cleaning helps out and does the CodeCache part of MetadataOnStackMark. |
b12a2a9b05ca
8056240: Investigate increased GC remark time after class unloading changes in CRM Fuse
stefank
parents:
20571
diff
changeset
|
5051 // Need to retire the buffers now that this thread has stopped cleaning nmethods. |
b12a2a9b05ca
8056240: Investigate increased GC remark time after class unloading changes in CRM Fuse
stefank
parents:
20571
diff
changeset
|
5052 MetadataOnStackMark::retire_buffer_for_thread(Thread::current()); |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5053 } |
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 void work_second_pass(uint worker_id) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5056 nmethod* nm; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5057 // Take care of postponed nmethods. |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5058 while ((nm = claim_postponed_nmethod()) != NULL) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5059 clean_nmethod_postponed(nm); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5060 } |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5061 } |
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 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5064 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
|
5065 |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5066 class G1KlassCleaningTask : public StackObj { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5067 BoolObjectClosure* _is_alive; |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
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5068 volatile jint _clean_klass_tree_claimed; |
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5069 ClassLoaderDataGraphKlassIteratorAtomic _klass_iterator; |
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5070 |
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|
5071 public: |
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|
5072 G1KlassCleaningTask(BoolObjectClosure* is_alive) : |
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5073 _is_alive(is_alive), |
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5074 _clean_klass_tree_claimed(0), |
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5075 _klass_iterator() { |
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|
5076 } |
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|
5077 |
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5078 private: |
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|
5079 bool claim_clean_klass_tree_task() { |
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5080 if (_clean_klass_tree_claimed) { |
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5081 return false; |
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|
5082 } |
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5083 |
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5084 return Atomic::cmpxchg(1, (jint*)&_clean_klass_tree_claimed, 0) == 0; |
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5085 } |
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5086 |
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5087 InstanceKlass* claim_next_klass() { |
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5088 Klass* klass; |
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|
5089 do { |
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5090 klass =_klass_iterator.next_klass(); |
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5091 } while (klass != NULL && !klass->oop_is_instance()); |
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5092 |
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5093 return (InstanceKlass*)klass; |
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5094 } |
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5095 |
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|
5096 public: |
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5097 |
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|
5098 void clean_klass(InstanceKlass* ik) { |
23463
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|
5099 ik->clean_weak_instanceklass_links(_is_alive); |
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5100 |
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5101 if (JvmtiExport::has_redefined_a_class()) { |
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5102 InstanceKlass::purge_previous_versions(ik); |
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5103 } |
20278
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|
5104 } |
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|
5105 |
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|
5106 void work() { |
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|
5107 ResourceMark rm; |
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5108 |
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|
5109 // One worker will clean the subklass/sibling klass tree. |
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|
5110 if (claim_clean_klass_tree_task()) { |
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|
5111 Klass::clean_subklass_tree(_is_alive); |
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5112 } |
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|
5113 |
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|
5114 // All workers will help cleaning the classes, |
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|
5115 InstanceKlass* klass; |
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|
5116 while ((klass = claim_next_klass()) != NULL) { |
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|
5117 clean_klass(klass); |
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|
5118 } |
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|
5119 } |
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|
5120 }; |
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|
5121 |
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|
5122 // To minimize the remark pause times, the tasks below are done in parallel. |
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5123 class G1ParallelCleaningTask : public AbstractGangTask { |
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|
5124 private: |
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|
5125 G1StringSymbolTableUnlinkTask _string_symbol_task; |
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|
5126 G1CodeCacheUnloadingTask _code_cache_task; |
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|
5127 G1KlassCleaningTask _klass_cleaning_task; |
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|
5128 |
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|
5129 public: |
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|
5130 // The constructor is run in the VMThread. |
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|
5131 G1ParallelCleaningTask(BoolObjectClosure* is_alive, bool process_strings, bool process_symbols, uint num_workers, bool unloading_occurred) : |
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|
5132 AbstractGangTask("Parallel Cleaning"), |
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|
5133 _string_symbol_task(is_alive, process_strings, process_symbols), |
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|
5134 _code_cache_task(num_workers, is_alive, unloading_occurred), |
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|
5135 _klass_cleaning_task(is_alive) { |
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|
5136 } |
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|
5137 |
20619
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|
5138 void pre_work_verification() { |
20632
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8064556: G1: ParallelGCThreads=0 may cause assert(!MetadataOnStackMark::has_buffer_for_thread(Thread::current())) failed: Should be empty
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diff
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|
5139 // The VM Thread will have registered Metadata during the single-threaded phase of MetadataStackOnMark. |
706dce84c9df
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diff
changeset
|
5140 assert(Thread::current()->is_VM_thread() |
706dce84c9df
8064556: G1: ParallelGCThreads=0 may cause assert(!MetadataOnStackMark::has_buffer_for_thread(Thread::current())) failed: Should be empty
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|
5141 || !MetadataOnStackMark::has_buffer_for_thread(Thread::current()), "Should be empty"); |
20619
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|
5142 } |
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|
5143 |
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|
5144 void post_work_verification() { |
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|
5145 assert(!MetadataOnStackMark::has_buffer_for_thread(Thread::current()), "Should be empty"); |
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|
5146 } |
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|
5147 |
20278
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|
5148 // The parallel work done by all worker threads. |
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|
5149 void work(uint worker_id) { |
20619
b12a2a9b05ca
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changeset
|
5150 pre_work_verification(); |
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|
5151 |
20278
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|
5152 // Do first pass of code cache cleaning. |
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|
5153 _code_cache_task.work_first_pass(worker_id); |
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|
5154 |
20279 | 5155 // Let the threads mark that the first pass is done. |
20278
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|
5156 _code_cache_task.barrier_mark(worker_id); |
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|
5157 |
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diff
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|
5158 // Clean the Strings and Symbols. |
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changeset
|
5159 _string_symbol_task.work(worker_id); |
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|
5160 |
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|
5161 // Wait for all workers to finish the first code cache cleaning pass. |
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|
5162 _code_cache_task.barrier_wait(worker_id); |
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changeset
|
5163 |
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diff
changeset
|
5164 // Do the second code cache cleaning work, which realize on |
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|
5165 // the liveness information gathered during the first pass. |
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|
5166 _code_cache_task.work_second_pass(worker_id); |
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|
5167 |
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|
5168 // Clean all klasses that were not unloaded. |
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changeset
|
5169 _klass_cleaning_task.work(); |
20619
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|
5170 |
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|
5171 post_work_verification(); |
20278
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|
5172 } |
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|
5173 }; |
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changeset
|
5174 |
2c6ef90f030a
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changeset
|
5175 |
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|
5176 void G1CollectedHeap::parallel_cleaning(BoolObjectClosure* is_alive, |
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|
5177 bool process_strings, |
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|
5178 bool process_symbols, |
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|
5179 bool class_unloading_occurred) { |
17634
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|
5180 uint n_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
20278
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|
5181 workers()->active_workers() : 1); |
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changeset
|
5182 |
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|
5183 G1ParallelCleaningTask g1_unlink_task(is_alive, process_strings, process_symbols, |
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|
5184 n_workers, class_unloading_occurred); |
17634
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changeset
|
5185 if (G1CollectedHeap::use_parallel_gc_threads()) { |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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diff
changeset
|
5186 set_par_threads(n_workers); |
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diff
changeset
|
5187 workers()->run_task(&g1_unlink_task); |
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8027476: Improve performance of Stringtable unlink
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diff
changeset
|
5188 set_par_threads(0); |
5a32d2a3cc1e
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diff
changeset
|
5189 } else { |
5a32d2a3cc1e
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changeset
|
5190 g1_unlink_task.work(0); |
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changeset
|
5191 } |
20278
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|
5192 } |
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|
5193 |
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changeset
|
5194 void G1CollectedHeap::unlink_string_and_symbol_table(BoolObjectClosure* is_alive, |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5195 bool process_strings, bool process_symbols) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5196 { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5197 uint n_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5198 _g1h->workers()->active_workers() : 1); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5199 G1StringSymbolTableUnlinkTask g1_unlink_task(is_alive, process_strings, process_symbols); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5200 if (G1CollectedHeap::use_parallel_gc_threads()) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5201 set_par_threads(n_workers); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5202 workers()->run_task(&g1_unlink_task); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5203 set_par_threads(0); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5204 } else { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5205 g1_unlink_task.work(0); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5206 } |
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5207 } |
17764 | 5208 |
5209 if (G1StringDedup::is_enabled()) { | |
5210 G1StringDedup::unlink(is_alive); | |
5211 } | |
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5212 } |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5213 |
20216
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5214 class G1RedirtyLoggedCardsTask : public AbstractGangTask { |
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5215 private: |
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5216 DirtyCardQueueSet* _queue; |
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5217 public: |
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5218 G1RedirtyLoggedCardsTask(DirtyCardQueueSet* queue) : AbstractGangTask("Redirty Cards"), _queue(queue) { } |
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5219 |
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5220 virtual void work(uint worker_id) { |
23223
8f8f1d578796
8074037: Refactor the G1GCPhaseTime logging to make it easier to add new phases
brutisso
parents:
23222
diff
changeset
|
5221 G1GCPhaseTimes* phase_times = G1CollectedHeap::heap()->g1_policy()->phase_times(); |
8f8f1d578796
8074037: Refactor the G1GCPhaseTime logging to make it easier to add new phases
brutisso
parents:
23222
diff
changeset
|
5222 G1GCParPhaseTimesTracker x(phase_times, G1GCPhaseTimes::RedirtyCards, worker_id); |
20216
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5223 |
20217
6b52700a896b
8040002: Clean up code and code duplication in re-diryting cards for verification
tschatzl
parents:
20216
diff
changeset
|
5224 RedirtyLoggedCardTableEntryClosure cl; |
20216
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5225 if (G1CollectedHeap::heap()->use_parallel_gc_threads()) { |
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5226 _queue->par_apply_closure_to_all_completed_buffers(&cl); |
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5227 } else { |
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5228 _queue->apply_closure_to_all_completed_buffers(&cl); |
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5229 } |
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5230 |
23223
8f8f1d578796
8074037: Refactor the G1GCPhaseTime logging to make it easier to add new phases
brutisso
parents:
23222
diff
changeset
|
5231 phase_times->record_thread_work_item(G1GCPhaseTimes::RedirtyCards, worker_id, cl.num_processed()); |
20216
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5232 } |
17756
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5233 }; |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5234 |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5235 void G1CollectedHeap::redirty_logged_cards() { |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5236 double redirty_logged_cards_start = os::elapsedTime(); |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5237 |
20216
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5238 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
|
5239 _g1h->workers()->active_workers() : 1); |
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5240 |
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5241 G1RedirtyLoggedCardsTask redirty_task(&dirty_card_queue_set()); |
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5242 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
|
5243 if (use_parallel_gc_threads()) { |
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5244 set_par_threads(n_workers); |
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5245 workers()->run_task(&redirty_task); |
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5246 set_par_threads(0); |
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5247 } else { |
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5248 redirty_task.work(0); |
570cb6369f17
8019342: G1: High "Other" time most likely due to card redirtying
tschatzl
parents:
20215
diff
changeset
|
5249 } |
17756
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5250 |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5251 DirtyCardQueueSet& dcq = JavaThread::dirty_card_queue_set(); |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5252 dcq.merge_bufferlists(&dirty_card_queue_set()); |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5253 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
|
5254 |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5255 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
|
5256 } |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5257 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5258 // Weak Reference Processing support |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5259 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5260 // An always "is_alive" closure that is used to preserve referents. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5261 // 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
|
