Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp @ 17773:8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
Summary: The free list is being maintained in a sorted fashion and old and humongous regions are allocated from the bottom of the heap while young regions are allocated at the top.
Reviewed-by: tschatzl, mgerdin
Contributed-by: jesper.wilhelmsson@oracle.com, staffan.friberg@oracle.com
author | jwilhelm |
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date | Fri, 28 Feb 2014 15:27:09 +0100 |
parents | bc22cbb8b45a |
children | 2775f322649a |
rev | line source |
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342 | 1 /* |
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2 * Copyright (c) 2001, 2014, Oracle and/or its affiliates. All rights reserved. |
342 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
342 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
12080 | 26 #include "code/codeCache.hpp" |
1972 | 27 #include "code/icBuffer.hpp" |
28 #include "gc_implementation/g1/bufferingOopClosure.hpp" | |
29 #include "gc_implementation/g1/concurrentG1Refine.hpp" | |
30 #include "gc_implementation/g1/concurrentG1RefineThread.hpp" | |
31 #include "gc_implementation/g1/concurrentMarkThread.inline.hpp" | |
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32 #include "gc_implementation/g1/g1AllocRegion.inline.hpp" |
1972 | 33 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" |
34 #include "gc_implementation/g1/g1CollectorPolicy.hpp" | |
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35 #include "gc_implementation/g1/g1ErgoVerbose.hpp" |
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36 #include "gc_implementation/g1/g1EvacFailure.hpp" |
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37 #include "gc_implementation/g1/g1GCPhaseTimes.hpp" |
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38 #include "gc_implementation/g1/g1Log.hpp" |
1972 | 39 #include "gc_implementation/g1/g1MarkSweep.hpp" |
40 #include "gc_implementation/g1/g1OopClosures.inline.hpp" | |
41 #include "gc_implementation/g1/g1RemSet.inline.hpp" | |
10405 | 42 #include "gc_implementation/g1/g1YCTypes.hpp" |
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43 #include "gc_implementation/g1/heapRegion.inline.hpp" |
1972 | 44 #include "gc_implementation/g1/heapRegionRemSet.hpp" |
45 #include "gc_implementation/g1/heapRegionSeq.inline.hpp" | |
46 #include "gc_implementation/g1/vm_operations_g1.hpp" | |
10405 | 47 #include "gc_implementation/shared/gcHeapSummary.hpp" |
48 #include "gc_implementation/shared/gcTimer.hpp" | |
49 #include "gc_implementation/shared/gcTrace.hpp" | |
50 #include "gc_implementation/shared/gcTraceTime.hpp" | |
1972 | 51 #include "gc_implementation/shared/isGCActiveMark.hpp" |
52 #include "memory/gcLocker.inline.hpp" | |
53 #include "memory/generationSpec.hpp" | |
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54 #include "memory/iterator.hpp" |
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55 #include "memory/referenceProcessor.hpp" |
1972 | 56 #include "oops/oop.inline.hpp" |
57 #include "oops/oop.pcgc.inline.hpp" | |
58 #include "runtime/vmThread.hpp" | |
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59 #include "utilities/ticks.hpp" |
342 | 60 |
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61 size_t G1CollectedHeap::_humongous_object_threshold_in_words = 0; |
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62 |
342 | 63 // turn it on so that the contents of the young list (scan-only / |
64 // to-be-collected) are printed at "strategic" points before / during | |
65 // / after the collection --- this is useful for debugging | |
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66 #define YOUNG_LIST_VERBOSE 0 |
342 | 67 // CURRENT STATUS |
68 // This file is under construction. Search for "FIXME". | |
69 | |
70 // INVARIANTS/NOTES | |
71 // | |
72 // All allocation activity covered by the G1CollectedHeap interface is | |
1973 | 73 // serialized by acquiring the HeapLock. This happens in mem_allocate |
74 // and allocate_new_tlab, which are the "entry" points to the | |
75 // allocation code from the rest of the JVM. (Note that this does not | |
76 // apply to TLAB allocation, which is not part of this interface: it | |
77 // is done by clients of this interface.) | |
342 | 78 |
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79 // Notes on implementation of parallelism in different tasks. |
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80 // |
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81 // G1ParVerifyTask uses heap_region_par_iterate_chunked() for parallelism. |
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82 // The number of GC workers is passed to heap_region_par_iterate_chunked(). |
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83 // It does use run_task() which sets _n_workers in the task. |
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84 // G1ParTask executes g1_process_strong_roots() -> |
10405 | 85 // SharedHeap::process_strong_roots() which calls eventually to |
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86 // CardTableModRefBS::par_non_clean_card_iterate_work() which uses |
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87 // SequentialSubTasksDone. SharedHeap::process_strong_roots() also |
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88 // directly uses SubTasksDone (_process_strong_tasks field in SharedHeap). |
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89 // |
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90 |
342 | 91 // Local to this file. |
92 | |
93 class RefineCardTableEntryClosure: public CardTableEntryClosure { | |
94 SuspendibleThreadSet* _sts; | |
95 G1RemSet* _g1rs; | |
96 ConcurrentG1Refine* _cg1r; | |
97 bool _concurrent; | |
98 public: | |
99 RefineCardTableEntryClosure(SuspendibleThreadSet* sts, | |
100 G1RemSet* g1rs, | |
101 ConcurrentG1Refine* cg1r) : | |
102 _sts(sts), _g1rs(g1rs), _cg1r(cg1r), _concurrent(true) | |
103 {} | |
104 bool do_card_ptr(jbyte* card_ptr, int worker_i) { | |
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105 bool oops_into_cset = _g1rs->refine_card(card_ptr, worker_i, false); |
1705 | 106 // This path is executed by the concurrent refine or mutator threads, |
107 // concurrently, and so we do not care if card_ptr contains references | |
108 // that point into the collection set. | |
109 assert(!oops_into_cset, "should be"); | |
110 | |
342 | 111 if (_concurrent && _sts->should_yield()) { |
112 // Caller will actually yield. | |
113 return false; | |
114 } | |
115 // Otherwise, we finished successfully; return true. | |
116 return true; | |
117 } | |
118 void set_concurrent(bool b) { _concurrent = b; } | |
119 }; | |
120 | |
121 | |
122 class ClearLoggedCardTableEntryClosure: public CardTableEntryClosure { | |
123 int _calls; | |
124 G1CollectedHeap* _g1h; | |
125 CardTableModRefBS* _ctbs; | |
126 int _histo[256]; | |
127 public: | |
128 ClearLoggedCardTableEntryClosure() : | |
12343 | 129 _calls(0), _g1h(G1CollectedHeap::heap()), _ctbs(_g1h->g1_barrier_set()) |
342 | 130 { |
131 for (int i = 0; i < 256; i++) _histo[i] = 0; | |
132 } | |
133 bool do_card_ptr(jbyte* card_ptr, int worker_i) { | |
134 if (_g1h->is_in_reserved(_ctbs->addr_for(card_ptr))) { | |
135 _calls++; | |
136 unsigned char* ujb = (unsigned char*)card_ptr; | |
137 int ind = (int)(*ujb); | |
138 _histo[ind]++; | |
139 *card_ptr = -1; | |
140 } | |
141 return true; | |
142 } | |
143 int calls() { return _calls; } | |
144 void print_histo() { | |
145 gclog_or_tty->print_cr("Card table value histogram:"); | |
146 for (int i = 0; i < 256; i++) { | |
147 if (_histo[i] != 0) { | |
148 gclog_or_tty->print_cr(" %d: %d", i, _histo[i]); | |
149 } | |
150 } | |
151 } | |
152 }; | |
153 | |
154 class RedirtyLoggedCardTableEntryClosure: public CardTableEntryClosure { | |
155 int _calls; | |
156 G1CollectedHeap* _g1h; | |
157 CardTableModRefBS* _ctbs; | |
158 public: | |
159 RedirtyLoggedCardTableEntryClosure() : | |
12343 | 160 _calls(0), _g1h(G1CollectedHeap::heap()), _ctbs(_g1h->g1_barrier_set()) {} |
161 | |
342 | 162 bool do_card_ptr(jbyte* card_ptr, int worker_i) { |
163 if (_g1h->is_in_reserved(_ctbs->addr_for(card_ptr))) { | |
164 _calls++; | |
165 *card_ptr = 0; | |
166 } | |
167 return true; | |
168 } | |
169 int calls() { return _calls; } | |
170 }; | |
171 | |
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172 YoungList::YoungList(G1CollectedHeap* g1h) : |
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173 _g1h(g1h), _head(NULL), _length(0), _last_sampled_rs_lengths(0), |
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174 _survivor_head(NULL), _survivor_tail(NULL), _survivor_length(0) { |
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175 guarantee(check_list_empty(false), "just making sure..."); |
342 | 176 } |
177 | |
178 void YoungList::push_region(HeapRegion *hr) { | |
179 assert(!hr->is_young(), "should not already be young"); | |
180 assert(hr->get_next_young_region() == NULL, "cause it should!"); | |
181 | |
182 hr->set_next_young_region(_head); | |
183 _head = hr; | |
184 | |
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185 _g1h->g1_policy()->set_region_eden(hr, (int) _length); |
342 | 186 ++_length; |
187 } | |
188 | |
189 void YoungList::add_survivor_region(HeapRegion* hr) { | |
545 | 190 assert(hr->is_survivor(), "should be flagged as survivor region"); |
342 | 191 assert(hr->get_next_young_region() == NULL, "cause it should!"); |
192 | |
193 hr->set_next_young_region(_survivor_head); | |
194 if (_survivor_head == NULL) { | |
545 | 195 _survivor_tail = hr; |
342 | 196 } |
197 _survivor_head = hr; | |
198 ++_survivor_length; | |
199 } | |
200 | |
201 void YoungList::empty_list(HeapRegion* list) { | |
202 while (list != NULL) { | |
203 HeapRegion* next = list->get_next_young_region(); | |
204 list->set_next_young_region(NULL); | |
205 list->uninstall_surv_rate_group(); | |
206 list->set_not_young(); | |
207 list = next; | |
208 } | |
209 } | |
210 | |
211 void YoungList::empty_list() { | |
212 assert(check_list_well_formed(), "young list should be well formed"); | |
213 | |
214 empty_list(_head); | |
215 _head = NULL; | |
216 _length = 0; | |
217 | |
218 empty_list(_survivor_head); | |
219 _survivor_head = NULL; | |
545 | 220 _survivor_tail = NULL; |
342 | 221 _survivor_length = 0; |
222 | |
223 _last_sampled_rs_lengths = 0; | |
224 | |
225 assert(check_list_empty(false), "just making sure..."); | |
226 } | |
227 | |
228 bool YoungList::check_list_well_formed() { | |
229 bool ret = true; | |
230 | |
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231 uint length = 0; |
342 | 232 HeapRegion* curr = _head; |
233 HeapRegion* last = NULL; | |
234 while (curr != NULL) { | |
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235 if (!curr->is_young()) { |
342 | 236 gclog_or_tty->print_cr("### YOUNG REGION "PTR_FORMAT"-"PTR_FORMAT" " |
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237 "incorrectly tagged (y: %d, surv: %d)", |
342 | 238 curr->bottom(), curr->end(), |
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239 curr->is_young(), curr->is_survivor()); |
342 | 240 ret = false; |
241 } | |
242 ++length; | |
243 last = curr; | |
244 curr = curr->get_next_young_region(); | |
245 } | |
246 ret = ret && (length == _length); | |
247 | |
248 if (!ret) { | |
249 gclog_or_tty->print_cr("### YOUNG LIST seems not well formed!"); | |
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250 gclog_or_tty->print_cr("### list has %u entries, _length is %u", |
342 | 251 length, _length); |
252 } | |
253 | |
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254 return ret; |
342 | 255 } |
256 | |
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257 bool YoungList::check_list_empty(bool check_sample) { |
342 | 258 bool ret = true; |
259 | |
260 if (_length != 0) { | |
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261 gclog_or_tty->print_cr("### YOUNG LIST should have 0 length, not %u", |
342 | 262 _length); |
263 ret = false; | |
264 } | |
265 if (check_sample && _last_sampled_rs_lengths != 0) { | |
266 gclog_or_tty->print_cr("### YOUNG LIST has non-zero last sampled RS lengths"); | |
267 ret = false; | |
268 } | |
269 if (_head != NULL) { | |
270 gclog_or_tty->print_cr("### YOUNG LIST does not have a NULL head"); | |
271 ret = false; | |
272 } | |
273 if (!ret) { | |
274 gclog_or_tty->print_cr("### YOUNG LIST does not seem empty"); | |
275 } | |
276 | |
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277 return ret; |
342 | 278 } |
279 | |
280 void | |
281 YoungList::rs_length_sampling_init() { | |
282 _sampled_rs_lengths = 0; | |
283 _curr = _head; | |
284 } | |
285 | |
286 bool | |
287 YoungList::rs_length_sampling_more() { | |
288 return _curr != NULL; | |
289 } | |
290 | |
291 void | |
292 YoungList::rs_length_sampling_next() { | |
293 assert( _curr != NULL, "invariant" ); | |
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294 size_t rs_length = _curr->rem_set()->occupied(); |
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295 |
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296 _sampled_rs_lengths += rs_length; |
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297 |
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298 // The current region may not yet have been added to the |
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299 // incremental collection set (it gets added when it is |
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300 // retired as the current allocation region). |
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301 if (_curr->in_collection_set()) { |
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302 // Update the collection set policy information for this region |
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303 _g1h->g1_policy()->update_incremental_cset_info(_curr, rs_length); |
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304 } |
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305 |
342 | 306 _curr = _curr->get_next_young_region(); |
307 if (_curr == NULL) { | |
308 _last_sampled_rs_lengths = _sampled_rs_lengths; | |
309 // gclog_or_tty->print_cr("last sampled RS lengths = %d", _last_sampled_rs_lengths); | |
310 } | |
311 } | |
312 | |
313 void | |
314 YoungList::reset_auxilary_lists() { | |
315 guarantee( is_empty(), "young list should be empty" ); | |
316 assert(check_list_well_formed(), "young list should be well formed"); | |
317 | |
318 // Add survivor regions to SurvRateGroup. | |
319 _g1h->g1_policy()->note_start_adding_survivor_regions(); | |
545 | 320 _g1h->g1_policy()->finished_recalculating_age_indexes(true /* is_survivors */); |
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321 |
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322 int young_index_in_cset = 0; |
342 | 323 for (HeapRegion* curr = _survivor_head; |
324 curr != NULL; | |
325 curr = curr->get_next_young_region()) { | |
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326 _g1h->g1_policy()->set_region_survivor(curr, young_index_in_cset); |
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327 |
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328 // The region is a non-empty survivor so let's add it to |
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329 // the incremental collection set for the next evacuation |
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330 // pause. |
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331 _g1h->g1_policy()->add_region_to_incremental_cset_rhs(curr); |
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332 young_index_in_cset += 1; |
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333 } |
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334 assert((uint) young_index_in_cset == _survivor_length, "post-condition"); |
342 | 335 _g1h->g1_policy()->note_stop_adding_survivor_regions(); |
336 | |
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337 _head = _survivor_head; |
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338 _length = _survivor_length; |
342 | 339 if (_survivor_head != NULL) { |
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340 assert(_survivor_tail != NULL, "cause it shouldn't be"); |
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341 assert(_survivor_length > 0, "invariant"); |
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342 _survivor_tail->set_next_young_region(NULL); |
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343 } |
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344 |
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345 // Don't clear the survivor list handles until the start of |
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346 // the next evacuation pause - we need it in order to re-tag |
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347 // the survivor regions from this evacuation pause as 'young' |
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348 // at the start of the next. |
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349 |
545 | 350 _g1h->g1_policy()->finished_recalculating_age_indexes(false /* is_survivors */); |
342 | 351 |
352 assert(check_list_well_formed(), "young list should be well formed"); | |
353 } | |
354 | |
355 void YoungList::print() { | |
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356 HeapRegion* lists[] = {_head, _survivor_head}; |
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357 const char* names[] = {"YOUNG", "SURVIVOR"}; |
342 | 358 |
359 for (unsigned int list = 0; list < ARRAY_SIZE(lists); ++list) { | |
360 gclog_or_tty->print_cr("%s LIST CONTENTS", names[list]); | |
361 HeapRegion *curr = lists[list]; | |
362 if (curr == NULL) | |
363 gclog_or_tty->print_cr(" empty"); | |
364 while (curr != NULL) { | |
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365 gclog_or_tty->print_cr(" "HR_FORMAT", P: "PTR_FORMAT "N: "PTR_FORMAT", age: %4d", |
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366 HR_FORMAT_PARAMS(curr), |
342 | 367 curr->prev_top_at_mark_start(), |
368 curr->next_top_at_mark_start(), | |
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369 curr->age_in_surv_rate_group_cond()); |
342 | 370 curr = curr->get_next_young_region(); |
371 } | |
372 } | |
373 | |
374 gclog_or_tty->print_cr(""); | |
375 } | |
376 | |
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377 void G1CollectedHeap::push_dirty_cards_region(HeapRegion* hr) |
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378 { |
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379 // Claim the right to put the region on the dirty cards region list |
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380 // by installing a self pointer. |
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381 HeapRegion* next = hr->get_next_dirty_cards_region(); |
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382 if (next == NULL) { |
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383 HeapRegion* res = (HeapRegion*) |
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384 Atomic::cmpxchg_ptr(hr, hr->next_dirty_cards_region_addr(), |
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385 NULL); |
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386 if (res == NULL) { |
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387 HeapRegion* head; |
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388 do { |
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389 // Put the region to the dirty cards region list. |
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390 head = _dirty_cards_region_list; |
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391 next = (HeapRegion*) |
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392 Atomic::cmpxchg_ptr(hr, &_dirty_cards_region_list, head); |
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393 if (next == head) { |
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394 assert(hr->get_next_dirty_cards_region() == hr, |
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395 "hr->get_next_dirty_cards_region() != hr"); |
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396 if (next == NULL) { |
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397 // The last region in the list points to itself. |
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398 hr->set_next_dirty_cards_region(hr); |
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399 } else { |
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400 hr->set_next_dirty_cards_region(next); |
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401 } |
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402 } |
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403 } while (next != head); |
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404 } |
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405 } |
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406 } |
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407 |
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408 HeapRegion* G1CollectedHeap::pop_dirty_cards_region() |
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409 { |
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410 HeapRegion* head; |
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411 HeapRegion* hr; |
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412 do { |
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413 head = _dirty_cards_region_list; |
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414 if (head == NULL) { |
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415 return NULL; |
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416 } |
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417 HeapRegion* new_head = head->get_next_dirty_cards_region(); |
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418 if (head == new_head) { |
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419 // The last region. |
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420 new_head = NULL; |
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421 } |
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422 hr = (HeapRegion*)Atomic::cmpxchg_ptr(new_head, &_dirty_cards_region_list, |
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423 head); |
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424 } while (hr != head); |
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425 assert(hr != NULL, "invariant"); |
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426 hr->set_next_dirty_cards_region(NULL); |
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427 return hr; |
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428 } |
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429 |
342 | 430 void G1CollectedHeap::stop_conc_gc_threads() { |
794 | 431 _cg1r->stop(); |
342 | 432 _cmThread->stop(); |
433 } | |
434 | |
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435 #ifdef ASSERT |
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436 // A region is added to the collection set as it is retired |
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437 // so an address p can point to a region which will be in the |
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438 // collection set but has not yet been retired. This method |
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439 // therefore is only accurate during a GC pause after all |
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440 // regions have been retired. It is used for debugging |
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441 // to check if an nmethod has references to objects that can |
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442 // be move during a partial collection. Though it can be |
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443 // inaccurate, it is sufficient for G1 because the conservative |
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444 // implementation of is_scavengable() for G1 will indicate that |
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445 // all nmethods must be scanned during a partial collection. |
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446 bool G1CollectedHeap::is_in_partial_collection(const void* p) { |
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447 HeapRegion* hr = heap_region_containing(p); |
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448 return hr != NULL && hr->in_collection_set(); |
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449 } |
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450 #endif |
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451 |
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452 // Returns true if the reference points to an object that |
10405 | 453 // can move in an incremental collection. |
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454 bool G1CollectedHeap::is_scavengable(const void* p) { |
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455 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
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456 G1CollectorPolicy* g1p = g1h->g1_policy(); |
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457 HeapRegion* hr = heap_region_containing(p); |
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458 if (hr == NULL) { |
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459 // null |
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460 assert(p == NULL, err_msg("Not NULL " PTR_FORMAT ,p)); |
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461 return false; |
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462 } else { |
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463 return !hr->isHumongous(); |
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464 } |
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465 } |
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466 |
342 | 467 void G1CollectedHeap::check_ct_logs_at_safepoint() { |
468 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
12343 | 469 CardTableModRefBS* ct_bs = g1_barrier_set(); |
342 | 470 |
471 // Count the dirty cards at the start. | |
472 CountNonCleanMemRegionClosure count1(this); | |
473 ct_bs->mod_card_iterate(&count1); | |
474 int orig_count = count1.n(); | |
475 | |
476 // First clear the logged cards. | |
477 ClearLoggedCardTableEntryClosure clear; | |
478 dcqs.set_closure(&clear); | |
479 dcqs.apply_closure_to_all_completed_buffers(); | |
480 dcqs.iterate_closure_all_threads(false); | |
481 clear.print_histo(); | |
482 | |
483 // Now ensure that there's no dirty cards. | |
484 CountNonCleanMemRegionClosure count2(this); | |
485 ct_bs->mod_card_iterate(&count2); | |
486 if (count2.n() != 0) { | |
487 gclog_or_tty->print_cr("Card table has %d entries; %d originally", | |
488 count2.n(), orig_count); | |
489 } | |
490 guarantee(count2.n() == 0, "Card table should be clean."); | |
491 | |
492 RedirtyLoggedCardTableEntryClosure redirty; | |
493 JavaThread::dirty_card_queue_set().set_closure(&redirty); | |
494 dcqs.apply_closure_to_all_completed_buffers(); | |
495 dcqs.iterate_closure_all_threads(false); | |
496 gclog_or_tty->print_cr("Log entries = %d, dirty cards = %d.", | |
497 clear.calls(), orig_count); | |
498 guarantee(redirty.calls() == clear.calls(), | |
499 "Or else mechanism is broken."); | |
500 | |
501 CountNonCleanMemRegionClosure count3(this); | |
502 ct_bs->mod_card_iterate(&count3); | |
503 if (count3.n() != orig_count) { | |
504 gclog_or_tty->print_cr("Should have restored them all: orig = %d, final = %d.", | |
505 orig_count, count3.n()); | |
506 guarantee(count3.n() >= orig_count, "Should have restored them all."); | |
507 } | |
508 | |
509 JavaThread::dirty_card_queue_set().set_closure(_refine_cte_cl); | |
510 } | |
511 | |
512 // Private class members. | |
513 | |
514 G1CollectedHeap* G1CollectedHeap::_g1h; | |
515 | |
516 // Private methods. | |
517 | |
2152 | 518 HeapRegion* |
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519 G1CollectedHeap::new_region_try_secondary_free_list(bool is_old) { |
2152 | 520 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
521 while (!_secondary_free_list.is_empty() || free_regions_coming()) { | |
522 if (!_secondary_free_list.is_empty()) { | |
523 if (G1ConcRegionFreeingVerbose) { | |
524 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
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525 "secondary_free_list has %u entries", |
2152 | 526 _secondary_free_list.length()); |
527 } | |
528 // It looks as if there are free regions available on the | |
529 // secondary_free_list. Let's move them to the free_list and try | |
530 // again to allocate from it. | |
531 append_secondary_free_list(); | |
532 | |
533 assert(!_free_list.is_empty(), "if the secondary_free_list was not " | |
534 "empty we should have moved at least one entry to the free_list"); | |
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535 HeapRegion* res = _free_list.remove_region(is_old); |
2152 | 536 if (G1ConcRegionFreeingVerbose) { |
537 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
538 "allocated "HR_FORMAT" from secondary_free_list", | |
539 HR_FORMAT_PARAMS(res)); | |
540 } | |
541 return res; | |
542 } | |
543 | |
10405 | 544 // Wait here until we get notified either when (a) there are no |
2152 | 545 // more free regions coming or (b) some regions have been moved on |
546 // the secondary_free_list. | |
547 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
548 } | |
549 | |
550 if (G1ConcRegionFreeingVerbose) { | |
551 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
552 "could not allocate from secondary_free_list"); | |
553 } | |
554 return NULL; | |
555 } | |
556 | |
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557 HeapRegion* G1CollectedHeap::new_region(size_t word_size, bool is_old, bool do_expand) { |
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558 assert(!isHumongous(word_size) || word_size <= HeapRegion::GrainWords, |
2152 | 559 "the only time we use this to allocate a humongous region is " |
560 "when we are allocating a single humongous region"); | |
561 | |
562 HeapRegion* res; | |
563 if (G1StressConcRegionFreeing) { | |
564 if (!_secondary_free_list.is_empty()) { | |
565 if (G1ConcRegionFreeingVerbose) { | |
566 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
567 "forced to look at the secondary_free_list"); | |
568 } | |
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569 res = new_region_try_secondary_free_list(is_old); |
2152 | 570 if (res != NULL) { |
571 return res; | |
572 } | |
573 } | |
574 } | |
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575 |
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576 res = _free_list.remove_region(is_old); |
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577 |
2152 | 578 if (res == NULL) { |
579 if (G1ConcRegionFreeingVerbose) { | |
580 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
581 "res == NULL, trying the secondary_free_list"); | |
582 } | |
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583 res = new_region_try_secondary_free_list(is_old); |
2152 | 584 } |
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585 if (res == NULL && do_expand && _expand_heap_after_alloc_failure) { |
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586 // Currently, only attempts to allocate GC alloc regions set |
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587 // do_expand to true. So, we should only reach here during a |
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588 // safepoint. If this assumption changes we might have to |
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589 // reconsider the use of _expand_heap_after_alloc_failure. |
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590 assert(SafepointSynchronize::is_at_safepoint(), "invariant"); |
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591 |
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592 ergo_verbose1(ErgoHeapSizing, |
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593 "attempt heap expansion", |
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594 ergo_format_reason("region allocation request failed") |
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595 ergo_format_byte("allocation request"), |
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596 word_size * HeapWordSize); |
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597 if (expand(word_size * HeapWordSize)) { |
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598 // Given that expand() succeeded in expanding the heap, and we |
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599 // always expand the heap by an amount aligned to the heap |
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600 // region size, the free list should in theory not be empty. |
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601 // In either case remove_region() will check for NULL. |
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602 res = _free_list.remove_region(is_old); |
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603 } else { |
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604 _expand_heap_after_alloc_failure = false; |
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605 } |
342 | 606 } |
607 return res; | |
608 } | |
609 | |
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610 uint G1CollectedHeap::humongous_obj_allocate_find_first(uint num_regions, |
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611 size_t word_size) { |
2361 | 612 assert(isHumongous(word_size), "word_size should be humongous"); |
613 assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); | |
614 | |
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615 uint first = G1_NULL_HRS_INDEX; |
2152 | 616 if (num_regions == 1) { |
617 // Only one region to allocate, no need to go through the slower | |
10405 | 618 // path. The caller will attempt the expansion if this fails, so |
2152 | 619 // let's not try to expand here too. |
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620 HeapRegion* hr = new_region(word_size, true /* is_old */, false /* do_expand */); |
2152 | 621 if (hr != NULL) { |
622 first = hr->hrs_index(); | |
623 } else { | |
3766 | 624 first = G1_NULL_HRS_INDEX; |
2152 | 625 } |
626 } else { | |
627 // We can't allocate humongous regions while cleanupComplete() is | |
628 // running, since some of the regions we find to be empty might not | |
629 // yet be added to the free list and it is not straightforward to | |
630 // know which list they are on so that we can remove them. Note | |
631 // that we only need to do this if we need to allocate more than | |
632 // one region to satisfy the current humongous allocation | |
633 // request. If we are only allocating one region we use the common | |
634 // region allocation code (see above). | |
635 wait_while_free_regions_coming(); | |
2361 | 636 append_secondary_free_list_if_not_empty_with_lock(); |
2152 | 637 |
638 if (free_regions() >= num_regions) { | |
3766 | 639 first = _hrs.find_contiguous(num_regions); |
640 if (first != G1_NULL_HRS_INDEX) { | |
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641 for (uint i = first; i < first + num_regions; ++i) { |
3766 | 642 HeapRegion* hr = region_at(i); |
2152 | 643 assert(hr->is_empty(), "sanity"); |
2361 | 644 assert(is_on_master_free_list(hr), "sanity"); |
2152 | 645 hr->set_pending_removal(true); |
646 } | |
647 _free_list.remove_all_pending(num_regions); | |
648 } | |
649 } | |
650 } | |
651 return first; | |
652 } | |
653 | |
2361 | 654 HeapWord* |
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655 G1CollectedHeap::humongous_obj_allocate_initialize_regions(uint first, |
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656 uint num_regions, |
2361 | 657 size_t word_size) { |
3766 | 658 assert(first != G1_NULL_HRS_INDEX, "pre-condition"); |
2361 | 659 assert(isHumongous(word_size), "word_size should be humongous"); |
660 assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); | |
661 | |
662 // Index of last region in the series + 1. | |
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663 uint last = first + num_regions; |
2361 | 664 |
665 // We need to initialize the region(s) we just discovered. This is | |
666 // a bit tricky given that it can happen concurrently with | |
667 // refinement threads refining cards on these regions and | |
668 // potentially wanting to refine the BOT as they are scanning | |
669 // those cards (this can happen shortly after a cleanup; see CR | |
670 // 6991377). So we have to set up the region(s) carefully and in | |
671 // a specific order. | |
672 | |
673 // The word size sum of all the regions we will allocate. | |
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674 size_t word_size_sum = (size_t) num_regions * HeapRegion::GrainWords; |
2361 | 675 assert(word_size <= word_size_sum, "sanity"); |
676 | |
677 // This will be the "starts humongous" region. | |
3766 | 678 HeapRegion* first_hr = region_at(first); |
2361 | 679 // The header of the new object will be placed at the bottom of |
680 // the first region. | |
681 HeapWord* new_obj = first_hr->bottom(); | |
682 // This will be the new end of the first region in the series that | |
10405 | 683 // should also match the end of the last region in the series. |
2361 | 684 HeapWord* new_end = new_obj + word_size_sum; |
685 // This will be the new top of the first region that will reflect | |
686 // this allocation. | |
687 HeapWord* new_top = new_obj + word_size; | |
688 | |
689 // First, we need to zero the header of the space that we will be | |
690 // allocating. When we update top further down, some refinement | |
691 // threads might try to scan the region. By zeroing the header we | |
692 // ensure that any thread that will try to scan the region will | |
693 // come across the zero klass word and bail out. | |
694 // | |
695 // NOTE: It would not have been correct to have used | |
696 // CollectedHeap::fill_with_object() and make the space look like | |
697 // an int array. The thread that is doing the allocation will | |
698 // later update the object header to a potentially different array | |
699 // type and, for a very short period of time, the klass and length | |
700 // fields will be inconsistent. This could cause a refinement | |
701 // thread to calculate the object size incorrectly. | |
702 Copy::fill_to_words(new_obj, oopDesc::header_size(), 0); | |
703 | |
704 // We will set up the first region as "starts humongous". This | |
705 // will also update the BOT covering all the regions to reflect | |
706 // that there is a single object that starts at the bottom of the | |
707 // first region. | |
708 first_hr->set_startsHumongous(new_top, new_end); | |
709 | |
710 // Then, if there are any, we will set up the "continues | |
711 // humongous" regions. | |
712 HeapRegion* hr = NULL; | |
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713 for (uint i = first + 1; i < last; ++i) { |
3766 | 714 hr = region_at(i); |
2361 | 715 hr->set_continuesHumongous(first_hr); |
716 } | |
717 // If we have "continues humongous" regions (hr != NULL), then the | |
718 // end of the last one should match new_end. | |
719 assert(hr == NULL || hr->end() == new_end, "sanity"); | |
720 | |
721 // Up to this point no concurrent thread would have been able to | |
722 // do any scanning on any region in this series. All the top | |
723 // fields still point to bottom, so the intersection between | |
724 // [bottom,top] and [card_start,card_end] will be empty. Before we | |
725 // update the top fields, we'll do a storestore to make sure that | |
726 // no thread sees the update to top before the zeroing of the | |
727 // object header and the BOT initialization. | |
728 OrderAccess::storestore(); | |
729 | |
730 // Now that the BOT and the object header have been initialized, | |
731 // we can update top of the "starts humongous" region. | |
732 assert(first_hr->bottom() < new_top && new_top <= first_hr->end(), | |
733 "new_top should be in this region"); | |
734 first_hr->set_top(new_top); | |
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735 if (_hr_printer.is_active()) { |
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736 HeapWord* bottom = first_hr->bottom(); |
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737 HeapWord* end = first_hr->orig_end(); |
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738 if ((first + 1) == last) { |
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739 // the series has a single humongous region |
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740 _hr_printer.alloc(G1HRPrinter::SingleHumongous, first_hr, new_top); |
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741 } else { |
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742 // the series has more than one humongous regions |
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743 _hr_printer.alloc(G1HRPrinter::StartsHumongous, first_hr, end); |
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744 } |
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745 } |
2361 | 746 |
747 // Now, we will update the top fields of the "continues humongous" | |
748 // regions. The reason we need to do this is that, otherwise, | |
749 // these regions would look empty and this will confuse parts of | |
750 // G1. For example, the code that looks for a consecutive number | |
751 // of empty regions will consider them empty and try to | |
752 // re-allocate them. We can extend is_empty() to also include | |
753 // !continuesHumongous(), but it is easier to just update the top | |
754 // fields here. The way we set top for all regions (i.e., top == | |
755 // end for all regions but the last one, top == new_top for the | |
756 // last one) is actually used when we will free up the humongous | |
757 // region in free_humongous_region(). | |
758 hr = NULL; | |
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759 for (uint i = first + 1; i < last; ++i) { |
3766 | 760 hr = region_at(i); |
2361 | 761 if ((i + 1) == last) { |
762 // last continues humongous region | |
763 assert(hr->bottom() < new_top && new_top <= hr->end(), | |
764 "new_top should fall on this region"); | |
765 hr->set_top(new_top); | |
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766 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, new_top); |
2361 | 767 } else { |
768 // not last one | |
769 assert(new_top > hr->end(), "new_top should be above this region"); | |
770 hr->set_top(hr->end()); | |
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771 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, hr->end()); |
2361 | 772 } |
773 } | |
774 // If we have continues humongous regions (hr != NULL), then the | |
775 // end of the last one should match new_end and its top should | |
776 // match new_top. | |
777 assert(hr == NULL || | |
778 (hr->end() == new_end && hr->top() == new_top), "sanity"); | |
779 | |
780 assert(first_hr->used() == word_size * HeapWordSize, "invariant"); | |
781 _summary_bytes_used += first_hr->used(); | |
782 _humongous_set.add(first_hr); | |
783 | |
784 return new_obj; | |
785 } | |
786 | |
342 | 787 // If could fit into free regions w/o expansion, try. |
788 // Otherwise, if can expand, do so. | |
789 // Otherwise, if using ex regions might help, try with ex given back. | |
1973 | 790 HeapWord* G1CollectedHeap::humongous_obj_allocate(size_t word_size) { |
2152 | 791 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
792 | |
793 verify_region_sets_optional(); | |
342 | 794 |
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795 size_t word_size_rounded = round_to(word_size, HeapRegion::GrainWords); |
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796 uint num_regions = (uint) (word_size_rounded / HeapRegion::GrainWords); |
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797 uint x_num = expansion_regions(); |
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798 uint fs = _hrs.free_suffix(); |
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799 uint first = humongous_obj_allocate_find_first(num_regions, word_size); |
3766 | 800 if (first == G1_NULL_HRS_INDEX) { |
2152 | 801 // The only thing we can do now is attempt expansion. |
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802 if (fs + x_num >= num_regions) { |
2188
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803 // If the number of regions we're trying to allocate for this |
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804 // object is at most the number of regions in the free suffix, |
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805 // then the call to humongous_obj_allocate_find_first() above |
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806 // should have succeeded and we wouldn't be here. |
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807 // |
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808 // We should only be trying to expand when the free suffix is |
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809 // not sufficient for the object _and_ we have some expansion |
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810 // room available. |
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811 assert(num_regions > fs, "earlier allocation should have succeeded"); |
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812 |
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813 ergo_verbose1(ErgoHeapSizing, |
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814 "attempt heap expansion", |
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815 ergo_format_reason("humongous allocation request failed") |
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816 ergo_format_byte("allocation request"), |
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817 word_size * HeapWordSize); |
2188
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818 if (expand((num_regions - fs) * HeapRegion::GrainBytes)) { |
3766 | 819 // Even though the heap was expanded, it might not have |
820 // reached the desired size. So, we cannot assume that the | |
821 // allocation will succeed. | |
2188
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822 first = humongous_obj_allocate_find_first(num_regions, word_size); |
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823 } |
2152 | 824 } |
825 } | |
826 | |
2361 | 827 HeapWord* result = NULL; |
3766 | 828 if (first != G1_NULL_HRS_INDEX) { |
2361 | 829 result = |
830 humongous_obj_allocate_initialize_regions(first, num_regions, word_size); | |
831 assert(result != NULL, "it should always return a valid result"); | |
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832 |
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833 // A successful humongous object allocation changes the used space |
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834 // information of the old generation so we need to recalculate the |
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835 // sizes and update the jstat counters here. |
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836 g1mm()->update_sizes(); |
2152 | 837 } |
838 | |
839 verify_region_sets_optional(); | |
2361 | 840 |
841 return result; | |
342 | 842 } |
843 | |
1973 | 844 HeapWord* G1CollectedHeap::allocate_new_tlab(size_t word_size) { |
845 assert_heap_not_locked_and_not_at_safepoint(); | |
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846 assert(!isHumongous(word_size), "we do not allow humongous TLABs"); |
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847 |
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848 unsigned int dummy_gc_count_before; |
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849 int dummy_gclocker_retry_count = 0; |
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850 return attempt_allocation(word_size, &dummy_gc_count_before, &dummy_gclocker_retry_count); |
342 | 851 } |
852 | |
853 HeapWord* | |
854 G1CollectedHeap::mem_allocate(size_t word_size, | |
1973 | 855 bool* gc_overhead_limit_was_exceeded) { |
856 assert_heap_not_locked_and_not_at_safepoint(); | |
342 | 857 |
10405 | 858 // Loop until the allocation is satisfied, or unsatisfied after GC. |
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859 for (int try_count = 1, gclocker_retry_count = 0; /* we'll return */; try_count += 1) { |
1973 | 860 unsigned int gc_count_before; |
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861 |
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862 HeapWord* result = NULL; |
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863 if (!isHumongous(word_size)) { |
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864 result = attempt_allocation(word_size, &gc_count_before, &gclocker_retry_count); |
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865 } else { |
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866 result = attempt_allocation_humongous(word_size, &gc_count_before, &gclocker_retry_count); |
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867 } |
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868 if (result != NULL) { |
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869 return result; |
342 | 870 } |
871 | |
872 // Create the garbage collection operation... | |
1973 | 873 VM_G1CollectForAllocation op(gc_count_before, word_size); |
342 | 874 // ...and get the VM thread to execute it. |
875 VMThread::execute(&op); | |
1973 | 876 |
877 if (op.prologue_succeeded() && op.pause_succeeded()) { | |
878 // If the operation was successful we'll return the result even | |
879 // if it is NULL. If the allocation attempt failed immediately | |
880 // after a Full GC, it's unlikely we'll be able to allocate now. | |
881 HeapWord* result = op.result(); | |
882 if (result != NULL && !isHumongous(word_size)) { | |
883 // Allocations that take place on VM operations do not do any | |
884 // card dirtying and we have to do it here. We only have to do | |
885 // this for non-humongous allocations, though. | |
886 dirty_young_block(result, word_size); | |
887 } | |
342 | 888 return result; |
1973 | 889 } else { |
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890 if (gclocker_retry_count > GCLockerRetryAllocationCount) { |
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891 return NULL; |
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892 } |
1973 | 893 assert(op.result() == NULL, |
894 "the result should be NULL if the VM op did not succeed"); | |
342 | 895 } |
896 | |
897 // Give a warning if we seem to be looping forever. | |
898 if ((QueuedAllocationWarningCount > 0) && | |
899 (try_count % QueuedAllocationWarningCount == 0)) { | |
1973 | 900 warning("G1CollectedHeap::mem_allocate retries %d times", try_count); |
342 | 901 } |
902 } | |
1973 | 903 |
904 ShouldNotReachHere(); | |
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905 return NULL; |
342 | 906 } |
907 | |
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908 HeapWord* G1CollectedHeap::attempt_allocation_slow(size_t word_size, |
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909 unsigned int *gc_count_before_ret, |
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910 int* gclocker_retry_count_ret) { |
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911 // Make sure you read the note in attempt_allocation_humongous(). |
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912 |
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913 assert_heap_not_locked_and_not_at_safepoint(); |
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914 assert(!isHumongous(word_size), "attempt_allocation_slow() should not " |
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915 "be called for humongous allocation requests"); |
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916 |
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917 // We should only get here after the first-level allocation attempt |
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918 // (attempt_allocation()) failed to allocate. |
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919 |
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920 // We will loop until a) we manage to successfully perform the |
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921 // allocation or b) we successfully schedule a collection which |
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922 // fails to perform the allocation. b) is the only case when we'll |
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|