5262 // of referent objects that are pointed to by reference objects |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5263 // discovered by the CM ref processor. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5264 class G1AlwaysAliveClosure: public BoolObjectClosure { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5265 G1CollectedHeap* _g1; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5266 public: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5267 G1AlwaysAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5268 bool do_object_b(oop p) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5269 if (p != NULL) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5270 return true; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5271 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5272 return false; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5273 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5274 }; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5275 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5276 bool G1STWIsAliveClosure::do_object_b(oop p) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5277 // An object is reachable if it is outside the collection set, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5278 // or is inside and copied. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5279 return !_g1->obj_in_cs(p) || p->is_forwarded(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5280 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5281 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5282 // Non Copying Keep Alive closure |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5283 class G1KeepAliveClosure: public OopClosure { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5284 G1CollectedHeap* _g1; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5285 public: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5286 G1KeepAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5287 void do_oop(narrowOop* p) { guarantee(false, "Not needed"); } |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5288 void do_oop(oop* p) { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5289 oop obj = *p; |
20503
fa56205f142c
8057799: Unnecessary NULL check in G1KeepAliveClosure
tonyp
parents:
20494
diff
changeset
|
5290 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
|
5291 |
22901
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
5292 const InCSetState cset_state = _g1->in_cset_state(obj); |
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
5293 if (!cset_state.is_in_cset_or_humongous()) { |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5294 return; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5295 } |
22901
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
5296 if (cset_state.is_in_cset()) { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5297 assert( obj->is_forwarded(), "invariant" ); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5298 *p = obj->forwardee(); |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5299 } else { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5300 assert(!obj->is_forwarded(), "invariant" ); |
22901
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
5301 assert(cset_state.is_humongous(), |
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
5302 err_msg("Only allowed InCSet state is IsHumongous, but is %d", cset_state.value())); |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
5303 _g1->set_humongous_is_live(obj); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5304 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5305 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5306 }; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5307 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5308 // Copying Keep Alive closure - can be called from both |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5309 // serial and parallel code as long as different worker |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5310 // threads utilize different G1ParScanThreadState instances |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5311 // and different queues. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5312 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5313 class G1CopyingKeepAliveClosure: public OopClosure { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5314 G1CollectedHeap* _g1h; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5315 OopClosure* _copy_non_heap_obj_cl; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5316 G1ParScanThreadState* _par_scan_state; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5317 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5318 public: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5319 G1CopyingKeepAliveClosure(G1CollectedHeap* g1h, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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|
5320 OopClosure* non_heap_obj_cl, |
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|
5321 G1ParScanThreadState* pss): |
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diff
changeset
|
5322 _g1h(g1h), |
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|
5323 _copy_non_heap_obj_cl(non_heap_obj_cl), |
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parents:
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|
5324 _par_scan_state(pss) |
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parents:
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diff
changeset
|
5325 {} |
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parents:
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diff
changeset
|
5326 |
4dfb2df418f2
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|
5327 virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
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changeset
|
5328 virtual void do_oop( oop* p) { do_oop_work(p); } |
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changeset
|
5329 |
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diff
changeset
|
5330 template <class T> void do_oop_work(T* p) { |
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|
5331 oop obj = oopDesc::load_decode_heap_oop(p); |
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|
5332 |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
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|
5333 if (_g1h->is_in_cset_or_humongous(obj)) { |
3979
4dfb2df418f2
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|
5334 // If the referent object has been forwarded (either copied |
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diff
changeset
|
5335 // to a new location or to itself in the event of an |
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|
5336 // evacuation failure) then we need to update the reference |
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diff
changeset
|
5337 // field and, if both reference and referent are in the G1 |
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diff
changeset
|
5338 // heap, update the RSet for the referent. |
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parents:
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diff
changeset
|
5339 // |
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diff
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|
5340 // If the referent has not been forwarded then we have to keep |
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|
5341 // it alive by policy. Therefore we have copy the referent. |
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changeset
|
5342 // |
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|
5343 // If the reference field is in the G1 heap then we can push |
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|
5344 // on the PSS queue. When the queue is drained (after each |
4dfb2df418f2
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diff
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|
5345 // phase of reference processing) the object and it's followers |
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diff
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|
5346 // will be copied, the reference field set to point to the |
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|
5347 // 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
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|
5348 // use the the non-heap or metadata closures directly to copy |
10405 | 5349 // the referent object and update the pointer, while avoiding |
3979
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|
5350 // updating the RSet. |
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diff
changeset
|
5351 |
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|
5352 if (_g1h->is_in_g1_reserved(p)) { |
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|
5353 _par_scan_state->push_on_queue(p); |
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|
5354 } else { |
17935
7384f6a12fc1
8038212: Method::is_valid_method() check has performance regression impact for stackwalking
coleenp
parents:
17866
diff
changeset
|
5355 assert(!Metaspace::contains((const void*)p), |
20270
b7d24d2bc8be
8047323: Remove unused _copy_metadata_obj_cl in G1CopyingKeepAliveClosure
stefank
parents:
20257
diff
changeset
|
5356 err_msg("Unexpectedly found a pointer from metadata: " |
6725
da91efe96a93
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|
5357 PTR_FORMAT, p)); |
20305
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tschatzl
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|
5358 _copy_non_heap_obj_cl->do_oop(p); |
3979
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|
5359 } |
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|
5360 } |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
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diff
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|
5361 } |
3979
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parents:
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diff
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|
5362 }; |
4dfb2df418f2
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parents:
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diff
changeset
|
5363 |
4dfb2df418f2
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diff
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|
5364 // Serial drain queue closure. Called as the 'complete_gc' |
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parents:
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|
5365 // closure for each discovered list in some of the |
4dfb2df418f2
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parents:
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diff
changeset
|
5366 // reference processing phases. |
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diff
changeset
|
5367 |
4dfb2df418f2
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|
5368 class G1STWDrainQueueClosure: public VoidClosure { |
4dfb2df418f2
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diff
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|
5369 protected: |
4dfb2df418f2
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parents:
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diff
changeset
|
5370 G1CollectedHeap* _g1h; |
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diff
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|
5371 G1ParScanThreadState* _par_scan_state; |
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diff
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|
5372 |
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diff
changeset
|
5373 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } |
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diff
changeset
|
5374 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5375 public: |
4dfb2df418f2
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parents:
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diff
changeset
|
5376 G1STWDrainQueueClosure(G1CollectedHeap* g1h, G1ParScanThreadState* pss) : |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5377 _g1h(g1h), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5378 _par_scan_state(pss) |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5379 { } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5380 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5381 void do_void() { |
4dfb2df418f2
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parents:
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diff
changeset
|
5382 G1ParScanThreadState* const pss = par_scan_state(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5383 pss->trim_queue(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5384 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5385 }; |
4dfb2df418f2
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parents:
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diff
changeset
|
5386 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5387 // Parallel Reference Processing closures |
4dfb2df418f2
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parents:
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diff
changeset
|
5388 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5389 // Implementation of AbstractRefProcTaskExecutor for parallel reference |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5390 // processing during G1 evacuation pauses. |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5391 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5392 class G1STWRefProcTaskExecutor: public AbstractRefProcTaskExecutor { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5393 private: |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5394 G1CollectedHeap* _g1h; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5395 RefToScanQueueSet* _queues; |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5396 FlexibleWorkGang* _workers; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5397 int _active_workers; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5398 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5399 public: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5400 G1STWRefProcTaskExecutor(G1CollectedHeap* g1h, |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5401 FlexibleWorkGang* workers, |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5402 RefToScanQueueSet *task_queues, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5403 int n_workers) : |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5404 _g1h(g1h), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5405 _queues(task_queues), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5406 _workers(workers), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5407 _active_workers(n_workers) |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5408 { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5409 assert(n_workers > 0, "shouldn't call this otherwise"); |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5410 } |
4dfb2df418f2
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parents:
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diff
changeset
|
5411 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5412 // Executes the given task using concurrent marking worker threads. |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5413 virtual void execute(ProcessTask& task); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5414 virtual void execute(EnqueueTask& task); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5415 }; |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5416 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5417 // Gang task for possibly parallel reference processing |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5418 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5419 class G1STWRefProcTaskProxy: public AbstractGangTask { |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5420 typedef AbstractRefProcTaskExecutor::ProcessTask ProcessTask; |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5421 ProcessTask& _proc_task; |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5422 G1CollectedHeap* _g1h; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5423 RefToScanQueueSet *_task_queues; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5424 ParallelTaskTerminator* _terminator; |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5425 |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5426 public: |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5427 G1STWRefProcTaskProxy(ProcessTask& proc_task, |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5428 G1CollectedHeap* g1h, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5429 RefToScanQueueSet *task_queues, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5430 ParallelTaskTerminator* terminator) : |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5431 AbstractGangTask("Process reference objects in parallel"), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5432 _proc_task(proc_task), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5433 _g1h(g1h), |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5434 _task_queues(task_queues), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5435 _terminator(terminator) |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5436 {} |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5437 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5438 virtual void work(uint worker_id) { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5439 // The reference processing task executed by a single worker. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5440 ResourceMark rm; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5441 HandleMark hm; |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5442 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5443 G1STWIsAliveClosure is_alive(_g1h); |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5444 |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5445 G1ParScanThreadState pss(_g1h, worker_id, NULL); |
3979
4dfb2df418f2
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parents:
3973
diff
changeset
|
5446 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
5447 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5448 pss.set_evac_failure_closure(&evac_failure_cl); |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5449 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5450 G1ParScanExtRootClosure only_copy_non_heap_cl(_g1h, &pss, NULL); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5451 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5452 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
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|
5453 |
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|
5454 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
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|
5455 |
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|
5456 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
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|
5457 // We also need to mark copied objects. |
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|
5458 copy_non_heap_cl = ©_mark_non_heap_cl; |
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|
5459 } |
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diff
changeset
|
5460 |
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|
5461 // Keep alive closure. |
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|
5462 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, &pss); |
3979
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|
5463 |
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diff
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|
5464 // Complete GC closure |
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|
5465 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _task_queues, _terminator); |
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|
5466 |
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|
5467 // Call the reference processing task's work routine. |
4728
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|
5468 _proc_task.work(worker_id, is_alive, keep_alive, drain_queue); |
3979
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|
5469 |
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|
5470 // Note we cannot assert that the refs array is empty here as not all |
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|
5471 // of the processing tasks (specifically phase2 - pp2_work) execute |
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|