923 // return NULL. |
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924 HeapWord* result = NULL; |
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925 for (int try_count = 1; /* we'll return */; try_count += 1) { |
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|
926 bool should_try_gc; |
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|
927 unsigned int gc_count_before; |
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|
928 |
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|
929 { |
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|
930 MutexLockerEx x(Heap_lock); |
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|
931 |
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|
932 result = _mutator_alloc_region.attempt_allocation_locked(word_size, |
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|
933 false /* bot_updates */); |
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934 if (result != NULL) { |
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|
935 return result; |
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|
936 } |
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|
937 |
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|
938 // If we reach here, attempt_allocation_locked() above failed to |
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|
939 // allocate a new region. So the mutator alloc region should be NULL. |
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940 assert(_mutator_alloc_region.get() == NULL, "only way to get here"); |
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|
941 |
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942 if (GC_locker::is_active_and_needs_gc()) { |
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943 if (g1_policy()->can_expand_young_list()) { |
3914
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944 // No need for an ergo verbose message here, |
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945 // can_expand_young_list() does this when it returns true. |
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946 result = _mutator_alloc_region.attempt_allocation_force(word_size, |
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|
947 false /* bot_updates */); |
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|
948 if (result != NULL) { |
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|
949 return result; |
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|
950 } |
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|
951 } |
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952 should_try_gc = false; |
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953 } else { |
6106
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954 // The GCLocker may not be active but the GCLocker initiated |
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955 // GC may not yet have been performed (GCLocker::needs_gc() |
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956 // returns true). In this case we do not try this GC and |
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957 // wait until the GCLocker initiated GC is performed, and |
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958 // then retry the allocation. |
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959 if (GC_locker::needs_gc()) { |
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960 should_try_gc = false; |
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961 } else { |
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962 // Read the GC count while still holding the Heap_lock. |
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963 gc_count_before = total_collections(); |
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964 should_try_gc = true; |
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|
965 } |
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|
966 } |
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|
967 } |
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|
968 |
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969 if (should_try_gc) { |
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970 bool succeeded; |
12113
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|
971 result = do_collection_pause(word_size, gc_count_before, &succeeded, |
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|
972 GCCause::_g1_inc_collection_pause); |
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973 if (result != NULL) { |
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974 assert(succeeded, "only way to get back a non-NULL result"); |
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975 return result; |
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976 } |
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977 |
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978 if (succeeded) { |
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979 // If we get here we successfully scheduled a collection which |
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980 // failed to allocate. No point in trying to allocate |
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981 // further. We'll just return NULL. |
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982 MutexLockerEx x(Heap_lock); |
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983 *gc_count_before_ret = total_collections(); |
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984 return NULL; |
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985 } |
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986 } else { |
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987 if (*gclocker_retry_count_ret > GCLockerRetryAllocationCount) { |
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988 MutexLockerEx x(Heap_lock); |
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989 *gc_count_before_ret = total_collections(); |
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990 return NULL; |
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991 } |
6106
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992 // The GCLocker is either active or the GCLocker initiated |
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993 // GC has not yet been performed. Stall until it is and |
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994 // then retry the allocation. |
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995 GC_locker::stall_until_clear(); |
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996 (*gclocker_retry_count_ret) += 1; |
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997 } |
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998 |
10405 | 999 // We can reach here if we were unsuccessful in scheduling a |
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1000 // collection (because another thread beat us to it) or if we were |
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1001 // stalled due to the GC locker. In either can we should retry the |
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1002 // allocation attempt in case another thread successfully |
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1003 // performed a collection and reclaimed enough space. We do the |
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1004 // first attempt (without holding the Heap_lock) here and the |
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1005 // follow-on attempt will be at the start of the next loop |
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1006 // iteration (after taking the Heap_lock). |
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1007 result = _mutator_alloc_region.attempt_allocation(word_size, |
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1008 false /* bot_updates */); |
5963
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1009 if (result != NULL) { |
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1010 return result; |
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1011 } |
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1012 |
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1013 // Give a warning if we seem to be looping forever. |
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1014 if ((QueuedAllocationWarningCount > 0) && |
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1015 (try_count % QueuedAllocationWarningCount == 0)) { |
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1016 warning("G1CollectedHeap::attempt_allocation_slow() " |
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1017 "retries %d times", try_count); |
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1018 } |
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1019 } |
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1020 |
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1021 ShouldNotReachHere(); |
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1022 return NULL; |
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1023 } |
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|
1024 |
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1025 HeapWord* G1CollectedHeap::attempt_allocation_humongous(size_t word_size, |
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1026 unsigned int * gc_count_before_ret, |
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1027 int* gclocker_retry_count_ret) { |
2433
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1028 // The structure of this method has a lot of similarities to |
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1029 // attempt_allocation_slow(). The reason these two were not merged |
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1030 // into a single one is that such a method would require several "if |
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1031 // allocation is not humongous do this, otherwise do that" |
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1032 // conditional paths which would obscure its flow. In fact, an early |
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1033 // version of this code did use a unified method which was harder to |
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1034 // follow and, as a result, it had subtle bugs that were hard to |
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1035 // track down. So keeping these two methods separate allows each to |
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1036 // be more readable. It will be good to keep these two in sync as |
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1037 // much as possible. |
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|
1038 |
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|
1039 assert_heap_not_locked_and_not_at_safepoint(); |
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1040 assert(isHumongous(word_size), "attempt_allocation_humongous() " |
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1041 "should only be called for humongous allocations"); |
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|
1042 |
4834
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1043 // Humongous objects can exhaust the heap quickly, so we should check if we |
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|
1044 // need to start a marking cycle at each humongous object allocation. We do |
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|
1045 // the check before we do the actual allocation. The reason for doing it |
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|
1046 // before the allocation is that we avoid having to keep track of the newly |
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|
1047 // allocated memory while we do a GC. |
4910
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|
1048 if (g1_policy()->need_to_start_conc_mark("concurrent humongous allocation", |
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|
1049 word_size)) { |
4834
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|
1050 collect(GCCause::_g1_humongous_allocation); |
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|
1051 } |
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|
1052 |
2433
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1053 // We will loop until a) we manage to successfully perform the |
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1054 // allocation or b) we successfully schedule a collection which |
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|
1055 // fails to perform the allocation. b) is the only case when we'll |
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|
1056 // return NULL. |
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|
1057 HeapWord* result = NULL; |
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|
1058 for (int try_count = 1; /* we'll return */; try_count += 1) { |
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|
1059 bool should_try_gc; |
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|
1060 unsigned int gc_count_before; |
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|
1061 |
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|
1062 { |
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|
1063 MutexLockerEx x(Heap_lock); |
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|
1064 |
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|
1065 // Given that humongous objects are not allocated in young |
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1066 // regions, we'll first try to do the allocation without doing a |
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1067 // collection hoping that there's enough space in the heap. |
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|
1068 result = humongous_obj_allocate(word_size); |
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|
1069 if (result != NULL) { |
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|
1070 return result; |
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|
1071 } |
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|
1072 |
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|
1073 if (GC_locker::is_active_and_needs_gc()) { |
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|
1074 should_try_gc = false; |
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|
1075 } else { |
6106
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|
1076 // The GCLocker may not be active but the GCLocker initiated |
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|
1077 // GC may not yet have been performed (GCLocker::needs_gc() |
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|
1078 // returns true). In this case we do not try this GC and |
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|
1079 // wait until the GCLocker initiated GC is performed, and |
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|
1080 // then retry the allocation. |
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|
1081 if (GC_locker::needs_gc()) { |
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|
1082 should_try_gc = false; |
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|
1083 } else { |
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|
1084 // Read the GC count while still holding the Heap_lock. |
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|
1085 gc_count_before = total_collections(); |
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|
1086 should_try_gc = true; |
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|
1087 } |
2433
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|
1088 } |
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|
1089 } |
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|
1090 |
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|
1091 if (should_try_gc) { |
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|
1092 // If we failed to allocate the humongous object, we should try to |
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|
1093 // do a collection pause (if we're allowed) in case it reclaims |
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|
1094 // enough space for the allocation to succeed after the pause. |
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|
1095 |
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|
1096 bool succeeded; |
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1097 result = do_collection_pause(word_size, gc_count_before, &succeeded, |
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1098 GCCause::_g1_humongous_allocation); |
2433
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1099 if (result != NULL) { |
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1100 assert(succeeded, "only way to get back a non-NULL result"); |
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1101 return result; |
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1102 } |
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1103 |
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1104 if (succeeded) { |
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1105 // If we get here we successfully scheduled a collection which |
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1106 // failed to allocate. No point in trying to allocate |
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1107 // further. We'll just return NULL. |
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1108 MutexLockerEx x(Heap_lock); |
4910
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1109 *gc_count_before_ret = total_collections(); |
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1110 return NULL; |
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1111 } |
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1112 } else { |
8853
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1113 if (*gclocker_retry_count_ret > GCLockerRetryAllocationCount) { |
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1114 MutexLockerEx x(Heap_lock); |
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1115 *gc_count_before_ret = total_collections(); |
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1116 return NULL; |
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1117 } |
6106
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1118 // The GCLocker is either active or the GCLocker initiated |
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1119 // GC has not yet been performed. Stall until it is and |
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1120 // then retry the allocation. |
2433
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1121 GC_locker::stall_until_clear(); |
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1122 (*gclocker_retry_count_ret) += 1; |
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1123 } |
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1124 |
10405 | 1125 // We can reach here if we were unsuccessful in scheduling a |
2433
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1126 // collection (because another thread beat us to it) or if we were |
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1127 // stalled due to the GC locker. In either can we should retry the |
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1128 // allocation attempt in case another thread successfully |
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1129 // performed a collection and reclaimed enough space. Give a |
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1130 // warning if we seem to be looping forever. |
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1131 |
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1132 if ((QueuedAllocationWarningCount > 0) && |
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1133 (try_count % QueuedAllocationWarningCount == 0)) { |
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1134 warning("G1CollectedHeap::attempt_allocation_humongous() " |
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1135 "retries %d times", try_count); |
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1136 } |
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1137 } |
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1138 |
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1139 ShouldNotReachHere(); |
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1140 return NULL; |
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1141 } |
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1142 |
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1143 HeapWord* G1CollectedHeap::attempt_allocation_at_safepoint(size_t word_size, |
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1144 bool expect_null_mutator_alloc_region) { |
2152 | 1145 assert_at_safepoint(true /* should_be_vm_thread */); |
2433
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1146 assert(_mutator_alloc_region.get() == NULL || |
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1147 !expect_null_mutator_alloc_region, |
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1148 "the current alloc region was unexpectedly found to be non-NULL"); |
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1149 |
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1150 if (!isHumongous(word_size)) { |
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1151 return _mutator_alloc_region.attempt_allocation_locked(word_size, |
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1152 false /* bot_updates */); |
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1153 } else { |
4829
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1154 HeapWord* result = humongous_obj_allocate(word_size); |
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1155 if (result != NULL && g1_policy()->need_to_start_conc_mark("STW humongous allocation")) { |
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1156 g1_policy()->set_initiate_conc_mark_if_possible(); |
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1157 } |
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1158 return result; |
2433
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1159 } |
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1160 |
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1161 ShouldNotReachHere(); |
342 | 1162 } |
1163 | |
1164 class PostMCRemSetClearClosure: public HeapRegionClosure { | |
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1165 G1CollectedHeap* _g1h; |
342 | 1166 ModRefBarrierSet* _mr_bs; |
1167 public: | |
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1168 PostMCRemSetClearClosure(G1CollectedHeap* g1h, ModRefBarrierSet* mr_bs) : |
12080 | 1169 _g1h(g1h), _mr_bs(mr_bs) {} |
1170 | |
342 | 1171 bool doHeapRegion(HeapRegion* r) { |
12080 | 1172 HeapRegionRemSet* hrrs = r->rem_set(); |
1173 | |
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1174 if (r->continuesHumongous()) { |
12080 | 1175 // We'll assert that the strong code root list and RSet is empty |
1176 assert(hrrs->strong_code_roots_list_length() == 0, "sanity"); | |
1177 assert(hrrs->occupied() == 0, "RSet should be empty"); | |
342 | 1178 return false; |
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1179 } |
12080 | 1180 |
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1181 _g1h->reset_gc_time_stamps(r); |
12080 | 1182 hrrs->clear(); |
342 | 1183 // You might think here that we could clear just the cards |
1184 // corresponding to the used region. But no: if we leave a dirty card | |
1185 // in a region we might allocate into, then it would prevent that card | |
1186 // from being enqueued, and cause it to be missed. | |
1187 // Re: the performance cost: we shouldn't be doing full GC anyway! | |
1188 _mr_bs->clear(MemRegion(r->bottom(), r->end())); | |
12080 | 1189 |
342 | 1190 return false; |
1191 } | |
1192 }; | |
1193 | |
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1194 void G1CollectedHeap::clear_rsets_post_compaction() { |
12343 | 1195 PostMCRemSetClearClosure rs_clear(this, g1_barrier_set()); |
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1196 heap_region_iterate(&rs_clear); |
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1197 } |
342 | 1198 |
626
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1199 class RebuildRSOutOfRegionClosure: public HeapRegionClosure { |
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1200 G1CollectedHeap* _g1h; |
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|
1201 UpdateRSOopClosure _cl; |
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|
1202 int _worker_i; |
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|
1203 public: |
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|
1204 RebuildRSOutOfRegionClosure(G1CollectedHeap* g1, int worker_i = 0) : |
1861 | 1205 _cl(g1->g1_rem_set(), worker_i), |
626
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1206 _worker_i(worker_i), |
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1207 _g1h(g1) |
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|
1208 { } |
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|
1209 |
626
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1210 bool doHeapRegion(HeapRegion* r) { |
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1211 if (!r->continuesHumongous()) { |
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1212 _cl.set_from(r); |
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1213 r->oop_iterate(&_cl); |
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|
1214 } |
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1215 return false; |
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|
1216 } |
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|
1217 }; |
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|
1218 |
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1219 class ParRebuildRSTask: public AbstractGangTask { |
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1220 G1CollectedHeap* _g1; |
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1221 public: |
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1222 ParRebuildRSTask(G1CollectedHeap* g1) |
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1223 : AbstractGangTask("ParRebuildRSTask"), |
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1224 _g1(g1) |
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1225 { } |
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|
1226 |
4728
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1227 void work(uint worker_id) { |
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|
1228 RebuildRSOutOfRegionClosure rebuild_rs(_g1, worker_id); |
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1229 _g1->heap_region_par_iterate_chunked(&rebuild_rs, worker_id, |
4095
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1230 _g1->workers()->active_workers(), |
626
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|
1231 HeapRegion::RebuildRSClaimValue); |
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|
1232 } |
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1233 }; |
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|
1234 |
3778
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1235 class PostCompactionPrinterClosure: public HeapRegionClosure { |
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1236 private: |
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1237 G1HRPrinter* _hr_printer; |
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1238 public: |
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1239 bool doHeapRegion(HeapRegion* hr) { |
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1240 assert(!hr->is_young(), "not expecting to find young regions"); |
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1241 // We only generate output for non-empty regions. |
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1242 if (!hr->is_empty()) { |
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1243 if (!hr->isHumongous()) { |
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1244 _hr_printer->post_compaction(hr, G1HRPrinter::Old); |
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|
1245 } else if (hr->startsHumongous()) { |
6254
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1246 if (hr->region_num() == 1) { |
3778
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|
1247 // single humongous region |
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|
1248 _hr_printer->post_compaction(hr, G1HRPrinter::SingleHumongous); |
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1249 } else { |
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|
1250 _hr_printer->post_compaction(hr, G1HRPrinter::StartsHumongous); |
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|
1251 } |
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|
1252 } else { |
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|
1253 assert(hr->continuesHumongous(), "only way to get here"); |
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|
1254 _hr_printer->post_compaction(hr, G1HRPrinter::ContinuesHumongous); |
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1255 } |
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|
1256 } |
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|
1257 return false; |
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|
1258 } |
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|
1259 |
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|
1260 PostCompactionPrinterClosure(G1HRPrinter* hr_printer) |
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1261 : _hr_printer(hr_printer) { } |
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1262 }; |
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1263 |
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1264 void G1CollectedHeap::print_hrs_post_compaction() { |
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1265 PostCompactionPrinterClosure cl(hr_printer()); |
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|
1266 heap_region_iterate(&cl); |
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1267 } |
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1268 |
1973 | 1269 bool G1CollectedHeap::do_collection(bool explicit_gc, |
1656
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|
1270 bool clear_all_soft_refs, |
342 | 1271 size_t word_size) { |
2152 | 1272 assert_at_safepoint(true /* should_be_vm_thread */); |
1273 | |
1359
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|
1274 if (GC_locker::check_active_before_gc()) { |
1973 | 1275 return false; |
1359
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diff
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1276 } |
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1277 |
10405 | 1278 STWGCTimer* gc_timer = G1MarkSweep::gc_timer(); |
13400
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|
1279 gc_timer->register_gc_start(); |
10405 | 1280 |
1281 SerialOldTracer* gc_tracer = G1MarkSweep::gc_tracer(); | |
1282 gc_tracer->report_gc_start(gc_cause(), gc_timer->gc_start()); | |
1283 | |
2125
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diff
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|
1284 SvcGCMarker sgcm(SvcGCMarker::FULL); |
342 | 1285 ResourceMark rm; |
1286 | |
4872
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|
1287 print_heap_before_gc(); |
10405 | 1288 trace_heap_before_gc(gc_tracer); |
838
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6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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|
1289 |
10183
868d87ed63c8
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|
1290 size_t metadata_prev_used = MetaspaceAux::allocated_used_bytes(); |
6725
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6964458: Reimplement class meta-data storage to use native memory
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|
1291 |
2152 | 1292 verify_region_sets_optional(); |
342 | 1293 |
1387
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|
1294 const bool do_clear_all_soft_refs = clear_all_soft_refs || |
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|
1295 collector_policy()->should_clear_all_soft_refs(); |
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|
1296 |
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diff
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|
1297 ClearedAllSoftRefs casr(do_clear_all_soft_refs, collector_policy()); |
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|
1298 |
342 | 1299 { |
1300 IsGCActiveMark x; | |
1301 | |
1302 // Timing | |
6030 | 1303 assert(gc_cause() != GCCause::_java_lang_system_gc || explicit_gc, "invariant"); |
6007
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|
1304 gclog_or_tty->date_stamp(G1Log::fine() && PrintGCDateStamps); |
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|
1305 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
6030 | 1306 |
342 | 1307 { |
10405 | 1308 GCTraceTime t(GCCauseString("Full GC", gc_cause()), G1Log::fine(), true, NULL); |
10098
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1309 TraceCollectorStats tcs(g1mm()->full_collection_counters()); |
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1310 TraceMemoryManagerStats tms(true /* fullGC */, gc_cause()); |
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1311 |
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1312 double start = os::elapsedTime(); |
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1313 g1_policy()->record_full_collection_start(); |
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1314 |
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1315 // Note: When we have a more flexible GC logging framework that |
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1316 // allows us to add optional attributes to a GC log record we |
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1317 // could consider timing and reporting how long we wait in the |
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|
1318 // following two methods. |
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|
1319 wait_while_free_regions_coming(); |
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|
1320 // If we start the compaction before the CM threads finish |
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1321 // scanning the root regions we might trip them over as we'll |
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|
1322 // be moving objects / updating references. So let's wait until |
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|
1323 // they are done. By telling them to abort, they should complete |
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|
1324 // early. |
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|
1325 _cm->root_regions()->abort(); |
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|
1326 _cm->root_regions()->wait_until_scan_finished(); |
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|
1327 append_secondary_free_list_if_not_empty_with_lock(); |
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|
1328 |
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|
1329 gc_prologue(true); |
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|
1330 increment_total_collections(true /* full gc */); |
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|
1331 increment_old_marking_cycles_started(); |
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|
1332 |
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|
1333 assert(used() == recalculate_used(), "Should be equal"); |
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|
1334 |
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|
1335 verify_before_gc(); |
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|
1336 |
10405 | 1337 pre_full_gc_dump(gc_timer); |
10098
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|
1338 |
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|
1339 COMPILER2_PRESENT(DerivedPointerTable::clear()); |
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|
1340 |
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|
1341 // Disable discovery and empty the discovered lists |
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|
1342 // for the CM ref processor. |
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|
1343 ref_processor_cm()->disable_discovery(); |
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|
1344 ref_processor_cm()->abandon_partial_discovery(); |
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|
1345 ref_processor_cm()->verify_no_references_recorded(); |
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|
1346 |
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|
1347 // Abandon current iterations of concurrent marking and concurrent |
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|
1348 // refinement, if any are in progress. We have to do this before |
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|
1349 // wait_until_scan_finished() below. |
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|
1350 concurrent_mark()->abort(); |
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|
1351 |
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|
1352 // Make sure we'll choose a new allocation region afterwards. |
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|
1353 release_mutator_alloc_region(); |
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|
1354 abandon_gc_alloc_regions(); |
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|
1355 g1_rem_set()->cleanupHRRS(); |
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|
1356 |
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|
1357 // We should call this after we retire any currently active alloc |
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|
1358 // regions so that all the ALLOC / RETIRE events are generated |
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|
1359 // before the start GC event. |
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|
1360 _hr_printer.start_gc(true /* full */, (size_t) total_collections()); |
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|
1361 |
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|
1362 // We may have added regions to the current incremental collection |
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|
1363 // set between the last GC or pause and now. We need to clear the |
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|
1364 // incremental collection set and then start rebuilding it afresh |
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|
1365 // after this full GC. |
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|
1366 abandon_collection_set(g1_policy()->inc_cset_head()); |
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|
1367 g1_policy()->clear_incremental_cset(); |
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|
1368 g1_policy()->stop_incremental_cset_building(); |
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|
1369 |
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|
1370 tear_down_region_sets(false /* free_list_only */); |
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|
1371 g1_policy()->set_gcs_are_young(true); |
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|
1372 |
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|
1373 // See the comments in g1CollectedHeap.hpp and |
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|
1374 // G1CollectedHeap::ref_processing_init() about |
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|
1375 // how reference processing currently works in G1. |
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|
1376 |
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|
1377 // Temporarily make discovery by the STW ref processor single threaded (non-MT). |
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|
1378 ReferenceProcessorMTDiscoveryMutator stw_rp_disc_ser(ref_processor_stw(), false); |
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|
1379 |
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|
1380 // Temporarily clear the STW ref processor's _is_alive_non_header field. |
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|
1381 ReferenceProcessorIsAliveMutator stw_rp_is_alive_null(ref_processor_stw(), NULL); |
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|
1382 |
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|
1383 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, true /*verify_no_refs*/); |
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|
1384 ref_processor_stw()->setup_policy(do_clear_all_soft_refs); |
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1385 |
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|
1386 // Do collection work |
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|
1387 { |
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|
1388 HandleMark hm; // Discard invalid handles created during gc |
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|
1389 G1MarkSweep::invoke_at_safepoint(ref_processor_stw(), do_clear_all_soft_refs); |
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|
1390 } |
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|
1391 |
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|
1392 assert(free_regions() == 0, "we should not have added any free regions"); |
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|
1393 rebuild_region_sets(false /* free_list_only */); |
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|
1394 |
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|
1395 // Enqueue any discovered reference objects that have |
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|
1396 // not been removed from the discovered lists. |
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1397 ref_processor_stw()->enqueue_discovered_references(); |
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|
1398 |
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|
1399 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
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|
1400 |
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|
1401 MemoryService::track_memory_usage(); |
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|
1402 |
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|
1403 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
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1404 ref_processor_stw()->verify_no_references_recorded(); |
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1405 |
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1406 // Delete metaspaces for unloaded class loaders and clean up loader_data graph |
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|
1407 ClassLoaderDataGraph::purge(); |
12080 | 1408 MetaspaceAux::verify_metrics(); |
10098
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|
1409 |
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|
1410 // Note: since we've just done a full GC, concurrent |
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1411 // marking is no longer active. Therefore we need not |
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|
1412 // re-enable reference discovery for the CM ref processor. |
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|
1413 // That will be done at the start of the next marking cycle. |
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|
1414 assert(!ref_processor_cm()->discovery_enabled(), "Postcondition"); |
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1415 ref_processor_cm()->verify_no_references_recorded(); |
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|
1416 |
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|
1417 reset_gc_time_stamp(); |
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1418 // Since everything potentially moved, we will clear all remembered |
10405 | 1419 // sets, and clear all cards. Later we will rebuild remembered |
10098
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1420 // sets. We will also reset the GC time stamps of the regions. |
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|
1421 clear_rsets_post_compaction(); |
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|
1422 check_gc_time_stamps(); |
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|
1423 |
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|
1424 // Resize the heap if necessary. |
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|
1425 resize_if_necessary_after_full_collection(explicit_gc ? 0 : word_size); |
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|
1426 |
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|
1427 if (_hr_printer.is_active()) { |
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|
1428 // We should do this after we potentially resize the heap so |
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|
1429 // that all the COMMIT / UNCOMMIT events are generated before |
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|
1430 // the end GC event. |
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|
1431 |
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|
1432 print_hrs_post_compaction(); |
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|
1433 _hr_printer.end_gc(true /* full */, (size_t) total_collections()); |
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|
1434 } |
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|
1435 |
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
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|
1436 G1HotCardCache* hot_card_cache = _cg1r->hot_card_cache(); |
194f52aa2f23
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|
1437 if (hot_card_cache->use_cache()) { |
194f52aa2f23
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|
1438 hot_card_cache->reset_card_counts(); |
194f52aa2f23
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|
1439 hot_card_cache->reset_hot_cache(); |
10098
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|
1440 } |
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|
1441 |
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|
1442 // Rebuild remembered sets of all regions. |
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|
1443 if (G1CollectedHeap::use_parallel_gc_threads()) { |
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|
1444 uint n_workers = |
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|
1445 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
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|
1446 workers()->active_workers(), |
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|
1447 Threads::number_of_non_daemon_threads()); |
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|
1448 assert(UseDynamicNumberOfGCThreads || |
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|
1449 n_workers == workers()->total_workers(), |
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|
1450 "If not dynamic should be using all the workers"); |
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|
1451 workers()->set_active_workers(n_workers); |
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|
1452 // Set parallel threads in the heap (_n_par_threads) only |
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1453 // before a parallel phase and always reset it to 0 after |
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|
1454 // the phase so that the number of parallel threads does |
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|
1455 // no get carried forward to a serial phase where there |
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|
1456 // may be code that is "possibly_parallel". |
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|
1457 set_par_threads(n_workers); |
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|
1458 |
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|
1459 ParRebuildRSTask rebuild_rs_task(this); |
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|
1460 assert(check_heap_region_claim_values( |
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|
1461 HeapRegion::InitialClaimValue), "sanity check"); |
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|
1462 assert(UseDynamicNumberOfGCThreads || |
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|
1463 workers()->active_workers() == workers()->total_workers(), |
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|
1464 "Unless dynamic should use total workers"); |
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|
1465 // Use the most recent number of active workers |
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|
1466 assert(workers()->active_workers() > 0, |
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|
1467 "Active workers not properly set"); |
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|
1468 set_par_threads(workers()->active_workers()); |
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|
1469 workers()->run_task(&rebuild_rs_task); |
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|
1470 set_par_threads(0); |
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|
1471 assert(check_heap_region_claim_values( |
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|
1472 HeapRegion::RebuildRSClaimValue), "sanity check"); |
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|
1473 reset_heap_region_claim_values(); |
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|
1474 } else { |
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|
1475 RebuildRSOutOfRegionClosure rebuild_rs(this); |
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|
1476 heap_region_iterate(&rebuild_rs); |
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|
1477 } |
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|
1478 |
12080 | 1479 // Rebuild the strong code root lists for each region |
1480 rebuild_strong_code_roots(); | |
1481 | |
10098
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|
1482 if (true) { // FIXME |
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|
1483 MetaspaceGC::compute_new_size(); |
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|
1484 } |
342 | 1485 |
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
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545
diff
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|
1486 #ifdef TRACESPINNING |
10098
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|
1487 ParallelTaskTerminator::print_termination_counts(); |
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
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545
diff
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|
1488 #endif |
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
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545
diff
changeset
|
1489 |
10098
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|
1490 // Discard all rset updates |
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|
1491 JavaThread::dirty_card_queue_set().abandon_logs(); |
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|
1492 assert(!G1DeferredRSUpdate |
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|
1493 || (G1DeferredRSUpdate && |
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|
1494 (dirty_card_queue_set().completed_buffers_num() == 0)), "Should not be any"); |
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|
1495 |
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|
1496 _young_list->reset_sampled_info(); |
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|
1497 // At this point there should be no regions in the |
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|
1498 // entire heap tagged as young. |
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|
1499 assert(check_young_list_empty(true /* check_heap */), |
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|
1500 "young list should be empty at this point"); |
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|
1501 |
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|
1502 // Update the number of full collections that have been completed. |
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|
1503 increment_old_marking_cycles_completed(false /* concurrent */); |
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|
1504 |
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|
1505 _hrs.verify_optional(); |
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|
1506 verify_region_sets_optional(); |
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|
1507 |
10373
3a4805ad0005
8015244: G1: Verification after a full GC is incorrectly placed.