5472 // the complete_gc closure (which ordinarily would drain the queue) so |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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|
5473 // the queue may not be empty. |
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diff
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|
5474 } |
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diff
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|
5475 }; |
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diff
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|
5476 |
4dfb2df418f2
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diff
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|
5477 // Driver routine for parallel reference processing. |
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|
5478 // Creates an instance of the ref processing gang |
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diff
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|
5479 // task and has the worker threads execute it. |
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|
5480 void G1STWRefProcTaskExecutor::execute(ProcessTask& proc_task) { |
4dfb2df418f2
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|
5481 assert(_workers != NULL, "Need parallel worker threads."); |
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changeset
|
5482 |
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|
5483 ParallelTaskTerminator terminator(_active_workers, _queues); |
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|
5484 G1STWRefProcTaskProxy proc_task_proxy(proc_task, _g1h, _queues, &terminator); |
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|
5485 |
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|
5486 _g1h->set_par_threads(_active_workers); |
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|
5487 _workers->run_task(&proc_task_proxy); |
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|
5488 _g1h->set_par_threads(0); |
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|
5489 } |
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diff
changeset
|
5490 |
4dfb2df418f2
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|
5491 // Gang task for parallel reference enqueueing. |
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changeset
|
5492 |
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|
5493 class G1STWRefEnqueueTaskProxy: public AbstractGangTask { |
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|
5494 typedef AbstractRefProcTaskExecutor::EnqueueTask EnqueueTask; |
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|
5495 EnqueueTask& _enq_task; |
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parents:
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diff
changeset
|
5496 |
4dfb2df418f2
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|
5497 public: |
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parents:
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diff
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|
5498 G1STWRefEnqueueTaskProxy(EnqueueTask& enq_task) : |
4dfb2df418f2
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parents:
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diff
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|
5499 AbstractGangTask("Enqueue reference objects in parallel"), |
4dfb2df418f2
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parents:
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diff
changeset
|
5500 _enq_task(enq_task) |
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parents:
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diff
changeset
|
5501 { } |
4dfb2df418f2
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parents:
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diff
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|
5502 |
4728
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|
5503 virtual void work(uint worker_id) { |
441e946dc1af
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jmasa
parents:
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|
5504 _enq_task.work(worker_id); |
3979
4dfb2df418f2
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parents:
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diff
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|
5505 } |
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parents:
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diff
changeset
|
5506 }; |
4dfb2df418f2
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parents:
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diff
changeset
|
5507 |
10405 | 5508 // Driver routine for parallel reference enqueueing. |
3979
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parents:
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diff
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|
5509 // Creates an instance of the ref enqueueing gang |
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parents:
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diff
changeset
|
5510 // task and has the worker threads execute it. |
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parents:
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diff
changeset
|
5511 |
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parents:
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diff
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|
5512 void G1STWRefProcTaskExecutor::execute(EnqueueTask& enq_task) { |
4dfb2df418f2
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parents:
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diff
changeset
|
5513 assert(_workers != NULL, "Need parallel worker threads."); |
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parents:
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diff
changeset
|
5514 |
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parents:
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diff
changeset
|
5515 G1STWRefEnqueueTaskProxy enq_task_proxy(enq_task); |
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diff
changeset
|
5516 |
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diff
changeset
|
5517 _g1h->set_par_threads(_active_workers); |
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diff
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|
5518 _workers->run_task(&enq_task_proxy); |
4dfb2df418f2
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parents:
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|
5519 _g1h->set_par_threads(0); |
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parents:
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diff
changeset
|
5520 } |
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6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5521 |
4dfb2df418f2
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parents:
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diff
changeset
|
5522 // End of weak reference support closures |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5523 |
4dfb2df418f2
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parents:
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diff
changeset
|
5524 // Abstract task used to preserve (i.e. copy) any referent objects |
4dfb2df418f2
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diff
changeset
|
5525 // that are in the collection set and are pointed to by reference |
4dfb2df418f2
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parents:
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diff
changeset
|
5526 // objects discovered by the CM ref processor. |
4dfb2df418f2
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johnc
parents:
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diff
changeset
|
5527 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5528 class G1ParPreserveCMReferentsTask: public AbstractGangTask { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5529 protected: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5530 G1CollectedHeap* _g1h; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5531 RefToScanQueueSet *_queues; |
4dfb2df418f2
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parents:
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diff
changeset
|
5532 ParallelTaskTerminator _terminator; |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5533 uint _n_workers; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5534 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5535 public: |
4dfb2df418f2
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johnc
parents:
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diff
changeset
|
5536 G1ParPreserveCMReferentsTask(G1CollectedHeap* g1h,int workers, RefToScanQueueSet *task_queues) : |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5537 AbstractGangTask("ParPreserveCMReferents"), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5538 _g1h(g1h), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5539 _queues(task_queues), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5540 _terminator(workers, _queues), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5541 _n_workers(workers) |
4dfb2df418f2
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parents:
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diff
changeset
|
5542 { } |
4dfb2df418f2
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parents:
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diff
changeset
|
5543 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5544 void work(uint worker_id) { |
3979
4dfb2df418f2
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parents:
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diff
changeset
|
5545 ResourceMark rm; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5546 HandleMark hm; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5547 |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5548 G1ParScanThreadState pss(_g1h, worker_id, NULL); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5549 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
5550 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5551 pss.set_evac_failure_closure(&evac_failure_cl); |
4dfb2df418f2
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parents:
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diff
changeset
|
5552 |
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
5553 assert(pss.queue_is_empty(), "both queue and overflow should be empty"); |
3979
4dfb2df418f2
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parents:
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diff
changeset
|
5554 |
4dfb2df418f2
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parents:
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diff
changeset
|
5555 G1ParScanExtRootClosure only_copy_non_heap_cl(_g1h, &pss, NULL); |
4dfb2df418f2
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diff
changeset
|
5556 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5557 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
4dfb2df418f2
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parents:
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diff
changeset
|
5558 |
4dfb2df418f2
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diff
changeset
|
5559 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
4dfb2df418f2
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parents:
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diff
changeset
|
5560 |
4dfb2df418f2
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parents:
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diff
changeset
|
5561 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5562 // We also need to mark copied objects. |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5563 copy_non_heap_cl = ©_mark_non_heap_cl; |
4dfb2df418f2
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diff
changeset
|
5564 } |
4dfb2df418f2
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diff
changeset
|
5565 |
4dfb2df418f2
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parents:
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diff
changeset
|
5566 // Is alive closure |
4dfb2df418f2
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parents:
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diff
changeset
|
5567 G1AlwaysAliveClosure always_alive(_g1h); |
4dfb2df418f2
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parents:
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diff
changeset
|
5568 |
4dfb2df418f2
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diff
changeset
|
5569 // Copying keep alive closure. Applied to referent objects that need |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5570 // to be copied. |
20270
b7d24d2bc8be
8047323: Remove unused _copy_metadata_obj_cl in G1CopyingKeepAliveClosure
stefank
parents:
20257
diff
changeset
|
5571 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, &pss); |
3979
4dfb2df418f2
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diff
changeset
|
5572 |
4dfb2df418f2
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diff
changeset
|
5573 ReferenceProcessor* rp = _g1h->ref_processor_cm(); |
4dfb2df418f2
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diff
changeset
|
5574 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5575 uint limit = ReferenceProcessor::number_of_subclasses_of_ref() * rp->max_num_q(); |
441e946dc1af
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jmasa
parents:
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diff
changeset
|
5576 uint stride = MIN2(MAX2(_n_workers, 1U), limit); |
3979
4dfb2df418f2
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parents:
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diff
changeset
|
5577 |
4dfb2df418f2
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parents:
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diff
changeset
|
5578 // limit is set using max_num_q() - which was set using ParallelGCThreads. |
4dfb2df418f2
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parents:
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diff
changeset
|
5579 // So this must be true - but assert just in case someone decides to |
4dfb2df418f2
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parents:
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diff
changeset
|
5580 // change the worker ids. |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5581 assert(0 <= worker_id && worker_id < limit, "sanity"); |
3979
4dfb2df418f2
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parents:
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diff
changeset
|
5582 assert(!rp->discovery_is_atomic(), "check this code"); |
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3973
diff
changeset
|
5583 |
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parents:
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diff
changeset
|
5584 // 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
|
5585 for (uint idx = worker_id; idx < limit; idx += stride) { |
4014
bf2d2b8b1726
7095243: Disambiguate ReferenceProcessor::_discoveredSoftRefs
johnc
parents:
4013
diff
changeset
|
5586 DiscoveredList& ref_list = rp->discovered_refs()[idx]; |
3979
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6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5587 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5588 DiscoveredListIterator iter(ref_list, &keep_alive, &always_alive); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5589 while (iter.has_next()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5590 // Since discovery is not atomic for the CM ref processor, we |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5591 // can see some null referent objects. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5592 iter.load_ptrs(DEBUG_ONLY(true)); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5593 oop ref = iter.obj(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5594 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5595 // This will filter nulls. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5596 if (iter.is_referent_alive()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5597 iter.make_referent_alive(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5598 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5599 iter.move_to_next(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5600 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5601 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5602 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5603 // Drain the queue - which may cause stealing |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5604 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _queues, &_terminator); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5605 drain_queue.do_void(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5606 // Allocation buffers were retired at the end of G1ParEvacuateFollowersClosure |
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
5607 assert(pss.queue_is_empty(), "should be"); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5608 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5609 }; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5610 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5611 // Weak Reference processing during an evacuation pause (part 1). |
6819 | 5612 void G1CollectedHeap::process_discovered_references(uint no_of_gc_workers) { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5613 double ref_proc_start = os::elapsedTime(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5614 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5615 ReferenceProcessor* rp = _ref_processor_stw; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5616 assert(rp->discovery_enabled(), "should have been enabled"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5617 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5618 // Any reference objects, in the collection set, that were 'discovered' |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5619 // by the CM ref processor should have already been copied (either by |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5620 // applying the external root copy closure to the discovered lists, or |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5621 // by following an RSet entry). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5622 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5623 // But some of the referents, that are in the collection set, that these |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5624 // reference objects point to may not have been copied: the STW ref |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5625 // processor would have seen that the reference object had already |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5626 // been 'discovered' and would have skipped discovering the reference, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5627 // but would not have treated the reference object as a regular oop. |
10405 | 5628 // 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
|
5629 // referent object. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5630 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5631 // We need to explicitly copy these referent objects - the references |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5632 // will be processed at the end of remarking. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5633 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5634 // 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
|
5635 // 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
|
5636 // referents points to another object which is also referenced by an |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5637 // object discovered by the STW ref processor. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5638 |
4711 | 5639 assert(!G1CollectedHeap::use_parallel_gc_threads() || |
6819 | 5640 no_of_gc_workers == workers()->active_workers(), |
5641 "Need to reset active GC workers"); | |
5642 | |
5643 set_par_threads(no_of_gc_workers); | |
5644 G1ParPreserveCMReferentsTask keep_cm_referents(this, | |
5645 no_of_gc_workers, | |
5646 _task_queues); | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5647 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5648 if (G1CollectedHeap::use_parallel_gc_threads()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5649 workers()->run_task(&keep_cm_referents); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5650 } else { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5651 keep_cm_referents.work(0); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5652 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5653 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5654 set_par_threads(0); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5655 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5656 // Closure to test whether a referent is alive. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5657 G1STWIsAliveClosure is_alive(this); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5658 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5659 // Even when parallel reference processing is enabled, the processing |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5660 // 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
|
5661 // 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
|
5662 // JNI refs. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5663 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5664 // Use only a single queue for this PSS. |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5665 G1ParScanThreadState pss(this, 0, NULL); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5666 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5667 // We do not embed a reference processor in the copying/scanning |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5668 // closures while we're actually processing the discovered |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5669 // reference objects. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5670 G1ParScanHeapEvacFailureClosure evac_failure_cl(this, &pss, NULL); |
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
5671 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5672 pss.set_evac_failure_closure(&evac_failure_cl); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5673 |
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
5674 assert(pss.queue_is_empty(), "pre-condition"); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5675 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5676 G1ParScanExtRootClosure only_copy_non_heap_cl(this, &pss, NULL); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5677 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5678 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(this, &pss, NULL); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5679 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5680 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5681 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5682 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5683 // We also need to mark copied objects. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5684 copy_non_heap_cl = ©_mark_non_heap_cl; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5685 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5686 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5687 // Keep alive closure. |
20270
b7d24d2bc8be
8047323: Remove unused _copy_metadata_obj_cl in G1CopyingKeepAliveClosure
stefank
parents:
20257
diff
changeset
|
5688 G1CopyingKeepAliveClosure keep_alive(this, copy_non_heap_cl, &pss); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5689 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5690 // Serial Complete GC closure |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5691 G1STWDrainQueueClosure drain_queue(this, &pss); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5692 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5693 // Setup the soft refs policy... |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5694 rp->setup_policy(false); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5695 |
10405 | 5696 ReferenceProcessorStats stats; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5697 if (!rp->processing_is_mt()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5698 // Serial reference processing... |
10405 | 5699 stats = rp->process_discovered_references(&is_alive, |
5700 &keep_alive, | |
5701 &drain_queue, | |
5702 NULL, | |
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5703 _gc_timer_stw, |
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5704 _gc_tracer_stw->gc_id()); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5705 } else { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5706 // Parallel reference processing |
6819 | 5707 assert(rp->num_q() == no_of_gc_workers, "sanity"); |
5708 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
5709 | |
5710 G1STWRefProcTaskExecutor par_task_executor(this, workers(), _task_queues, no_of_gc_workers); | |
10405 | 5711 stats = rp->process_discovered_references(&is_alive, |
5712 &keep_alive, | |
5713 &drain_queue, | |
5714 &par_task_executor, | |
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5715 _gc_timer_stw, |
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5716 _gc_tracer_stw->gc_id()); |
10405 | 5717 } |
5718 | |
5719 _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
|
5720 |
983092f35ff7
8028710: G1 does not retire allocation buffers after reference processing work
tschatzl
parents:
20212
diff
changeset
|
5721 // We have completed copying any necessary live referent objects. |
20224
a2328cbebb23
8035401: Fix visibility of G1ParScanThreadState members
tschatzl
parents:
20223
diff
changeset
|
5722 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
|
5723 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5724 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
|
5725 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
|
5726 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5727 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5728 // Weak Reference processing during an evacuation pause (part 2). |
6819 | 5729 void G1CollectedHeap::enqueue_discovered_references(uint no_of_gc_workers) { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5730 double ref_enq_start = os::elapsedTime(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5731 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5732 ReferenceProcessor* rp = _ref_processor_stw; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5733 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
|
5734 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5735 // Now enqueue any remaining on the discovered lists on to |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5736 // the pending list. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5737 if (!rp->processing_is_mt()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5738 // Serial reference processing... |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5739 rp->enqueue_discovered_references(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5740 } else { |
10405 | 5741 // Parallel reference enqueueing |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5742 |
6819 | 5743 assert(no_of_gc_workers == workers()->active_workers(), |
5744 "Need to reset active workers"); | |
5745 assert(rp->num_q() == no_of_gc_workers, "sanity"); | |
5746 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
5747 | |
5748 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
|
5749 rp->enqueue_discovered_references(&par_task_executor); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5750 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5751 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5752 rp->verify_no_references_recorded(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5753 assert(!rp->discovery_enabled(), "should have been disabled"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5754 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5755 // FIXME |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5756 // 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
|
5757 // Should we do that here also? We could, but it is a serial operation |
10405 | 5758 // and could significantly increase the pause time. |
3979
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 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
|
5761 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
|
5762 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5763 |
10405 | 5764 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
|
5765 _expand_heap_after_alloc_failure = true; |
10405 | 5766 _evacuation_failed = false; |
342 | 5767 |
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5768 // 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
|
5769 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
|
5770 |
342 | 5771 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
|
5772 |
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5773 // Disable the hot card cache. |
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5774 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
|
5775 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
|
5776 hot_card_cache->set_use_cache(false); |
889 | 5777 |
23816
6c57a16d0238
8017462: G1: guarantee fails with UseDynamicNumberOfGCThreads
dbuck
parents:
23626
diff
changeset
|
5778 const uint n_workers = workers()->active_workers(); |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5779 assert(UseDynamicNumberOfGCThreads || |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5780 n_workers == workers()->total_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5781 "If not dynamic should be using all the workers"); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5782 set_par_threads(n_workers); |
342 | 5783 |
5784 init_for_evac_failure(NULL); | |
5785 | |
5786 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
|
5787 |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5788 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
|
5789 double start_par_time_sec = os::elapsedTime(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5790 double end_par_time_sec; |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5791 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5792 { |
23224
79b13c9a93e8
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
23223
diff
changeset
|
5793 G1RootProcessor root_processor(this); |
79b13c9a93e8
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
23223
diff
changeset
|
5794 G1ParTask g1_par_task(this, _task_queues, &root_processor); |
20278
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5795 // 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
|
5796 if (g1_policy()->during_initial_mark_pause()) { |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5797 ClassLoaderDataGraph::clear_claimed_marks(); |
2c6ef90f030a
8049421: G1 Class Unloading after completing a concurrent mark cycle
stefank
parents:
20274
diff
changeset
|
5798 } |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5799 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5800 if (G1CollectedHeap::use_parallel_gc_threads()) { |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5801 // 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
|
5802 if (ParallelGCVerbose) G1ParScanThreadState::print_termination_stats_hdr(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5803 // These tasks use ShareHeap::_process_strong_tasks |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5804 assert(UseDynamicNumberOfGCThreads || |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5805 workers()->active_workers() == workers()->total_workers(), |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5806 "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
|
5807 workers()->run_task(&g1_par_task); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5808 } else { |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5809 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
|
5810 g1_par_task.work(0); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5811 } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5812 end_par_time_sec = os::elapsedTime(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5813 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5814 // Closing the inner scope will execute the destructor |
23224
79b13c9a93e8
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
23223
diff
changeset
|
5815 // for the G1RootProcessor object. We record the current |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5816 // elapsed time before closing the scope so that time |
23224
79b13c9a93e8
8075210: Refactor strong root processing in order to allow G1 to evolve separately from GenCollectedHeap
mgerdin
parents:
23223
diff
changeset
|
5817 // taken for the destructor is NOT included in the |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5818 // reported parallel time. |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5819 } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5820 |
23223
8f8f1d578796
8074037: Refactor the G1GCPhaseTime logging to make it easier to add new phases
brutisso
parents:
23222
diff
changeset
|
5821 G1GCPhaseTimes* phase_times = g1_policy()->phase_times(); |
8f8f1d578796
8074037: Refactor the G1GCPhaseTime logging to make it easier to add new phases
brutisso
parents:
23222
diff
changeset
|
5822 |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5823 double par_time_ms = (end_par_time_sec - start_par_time_sec) * 1000.0; |
23223
8f8f1d578796
8074037: Refactor the G1GCPhaseTime logging to make it easier to add new phases
brutisso
parents:
23222
diff
changeset
|
5824 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
|
5825 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5826 double code_root_fixup_time_ms = |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5827 (os::elapsedTime() - end_par_time_sec) * 1000.0; |
23223
8f8f1d578796
8074037: Refactor the G1GCPhaseTime logging to make it easier to add new phases
brutisso
parents:
23222
diff
changeset
|
5828 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
|
5829 |
342 | 5830 set_par_threads(0); |
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5831 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5832 // Process any discovered reference objects - we have |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5833 // to do this _before_ we retire the GC alloc regions |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5834 // as we may have to copy some 'reachable' referent |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5835 // objects (and their reachable sub-graphs) that were |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5836 // not copied during the pause. |
6819 | 5837 process_discovered_references(n_workers); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5838 |
23222 | 5839 if (G1StringDedup::is_enabled()) { |
23223
8f8f1d578796
8074037: Refactor the G1GCPhaseTime logging to make it easier to add new phases
brutisso
parents:
23222
diff
changeset
|
5840 double fixup_start = os::elapsedTime(); |
8f8f1d578796
8074037: Refactor the G1GCPhaseTime logging to make it easier to add new phases
brutisso
parents:
23222
diff
changeset
|
5841 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5842 G1STWIsAliveClosure is_alive(this); |
342 | 5843 G1KeepAliveClosure keep_alive(this); |
23223
8f8f1d578796
8074037: Refactor the G1GCPhaseTime logging to make it easier to add new phases
brutisso
parents:
23222
diff
changeset
|
5844 G1StringDedup::unlink_or_oops_do(&is_alive, &keep_alive, true, phase_times); |
8f8f1d578796
8074037: Refactor the G1GCPhaseTime logging to make it easier to add new phases
brutisso
parents:
23222
diff
changeset
|
5845 |
8f8f1d578796
8074037: Refactor the G1GCPhaseTime logging to make it easier to add new phases
brutisso
parents:
23222
diff
changeset
|
5846 double fixup_time_ms = (os::elapsedTime() - fixup_start) * 1000.0; |
8f8f1d578796
8074037: Refactor the G1GCPhaseTime logging to make it easier to add new phases
brutisso
parents:
23222
diff
changeset
|
5847 phase_times->record_string_dedup_fixup_time(fixup_time_ms); |
342 | 5848 } |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5849 |
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
5850 _allocator->release_gc_alloc_regions(n_workers, evacuation_info); |
342 | 5851 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
|
5852 |
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5853 // 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
|
5854 // 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
|
5855 // 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
|
5856 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
|
5857 hot_card_cache->set_use_cache(true); |
342 | 5858 |
17753
191174b49bec
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
17749
diff
changeset
|
5859 purge_code_root_memory(); |
191174b49bec
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
17749
diff
changeset
|
5860 |
12080 | 5861 if (g1_policy()->during_initial_mark_pause()) { |
5862 // Reset the claim values set during marking the strong code roots | |
5863 reset_heap_region_claim_values(); | |
5864 } | |
5865 | |
342 | 5866 finalize_for_evac_failure(); |
5867 | |
5868 if (evacuation_failed()) { | |
5869 remove_self_forwarding_pointers(); | |
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5870 |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5871 // Reset the G1EvacuationFailureALot counters and flags |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5872 // 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
|
5873 // evacuation failure occurs. |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5874 NOT_PRODUCT(reset_evacuation_should_fail();) |
342 | 5875 } |
5876 | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5877 // Enqueue any remaining references remaining on the STW |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5878 // reference processor's discovered lists. We need to do |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5879 // this after the card table is cleaned (and verified) as |
10405 | 5880 // the act of enqueueing entries on to the pending list |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5881 // will log these updates (and dirty their associated |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5882 // cards). We need these updates logged to update any |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5883 // RSets. |
6819 | 5884 enqueue_discovered_references(n_workers); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5885 |
20504
6948da6d7c13
8052172: Evacuation failure handling in G1 does not evacuate all objects if -XX:-G1DeferredRSUpdate is set
tschatzl
parents:
20503
diff
changeset
|
5886 redirty_logged_cards(); |
22298 | 5887 #if defined(COMPILER2) || INCLUDE_JVMCI |
22294
d86b226e331a
Enable derived oop processing by the GC with JVMCI
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
21143
diff
changeset
|
5888 DerivedPointerTable::update_pointers(); |
d86b226e331a
Enable derived oop processing by the GC with JVMCI
Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
21143
diff
changeset
|
5889 #endif |
342 | 5890 } |
5891 | |
2152 | 5892 void G1CollectedHeap::free_region(HeapRegion* hr, |
5893 FreeRegionList* free_list, | |
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
5894 bool par, |
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
5895 bool locked) { |
20481
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
5896 assert(!hr->is_free(), "the region should not be free"); |
2152 | 5897 assert(!hr->is_empty(), "the region should not be empty"); |
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
5898 assert(_hrm.is_available(hr->hrm_index()), "region should be committed"); |
2152 | 5899 assert(free_list != NULL, "pre-condition"); |
5900 | |
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
5901 if (G1VerifyBitmaps) { |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