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diff
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|
1508 verify_after_gc(); |
3a4805ad0005
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diff
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|
1509 |
10098
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|
1510 // Start a new incremental collection set for the next pause |
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|
1511 assert(g1_policy()->collection_set() == NULL, "must be"); |
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|
1512 g1_policy()->start_incremental_cset_building(); |
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1513 |
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1514 // Clear the _cset_fast_test bitmap in anticipation of adding |
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1515 // regions to the incremental collection set for the next |
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1516 // evacuation pause. |
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1517 clear_cset_fast_test(); |
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1518 |
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1519 init_mutator_alloc_region(); |
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1520 |
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1521 double end = os::elapsedTime(); |
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1522 g1_policy()->record_full_collection_end(); |
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1523 |
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1524 if (G1Log::fine()) { |
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1525 g1_policy()->print_heap_transition(); |
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1526 } |
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1527 |
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1528 // We must call G1MonitoringSupport::update_sizes() in the same scoping level |
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1529 // as an active TraceMemoryManagerStats object (i.e. before the destructor for the |
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1530 // TraceMemoryManagerStats is called) so that the G1 memory pools are updated |
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1531 // before any GC notifications are raised. |
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1532 g1mm()->update_sizes(); |
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1533 |
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1534 gc_epilogue(true); |
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1535 } |
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1536 |
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1537 if (G1Log::finer()) { |
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1538 g1_policy()->print_detailed_heap_transition(true /* full */); |
10098
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1539 } |
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1540 |
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1541 print_heap_after_gc(); |
10405 | 1542 trace_heap_after_gc(gc_tracer); |
1543 | |
1544 post_full_gc_dump(gc_timer); | |
1545 | |
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1546 gc_timer->register_gc_end(); |
10405 | 1547 gc_tracer->report_gc_end(gc_timer->gc_end(), gc_timer->time_partitions()); |
10098
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1548 } |
1973 | 1549 |
1550 return true; | |
342 | 1551 } |
1552 | |
1553 void G1CollectedHeap::do_full_collection(bool clear_all_soft_refs) { | |
1973 | 1554 // do_collection() will return whether it succeeded in performing |
1555 // the GC. Currently, there is no facility on the | |
1556 // do_full_collection() API to notify the caller than the collection | |
1557 // did not succeed (e.g., because it was locked out by the GC | |
1558 // locker). So, right now, we'll ignore the return value. | |
1559 bool dummy = do_collection(true, /* explicit_gc */ | |
1560 clear_all_soft_refs, | |
1561 0 /* word_size */); | |
342 | 1562 } |
1563 | |
1564 // This code is mostly copied from TenuredGeneration. | |
1565 void | |
1566 G1CollectedHeap:: | |
1567 resize_if_necessary_after_full_collection(size_t word_size) { | |
1568 // Include the current allocation, if any, and bytes that will be | |
1569 // pre-allocated to support collections, as "used". | |
1570 const size_t used_after_gc = used(); | |
1571 const size_t capacity_after_gc = capacity(); | |
1572 const size_t free_after_gc = capacity_after_gc - used_after_gc; | |
1573 | |
1717
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1574 // This is enforced in arguments.cpp. |
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1575 assert(MinHeapFreeRatio <= MaxHeapFreeRatio, |
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1576 "otherwise the code below doesn't make sense"); |
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1577 |
342 | 1578 // We don't have floating point command-line arguments |
1717
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1579 const double minimum_free_percentage = (double) MinHeapFreeRatio / 100.0; |
342 | 1580 const double maximum_used_percentage = 1.0 - minimum_free_percentage; |
1717
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1581 const double maximum_free_percentage = (double) MaxHeapFreeRatio / 100.0; |
342 | 1582 const double minimum_used_percentage = 1.0 - maximum_free_percentage; |
1583 | |
1717
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1584 const size_t min_heap_size = collector_policy()->min_heap_byte_size(); |
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1585 const size_t max_heap_size = collector_policy()->max_heap_byte_size(); |
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1586 |
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1587 // We have to be careful here as these two calculations can overflow |
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1588 // 32-bit size_t's. |
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1589 double used_after_gc_d = (double) used_after_gc; |
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1590 double minimum_desired_capacity_d = used_after_gc_d / maximum_used_percentage; |
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1591 double maximum_desired_capacity_d = used_after_gc_d / minimum_used_percentage; |
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1592 |
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1593 // Let's make sure that they are both under the max heap size, which |
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1594 // by default will make them fit into a size_t. |
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1595 double desired_capacity_upper_bound = (double) max_heap_size; |
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1596 minimum_desired_capacity_d = MIN2(minimum_desired_capacity_d, |
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1597 desired_capacity_upper_bound); |
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1598 maximum_desired_capacity_d = MIN2(maximum_desired_capacity_d, |
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1599 desired_capacity_upper_bound); |
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1600 |
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1601 // We can now safely turn them into size_t's. |
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1602 size_t minimum_desired_capacity = (size_t) minimum_desired_capacity_d; |
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1603 size_t maximum_desired_capacity = (size_t) maximum_desired_capacity_d; |
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1604 |
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1605 // This assert only makes sense here, before we adjust them |
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1606 // with respect to the min and max heap size. |
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1607 assert(minimum_desired_capacity <= maximum_desired_capacity, |
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1608 err_msg("minimum_desired_capacity = "SIZE_FORMAT", " |
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1609 "maximum_desired_capacity = "SIZE_FORMAT, |
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1610 minimum_desired_capacity, maximum_desired_capacity)); |
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1611 |
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1612 // Should not be greater than the heap max size. No need to adjust |
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1613 // it with respect to the heap min size as it's a lower bound (i.e., |
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1614 // we'll try to make the capacity larger than it, not smaller). |
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1615 minimum_desired_capacity = MIN2(minimum_desired_capacity, max_heap_size); |
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1616 // Should not be less than the heap min size. No need to adjust it |
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1617 // with respect to the heap max size as it's an upper bound (i.e., |
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1618 // we'll try to make the capacity smaller than it, not greater). |
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1619 maximum_desired_capacity = MAX2(maximum_desired_capacity, min_heap_size); |
342 | 1620 |
1717
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1621 if (capacity_after_gc < minimum_desired_capacity) { |
342 | 1622 // Don't expand unless it's significant |
1623 size_t expand_bytes = minimum_desired_capacity - capacity_after_gc; | |
3914
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1624 ergo_verbose4(ErgoHeapSizing, |
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1625 "attempt heap expansion", |
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1626 ergo_format_reason("capacity lower than " |
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1627 "min desired capacity after Full GC") |
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1628 ergo_format_byte("capacity") |
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1629 ergo_format_byte("occupancy") |
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1630 ergo_format_byte_perc("min desired capacity"), |
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1631 capacity_after_gc, used_after_gc, |
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1632 minimum_desired_capacity, (double) MinHeapFreeRatio); |
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1633 expand(expand_bytes); |
342 | 1634 |
1635 // No expansion, now see if we want to shrink | |
1717
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1636 } else if (capacity_after_gc > maximum_desired_capacity) { |
342 | 1637 // Capacity too large, compute shrinking size |
1638 size_t shrink_bytes = capacity_after_gc - maximum_desired_capacity; | |
3914
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1639 ergo_verbose4(ErgoHeapSizing, |
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1640 "attempt heap shrinking", |
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1641 ergo_format_reason("capacity higher than " |
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1642 "max desired capacity after Full GC") |
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1643 ergo_format_byte("capacity") |
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1644 ergo_format_byte("occupancy") |
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1645 ergo_format_byte_perc("max desired capacity"), |
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1646 capacity_after_gc, used_after_gc, |
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1647 maximum_desired_capacity, (double) MaxHeapFreeRatio); |
342 | 1648 shrink(shrink_bytes); |
1649 } | |
1650 } | |
1651 | |
1652 | |
1653 HeapWord* | |
1973 | 1654 G1CollectedHeap::satisfy_failed_allocation(size_t word_size, |
1655 bool* succeeded) { | |
2152 | 1656 assert_at_safepoint(true /* should_be_vm_thread */); |
1973 | 1657 |
1658 *succeeded = true; | |
1659 // Let's attempt the allocation first. | |
2433
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1660 HeapWord* result = |
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1661 attempt_allocation_at_safepoint(word_size, |
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1662 false /* expect_null_mutator_alloc_region */); |
1973 | 1663 if (result != NULL) { |
1664 assert(*succeeded, "sanity"); | |
1665 return result; | |
1666 } | |
342 | 1667 |
1668 // In a G1 heap, we're supposed to keep allocation from failing by | |
1669 // incremental pauses. Therefore, at least for now, we'll favor | |
1670 // expansion over collection. (This might change in the future if we can | |
1671 // do something smarter than full collection to satisfy a failed alloc.) | |
1672 result = expand_and_allocate(word_size); | |
1673 if (result != NULL) { | |
1973 | 1674 assert(*succeeded, "sanity"); |
342 | 1675 return result; |
1676 } | |
1677 | |
1973 | 1678 // Expansion didn't work, we'll try to do a Full GC. |
1679 bool gc_succeeded = do_collection(false, /* explicit_gc */ | |
1680 false, /* clear_all_soft_refs */ | |
1681 word_size); | |
1682 if (!gc_succeeded) { | |
1683 *succeeded = false; | |
1684 return NULL; | |
1685 } | |
1686 | |
1687 // Retry the allocation | |
1688 result = attempt_allocation_at_safepoint(word_size, | |
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1689 true /* expect_null_mutator_alloc_region */); |
342 | 1690 if (result != NULL) { |
1973 | 1691 assert(*succeeded, "sanity"); |
342 | 1692 return result; |
1693 } | |
1694 | |
1973 | 1695 // Then, try a Full GC that will collect all soft references. |
1696 gc_succeeded = do_collection(false, /* explicit_gc */ | |
1697 true, /* clear_all_soft_refs */ | |
1698 word_size); | |
1699 if (!gc_succeeded) { | |
1700 *succeeded = false; | |
1701 return NULL; | |
1702 } | |
1703 | |
1704 // Retry the allocation once more | |
1705 result = attempt_allocation_at_safepoint(word_size, | |
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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 | |
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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"); |
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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 | |
1728 HeapWord* G1CollectedHeap::expand_and_allocate(size_t word_size) { | |
2152 | 1729 assert_at_safepoint(true /* should_be_vm_thread */); |
1730 | |
1731 verify_region_sets_optional(); | |
1973 | 1732 |
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1733 size_t expand_bytes = MAX2(word_size * HeapWordSize, MinHeapDeltaBytes); |
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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); |
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1739 if (expand(expand_bytes)) { |
3766 | 1740 _hrs.verify_optional(); |
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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 false /* expect_null_mutator_alloc_region */); |
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1744 } |
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1745 return NULL; |
342 | 1746 } |
1747 | |
3766 | 1748 void G1CollectedHeap::update_committed_space(HeapWord* old_end, |
1749 HeapWord* new_end) { | |
1750 assert(old_end != new_end, "don't call this otherwise"); | |
1751 assert((HeapWord*) _g1_storage.high() == new_end, "invariant"); | |
1752 | |
1753 // Update the committed mem region. | |
1754 _g1_committed.set_end(new_end); | |
1755 // Tell the card table about the update. | |
1756 Universe::heap()->barrier_set()->resize_covered_region(_g1_committed); | |
1757 // Tell the BOT about the update. | |
1758 _bot_shared->resize(_g1_committed.word_size()); | |
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1759 // Tell the hot card cache about the update |
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1760 _cg1r->hot_card_cache()->resize_card_counts(capacity()); |
3766 | 1761 } |
1762 | |
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1763 bool G1CollectedHeap::expand(size_t expand_bytes) { |
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1764 size_t aligned_expand_bytes = ReservedSpace::page_align_size_up(expand_bytes); |
342 | 1765 aligned_expand_bytes = align_size_up(aligned_expand_bytes, |
1766 HeapRegion::GrainBytes); | |
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1767 ergo_verbose2(ErgoHeapSizing, |
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1768 "expand the heap", |
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1769 ergo_format_byte("requested expansion amount") |
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1770 ergo_format_byte("attempted expansion amount"), |
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1771 expand_bytes, aligned_expand_bytes); |
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1772 |
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1773 if (_g1_storage.uncommitted_size() == 0) { |
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1774 ergo_verbose0(ErgoHeapSizing, |
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1775 "did not expand the heap", |
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1776 ergo_format_reason("heap already fully expanded")); |
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1777 return false; |
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1778 } |
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1779 |
3766 | 1780 // First commit the memory. |
1781 HeapWord* old_end = (HeapWord*) _g1_storage.high(); | |
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1782 bool successful = _g1_storage.expand_by(aligned_expand_bytes); |
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1783 if (successful) { |
3766 | 1784 // Then propagate this update to the necessary data structures. |
1785 HeapWord* new_end = (HeapWord*) _g1_storage.high(); | |
1786 update_committed_space(old_end, new_end); | |
1787 | |
1788 FreeRegionList expansion_list("Local Expansion List"); | |
1789 MemRegion mr = _hrs.expand_by(old_end, new_end, &expansion_list); | |
1790 assert(mr.start() == old_end, "post-condition"); | |
1791 // mr might be a smaller region than what was requested if | |
1792 // expand_by() was unable to allocate the HeapRegion instances | |
1793 assert(mr.end() <= new_end, "post-condition"); | |
1794 | |
1795 size_t actual_expand_bytes = mr.byte_size(); | |
1796 assert(actual_expand_bytes <= aligned_expand_bytes, "post-condition"); | |
1797 assert(actual_expand_bytes == expansion_list.total_capacity_bytes(), | |
1798 "post-condition"); | |
1799 if (actual_expand_bytes < aligned_expand_bytes) { | |
1800 // We could not expand _hrs to the desired size. In this case we | |
1801 // need to shrink the committed space accordingly. | |
1802 assert(mr.end() < new_end, "invariant"); | |
1803 | |
1804 size_t diff_bytes = aligned_expand_bytes - actual_expand_bytes; | |
1805 // First uncommit the memory. | |
1806 _g1_storage.shrink_by(diff_bytes); | |
1807 // Then propagate this update to the necessary data structures. | |
1808 update_committed_space(new_end, mr.end()); | |
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1809 } |
3766 | 1810 _free_list.add_as_tail(&expansion_list); |
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1811 |
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1812 if (_hr_printer.is_active()) { |
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1813 HeapWord* curr = mr.start(); |
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1814 while (curr < mr.end()) { |
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1815 HeapWord* curr_end = curr + HeapRegion::GrainWords; |
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1816 _hr_printer.commit(curr, curr_end); |
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1817 curr = curr_end; |
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1818 } |
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1819 assert(curr == mr.end(), "post-condition"); |
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1820 } |
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1821 g1_policy()->record_new_heap_size(n_regions()); |
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1822 } else { |
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1823 ergo_verbose0(ErgoHeapSizing, |
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1824 "did not expand the heap", |
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1825 ergo_format_reason("heap expansion operation failed")); |
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1826 // The expansion of the virtual storage space was unsuccessful. |
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1827 // Let's see if it was because we ran out of swap. |
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1828 if (G1ExitOnExpansionFailure && |
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1829 _g1_storage.uncommitted_size() >= aligned_expand_bytes) { |
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1830 // We had head room... |
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1831 vm_exit_out_of_memory(aligned_expand_bytes, OOM_MMAP_ERROR, "G1 heap expansion"); |
342 | 1832 } |
1833 } | |
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1834 return successful; |
342 | 1835 } |
1836 | |
3766 | 1837 void G1CollectedHeap::shrink_helper(size_t shrink_bytes) { |
342 | 1838 size_t aligned_shrink_bytes = |
1839 ReservedSpace::page_align_size_down(shrink_bytes); | |
1840 aligned_shrink_bytes = align_size_down(aligned_shrink_bytes, | |
1841 HeapRegion::GrainBytes); | |
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1842 uint num_regions_to_remove = (uint)(shrink_bytes / HeapRegion::GrainBytes); |
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1843 |
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1844 uint num_regions_removed = _hrs.shrink_by(num_regions_to_remove); |
3766 | 1845 HeapWord* old_end = (HeapWord*) _g1_storage.high(); |
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1846 size_t shrunk_bytes = num_regions_removed * HeapRegion::GrainBytes; |
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1847 |
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1848 ergo_verbose3(ErgoHeapSizing, |
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1849 "shrink the heap", |
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1850 ergo_format_byte("requested shrinking amount") |
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1851 ergo_format_byte("aligned shrinking amount") |
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1852 ergo_format_byte("attempted shrinking amount"), |
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1853 shrink_bytes, aligned_shrink_bytes, shrunk_bytes); |
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1854 if (num_regions_removed > 0) { |
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1855 _g1_storage.shrink_by(shrunk_bytes); |
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1856 HeapWord* new_end = (HeapWord*) _g1_storage.high(); |
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1857 |
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1858 if (_hr_printer.is_active()) { |
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1859 HeapWord* curr = old_end; |
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1860 while (curr > new_end) { |
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1861 HeapWord* curr_end = curr; |
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1862 curr -= HeapRegion::GrainWords; |
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1863 _hr_printer.uncommit(curr, curr_end); |
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1864 } |
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1865 } |
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1866 |
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1867 _expansion_regions += num_regions_removed; |
3766 | 1868 update_committed_space(old_end, new_end); |
1869 HeapRegionRemSet::shrink_heap(n_regions()); | |
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1870 g1_policy()->record_new_heap_size(n_regions()); |
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1871 } else { |
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1872 ergo_verbose0(ErgoHeapSizing, |
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1873 "did not shrink the heap", |
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1874 ergo_format_reason("heap shrinking operation failed")); |
342 | 1875 } |
1876 } | |
1877 | |
1878 void G1CollectedHeap::shrink(size_t shrink_bytes) { | |
2152 | 1879 verify_region_sets_optional(); |
1880 | |
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1881 // We should only reach here at the end of a Full GC which means we |
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1882 // should not not be holding to any GC alloc regions. The method |
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1883 // below will make sure of that and do any remaining clean up. |
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1884 abandon_gc_alloc_regions(); |
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1885 |
2152 | 1886 // Instead of tearing down / rebuilding the free lists here, we |
1887 // could instead use the remove_all_pending() method on free_list to | |
1888 // remove only the ones that we need to remove. | |
4072 | 1889 tear_down_region_sets(true /* free_list_only */); |
342 | 1890 shrink_helper(shrink_bytes); |
4072 | 1891 rebuild_region_sets(true /* free_list_only */); |
2152 | 1892 |
3766 | 1893 _hrs.verify_optional(); |
2152 | 1894 verify_region_sets_optional(); |
342 | 1895 } |
1896 | |
1897 // Public methods. | |
1898 | |
1899 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away | |
1900 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list | |
1901 #endif // _MSC_VER | |
1902 | |
1903 | |
1904 G1CollectedHeap::G1CollectedHeap(G1CollectorPolicy* policy_) : | |
1905 SharedHeap(policy_), | |
1906 _g1_policy(policy_), | |
1111 | 1907 _dirty_card_queue_set(false), |
1705 | 1908 _into_cset_dirty_card_queue_set(false), |
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1909 _is_alive_closure_cm(this), |
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1910 _is_alive_closure_stw(this), |
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1911 _ref_processor_cm(NULL), |
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1912 _ref_processor_stw(NULL), |
342 | 1913 _process_strong_tasks(new SubTasksDone(G1H_PS_NumElements)), |
1914 _bot_shared(NULL), | |
10405 | 1915 _evac_failure_scan_stack(NULL), |
342 | 1916 _mark_in_progress(false), |
2152 | 1917 _cg1r(NULL), _summary_bytes_used(0), |
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1918 _g1mm(NULL), |
342 | 1919 _refine_cte_cl(NULL), |
1920 _full_collection(false), | |
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1921 _free_list("Master Free List", new MasterFreeRegionListMtSafeChecker()), |
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1922 _secondary_free_list("Secondary Free List", new SecondaryFreeRegionListMtSafeChecker()), |
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1923 _old_set("Old Set", false /* humongous */, new OldRegionSetMtSafeChecker()), |
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1924 _humongous_set("Master Humongous Set", true /* humongous */, new HumongousRegionSetMtSafeChecker()), |
2152 | 1925 _free_regions_coming(false), |
342 | 1926 _young_list(new YoungList(this)), |
1927 _gc_time_stamp(0), | |
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1928 _retained_old_gc_alloc_region(NULL), |
6595 | 1929 _survivor_plab_stats(YoungPLABSize, PLABWeight), |
1930 _old_plab_stats(OldPLABSize, PLABWeight), | |
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1931 _expand_heap_after_alloc_failure(true), |
526 | 1932 _surviving_young_words(NULL), |
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1933 _old_marking_cycles_started(0), |
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1934 _old_marking_cycles_completed(0), |
10405 | 1935 _concurrent_cycle_started(false), |
526 | 1936 _in_cset_fast_test(NULL), |
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1937 _in_cset_fast_test_base(NULL), |
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1938 _dirty_cards_region_list(NULL), |
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1939 _worker_cset_start_region(NULL), |
10405 | 1940 _worker_cset_start_region_time_stamp(NULL), |
1941 _gc_timer_stw(new (ResourceObj::C_HEAP, mtGC) STWGCTimer()), | |
1942 _gc_timer_cm(new (ResourceObj::C_HEAP, mtGC) ConcurrentGCTimer()), | |
1943 _gc_tracer_stw(new (ResourceObj::C_HEAP, mtGC) G1NewTracer()), | |
1944 _gc_tracer_cm(new (ResourceObj::C_HEAP, mtGC) G1OldTracer()) { | |
1945 | |
1946 _g1h = this; | |
342 | 1947 if (_process_strong_tasks == NULL || !_process_strong_tasks->valid()) { |
1948 vm_exit_during_initialization("Failed necessary allocation."); | |
1949 } | |
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1950 |
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1951 _humongous_object_threshold_in_words = HeapRegion::GrainWords / 2; |
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1952 |
342 | 1953 int n_queues = MAX2((int)ParallelGCThreads, 1); |
1954 _task_queues = new RefToScanQueueSet(n_queues); | |
1955 | |
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1956 uint n_rem_sets = HeapRegionRemSet::num_par_rem_sets(); |
342 | 1957 assert(n_rem_sets > 0, "Invariant."); |
1958 | |
6197 | 1959 _worker_cset_start_region = NEW_C_HEAP_ARRAY(HeapRegion*, n_queues, mtGC); |
1960 _worker_cset_start_region_time_stamp = NEW_C_HEAP_ARRAY(unsigned int, n_queues, mtGC); | |
10405 | 1961 _evacuation_failed_info_array = NEW_C_HEAP_ARRAY(EvacuationFailedInfo, n_queues, mtGC); |
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1962 |
342 | 1963 for (int i = 0; i < n_queues; i++) { |
1964 RefToScanQueue* q = new RefToScanQueue(); | |
1965 q->initialize(); | |
1966 _task_queues->register_queue(i, q); | |
10405 | 1967 ::new (&_evacuation_failed_info_array[i]) EvacuationFailedInfo(); |
1968 } | |
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1969 clear_cset_start_regions(); |
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1970 |
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1971 // Initialize the G1EvacuationFailureALot counters and flags. |
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1972 NOT_PRODUCT(reset_evacuation_should_fail();) |
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1973 |
342 | 1974 guarantee(_task_queues != NULL, "task_queues allocation failure."); |
1975 } | |
1976 | |
1977 jint G1CollectedHeap::initialize() { | |
1166 | 1978 CollectedHeap::pre_initialize(); |
342 | 1979 os::enable_vtime(); |
1980 | |
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1981 G1Log::init(); |
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1982 |
342 | 1983 // Necessary to satisfy locking discipline assertions. |
1984 | |
1985 MutexLocker x(Heap_lock); | |
1986 | |
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1987 // We have to initialize the printer before committing the heap, as |
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1988 // it will be used then. |
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1989 _hr_printer.set_active(G1PrintHeapRegions); |
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1990 |
342 | 1991 // While there are no constraints in the GC code that HeapWordSize |
1992 // be any particular value, there are multiple other areas in the | |
1993 // system which believe this to be true (e.g. oop->object_size in some | |
1994 // cases incorrectly returns the size in wordSize units rather than | |
1995 // HeapWordSize). | |
1996 guarantee(HeapWordSize == wordSize, "HeapWordSize must equal wordSize"); | |
1997 | |
1998 size_t init_byte_size = collector_policy()->initial_heap_byte_size(); | |
1999 size_t max_byte_size = collector_policy()->max_heap_byte_size(); | |
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2000 size_t heap_alignment = collector_policy()->heap_alignment(); |
342 | 2001 |
2002 // Ensure that the sizes are properly aligned. | |
2003 Universe::check_alignment(init_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
2004 Universe::check_alignment(max_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
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2005 Universe::check_alignment(max_byte_size, heap_alignment, "g1 heap"); |
342 | 2006 |
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2007 _cg1r = new ConcurrentG1Refine(this); |
342 | 2008 |
2009 // Reserve the maximum. | |
642
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2010 |
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2011 // When compressed oops are enabled, the preferred heap base |
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2012 // is calculated by subtracting the requested size from the |
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2013 // 32Gb boundary and using the result as the base address for |
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2014 // heap reservation. If the requested size is not aligned to |
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2015 // HeapRegion::GrainBytes (i.e. the alignment that is passed |
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2016 // into the ReservedHeapSpace constructor) then the actual |
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2017 // base of the reserved heap may end up differing from the |
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2018 // address that was requested (i.e. the preferred heap base). |
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2019 // If this happens then we could end up using a non-optimal |
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2020 // compressed oops mode. |
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2021 |
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2022 ReservedSpace heap_rs = Universe::reserve_heap(max_byte_size, |
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2023 heap_alignment); |
342 | 2024 |
2025 // It is important to do this in a way such that concurrent readers can't | |
10405 | 2026 // temporarily think something is in the heap. (I've actually seen this |
342 | 2027 // happen in asserts: DLD.) |
2028 _reserved.set_word_size(0); | |
2029 _reserved.set_start((HeapWord*)heap_rs.base()); | |
2030 _reserved.set_end((HeapWord*)(heap_rs.base() + heap_rs.size())); | |
2031 | |
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2032 _expansion_regions = (uint) (max_byte_size / HeapRegion::GrainBytes); |
342 | 2033 |
2034 // Create the gen rem set (and barrier set) for the entire reserved region. | |
2035 _rem_set = collector_policy()->create_rem_set(_reserved, 2); | |
2036 set_barrier_set(rem_set()->bs()); | |
12343 | 2037 if (!barrier_set()->is_a(BarrierSet::G1SATBCTLogging)) { |
2038 vm_exit_during_initialization("G1 requires a G1SATBLoggingCardTableModRefBS"); | |
342 | 2039 return JNI_ENOMEM; |
2040 } | |
2041 | |
2042 // Also create a G1 rem set. | |
12343 | 2043 _g1_rem_set = new G1RemSet(this, g1_barrier_set()); |
342 | 2044 |
2045 // Carve out the G1 part of the heap. | |
2046 | |
2047 ReservedSpace g1_rs = heap_rs.first_part(max_byte_size); | |
2048 _g1_reserved = MemRegion((HeapWord*)g1_rs.base(), | |
2049 g1_rs.size()/HeapWordSize); | |
2050 | |
2051 _g1_storage.initialize(g1_rs, 0); | |
2052 _g1_committed = MemRegion((HeapWord*)_g1_storage.low(), (size_t) 0); | |
3766 | 2053 _hrs.initialize((HeapWord*) _g1_reserved.start(), |
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2054 (HeapWord*) _g1_reserved.end()); |
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2055 assert(_hrs.max_length() == _expansion_regions, |
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2056 err_msg("max length: %u expansion regions: %u", |
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2057 _hrs.max_length(), _expansion_regions)); |
342 | 2058 |
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2059 // Do later initialization work for concurrent refinement. |
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2060 _cg1r->init(); |
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2061 |
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2062 // 6843694 - ensure that the maximum region index can fit |
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2063 // in the remembered set structures. |
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2064 const uint max_region_idx = (1U << (sizeof(RegionIdx_t)*BitsPerByte-1)) - 1; |
807
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2065 guarantee((max_regions() - 1) <= max_region_idx, "too many regions"); |
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2066 |
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2067 size_t max_cards_per_region = ((size_t)1 << (sizeof(CardIdx_t)*BitsPerByte-1)) - 1; |
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2068 guarantee(HeapRegion::CardsPerRegion > 0, "make sure it's initialized"); |
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2069 guarantee(HeapRegion::CardsPerRegion < max_cards_per_region, |
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2070 "too many cards per region"); |
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2071 |
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2072 FreeRegionList::set_unrealistically_long_length(max_regions() + 1); |
2152 | 2073 |
342 | 2074 _bot_shared = new G1BlockOffsetSharedArray(_reserved, |
2075 heap_word_size(init_byte_size)); | |
2076 | |
2077 _g1h = this; | |
2078 | |
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2079 _in_cset_fast_test_length = max_regions(); |
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2080 _in_cset_fast_test_base = |
6197 | 2081 NEW_C_HEAP_ARRAY(bool, (size_t) _in_cset_fast_test_length, mtGC); |
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2082 |
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2083 // We're biasing _in_cset_fast_test to avoid subtracting the |
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2084 // beginning of the heap every time we want to index; basically |
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2085 // it's the same with what we do with the card table. |
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2086 _in_cset_fast_test = _in_cset_fast_test_base - |
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2087 ((uintx) _g1_reserved.start() >> HeapRegion::LogOfHRGrainBytes); |
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2088 |
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2089 // Clear the _cset_fast_test bitmap in anticipation of adding |
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2090 // regions to the incremental collection set for the first |
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2091 // evacuation pause. |
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|
2092 clear_cset_fast_test(); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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1391
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|
2093 |
342 | 2094 // Create the ConcurrentMark data structure and thread. |
2095 // (Must do this late, so that "max_regions" is defined.) | |
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
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7207
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|
2096 _cm = new ConcurrentMark(this, heap_rs); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
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7207
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|
2097 if (_cm == NULL || !_cm->completed_initialization()) { |
442f942757c0
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|
2098 vm_shutdown_during_initialization("Could not create/initialize ConcurrentMark"); |
442f942757c0
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|
2099 return JNI_ENOMEM; |
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|
2100 } |
342 | 2101 _cmThread = _cm->cmThread(); |
2102 | |
2103 // Initialize the from_card cache structure of HeapRegionRemSet. | |
2104 HeapRegionRemSet::init_heap(max_regions()); | |
2105 | |
677 | 2106 // 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
changeset
|
2107 if (!expand(init_byte_size)) { |
7397
442f942757c0
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|
2108 vm_shutdown_during_initialization("Failed to allocate initial heap."); |
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
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2173
diff
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|
2109 return JNI_ENOMEM; |
c33825b68624
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diff
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|
2110 } |
342 | 2111 |
2112 // Perform any initialization actions delegated to the policy. | |
2113 g1_policy()->init(); | |
2114 | |
2115 _refine_cte_cl = | |
2116 new RefineCardTableEntryClosure(ConcurrentG1RefineThread::sts(), | |
2117 g1_rem_set(), | |
2118 concurrent_g1_refine()); | |
2119 JavaThread::dirty_card_queue_set().set_closure(_refine_cte_cl); | |
2120 | |
2121 JavaThread::satb_mark_queue_set().initialize(SATB_Q_CBL_mon, | |
2122 SATB_Q_FL_lock, | |
1111 | 2123 G1SATBProcessCompletedThreshold, |
342 | 2124 Shared_SATB_Q_lock); |
794 | 2125 |
2126 JavaThread::dirty_card_queue_set().initialize(DirtyCardQ_CBL_mon, | |
2127 DirtyCardQ_FL_lock, | |
1111 | 2128 concurrent_g1_refine()->yellow_zone(), |
2129 concurrent_g1_refine()->red_zone(), | |
794 | 2130 Shared_DirtyCardQ_lock); |
2131 | |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
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parents:
595
diff
changeset
|
2132 if (G1DeferredRSUpdate) { |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
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595
diff
changeset
|
2133 dirty_card_queue_set().initialize(DirtyCardQ_CBL_mon, |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2134 DirtyCardQ_FL_lock, |
1111 | 2135 -1, // never trigger processing |
2136 -1, // no limit on length | |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2137 Shared_DirtyCardQ_lock, |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2138 &JavaThread::dirty_card_queue_set()); |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2139 } |
1705 | 2140 |
2141 // Initialize the card queue set used to hold cards containing | |
2142 // references into the collection set. | |
2143 _into_cset_dirty_card_queue_set.initialize(DirtyCardQ_CBL_mon, | |
2144 DirtyCardQ_FL_lock, | |
2145 -1, // never trigger processing | |
2146 -1, // no limit on length | |
2147 Shared_DirtyCardQ_lock, | |
2148 &JavaThread::dirty_card_queue_set()); | |
2149 | |
342 | 2150 // In case we're keeping closure specialization stats, initialize those |
2151 // counts and that mechanism. | |
2152 SpecializationStats::clear(); | |
2153 | |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2154 // Here we allocate the dummy full region that is required by the |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2155 // G1AllocRegion class. If we don't pass an address in the reserved |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2156 // space here, lots of asserts fire. |
3766 | 2157 |
2158 HeapRegion* dummy_region = new_heap_region(0 /* index of bottom region */, | |
2159 _g1_reserved.start()); | |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2160 // We'll re-use the same region whether the alloc region will |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2161 // require BOT updates or not and, if it doesn't, then a non-young |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2162 // region will complain that it cannot support allocations without |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2163 // BOT updates. So we'll tag the dummy region as young to avoid that. |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
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|
2164 dummy_region->set_young(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2165 // Make sure it's full. |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
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diff
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|
2166 dummy_region->set_top(dummy_region->end()); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
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|
2167 G1AllocRegion::setup(this, dummy_region); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
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|
2168 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2169 init_mutator_alloc_region(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2170 |
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
2171 // Do create of the monitoring and management support so that |
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
2172 // values in the heap have been properly initialized. |
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
2173 _g1mm = new G1MonitoringSupport(this); |
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
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|
2174 |
342 | 2175 return JNI_OK; |
2176 } | |
2177 | |
12233
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2178 size_t G1CollectedHeap::conservative_max_heap_alignment() { |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2179 return HeapRegion::max_region_size(); |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2180 } |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2181 |
342 | 2182 void G1CollectedHeap::ref_processing_init() { |
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
2183 // Reference processing in G1 currently works as follows: |
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
2184 // |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2185 // * There are two reference processor instances. One is |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2186 // used to record and process discovered references |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2187 // during concurrent marking; the other is used to |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2188 // record and process references during STW pauses |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2189 // (both full and incremental). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2190 // * Both ref processors need to 'span' the entire heap as |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2191 // the regions in the collection set may be dotted around. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2192 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2193 // * For the concurrent marking ref processor: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2194 // * Reference discovery is enabled at initial marking. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2195 // * Reference discovery is disabled and the discovered |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2196 // references processed etc during remarking. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2197 // * Reference discovery is MT (see below). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2198 // * Reference discovery requires a barrier (see below). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2199 // * Reference processing may or may not be MT |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2200 // (depending on the value of ParallelRefProcEnabled |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2201 // and ParallelGCThreads). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2202 // * A full GC disables reference discovery by the CM |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2203 // ref processor and abandons any entries on it's |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2204 // discovered lists. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2205 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2206 // * For the STW processor: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2207 // * Non MT discovery is enabled at the start of a full GC. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2208 // * Processing and enqueueing during a full GC is non-MT. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2209 // * During a full GC, references are processed after marking. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2210 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2211 // * Discovery (may or may not be MT) is enabled at the start |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2212 // of an incremental evacuation pause. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2213 // * References are processed near the end of a STW evacuation pause. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2214 // * For both types of GC: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2215 // * Discovery is atomic - i.e. not concurrent. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2216 // * Reference discovery will not need a barrier. |
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
2217 |
342 | 2218 SharedHeap::ref_processing_init(); |
2219 MemRegion mr = reserved_region(); | |
3979
4dfb2df418f2
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johnc
parents:
3973
diff
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|
2220 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2221 // Concurrent Mark ref processor |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2222 _ref_processor_cm = |
2369
92da084fefc9
6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads
ysr
parents:
2361
diff
changeset
|
2223 new ReferenceProcessor(mr, // span |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2224 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2225 // mt processing |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
2226 (int) ParallelGCThreads, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2227 // degree of mt processing |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
2228 (ParallelGCThreads > 1) || (ConcGCThreads > 1), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2229 // mt discovery |
4dfb2df418f2
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parents:
3973
diff
changeset
|
2230 (int) MAX2(ParallelGCThreads, ConcGCThreads), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2231 // degree of mt discovery |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2232 false, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
2233 // Reference discovery is not atomic |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
2234 &_is_alive_closure_cm, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
2235 // is alive closure |
4dfb2df418f2
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parents:
3973
diff
changeset
|
2236 // (for efficiency/performance) |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2237 true); |
4dfb2df418f2
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parents:
3973
diff
changeset
|
2238 // Setting next fields of discovered |
4dfb2df418f2
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parents:
3973
diff
changeset
|
2239 // lists requires a barrier. |
4dfb2df418f2
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parents:
3973
diff
changeset
|
2240 |
4dfb2df418f2
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parents:
3973
diff
changeset
|
2241 // STW ref processor |
4dfb2df418f2
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parents:
3973
diff
changeset
|
2242 _ref_processor_stw = |
4dfb2df418f2
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parents:
3973
diff
changeset
|
2243 new ReferenceProcessor(mr, // span |
4dfb2df418f2
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parents:
3973
diff
changeset
|
2244 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
4dfb2df418f2
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parents:
3973
diff
changeset
|
2245 // mt processing |
4dfb2df418f2
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3973
diff
changeset
|
2246 MAX2((int)ParallelGCThreads, 1), |
4dfb2df418f2
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parents:
3973
diff
changeset
|
2247 // degree of mt processing |
4dfb2df418f2
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parents:
3973
diff
changeset
|
2248 (ParallelGCThreads > 1), |
4dfb2df418f2
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parents:
3973
diff
changeset
|
2249 // mt discovery |
4dfb2df418f2
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3973
diff
changeset
|
2250 MAX2((int)ParallelGCThreads, 1), |
4dfb2df418f2
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parents:
3973
diff
changeset
|
2251 // degree of mt discovery |
4dfb2df418f2
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parents:
3973
diff
changeset
|
2252 true, |
4dfb2df418f2
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parents:
3973
diff
changeset
|
2253 // Reference discovery is atomic |
4dfb2df418f2
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parents:
3973
diff
changeset
|
2254 &_is_alive_closure_stw, |
4dfb2df418f2
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parents:
3973
diff
changeset
|
2255 // is alive closure |
4dfb2df418f2
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3973
diff
changeset
|
2256 // (for efficiency/performance) |
4dfb2df418f2
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3973
diff
changeset
|
2257 false); |
4dfb2df418f2
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3973
diff
changeset
|
2258 // Setting next fields of discovered |
17748
d60ecdb2773e
8031703: Missing post-barrier in ReferenceProcessor
pliden
parents:
17736
diff
changeset
|
2259 // lists does not require a barrier. |
342 | 2260 } |
2261 | |
2262 size_t G1CollectedHeap::capacity() const { | |
2263 return _g1_committed.byte_size(); | |
2264 } | |
2265 | |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2266 void G1CollectedHeap::reset_gc_time_stamps(HeapRegion* hr) { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2267 assert(!hr->continuesHumongous(), "pre-condition"); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
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2268 hr->reset_gc_time_stamp(); |
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2269 if (hr->startsHumongous()) { |
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|
2270 uint first_index = hr->hrs_index() + 1; |
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|
2271 uint last_index = hr->last_hc_index(); |
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2272 for (uint i = first_index; i < last_index; i += 1) { |
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2273 HeapRegion* chr = region_at(i); |
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|
2274 assert(chr->continuesHumongous(), "sanity"); |
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|
2275 chr->reset_gc_time_stamp(); |
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|
2276 } |
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|
2277 } |
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|
2278 } |
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|
2279 |
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|
2280 #ifndef PRODUCT |
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|
2281 class CheckGCTimeStampsHRClosure : public HeapRegionClosure { |
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|
2282 private: |
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|
2283 unsigned _gc_time_stamp; |
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|
2284 bool _failures; |
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|
2285 |
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|
2286 public: |
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|
2287 CheckGCTimeStampsHRClosure(unsigned gc_time_stamp) : |
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7114678: G1: various small fixes, code cleanup, and refactoring
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2288 _gc_time_stamp(gc_time_stamp), _failures(false) { } |
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|
2289 |
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|
2290 virtual bool doHeapRegion(HeapRegion* hr) { |
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|
2291 unsigned region_gc_time_stamp = hr->get_gc_time_stamp(); |
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2292 if (_gc_time_stamp != region_gc_time_stamp) { |
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|
2293 gclog_or_tty->print_cr("Region "HR_FORMAT" has GC time stamp = %d, " |
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|
2294 "expected %d", HR_FORMAT_PARAMS(hr), |
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|
2295 region_gc_time_stamp, _gc_time_stamp); |
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|
2296 _failures = true; |
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|
2297 } |
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|
2298 return false; |
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|