5902 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
|
5903 concurrent_mark()->clearRangePrevBitmap(mr); |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
5904 } |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
5905 |
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5906 // 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
|
5907 // 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
|
5908 // (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
|
5909 if (!hr->is_young()) { |
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5910 _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
|
5911 } |
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
5912 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
|
5913 free_list->add_ordered(hr); |
2152 | 5914 } |
5915 | |
5916 void G1CollectedHeap::free_humongous_region(HeapRegion* hr, | |
5917 FreeRegionList* free_list, | |
5918 bool par) { | |
5919 assert(hr->startsHumongous(), "this is only for starts humongous regions"); | |
5920 assert(free_list != NULL, "pre-condition"); | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5921 |
2152 | 5922 size_t hr_capacity = hr->capacity(); |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5923 // 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
|
5924 // otherwise the information will be gone. |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5925 uint last_index = hr->last_hc_index(); |
20481
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
5926 hr->clear_humongous(); |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5927 free_region(hr, free_list, par); |
2152 | 5928 |
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
5929 uint i = hr->hrm_index() + 1; |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5930 while (i < last_index) { |
3766 | 5931 HeapRegion* curr_hr = region_at(i); |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5932 assert(curr_hr->continuesHumongous(), "invariant"); |
20481
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
5933 curr_hr->clear_humongous(); |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5934 free_region(curr_hr, free_list, par); |
2152 | 5935 i += 1; |
5936 } | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5937 } |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5938 |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5939 void G1CollectedHeap::remove_from_old_sets(const HeapRegionSetCount& old_regions_removed, |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5940 const HeapRegionSetCount& humongous_regions_removed) { |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5941 if (old_regions_removed.length() > 0 || humongous_regions_removed.length() > 0) { |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5942 MutexLockerEx x(OldSets_lock, Mutex::_no_safepoint_check_flag); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5943 _old_set.bulk_remove(old_regions_removed); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5944 _humongous_set.bulk_remove(humongous_regions_removed); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5945 } |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5946 |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5947 } |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5948 |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5949 void G1CollectedHeap::prepend_to_freelist(FreeRegionList* list) { |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5950 assert(list != NULL, "list can't be null"); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5951 if (!list->is_empty()) { |
2152 | 5952 MutexLockerEx x(FreeList_lock, Mutex::_no_safepoint_check_flag); |
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
5953 _hrm.insert_list_into_free_list(list); |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5954 } |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5955 } |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5956 |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5957 void G1CollectedHeap::decrement_summary_bytes(size_t bytes) { |
20404
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
parents:
20377
diff
changeset
|
5958 _allocator->decrease_used(bytes); |
342 | 5959 } |
5960 | |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5961 class G1ParCleanupCTTask : public AbstractGangTask { |
12343 | 5962 G1SATBCardTableModRefBS* _ct_bs; |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5963 G1CollectedHeap* _g1h; |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5964 HeapRegion* volatile _su_head; |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5965 public: |
12343 | 5966 G1ParCleanupCTTask(G1SATBCardTableModRefBS* ct_bs, |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
5967 G1CollectedHeap* g1h) : |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5968 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
|
5969 _ct_bs(ct_bs), _g1h(g1h) { } |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5970 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5971 void work(uint worker_id) { |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5972 HeapRegion* r; |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5973 while (r = _g1h->pop_dirty_cards_region()) { |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5974 clear_cards(r); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5975 } |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5976 } |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5977 |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5978 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
|
5979 // 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
|
5980 if (!r->is_survivor()) { |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5981 _ct_bs->clear(MemRegion(r->bottom(), r->end())); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5982 } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5983 } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5984 }; |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5985 |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5986 #ifndef PRODUCT |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5987 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
|
5988 G1CollectedHeap* _g1h; |
12343 | 5989 G1SATBCardTableModRefBS* _ct_bs; |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5990 public: |
12343 | 5991 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
|
5992 : _g1h(g1h), _ct_bs(ct_bs) { } |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
5993 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
|
5994 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
|
5995 _g1h->verify_dirty_region(r); |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5996 } else { |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
5997 _g1h->verify_not_dirty_region(r); |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5998 } |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
5999 return false; |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6000 } |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6001 }; |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6002 |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6003 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
|
6004 // All of the region should be clean. |
12343 | 6005 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
|
6006 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
|
6007 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
|
6008 } |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6009 |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6010 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
|
6011 // 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
|
6012 // 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
|
6013 // 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
|
6014 // 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
|
6015 // 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
|
6016 // 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
|
6017 // is dirty. |
12343 | 6018 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
|
6019 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
|
6020 if (hr->is_young()) { |
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6021 ct_bs->verify_g1_young_region(mr); |
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6022 } else { |
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6023 ct_bs->verify_dirty_region(mr); |
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6024 } |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6025 } |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6026 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6027 void G1CollectedHeap::verify_dirty_young_list(HeapRegion* head) { |
12343 | 6028 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6029 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
|
6030 verify_dirty_region(hr); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6031 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6032 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6033 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6034 void G1CollectedHeap::verify_dirty_young_regions() { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6035 verify_dirty_young_list(_young_list->first_region()); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6036 } |
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6037 |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
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diff
changeset
|
6038 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
|
6039 HeapWord* tams, HeapWord* end) { |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6040 guarantee(tams <= end, |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
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diff
changeset
|
6041 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:
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diff
changeset
|
6042 HeapWord* result = bitmap->getNextMarkedWordAddress(tams, end); |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
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diff
changeset
|
6043 if (result < end) { |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
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diff
changeset
|
6044 gclog_or_tty->cr(); |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6045 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:
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diff
changeset
|
6046 bitmap_name, result); |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6047 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
|
6048 bitmap_name, tams, end); |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6049 return false; |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6050 } |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6051 return true; |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6052 } |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6053 |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6054 bool G1CollectedHeap::verify_bitmaps(const char* caller, HeapRegion* hr) { |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
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diff
changeset
|
6055 CMBitMapRO* prev_bitmap = concurrent_mark()->prevMarkBitMap(); |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
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diff
changeset
|
6056 CMBitMapRO* next_bitmap = (CMBitMapRO*) concurrent_mark()->nextMarkBitMap(); |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
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diff
changeset
|
6057 |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6058 HeapWord* bottom = hr->bottom(); |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
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diff
changeset
|
6059 HeapWord* ptams = hr->prev_top_at_mark_start(); |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
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diff
changeset
|
6060 HeapWord* ntams = hr->next_top_at_mark_start(); |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
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diff
changeset
|
6061 HeapWord* end = hr->end(); |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6062 |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6063 bool res_p = verify_no_bits_over_tams("prev", prev_bitmap, ptams, end); |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6064 |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6065 bool res_n = true; |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6066 // We reset mark_in_progress() before we reset _cmThread->in_progress() and in this window |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6067 // we do the clearing of the next bitmap concurrently. Thus, we can not verify the bitmap |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6068 // if we happen to be in that state. |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6069 if (mark_in_progress() || !_cmThread->in_progress()) { |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6070 res_n = verify_no_bits_over_tams("next", next_bitmap, ntams, end); |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6071 } |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6072 if (!res_p || !res_n) { |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6073 gclog_or_tty->print_cr("#### Bitmap verification failed for "HR_FORMAT, |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6074 HR_FORMAT_PARAMS(hr)); |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6075 gclog_or_tty->print_cr("#### Caller: %s", caller); |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6076 return false; |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6077 } |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6078 return true; |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6079 } |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6080 |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6081 void G1CollectedHeap::check_bitmaps(const char* caller, HeapRegion* hr) { |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6082 if (!G1VerifyBitmaps) return; |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6083 |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6084 guarantee(verify_bitmaps(caller, hr), "bitmap verification"); |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6085 } |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6086 |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6087 class G1VerifyBitmapClosure : public HeapRegionClosure { |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6088 private: |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6089 const char* _caller; |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6090 G1CollectedHeap* _g1h; |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6091 bool _failures; |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6092 |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6093 public: |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6094 G1VerifyBitmapClosure(const char* caller, G1CollectedHeap* g1h) : |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6095 _caller(caller), _g1h(g1h), _failures(false) { } |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6096 |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6097 bool failures() { return _failures; } |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6098 |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6099 virtual bool doHeapRegion(HeapRegion* hr) { |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6100 if (hr->continuesHumongous()) return false; |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6101 |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6102 bool result = _g1h->verify_bitmaps(_caller, hr); |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6103 if (!result) { |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6104 _failures = true; |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6105 } |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6106 return false; |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6107 } |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6108 }; |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6109 |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6110 void G1CollectedHeap::check_bitmaps(const char* caller) { |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6111 if (!G1VerifyBitmaps) return; |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6112 |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6113 G1VerifyBitmapClosure cl(caller, this); |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6114 heap_region_iterate(&cl); |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6115 guarantee(!cl.failures(), "bitmap verification"); |
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6116 } |
22901
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
6117 |
22923
c04f46b4abe4
8068036: assert(is_available(index)) failed in G1 cset
tschatzl
parents:
22909
diff
changeset
|
6118 class G1CheckCSetFastTableClosure : public HeapRegionClosure { |
c04f46b4abe4
8068036: assert(is_available(index)) failed in G1 cset
tschatzl
parents:
22909
diff
changeset
|
6119 private: |
c04f46b4abe4
8068036: assert(is_available(index)) failed in G1 cset
tschatzl
parents:
22909
diff
changeset
|
6120 bool _failures; |
c04f46b4abe4
8068036: assert(is_available(index)) failed in G1 cset
tschatzl
parents:
22909
diff
changeset
|
6121 public: |
c04f46b4abe4
8068036: assert(is_available(index)) failed in G1 cset
tschatzl
parents:
22909
diff
changeset
|
6122 G1CheckCSetFastTableClosure() : HeapRegionClosure(), _failures(false) { } |
c04f46b4abe4
8068036: assert(is_available(index)) failed in G1 cset
tschatzl
parents:
22909
diff
changeset
|
6123 |
c04f46b4abe4
8068036: assert(is_available(index)) failed in G1 cset
tschatzl
parents:
22909
diff
changeset
|
6124 virtual bool doHeapRegion(HeapRegion* hr) { |
c04f46b4abe4
8068036: assert(is_available(index)) failed in G1 cset
tschatzl
parents:
22909
diff
changeset
|
6125 uint i = hr->hrm_index(); |
c04f46b4abe4
8068036: assert(is_available(index)) failed in G1 cset
tschatzl
parents:
22909
diff
changeset
|
6126 InCSetState cset_state = (InCSetState) G1CollectedHeap::heap()->_in_cset_fast_test.get_by_index(i); |
22901
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
6127 if (hr->isHumongous()) { |
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
6128 if (hr->in_collection_set()) { |
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
6129 gclog_or_tty->print_cr("\n## humongous region %u in CSet", i); |
22923
c04f46b4abe4
8068036: assert(is_available(index)) failed in G1 cset
tschatzl
parents:
22909
diff
changeset
|
6130 _failures = true; |
c04f46b4abe4
8068036: assert(is_available(index)) failed in G1 cset
tschatzl
parents:
22909
diff
changeset
|
6131 return true; |
22901
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
6132 } |
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
6133 if (cset_state.is_in_cset()) { |
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
6134 gclog_or_tty->print_cr("\n## inconsistent cset state %d for humongous region %u", cset_state.value(), i); |
22923
c04f46b4abe4
8068036: assert(is_available(index)) failed in G1 cset
tschatzl
parents:
22909
diff
changeset
|
6135 _failures = true; |
c04f46b4abe4
8068036: assert(is_available(index)) failed in G1 cset
tschatzl
parents:
22909
diff
changeset
|
6136 return true; |
22901
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
6137 } |
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
6138 if (hr->continuesHumongous() && cset_state.is_humongous()) { |
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
6139 gclog_or_tty->print_cr("\n## inconsistent cset state %d for continues humongous region %u", cset_state.value(), i); |
22923
c04f46b4abe4
8068036: assert(is_available(index)) failed in G1 cset
tschatzl
parents:
22909
diff
changeset
|
6140 _failures = true; |
c04f46b4abe4