2299 } |
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|
2300 |
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|
2301 bool failures() { return _failures; } |
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|
2302 }; |
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|
2303 |
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
2304 void G1CollectedHeap::check_gc_time_stamps() { |
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7114678: G1: various small fixes, code cleanup, and refactoring
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2305 CheckGCTimeStampsHRClosure cl(_gc_time_stamp); |
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2306 heap_region_iterate(&cl); |
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2307 guarantee(!cl.failures(), "all GC time stamps should have been reset"); |
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|
2308 } |
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|
2309 #endif // PRODUCT |
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|
2310 |
1705 | 2311 void G1CollectedHeap::iterate_dirty_card_closure(CardTableEntryClosure* cl, |
2312 DirtyCardQueue* into_cset_dcq, | |
2313 bool concurrent, | |
342 | 2314 int worker_i) { |
889 | 2315 // Clean cards in the hot card cache |
10246
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7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
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10242
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|
2316 G1HotCardCache* hot_card_cache = _cg1r->hot_card_cache(); |
194f52aa2f23
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|
2317 hot_card_cache->drain(worker_i, g1_rem_set(), into_cset_dcq); |
889 | 2318 |
342 | 2319 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); |
2320 int n_completed_buffers = 0; | |
1705 | 2321 while (dcqs.apply_closure_to_completed_buffer(cl, worker_i, 0, true)) { |
342 | 2322 n_completed_buffers++; |
2323 } | |
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
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|
2324 g1_policy()->phase_times()->record_update_rs_processed_buffers(worker_i, n_completed_buffers); |
342 | 2325 dcqs.clear_n_completed_buffers(); |
2326 assert(!dcqs.completed_buffers_exist_dirty(), "Completed buffers exist!"); | |
2327 } | |
2328 | |
2329 | |
2330 // Computes the sum of the storage used by the various regions. | |
2331 | |
2332 size_t G1CollectedHeap::used() const { | |
862
36b5611220a7
6863216: Clean up debugging debris inadvertently pushed with 6700789
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|
2333 assert(Heap_lock->owner() != NULL, |
36b5611220a7
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diff
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|
2334 "Should be owned on this thread's behalf."); |
342 | 2335 size_t result = _summary_bytes_used; |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
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|
2336 // Read only once in case it is set to NULL concurrently |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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|
2337 HeapRegion* hr = _mutator_alloc_region.get(); |
845
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6700789: G1: Enable use of compressed oops with G1 heaps
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|
2338 if (hr != NULL) |
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|
2339 result += hr->used(); |
342 | 2340 return result; |
2341 } | |
2342 | |
846
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
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|
2343 size_t G1CollectedHeap::used_unlocked() const { |
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
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|
2344 size_t result = _summary_bytes_used; |
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
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|
2345 return result; |
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
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|
2346 } |
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6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
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|
2347 |
342 | 2348 class SumUsedClosure: public HeapRegionClosure { |
2349 size_t _used; | |
2350 public: | |
2351 SumUsedClosure() : _used(0) {} | |
2352 bool doHeapRegion(HeapRegion* r) { | |
2353 if (!r->continuesHumongous()) { | |
2354 _used += r->used(); | |
2355 } | |
2356 return false; | |
2357 } | |
2358 size_t result() { return _used; } | |
2359 }; | |
2360 | |
2361 size_t G1CollectedHeap::recalculate_used() const { | |
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
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17756
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|
2362 double recalculate_used_start = os::elapsedTime(); |
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
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|
2363 |
342 | 2364 SumUsedClosure blk; |
3766 | 2365 heap_region_iterate(&blk); |
17757
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8035654: Add times for evacuation failure handling in "Other" time
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|
2366 |
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
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diff
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|
2367 g1_policy()->phase_times()->record_evac_fail_recalc_used_time((os::elapsedTime() - recalculate_used_start) * 1000.0); |
342 | 2368 return blk.result(); |
2369 } | |
2370 | |
2371 size_t G1CollectedHeap::unsafe_max_alloc() { | |
2152 | 2372 if (free_regions() > 0) return HeapRegion::GrainBytes; |
342 | 2373 // otherwise, is there space in the current allocation region? |
2374 | |
2375 // We need to store the current allocation region in a local variable | |
2376 // here. The problem is that this method doesn't take any locks and | |
2377 // there may be other threads which overwrite the current allocation | |
2378 // region field. attempt_allocation(), for example, sets it to NULL | |
2379 // and this can happen *after* the NULL check here but before the call | |
2380 // to free(), resulting in a SIGSEGV. Note that this doesn't appear | |
2381 // to be a problem in the optimized build, since the two loads of the | |
2382 // current allocation region field are optimized away. | |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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diff
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|
2383 HeapRegion* hr = _mutator_alloc_region.get(); |
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7023069: G1: Introduce symmetric locking in the slow allocation path
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diff
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|
2384 if (hr == NULL) { |
342 | 2385 return 0; |
2386 } | |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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diff
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|
2387 return hr->free(); |
342 | 2388 } |
2389 | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
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1611
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|
2390 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
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4875
diff
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|
2391 switch (cause) { |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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4875
diff
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|
2392 case GCCause::_gc_locker: return GCLockerInvokesConcurrent; |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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4875
diff
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|
2393 case GCCause::_java_lang_system_gc: return ExplicitGCInvokesConcurrent; |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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4875
diff
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|
2394 case GCCause::_g1_humongous_allocation: return true; |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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4875
diff
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|
2395 default: return false; |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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4875
diff
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|
2396 } |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
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1611
diff
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|
2397 } |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
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diff
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|
2398 |
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
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2433
diff
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|
2399 #ifndef PRODUCT |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
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2433
diff
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|
2400 void G1CollectedHeap::allocate_dummy_regions() { |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2401 // Let's fill up most of the region |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
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2433
diff
changeset
|
2402 size_t word_size = HeapRegion::GrainWords - 1024; |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
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|
2403 // And as a result the region we'll allocate will be humongous. |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2404 guarantee(isHumongous(word_size), "sanity"); |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
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2433
diff
changeset
|
2405 |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2406 for (uintx i = 0; i < G1DummyRegionsPerGC; ++i) { |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
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2433
diff
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|
2407 // Let's use the existing mechanism for the allocation |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
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|
2408 HeapWord* dummy_obj = humongous_obj_allocate(word_size); |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2409 if (dummy_obj != NULL) { |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2410 MemRegion mr(dummy_obj, word_size); |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2411 CollectedHeap::fill_with_object(mr); |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
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2433
diff
changeset
|
2412 } else { |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2413 // If we can't allocate once, we probably cannot allocate |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2414 // again. Let's get out of the loop. |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2415 break; |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2416 } |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
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2433
diff
changeset
|
2417 } |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
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2433
diff
changeset
|
2418 } |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2419 #endif // !PRODUCT |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
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|
2420 |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
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6109
diff
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|
2421 void G1CollectedHeap::increment_old_marking_cycles_started() { |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
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6109
diff
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|
2422 assert(_old_marking_cycles_started == _old_marking_cycles_completed || |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
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6109
diff
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|
2423 _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
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|
2424 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
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|
2425 _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
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|
2426 |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2427 _old_marking_cycles_started++; |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2428 } |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2429 |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2430 void G1CollectedHeap::increment_old_marking_cycles_completed(bool concurrent) { |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
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1611
diff
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|
2431 MonitorLockerEx x(FullGCCount_lock, Mutex::_no_safepoint_check_flag); |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
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1611
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|
2432 |
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2433 // 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
|
2434 // 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
|
2435 // 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
|
2436 // assert here. |
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2437 |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2438 // 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
|
2439 // 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
|
2440 // interrupt a concurrent cycle), the number of full collections |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2441 // 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
|
2442 // 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
|
2443 // behind the number of full collections started. |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2444 |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2445 // 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
|
2446 assert(concurrent || |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2447 (_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
|
2448 (_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
|
2449 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
|
2450 "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
|
2451 _old_marking_cycles_started, _old_marking_cycles_completed)); |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2452 |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2453 // 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
|
2454 assert(!concurrent || |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2455 (_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
|
2456 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
|
2457 "_old_marking_cycles_started = %u " |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2458 "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
|
2459 _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
|
2460 |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2461 _old_marking_cycles_completed += 1; |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2462 |
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2463 // 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
|
2464 // we wake up any waiters (especially when ExplicitInvokesConcurrent |
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2465 // is set) so that if a waiter requests another System.gc() it doesn't |
10405 | 2466 // 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
|
2467 if (concurrent) { |
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2468 _cmThread->clear_in_progress(); |
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2469 } |
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2470 |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2471 // 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
|
2472 // System.gc() with (with ExplicitGCInvokesConcurrent set or not) |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2473 // 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
|
2474 // waiting in VM_G1IncCollectionPause::doit_epilogue(). |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2475 FullGCCount_lock->notify_all(); |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2476 } |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2477 |
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
2478 void G1CollectedHeap::register_concurrent_cycle_start(const Ticks& start_time) { |
10405 | 2479 _concurrent_cycle_started = true; |
2480 _gc_timer_cm->register_gc_start(start_time); | |
2481 | |
2482 _gc_tracer_cm->report_gc_start(gc_cause(), _gc_timer_cm->gc_start()); | |
2483 trace_heap_before_gc(_gc_tracer_cm); | |
2484 } | |
2485 | |
2486 void G1CollectedHeap::register_concurrent_cycle_end() { | |
2487 if (_concurrent_cycle_started) { | |
2488 if (_cm->has_aborted()) { | |
2489 _gc_tracer_cm->report_concurrent_mode_failure(); | |
2490 } | |
12179
f175e3678be2
8020692: TestGCEventMixed.java failed because of timestamp in event after end event
ehelin
parents:
12116
diff
changeset
|
2491 |
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
2492 _gc_timer_cm->register_gc_end(); |
10405 | 2493 _gc_tracer_cm->report_gc_end(_gc_timer_cm->gc_end(), _gc_timer_cm->time_partitions()); |
2494 | |
2495 _concurrent_cycle_started = false; | |
2496 } | |
2497 } | |
2498 | |
2499 void G1CollectedHeap::trace_heap_after_concurrent_cycle() { | |
2500 if (_concurrent_cycle_started) { | |
2501 trace_heap_after_gc(_gc_tracer_cm); | |
2502 } | |
2503 } | |
2504 | |
2505 G1YCType G1CollectedHeap::yc_type() { | |
2506 bool is_young = g1_policy()->gcs_are_young(); | |
2507 bool is_initial_mark = g1_policy()->during_initial_mark_pause(); | |
2508 bool is_during_mark = mark_in_progress(); | |
2509 | |
2510 if (is_initial_mark) { | |
2511 return InitialMark; | |
2512 } else if (is_during_mark) { | |
2513 return DuringMark; | |
2514 } else if (is_young) { | |
2515 return Normal; | |
2516 } else { | |
2517 return Mixed; | |
2518 } | |
2519 } | |
2520 | |
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2521 void G1CollectedHeap::collect(GCCause::Cause cause) { |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2522 assert_heap_not_locked(); |
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2523 |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2524 unsigned int gc_count_before; |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2525 unsigned int old_marking_count_before; |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2526 bool retry_gc; |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2527 |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2528 do { |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2529 retry_gc = false; |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2530 |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2531 { |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2532 MutexLocker ml(Heap_lock); |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2533 |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2534 // Read the GC count while holding the Heap_lock |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2535 gc_count_before = total_collections(); |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2536 old_marking_count_before = _old_marking_cycles_started; |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2537 } |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2538 |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2539 if (should_do_concurrent_full_gc(cause)) { |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2540 // Schedule an initial-mark evacuation pause that will start a |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2541 // concurrent cycle. We're setting word_size to 0 which means that |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2542 // we are not requesting a post-GC allocation. |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2543 VM_G1IncCollectionPause op(gc_count_before, |
1973 | 2544 0, /* word_size */ |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2545 true, /* should_initiate_conc_mark */ |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2546 g1_policy()->max_pause_time_ms(), |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2547 cause); |
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2548 |
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2549 VMThread::execute(&op); |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2550 if (!op.pause_succeeded()) { |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2551 if (old_marking_count_before == _old_marking_cycles_started) { |
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2552 retry_gc = op.should_retry_gc(); |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2553 } else { |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2554 // A Full GC happened while we were trying to schedule the |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2555 // initial-mark GC. No point in starting a new cycle given |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2556 // that the whole heap was collected anyway. |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2557 } |
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2558 |
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2559 if (retry_gc) { |
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2560 if (GC_locker::is_active_and_needs_gc()) { |
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2561 GC_locker::stall_until_clear(); |
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2562 } |
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2563 } |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2564 } |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2565 } else { |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2566 if (cause == GCCause::_gc_locker |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2567 DEBUG_ONLY(|| cause == GCCause::_scavenge_alot)) { |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2568 |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2569 // Schedule a standard evacuation pause. We're setting word_size |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2570 // to 0 which means that we are not requesting a post-GC allocation. |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2571 VM_G1IncCollectionPause op(gc_count_before, |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2572 0, /* word_size */ |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2573 false, /* should_initiate_conc_mark */ |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2574 g1_policy()->max_pause_time_ms(), |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2575 cause); |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2576 VMThread::execute(&op); |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2577 } else { |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2578 // Schedule a Full GC. |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2579 VM_G1CollectFull op(gc_count_before, old_marking_count_before, cause); |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2580 VMThread::execute(&op); |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2581 } |
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2582 } |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2583 } while (retry_gc); |
342 | 2584 } |
2585 | |
2586 bool G1CollectedHeap::is_in(const void* p) const { | |
4708 | 2587 if (_g1_committed.contains(p)) { |
2588 // Given that we know that p is in the committed space, | |
2589 // heap_region_containing_raw() should successfully | |
2590 // return the containing region. | |
2591 HeapRegion* hr = heap_region_containing_raw(p); | |
342 | 2592 return hr->is_in(p); |
2593 } else { | |
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2594 return false; |
342 | 2595 } |
2596 } | |
2597 | |
2598 // Iteration functions. | |
2599 | |
2600 // Iterates an OopClosure over all ref-containing fields of objects | |
2601 // within a HeapRegion. | |
2602 | |
2603 class IterateOopClosureRegionClosure: public HeapRegionClosure { | |
2604 MemRegion _mr; | |
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2605 ExtendedOopClosure* _cl; |
342 | 2606 public: |
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2607 IterateOopClosureRegionClosure(MemRegion mr, ExtendedOopClosure* cl) |
342 | 2608 : _mr(mr), _cl(cl) {} |
2609 bool doHeapRegion(HeapRegion* r) { | |
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2610 if (!r->continuesHumongous()) { |
342 | 2611 r->oop_iterate(_cl); |
2612 } | |
2613 return false; | |
2614 } | |
2615 }; | |
2616 | |
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2617 void G1CollectedHeap::oop_iterate(ExtendedOopClosure* cl) { |
342 | 2618 IterateOopClosureRegionClosure blk(_g1_committed, cl); |
3766 | 2619 heap_region_iterate(&blk); |
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2620 } |
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2621 |
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2622 void G1CollectedHeap::oop_iterate(MemRegion mr, ExtendedOopClosure* cl) { |
342 | 2623 IterateOopClosureRegionClosure blk(mr, cl); |
3766 | 2624 heap_region_iterate(&blk); |
342 | 2625 } |
2626 | |
2627 // Iterates an ObjectClosure over all objects within a HeapRegion. | |
2628 | |
2629 class IterateObjectClosureRegionClosure: public HeapRegionClosure { | |
2630 ObjectClosure* _cl; | |
2631 public: | |
2632 IterateObjectClosureRegionClosure(ObjectClosure* cl) : _cl(cl) {} | |
2633 bool doHeapRegion(HeapRegion* r) { | |
2634 if (! r->continuesHumongous()) { | |
2635 r->object_iterate(_cl); | |
2636 } | |
2637 return false; | |
2638 } | |
2639 }; | |
2640 | |
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2641 void G1CollectedHeap::object_iterate(ObjectClosure* cl) { |
342 | 2642 IterateObjectClosureRegionClosure blk(cl); |
3766 | 2643 heap_region_iterate(&blk); |
342 | 2644 } |
2645 | |
2646 // Calls a SpaceClosure on a HeapRegion. | |
2647 | |
2648 class SpaceClosureRegionClosure: public HeapRegionClosure { | |
2649 SpaceClosure* _cl; | |
2650 public: | |
2651 SpaceClosureRegionClosure(SpaceClosure* cl) : _cl(cl) {} | |
2652 bool doHeapRegion(HeapRegion* r) { | |
2653 _cl->do_space(r); | |
2654 return false; | |
2655 } | |
2656 }; | |
2657 | |
2658 void G1CollectedHeap::space_iterate(SpaceClosure* cl) { | |
2659 SpaceClosureRegionClosure blk(cl); | |
3766 | 2660 heap_region_iterate(&blk); |
342 | 2661 } |
2662 | |
3766 | 2663 void G1CollectedHeap::heap_region_iterate(HeapRegionClosure* cl) const { |
2664 _hrs.iterate(cl); | |
342 | 2665 } |
2666 | |
2667 void | |
2668 G1CollectedHeap::heap_region_par_iterate_chunked(HeapRegionClosure* cl, | |
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2669 uint worker_id, |
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2670 uint no_of_par_workers, |
342 | 2671 jint claim_value) { |
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2672 const uint regions = n_regions(); |
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2673 const uint max_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
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2674 no_of_par_workers : |
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2675 1); |
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2676 assert(UseDynamicNumberOfGCThreads || |
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2677 no_of_par_workers == workers()->total_workers(), |
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2678 "Non dynamic should use fixed number of workers"); |
355 | 2679 // try to spread out the starting points of the workers |
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2680 const HeapRegion* start_hr = |
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2681 start_region_for_worker(worker_id, no_of_par_workers); |
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2682 const uint start_index = start_hr->hrs_index(); |
355 | 2683 |
2684 // each worker will actually look at all regions | |
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2685 for (uint count = 0; count < regions; ++count) { |
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2686 const uint index = (start_index + count) % regions; |
355 | 2687 assert(0 <= index && index < regions, "sanity"); |
2688 HeapRegion* r = region_at(index); | |
2689 // we'll ignore "continues humongous" regions (we'll process them | |
2690 // when we come across their corresponding "start humongous" | |
2691 // region) and regions already claimed | |
2692 if (r->claim_value() == claim_value || r->continuesHumongous()) { | |
2693 continue; | |
2694 } | |
2695 // OK, try to claim it | |
342 | 2696 if (r->claimHeapRegion(claim_value)) { |
355 | 2697 // success! |
2698 assert(!r->continuesHumongous(), "sanity"); | |
2699 if (r->startsHumongous()) { | |
2700 // If the region is "starts humongous" we'll iterate over its | |
2701 // "continues humongous" first; in fact we'll do them | |
2702 // first. The order is important. In on case, calling the | |
2703 // closure on the "starts humongous" region might de-allocate | |
2704 // and clear all its "continues humongous" regions and, as a | |
2705 // result, we might end up processing them twice. So, we'll do | |
2706 // them first (notice: most closures will ignore them anyway) and | |
2707 // then we'll do the "starts humongous" region. | |
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2708 for (uint ch_index = index + 1; ch_index < regions; ++ch_index) { |
355 | 2709 HeapRegion* chr = region_at(ch_index); |
2710 | |
2711 // if the region has already been claimed or it's not | |
2712 // "continues humongous" we're done | |
2713 if (chr->claim_value() == claim_value || | |
2714 !chr->continuesHumongous()) { | |
2715 break; | |
2716 } | |
2717 | |
10405 | 2718 // No one should have claimed it directly. We can given |
355 | 2719 // that we claimed its "starts humongous" region. |
2720 assert(chr->claim_value() != claim_value, "sanity"); | |
2721 assert(chr->humongous_start_region() == r, "sanity"); | |
2722 | |
2723 if (chr->claimHeapRegion(claim_value)) { | |
10405 | 2724 // we should always be able to claim it; no one else should |
355 | 2725 // be trying to claim this region |
2726 | |
2727 bool res2 = cl->doHeapRegion(chr); | |
2728 assert(!res2, "Should not abort"); | |
2729 | |
2730 // Right now, this holds (i.e., no closure that actually | |
2731 // does something with "continues humongous" regions | |
2732 // clears them). We might have to weaken it in the future, | |
2733 // but let's leave these two asserts here for extra safety. | |
2734 assert(chr->continuesHumongous(), "should still be the case"); | |
2735 assert(chr->humongous_start_region() == r, "sanity"); | |
2736 } else { | |
2737 guarantee(false, "we should not reach here"); | |
2738 } | |
2739 } | |
2740 } | |
2741 | |
2742 assert(!r->continuesHumongous(), "sanity"); | |
2743 bool res = cl->doHeapRegion(r); | |
2744 assert(!res, "Should not abort"); | |
2745 } | |
2746 } | |
2747 } | |
2748 | |
390 | 2749 class ResetClaimValuesClosure: public HeapRegionClosure { |
2750 public: | |
2751 bool doHeapRegion(HeapRegion* r) { | |
2752 r->set_claim_value(HeapRegion::InitialClaimValue); | |
2753 return false; | |
2754 } | |
2755 }; | |
2756 | |
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2757 void G1CollectedHeap::reset_heap_region_claim_values() { |
390 | 2758 ResetClaimValuesClosure blk; |
2759 heap_region_iterate(&blk); | |
2760 } | |
2761 | |
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2762 void G1CollectedHeap::reset_cset_heap_region_claim_values() { |
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2763 ResetClaimValuesClosure blk; |
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2764 collection_set_iterate(&blk); |
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2765 } |
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2766 |
355 | 2767 #ifdef ASSERT |
2768 // This checks whether all regions in the heap have the correct claim | |
2769 // value. I also piggy-backed on this a check to ensure that the | |
2770 // humongous_start_region() information on "continues humongous" | |
2771 // regions is correct. | |
2772 | |
2773 class CheckClaimValuesClosure : public HeapRegionClosure { | |
2774 private: | |
2775 jint _claim_value; | |
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2776 uint _failures; |
355 | 2777 HeapRegion* _sh_region; |
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2778 |
355 | 2779 public: |
2780 CheckClaimValuesClosure(jint claim_value) : | |
2781 _claim_value(claim_value), _failures(0), _sh_region(NULL) { } | |
2782 bool doHeapRegion(HeapRegion* r) { | |
2783 if (r->claim_value() != _claim_value) { | |
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2784 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
355 | 2785 "claim value = %d, should be %d", |
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2786 HR_FORMAT_PARAMS(r), |
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2787 r->claim_value(), _claim_value); |
355 | 2788 ++_failures; |
2789 } | |
2790 if (!r->isHumongous()) { | |
2791 _sh_region = NULL; | |
2792 } else if (r->startsHumongous()) { | |
2793 _sh_region = r; | |
2794 } else if (r->continuesHumongous()) { | |
2795 if (r->humongous_start_region() != _sh_region) { | |
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2796 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
355 | 2797 "HS = "PTR_FORMAT", should be "PTR_FORMAT, |
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2798 HR_FORMAT_PARAMS(r), |
355 | 2799 r->humongous_start_region(), |
2800 _sh_region); | |
2801 ++_failures; | |
342 | 2802 } |
2803 } | |
355 | 2804 return false; |
2805 } | |
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2806 uint failures() { return _failures; } |
355 | 2807 }; |
2808 | |
2809 bool G1CollectedHeap::check_heap_region_claim_values(jint claim_value) { | |
2810 CheckClaimValuesClosure cl(claim_value); | |
2811 heap_region_iterate(&cl); | |
2812 return cl.failures() == 0; | |
2813 } | |
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2814 |
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2815 class CheckClaimValuesInCSetHRClosure: public HeapRegionClosure { |
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2816 private: |
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2817 jint _claim_value; |
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2818 uint _failures; |
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2819 |
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2820 public: |
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2821 CheckClaimValuesInCSetHRClosure(jint claim_value) : |
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2822 _claim_value(claim_value), _failures(0) { } |
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2823 |
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2824 uint failures() { return _failures; } |
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2825 |
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2826 bool doHeapRegion(HeapRegion* hr) { |
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2827 assert(hr->in_collection_set(), "how?"); |
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2828 assert(!hr->isHumongous(), "H-region in CSet"); |
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2829 if (hr->claim_value() != _claim_value) { |
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2830 gclog_or_tty->print_cr("CSet Region " HR_FORMAT ", " |
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2831 "claim value = %d, should be %d", |
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2832 HR_FORMAT_PARAMS(hr), |
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2833 hr->claim_value(), _claim_value); |
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2834 _failures += 1; |
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2835 } |
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2836 return false; |
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2837 } |
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2838 }; |
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2839 |
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2840 bool G1CollectedHeap::check_cset_heap_region_claim_values(jint claim_value) { |
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2841 CheckClaimValuesInCSetHRClosure cl(claim_value); |
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2842 collection_set_iterate(&cl); |
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2843 return cl.failures() == 0; |
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2844 } |
355 | 2845 #endif // ASSERT |
342 | 2846 |
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2847 // Clear the cached CSet starting regions and (more importantly) |
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2848 // the time stamps. Called when we reset the GC time stamp. |
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2849 void G1CollectedHeap::clear_cset_start_regions() { |
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2850 assert(_worker_cset_start_region != NULL, "sanity"); |
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2851 assert(_worker_cset_start_region_time_stamp != NULL, "sanity"); |
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2852 |
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2853 int n_queues = MAX2((int)ParallelGCThreads, 1); |
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2854 for (int i = 0; i < n_queues; i++) { |
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2855 _worker_cset_start_region[i] = NULL; |
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changeset
|
2856 _worker_cset_start_region_time_stamp[i] = 0; |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2857 } |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2858 } |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2859 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2860 // Given the id of a worker, obtain or calculate a suitable |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2861 // starting region for iterating over the current collection set. |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2862 HeapRegion* G1CollectedHeap::start_cset_region_for_worker(int worker_i) { |
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2863 assert(get_gc_time_stamp() > 0, "should have been updated by now"); |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2864 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2865 HeapRegion* result = NULL; |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2866 unsigned gc_time_stamp = get_gc_time_stamp(); |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2867 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2868 if (_worker_cset_start_region_time_stamp[worker_i] == gc_time_stamp) { |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2869 // Cached starting region for current worker was set |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2870 // during the current pause - so it's valid. |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2871 // Note: the cached starting heap region may be NULL |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2872 // (when the collection set is empty). |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2873 result = _worker_cset_start_region[worker_i]; |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2874 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
|
2875 return result; |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2876 } |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2877 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2878 // The cached entry was not valid so let's calculate |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2879 // a suitable starting heap region for this worker. |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2880 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2881 // We want the parallel threads to start their collection |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2882 // set iteration at different collection set regions to |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2883 // avoid contention. |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2884 // If we have: |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2885 // n collection set regions |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2886 // p threads |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2887 // Then thread t will start at region floor ((t * n) / p) |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2888 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2889 result = g1_policy()->collection_set(); |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2890 if (G1CollectedHeap::use_parallel_gc_threads()) { |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2891 uint cs_size = g1_policy()->cset_region_length(); |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
2892 uint active_workers = workers()->active_workers(); |
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2893 assert(UseDynamicNumberOfGCThreads || |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2894 active_workers == workers()->total_workers(), |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2895 "Unless dynamic should use total workers"); |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2896 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2897 uint end_ind = (cs_size * worker_i) / active_workers; |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2898 uint start_ind = 0; |
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2899 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2900 if (worker_i > 0 && |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2901 _worker_cset_start_region_time_stamp[worker_i - 1] == gc_time_stamp) { |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2902 // Previous workers starting region is valid |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2903 // so let's iterate from there |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2904 start_ind = (cs_size * (worker_i - 1)) / active_workers; |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2905 result = _worker_cset_start_region[worker_i - 1]; |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2906 } |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2907 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2908 for (uint i = start_ind; i < end_ind; i++) { |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2909 result = result->next_in_collection_set(); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2910 } |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2911 } |
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2912 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2913 // 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
|
2914 // (when the collection set is empty). |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2915 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
|
2916 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
|
2917 "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
|
2918 _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
|
2919 OrderAccess::storestore(); |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2920 _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
|
2921 return result; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2922 } |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2923 |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2924 HeapRegion* G1CollectedHeap::start_region_for_worker(uint worker_i, |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2925 uint no_of_par_workers) { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2926 uint worker_num = |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2927 G1CollectedHeap::use_parallel_gc_threads() ? no_of_par_workers : 1U; |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2928 assert(UseDynamicNumberOfGCThreads || |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2929 no_of_par_workers == workers()->total_workers(), |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2930 "Non dynamic should use fixed number of workers"); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2931 const uint start_index = n_regions() * worker_i / worker_num; |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2932 return region_at(start_index); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2933 } |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2934 |
342 | 2935 void G1CollectedHeap::collection_set_iterate(HeapRegionClosure* cl) { |
2936 HeapRegion* r = g1_policy()->collection_set(); | |
2937 while (r != NULL) { | |
2938 HeapRegion* next = r->next_in_collection_set(); | |
2939 if (cl->doHeapRegion(r)) { | |
2940 cl->incomplete(); | |
2941 return; | |
2942 } | |
2943 r = next; | |
2944 } | |
2945 } | |
2946 | |
2947 void G1CollectedHeap::collection_set_iterate_from(HeapRegion* r, | |
2948 HeapRegionClosure *cl) { | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2949 if (r == NULL) { |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2950 // 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
|
2951 return; |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2952 } |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2953 |
342 | 2954 assert(r->in_collection_set(), |
2955 "Start region must be a member of the collection set."); | |
2956 HeapRegion* cur = r; | |
2957 while (cur != NULL) { | |
2958 HeapRegion* next = cur->next_in_collection_set(); | |
2959 if (cl->doHeapRegion(cur) && false) { | |
2960 cl->incomplete(); | |
2961 return; | |
2962 } | |
2963 cur = next; | |
2964 } | |
2965 cur = g1_policy()->collection_set(); | |
2966 while (cur != r) { | |
2967 HeapRegion* next = cur->next_in_collection_set(); | |
2968 if (cl->doHeapRegion(cur) && false) { | |
2969 cl->incomplete(); | |
2970 return; | |
2971 } | |
2972 cur = next; | |
2973 } | |
2974 } | |
2975 | |
2976 CompactibleSpace* G1CollectedHeap::first_compactible_space() { | |
3766 | 2977 return n_regions() > 0 ? region_at(0) : NULL; |
342 | 2978 } |
2979 | |
2980 | |
2981 Space* G1CollectedHeap::space_containing(const void* addr) const { | |
2982 Space* res = heap_region_containing(addr); | |
2983 return res; | |
2984 } | |
2985 | |
2986 HeapWord* G1CollectedHeap::block_start(const void* addr) const { | |
2987 Space* sp = space_containing(addr); | |
2988 if (sp != NULL) { | |
2989 return sp->block_start(addr); | |
2990 } | |
2991 return NULL; | |
2992 } | |
2993 | |
2994 size_t G1CollectedHeap::block_size(const HeapWord* addr) const { | |
2995 Space* sp = space_containing(addr); | |
2996 assert(sp != NULL, "block_size of address outside of heap"); | |
2997 return sp->block_size(addr); | |
2998 } | |
2999 | |
3000 bool G1CollectedHeap::block_is_obj(const HeapWord* addr) const { | |
3001 Space* sp = space_containing(addr); | |
3002 return sp->block_is_obj(addr); | |
3003 } | |
3004 | |
3005 bool G1CollectedHeap::supports_tlab_allocation() const { | |
3006 return true; | |
3007 } | |
3008 | |
3009 size_t G1CollectedHeap::tlab_capacity(Thread* ignored) const { | |
17727 | 3010 return (_g1_policy->young_list_target_length() - young_list()->survivor_length()) * HeapRegion::GrainBytes; |
3011 } | |
3012 | |
3013 size_t G1CollectedHeap::tlab_used(Thread* ignored) const { | |
3014 return young_list()->eden_used_bytes(); | |
3015 } | |
3016 | |
3017 // For G1 TLABs should not contain humongous objects, so the maximum TLAB size | |
3018 // must be smaller than the humongous object limit. | |
3019 size_t G1CollectedHeap::max_tlab_size() const { | |
3020 return align_size_down(_humongous_object_threshold_in_words - 1, MinObjAlignment); | |
342 | 3021 } |
3022 | |
3023 size_t G1CollectedHeap::unsafe_max_tlab_alloc(Thread* ignored) const { | |
3024 // Return the remaining space in the cur alloc region, but not less than | |
3025 // the min TLAB size. | |
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
3026 |
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
3027 // Also, this value can be at most the humongous object threshold, |
10405 | 3028 // 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
|
3029 // humongous objects. |
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
3030 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3031 HeapRegion* hr = _mutator_alloc_region.get(); |
17727 | 3032 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
|
3033 if (hr == NULL) { |
17727 | 3034 return max_tlab; |
342 | 3035 } else { |
17727 | 3036 return MIN2(MAX2(hr->free(), (size_t) MinTLABSize), max_tlab); |
342 | 3037 } |
3038 } | |
3039 | |
3040 size_t G1CollectedHeap::max_capacity() const { | |
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
3041 return _g1_reserved.byte_size(); |
342 | 3042 } |
3043 | |
3044 jlong G1CollectedHeap::millis_since_last_gc() { | |
3045 // assert(false, "NYI"); | |
3046 return 0; | |
3047 } | |
3048 | |
3049 void G1CollectedHeap::prepare_for_verify() { | |
3050 if (SafepointSynchronize::is_at_safepoint() || ! UseTLAB) { | |
3051 ensure_parsability(false); | |
3052 } | |
3053 g1_rem_set()->prepare_for_verify(); | |
3054 } | |
3055 | |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3056 bool G1CollectedHeap::allocated_since_marking(oop obj, HeapRegion* hr, |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3057 VerifyOption vo) { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3058 switch (vo) { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3059 case VerifyOption_G1UsePrevMarking: |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3060 return hr->obj_allocated_since_prev_marking(obj); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3061 case VerifyOption_G1UseNextMarking: |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3062 return hr->obj_allocated_since_next_marking(obj); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
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|
3063 case VerifyOption_G1UseMarkWord: |
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3064 return false; |
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3065 default: |
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3066 ShouldNotReachHere(); |
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3067 } |
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3068 return false; // keep some compilers happy |
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3069 } |
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3070 |
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3071 HeapWord* G1CollectedHeap::top_at_mark_start(HeapRegion* hr, VerifyOption vo) { |
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3072 switch (vo) { |
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3073 case VerifyOption_G1UsePrevMarking: return hr->prev_top_at_mark_start(); |
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3074 case VerifyOption_G1UseNextMarking: return hr->next_top_at_mark_start(); |
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3075 case VerifyOption_G1UseMarkWord: return NULL; |
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3076 default: ShouldNotReachHere(); |
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3077 } |
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3078 return NULL; // keep some compilers happy |
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3079 } |
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3080 |
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3081 bool G1CollectedHeap::is_marked(oop obj, VerifyOption vo) { |
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3082 switch (vo) { |
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3083 case VerifyOption_G1UsePrevMarking: return isMarkedPrev(obj); |
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3084 case VerifyOption_G1UseNextMarking: return isMarkedNext(obj); |
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3085 case VerifyOption_G1UseMarkWord: return obj->is_gc_marked(); |
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3086 default: ShouldNotReachHere(); |
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3087 } |
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3088 return false; // keep some compilers happy |
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3089 } |
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3090 |
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3091 const char* G1CollectedHeap::top_at_mark_start_str(VerifyOption vo) { |
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3092 switch (vo) { |
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3093 case VerifyOption_G1UsePrevMarking: return "PTAMS"; |
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3094 case VerifyOption_G1UseNextMarking: return "NTAMS"; |
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3095 case VerifyOption_G1UseMarkWord: return "NONE"; |
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3096 default: ShouldNotReachHere(); |
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3097 } |
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3098 return NULL; // keep some compilers happy |
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3099 } |
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3100 |
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3101 class VerifyRootsClosure: public OopClosure { |
12080 | 3102 private: |
3103 G1CollectedHeap* _g1h; | |
3104 VerifyOption _vo; | |
3105 bool _failures; | |
3106 public: | |
3107 // _vo == UsePrevMarking -> use "prev" marking information, | |
3108 // _vo == UseNextMarking -> use "next" marking information, | |
3109 // _vo == UseMarkWord -> use mark word from object header. | |
3110 VerifyRootsClosure(VerifyOption vo) : | |
3111 _g1h(G1CollectedHeap::heap()), | |
3112 _vo(vo), | |
3113 _failures(false) { } | |
3114 | |
3115 bool failures() { return _failures; } | |
3116 | |
3117 template <class T> void do_oop_nv(T* p) { | |
3118 T heap_oop = oopDesc::load_heap_oop(p); | |
3119 if (!oopDesc::is_null(heap_oop)) { | |
3120 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
3121 if (_g1h->is_obj_dead_cond(obj, _vo)) { | |
3122 gclog_or_tty->print_cr("Root location "PTR_FORMAT" " | |
3123 "points to dead obj "PTR_FORMAT, p, (void*) obj); | |
3124 if (_vo == VerifyOption_G1UseMarkWord) { | |
3125 gclog_or_tty->print_cr(" Mark word: "PTR_FORMAT, (void*)(obj->mark())); | |
3126 } | |
3127 obj->print_on(gclog_or_tty); | |
3128 _failures = true; | |
3129 } | |
3130 } | |
3131 } | |
3132 | |
3133 void do_oop(oop* p) { do_oop_nv(p); } | |
3134 void do_oop(narrowOop* p) { do_oop_nv(p); } | |
3135 }; | |
3136 | |
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3137 class G1VerifyCodeRootOopClosure: public OopClosure { |
12080 | 3138 G1CollectedHeap* _g1h; |
3139 OopClosure* _root_cl; | |
3140 nmethod* _nm; | |
3141 VerifyOption _vo; | |
3142 bool _failures; | |
3143 | |
3144 template <class T> void do_oop_work(T* p) { | |
3145 // First verify that this root is live | |
3146 _root_cl->do_oop(p); | |
3147 | |
3148 if (!G1VerifyHeapRegionCodeRoots) { | |
3149 // We're not verifying the code roots attached to heap region. | |
3150 return; | |
3151 } | |
3152 | |
3153 // Don't check the code roots during marking verification in a full GC | |
3154 if (_vo == VerifyOption_G1UseMarkWord) { | |
3155 return; | |
3156 } | |
3157 | |
3158 // Now verify that the current nmethod (which contains p) is | |
3159 // in the code root list of the heap region containing the | |
3160 // object referenced by p. | |
3161 | |
3162 T heap_oop = oopDesc::load_heap_oop(p); | |
3163 if (!oopDesc::is_null(heap_oop)) { | |
3164 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
3165 | |
3166 // Now fetch the region containing the object | |
3167 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
3168 HeapRegionRemSet* hrrs = hr->rem_set(); | |
3169 // Verify that the strong code root list for this region | |
3170 // contains the nmethod | |
3171 if (!hrrs->strong_code_roots_list_contains(_nm)) { | |
3172 gclog_or_tty->print_cr("Code root location "PTR_FORMAT" " | |
3173 "from nmethod "PTR_FORMAT" not in strong " | |
3174 "code roots for region ["PTR_FORMAT","PTR_FORMAT")", | |
3175 p, _nm, hr->bottom(), hr->end()); | |
3176 _failures = true; | |
3177 } | |
3178 } | |
3179 } | |
3180 | |
3181 public: | |
3182 G1VerifyCodeRootOopClosure(G1CollectedHeap* g1h, OopClosure* root_cl, VerifyOption vo): | |
3183 _g1h(g1h), _root_cl(root_cl), _vo(vo), _nm(NULL), _failures(false) {} | |
3184 | |
3185 void do_oop(oop* p) { do_oop_work(p); } | |
3186 void do_oop(narrowOop* p) { do_oop_work(p); } | |
3187 | |