8068036: assert(is_available(index)) failed in G1 cset
tschatzl
parents:
22909
diff
changeset
|
6141 return true; |
22901
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
6142 } |
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
6143 } else { |
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
6144 if (cset_state.is_humongous()) { |
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
6145 gclog_or_tty->print_cr("\n## inconsistent cset state %d for non-humongous region %u", cset_state.value(), i); |
22923
c04f46b4abe4
8068036: assert(is_available(index)) failed in G1 cset
tschatzl
parents:
22909
diff
changeset
|
6146 _failures = true; |
c04f46b4abe4
8068036: assert(is_available(index)) failed in G1 cset
tschatzl
parents:
22909
diff
changeset
|
6147 return true; |
22901
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
6148 } |
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
6149 if (hr->in_collection_set() != cset_state.is_in_cset()) { |
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
6150 gclog_or_tty->print_cr("\n## in CSet %d / cset state %d inconsistency for region %u", |
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
6151 hr->in_collection_set(), cset_state.value(), i); |
22923
c04f46b4abe4
8068036: assert(is_available(index)) failed in G1 cset
tschatzl
parents:
22909
diff
changeset
|
6152 _failures = true; |
c04f46b4abe4
8068036: assert(is_available(index)) failed in G1 cset
tschatzl
parents:
22909
diff
changeset
|
6153 return true; |
22901
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
6154 } |
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
6155 if (cset_state.is_in_cset()) { |
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
6156 if (hr->is_young() != (cset_state.is_young())) { |
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
6157 gclog_or_tty->print_cr("\n## is_young %d / cset state %d inconsistency for region %u", |
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
6158 hr->is_young(), cset_state.value(), i); |
22923
c04f46b4abe4
8068036: assert(is_available(index)) failed in G1 cset
tschatzl
parents:
22909
diff
changeset
|
6159 _failures = true; |
c04f46b4abe4
8068036: assert(is_available(index)) failed in G1 cset
tschatzl
parents:
22909
diff
changeset
|
6160 return true; |
22901
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
6161 } |
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
6162 if (hr->is_old() != (cset_state.is_old())) { |
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
6163 gclog_or_tty->print_cr("\n## is_old %d / cset state %d inconsistency for region %u", |
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
6164 hr->is_old(), cset_state.value(), i); |
22923
c04f46b4abe4
8068036: assert(is_available(index)) failed in G1 cset
tschatzl
parents:
22909
diff
changeset
|
6165 _failures = true; |
c04f46b4abe4
8068036: assert(is_available(index)) failed in G1 cset
tschatzl
parents:
22909
diff
changeset
|
6166 return true; |
22901
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
6167 } |
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
6168 } |
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
6169 } |
22923
c04f46b4abe4
8068036: assert(is_available(index)) failed in G1 cset
tschatzl
parents:
22909
diff
changeset
|
6170 return false; |
c04f46b4abe4
8068036: assert(is_available(index)) failed in G1 cset
tschatzl
parents:
22909
diff
changeset
|
6171 } |
c04f46b4abe4
8068036: assert(is_available(index)) failed in G1 cset
tschatzl
parents:
22909
diff
changeset
|
6172 |
c04f46b4abe4
8068036: assert(is_available(index)) failed in G1 cset
tschatzl
parents:
22909
diff
changeset
|
6173 bool failures() const { return _failures; } |
c04f46b4abe4
8068036: assert(is_available(index)) failed in G1 cset
tschatzl
parents:
22909
diff
changeset
|
6174 }; |
c04f46b4abe4
8068036: assert(is_available(index)) failed in G1 cset
tschatzl
parents:
22909
diff
changeset
|
6175 |
c04f46b4abe4
8068036: assert(is_available(index)) failed in G1 cset
tschatzl
parents:
22909
diff
changeset
|
6176 bool G1CollectedHeap::check_cset_fast_test() { |
c04f46b4abe4
8068036: assert(is_available(index)) failed in G1 cset
tschatzl
parents:
22909
diff
changeset
|
6177 G1CheckCSetFastTableClosure cl; |
c04f46b4abe4
8068036: assert(is_available(index)) failed in G1 cset
tschatzl
parents:
22909
diff
changeset
|
6178 _hrm.iterate(&cl); |
c04f46b4abe4
8068036: assert(is_available(index)) failed in G1 cset
tschatzl
parents:
22909
diff
changeset
|
6179 return !cl.failures(); |
22901
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
6180 } |
20291
e0954897238a
7132678: G1: verify that the marking bitmaps have no marks for objects over TAMS
brutisso
parents:
20282
diff
changeset
|
6181 #endif // PRODUCT |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6182 |
342 | 6183 void G1CollectedHeap::cleanUpCardTable() { |
12343 | 6184 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
342 | 6185 double start = os::elapsedTime(); |
6186 | |
4023 | 6187 { |
6188 // Iterate over the dirty cards region list. | |
6189 G1ParCleanupCTTask cleanup_task(ct_bs, this); | |
6190 | |
4711 | 6191 if (G1CollectedHeap::use_parallel_gc_threads()) { |
6192 set_par_threads(); | |
4023 | 6193 workers()->run_task(&cleanup_task); |
6194 set_par_threads(0); | |
6195 } else { | |
6196 while (_dirty_cards_region_list) { | |
6197 HeapRegion* r = _dirty_cards_region_list; | |
6198 cleanup_task.clear_cards(r); | |
6199 _dirty_cards_region_list = r->get_next_dirty_cards_region(); | |
6200 if (_dirty_cards_region_list == r) { | |
6201 // The last region. | |
6202 _dirty_cards_region_list = NULL; | |
6203 } | |
6204 r->set_next_dirty_cards_region(NULL); | |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6205 } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6206 } |
4023 | 6207 #ifndef PRODUCT |
6208 if (G1VerifyCTCleanup || VerifyAfterGC) { | |
6209 G1VerifyCardTableCleanup cleanup_verifier(this, ct_bs); | |
6210 heap_region_iterate(&cleanup_verifier); | |
6211 } | |
6212 #endif | |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6213 } |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6214 |
342 | 6215 double elapsed = os::elapsedTime() - start; |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
6216 g1_policy()->phase_times()->record_clear_ct_time(elapsed * 1000.0); |
342 | 6217 } |
6218 | |
10405 | 6219 void G1CollectedHeap::free_collection_set(HeapRegion* cs_head, EvacuationInfo& evacuation_info) { |
2152 | 6220 size_t pre_used = 0; |
6221 FreeRegionList local_free_list("Local List for CSet Freeing"); | |
6222 | |
342 | 6223 double young_time_ms = 0.0; |
6224 double non_young_time_ms = 0.0; | |
6225 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6226 // Since the collection set is a superset of the the young list, |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6227 // all we need to do to clear the young list is clear its |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6228 // head and length, and unlink any young regions in the code below |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6229 _young_list->clear(); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6230 |
342 | 6231 G1CollectorPolicy* policy = g1_policy(); |
6232 | |
6233 double start_sec = os::elapsedTime(); | |
6234 bool non_young = true; | |
6235 | |
6236 HeapRegion* cur = cs_head; | |
6237 int age_bound = -1; | |
6238 size_t rs_lengths = 0; | |
6239 | |
6240 while (cur != NULL) { | |
2361 | 6241 assert(!is_on_master_free_list(cur), "sanity"); |
342 | 6242 if (non_young) { |
6243 if (cur->is_young()) { | |
6244 double end_sec = os::elapsedTime(); | |
6245 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
6246 non_young_time_ms += elapsed_ms; | |
6247 | |
6248 start_sec = os::elapsedTime(); | |
6249 non_young = false; | |
6250 } | |
6251 } else { | |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6252 if (!cur->is_young()) { |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6253 double end_sec = os::elapsedTime(); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6254 double elapsed_ms = (end_sec - start_sec) * 1000.0; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6255 young_time_ms += elapsed_ms; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6256 |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6257 start_sec = os::elapsedTime(); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6258 non_young = true; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6259 } |
342 | 6260 } |
6261 | |
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
6262 rs_lengths += cur->rem_set()->occupied_locked(); |
342 | 6263 |
6264 HeapRegion* next = cur->next_in_collection_set(); | |
6265 assert(cur->in_collection_set(), "bad CS"); | |
6266 cur->set_next_in_collection_set(NULL); | |
6267 cur->set_in_collection_set(false); | |
6268 | |
6269 if (cur->is_young()) { | |
6270 int index = cur->young_index_in_cset(); | |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4073
diff
changeset
|
6271 assert(index != -1, "invariant"); |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
6272 assert((uint) index < policy->young_cset_region_length(), "invariant"); |
342 | 6273 size_t words_survived = _surviving_young_words[index]; |
6274 cur->record_surv_words_in_group(words_survived); | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6275 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6276 // At this point the we have 'popped' cur from the collection set |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6277 // (linked via next_in_collection_set()) but it is still in the |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6278 // young list (linked via next_young_region()). Clear the |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6279 // _next_young_region field. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6280 cur->set_next_young_region(NULL); |
342 | 6281 } else { |
6282 int index = cur->young_index_in_cset(); | |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4073
diff
changeset
|
6283 assert(index == -1, "invariant"); |
342 | 6284 } |
6285 | |
6286 assert( (cur->is_young() && cur->young_index_in_cset() > -1) || | |
6287 (!cur->is_young() && cur->young_index_in_cset() == -1), | |
6288 "invariant" ); | |
6289 | |
6290 if (!cur->evacuation_failed()) { | |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6291 MemRegion used_mr = cur->used_region(); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6292 |
342 | 6293 // And the region is empty. |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6294 assert(!used_mr.is_empty(), "Should not have empty regions in a CS."); |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6295 pre_used += cur->used(); |
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
6296 free_region(cur, &local_free_list, false /* par */, true /* locked */); |
342 | 6297 } else { |
6298 cur->uninstall_surv_rate_group(); | |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4073
diff
changeset
|
6299 if (cur->is_young()) { |
342 | 6300 cur->set_young_index_in_cset(-1); |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4073
diff
changeset
|
6301 } |
342 | 6302 cur->set_evacuation_failed(false); |
4072 | 6303 // 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
|
6304 cur->set_old(); |
4072 | 6305 _old_set.add(cur); |
10405 | 6306 evacuation_info.increment_collectionset_used_after(cur->used()); |
342 | 6307 } |
6308 cur = next; | |
6309 } | |
6310 | |
10405 | 6311 evacuation_info.set_regions_freed(local_free_list.length()); |
342 | 6312 policy->record_max_rs_lengths(rs_lengths); |
6313 policy->cset_regions_freed(); | |
6314 | |
6315 double end_sec = os::elapsedTime(); | |
6316 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
|
6317 |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6318 if (non_young) { |
342 | 6319 non_young_time_ms += elapsed_ms; |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6320 } else { |
342 | 6321 young_time_ms += elapsed_ms; |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6322 } |
342 | 6323 |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6324 prepend_to_freelist(&local_free_list); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6325 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
|
6326 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
|
6327 policy->phase_times()->record_non_young_free_cset_time_ms(non_young_time_ms); |
342 | 6328 } |
6329 | |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6330 class G1FreeHumongousRegionClosure : public HeapRegionClosure { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6331 private: |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6332 FreeRegionList* _free_region_list; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6333 HeapRegionSet* _proxy_set; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6334 HeapRegionSetCount _humongous_regions_removed; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6335 size_t _freed_bytes; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6336 public: |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6337 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6338 G1FreeHumongousRegionClosure(FreeRegionList* free_region_list) : |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6339 _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
|
6340 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6341 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6342 virtual bool doHeapRegion(HeapRegion* r) { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6343 if (!r->startsHumongous()) { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6344 return false; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6345 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6346 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6347 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6348 |
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6349 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
|
6350 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
|
6351 |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6352 // 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
|
6353 // 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
|
6354 // 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
|
6355 // |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6356 // 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
|
6357 // because: |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6358 // - 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
|
6359 // the object because we never allocate other objects into them. |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6360 // (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
|
6361 // remembered set) |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6362 // - 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
|
6363 // (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
|
6364 // until the end of a concurrent mark. |
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 // 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
|
6367 // 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
|
6368 // all objects allocated during that time are considered live. |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6369 // SATB marking is even more conservative than the remembered set. |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6370 // 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
|
6371 // nobody has a reference to it. |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6372 // 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
|
6373 // 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
|
6374 // |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6375 // Other implementation considerations: |
23024
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
6376 // - never consider object arrays at this time because they would pose |
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
6377 // considerable effort for cleaning up the the remembered sets. This is |
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
6378 // required because stale remembered sets might reference locations that |
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
6379 // are currently allocated into. |
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6380 uint region_idx = r->hrm_index(); |
23026
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
6381 if (!g1h->is_humongous_reclaim_candidate(region_idx) || |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
6382 !r->rem_set()->is_empty()) { |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6383 |
23024
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
6384 if (G1TraceEagerReclaimHumongousObjects) { |
23026
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
6385 gclog_or_tty->print_cr("Live humongous region %u size "SIZE_FORMAT" start "PTR_FORMAT" length "UINT32_FORMAT" with remset "SIZE_FORMAT" code roots "SIZE_FORMAT" is marked %d reclaim candidate %d type array %d", |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6386 region_idx, |
22894
2af69bed8db6
8058801: G1TraceReclaimDeadHumongousObjectsAtYoungGC only prints humongous object liveness output when there is at least one candidate humongous object
tschatzl
parents:
22862
diff
changeset
|
6387 obj->size()*HeapWordSize, |
23024
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
6388 r->bottom(), |
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
6389 r->region_num(), |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6390 r->rem_set()->occupied(), |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6391 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
|
6392 next_bitmap->isMarked(r->bottom()), |
23026
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
6393 g1h->is_humongous_reclaim_candidate(region_idx), |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
6394 obj->is_typeArray() |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6395 ); |
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 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6398 return false; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6399 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6400 |
23026
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
6401 guarantee(obj->is_typeArray(), |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
6402 err_msg("Only eagerly reclaiming type arrays is supported, but the object " |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
6403 PTR_FORMAT " is not.", |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6404 r->bottom())); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6405 |
23024
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
6406 if (G1TraceEagerReclaimHumongousObjects) { |
23026
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
6407 gclog_or_tty->print_cr("Dead humongous region %u size "SIZE_FORMAT" start "PTR_FORMAT" length "UINT32_FORMAT" with remset "SIZE_FORMAT" code roots "SIZE_FORMAT" is marked %d reclaim candidate %d type array %d", |
23024
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
6408 region_idx, |
22894
2af69bed8db6
8058801: G1TraceReclaimDeadHumongousObjectsAtYoungGC only prints humongous object liveness output when there is at least one candidate humongous object
tschatzl
parents:
22862
diff
changeset
|
6409 obj->size()*HeapWordSize, |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6410 r->bottom(), |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6411 r->region_num(), |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6412 r->rem_set()->occupied(), |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6413 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
|
6414 next_bitmap->isMarked(r->bottom()), |
23026
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
6415 g1h->is_humongous_reclaim_candidate(region_idx), |
b7c8142a9e0b
8069367: Eagerly reclaimed humongous objects left on mark stack
kbarrett
parents:
23024
diff
changeset
|
6416 obj->is_typeArray() |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6417 ); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6418 } |
20307
04d77ac27223