3188 void set_nmethod(nmethod* nm) { _nm = nm; } | |
3189 bool failures() { return _failures; } | |
3190 }; | |
3191 | |
3192 class G1VerifyCodeRootBlobClosure: public CodeBlobClosure { | |
3193 G1VerifyCodeRootOopClosure* _oop_cl; | |
3194 | |
3195 public: | |
3196 G1VerifyCodeRootBlobClosure(G1VerifyCodeRootOopClosure* oop_cl): | |
3197 _oop_cl(oop_cl) {} | |
3198 | |
3199 void do_code_blob(CodeBlob* cb) { | |
3200 nmethod* nm = cb->as_nmethod_or_null(); | |
3201 if (nm != NULL) { | |
3202 _oop_cl->set_nmethod(nm); | |
3203 nm->oops_do(_oop_cl); | |
3204 } | |
3205 } | |
3206 }; | |
3207 | |
3208 class YoungRefCounterClosure : public OopClosure { | |
3209 G1CollectedHeap* _g1h; | |
3210 int _count; | |
3211 public: | |
3212 YoungRefCounterClosure(G1CollectedHeap* g1h) : _g1h(g1h), _count(0) {} | |
3213 void do_oop(oop* p) { if (_g1h->is_in_young(*p)) { _count++; } } | |
3214 void do_oop(narrowOop* p) { ShouldNotReachHere(); } | |
3215 | |
3216 int count() { return _count; } | |
3217 void reset_count() { _count = 0; }; | |
3218 }; | |
3219 | |
3220 class VerifyKlassClosure: public KlassClosure { | |
3221 YoungRefCounterClosure _young_ref_counter_closure; | |
3222 OopClosure *_oop_closure; | |
3223 public: | |
3224 VerifyKlassClosure(G1CollectedHeap* g1h, OopClosure* cl) : _young_ref_counter_closure(g1h), _oop_closure(cl) {} | |
3225 void do_klass(Klass* k) { | |
3226 k->oops_do(_oop_closure); | |
3227 | |
3228 _young_ref_counter_closure.reset_count(); | |
3229 k->oops_do(&_young_ref_counter_closure); | |
3230 if (_young_ref_counter_closure.count() > 0) { | |
3231 guarantee(k->has_modified_oops(), err_msg("Klass %p, has young refs but is not dirty.", k)); | |
3232 } | |
3233 } | |
3234 }; | |
3235 | |
342 | 3236 class VerifyLivenessOopClosure: public OopClosure { |
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3237 G1CollectedHeap* _g1h; |
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3238 VerifyOption _vo; |
342 | 3239 public: |
3772
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3240 VerifyLivenessOopClosure(G1CollectedHeap* g1h, VerifyOption vo): |
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3241 _g1h(g1h), _vo(vo) |
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3242 { } |
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3243 void do_oop(narrowOop *p) { do_oop_work(p); } |
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3244 void do_oop( oop *p) { do_oop_work(p); } |
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3245 |
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3246 template <class T> void do_oop_work(T *p) { |
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3247 oop obj = oopDesc::load_decode_heap_oop(p); |
3772
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|
3248 guarantee(obj == NULL || !_g1h->is_obj_dead_cond(obj, _vo), |
845
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|
3249 "Dead object referenced by a not dead object"); |
342 | 3250 } |
3251 }; | |
3252 | |
3253 class VerifyObjsInRegionClosure: public ObjectClosure { | |
811 | 3254 private: |
342 | 3255 G1CollectedHeap* _g1h; |
3256 size_t _live_bytes; | |
3257 HeapRegion *_hr; | |
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|
3258 VerifyOption _vo; |
342 | 3259 public: |
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|
3260 // _vo == UsePrevMarking -> use "prev" marking information, |
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3261 // _vo == UseNextMarking -> use "next" marking information, |
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3262 // _vo == UseMarkWord -> use mark word from object header. |
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|
3263 VerifyObjsInRegionClosure(HeapRegion *hr, VerifyOption vo) |
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3264 : _live_bytes(0), _hr(hr), _vo(vo) { |
342 | 3265 _g1h = G1CollectedHeap::heap(); |
3266 } | |
3267 void do_object(oop o) { | |
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|
3268 VerifyLivenessOopClosure isLive(_g1h, _vo); |
342 | 3269 assert(o != NULL, "Huh?"); |
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3270 if (!_g1h->is_obj_dead_cond(o, _vo)) { |
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3271 // If the object is alive according to the mark word, |
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|
3272 // then verify that the marking information agrees. |
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|
3273 // Note we can't verify the contra-positive of the |
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|
3274 // above: if the object is dead (according to the mark |
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|
3275 // word), it may not be marked, or may have been marked |
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3276 // but has since became dead, or may have been allocated |
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|
3277 // since the last marking. |
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|
3278 if (_vo == VerifyOption_G1UseMarkWord) { |
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|
3279 guarantee(!_g1h->is_obj_dead(o), "mark word and concurrent mark mismatch"); |
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|
3280 } |
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|
3281 |
6725
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|
3282 o->oop_iterate_no_header(&isLive); |
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|
3283 if (!_hr->obj_allocated_since_prev_marking(o)) { |
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|
3284 size_t obj_size = o->size(); // Make sure we don't overflow |
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|
3285 _live_bytes += (obj_size * HeapWordSize); |
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|
3286 } |
342 | 3287 } |
3288 } | |
3289 size_t live_bytes() { return _live_bytes; } | |
3290 }; | |
3291 | |
3292 class PrintObjsInRegionClosure : public ObjectClosure { | |
3293 HeapRegion *_hr; | |
3294 G1CollectedHeap *_g1; | |
3295 public: | |
3296 PrintObjsInRegionClosure(HeapRegion *hr) : _hr(hr) { | |
3297 _g1 = G1CollectedHeap::heap(); | |
3298 }; | |
3299 | |
3300 void do_object(oop o) { | |
3301 if (o != NULL) { | |
3302 HeapWord *start = (HeapWord *) o; | |
3303 size_t word_sz = o->size(); | |
3304 gclog_or_tty->print("\nPrinting obj "PTR_FORMAT" of size " SIZE_FORMAT | |
3305 " isMarkedPrev %d isMarkedNext %d isAllocSince %d\n", | |
3306 (void*) o, word_sz, | |
3307 _g1->isMarkedPrev(o), | |
3308 _g1->isMarkedNext(o), | |
3309 _hr->obj_allocated_since_prev_marking(o)); | |
3310 HeapWord *end = start + word_sz; | |
3311 HeapWord *cur; | |
3312 int *val; | |
3313 for (cur = start; cur < end; cur++) { | |
3314 val = (int *) cur; | |
3315 gclog_or_tty->print("\t "PTR_FORMAT":"PTR_FORMAT"\n", val, *val); | |
3316 } | |
3317 } | |
3318 } | |
3319 }; | |
3320 | |
3321 class VerifyRegionClosure: public HeapRegionClosure { | |
811 | 3322 private: |
6254
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|
3323 bool _par; |
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|
3324 VerifyOption _vo; |
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3325 bool _failures; |
811 | 3326 public: |
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|
3327 // _vo == UsePrevMarking -> use "prev" marking information, |
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3328 // _vo == UseNextMarking -> use "next" marking information, |
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|
3329 // _vo == UseMarkWord -> use mark word from object header. |
6008 | 3330 VerifyRegionClosure(bool par, VerifyOption vo) |
3331 : _par(par), | |
3772
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|
3332 _vo(vo), |
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|
3333 _failures(false) {} |
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|
3334 |
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|
3335 bool failures() { |
ff2402f6a50b
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|
3336 return _failures; |
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|
3337 } |
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|
3338 |
342 | 3339 bool doHeapRegion(HeapRegion* r) { |
637
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6817419: G1: Enable extensive verification for humongous regions
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|
3340 if (!r->continuesHumongous()) { |
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|
3341 bool failures = false; |
6008 | 3342 r->verify(_vo, &failures); |
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|
3343 if (failures) { |
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|
3344 _failures = true; |
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diff
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|
3345 } else { |
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|
3346 VerifyObjsInRegionClosure not_dead_yet_cl(r, _vo); |
1020
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|
3347 r->object_iterate(¬_dead_yet_cl); |
4787
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6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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|
3348 if (_vo != VerifyOption_G1UseNextMarking) { |
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6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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|
3349 if (r->max_live_bytes() < not_dead_yet_cl.live_bytes()) { |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
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diff
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|
3350 gclog_or_tty->print_cr("["PTR_FORMAT","PTR_FORMAT"] " |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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|
3351 "max_live_bytes "SIZE_FORMAT" " |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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diff
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|
3352 "< calculated "SIZE_FORMAT, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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diff
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|
3353 r->bottom(), r->end(), |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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|
3354 r->max_live_bytes(), |
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|
3355 not_dead_yet_cl.live_bytes()); |
4787
2ace1c4ee8da
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diff
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|
3356 _failures = true; |
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diff
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|
3357 } |
2ace1c4ee8da
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diff
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|
3358 } else { |
2ace1c4ee8da
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|
3359 // When vo == UseNextMarking we cannot currently do a sanity |
2ace1c4ee8da
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|
3360 // check on the live bytes as the calculation has not been |
2ace1c4ee8da
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diff
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|
3361 // finalized yet. |
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|
3362 } |
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|
3363 } |
342 | 3364 } |
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|
3365 return false; // stop the region iteration if we hit a failure |
342 | 3366 } |
3367 }; | |
3368 | |
12080 | 3369 // This is the task used for parallel verification of the heap regions |
390 | 3370 |
3371 class G1ParVerifyTask: public AbstractGangTask { | |
3372 private: | |
3373 G1CollectedHeap* _g1h; | |
3772
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|
3374 VerifyOption _vo; |
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|
3375 bool _failures; |
390 | 3376 |
3377 public: | |
3772
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|
3378 // _vo == UsePrevMarking -> use "prev" marking information, |
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|
3379 // _vo == UseNextMarking -> use "next" marking information, |
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|
3380 // _vo == UseMarkWord -> use mark word from object header. |
6008 | 3381 G1ParVerifyTask(G1CollectedHeap* g1h, VerifyOption vo) : |
390 | 3382 AbstractGangTask("Parallel verify task"), |
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|
3383 _g1h(g1h), |
3772
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|
3384 _vo(vo), |
1020
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|
3385 _failures(false) { } |
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|
3386 |
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|
3387 bool failures() { |
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|
3388 return _failures; |
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|
3389 } |
390 | 3390 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
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|
3391 void work(uint worker_id) { |
637
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|
3392 HandleMark hm; |
6008 | 3393 VerifyRegionClosure blk(true, _vo); |
4728
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|
3394 _g1h->heap_region_par_iterate_chunked(&blk, worker_id, |
4095
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|
3395 _g1h->workers()->active_workers(), |
390 | 3396 HeapRegion::ParVerifyClaimValue); |
1020
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|
3397 if (blk.failures()) { |
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|
3398 _failures = true; |
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|
3399 } |
390 | 3400 } |
3401 }; | |
3402 | |
12080 | 3403 void G1CollectedHeap::verify(bool silent, VerifyOption vo) { |
8855
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8010463: G1: Crashes with -UseTLAB and heap verification
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diff
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|
3404 if (SafepointSynchronize::is_at_safepoint()) { |
12080 | 3405 assert(Thread::current()->is_VM_thread(), |
3406 "Expected to be executed serially by the VM thread at this point"); | |
3407 | |
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|
3408 if (!silent) { gclog_or_tty->print("Roots "); } |
3772
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|
3409 VerifyRootsClosure rootsCl(vo); |
12080 | 3410 G1VerifyCodeRootOopClosure codeRootsCl(this, &rootsCl, vo); |
3411 G1VerifyCodeRootBlobClosure blobsCl(&codeRootsCl); | |
6725
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|
3412 VerifyKlassClosure klassCl(this, &rootsCl); |
3772
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|
3413 |
3293
1f4413413144
7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
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diff
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|
3414 // We apply the relevant closures to all the oops in the |
1f4413413144
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diff
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|
3415 // system dictionary, the string table and the code cache. |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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diff
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|
3416 const int so = SO_AllClasses | SO_Strings | SO_CodeCache; |
3772
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|
3417 |
6725
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|
3418 // Need cleared claim bits for the strong roots processing |
da91efe96a93
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|
3419 ClassLoaderDataGraph::clear_claimed_marks(); |
da91efe96a93
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|
3420 |
3293
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diff
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|
3421 process_strong_roots(true, // activate StrongRootsScope |
6725
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6964458: Reimplement class meta-data storage to use native memory
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diff
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|
3422 false, // we set "is scavenging" to false, |
da91efe96a93
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|
3423 // so we don't reset the dirty cards. |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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diff
changeset
|
3424 ScanningOption(so), // roots scanning options |
342 | 3425 &rootsCl, |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
3426 &blobsCl, |
6725
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6629
diff
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|
3427 &klassCl |
da91efe96a93
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diff
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|
3428 ); |
da91efe96a93
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|
3429 |
12080 | 3430 bool failures = rootsCl.failures() || codeRootsCl.failures(); |
3772
6747fd0512e0
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|
3431 |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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diff
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|
3432 if (vo != VerifyOption_G1UseMarkWord) { |
6747fd0512e0
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diff
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|
3433 // If we're verifying during a full GC then the region sets |
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7004681: G1: Extend marking verification to Full GCs
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diff
changeset
|
3434 // will have been torn down at the start of the GC. Therefore |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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diff
changeset
|
3435 // verifying the region sets will fail. So we only verify |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3436 // the region sets when not in a full GC. |
6747fd0512e0
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3766
diff
changeset
|
3437 if (!silent) { gclog_or_tty->print("HeapRegionSets "); } |
6747fd0512e0
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johnc
parents:
3766
diff
changeset
|
3438 verify_region_sets(); |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3766
diff
changeset
|
3439 } |
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3766
diff
changeset
|
3440 |
2152 | 3441 if (!silent) { gclog_or_tty->print("HeapRegions "); } |
390 | 3442 if (GCParallelVerificationEnabled && ParallelGCThreads > 1) { |
3443 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
3444 "sanity check"); | |
3445 | |
6008 | 3446 G1ParVerifyTask task(this, vo); |
4095
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diff
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|
3447 assert(UseDynamicNumberOfGCThreads || |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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4090
diff
changeset
|
3448 workers()->active_workers() == workers()->total_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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diff
changeset
|
3449 "If not dynamic should be using all the workers"); |
bca17e38de00
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diff
changeset
|
3450 int n_workers = workers()->active_workers(); |
390 | 3451 set_par_threads(n_workers); |
3452 workers()->run_task(&task); | |
3453 set_par_threads(0); | |
1020
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|
3454 if (task.failures()) { |
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diff
changeset
|
3455 failures = true; |
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diff
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|
3456 } |
390 | 3457 |
4095
bca17e38de00
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diff
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|
3458 // Checks that the expected amount of parallel work was done. |
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4090
diff
changeset
|
3459 // The implication is that n_workers is > 0. |
390 | 3460 assert(check_heap_region_claim_values(HeapRegion::ParVerifyClaimValue), |
3461 "sanity check"); | |
3462 | |
3463 reset_heap_region_claim_values(); | |
3464 | |
3465 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
3466 "sanity check"); | |
3467 } else { | |
6008 | 3468 VerifyRegionClosure blk(false, vo); |
3766 | 3469 heap_region_iterate(&blk); |
1020
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|
3470 if (blk.failures()) { |
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diff
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|
3471 failures = true; |
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diff
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|
3472 } |
390 | 3473 } |
2152 | 3474 if (!silent) gclog_or_tty->print("RemSet "); |
342 | 3475 rem_set()->verify(); |
1020
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|
3476 |
ff2402f6a50b
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1019
diff
changeset
|
3477 if (failures) { |
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diff
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|
3478 gclog_or_tty->print_cr("Heap:"); |
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
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4072
diff
changeset
|
3479 // It helps to have the per-region information in the output to |
53074c2c4600
7099849: G1: include heap region information in hs_err files
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4072
diff
changeset
|
3480 // help us track down what went wrong. This is why we call |
53074c2c4600
7099849: G1: include heap region information in hs_err files
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4072
diff
changeset
|
3481 // print_extended_on() instead of print_on(). |
53074c2c4600
7099849: G1: include heap region information in hs_err files
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4072
diff
changeset
|
3482 print_extended_on(gclog_or_tty); |
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|
3483 gclog_or_tty->print_cr(""); |
1547
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jcoomes
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1545
diff
changeset
|
3484 #ifndef PRODUCT |
1044 | 3485 if (VerifyDuringGC && G1VerifyDuringGCPrintReachable) { |
1388 | 3486 concurrent_mark()->print_reachable("at-verification-failure", |
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|
3487 vo, false /* all */); |
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diff
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|
3488 } |
1547
fb1a39993f69
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1545
diff
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|
3489 #endif |
1020
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diff
changeset
|
3490 gclog_or_tty->flush(); |
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diff
changeset
|
3491 } |
ff2402f6a50b
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diff
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|
3492 guarantee(!failures, "there should not have been any failures"); |
342 | 3493 } else { |
8855
24ef5fb05e0f
8010463: G1: Crashes with -UseTLAB and heap verification
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8853
diff
changeset
|
3494 if (!silent) |
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8853
diff
changeset
|
3495 gclog_or_tty->print("(SKIPPING roots, heapRegionSets, heapRegions, remset) "); |
342 | 3496 } |
3497 } | |
3498 | |
12080 | 3499 void G1CollectedHeap::verify(bool silent) { |
3500 verify(silent, VerifyOption_G1UsePrevMarking); | |
3501 } | |
3502 | |
3503 double G1CollectedHeap::verify(bool guard, const char* msg) { | |
3504 double verify_time_ms = 0.0; | |
3505 | |
3506 if (guard && total_collections() >= VerifyGCStartAt) { | |
3507 double verify_start = os::elapsedTime(); | |
3508 HandleMark hm; // Discard invalid handles created during verification | |
3509 prepare_for_verify(); | |
3510 Universe::verify(VerifyOption_G1UsePrevMarking, msg); | |
3511 verify_time_ms = (os::elapsedTime() - verify_start) * 1000; | |
3512 } | |
3513 | |
3514 return verify_time_ms; | |
3515 } | |
3516 | |
3517 void G1CollectedHeap::verify_before_gc() { | |
3518 double verify_time_ms = verify(VerifyBeforeGC, " VerifyBeforeGC:"); | |
3519 g1_policy()->phase_times()->record_verify_before_time_ms(verify_time_ms); | |
3520 } | |
3521 | |
3522 void G1CollectedHeap::verify_after_gc() { | |
3523 double verify_time_ms = verify(VerifyAfterGC, " VerifyAfterGC:"); | |
3524 g1_policy()->phase_times()->record_verify_after_time_ms(verify_time_ms); | |
3525 } | |
3526 | |
342 | 3527 class PrintRegionClosure: public HeapRegionClosure { |
3528 outputStream* _st; | |
3529 public: | |
3530 PrintRegionClosure(outputStream* st) : _st(st) {} | |
3531 bool doHeapRegion(HeapRegion* r) { | |
3532 r->print_on(_st); | |
3533 return false; | |
3534 } | |
3535 }; | |
3536 | |
3537 void G1CollectedHeap::print_on(outputStream* st) const { | |
838
0316eac49d5a
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|
3538 st->print(" %-20s", "garbage-first heap"); |
0316eac49d5a
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|
3539 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")
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diff
changeset
|
3540 capacity()/K, used_unlocked()/K); |
838
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6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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|
3541 st->print(" [" INTPTR_FORMAT ", " INTPTR_FORMAT ", " INTPTR_FORMAT ")", |
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|
3542 _g1_storage.low_boundary(), |
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6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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|
3543 _g1_storage.high(), |
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|
3544 _g1_storage.high_boundary()); |
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|
3545 st->cr(); |
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3983
diff
changeset
|
3546 st->print(" region size " SIZE_FORMAT "K, ", HeapRegion::GrainBytes / K); |
6010
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|
3547 uint young_regions = _young_list->length(); |
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|
3548 st->print("%u young (" SIZE_FORMAT "K), ", young_regions, |
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|
3549 (size_t) young_regions * HeapRegion::GrainBytes / K); |
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3550 uint survivor_regions = g1_policy()->recorded_survivor_regions(); |
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|
3551 st->print("%u survivors (" SIZE_FORMAT "K)", survivor_regions, |
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|
3552 (size_t) survivor_regions * HeapRegion::GrainBytes / K); |
838
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|
3553 st->cr(); |
6863
04155d9c8c76
8000358: G1: metaspace information not printed in PrintHeapAtGC output nor in hs_err file
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|
3554 MetaspaceAux::print_on(st); |
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
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diff
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|
3555 } |
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|
3556 |
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7099849: G1: include heap region information in hs_err files
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|
3557 void G1CollectedHeap::print_extended_on(outputStream* st) const { |
53074c2c4600
7099849: G1: include heap region information in hs_err files
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|
3558 print_on(st); |
53074c2c4600
7099849: G1: include heap region information in hs_err files
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|
3559 |
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|
3560 // Print the per-region information. |
53074c2c4600
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|
3561 st->cr(); |
6010
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|
3562 st->print_cr("Heap Regions: (Y=young(eden), SU=young(survivor), " |
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|
3563 "HS=humongous(starts), HC=humongous(continues), " |
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|
3564 "CS=collection set, F=free, TS=gc time stamp, " |
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|
3565 "PTAMS=previous top-at-mark-start, " |
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|
3566 "NTAMS=next top-at-mark-start)"); |
342 | 3567 PrintRegionClosure blk(st); |
3766 | 3568 heap_region_iterate(&blk); |
342 | 3569 } |
3570 | |
9076
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8011872: Include Bit Map addresses in the hs_err files
stefank
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8855
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|
3571 void G1CollectedHeap::print_on_error(outputStream* st) const { |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
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changeset
|
3572 this->CollectedHeap::print_on_error(st); |
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changeset
|
3573 |
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8011872: Include Bit Map addresses in the hs_err files
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diff
changeset
|
3574 if (_cm != NULL) { |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
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diff
changeset
|
3575 st->cr(); |
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|
3576 _cm->print_on_error(st); |
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changeset
|
3577 } |
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|
3578 } |
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|
3579 |
342 | 3580 void G1CollectedHeap::print_gc_threads_on(outputStream* st) const { |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
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|
3581 if (G1CollectedHeap::use_parallel_gc_threads()) { |
1019 | 3582 workers()->print_worker_threads_on(st); |
3583 } | |
3584 _cmThread->print_on(st); | |
342 | 3585 st->cr(); |
1019 | 3586 _cm->print_worker_threads_on(st); |
3587 _cg1r->print_worker_threads_on(st); | |
342 | 3588 } |
3589 | |
3590 void G1CollectedHeap::gc_threads_do(ThreadClosure* tc) const { | |
1833
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|
3591 if (G1CollectedHeap::use_parallel_gc_threads()) { |
342 | 3592 workers()->threads_do(tc); |
3593 } | |
3594 tc->do_thread(_cmThread); | |
794 | 3595 _cg1r->threads_do(tc); |
342 | 3596 } |
3597 | |
3598 void G1CollectedHeap::print_tracing_info() const { | |
3599 // We'll overload this to mean "trace GC pause statistics." | |
3600 if (TraceGen0Time || TraceGen1Time) { | |
3601 // The "G1CollectorPolicy" is keeping track of these stats, so delegate | |
3602 // to that. | |
3603 g1_policy()->print_tracing_info(); | |
3604 } | |
751 | 3605 if (G1SummarizeRSetStats) { |
342 | 3606 g1_rem_set()->print_summary_info(); |
3607 } | |
1282 | 3608 if (G1SummarizeConcMark) { |
342 | 3609 concurrent_mark()->print_summary_info(); |
3610 } | |
3611 g1_policy()->print_yg_surv_rate_info(); | |
3612 SpecializationStats::print(); | |
3613 } | |
3614 | |
3777
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7046182: G1: remove unnecessary iterations over the collection set
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|
3615 #ifndef PRODUCT |
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|
3616 // Helpful for debugging RSet issues. |
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|
3617 |
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|
3618 class PrintRSetsClosure : public HeapRegionClosure { |
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|
3619 private: |
e8b0b0392037
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|
3620 const char* _msg; |
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|
3621 size_t _occupied_sum; |
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|
3622 |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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diff
changeset
|
3623 public: |
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|
3624 bool doHeapRegion(HeapRegion* r) { |
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7046182: G1: remove unnecessary iterations over the collection set
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parents:
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diff
changeset
|
3625 HeapRegionRemSet* hrrs = r->rem_set(); |
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parents:
3774
diff
changeset
|
3626 size_t occupied = hrrs->occupied(); |
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parents:
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diff
changeset
|
3627 _occupied_sum += occupied; |
e8b0b0392037
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tonyp
parents:
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diff
changeset
|
3628 |
e8b0b0392037
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parents:
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diff
changeset
|
3629 gclog_or_tty->print_cr("Printing RSet for region "HR_FORMAT, |
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parents:
3774
diff
changeset
|
3630 HR_FORMAT_PARAMS(r)); |
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parents:
3774
diff
changeset
|
3631 if (occupied == 0) { |
e8b0b0392037
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tonyp
parents:
3774
diff
changeset
|
3632 gclog_or_tty->print_cr(" RSet is empty"); |
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7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3633 } else { |
e8b0b0392037
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parents:
3774
diff
changeset
|
3634 hrrs->print(); |
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tonyp
parents:
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diff
changeset
|
3635 } |
e8b0b0392037
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tonyp
parents:
3774
diff
changeset
|
3636 gclog_or_tty->print_cr("----------"); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3637 return false; |
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7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3638 } |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3639 |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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3774
diff
changeset
|
3640 PrintRSetsClosure(const char* msg) : _msg(msg), _occupied_sum(0) { |
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7046182: G1: remove unnecessary iterations over the collection set
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parents:
3774
diff
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|
3641 gclog_or_tty->cr(); |
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|
3642 gclog_or_tty->print_cr("========================================"); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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diff
changeset
|
3643 gclog_or_tty->print_cr(msg); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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parents:
3774
diff
changeset
|
3644 gclog_or_tty->cr(); |
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tonyp
parents:
3774
diff
changeset
|
3645 } |
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tonyp
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diff
changeset
|
3646 |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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diff
changeset
|
3647 ~PrintRSetsClosure() { |
e8b0b0392037
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3774
diff
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|
3648 gclog_or_tty->print_cr("Occupied Sum: "SIZE_FORMAT, _occupied_sum); |
e8b0b0392037
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diff
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|
3649 gclog_or_tty->print_cr("========================================"); |
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7046182: G1: remove unnecessary iterations over the collection set
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3774
diff
changeset
|
3650 gclog_or_tty->cr(); |
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diff
changeset
|
3651 } |
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diff
changeset
|
3652 }; |
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diff
changeset
|
3653 |
e8b0b0392037
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diff
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|
3654 void G1CollectedHeap::print_cset_rsets() { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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3774
diff
changeset
|
3655 PrintRSetsClosure cl("Printing CSet RSets"); |
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7046182: G1: remove unnecessary iterations over the collection set
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parents:
3774
diff
changeset
|
3656 collection_set_iterate(&cl); |
e8b0b0392037
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3774
diff
changeset
|
3657 } |
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diff
changeset
|
3658 |
e8b0b0392037
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diff
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|
3659 void G1CollectedHeap::print_all_rsets() { |
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3774
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changeset
|
3660 PrintRSetsClosure cl("Printing All RSets");; |
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diff
changeset
|
3661 heap_region_iterate(&cl); |
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|
3662 } |
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|
3663 #endif // PRODUCT |
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|
3664 |
342 | 3665 G1CollectedHeap* G1CollectedHeap::heap() { |
3666 assert(_sh->kind() == CollectedHeap::G1CollectedHeap, | |
3667 "not a garbage-first heap"); | |
3668 return _g1h; | |
3669 } | |
3670 | |
3671 void G1CollectedHeap::gc_prologue(bool full /* Ignored */) { | |
1245
6484c4ee11cb
6904516: More object array barrier fixes, following up on 6906727
ysr
parents:
1166
diff
changeset
|
3672 // always_do_update_barrier = false; |
342 | 3673 assert(InlineCacheBuffer::is_empty(), "should have cleaned up ICBuffer"); |
3674 // Fill TLAB's and such | |
17727 | 3675 accumulate_statistics_all_tlabs(); |
342 | 3676 ensure_parsability(true); |
12339
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
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diff
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|
3677 |
c319b188c7b2
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|
3678 if (G1SummarizeRSetStats && (G1SummarizeRSetStatsPeriod > 0) && |
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tschatzl
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diff
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|
3679 (total_collections() % G1SummarizeRSetStatsPeriod == 0)) { |
c319b188c7b2
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tschatzl
parents:
12305
diff
changeset
|
3680 g1_rem_set()->print_periodic_summary_info("Before GC RS summary"); |
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|
3681 } |
342 | 3682 } |
3683 | |
3684 void G1CollectedHeap::gc_epilogue(bool full /* Ignored */) { | |
10372
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3685 |
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3686 if (G1SummarizeRSetStats && |
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8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3687 (G1SummarizeRSetStatsPeriod > 0) && |
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3688 // 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
|
3689 ((total_collections() - 1) % G1SummarizeRSetStatsPeriod == 0)) { |
12339
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3690 g1_rem_set()->print_periodic_summary_info("After GC RS summary"); |
10372
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3691 } |
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3692 |
342 | 3693 // FIXME: what is this about? |
3694 // I'm ignoring the "fill_newgen()" call if "alloc_event_enabled" | |
3695 // is set. | |
3696 COMPILER2_PRESENT(assert(DerivedPointerTable::is_empty(), | |
3697 "derived pointer present")); | |
1245
6484c4ee11cb
6904516: More object array barrier fixes, following up on 6906727
ysr
parents:
1166
diff
changeset
|
3698 // always_do_update_barrier = true; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3699 |
17727 | 3700 resize_all_tlabs(); |
3701 | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3702 // We have just completed a GC. Update the soft reference |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3703 // policy with the new heap occupancy |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3704 Universe::update_heap_info_at_gc(); |
342 | 3705 } |
3706 | |
1973 | 3707 HeapWord* G1CollectedHeap::do_collection_pause(size_t word_size, |
3708 unsigned int gc_count_before, | |
12113
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
12082
diff
changeset
|
3709 bool* succeeded, |
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
12082
diff
changeset
|
3710 GCCause::Cause gc_cause) { |
1973 | 3711 assert_heap_not_locked_and_not_at_safepoint(); |
342 | 3712 g1_policy()->record_stop_world_start(); |
1973 | 3713 VM_G1IncCollectionPause op(gc_count_before, |
3714 word_size, | |
3715 false, /* should_initiate_conc_mark */ | |
3716 g1_policy()->max_pause_time_ms(), | |
12113
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
12082
diff
changeset
|
3717 gc_cause); |
1973 | 3718 VMThread::execute(&op); |
3719 | |
3720 HeapWord* result = op.result(); | |
3721 bool ret_succeeded = op.prologue_succeeded() && op.pause_succeeded(); | |
3722 assert(result == NULL || ret_succeeded, | |
3723 "the result should be NULL if the VM did not succeed"); | |
3724 *succeeded = ret_succeeded; | |
3725 | |
3726 assert_heap_not_locked(); | |
3727 return result; | |
342 | 3728 } |
3729 | |
3730 void | |
3731 G1CollectedHeap::doConcurrentMark() { | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3732 MutexLockerEx x(CGC_lock, Mutex::_no_safepoint_check_flag); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3733 if (!_cmThread->in_progress()) { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3734 _cmThread->set_started(); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3735 CGC_lock->notify(); |
342 | 3736 } |
3737 } | |
3738 | |
3739 size_t G1CollectedHeap::pending_card_num() { | |
3740 size_t extra_cards = 0; | |
3741 JavaThread *curr = Threads::first(); | |
3742 while (curr != NULL) { | |
3743 DirtyCardQueue& dcq = curr->dirty_card_queue(); | |
3744 extra_cards += dcq.size(); | |
3745 curr = curr->next(); | |
3746 } | |
3747 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
3748 size_t buffer_size = dcqs.buffer_size(); | |
3749 size_t buffer_num = dcqs.completed_buffers_num(); | |
6611 | 3750 |
3751 // PtrQueueSet::buffer_size() and PtrQueue:size() return sizes | |
3752 // in bytes - not the number of 'entries'. We need to convert | |
3753 // into a number of cards. | |
3754 return (buffer_size * buffer_num + extra_cards) / oopSize; | |
342 | 3755 } |
3756 | |
3757 size_t G1CollectedHeap::cards_scanned() { | |
1861 | 3758 return g1_rem_set()->cardsScanned(); |
342 | 3759 } |
3760 | |
3761 void | |
3762 G1CollectedHeap::setup_surviving_young_words() { | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3763 assert(_surviving_young_words == NULL, "pre-condition"); |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3764 uint array_length = g1_policy()->young_cset_region_length(); |
6197 | 3765 _surviving_young_words = NEW_C_HEAP_ARRAY(size_t, (size_t) array_length, mtGC); |
342 | 3766 if (_surviving_young_words == NULL) { |
10161
746b070f5022
8011661: Insufficient memory message says "malloc" when sometimes it should say "mmap"
ccheung
parents:
10099
diff
changeset
|
3767 vm_exit_out_of_memory(sizeof(size_t) * array_length, OOM_MALLOC_ERROR, |
342 | 3768 "Not enough space for young surv words summary."); |
3769 } | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3770 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
|
3771 #ifdef ASSERT |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3772 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
|
3773 assert( _surviving_young_words[i] == 0, "memset above" ); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3774 } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3775 #endif // !ASSERT |
342 | 3776 } |
3777 | |
3778 void | |
3779 G1CollectedHeap::update_surviving_young_words(size_t* surv_young_words) { | |
3780 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
|
3781 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
|
3782 for (uint i = 0; i < array_length; ++i) { |
342 | 3783 _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
|
3784 } |
342 | 3785 } |
3786 | |
3787 void | |
3788 G1CollectedHeap::cleanup_surviving_young_words() { | |
3789 guarantee( _surviving_young_words != NULL, "pre-condition" ); | |
6197 | 3790 FREE_C_HEAP_ARRAY(size_t, _surviving_young_words, mtGC); |
342 | 3791 _surviving_young_words = NULL; |
3792 } | |
3793 | |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3794 #ifdef ASSERT |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3795 class VerifyCSetClosure: public HeapRegionClosure { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3796 public: |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3797 bool doHeapRegion(HeapRegion* hr) { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3798 // 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
|
3799 // 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
|
3800 // 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
|
3801 // 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
|
3802 // 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
|
3803 // 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
|
3804 // 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
|
3805 // 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
|
3806 // evacuation failure handling. |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3807 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
|
3808 |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3809 // 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
|
3810 // perform on CSet regions. |
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3811 return false; |
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3812 } |
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3813 }; |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3814 #endif // ASSERT |
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3815 |
1709 | 3816 #if TASKQUEUE_STATS |
3817 void G1CollectedHeap::print_taskqueue_stats_hdr(outputStream* const st) { | |
3818 st->print_raw_cr("GC Task Stats"); | |
3819 st->print_raw("thr "); TaskQueueStats::print_header(1, st); st->cr(); | |
3820 st->print_raw("--- "); TaskQueueStats::print_header(2, st); st->cr(); | |
3821 } | |
3822 | |
3823 void G1CollectedHeap::print_taskqueue_stats(outputStream* const st) const { | |
3824 print_taskqueue_stats_hdr(st); | |
3825 | |
3826 TaskQueueStats totals; | |
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3827 const int n = workers() != NULL ? workers()->total_workers() : 1; |
1709 | 3828 for (int i = 0; i < n; ++i) { |
3829 st->print("%3d ", i); task_queue(i)->stats.print(st); st->cr(); | |
3830 totals += task_queue(i)->stats; | |
3831 } | |
3832 st->print_raw("tot "); totals.print(st); st->cr(); | |
3833 | |
3834 DEBUG_ONLY(totals.verify()); | |
3835 } | |
3836 | |
3837 void G1CollectedHeap::reset_taskqueue_stats() { | |
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3838 const int n = workers() != NULL ? workers()->total_workers() : 1; |
1709 | 3839 for (int i = 0; i < n; ++i) { |
3840 task_queue(i)->stats.reset(); | |
3841 } | |
3842 } | |
3843 #endif // TASKQUEUE_STATS | |
3844 | |
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3845 void G1CollectedHeap::log_gc_header() { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3846 if (!G1Log::fine()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3847 return; |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3848 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3849 |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3850 gclog_or_tty->date_stamp(PrintGCDateStamps); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3851 gclog_or_tty->stamp(PrintGCTimeStamps); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3852 |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3853 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
|
3854 .append(g1_policy()->gcs_are_young() ? "(young)" : "(mixed)") |
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3855 .append(g1_policy()->during_initial_mark_pause() ? " (initial-mark)" : ""); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3856 |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3857 gclog_or_tty->print("[%s", (const char*)gc_cause_str); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3858 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3859 |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3860 void G1CollectedHeap::log_gc_footer(double pause_time_sec) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3861 if (!G1Log::fine()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3862 return; |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3863 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3864 |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3865 if (G1Log::finer()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3866 if (evacuation_failed()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3867 gclog_or_tty->print(" (to-space exhausted)"); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3868 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3869 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
|
3870 g1_policy()->phase_times()->note_gc_end(); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3871 g1_policy()->phase_times()->print(pause_time_sec); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3872 g1_policy()->print_detailed_heap_transition(); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3873 } else { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3874 if (evacuation_failed()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3875 gclog_or_tty->print("--"); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3876 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3877 g1_policy()->print_heap_transition(); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3878 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
|
3879 } |
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
3880 gclog_or_tty->flush(); |
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3881 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3882 |
1973 | 3883 bool |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3884 G1CollectedHeap::do_collection_pause_at_safepoint(double target_pause_time_ms) { |
2152 | 3885 assert_at_safepoint(true /* should_be_vm_thread */); |
3886 guarantee(!is_gc_active(), "collection is not reentrant"); | |
3887 | |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3888 if (GC_locker::check_active_before_gc()) { |
1973 | 3889 return false; |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3890 } |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3891 |
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
3892 _gc_timer_stw->register_gc_start(); |
10405 | 3893 |
3894 _gc_tracer_stw->report_gc_start(gc_cause(), _gc_timer_stw->gc_start()); | |
3895 | |
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2039
diff
changeset
|
3896 SvcGCMarker sgcm(SvcGCMarker::MINOR); |
2039
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3897 ResourceMark rm; |
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3898 |
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4787
diff
changeset
|
3899 print_heap_before_gc(); |
10405 | 3900 trace_heap_before_gc(_gc_tracer_stw); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3901 |
2152 | 3902 verify_region_sets_optional(); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3903 verify_dirty_young_regions(); |
2152 | 3904 |
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3905 // 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
|
3906 // 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
|
3907 // for the duration of this pause. |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3908 g1_policy()->decide_on_conc_mark_initiation(); |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3909 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3910 // 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
|
3911 assert(!g1_policy()->during_initial_mark_pause() || |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3912 g1_policy()->gcs_are_young(), "sanity"); |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3913 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3914 // 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
|
3915 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
|
3916 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3917 // 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
|
3918 // 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
|
3919 // 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
|
3920 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
|
3921 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3922 // 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
|
3923 { |
10405 | 3924 EvacuationInfo evacuation_info; |
3925 | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3926 if (g1_policy()->during_initial_mark_pause()) { |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3927 // 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
|
3928 // full collection counter. |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
3929 increment_old_marking_cycles_started(); |
10405 | 3930 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
|
3931 } |
10405 | 3932 |
3933 _gc_tracer_stw->report_yc_type(yc_type()); | |
3934 | |
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
3935 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
6030 | 3936 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3937 int active_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3938 workers()->active_workers() : 1); |
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
3939 double pause_start_sec = os::elapsedTime(); |
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
3940 g1_policy()->phase_times()->note_gc_start(active_workers); |
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3941 log_gc_header(); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3942 |
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
3943 TraceCollectorStats tcs(g1mm()->incremental_collection_counters()); |
3356
78542e2b5e35
7036199: Adding a notification to the implementation of GarbageCollectorMXBeans
fparain
parents:
3323
diff
changeset
|
3944 TraceMemoryManagerStats tms(false /* fullGC */, gc_cause()); |
1089
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
tonyp
parents:
1088
diff
changeset
|
3945 |
2361 | 3946 // If the secondary_free_list is not empty, append it to the |
3947 // free_list. No need to wait for the cleanup operation to finish; | |
3948 // the region allocation code will check the secondary_free_list | |
3949 // and wait if necessary. If the G1StressConcRegionFreeing flag is | |
3950 // set, skip this step so that the region allocation code has to | |
3951 // get entries from the secondary_free_list. | |
2152 | 3952 if (!G1StressConcRegionFreeing) { |
2361 | 3953 append_secondary_free_list_if_not_empty_with_lock(); |
2152 | 3954 } |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3955 |
12080 | 3956 assert(check_young_list_well_formed(), "young list should be well formed"); |
3957 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
3958 "sanity check"); | |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3959 |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3960 // 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
|
3961 // 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
|
3962 // it will be set. |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3963 |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3964 { // 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
|
3965 IsGCActiveMark x; |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3966 |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3967 gc_prologue(false); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3968 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
|
3969 increment_gc_time_stamp(); |
342 | 3970 |
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
|
3971 verify_before_gc(); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3972 |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3973 COMPILER2_PRESENT(DerivedPointerTable::clear()); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3974 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3975 // Please see comment in g1CollectedHeap.hpp and |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3976 // G1CollectedHeap::ref_processing_init() to see how |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3977 // reference processing currently works in G1. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3978 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3979 // Enable discovery in the STW reference processor |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3980 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3981 true /*verify_no_refs*/); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3982 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3983 { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3984 // We want to temporarily turn off discovery by the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3985 // CM ref processor, if necessary, and turn it back on |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3986 // on again later if we do. Using a scoped |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3987 // NoRefDiscovery object will do this. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3988 NoRefDiscovery no_cm_discovery(ref_processor_cm()); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3989 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3990 // 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
|
3991 // of the collection set!). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3992 release_mutator_alloc_region(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3993 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3994 // We should call this after we retire the mutator alloc |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3995 // region(s) so that all the ALLOC / RETIRE events are generated |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3996 // before the start GC event. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3997 _hr_printer.start_gc(false /* full */, (size_t) total_collections()); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3998 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3999 // 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
|
4000 // 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
|
4001 // 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
|
4002 // |
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4003 // 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
|
4004 // |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4005 // The elapsed time induced by the start time below deliberately elides |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4006 // 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
|
4007 double sample_start_time_sec = os::elapsedTime(); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4008 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4009 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4010 gclog_or_tty->print_cr("\nBefore recording pause start.\nYoung_list:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4011 _young_list->print(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4012 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
|
4013 #endif // YOUNG_LIST_VERBOSE |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4014 |
10098
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
4015 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
|
4016 |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4017 double scan_wait_start = os::elapsedTime(); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4018 // 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
|
4019 // 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
|
4020 // 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
|
4021 // moving them during the GC. |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4022 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
|
4023 double wait_time_ms = 0.0; |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4024 if (waited) { |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4025 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
|
4026 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
|
4027 } |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4028 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
|
4029 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4030 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
4031 gclog_or_tty->print_cr("\nAfter recording pause start.\nYoung_list:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
4032 _young_list->print(); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4033 #endif // YOUNG_LIST_VERBOSE |
342 | 4034 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
4035 if (g1_policy()->during_initial_mark_pause()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4036 concurrent_mark()->checkpointRootsInitialPre(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4037 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4038 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4039 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4040 gclog_or_tty->print_cr("\nBefore choosing collection set.\nYoung_list:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4041 _young_list->print(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4042 g1_policy()->print_collection_set(g1_policy()->inc_cset_head(), gclog_or_tty); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
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|
4043 #endif // YOUNG_LIST_VERBOSE |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
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diff
changeset
|
4044 |
10405 | 4045 g1_policy()->finalize_cset(target_pause_time_ms, evacuation_info); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
4046 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4047 _cm->note_start_of_gc(); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4048 // We should not verify the per-thread SATB buffers given that |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4049 // we have not filtered them yet (we'll do so during the |
4912
a9647476d1a4
7132029: G1: mixed GC phase lasts for longer than it should
tonyp
parents:
4910
diff
changeset
|
4050 // GC). We also call this after finalize_cset() to |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4051 // ensure that the CSet has been finalized. |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4052 _cm->verify_no_cset_oops(true /* verify_stacks */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4053 true /* verify_enqueued_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4054 false /* verify_thread_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4055 true /* verify_fingers */); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4056 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
4057 if (_hr_printer.is_active()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
4058 HeapRegion* hr = g1_policy()->collection_set(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4059 while (hr != NULL) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4060 G1HRPrinter::RegionType type; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4061 if (!hr->is_young()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4062 type = G1HRPrinter::Old; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4063 } else if (hr->is_survivor()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4064 type = G1HRPrinter::Survivor; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4065 } else { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4066 type = G1HRPrinter::Eden; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4067 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4068 _hr_printer.cset(hr); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4069 hr = hr->next_in_collection_set(); |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4070 } |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4071 } |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4072 |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
4073 #ifdef ASSERT |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4074 VerifyCSetClosure cl; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4075 collection_set_iterate(&cl); |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
4076 #endif // ASSERT |
1707 | 4077 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4078 setup_surviving_young_words(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4079 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4080 // Initialize the GC alloc regions. |
10405 | 4081 init_gc_alloc_regions(evacuation_info); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4082 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4083 // Actually do the work... |
10405 | 4084 evacuate_collection_set(evacuation_info); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4085 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4086 // We do this to mainly verify the per-thread SATB buffers |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4087 // (which have been filtered by now) since we didn't verify |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4088 // them earlier. No point in re-checking the stacks / enqueued |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4089 // buffers given that the CSet has not changed since last time |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4090 // we checked. |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4091 _cm->verify_no_cset_oops(false /* verify_stacks */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4092 false /* verify_enqueued_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4093 true /* verify_thread_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4094 true /* verify_fingers */); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4095 |
10405 | 4096 free_collection_set(g1_policy()->collection_set(), evacuation_info); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4097 g1_policy()->clear_collection_set(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4098 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4099 cleanup_surviving_young_words(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4100 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4101 // Start a new incremental collection set for the next pause. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4102 g1_policy()->start_incremental_cset_building(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4103 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4104 // Clear the _cset_fast_test bitmap in anticipation of adding |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4105 // regions to the incremental collection set for the next |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4106 // evacuation pause. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4107 clear_cset_fast_test(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4108 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4109 _young_list->reset_sampled_info(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4110 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4111 // Don't check the whole heap at this point as the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4112 // GC alloc regions from this pause have been tagged |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4113 // as survivors and moved on to the survivor list. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4114 // Survivor regions will fail the !is_young() check. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4115 assert(check_young_list_empty(false /* check_heap */), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4116 "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
|
4117 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4118 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4119 gclog_or_tty->print_cr("Before recording survivors.\nYoung List:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4120 _young_list->print(); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4121 #endif // YOUNG_LIST_VERBOSE |
342 | 4122 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4123 g1_policy()->record_survivor_regions(_young_list->survivor_length(), |
10405 | 4124 _young_list->first_survivor_region(), |
4125 _young_list->last_survivor_region()); | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4126 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4127 _young_list->reset_auxilary_lists(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4128 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4129 if (evacuation_failed()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4130 _summary_bytes_used = recalculate_used(); |
10405 | 4131 uint n_queues = MAX2((int)ParallelGCThreads, 1); |
4132 for (uint i = 0; i < n_queues; i++) { | |
4133 if (_evacuation_failed_info_array[i].has_failed()) { | |
4134 _gc_tracer_stw->report_evacuation_failed(_evacuation_failed_info_array[i]); | |
4135 } | |
4136 } | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4137 } else { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4138 // The "used" of the the collection set have already been subtracted |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4139 // when they were freed. Add in the bytes evacuated. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4140 _summary_bytes_used += g1_policy()->bytes_copied_during_gc(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4141 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4142 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4143 if (g1_policy()->during_initial_mark_pause()) { |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4144 // 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
|
4145 // 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
|
4146 // appropriate initialization is done on the CM object. |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4147 concurrent_mark()->checkpointRootsInitialPost(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4148 set_marking_started(); |
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4149 // 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
|
4150 // 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
|
4151 // the current thread has completed its logging output. |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4152 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4153 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4154 allocate_dummy_regions(); |
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
4155 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4156 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4157 gclog_or_tty->print_cr("\nEnd of the pause.\nYoung_list:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4158 _young_list->print(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4159 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
|
4160 #endif // YOUNG_LIST_VERBOSE |
342 | 4161 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4162 init_mutator_alloc_region(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4163 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4164 { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4165 size_t expand_bytes = g1_policy()->expansion_amount(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4166 if (expand_bytes > 0) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4167 size_t bytes_before = capacity(); |
4785 | 4168 // No need for an ergo verbose message here, |
4169 // expansion_amount() does this when it returns a value > 0. | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4170 if (!expand(expand_bytes)) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4171 // We failed to expand the heap so let's verify that |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4172 // committed/uncommitted amount match the backing store |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4173 assert(capacity() == _g1_storage.committed_size(), "committed size mismatch"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4174 assert(max_capacity() == _g1_storage.reserved_size(), "reserved size mismatch"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4175 } |
3920
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4176 } |
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4177 } |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4178 |
10405 | 4179 // 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
|
4180 // has just got initialized after the previous CSet was freed. |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4181 _cm->verify_no_cset_oops(true /* verify_stacks */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4182 true /* verify_enqueued_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4183 true /* verify_thread_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4184 true /* verify_fingers */); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4185 _cm->note_end_of_gc(); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4186 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4187 // 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
|
4188 // 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
|
4189 // 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
|
4190 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
|
4191 double pause_time_ms = (sample_end_time_sec - sample_start_time_sec) * MILLIUNITS; |
10405 | 4192 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
|
4193 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4194 MemoryService::track_memory_usage(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4195 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4196 // 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
|
4197 // update buffers to bring the RSets up-to-date if |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4198 // G1HRRSFlushLogBuffersOnVerify has been set. While scanning |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4199 // 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
|
4200 // regions we just allocated to (i.e., the GC alloc |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4201 // regions). However, during the last GC we called |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4202 // set_saved_mark() on all the GC alloc regions, so card |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4203 // scanning might skip the [saved_mark_word()...top()] area of |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4204 // those regions (i.e., the area we allocated objects into |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4205 // during the last GC). But it shouldn't. Given that |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4206 // saved_mark_word() is conditional on whether the GC time stamp |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4207 // 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
|
4208 // 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
|
4209 // regions and saved_mark_word() will simply return top() for |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4210 // 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
|
4211 // than iterating over the regions and fixing them. In fact, the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4212 // GC time stamp increment here also ensures that |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4213 // saved_mark_word() will return top() between pauses, i.e., |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4214 // during concurrent refinement. So we don't need the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4215 // is_gc_active() check to decided which top to use when |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4216 // scanning cards (see CR 7039627). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4217 increment_gc_time_stamp(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4218 |
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
|
4219 verify_after_gc(); |
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 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4222 ref_processor_stw()->verify_no_references_recorded(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4223 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4224 // 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
|
4225 } |
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4226 |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4227 // 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
|
4228 // 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
|
4229 // 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
|
4230 // RETIRE events are generated before the end GC event. |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4231 _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
|
4232 |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4233 if (mark_in_progress()) { |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4234 concurrent_mark()->update_g1_committed(); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4235 } |
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4236 |
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4237 #ifdef TRACESPINNING |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4238 ParallelTaskTerminator::print_termination_counts(); |
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4239 #endif |
342 | 4240 |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4241 gc_epilogue(false); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4242 } |
6121
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4243 |
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
4244 // 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
|
4245 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
|
4246 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4247 // 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
|
4248 // 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
|
4249 // 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
|
4250 // logging output either. |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4251 |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4252 _hrs.verify_optional(); |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4253 verify_region_sets_optional(); |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4254 |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4255 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
|
4256 TASKQUEUE_STATS_ONLY(reset_taskqueue_stats()); |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4257 |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4258 print_heap_after_gc(); |
10405 | 4259 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
|
4260 |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4261 // 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
|
4262 // 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
|
4263 // 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
|
4264 // before any GC notifications are raised. |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4265 g1mm()->update_sizes(); |
10405 | 4266 |
4267 _gc_tracer_stw->report_evacuation_info(&evacuation_info); | |
4268 _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
|
4269 _gc_timer_stw->register_gc_end(); |
10405 | 4270 _gc_tracer_stw->report_gc_end(_gc_timer_stw->gc_end(), _gc_timer_stw->time_partitions()); |
4271 } | |
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4272 // 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
|
4273 // 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
|
4274 // that came from the pause. |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4275 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4276 if (should_start_conc_mark) { |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4277 // CAUTION: after the doConcurrentMark() call below, |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4278 // the concurrent marking thread(s) could be running |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4279 // concurrently with us. Make sure that anything after |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4280 // 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
|
4281 // 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
|
4282 // not start until the safepoint itself is released in |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4283 // ConcurrentGCThread::safepoint_desynchronize(). |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4284 doConcurrentMark(); |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4285 } |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4286 |
1973 | 4287 return true; |
342 | 4288 } |
4289 | |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4290 size_t G1CollectedHeap::desired_plab_sz(GCAllocPurpose purpose) |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4291 { |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4292 size_t gclab_word_size; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4293 switch (purpose) { |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4294 case GCAllocForSurvived: |
6595 | 4295 gclab_word_size = _survivor_plab_stats.desired_plab_sz(); |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4296 break; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4297 case GCAllocForTenured: |
6595 | 4298 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4299 break; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4300 default: |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4301 assert(false, "unknown GCAllocPurpose"); |
6595 | 4302 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4303 break; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4304 } |
6595 | 4305 |
4306 // Prevent humongous PLAB sizes for two reasons: | |
4307 // * PLABs are allocated using a similar paths as oops, but should | |
4308 // never be in a humongous region | |
4309 // * Allowing humongous PLABs needlessly churns the region free lists | |
4310 return MIN2(_humongous_object_threshold_in_words, gclab_word_size); | |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4311 } |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4312 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4313 void G1CollectedHeap::init_mutator_alloc_region() { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4314 assert(_mutator_alloc_region.get() == NULL, "pre-condition"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4315 _mutator_alloc_region.init(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4316 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4317 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4318 void G1CollectedHeap::release_mutator_alloc_region() { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4319 _mutator_alloc_region.release(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4320 assert(_mutator_alloc_region.get() == NULL, "post-condition"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4321 } |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4322 |
10405 | 4323 void G1CollectedHeap::init_gc_alloc_regions(EvacuationInfo& evacuation_info) { |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4324 assert_at_safepoint(true /* should_be_vm_thread */); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4325 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4326 _survivor_gc_alloc_region.init(); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4327 _old_gc_alloc_region.init(); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4328 HeapRegion* retained_region = _retained_old_gc_alloc_region; |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4329 _retained_old_gc_alloc_region = NULL; |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4330 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4331 // We will discard the current GC alloc region if: |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4332 // a) it's in the collection set (it can happen!), |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4333 // b) it's already full (no point in using it), |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4334 // c) it's empty (this means that it was emptied during |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4335 // a cleanup and it should be on the free list now), or |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4336 // d) it's humongous (this means that it was emptied |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4337 // during a cleanup and was added to the free list, but |
10405 | 4338 // has been subsequently used to allocate a humongous |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4339 // object that may be less than the region size). |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4340 if (retained_region != NULL && |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4341 !retained_region->in_collection_set() && |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4342 !(retained_region->top() == retained_region->end()) && |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4343 !retained_region->is_empty() && |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4344 !retained_region->isHumongous()) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4345 retained_region->set_saved_mark(); |
4072 | 4346 // The retained region was added to the old region set when it was |
4347 // retired. We have to remove it now, since we don't allow regions | |
4348 // we allocate to in the region sets. We'll re-add it later, when | |
4349 // it's retired again. | |
4350 _old_set.remove(retained_region); | |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4351 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
|
4352 retained_region->note_start_of_copying(during_im); |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4353 _old_gc_alloc_region.set(retained_region); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4354 _hr_printer.reuse(retained_region); |
10405 | 4355 evacuation_info.set_alloc_regions_used_before(retained_region->used()); |
4356 } | |
4357 } | |
4358 | |
4359 void G1CollectedHeap::release_gc_alloc_regions(uint no_of_gc_workers, EvacuationInfo& evacuation_info) { | |
4360 evacuation_info.set_allocation_regions(_survivor_gc_alloc_region.count() + | |
4361 _old_gc_alloc_region.count()); | |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4362 _survivor_gc_alloc_region.release(); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4363 // If we have an old GC alloc region to release, we'll save it in |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4364 // _retained_old_gc_alloc_region. If we don't |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4365 // _retained_old_gc_alloc_region will become NULL. This is what we |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4366 // want either way so no reason to check explicitly for either |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4367 // condition. |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4368 _retained_old_gc_alloc_region = _old_gc_alloc_region.release(); |
6595 | 4369 |
4370 if (ResizePLAB) { | |
6819 | 4371 _survivor_plab_stats.adjust_desired_plab_sz(no_of_gc_workers); |
4372 _old_plab_stats.adjust_desired_plab_sz(no_of_gc_workers); | |
6595 | 4373 } |
342 | 4374 } |
4375 | |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4376 void G1CollectedHeap::abandon_gc_alloc_regions() { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4377 assert(_survivor_gc_alloc_region.get() == NULL, "pre-condition"); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4378 assert(_old_gc_alloc_region.get() == NULL, "pre-condition"); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4379 _retained_old_gc_alloc_region = NULL; |
342 | 4380 } |
4381 | |
4382 void G1CollectedHeap::init_for_evac_failure(OopsInHeapRegionClosure* cl) { | |
4383 _drain_in_progress = false; | |
4384 set_evac_failure_closure(cl); | |
6197 | 4385 _evac_failure_scan_stack = new (ResourceObj::C_HEAP, mtGC) GrowableArray<oop>(40, true); |
342 | 4386 } |
4387 | |
4388 void G1CollectedHeap::finalize_for_evac_failure() { | |
4389 assert(_evac_failure_scan_stack != NULL && | |
4390 _evac_failure_scan_stack->length() == 0, | |
4391 "Postcondition"); | |
4392 assert(!_drain_in_progress, "Postcondition"); | |
1045 | 4393 delete _evac_failure_scan_stack; |
342 | 4394 _evac_failure_scan_stack = NULL; |
4395 } | |
4396 | |
4397 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
|
4398 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
|
4399 |
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4400 double remove_self_forwards_start = os::elapsedTime(); |
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4401 |
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4402 G1ParRemoveSelfForwardPtrsTask rsfp_task(this); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4403 |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4404 if (G1CollectedHeap::use_parallel_gc_threads()) { |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4405 set_par_threads(); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4406 workers()->run_task(&rsfp_task); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4407 set_par_threads(0); |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
4408 } else { |
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4409 rsfp_task.work(0); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4410 } |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4411 |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4412 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
|
4413 |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4414 // 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
|
4415 reset_cset_heap_region_claim_values(); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4416 |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4417 assert(check_cset_heap_region_claim_values(HeapRegion::InitialClaimValue), "sanity"); |
342 | 4418 |
4419 // 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
|
4420 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
|
4421 _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
|
4422 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
|
4423 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
|
4424 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
|
4425 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
|
4426 } |
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4427 _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
|
4428 _preserved_marks_of_objs.clear(true); |
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4429 |
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4430 g1_policy()->phase_times()->record_evac_fail_remove_self_forwards((os::elapsedTime() - remove_self_forwards_start) * 1000.0); |
342 | 4431 } |
4432 | |
4433 void G1CollectedHeap::push_on_evac_failure_scan_stack(oop obj) { | |
4434 _evac_failure_scan_stack->push(obj); | |
4435 } | |
4436 | |
4437 void G1CollectedHeap::drain_evac_failure_scan_stack() { | |
4438 assert(_evac_failure_scan_stack != NULL, "precondition"); | |
4439 | |
4440 while (_evac_failure_scan_stack->length() > 0) { | |
4441 oop obj = _evac_failure_scan_stack->pop(); | |
4442 _evac_failure_closure->set_region(heap_region_containing(obj)); | |
4443 obj->oop_iterate_backwards(_evac_failure_closure); | |
4444 } | |
4445 } | |
4446 | |
4447 oop | |
10405 | 4448 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
|
4449 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
|
4450 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
|
4451 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
|
4452 (HeapWord*) old)); |
342 | 4453 markOop m = old->mark(); |
4454 oop forward_ptr = old->forward_to_atomic(old); | |
4455 if (forward_ptr == NULL) { | |
4456 // Forward-to-self succeeded. | |
10405 | 4457 assert(_par_scan_state != NULL, "par scan state"); |
4458 OopsInHeapRegionClosure* cl = _par_scan_state->evac_failure_closure(); | |
4459 uint queue_num = _par_scan_state->queue_num(); | |
4460 | |
4461 _evacuation_failed = true; | |
4462 _evacuation_failed_info_array[queue_num].register_copy_failure(old->size()); | |
342 | 4463 if (_evac_failure_closure != cl) { |
4464 MutexLockerEx x(EvacFailureStack_lock, Mutex::_no_safepoint_check_flag); | |
4465 assert(!_drain_in_progress, | |
4466 "Should only be true while someone holds the lock."); | |
4467 // Set the global evac-failure closure to the current thread's. | |
4468 assert(_evac_failure_closure == NULL, "Or locking has failed."); | |
4469 set_evac_failure_closure(cl); | |
4470 // Now do the common part. | |
4471 handle_evacuation_failure_common(old, m); | |
4472 // Reset to NULL. | |
4473 set_evac_failure_closure(NULL); | |
4474 } else { | |
4475 // The lock is already held, and this is recursive. | |
4476 assert(_drain_in_progress, "This should only be the recursive case."); | |
4477 handle_evacuation_failure_common(old, m); | |
4478 } | |
4479 return old; | |
4480 } 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
|
4481 // 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
|
4482 // 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
|
4483 // 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
|
4484 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
|
4485 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
|
4486 "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
|
4487 (HeapWord*) old, (HeapWord*) forward_ptr)); |
342 | 4488 return forward_ptr; |
4489 } | |
4490 } | |
4491 | |
4492 void G1CollectedHeap::handle_evacuation_failure_common(oop old, markOop m) { | |
4493 preserve_mark_if_necessary(old, m); | |
4494 | |
4495 HeapRegion* r = heap_region_containing(old); | |
4496 if (!r->evacuation_failed()) { | |
4497 r->set_evacuation_failed(true); | |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4498 _hr_printer.evac_failure(r); |
342 | 4499 } |
4500 | |
4501 push_on_evac_failure_scan_stack(old); | |
4502 | |
4503 if (!_drain_in_progress) { | |
4504 // prevent recursion in copy_to_survivor_space() | |
4505 _drain_in_progress = true; | |
4506 drain_evac_failure_scan_stack(); | |
4507 _drain_in_progress = false; | |
4508 } | |
4509 } | |
4510 | |
4511 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
|
4512 assert(evacuation_failed(), "Oversaving!"); |
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4513 // 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
|
4514 // case of a promotion failure. |
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4515 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
|
4516 _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
|
4517 _preserved_marks_of_objs.push(m); |
342 | 4518 } |
4519 } | |
4520 | |
4521 HeapWord* G1CollectedHeap::par_allocate_during_gc(GCAllocPurpose purpose, | |
4522 size_t word_size) { | |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4523 if (purpose == GCAllocForSurvived) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4524 HeapWord* result = survivor_attempt_allocation(word_size); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4525 if (result != NULL) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4526 return result; |
342 | 4527 } else { |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4528 // Let's try to allocate in the old gen in case we can fit the |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4529 // object there. |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4530 return old_attempt_allocation(word_size); |
342 | 4531 } |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4532 } else { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4533 assert(purpose == GCAllocForTenured, "sanity"); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4534 HeapWord* result = old_attempt_allocation(word_size); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4535 if (result != NULL) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4536 return result; |
342 | 4537 } else { |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4538 // Let's try to allocate in the survivors in case we can fit the |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4539 // object there. |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4540 return survivor_attempt_allocation(word_size); |
342 | 4541 } |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4542 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4543 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4544 ShouldNotReachHere(); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4545 // Trying to keep some compilers happy. |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4546 return NULL; |
342 | 4547 } |
4548 | |
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4549 G1ParGCAllocBuffer::G1ParGCAllocBuffer(size_t gclab_word_size) : |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4550 ParGCAllocBuffer(gclab_word_size), _retired(false) { } |
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4551 |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4552 G1ParScanThreadState::G1ParScanThreadState(G1CollectedHeap* g1h, uint queue_num, ReferenceProcessor* rp) |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4553 : _g1h(g1h), |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4554 _refs(g1h->task_queue(queue_num)), |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4555 _dcq(&g1h->dirty_card_queue_set()), |
12343 | 4556 _ct_bs(g1h->g1_barrier_set()), |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4557 _g1_rem(g1h->g1_rem_set()), |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4558 _hash_seed(17), _queue_num(queue_num), |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4559 _term_attempts(0), |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4560 _surviving_alloc_buffer(g1h->desired_plab_sz(GCAllocForSurvived)), |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4561 _tenured_alloc_buffer(g1h->desired_plab_sz(GCAllocForTenured)), |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4562 _age_table(false), _scanner(g1h, this, rp), |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4563 _strong_roots_time(0), _term_time(0), |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4564 _alloc_buffer_waste(0), _undo_waste(0) { |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4565 // we allocate G1YoungSurvRateNumRegions plus one entries, since |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4566 // we "sacrifice" entry 0 to keep track of surviving bytes for |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4567 // non-young regions (where the age is -1) |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4568 // We also add a few elements at the beginning and at the end in |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4569 // an attempt to eliminate cache contention |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4570 uint real_length = 1 + _g1h->g1_policy()->young_cset_region_length(); |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4571 uint array_length = PADDING_ELEM_NUM + |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4572 real_length + |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4573 PADDING_ELEM_NUM; |
6197 | 4574 _surviving_young_words_base = NEW_C_HEAP_ARRAY(size_t, array_length, mtGC); |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4575 if (_surviving_young_words_base == NULL) |
10161
746b070f5022
8011661: Insufficient memory message says "malloc" when sometimes it should say "mmap"
ccheung
parents:
10099
diff
changeset
|
4576 vm_exit_out_of_memory(array_length * sizeof(size_t), OOM_MALLOC_ERROR, |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4577 "Not enough space for young surv histo."); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4578 _surviving_young_words = _surviving_young_words_base + PADDING_ELEM_NUM; |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4579 memset(_surviving_young_words, 0, (size_t) real_length * sizeof(size_t)); |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4580 |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4581 _alloc_buffers[GCAllocForSurvived] = &_surviving_alloc_buffer; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4582 _alloc_buffers[GCAllocForTenured] = &_tenured_alloc_buffer; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4583 |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4584 _start = os::elapsedTime(); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4585 } |
342 | 4586 |
1709 | 4587 void |
4588 G1ParScanThreadState::print_termination_stats_hdr(outputStream* const st) | |
4589 { | |
4590 st->print_raw_cr("GC Termination Stats"); | |
4591 st->print_raw_cr(" elapsed --strong roots-- -------termination-------" | |
4592 " ------waste (KiB)------"); | |
4593 st->print_raw_cr("thr ms ms % ms % attempts" | |
4594 " total alloc undo"); | |
4595 st->print_raw_cr("--- --------- --------- ------ --------- ------ --------" | |
4596 " ------- ------- -------"); | |
4597 } | |
4598 | |
4599 void | |
4600 G1ParScanThreadState::print_termination_stats(int i, | |
4601 outputStream* const st) const | |
4602 { | |
4603 const double elapsed_ms = elapsed_time() * 1000.0; | |
4604 const double s_roots_ms = strong_roots_time() * 1000.0; | |
4605 const double term_ms = term_time() * 1000.0; | |
4606 st->print_cr("%3d %9.2f %9.2f %6.2f " | |
4607 "%9.2f %6.2f " SIZE_FORMAT_W(8) " " | |
4608 SIZE_FORMAT_W(7) " " SIZE_FORMAT_W(7) " " SIZE_FORMAT_W(7), | |
4609 i, elapsed_ms, s_roots_ms, s_roots_ms * 100 / elapsed_ms, | |
4610 term_ms, term_ms * 100 / elapsed_ms, term_attempts(), | |
4611 (alloc_buffer_waste() + undo_waste()) * HeapWordSize / K, | |
4612 alloc_buffer_waste() * HeapWordSize / K, | |
4613 undo_waste() * HeapWordSize / K); | |
4614 } | |
4615 | |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4616 #ifdef ASSERT |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4617 bool G1ParScanThreadState::verify_ref(narrowOop* ref) const { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4618 assert(ref != NULL, "invariant"); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4619 assert(UseCompressedOops, "sanity"); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4620 assert(!has_partial_array_mask(ref), err_msg("ref=" PTR_FORMAT, ref)); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4621 oop p = oopDesc::load_decode_heap_oop(ref); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4622 assert(_g1h->is_in_g1_reserved(p), |
12316
190899198332
7195622: CheckUnhandledOops has limited usefulness now
hseigel
parents:
12233
diff
changeset
|
4623 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, (void *)p)); |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4624 return true; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4625 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4626 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4627 bool G1ParScanThreadState::verify_ref(oop* ref) const { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4628 assert(ref != NULL, "invariant"); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4629 if (has_partial_array_mask(ref)) { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4630 // Must be in the collection set--it's already been copied. |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4631 oop p = clear_partial_array_mask(ref); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4632 assert(_g1h->obj_in_cs(p), |
12316
190899198332
7195622: CheckUnhandledOops has limited usefulness now
hseigel
parents:
12233
diff
changeset
|
4633 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, (void *)p)); |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4634 } else { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4635 oop p = oopDesc::load_decode_heap_oop(ref); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4636 assert(_g1h->is_in_g1_reserved(p), |
12316
190899198332
7195622: CheckUnhandledOops has limited usefulness now
hseigel
parents:
12233
diff
changeset
|
4637 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, (void *)p)); |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4638 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4639 return true; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4640 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4641 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4642 bool G1ParScanThreadState::verify_task(StarTask ref) const { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4643 if (ref.is_narrow()) { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4644 return verify_ref((narrowOop*) ref); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4645 } else { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4646 return verify_ref((oop*) ref); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4647 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4648 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4649 #endif // ASSERT |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4650 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4651 void G1ParScanThreadState::trim_queue() { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4652 assert(_evac_failure_cl != NULL, "not set"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4653 |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4654 StarTask ref; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4655 do { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4656 // Drain the overflow stack first, so other threads can steal. |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4657 while (refs()->pop_overflow(ref)) { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4658 deal_with_reference(ref); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4659 } |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4660 |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4661 while (refs()->pop_local(ref)) { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4662 deal_with_reference(ref); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4663 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4664 } while (!refs()->is_empty()); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4665 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4666 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4667 G1ParClosureSuper::G1ParClosureSuper(G1CollectedHeap* g1, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4668 G1ParScanThreadState* par_scan_state) : |
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4669 _g1(g1), _par_scan_state(par_scan_state), |
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4670 _worker_id(par_scan_state->queue_num()) { } |
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4671 |
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4672 void G1ParCopyHelper::mark_object(oop obj) { |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4673 #ifdef ASSERT |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4674 HeapRegion* hr = _g1->heap_region_containing(obj); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4675 assert(hr != NULL, "sanity"); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4676 assert(!hr->in_collection_set(), "should not mark objects in the CSet"); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4677 #endif // ASSERT |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4678 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4679 // 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
|
4680 _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
|
4681 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4682 |
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4683 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
|
4684 #ifdef ASSERT |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4685 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
|
4686 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
|
4687 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
|
4688 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4689 HeapRegion* from_hr = _g1->heap_region_containing(from_obj); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4690 assert(from_hr != NULL, "sanity"); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4691 assert(from_hr->in_collection_set(), "from obj should be in the CSet"); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4692 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4693 HeapRegion* to_hr = _g1->heap_region_containing(to_obj); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4694 assert(to_hr != NULL, "sanity"); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4695 assert(!to_hr->in_collection_set(), "should not mark objects in the CSet"); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4696 #endif // ASSERT |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4697 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4698 // 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
|
4699 // 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
|
4700 // 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
|
4701 // image which we know should not be changing. |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4702 _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
|
4703 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4704 |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4705 oop G1ParScanThreadState::copy_to_survivor_space(oop const old) { |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4706 size_t word_sz = old->size(); |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4707 HeapRegion* from_region = _g1h->heap_region_containing_raw(old); |
342 | 4708 // +1 to make the -1 indexes valid... |
4709 int young_index = from_region->young_index_in_cset()+1; | |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4710 assert( (from_region->is_young() && young_index > 0) || |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4711 (!from_region->is_young() && young_index == 0), "invariant" ); |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4712 G1CollectorPolicy* g1p = _g1h->g1_policy(); |
342 | 4713 markOop m = old->mark(); |
545 | 4714 int age = m->has_displaced_mark_helper() ? m->displaced_mark_helper()->age() |
4715 : m->age(); | |
4716 GCAllocPurpose alloc_purpose = g1p->evacuation_destination(from_region, age, | |
342 | 4717 word_sz); |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4718 HeapWord* obj_ptr = allocate(alloc_purpose, word_sz); |
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4719 #ifndef PRODUCT |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4720 // Should this evacuation fail? |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4721 if (_g1h->evacuation_should_fail()) { |
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4722 if (obj_ptr != NULL) { |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4723 undo_allocation(alloc_purpose, obj_ptr, word_sz); |
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4724 obj_ptr = NULL; |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4725 } |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4726 } |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4727 #endif // !PRODUCT |
342 | 4728 |
4729 if (obj_ptr == NULL) { | |
4730 // This will either forward-to-self, or detect that someone else has | |
4731 // installed a forwarding pointer. | |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4732 return _g1h->handle_evacuation_failure_par(this, old); |
342 | 4733 } |
4734 | |
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4735 oop obj = oop(obj_ptr); |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4736 |
526 | 4737 // We're going to allocate linearly, so might as well prefetch ahead. |
4738 Prefetch::write(obj_ptr, PrefetchCopyIntervalInBytes); | |
4739 | |
342 | 4740 oop forward_ptr = old->forward_to_atomic(obj); |
4741 if (forward_ptr == NULL) { | |
4742 Copy::aligned_disjoint_words((HeapWord*) old, obj_ptr, word_sz); | |
17749
b7e42ada4898
8036672: G1: alloc_purpose in copy_to_survivor_space() used incorrectly
pliden
parents:
17748
diff
changeset
|
4743 |
b7e42ada4898
8036672: G1: alloc_purpose in copy_to_survivor_space() used incorrectly
pliden
parents:
17748
diff
changeset
|
4744 // alloc_purpose is just a hint to allocate() above, recheck the type of region |
b7e42ada4898
8036672: G1: alloc_purpose in copy_to_survivor_space() used incorrectly
pliden
parents:
17748
diff
changeset
|
4745 // we actually allocated from and update alloc_purpose accordingly |
b7e42ada4898
8036672: G1: alloc_purpose in copy_to_survivor_space() used incorrectly
pliden
parents:
17748
diff
changeset
|
4746 HeapRegion* to_region = _g1h->heap_region_containing_raw(obj_ptr); |
b7e42ada4898
8036672: G1: alloc_purpose in copy_to_survivor_space() used incorrectly
pliden
parents:
17748
diff
changeset
|
4747 alloc_purpose = to_region->is_young() ? GCAllocForSurvived : GCAllocForTenured; |
b7e42ada4898