8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap
tschatzl
parents:
20305
diff
changeset
|
6419 // 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
|
6420 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
|
6421 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
|
6422 } |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6423 _freed_bytes += r->used(); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6424 r->set_containing_set(NULL); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6425 _humongous_regions_removed.increment(1u, r->capacity()); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6426 g1h->free_humongous_region(r, _free_region_list, false); |
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 return false; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6429 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6430 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6431 HeapRegionSetCount& humongous_free_count() { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6432 return _humongous_regions_removed; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6433 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6434 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6435 size_t bytes_freed() const { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6436 return _freed_bytes; |
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 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6439 size_t humongous_reclaimed() const { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6440 return _humongous_regions_removed.length(); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6441 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6442 }; |
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 void G1CollectedHeap::eagerly_reclaim_humongous_regions() { |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6445 assert_at_safepoint(true); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6446 |
23024
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
6447 if (!G1EagerReclaimHumongousObjects || |
cbc7c4c9e11c
8048179: Early reclaim of large objects that are referenced by a few objects
tschatzl
parents:
22978
diff
changeset
|
6448 (!_has_humongous_reclaim_candidates && !G1TraceEagerReclaimHumongousObjects)) { |
20305
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6449 g1_policy()->phase_times()->record_fast_reclaim_humongous_time_ms(0.0, 0); |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6450 return; |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6451 } |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6452 |
755930f931e3
8027959: Early reclamation of large objects in G1
tschatzl
parents:
20304
diff
changeset
|
6453 double start_time = os::elapsedTime(); |
755930f931e3
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6454 |
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6455 FreeRegionList local_cleanup_list("Local Humongous Cleanup List"); |
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|
6456 |
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|
6457 G1FreeHumongousRegionClosure cl(&local_cleanup_list); |
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|
6458 heap_region_iterate(&cl); |
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|
6459 |
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|
6460 HeapRegionSetCount empty_set; |
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|
6461 remove_from_old_sets(empty_set, cl.humongous_free_count()); |
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|
6462 |
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|
6463 G1HRPrinter* hr_printer = _g1h->hr_printer(); |
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6464 if (hr_printer->is_active()) { |
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|
6465 FreeRegionListIterator iter(&local_cleanup_list); |
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|
6466 while (iter.more_available()) { |
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|
6467 HeapRegion* hr = iter.get_next(); |
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|
6468 hr_printer->cleanup(hr); |
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|
6469 } |
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|
6470 } |
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|
6471 |
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|
6472 prepend_to_freelist(&local_cleanup_list); |
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|
6473 decrement_summary_bytes(cl.bytes_freed()); |
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|
6474 |
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|
6475 g1_policy()->phase_times()->record_fast_reclaim_humongous_time_ms((os::elapsedTime() - start_time) * 1000.0, |
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|
6476 cl.humongous_reclaimed()); |
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|
6477 } |
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|
6478 |
1394
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|
6479 // 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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|
6480 // any policy statistics or update free lists; we are abandoning |
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6481 // the current incremental collection set in preparation of a |
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6482 // full collection. After the full GC we will start to build up |
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|
6483 // the incremental collection set again. |
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6484 // This is only called when we're doing a full collection |
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6485 // and is immediately followed by the tearing down of the young list. |
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6486 |
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|
6487 void G1CollectedHeap::abandon_collection_set(HeapRegion* cs_head) { |
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6488 HeapRegion* cur = cs_head; |
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6489 |
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|
6490 while (cur != NULL) { |
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|
6491 HeapRegion* next = cur->next_in_collection_set(); |
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6492 assert(cur->in_collection_set(), "bad CS"); |
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|
6493 cur->set_next_in_collection_set(NULL); |
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6494 cur->set_in_collection_set(false); |
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|
6495 cur->set_young_index_in_cset(-1); |
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6496 cur = next; |
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|
6497 } |
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|
6498 } |
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|
6499 |
2152 | 6500 void G1CollectedHeap::set_free_regions_coming() { |
6501 if (G1ConcRegionFreeingVerbose) { | |
6502 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
6503 "setting free regions coming"); | |
6504 } | |
6505 | |
6506 assert(!free_regions_coming(), "pre-condition"); | |
6507 _free_regions_coming = true; | |
342 | 6508 } |
6509 | |
2152 | 6510 void G1CollectedHeap::reset_free_regions_coming() { |
4837
eff609af17d7
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|
6511 assert(free_regions_coming(), "pre-condition"); |
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|
6512 |
2152 | 6513 { |
6514 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
6515 _free_regions_coming = false; | |
6516 SecondaryFreeList_lock->notify_all(); | |
6517 } | |
6518 | |
6519 if (G1ConcRegionFreeingVerbose) { | |
6520 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
6521 "reset free regions coming"); | |
342 | 6522 } |
6523 } | |
6524 | |
2152 | 6525 void G1CollectedHeap::wait_while_free_regions_coming() { |
6526 // Most of the time we won't have to wait, so let's do a quick test | |
6527 // first before we take the lock. | |
6528 if (!free_regions_coming()) { | |
6529 return; | |
6530 } | |
6531 | |
6532 if (G1ConcRegionFreeingVerbose) { | |
6533 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
6534 "waiting for free regions"); | |
342 | 6535 } |
6536 | |
6537 { | |
2152 | 6538 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
6539 while (free_regions_coming()) { | |
6540 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
342 | 6541 } |
2152 | 6542 } |
6543 | |
6544 if (G1ConcRegionFreeingVerbose) { | |
6545 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
6546 "done waiting for free regions"); | |
6547 } | |
342 | 6548 } |
6549 | |
6550 void G1CollectedHeap::set_region_short_lived_locked(HeapRegion* hr) { | |
6551 assert(heap_lock_held_for_gc(), | |
6552 "the heap lock should already be held by or for this thread"); | |
6553 _young_list->push_region(hr); | |
6554 } | |
6555 | |
6556 class NoYoungRegionsClosure: public HeapRegionClosure { | |
6557 private: | |
6558 bool _success; | |
6559 public: | |
6560 NoYoungRegionsClosure() : _success(true) { } | |
6561 bool doHeapRegion(HeapRegion* r) { | |
6562 if (r->is_young()) { | |
6563 gclog_or_tty->print_cr("Region ["PTR_FORMAT", "PTR_FORMAT") tagged as young", | |
6564 r->bottom(), r->end()); | |
6565 _success = false; | |
6566 } | |
6567 return false; | |
6568 } | |
6569 bool success() { return _success; } | |
6570 }; | |
6571 | |
1394
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6572 bool G1CollectedHeap::check_young_list_empty(bool check_heap, bool check_sample) { |
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6573 bool ret = _young_list->check_list_empty(check_sample); |
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|
6574 |
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diff
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|
6575 if (check_heap) { |
342 | 6576 NoYoungRegionsClosure closure; |
6577 heap_region_iterate(&closure); | |
6578 ret = ret && closure.success(); | |
6579 } | |
6580 | |
6581 return ret; | |
6582 } | |
6583 | |
4072 | 6584 class TearDownRegionSetsClosure : public HeapRegionClosure { |
6585 private: | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
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|
6586 HeapRegionSet *_old_set; |
2152 | 6587 |
342 | 6588 public: |
17736
58fc1b1523dc
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brutisso
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|
6589 TearDownRegionSetsClosure(HeapRegionSet* old_set) : _old_set(old_set) { } |
2152 | 6590 |
342 | 6591 bool doHeapRegion(HeapRegion* r) { |
20481
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8057768: Make heap region region type in G1 HeapRegion explicit
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|
6592 if (r->is_old()) { |
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changeset
|
6593 _old_set->remove(r); |
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|
6594 } else { |
c02ec279b062
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|
6595 // We ignore free regions, we'll empty the free list afterwards. |
c02ec279b062
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changeset
|
6596 // We ignore young regions, we'll empty the young list afterwards. |
4072 | 6597 // We ignore humongous regions, we're not tearing down the |
20481
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
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changeset
|
6598 // humongous regions set. |
c02ec279b062
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changeset
|
6599 assert(r->is_free() || r->is_young() || r->isHumongous(), |
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|
6600 "it cannot be another type"); |
342 | 6601 } |
6602 return false; | |
6603 } | |
6604 | |
4072 | 6605 ~TearDownRegionSetsClosure() { |
6606 assert(_old_set->is_empty(), "post-condition"); | |
2152 | 6607 } |
342 | 6608 }; |
6609 | |
4072 | 6610 void G1CollectedHeap::tear_down_region_sets(bool free_list_only) { |
6611 assert_at_safepoint(true /* should_be_vm_thread */); | |
6612 | |
6613 if (!free_list_only) { | |
6614 TearDownRegionSetsClosure cl(&_old_set); | |
6615 heap_region_iterate(&cl); | |
6616 | |
17764 | 6617 // Note that emptying the _young_list is postponed and instead done as |
6618 // the first step when rebuilding the regions sets again. The reason for | |
6619 // this is that during a full GC string deduplication needs to know if | |
6620 // a collected region was young or old when the full GC was initiated. | |
4072 | 6621 } |
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changeset
|
6622 _hrm.remove_all_free_regions(); |
4072 | 6623 } |
6624 | |
6625 class RebuildRegionSetsClosure : public HeapRegionClosure { | |
6626 private: | |
6627 bool _free_list_only; | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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diff
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|
6628 HeapRegionSet* _old_set; |
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
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diff
changeset
|
6629 HeapRegionManager* _hrm; |
4072 | 6630 size_t _total_used; |
6631 | |
6632 public: | |
6633 RebuildRegionSetsClosure(bool free_list_only, | |
20377
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8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
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20359
diff
changeset
|
6634 HeapRegionSet* old_set, HeapRegionManager* hrm) : |
4072 | 6635 _free_list_only(free_list_only), |
20377
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8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
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20359
diff
changeset
|
6636 _old_set(old_set), _hrm(hrm), _total_used(0) { |
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
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diff
changeset
|
6637 assert(_hrm->num_free_regions() == 0, "pre-condition"); |
4072 | 6638 if (!free_list_only) { |
6639 assert(_old_set->is_empty(), "pre-condition"); | |
6640 } | |
6641 } | |
6642 | |
6643 bool doHeapRegion(HeapRegion* r) { | |
6644 if (r->continuesHumongous()) { | |
6645 return false; | |
6646 } | |
6647 | |
6648 if (r->is_empty()) { | |
6649 // 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
|
6650 r->set_free(); |
20404
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8057536: Refactor G1 to allow context specific allocations
sjohanss
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diff
changeset
|
6651 r->set_allocation_context(AllocationContext::system()); |
20377
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tschatzl
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20359
diff
changeset
|
6652 _hrm->insert_into_free_list(r); |
4072 | 6653 } else if (!_free_list_only) { |
6654 assert(!r->is_young(), "we should not come across young regions"); | |
6655 | |
6656 if (r->isHumongous()) { | |
6657 // We ignore humongous regions, we left the humongous set unchanged | |
6658 } else { | |
20481
c02ec279b062
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brutisso
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diff
changeset
|
6659 // Objects that were compacted would have ended up on regions |
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brutisso
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diff
changeset
|
6660 // that were previously old or free. |
c02ec279b062
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brutisso
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20445
diff
changeset
|
6661 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
|
6662 // We now consider them old, so register as such. |
c02ec279b062
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brutisso
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diff
changeset
|
6663 r->set_old(); |
4072 | 6664 _old_set->add(r); |
6665 } | |
6666 _total_used += r->used(); | |
6667 } | |
6668 | |
6669 return false; | |
6670 } | |
6671 | |
6672 size_t total_used() { | |
6673 return _total_used; | |
6674 } | |
6675 }; | |
6676 | |
6677 void G1CollectedHeap::rebuild_region_sets(bool free_list_only) { | |
6678 assert_at_safepoint(true /* should_be_vm_thread */); | |
6679 | |
17764 | 6680 if (!free_list_only) { |
6681 _young_list->empty_list(); | |
6682 } | |
6683 | |
20377
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tschatzl
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20359
diff
changeset
|
6684 RebuildRegionSetsClosure cl(free_list_only, &_old_set, &_hrm); |
4072 | 6685 heap_region_iterate(&cl); |
6686 | |
6687 if (!free_list_only) { | |
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227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
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20377
diff
changeset
|
6688 _allocator->set_used(cl.total_used()); |
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
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20377
diff
changeset
|
6689 } |
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sjohanss
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20377
diff
changeset
|
6690 assert(_allocator->used_unlocked() == recalculate_used(), |
227a9e5e4b4a
8057536: Refactor G1 to allow context specific allocations
sjohanss
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20377
diff
changeset
|
6691 err_msg("inconsistent _allocator->used_unlocked(), " |
4072 | 6692 "value: "SIZE_FORMAT" recalculated: "SIZE_FORMAT, |
20404
227a9e5e4b4a
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sjohanss
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20377
diff
changeset
|
6693 _allocator->used_unlocked(), recalculate_used())); |
342 | 6694 } |
6695 | |
6696 void G1CollectedHeap::set_refine_cte_cl_concurrency(bool concurrent) { | |
6697 _refine_cte_cl->set_concurrent(concurrent); | |
6698 } | |
6699 | |
6700 bool G1CollectedHeap::is_in_closed_subset(const void* p) const { | |
6701 HeapRegion* hr = heap_region_containing(p); | |
20335
eec72fa4b108
8040722: G1: Clean up usages of heap_region_containing
brutisso
parents:
20334
diff
changeset
|
6702 return hr->is_in(p); |
342 | 6703 } |
2152 | 6704 |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
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3824
diff
changeset
|
6705 // Methods for the mutator alloc region |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
diff
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|
6706 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6707 HeapRegion* G1CollectedHeap::new_mutator_alloc_region(size_t word_size, |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
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2432
diff
changeset
|
6708 bool force) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6709 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
|
6710 assert(!force || g1_policy()->can_expand_young_list(), |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6711 "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
|
6712 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
|
6713 if (force || !young_list_full) { |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6714 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
|
6715 false /* is_old */, |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6716 false /* do_expand */); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6717 if (new_alloc_region != NULL) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6718 set_region_short_lived_locked(new_alloc_region); |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6719 _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
|
6720 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
|
6721 return new_alloc_region; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6722 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6723 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6724 return NULL; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6725 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6726 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6727 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