8036672: G1: alloc_purpose in copy_to_survivor_space() used incorrectly
pliden
parents:
17748
diff
changeset
|
4748 |
526 | 4749 if (g1p->track_object_age(alloc_purpose)) { |
4750 // We could simply do obj->incr_age(). However, this causes a | |
4751 // performance issue. obj->incr_age() will first check whether | |
4752 // the object has a displaced mark by checking its mark word; | |
4753 // getting the mark word from the new location of the object | |
4754 // stalls. So, given that we already have the mark word and we | |
4755 // are about to install it anyway, it's better to increase the | |
4756 // age on the mark word, when the object does not have a | |
4757 // displaced mark word. We're not expecting many objects to have | |
4758 // a displaced marked word, so that case is not optimized | |
4759 // further (it could be...) and we simply call obj->incr_age(). | |
4760 | |
4761 if (m->has_displaced_mark_helper()) { | |
4762 // in this case, we have to install the mark word first, | |
4763 // otherwise obj looks to be forwarded (the old mark word, | |
4764 // which contains the forward pointer, was copied) | |
4765 obj->set_mark(m); | |
4766 obj->incr_age(); | |
4767 } else { | |
4768 m = m->incr_age(); | |
545 | 4769 obj->set_mark(m); |
526 | 4770 } |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4771 age_table()->add(obj, word_sz); |
545 | 4772 } else { |
4773 obj->set_mark(m); | |
526 | 4774 } |
4775 | |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4776 size_t* surv_young_words = surviving_young_words(); |
342 | 4777 surv_young_words[young_index] += word_sz; |
4778 | |
4779 if (obj->is_objArray() && arrayOop(obj)->length() >= ParGCArrayScanChunk) { | |
4784
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4780 // We keep track of the next start index in the length field of |
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4781 // the to-space object. The actual length can be found in the |
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4782 // length field of the from-space object. |
02838862dec8
7121623: G1: always be able to reliably calculate the length of a forwarded chunked array
tonyp
parents:
4783
diff
changeset
|
4783 arrayOop(obj)->set_length(0); |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4784 oop* old_p = set_partial_array_mask(old); |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4785 push_on_queue(old_p); |
342 | 4786 } else { |
526 | 4787 // No point in using the slower heap_region_containing() method, |
4788 // given that we know obj is in the heap. | |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4789 _scanner.set_region(_g1h->heap_region_containing_raw(obj)); |
5987 | 4790 obj->oop_iterate_backwards(&_scanner); |
342 | 4791 } |
4792 } else { | |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4793 undo_allocation(alloc_purpose, obj_ptr, word_sz); |
342 | 4794 obj = forward_ptr; |
4795 } | |
4796 return obj; | |
4797 } | |
4798 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4799 template <class T> |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4800 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
|
4801 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
|
4802 _scanned_klass->record_modified_oops(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4803 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4804 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4805 |
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4806 template <G1Barrier barrier, bool do_mark_object> |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4807 template <class T> |
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4808 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
|
4809 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
|
4810 |
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4811 if (oopDesc::is_null(heap_oop)) { |
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4812 return; |
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4813 } |
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4814 |
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4815 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
|
4816 |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4817 assert(_worker_id == _par_scan_state->queue_num(), "sanity"); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4818 |
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
4819 if (_g1->in_cset_fast_test(obj)) { |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4820 oop forwardee; |
526 | 4821 if (obj->is_forwarded()) { |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4822 forwardee = obj->forwardee(); |
526 | 4823 } else { |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4824 forwardee = _par_scan_state->copy_to_survivor_space(obj); |
342 | 4825 } |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4826 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
|
4827 oopDesc::encode_store_heap_oop(p, forwardee); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4828 if (do_mark_object && forwardee != obj) { |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4829 // 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
|
4830 // 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
|
4831 mark_forwarded_object(obj, forwardee); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4832 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4833 |
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4834 if (barrier == G1BarrierKlass) { |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4835 do_klass_barrier(p, forwardee); |
342 | 4836 } |
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4837 } else { |
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4838 // The object is not in collection set. If we're a root scanning |
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4839 // closure during an initial mark pause (i.e. do_mark_object will |
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4840 // be true) then attempt to mark the object. |
17688
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4841 if (do_mark_object) { |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4842 mark_object(obj); |
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4843 } |
526 | 4844 } |
4845 | |
17688
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4846 if (barrier == G1BarrierEvac) { |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4847 _par_scan_state->update_rs(_from, p, _worker_id); |
526 | 4848 } |
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4849 } |
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4850 |
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4851 template void G1ParCopyClosure<G1BarrierEvac, false>::do_oop_work(oop* p); |
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4852 template void G1ParCopyClosure<G1BarrierEvac, false>::do_oop_work(narrowOop* p); |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4853 |
342 | 4854 class G1ParEvacuateFollowersClosure : public VoidClosure { |
4855 protected: | |
4856 G1CollectedHeap* _g1h; | |
4857 G1ParScanThreadState* _par_scan_state; | |
4858 RefToScanQueueSet* _queues; | |
4859 ParallelTaskTerminator* _terminator; | |
4860 | |
4861 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } | |
4862 RefToScanQueueSet* queues() { return _queues; } | |
4863 ParallelTaskTerminator* terminator() { return _terminator; } | |
4864 | |
4865 public: | |
4866 G1ParEvacuateFollowersClosure(G1CollectedHeap* g1h, | |
4867 G1ParScanThreadState* par_scan_state, | |
4868 RefToScanQueueSet* queues, | |
4869 ParallelTaskTerminator* terminator) | |
4870 : _g1h(g1h), _par_scan_state(par_scan_state), | |
4871 _queues(queues), _terminator(terminator) {} | |
4872 | |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4873 void do_void(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4874 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4875 private: |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4876 inline bool offer_termination(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4877 }; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4878 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4879 bool G1ParEvacuateFollowersClosure::offer_termination() { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4880 G1ParScanThreadState* const pss = par_scan_state(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4881 pss->start_term_time(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4882 const bool res = terminator()->offer_termination(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4883 pss->end_term_time(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4884 return res; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4885 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4886 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4887 void G1ParEvacuateFollowersClosure::do_void() { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4888 StarTask stolen_task; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4889 G1ParScanThreadState* const pss = par_scan_state(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4890 pss->trim_queue(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4891 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4892 do { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4893 while (queues()->steal(pss->queue_num(), pss->hash_seed(), stolen_task)) { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4894 assert(pss->verify_task(stolen_task), "sanity"); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4895 if (stolen_task.is_narrow()) { |
1883
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
1862
diff
changeset
|
4896 pss->deal_with_reference((narrowOop*) stolen_task); |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4897 } else { |
1883
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
1862
diff
changeset
|
4898 pss->deal_with_reference((oop*) stolen_task); |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4899 } |
1883
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
1862
diff
changeset
|
4900 |
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
1862
diff
changeset
|
4901 // We've just processed a reference and we might have made |
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
1862
diff
changeset
|
4902 // available new entries on the queues. So we have to make sure |
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
1862
diff
changeset
|
4903 // we drain the queues as necessary. |
342 | 4904 pss->trim_queue(); |
4905 } | |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4906 } while (!offer_termination()); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4907 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4908 pss->retire_alloc_buffers(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4909 } |
342 | 4910 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4911 class G1KlassScanClosure : public KlassClosure { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4912 G1ParCopyHelper* _closure; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4913 bool _process_only_dirty; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4914 int _count; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4915 public: |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4916 G1KlassScanClosure(G1ParCopyHelper* closure, bool process_only_dirty) |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4917 : _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
|
4918 void do_klass(Klass* klass) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4919 // 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
|
4920 // 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
|
4921 if (!_process_only_dirty || klass->has_modified_oops()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4922 // 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
|
4923 klass->clear_modified_oops(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4924 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4925 // 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
|
4926 // 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
|
4927 _closure->set_scanned_klass(klass); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4928 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4929 klass->oops_do(_closure); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4930 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4931 _closure->set_scanned_klass(NULL); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4932 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4933 _count++; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4934 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4935 }; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4936 |
342 | 4937 class G1ParTask : public AbstractGangTask { |
4938 protected: | |
4939 G1CollectedHeap* _g1h; | |
4940 RefToScanQueueSet *_queues; | |
4941 ParallelTaskTerminator _terminator; | |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
4942 uint _n_workers; |
342 | 4943 |
4944 Mutex _stats_lock; | |
4945 Mutex* stats_lock() { return &_stats_lock; } | |
4946 | |
4947 size_t getNCards() { | |
4948 return (_g1h->capacity() + G1BlockOffsetSharedArray::N_bytes - 1) | |
4949 / G1BlockOffsetSharedArray::N_bytes; | |
4950 } | |
4951 | |
4952 public: | |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4953 G1ParTask(G1CollectedHeap* g1h, |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4954 RefToScanQueueSet *task_queues) |
342 | 4955 : AbstractGangTask("G1 collection"), |
4956 _g1h(g1h), | |
4957 _queues(task_queues), | |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4958 _terminator(0, _queues), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4959 _stats_lock(Mutex::leaf, "parallel G1 stats lock", true) |
342 | 4960 {} |
4961 | |
4962 RefToScanQueueSet* queues() { return _queues; } | |
4963 | |
4964 RefToScanQueue *work_queue(int i) { | |
4965 return queues()->queue(i); | |
4966 } | |
4967 | |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4968 ParallelTaskTerminator* terminator() { return &_terminator; } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4969 |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4970 virtual void set_for_termination(int active_workers) { |
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4971 // This task calls set_n_termination() in par_non_clean_card_iterate_work() |
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|
4972 // in the young space (_par_seq_tasks) in the G1 heap |
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|
4973 // for SequentialSubTasksDone. |
bca17e38de00
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|
4974 // This task also uses SubTasksDone in SharedHeap and G1CollectedHeap |
bca17e38de00
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|
4975 // both of which need setting by set_n_termination(). |
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|
4976 _g1h->SharedHeap::set_n_termination(active_workers); |
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|
4977 _g1h->set_n_termination(active_workers); |
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|
4978 terminator()->reset_for_reuse(active_workers); |
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|
4979 _n_workers = active_workers; |
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|
4980 } |
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diff
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|
4981 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
4982 void work(uint worker_id) { |
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7121618: Change type of number of GC workers to unsigned int.
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diff
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|
4983 if (worker_id >= _n_workers) return; // no work needed this round |
1611 | 4984 |
4985 double start_time_ms = os::elapsedTime() * 1000.0; | |
6219
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4986 _g1h->g1_policy()->phase_times()->record_gc_worker_start_time(worker_id, start_time_ms); |
1611 | 4987 |
5986
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|
4988 { |
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|
4989 ResourceMark rm; |
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diff
changeset
|
4990 HandleMark hm; |
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|
4991 |
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|
4992 ReferenceProcessor* rp = _g1h->ref_processor_stw(); |
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|
4993 |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4994 G1ParScanThreadState pss(_g1h, worker_id, rp); |
5986
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changeset
|
4995 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, rp); |
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
4996 |
5986
500023bd0818
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|
4997 pss.set_evac_failure_closure(&evac_failure_cl); |
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|
4998 |
500023bd0818
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|
4999 G1ParScanExtRootClosure only_scan_root_cl(_g1h, &pss, rp); |
6725
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6964458: Reimplement class meta-data storage to use native memory
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|
5000 G1ParScanMetadataClosure only_scan_metadata_cl(_g1h, &pss, rp); |
5986
500023bd0818
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|
5001 |
500023bd0818
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|
5002 G1ParScanAndMarkExtRootClosure scan_mark_root_cl(_g1h, &pss, rp); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
5003 G1ParScanAndMarkMetadataClosure scan_mark_metadata_cl(_g1h, &pss, rp); |
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6964458: Reimplement class meta-data storage to use native memory
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|
5004 |
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6964458: Reimplement class meta-data storage to use native memory
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|
5005 bool only_young = _g1h->g1_policy()->gcs_are_young(); |
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6964458: Reimplement class meta-data storage to use native memory
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|
5006 G1KlassScanClosure scan_mark_klasses_cl_s(&scan_mark_metadata_cl, false); |
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|
5007 G1KlassScanClosure only_scan_klasses_cl_s(&only_scan_metadata_cl, only_young); |
5986
500023bd0818
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|
5008 |
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diff
changeset
|
5009 OopClosure* scan_root_cl = &only_scan_root_cl; |
6725
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6964458: Reimplement class meta-data storage to use native memory
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|
5010 G1KlassScanClosure* scan_klasses_cl = &only_scan_klasses_cl_s; |
5986
500023bd0818
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diff
changeset
|
5011 |
500023bd0818
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diff
changeset
|
5012 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
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parents:
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diff
changeset
|
5013 // We also need to mark copied objects. |
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parents:
5963
diff
changeset
|
5014 scan_root_cl = &scan_mark_root_cl; |
6725
da91efe96a93
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|
5015 scan_klasses_cl = &scan_mark_klasses_cl_s; |
5986
500023bd0818
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diff
changeset
|
5016 } |
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diff
changeset
|
5017 |
500023bd0818
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parents:
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diff
changeset
|
5018 G1ParPushHeapRSClosure push_heap_rs_cl(_g1h, &pss); |
500023bd0818
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parents:
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diff
changeset
|
5019 |
12080 | 5020 // Don't scan the scavengable methods in the code cache as part |
5021 // of strong root scanning. The code roots that point into a | |
5022 // region in the collection set are scanned when we scan the | |
5023 // region's RSet. | |
5024 int so = SharedHeap::SO_AllClasses | SharedHeap::SO_Strings; | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
5025 |
5986
500023bd0818
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diff
changeset
|
5026 pss.start_strong_roots(); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
5027 _g1h->g1_process_strong_roots(/* is scavenging */ true, |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
5028 SharedHeap::ScanningOption(so), |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
5029 scan_root_cl, |
500023bd0818
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parents:
5963
diff
changeset
|
5030 &push_heap_rs_cl, |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
5031 scan_klasses_cl, |
5986
500023bd0818
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5963
diff
changeset
|
5032 worker_id); |
500023bd0818
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parents:
5963
diff
changeset
|
5033 pss.end_strong_roots(); |
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parents:
5963
diff
changeset
|
5034 |
500023bd0818
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parents:
5963
diff
changeset
|
5035 { |
500023bd0818
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parents:
5963
diff
changeset
|
5036 double start = os::elapsedTime(); |
500023bd0818
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parents:
5963
diff
changeset
|
5037 G1ParEvacuateFollowersClosure evac(_g1h, &pss, _queues, &_terminator); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
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parents:
5963
diff
changeset
|
5038 evac.do_void(); |
500023bd0818
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parents:
5963
diff
changeset
|
5039 double elapsed_ms = (os::elapsedTime()-start)*1000.0; |
500023bd0818
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parents:
5963
diff
changeset
|
5040 double term_ms = pss.term_time()*1000.0; |
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
5041 _g1h->g1_policy()->phase_times()->add_obj_copy_time(worker_id, elapsed_ms-term_ms); |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5042 _g1h->g1_policy()->phase_times()->record_termination(worker_id, term_ms, pss.term_attempts()); |
5986
500023bd0818
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parents:
5963
diff
changeset
|
5043 } |
500023bd0818
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parents:
5963
diff
changeset
|
5044 _g1h->g1_policy()->record_thread_age_table(pss.age_table()); |
500023bd0818
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parents:
5963
diff
changeset
|
5045 _g1h->update_surviving_young_words(pss.surviving_young_words()+1); |
500023bd0818
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parents:
5963
diff
changeset
|
5046 |
500023bd0818
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parents:
5963
diff
changeset
|
5047 if (ParallelGCVerbose) { |
500023bd0818
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johnc
parents:
5963
diff
changeset
|
5048 MutexLocker x(stats_lock()); |
500023bd0818
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parents:
5963
diff
changeset
|
5049 pss.print_termination_stats(worker_id); |
500023bd0818
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parents:
5963
diff
changeset
|
5050 } |
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5963
diff
changeset
|
5051 |
500023bd0818
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parents:
5963
diff
changeset
|
5052 assert(pss.refs()->is_empty(), "should be empty"); |
500023bd0818
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5963
diff
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|
5053 |
500023bd0818
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5963
diff
changeset
|
5054 // Close the inner scope so that the ResourceMark and HandleMark |
500023bd0818
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5963
diff
changeset
|
5055 // destructors are executed here and are included as part of the |
500023bd0818
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5963
diff
changeset
|
5056 // "GC Worker Time". |
342 | 5057 } |
5058 | |
1611 | 5059 double end_time_ms = os::elapsedTime() * 1000.0; |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
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6188
diff
changeset
|
5060 _g1h->g1_policy()->phase_times()->record_gc_worker_end_time(worker_id, end_time_ms); |
342 | 5061 } |
5062 }; | |
5063 | |
5064 // *** Common G1 Evacuation Stuff | |
5065 | |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
5066 // This method is run in a GC worker. |
8b10f48633dc
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1755
diff
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|
5067 |
342 | 5068 void |
5069 G1CollectedHeap:: | |
6725
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6964458: Reimplement class meta-data storage to use native memory
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|
5070 g1_process_strong_roots(bool is_scavenging, |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
5071 ScanningOption so, |
342 | 5072 OopClosure* scan_non_heap_roots, |
5073 OopsInHeapRegionClosure* scan_rs, | |
6725
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6964458: Reimplement class meta-data storage to use native memory
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|
5074 G1KlassScanClosure* scan_klasses, |
342 | 5075 int worker_i) { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
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diff
changeset
|
5076 |
6725
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|
5077 // First scan the strong roots |
342 | 5078 double ext_roots_start = os::elapsedTime(); |
5079 double closure_app_time_sec = 0.0; | |
5080 | |
5081 BufferingOopClosure buf_scan_non_heap_roots(scan_non_heap_roots); | |
5082 | |
12080 | 5083 assert(so & SO_CodeCache || scan_rs != NULL, "must scan code roots somehow"); |
5084 // Walk the code cache/strong code roots w/o buffering, because StarTask | |
5085 // cannot handle unaligned oop locations. | |
5086 CodeBlobToOopClosure eager_scan_code_roots(scan_non_heap_roots, true /* do_marking */); | |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5087 |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5088 process_strong_roots(false, // no scoping; this is parallel code |
6725
da91efe96a93
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diff
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|
5089 is_scavenging, so, |
342 | 5090 &buf_scan_non_heap_roots, |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5091 &eager_scan_code_roots, |
6725
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diff
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|
5092 scan_klasses |
da91efe96a93
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diff
changeset
|
5093 ); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
5094 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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3973
diff
changeset
|
5095 // Now the CM ref_processor roots. |
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
5096 if (!_process_strong_tasks->is_task_claimed(G1H_PS_refProcessor_oops_do)) { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5097 // We need to treat the discovered reference lists of the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5098 // concurrent mark ref processor as roots and keep entries |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5099 // (which are added by the marking threads) on them live |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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3973
diff
changeset
|
5100 // until they can be processed at the end of marking. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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3973
diff
changeset
|
5101 ref_processor_cm()->weak_oops_do(&buf_scan_non_heap_roots); |
3823
14a2fd14c0db
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3778
diff
changeset
|
5102 } |
14a2fd14c0db
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3778
diff
changeset
|
5103 |
14a2fd14c0db
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3778
diff
changeset
|
5104 // Finish up any enqueued closure apps (attributed as object copy time). |
342 | 5105 buf_scan_non_heap_roots.done(); |
6725
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|
5106 |
da91efe96a93
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changeset
|
5107 double obj_copy_time_sec = buf_scan_non_heap_roots.closure_app_seconds(); |
da91efe96a93
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|
5108 |
6219
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|
5109 g1_policy()->phase_times()->record_obj_copy_time(worker_i, obj_copy_time_sec * 1000.0); |
3823
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diff
changeset
|
5110 |
342 | 5111 double ext_root_time_ms = |
6628
bb3f6194fedb
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|
5112 ((os::elapsedTime() - ext_roots_start) - obj_copy_time_sec) * 1000.0; |
3823
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7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
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|
5113 |
6219
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5114 g1_policy()->phase_times()->record_ext_root_scan_time(worker_i, ext_root_time_ms); |
342 | 5115 |
4787
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5116 // During conc marking we have to filter the per-thread SATB buffers |
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5117 // to make sure we remove any oops into the CSet (which will show up |
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5118 // as implicitly live). |
6628
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5119 double satb_filtering_ms = 0.0; |
4787
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5120 if (!_process_strong_tasks->is_task_claimed(G1H_PS_filter_satb_buffers)) { |
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5121 if (mark_in_progress()) { |
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5122 double satb_filter_start = os::elapsedTime(); |
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|
5123 |
4787
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5124 JavaThread::satb_mark_queue_set().filter_thread_buffers(); |
6628
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5125 |
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5126 satb_filtering_ms = (os::elapsedTime() - satb_filter_start) * 1000.0; |
4787
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5127 } |
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|
5128 } |
6219
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5129 g1_policy()->phase_times()->record_satb_filtering_time(worker_i, satb_filtering_ms); |
342 | 5130 |
12080 | 5131 // If this is an initial mark pause, and we're not scanning |
5132 // the entire code cache, we need to mark the oops in the | |
5133 // strong code root lists for the regions that are not in | |
5134 // the collection set. | |
5135 // Note all threads participate in this set of root tasks. | |
5136 double mark_strong_code_roots_ms = 0.0; | |
5137 if (g1_policy()->during_initial_mark_pause() && !(so & SO_CodeCache)) { | |
5138 double mark_strong_roots_start = os::elapsedTime(); | |
5139 mark_strong_code_roots(worker_i); | |
5140 mark_strong_code_roots_ms = (os::elapsedTime() - mark_strong_roots_start) * 1000.0; | |
5141 } | |
5142 g1_policy()->phase_times()->record_strong_code_root_mark_time(worker_i, mark_strong_code_roots_ms); | |
5143 | |
342 | 5144 // Now scan the complement of the collection set. |
5145 if (scan_rs != NULL) { | |
12080 | 5146 g1_rem_set()->oops_into_collection_set_do(scan_rs, &eager_scan_code_roots, worker_i); |
342 | 5147 } |
5148 _process_strong_tasks->all_tasks_completed(); | |
5149 } | |
5150 | |
5151 void | |
10179
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5152 G1CollectedHeap::g1_process_weak_roots(OopClosure* root_closure) { |
989
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5153 CodeBlobToOopClosure roots_in_blobs(root_closure, /*do_marking=*/ false); |
10179
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5154 SharedHeap::process_weak_roots(root_closure, &roots_in_blobs); |
342 | 5155 } |
5156 | |
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5157 class G1StringSymbolTableUnlinkTask : public AbstractGangTask { |
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5158 private: |
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5159 BoolObjectClosure* _is_alive; |
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5160 int _initial_string_table_size; |
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5161 int _initial_symbol_table_size; |
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|
5162 |
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5163 bool _process_strings; |
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5164 int _strings_processed; |
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5165 int _strings_removed; |
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|
5166 |
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5167 bool _process_symbols; |
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5168 int _symbols_processed; |
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5169 int _symbols_removed; |
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5170 |
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5171 bool _do_in_parallel; |
17634
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5172 public: |
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5173 G1StringSymbolTableUnlinkTask(BoolObjectClosure* is_alive, bool process_strings, bool process_symbols) : |
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5174 AbstractGangTask("Par String/Symbol table unlink"), _is_alive(is_alive), |
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5175 _do_in_parallel(G1CollectedHeap::use_parallel_gc_threads()), |
17634
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5176 _process_strings(process_strings), _strings_processed(0), _strings_removed(0), |
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5177 _process_symbols(process_symbols), _symbols_processed(0), _symbols_removed(0) { |
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5178 |
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5179 _initial_string_table_size = StringTable::the_table()->table_size(); |
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5180 _initial_symbol_table_size = SymbolTable::the_table()->table_size(); |
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5181 if (process_strings) { |
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|
5182 StringTable::clear_parallel_claimed_index(); |
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|
5183 } |
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|
5184 if (process_symbols) { |
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|
5185 SymbolTable::clear_parallel_claimed_index(); |
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|
5186 } |
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|
5187 } |
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|
5188 |
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|
5189 ~G1StringSymbolTableUnlinkTask() { |
17652
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|
5190 guarantee(!_process_strings || !_do_in_parallel || StringTable::parallel_claimed_index() >= _initial_string_table_size, |
17634
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|
5191 err_msg("claim value "INT32_FORMAT" after unlink less than initial string table size "INT32_FORMAT, |
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changeset
|
5192 StringTable::parallel_claimed_index(), _initial_string_table_size)); |
17652
0eb64cfc0b76
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|
5193 guarantee(!_process_symbols || !_do_in_parallel || SymbolTable::parallel_claimed_index() >= _initial_symbol_table_size, |
17634
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|
5194 err_msg("claim value "INT32_FORMAT" after unlink less than initial symbol table size "INT32_FORMAT, |
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|
5195 SymbolTable::parallel_claimed_index(), _initial_symbol_table_size)); |
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|
5196 } |
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|
5197 |
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|
5198 void work(uint worker_id) { |
17652
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|
5199 if (_do_in_parallel) { |
17634
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|
5200 int strings_processed = 0; |
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|
5201 int strings_removed = 0; |
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|
5202 int symbols_processed = 0; |
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|
5203 int symbols_removed = 0; |
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|
5204 if (_process_strings) { |
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|
5205 StringTable::possibly_parallel_unlink(_is_alive, &strings_processed, &strings_removed); |
5a32d2a3cc1e
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|
5206 Atomic::add(strings_processed, &_strings_processed); |
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|
5207 Atomic::add(strings_removed, &_strings_removed); |
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|
5208 } |
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|
5209 if (_process_symbols) { |
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|
5210 SymbolTable::possibly_parallel_unlink(&symbols_processed, &symbols_removed); |
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|
5211 Atomic::add(symbols_processed, &_symbols_processed); |
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|
5212 Atomic::add(symbols_removed, &_symbols_removed); |
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|
5213 } |
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|
5214 } else { |
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|
5215 if (_process_strings) { |
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|
5216 StringTable::unlink(_is_alive, &_strings_processed, &_strings_removed); |
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|
5217 } |
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|
5218 if (_process_symbols) { |
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|
5219 SymbolTable::unlink(&_symbols_processed, &_symbols_removed); |
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|
5220 } |
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|
5221 } |
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|
5222 } |
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|
5223 |
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|
5224 size_t strings_processed() const { return (size_t)_strings_processed; } |
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|
5225 size_t strings_removed() const { return (size_t)_strings_removed; } |
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|
5226 |
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|
5227 size_t symbols_processed() const { return (size_t)_symbols_processed; } |
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5228 size_t symbols_removed() const { return (size_t)_symbols_removed; } |
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|
5229 }; |
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|
5230 |
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5231 void G1CollectedHeap::unlink_string_and_symbol_table(BoolObjectClosure* is_alive, |
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|
5232 bool process_strings, bool process_symbols) { |
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|
5233 uint n_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
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|
5234 _g1h->workers()->active_workers() : 1); |
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|
5235 |
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|
5236 G1StringSymbolTableUnlinkTask g1_unlink_task(is_alive, process_strings, process_symbols); |
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5237 if (G1CollectedHeap::use_parallel_gc_threads()) { |
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|
5238 set_par_threads(n_workers); |
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|
5239 workers()->run_task(&g1_unlink_task); |
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|
5240 set_par_threads(0); |
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|
5241 } else { |
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|
5242 g1_unlink_task.work(0); |
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|
5243 } |
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|
5244 if (G1TraceStringSymbolTableScrubbing) { |
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|
5245 gclog_or_tty->print_cr("Cleaned string and symbol table, " |
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|
5246 "strings: "SIZE_FORMAT" processed, "SIZE_FORMAT" removed, " |
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5247 "symbols: "SIZE_FORMAT" processed, "SIZE_FORMAT" removed", |
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5248 g1_unlink_task.strings_processed(), g1_unlink_task.strings_removed(), |
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changeset
|
5249 g1_unlink_task.symbols_processed(), g1_unlink_task.symbols_removed()); |
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8027476: Improve performance of Stringtable unlink
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|
5250 } |
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diff
changeset
|
5251 } |
5a32d2a3cc1e
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diff
changeset
|
5252 |
17756
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
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diff
changeset
|
5253 class RedirtyLoggedCardTableEntryFastClosure : public CardTableEntryClosure { |
a07bea31ef35
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tschatzl
parents:
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diff
changeset
|
5254 public: |
a07bea31ef35
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tschatzl
parents:
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diff
changeset
|
5255 bool do_card_ptr(jbyte* card_ptr, int worker_i) { |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
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parents:
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diff
changeset
|
5256 *card_ptr = CardTableModRefBS::dirty_card_val(); |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
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diff
changeset
|
5257 return true; |
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tschatzl
parents:
17755
diff
changeset
|
5258 } |
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tschatzl
parents:
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diff
changeset
|
5259 }; |
a07bea31ef35
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tschatzl
parents:
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diff
changeset
|
5260 |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
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diff
changeset
|
5261 void G1CollectedHeap::redirty_logged_cards() { |
a07bea31ef35
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tschatzl
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diff
changeset
|
5262 guarantee(G1DeferredRSUpdate, "Must only be called when using deferred RS updates."); |
a07bea31ef35
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diff
changeset
|
5263 double redirty_logged_cards_start = os::elapsedTime(); |
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tschatzl
parents:
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diff
changeset
|
5264 |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
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diff
changeset
|
5265 RedirtyLoggedCardTableEntryFastClosure redirty; |
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8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
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diff
changeset
|
5266 dirty_card_queue_set().set_closure(&redirty); |
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tschatzl
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diff
changeset
|
5267 dirty_card_queue_set().apply_closure_to_all_completed_buffers(); |
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tschatzl
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diff
changeset
|
5268 |
a07bea31ef35
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tschatzl
parents:
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diff
changeset
|
5269 DirtyCardQueueSet& dcq = JavaThread::dirty_card_queue_set(); |
a07bea31ef35
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tschatzl
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diff
changeset
|
5270 dcq.merge_bufferlists(&dirty_card_queue_set()); |
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tschatzl
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diff
changeset
|
5271 assert(dirty_card_queue_set().completed_buffers_num() == 0, "All should be consumed"); |
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diff
changeset
|
5272 |
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tschatzl
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diff
changeset
|
5273 g1_policy()->phase_times()->record_redirty_logged_cards_time_ms((os::elapsedTime() - redirty_logged_cards_start) * 1000.0); |
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diff
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|
5274 } |
a07bea31ef35
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tschatzl
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diff
changeset
|
5275 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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|
5276 // Weak Reference Processing support |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5277 |
4dfb2df418f2
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|
5278 // An always "is_alive" closure that is used to preserve referents. |
4dfb2df418f2
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|
5279 // If the object is non-null then it's alive. Used in the preservation |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5280 // of referent objects that are pointed to by reference objects |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5281 // discovered by the CM ref processor. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
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|
5282 class G1AlwaysAliveClosure: public BoolObjectClosure { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
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|
5283 G1CollectedHeap* _g1; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5284 public: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5285 G1AlwaysAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
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6484982: G1: process references during evacuation pauses
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diff
changeset
|
5286 bool do_object_b(oop p) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5287 if (p != NULL) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5288 return true; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5289 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5290 return false; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5291 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5292 }; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5293 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5294 bool G1STWIsAliveClosure::do_object_b(oop p) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5295 // An object is reachable if it is outside the collection set, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5296 // or is inside and copied. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5297 return !_g1->obj_in_cs(p) || p->is_forwarded(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5298 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5299 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5300 // Non Copying Keep Alive closure |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5301 class G1KeepAliveClosure: public OopClosure { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5302 G1CollectedHeap* _g1; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5303 public: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5304 G1KeepAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5305 void do_oop(narrowOop* p) { guarantee(false, "Not needed"); } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5306 void do_oop( oop* p) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5307 oop obj = *p; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5308 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5309 if (_g1->obj_in_cs(obj)) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5310 assert( obj->is_forwarded(), "invariant" ); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5311 *p = obj->forwardee(); |
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 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5314 }; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5315 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5316 // Copying Keep Alive closure - can be called from both |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5317 // serial and parallel code as long as different worker |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5318 // threads utilize different G1ParScanThreadState instances |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5319 // and different queues. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5320 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5321 class G1CopyingKeepAliveClosure: public OopClosure { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5322 G1CollectedHeap* _g1h; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5323 OopClosure* _copy_non_heap_obj_cl; |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5324 OopsInHeapRegionClosure* _copy_metadata_obj_cl; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5325 G1ParScanThreadState* _par_scan_state; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5326 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5327 public: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5328 G1CopyingKeepAliveClosure(G1CollectedHeap* g1h, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5329 OopClosure* non_heap_obj_cl, |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5330 OopsInHeapRegionClosure* metadata_obj_cl, |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5331 G1ParScanThreadState* pss): |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5332 _g1h(g1h), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5333 _copy_non_heap_obj_cl(non_heap_obj_cl), |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5334 _copy_metadata_obj_cl(metadata_obj_cl), |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5335 _par_scan_state(pss) |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5336 {} |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5337 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5338 virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5339 virtual void do_oop( oop* p) { do_oop_work(p); } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5340 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5341 template <class T> void do_oop_work(T* p) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5342 oop obj = oopDesc::load_decode_heap_oop(p); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5343 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5344 if (_g1h->obj_in_cs(obj)) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5345 // If the referent object has been forwarded (either copied |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5346 // to a new location or to itself in the event of an |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5347 // evacuation failure) then we need to update the reference |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5348 // field and, if both reference and referent are in the G1 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5349 // heap, update the RSet for the referent. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5350 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5351 // If the referent has not been forwarded then we have to keep |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5352 // it alive by policy. Therefore we have copy the referent. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5353 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5354 // If the reference field is in the G1 heap then we can push |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5355 // on the PSS queue. When the queue is drained (after each |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5356 // phase of reference processing) the object and it's followers |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5357 // will be copied, the reference field set to point to the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5358 // new location, and the RSet updated. Otherwise we need to |
6725
da91efe96a93
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coleenp
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6629
diff
changeset
|
5359 // use the the non-heap or metadata closures directly to copy |
10405 | 5360 // the referent object and update the pointer, while avoiding |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5361 // updating the RSet. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5362 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5363 if (_g1h->is_in_g1_reserved(p)) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5364 _par_scan_state->push_on_queue(p); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5365 } else { |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5366 assert(!ClassLoaderDataGraph::contains((address)p), |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5367 err_msg("Otherwise need to call _copy_metadata_obj_cl->do_oop(p) " |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5368 PTR_FORMAT, p)); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5369 _copy_non_heap_obj_cl->do_oop(p); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5370 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5371 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5372 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5373 }; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5374 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5375 // Serial drain queue closure. Called as the 'complete_gc' |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5376 // closure for each discovered list in some of the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5377 // reference processing phases. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5378 |
4dfb2df418f2
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5379 class G1STWDrainQueueClosure: public VoidClosure { |
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|
5380 protected: |
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|
5381 G1CollectedHeap* _g1h; |
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|
5382 G1ParScanThreadState* _par_scan_state; |
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|
5383 |
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|
5384 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } |
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changeset
|
5385 |
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diff
changeset
|
5386 public: |
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diff
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|
5387 G1STWDrainQueueClosure(G1CollectedHeap* g1h, G1ParScanThreadState* pss) : |
4dfb2df418f2
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|
5388 _g1h(g1h), |
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diff
changeset
|
5389 _par_scan_state(pss) |
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diff
changeset
|
5390 { } |
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diff
changeset
|
5391 |
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changeset
|
5392 void do_void() { |
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|
5393 G1ParScanThreadState* const pss = par_scan_state(); |
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|
5394 pss->trim_queue(); |
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diff