|
6728 size_t allocated_bytes) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6729 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
|
6730 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
|
6731 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6732 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
|
6733 _allocator->increase_used(allocated_bytes); |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6734 _hr_printer.retire(alloc_region); |
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6735 // 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
|
6736 // 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
|
6737 // used space has been recored in _summary_bytes_used. |
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6738 g1mm()->update_eden_size(); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6739 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6740 |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6741 void G1CollectedHeap::set_par_threads() { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6742 // 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
|
6743 // in the workgroup. |
4711 | 6744 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
|
6745 uint n_workers = workers()->active_workers(); |
4711 | 6746 assert(UseDynamicNumberOfGCThreads || |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6747 n_workers == workers()->total_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6748 "Otherwise should be using the total number of workers"); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6749 if (n_workers == 0) { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6750 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
|
6751 n_workers = ParallelGCThreads; |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6752 workers()->set_active_workers(n_workers); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6753 } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6754 set_par_threads(n_workers); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6755 } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6756 |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6757 // 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
|
6758 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6759 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
|
6760 uint count, |
22901
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
6761 InCSetState dest) { |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6762 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
|
6763 |
22901
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
6764 if (count < g1_policy()->max_regions(dest)) { |
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
6765 const bool is_survivor = (dest.is_young()); |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6766 HeapRegion* new_alloc_region = new_region(word_size, |
22901
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
6767 !is_survivor, |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6768 true /* do_expand */); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6769 if (new_alloc_region != NULL) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6770 // 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
|
6771 // 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
|
6772 // for survivors too. |
22897
80ac3ee51955
8065358: Refactor G1s usage of save_marks and reduce related races
mgerdin
parents:
22895
diff
changeset
|
6773 new_alloc_region->record_timestamp(); |
22901
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
6774 if (is_survivor) { |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6775 new_alloc_region->set_survivor(); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6776 _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
|
6777 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
|
6778 } else { |
20481
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
6779 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
|
6780 _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
|
6781 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
|
6782 } |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
6783 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
|
6784 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
|
6785 return new_alloc_region; |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6786 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6787 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6788 return NULL; |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6789 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6790 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6791 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
|
6792 size_t allocated_bytes, |
22901
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
6793 InCSetState dest) { |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
6794 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
|
6795 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
|
6796 g1_policy()->record_bytes_copied_during_gc(allocated_bytes); |
22901
c132be0fb74d
8060025: Object copy time regressions after JDK-8031323 and JDK-8057536
tschatzl
parents:
22898
diff
changeset
|
6797 if (dest.is_young()) { |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6798 young_list()->add_survivor_region(alloc_region); |
4072 | 6799 } else { |
6800 _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
|
6801 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6802 _hr_printer.retire(alloc_region); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6803 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6804 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6805 // Heap region set verification |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6806 |
2152 | 6807 class VerifyRegionListsClosure : public HeapRegionClosure { |
6808 private: | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6809 HeapRegionSet* _old_set; |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6810 HeapRegionSet* _humongous_set; |
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6811 HeapRegionManager* _hrm; |
2152 | 6812 |
6813 public: | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6814 HeapRegionSetCount _old_count; |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6815 HeapRegionSetCount _humongous_count; |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6816 HeapRegionSetCount _free_count; |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6817 |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6818 VerifyRegionListsClosure(HeapRegionSet* old_set, |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6819 HeapRegionSet* humongous_set, |
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6820 HeapRegionManager* hrm) : |
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6821 _old_set(old_set), _humongous_set(humongous_set), _hrm(hrm), |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6822 _old_count(), _humongous_count(), _free_count(){ } |
2152 | 6823 |
6824 bool doHeapRegion(HeapRegion* hr) { | |
6825 if (hr->continuesHumongous()) { | |
6826 return false; | |
6827 } | |
6828 | |
6829 if (hr->is_young()) { | |
6830 // TODO | |
6831 } else if (hr->startsHumongous()) { | |
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6832 assert(hr->containing_set() == _humongous_set, err_msg("Heap region %u is starts humongous but not in humongous set.", hr->hrm_index())); |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6833 _humongous_count.increment(1u, hr->capacity()); |
2152 | 6834 } else if (hr->is_empty()) { |
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6835 assert(_hrm->is_free(hr), err_msg("Heap region %u is empty but not on the free list.", hr->hrm_index())); |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6836 _free_count.increment(1u, hr->capacity()); |
20481
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
brutisso
parents:
20445
diff
changeset
|
6837 } else if (hr->is_old()) { |
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
parents:
20359
diff
changeset
|
6838 assert(hr->containing_set() == _old_set, err_msg("Heap region %u is old but not in the old set.", hr->hrm_index())); |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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diff
changeset
|
6839 _old_count.increment(1u, hr->capacity()); |
20481
c02ec279b062
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brutisso
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diff
changeset
|
6840 } else { |
c02ec279b062
8057768: Make heap region region type in G1 HeapRegion explicit
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diff
changeset
|
6841 ShouldNotReachHere(); |
2152 | 6842 } |
22724
2d21c13d7829
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Tom Rodriguez <tom.rodriguez@oracle.com>
parents:
22298
diff
changeset
|
6843 hr->rem_set()->verify(); |
2152 | 6844 return false; |
6845 } | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
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diff
changeset
|
6846 |
20377
a8ea2f110d87
8054819: Rename HeapRegionSeq to HeapRegionManager
tschatzl
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20359
diff
changeset
|
6847 void verify_counts(HeapRegionSet* old_set, HeapRegionSet* humongous_set, HeapRegionManager* free_list) { |
17736
58fc1b1523dc
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brutisso
parents:
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diff
changeset
|
6848 guarantee(old_set->length() == _old_count.length(), err_msg("Old set count mismatch. Expected %u, actual %u.", old_set->length(), _old_count.length())); |
58fc1b1523dc
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brutisso
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6849 guarantee(old_set->total_capacity_bytes() == _old_count.capacity(), err_msg("Old set capacity mismatch. Expected " SIZE_FORMAT ", actual " SIZE_FORMAT, |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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changeset
|
6850 old_set->total_capacity_bytes(), _old_count.capacity())); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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changeset
|
6851 |
58fc1b1523dc
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brutisso
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diff
changeset
|
6852 guarantee(humongous_set->length() == _humongous_count.length(), err_msg("Hum set count mismatch. Expected %u, actual %u.", humongous_set->length(), _humongous_count.length())); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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diff
changeset
|
6853 guarantee(humongous_set->total_capacity_bytes() == _humongous_count.capacity(), err_msg("Hum set capacity mismatch. Expected " SIZE_FORMAT ", actual " SIZE_FORMAT, |
58fc1b1523dc
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brutisso
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diff
changeset
|
6854 humongous_set->total_capacity_bytes(), _humongous_count.capacity())); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6855 |
20336
6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
tschatzl
parents:
20335
diff
changeset
|
6856 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
58fc1b1523dc
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brutisso
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diff
changeset
|
6857 guarantee(free_list->total_capacity_bytes() == _free_count.capacity(), err_msg("Free list capacity mismatch. Expected " SIZE_FORMAT ", actual " SIZE_FORMAT, |
58fc1b1523dc
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brutisso
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6858 free_list->total_capacity_bytes(), _free_count.capacity())); |
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brutisso
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6859 } |
2152 | 6860 }; |
6861 | |
6862 void G1CollectedHeap::verify_region_sets() { | |
6863 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); | |
6864 | |
6865 // First, check the explicit lists. | |
20377
a8ea2f110d87
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tschatzl
parents:
20359
diff
changeset
|
6866 _hrm.verify(); |
2152 | 6867 { |
6868 // Given that a concurrent operation might be adding regions to | |
6869 // the secondary free list we have to take the lock before | |
6870 // verifying it. | |
6871 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
17736
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brutisso
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changeset
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6872 _secondary_free_list.verify_list(); |
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brutisso
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6873 } |
2152 | 6874 |
6875 // If a concurrent region freeing operation is in progress it will | |
6876 // be difficult to correctly attributed any free regions we come | |
6877 // across to the correct free list given that they might belong to | |
6878 // one of several (free_list, secondary_free_list, any local lists, | |
6879 // etc.). So, if that's the case we will skip the rest of the | |
6880 // verification operation. Alternatively, waiting for the concurrent | |
6881 // operation to complete will have a non-trivial effect on the GC's | |
6882 // operation (no concurrent operation will last longer than the | |
6883 // interval between two calls to verification) and it might hide | |
6884 // any issues that we would like to catch during testing. | |
6885 if (free_regions_coming()) { | |
6886 return; | |
6887 } | |
6888 | |
2361 | 6889 // Make sure we append the secondary_free_list on the free_list so |
6890 // that all free regions we will come across can be safely | |
6891 // attributed to the free_list. | |
6892 append_secondary_free_list_if_not_empty_with_lock(); | |
2152 | 6893 |
6894 // Finally, make sure that the region accounting in the lists is | |
6895 // consistent with what we see in the heap. | |
6896 | |
20377
a8ea2f110d87
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tschatzl
parents:
20359
diff
changeset
|
6897 VerifyRegionListsClosure cl(&_old_set, &_humongous_set, &_hrm); |
2152 | 6898 heap_region_iterate(&cl); |
20377
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tschatzl
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diff
changeset
|
6899 cl.verify_counts(&_old_set, &_humongous_set, &_hrm); |
342 | 6900 } |
12080 | 6901 |
6902 // Optimized nmethod scanning | |
6903 | |
6904 class RegisterNMethodOopClosure: public OopClosure { | |
6905 G1CollectedHeap* _g1h; | |
6906 nmethod* _nm; | |
6907 | |
6908 template <class T> void do_oop_work(T* p) { | |
6909 T heap_oop = oopDesc::load_heap_oop(p); | |
6910 if (!oopDesc::is_null(heap_oop)) { | |
6911 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
6912 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
13062
28674af341ac
8027756: assert(!hr->isHumongous()) failed: code root in humongous region?
tschatzl
parents:
13060
diff
changeset
|
6913 assert(!hr->continuesHumongous(), |
28674af341ac
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tschatzl
parents:
13060
diff
changeset
|
6914 err_msg("trying to add code root "PTR_FORMAT" in continuation of humongous region "HR_FORMAT |
28674af341ac
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tschatzl
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diff
changeset
|
6915 " starting at "HR_FORMAT, |
28674af341ac
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tschatzl
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diff
changeset
|
6916 _nm, HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()))); |
12080 | 6917 |
20494 | 6918 // HeapRegion::add_strong_code_root_locked() avoids adding duplicate entries. |
6919 hr->add_strong_code_root_locked(_nm); | |
12080 | 6920 } |
6921 } | |
6922 | |
6923 public: | |
6924 RegisterNMethodOopClosure(G1CollectedHeap* g1h, nmethod* nm) : | |
6925 _g1h(g1h), _nm(nm) {} | |
6926 | |
6927 void do_oop(oop* p) { do_oop_work(p); } | |
6928 void do_oop(narrowOop* p) { do_oop_work(p); } | |
6929 }; | |
6930 | |
6931 class UnregisterNMethodOopClosure: public OopClosure { | |
6932 G1CollectedHeap* _g1h; | |
6933 nmethod* _nm; | |
6934 | |
6935 template <class T> void do_oop_work(T* p) { | |
6936 T heap_oop = oopDesc::load_heap_oop(p); | |
6937 if (!oopDesc::is_null(heap_oop)) { | |
6938 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
6939 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
13062
28674af341ac
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tschatzl
parents:
13060
diff
changeset
|
6940 assert(!hr->continuesHumongous(), |
28674af341ac
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tschatzl
parents:
13060
diff
changeset
|
6941 err_msg("trying to remove code root "PTR_FORMAT" in continuation of humongous region "HR_FORMAT |
28674af341ac
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tschatzl
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diff
changeset
|
6942 " starting at "HR_FORMAT, |
28674af341ac
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tschatzl
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diff
changeset
|
6943 _nm, HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()))); |
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tschatzl
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13060
diff
changeset
|
6944 |
12080 | 6945 hr->remove_strong_code_root(_nm); |
6946 } | |
6947 } | |
6948 | |
6949 public: | |
6950 UnregisterNMethodOopClosure(G1CollectedHeap* g1h, nmethod* nm) : | |
6951 _g1h(g1h), _nm(nm) {} | |
6952 | |
6953 void do_oop(oop* p) { do_oop_work(p); } | |
6954 void do_oop(narrowOop* p) { do_oop_work(p); } | |
6955 }; | |
6956 | |
6957 void G1CollectedHeap::register_nmethod(nmethod* nm) { | |
6958 CollectedHeap::register_nmethod(nm); | |
6959 | |
6960 guarantee(nm != NULL, "sanity"); | |
6961 RegisterNMethodOopClosure reg_cl(this, nm); | |
6962 nm->oops_do(®_cl); | |
6963 } | |
6964 | |
6965 void G1CollectedHeap::unregister_nmethod(nmethod* nm) { | |
6966 CollectedHeap::unregister_nmethod(nm); | |
6967 | |
6968 guarantee(nm != NULL, "sanity"); | |
6969 UnregisterNMethodOopClosure reg_cl(this, nm); | |
6970 nm->oops_do(®_cl, true); | |
6971 } | |
6972 | |
17753
191174b49bec
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
17749
diff
changeset
|
6973 void G1CollectedHeap::purge_code_root_memory() { |
191174b49bec
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
17749
diff
changeset
|
6974 double purge_start = os::elapsedTime(); |
20494 | 6975 G1CodeRootSet::purge(); |
17753
191174b49bec
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tschatzl
parents:
17749
diff
changeset
|
6976 double purge_time_ms = (os::elapsedTime() - purge_start) * 1000.0; |
191174b49bec
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tschatzl
parents:
17749
diff
changeset
|
6977 g1_policy()->phase_times()->record_strong_code_root_purge_time(purge_time_ms); |
191174b49bec
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tschatzl
parents:
17749
diff
changeset
|
6978 } |
191174b49bec
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tschatzl
parents:
17749
diff
changeset
|
6979 |
12080 | 6980 class RebuildStrongCodeRootClosure: public CodeBlobClosure { |
6981 G1CollectedHeap* _g1h; | |
6982 | |
6983 public: | |
6984 RebuildStrongCodeRootClosure(G1CollectedHeap* g1h) : | |
6985 _g1h(g1h) {} | |
6986 | |
6987 void do_code_blob(CodeBlob* cb) { | |
6988 nmethod* nm = (cb != NULL) ? cb->as_nmethod_or_null() : NULL; | |
6989 if (nm == NULL) { | |
6990 return; | |
6991 } | |
6992 | |
20191
fd81a5764900
8046231: G1: Code root location ... from nmethod ... not in strong code roots for region
pliden
parents:
20190
diff
changeset
|
6993 if (ScavengeRootsInCode) { |
12080 | 6994 _g1h->register_nmethod(nm); |
6995 } | |
6996 } | |
6997 }; | |
6998 | |
6999 void G1CollectedHeap::rebuild_strong_code_roots() { | |
7000 RebuildStrongCodeRootClosure blob_cl(this); | |
7001 CodeCache::blobs_do(&blob_cl); | |
7002 } |