changeset
|
5395 } |
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|
5396 }; |
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diff
changeset
|
5397 |
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|
5398 // Parallel Reference Processing closures |
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changeset
|
5399 |
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|
5400 // Implementation of AbstractRefProcTaskExecutor for parallel reference |
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changeset
|
5401 // processing during G1 evacuation pauses. |
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changeset
|
5402 |
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|
5403 class G1STWRefProcTaskExecutor: public AbstractRefProcTaskExecutor { |
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|
5404 private: |
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|
5405 G1CollectedHeap* _g1h; |
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|
5406 RefToScanQueueSet* _queues; |
4095
bca17e38de00
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|
5407 FlexibleWorkGang* _workers; |
3979
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|
5408 int _active_workers; |
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|
5409 |
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|
5410 public: |
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|
5411 G1STWRefProcTaskExecutor(G1CollectedHeap* g1h, |
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|
5412 FlexibleWorkGang* workers, |
3979
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|
5413 RefToScanQueueSet *task_queues, |
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|
5414 int n_workers) : |
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changeset
|
5415 _g1h(g1h), |
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changeset
|
5416 _queues(task_queues), |
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changeset
|
5417 _workers(workers), |
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changeset
|
5418 _active_workers(n_workers) |
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|
5419 { |
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|
5420 assert(n_workers > 0, "shouldn't call this otherwise"); |
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|
5421 } |
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|
5422 |
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|
5423 // Executes the given task using concurrent marking worker threads. |
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changeset
|
5424 virtual void execute(ProcessTask& task); |
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diff
changeset
|
5425 virtual void execute(EnqueueTask& task); |
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|
5426 }; |
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diff
changeset
|
5427 |
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changeset
|
5428 // Gang task for possibly parallel reference processing |
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diff
changeset
|
5429 |
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|
5430 class G1STWRefProcTaskProxy: public AbstractGangTask { |
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|
5431 typedef AbstractRefProcTaskExecutor::ProcessTask ProcessTask; |
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|
5432 ProcessTask& _proc_task; |
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|
5433 G1CollectedHeap* _g1h; |
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diff
changeset
|
5434 RefToScanQueueSet *_task_queues; |
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|
5435 ParallelTaskTerminator* _terminator; |
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diff
changeset
|
5436 |
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diff
changeset
|
5437 public: |
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diff
changeset
|
5438 G1STWRefProcTaskProxy(ProcessTask& proc_task, |
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changeset
|
5439 G1CollectedHeap* g1h, |
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diff
changeset
|
5440 RefToScanQueueSet *task_queues, |
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diff
changeset
|
5441 ParallelTaskTerminator* terminator) : |
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parents:
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diff
changeset
|
5442 AbstractGangTask("Process reference objects in parallel"), |
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parents:
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diff
changeset
|
5443 _proc_task(proc_task), |
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diff
changeset
|
5444 _g1h(g1h), |
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diff
changeset
|
5445 _task_queues(task_queues), |
4dfb2df418f2
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parents:
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diff
changeset
|
5446 _terminator(terminator) |
4dfb2df418f2
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parents:
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diff
changeset
|
5447 {} |
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diff
changeset
|
5448 |
4728
441e946dc1af
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jmasa
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4711
diff
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|
5449 virtual void work(uint worker_id) { |
3979
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parents:
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diff
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|
5450 // The reference processing task executed by a single worker. |
4dfb2df418f2
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parents:
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diff
changeset
|
5451 ResourceMark rm; |
4dfb2df418f2
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parents:
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diff
changeset
|
5452 HandleMark hm; |
4dfb2df418f2
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parents:
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diff
changeset
|
5453 |
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parents:
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diff
changeset
|
5454 G1STWIsAliveClosure is_alive(_g1h); |
4dfb2df418f2
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diff
changeset
|
5455 |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5456 G1ParScanThreadState pss(_g1h, worker_id, NULL); |
3979
4dfb2df418f2
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parents:
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diff
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|
5457 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
5458 |
3979
4dfb2df418f2
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parents:
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diff
changeset
|
5459 pss.set_evac_failure_closure(&evac_failure_cl); |
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diff
changeset
|
5460 |
4dfb2df418f2
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parents:
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diff
changeset
|
5461 G1ParScanExtRootClosure only_copy_non_heap_cl(_g1h, &pss, NULL); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5462 G1ParScanMetadataClosure only_copy_metadata_cl(_g1h, &pss, NULL); |
3979
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parents:
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diff
changeset
|
5463 |
4dfb2df418f2
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parents:
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diff
changeset
|
5464 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5465 G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(_g1h, &pss, NULL); |
3979
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parents:
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diff
changeset
|
5466 |
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diff
changeset
|
5467 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
6725
da91efe96a93
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coleenp
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6629
diff
changeset
|
5468 OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
3979
4dfb2df418f2
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parents:
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diff
changeset
|
5469 |
4dfb2df418f2
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diff
changeset
|
5470 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
4dfb2df418f2
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parents:
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diff
changeset
|
5471 // We also need to mark copied objects. |
4dfb2df418f2
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parents:
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diff
changeset
|
5472 copy_non_heap_cl = ©_mark_non_heap_cl; |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5473 copy_metadata_cl = ©_mark_metadata_cl; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5474 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5475 |
4dfb2df418f2
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diff
changeset
|
5476 // Keep alive closure. |
6725
da91efe96a93
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coleenp
parents:
6629
diff
changeset
|
5477 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, copy_metadata_cl, &pss); |
3979
4dfb2df418f2
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parents:
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diff
changeset
|
5478 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5479 // Complete GC closure |
4dfb2df418f2
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parents:
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diff
changeset
|
5480 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _task_queues, _terminator); |
4dfb2df418f2
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diff
changeset
|
5481 |
4dfb2df418f2
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diff
changeset
|
5482 // Call the reference processing task's work routine. |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5483 _proc_task.work(worker_id, is_alive, keep_alive, drain_queue); |
3979
4dfb2df418f2
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diff
changeset
|
5484 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5485 // Note we cannot assert that the refs array is empty here as not all |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5486 // of the processing tasks (specifically phase2 - pp2_work) execute |
4dfb2df418f2
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diff
changeset
|
5487 // the complete_gc closure (which ordinarily would drain the queue) so |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5488 // the queue may not be empty. |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5489 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5490 }; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5491 |
4dfb2df418f2
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parents:
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diff
changeset
|
5492 // Driver routine for parallel reference processing. |
4dfb2df418f2
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parents:
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diff
changeset
|
5493 // Creates an instance of the ref processing gang |
4dfb2df418f2
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parents:
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diff
changeset
|
5494 // task and has the worker threads execute it. |
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parents:
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diff
changeset
|
5495 void G1STWRefProcTaskExecutor::execute(ProcessTask& proc_task) { |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5496 assert(_workers != NULL, "Need parallel worker threads."); |
4dfb2df418f2
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diff
changeset
|
5497 |
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diff
changeset
|
5498 ParallelTaskTerminator terminator(_active_workers, _queues); |
4dfb2df418f2
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diff
changeset
|
5499 G1STWRefProcTaskProxy proc_task_proxy(proc_task, _g1h, _queues, &terminator); |
4dfb2df418f2
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diff
changeset
|
5500 |
4dfb2df418f2
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diff
changeset
|
5501 _g1h->set_par_threads(_active_workers); |
4dfb2df418f2
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diff
changeset
|
5502 _workers->run_task(&proc_task_proxy); |
4dfb2df418f2
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diff
changeset
|
5503 _g1h->set_par_threads(0); |
4dfb2df418f2
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parents:
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diff
changeset
|
5504 } |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5505 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5506 // Gang task for parallel reference enqueueing. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5507 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5508 class G1STWRefEnqueueTaskProxy: public AbstractGangTask { |
4dfb2df418f2
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diff
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|
5509 typedef AbstractRefProcTaskExecutor::EnqueueTask EnqueueTask; |
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5510 EnqueueTask& _enq_task; |
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|
5511 |
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|
5512 public: |
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|
5513 G1STWRefEnqueueTaskProxy(EnqueueTask& enq_task) : |
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|
5514 AbstractGangTask("Enqueue reference objects in parallel"), |
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|
5515 _enq_task(enq_task) |
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|
5516 { } |
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|
5517 |
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|
5518 virtual void work(uint worker_id) { |
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|
5519 _enq_task.work(worker_id); |
3979
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|
5520 } |
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|
5521 }; |
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|
5522 |
10405 | 5523 // Driver routine for parallel reference enqueueing. |
3979
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|
5524 // Creates an instance of the ref enqueueing gang |
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|
5525 // task and has the worker threads execute it. |
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|
5526 |
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|
5527 void G1STWRefProcTaskExecutor::execute(EnqueueTask& enq_task) { |
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|
5528 assert(_workers != NULL, "Need parallel worker threads."); |
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|
5529 |
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|
5530 G1STWRefEnqueueTaskProxy enq_task_proxy(enq_task); |
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|
5531 |
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|
5532 _g1h->set_par_threads(_active_workers); |
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5533 _workers->run_task(&enq_task_proxy); |
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|
5534 _g1h->set_par_threads(0); |
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|
5535 } |
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|
5536 |
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|
5537 // End of weak reference support closures |
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|
5538 |
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5539 // Abstract task used to preserve (i.e. copy) any referent objects |
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5540 // that are in the collection set and are pointed to by reference |
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5541 // objects discovered by the CM ref processor. |
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|
5542 |
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|
5543 class G1ParPreserveCMReferentsTask: public AbstractGangTask { |
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|
5544 protected: |
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|
5545 G1CollectedHeap* _g1h; |
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|
5546 RefToScanQueueSet *_queues; |
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|
5547 ParallelTaskTerminator _terminator; |
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|
5548 uint _n_workers; |
3979
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|
5549 |
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|
5550 public: |
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|
5551 G1ParPreserveCMReferentsTask(G1CollectedHeap* g1h,int workers, RefToScanQueueSet *task_queues) : |
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|
5552 AbstractGangTask("ParPreserveCMReferents"), |
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|
5553 _g1h(g1h), |
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|
5554 _queues(task_queues), |
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diff
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|
5555 _terminator(workers, _queues), |
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changeset
|
5556 _n_workers(workers) |
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|
5557 { } |
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|
5558 |
4728
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|
5559 void work(uint worker_id) { |
3979
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|
5560 ResourceMark rm; |
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diff
changeset
|
5561 HandleMark hm; |
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|
5562 |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
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parents:
17688
diff
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|
5563 G1ParScanThreadState pss(_g1h, worker_id, NULL); |
3979
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|
5564 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
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parents:
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diff
changeset
|
5565 |
3979
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|
5566 pss.set_evac_failure_closure(&evac_failure_cl); |
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|
5567 |
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changeset
|
5568 assert(pss.refs()->is_empty(), "both queue and overflow should be empty"); |
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|
5569 |
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diff
changeset
|
5570 |
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|
5571 G1ParScanExtRootClosure only_copy_non_heap_cl(_g1h, &pss, NULL); |
6725
da91efe96a93
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coleenp
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diff
changeset
|
5572 G1ParScanMetadataClosure only_copy_metadata_cl(_g1h, &pss, NULL); |
3979
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changeset
|
5573 |
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diff
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|
5574 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
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|
5575 G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(_g1h, &pss, NULL); |
3979
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diff
changeset
|
5576 |
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diff
changeset
|
5577 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
6725
da91efe96a93
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coleenp
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diff
changeset
|
5578 OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
3979
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diff
changeset
|
5579 |
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diff
changeset
|
5580 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
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diff
changeset
|
5581 // We also need to mark copied objects. |
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diff
changeset
|
5582 copy_non_heap_cl = ©_mark_non_heap_cl; |
6725
da91efe96a93
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coleenp
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6629
diff
changeset
|
5583 copy_metadata_cl = ©_mark_metadata_cl; |
3979
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diff
changeset
|
5584 } |
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diff
changeset
|
5585 |
4dfb2df418f2
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diff
changeset
|
5586 // Is alive closure |
4dfb2df418f2
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diff
changeset
|
5587 G1AlwaysAliveClosure always_alive(_g1h); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5588 |
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diff
changeset
|
5589 // Copying keep alive closure. Applied to referent objects that need |
4dfb2df418f2
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diff
changeset
|
5590 // to be copied. |
6725
da91efe96a93
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coleenp
parents:
6629
diff
changeset
|
5591 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, copy_metadata_cl, &pss); |
3979
4dfb2df418f2
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diff
changeset
|
5592 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5593 ReferenceProcessor* rp = _g1h->ref_processor_cm(); |
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diff
changeset
|
5594 |
4728
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jmasa
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diff
changeset
|
5595 uint limit = ReferenceProcessor::number_of_subclasses_of_ref() * rp->max_num_q(); |
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7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5596 uint stride = MIN2(MAX2(_n_workers, 1U), limit); |
3979
4dfb2df418f2
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diff
changeset
|
5597 |
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6484982: G1: process references during evacuation pauses
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diff
changeset
|
5598 // limit is set using max_num_q() - which was set using ParallelGCThreads. |
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diff
changeset
|
5599 // So this must be true - but assert just in case someone decides to |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5600 // change the worker ids. |
4728
441e946dc1af
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jmasa
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4711
diff
changeset
|
5601 assert(0 <= worker_id && worker_id < limit, "sanity"); |
3979
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diff
changeset
|
5602 assert(!rp->discovery_is_atomic(), "check this code"); |
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diff
changeset
|
5603 |
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diff
changeset
|
5604 // Select discovered lists [i, i+stride, i+2*stride,...,limit) |
4728
441e946dc1af
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jmasa
parents:
4711
diff
changeset
|
5605 for (uint idx = worker_id; idx < limit; idx += stride) { |
4014
bf2d2b8b1726
7095243: Disambiguate ReferenceProcessor::_discoveredSoftRefs
johnc
parents:
4013
diff
changeset
|
5606 DiscoveredList& ref_list = rp->discovered_refs()[idx]; |
3979
4dfb2df418f2
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diff
changeset
|
5607 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5608 DiscoveredListIterator iter(ref_list, &keep_alive, &always_alive); |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5609 while (iter.has_next()) { |
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parents:
3973
diff
changeset
|
5610 // Since discovery is not atomic for the CM ref processor, we |
4dfb2df418f2
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diff
changeset
|
5611 // can see some null referent objects. |
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diff
changeset
|
5612 iter.load_ptrs(DEBUG_ONLY(true)); |
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diff
changeset
|
5613 oop ref = iter.obj(); |
4dfb2df418f2
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parents:
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diff
changeset
|
5614 |
4dfb2df418f2
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parents:
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diff
changeset
|
5615 // This will filter nulls. |
4dfb2df418f2
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diff
changeset
|
5616 if (iter.is_referent_alive()) { |
4dfb2df418f2
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diff
changeset
|
5617 iter.make_referent_alive(); |
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parents:
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diff
changeset
|
5618 } |
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diff
changeset
|
5619 iter.move_to_next(); |
4dfb2df418f2
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parents:
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diff
changeset
|
5620 } |
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diff
changeset
|
5621 } |
4dfb2df418f2
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diff
changeset
|
5622 |
4dfb2df418f2
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diff
changeset
|
5623 // Drain the queue - which may cause stealing |
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parents:
3973
diff
changeset
|
5624 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _queues, &_terminator); |
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diff
changeset
|
5625 drain_queue.do_void(); |
4dfb2df418f2
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parents:
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diff
changeset
|
5626 // Allocation buffers were retired at the end of G1ParEvacuateFollowersClosure |
4dfb2df418f2
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3973
diff
changeset
|
5627 assert(pss.refs()->is_empty(), "should be"); |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5628 } |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5629 }; |
4dfb2df418f2
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parents:
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diff
changeset
|
5630 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5631 // Weak Reference processing during an evacuation pause (part 1). |
6819 | 5632 void G1CollectedHeap::process_discovered_references(uint no_of_gc_workers) { |
3979
4dfb2df418f2
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parents:
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diff
changeset
|
5633 double ref_proc_start = os::elapsedTime(); |
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parents:
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diff
changeset
|
5634 |
4dfb2df418f2
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diff
changeset
|
5635 ReferenceProcessor* rp = _ref_processor_stw; |
4dfb2df418f2
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parents:
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diff
changeset
|
5636 assert(rp->discovery_enabled(), "should have been enabled"); |
4dfb2df418f2
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parents:
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diff
changeset
|
5637 |
4dfb2df418f2
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diff
changeset
|
5638 // Any reference objects, in the collection set, that were 'discovered' |
4dfb2df418f2
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parents:
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diff
changeset
|
5639 // by the CM ref processor should have already been copied (either by |
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|
5640 // applying the external root copy closure to the discovered lists, or |
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diff
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|
5641 // by following an RSet entry). |
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diff
changeset
|
5642 // |
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diff
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|
5643 // But some of the referents, that are in the collection set, that these |
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diff
changeset
|
5644 // reference objects point to may not have been copied: the STW ref |
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diff
changeset
|
5645 // processor would have seen that the reference object had already |
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diff
changeset
|
5646 // been 'discovered' and would have skipped discovering the reference, |
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diff
changeset
|
5647 // but would not have treated the reference object as a regular oop. |
10405 | 5648 // As a result the copy closure would not have been applied to the |
3979
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6484982: G1: process references during evacuation pauses
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diff
changeset
|
5649 // referent object. |
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diff
changeset
|
5650 // |
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diff
changeset
|
5651 // We need to explicitly copy these referent objects - the references |
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diff
changeset
|
5652 // will be processed at the end of remarking. |
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diff
changeset
|
5653 // |
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diff
changeset
|
5654 // We also need to do this copying before we process the reference |
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parents:
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diff
changeset
|
5655 // objects discovered by the STW ref processor in case one of these |
4dfb2df418f2
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diff
changeset
|
5656 // referents points to another object which is also referenced by an |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5657 // object discovered by the STW ref processor. |
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diff
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|
5658 |
4711 | 5659 assert(!G1CollectedHeap::use_parallel_gc_threads() || |
6819 | 5660 no_of_gc_workers == workers()->active_workers(), |
5661 "Need to reset active GC workers"); | |
5662 | |
5663 set_par_threads(no_of_gc_workers); | |
5664 G1ParPreserveCMReferentsTask keep_cm_referents(this, | |
5665 no_of_gc_workers, | |
5666 _task_queues); | |
3979
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diff
changeset
|
5667 |
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diff
changeset
|
5668 if (G1CollectedHeap::use_parallel_gc_threads()) { |
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diff
changeset
|
5669 workers()->run_task(&keep_cm_referents); |
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6484982: G1: process references during evacuation pauses
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diff
changeset
|
5670 } else { |
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parents:
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diff
changeset
|
5671 keep_cm_referents.work(0); |
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6484982: G1: process references during evacuation pauses
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diff
changeset
|
5672 } |
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diff
changeset
|
5673 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5674 set_par_threads(0); |
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diff
changeset
|
5675 |
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6484982: G1: process references during evacuation pauses
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diff
changeset
|
5676 // Closure to test whether a referent is alive. |
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6484982: G1: process references during evacuation pauses
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diff
changeset
|
5677 G1STWIsAliveClosure is_alive(this); |
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6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5678 |
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parents:
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diff
changeset
|
5679 // Even when parallel reference processing is enabled, the processing |
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parents:
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diff
changeset
|
5680 // of JNI refs is serial and performed serially by the current thread |
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diff
changeset
|
5681 // rather than by a worker. The following PSS will be used for processing |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5682 // JNI refs. |
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6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5683 |
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6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5684 // Use only a single queue for this PSS. |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5685 G1ParScanThreadState pss(this, 0, NULL); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5686 |
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6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5687 // We do not embed a reference processor in the copying/scanning |
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
5688 // closures while we're actually processing the discovered |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5689 // reference objects. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5690 G1ParScanHeapEvacFailureClosure evac_failure_cl(this, &pss, NULL); |
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
5691 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5692 pss.set_evac_failure_closure(&evac_failure_cl); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5693 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5694 assert(pss.refs()->is_empty(), "pre-condition"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5695 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5696 G1ParScanExtRootClosure only_copy_non_heap_cl(this, &pss, NULL); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5697 G1ParScanMetadataClosure only_copy_metadata_cl(this, &pss, NULL); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5698 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5699 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(this, &pss, NULL); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5700 G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(this, &pss, NULL); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5701 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5702 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5703 OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5704 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5705 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5706 // We also need to mark copied objects. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5707 copy_non_heap_cl = ©_mark_non_heap_cl; |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5708 copy_metadata_cl = ©_mark_metadata_cl; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5709 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5710 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5711 // Keep alive closure. |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5712 G1CopyingKeepAliveClosure keep_alive(this, copy_non_heap_cl, copy_metadata_cl, &pss); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5713 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5714 // Serial Complete GC closure |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5715 G1STWDrainQueueClosure drain_queue(this, &pss); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5716 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5717 // Setup the soft refs policy... |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5718 rp->setup_policy(false); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5719 |
10405 | 5720 ReferenceProcessorStats stats; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5721 if (!rp->processing_is_mt()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5722 // Serial reference processing... |
10405 | 5723 stats = rp->process_discovered_references(&is_alive, |
5724 &keep_alive, | |
5725 &drain_queue, | |
5726 NULL, | |
5727 _gc_timer_stw); | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5728 } else { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5729 // Parallel reference processing |
6819 | 5730 assert(rp->num_q() == no_of_gc_workers, "sanity"); |
5731 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
5732 | |
5733 G1STWRefProcTaskExecutor par_task_executor(this, workers(), _task_queues, no_of_gc_workers); | |
10405 | 5734 stats = rp->process_discovered_references(&is_alive, |
5735 &keep_alive, | |
5736 &drain_queue, | |
5737 &par_task_executor, | |
5738 _gc_timer_stw); | |
5739 } | |
5740 | |
5741 _gc_tracer_stw->report_gc_reference_stats(stats); | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5742 // We have completed copying any necessary live referent objects |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5743 // (that were not copied during the actual pause) so we can |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5744 // retire any active alloc buffers |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5745 pss.retire_alloc_buffers(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5746 assert(pss.refs()->is_empty(), "both queue and overflow should be empty"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5747 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5748 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
|
5749 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
|
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 // Weak Reference processing during an evacuation pause (part 2). |
6819 | 5753 void G1CollectedHeap::enqueue_discovered_references(uint no_of_gc_workers) { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5754 double ref_enq_start = os::elapsedTime(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5755 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5756 ReferenceProcessor* rp = _ref_processor_stw; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5757 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
|
5758 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5759 // Now enqueue any remaining on the discovered lists on to |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5760 // the pending list. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5761 if (!rp->processing_is_mt()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5762 // Serial reference processing... |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5763 rp->enqueue_discovered_references(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5764 } else { |
10405 | 5765 // Parallel reference enqueueing |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5766 |
6819 | 5767 assert(no_of_gc_workers == workers()->active_workers(), |
5768 "Need to reset active workers"); | |
5769 assert(rp->num_q() == no_of_gc_workers, "sanity"); | |
5770 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
5771 | |
5772 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
|
5773 rp->enqueue_discovered_references(&par_task_executor); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5774 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5775 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5776 rp->verify_no_references_recorded(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5777 assert(!rp->discovery_enabled(), "should have been disabled"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5778 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5779 // FIXME |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5780 // 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
|
5781 // Should we do that here also? We could, but it is a serial operation |
10405 | 5782 // and could significantly increase the pause time. |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5783 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5784 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
|
5785 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
|
5786 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5787 |
10405 | 5788 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
|
5789 _expand_heap_after_alloc_failure = true; |
10405 | 5790 _evacuation_failed = false; |
342 | 5791 |
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5792 // 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
|
5793 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
|
5794 |
342 | 5795 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
|
5796 |
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5797 // Disable the hot card cache. |
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5798 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
|
5799 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
|
5800 hot_card_cache->set_use_cache(false); |
889 | 5801 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5802 uint n_workers; |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5803 if (G1CollectedHeap::use_parallel_gc_threads()) { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5804 n_workers = |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5805 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5806 workers()->active_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5807 Threads::number_of_non_daemon_threads()); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5808 assert(UseDynamicNumberOfGCThreads || |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5809 n_workers == workers()->total_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5810 "If not dynamic should be using all the workers"); |
4711 | 5811 workers()->set_active_workers(n_workers); |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5812 set_par_threads(n_workers); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5813 } else { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5814 assert(n_par_threads() == 0, |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5815 "Should be the original non-parallel value"); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5816 n_workers = 1; |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5817 } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5818 |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5819 G1ParTask g1_par_task(this, _task_queues); |
342 | 5820 |
5821 init_for_evac_failure(NULL); | |
5822 | |
5823 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
|
5824 |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5825 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
|
5826 double start_par_time_sec = os::elapsedTime(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5827 double end_par_time_sec; |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5828 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5829 { |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5830 StrongRootsScope srs(this); |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5831 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5832 if (G1CollectedHeap::use_parallel_gc_threads()) { |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5833 // 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
|
5834 if (ParallelGCVerbose) G1ParScanThreadState::print_termination_stats_hdr(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5835 // These tasks use ShareHeap::_process_strong_tasks |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5836 assert(UseDynamicNumberOfGCThreads || |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5837 workers()->active_workers() == workers()->total_workers(), |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5838 "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
|
5839 workers()->run_task(&g1_par_task); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5840 } else { |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5841 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
|
5842 g1_par_task.work(0); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5843 } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5844 end_par_time_sec = os::elapsedTime(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5845 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5846 // Closing the inner scope will execute the destructor |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5847 // for the StrongRootsScope object. We record the current |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5848 // elapsed time before closing the scope so that time |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5849 // taken for the SRS destructor is NOT included in the |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5850 // reported parallel time. |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5851 } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5852 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5853 double par_time_ms = (end_par_time_sec - start_par_time_sec) * 1000.0; |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5854 g1_policy()->phase_times()->record_par_time(par_time_ms); |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5855 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5856 double code_root_fixup_time_ms = |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5857 (os::elapsedTime() - end_par_time_sec) * 1000.0; |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5858 g1_policy()->phase_times()->record_code_root_fixup_time(code_root_fixup_time_ms); |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5859 |
342 | 5860 set_par_threads(0); |
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5861 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5862 // Process any discovered reference objects - we have |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5863 // to do this _before_ we retire the GC alloc regions |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5864 // as we may have to copy some 'reachable' referent |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5865 // objects (and their reachable sub-graphs) that were |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5866 // not copied during the pause. |
6819 | 5867 process_discovered_references(n_workers); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5868 |
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5869 // Weak root processing. |
342 | 5870 { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5871 G1STWIsAliveClosure is_alive(this); |
342 | 5872 G1KeepAliveClosure keep_alive(this); |
5873 JNIHandles::weak_oops_do(&is_alive, &keep_alive); | |
5874 } | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5875 |
10405 | 5876 release_gc_alloc_regions(n_workers, evacuation_info); |
342 | 5877 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
|
5878 |
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5879 // 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
|
5880 // 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
|
5881 // 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
|
5882 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
|
5883 hot_card_cache->set_use_cache(true); |
342 | 5884 |
12080 | 5885 // Migrate the strong code roots attached to each region in |
5886 // the collection set. Ideally we would like to do this | |
5887 // after we have finished the scanning/evacuation of the | |
5888 // strong code roots for a particular heap region. | |
5889 migrate_strong_code_roots(); | |
5890 | |
17753
191174b49bec
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
17749
diff
changeset
|
5891 purge_code_root_memory(); |
191174b49bec
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
17749
diff
changeset
|
5892 |
12080 | 5893 if (g1_policy()->during_initial_mark_pause()) { |
5894 // Reset the claim values set during marking the strong code roots | |
5895 reset_heap_region_claim_values(); | |
5896 } | |
5897 | |
342 | 5898 finalize_for_evac_failure(); |
5899 | |
5900 if (evacuation_failed()) { | |
5901 remove_self_forwarding_pointers(); | |
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5902 |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5903 // Reset the G1EvacuationFailureALot counters and flags |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5904 // 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
|
5905 // evacuation failure occurs. |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5906 NOT_PRODUCT(reset_evacuation_should_fail();) |
342 | 5907 } |
5908 | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5909 // Enqueue any remaining references remaining on the STW |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5910 // reference processor's discovered lists. We need to do |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5911 // this after the card table is cleaned (and verified) as |
10405 | 5912 // the act of enqueueing entries on to the pending list |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5913 // will log these updates (and dirty their associated |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5914 // cards). We need these updates logged to update any |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5915 // RSets. |
6819 | 5916 enqueue_discovered_references(n_workers); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5917 |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5918 if (G1DeferredRSUpdate) { |
17756
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5919 redirty_logged_cards(); |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5920 } |
342 | 5921 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
5922 } | |
5923 | |
2152 | 5924 void G1CollectedHeap::free_region(HeapRegion* hr, |
5925 FreeRegionList* free_list, | |
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
5926 bool par, |
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
5927 bool locked) { |
2152 | 5928 assert(!hr->isHumongous(), "this is only for non-humongous regions"); |
5929 assert(!hr->is_empty(), "the region should not be empty"); | |
5930 assert(free_list != NULL, "pre-condition"); | |
5931 | |
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5932 // 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
|
5933 // 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
|
5934 // (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
|
5935 if (!hr->is_young()) { |
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5936 _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
|
5937 } |
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
5938 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
|
5939 free_list->add_ordered(hr); |
2152 | 5940 } |
5941 | |
5942 void G1CollectedHeap::free_humongous_region(HeapRegion* hr, | |
5943 FreeRegionList* free_list, | |
5944 bool par) { | |
5945 assert(hr->startsHumongous(), "this is only for starts humongous regions"); | |
5946 assert(free_list != NULL, "pre-condition"); | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5947 |
2152 | 5948 size_t hr_capacity = hr->capacity(); |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5949 // 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
|
5950 // otherwise the information will be gone. |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5951 uint last_index = hr->last_hc_index(); |
2152 | 5952 hr->set_notHumongous(); |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5953 free_region(hr, free_list, par); |
2152 | 5954 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
5955 uint i = hr->hrs_index() + 1; |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5956 while (i < last_index) { |
3766 | 5957 HeapRegion* curr_hr = region_at(i); |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5958 assert(curr_hr->continuesHumongous(), "invariant"); |
2152 | 5959 curr_hr->set_notHumongous(); |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5960 free_region(curr_hr, free_list, par); |
2152 | 5961 i += 1; |
5962 } | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5963 } |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5964 |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5965 void G1CollectedHeap::remove_from_old_sets(const HeapRegionSetCount& old_regions_removed, |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5966 const HeapRegionSetCount& humongous_regions_removed) { |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5967 if (old_regions_removed.length() > 0 || humongous_regions_removed.length() > 0) { |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5968 MutexLockerEx x(OldSets_lock, Mutex::_no_safepoint_check_flag); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5969 _old_set.bulk_remove(old_regions_removed); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5970 _humongous_set.bulk_remove(humongous_regions_removed); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5971 } |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5972 |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5973 } |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5974 |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5975 void G1CollectedHeap::prepend_to_freelist(FreeRegionList* list) { |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5976 assert(list != NULL, "list can't be null"); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5977 if (!list->is_empty()) { |
2152 | 5978 MutexLockerEx x(FreeList_lock, Mutex::_no_safepoint_check_flag); |
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
17759
diff
changeset
|
5979 _free_list.add_ordered(list); |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5980 } |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5981 } |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5982 |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5983 void G1CollectedHeap::decrement_summary_bytes(size_t bytes) { |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5984 assert(_summary_bytes_used >= bytes, |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5985 err_msg("invariant: _summary_bytes_used: "SIZE_FORMAT" should be >= bytes: "SIZE_FORMAT, |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5986 _summary_bytes_used, bytes)); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5987 _summary_bytes_used -= bytes; |
342 | 5988 } |
5989 | |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
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diff
changeset
|
5990 class G1ParCleanupCTTask : public AbstractGangTask { |
12343 | 5991 G1SATBCardTableModRefBS* _ct_bs; |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
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diff
changeset
|
5992 G1CollectedHeap* _g1h; |
940
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6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
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|
5993 HeapRegion* volatile _su_head; |
796
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6819065: G1: eliminate high serial card table clearing time
apetrusenko
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diff
changeset
|
5994 public: |
12343 | 5995 G1ParCleanupCTTask(G1SATBCardTableModRefBS* ct_bs, |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
5996 G1CollectedHeap* g1h) : |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5997 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
|
5998 _ct_bs(ct_bs), _g1h(g1h) { } |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
5999 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
6000 void work(uint worker_id) { |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6001 HeapRegion* r; |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
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diff
changeset
|
6002 while (r = _g1h->pop_dirty_cards_region()) { |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
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diff
changeset
|
6003 clear_cards(r); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6004 } |
940
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6841313: G1: dirty cards of survivor regions in parallel
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936
diff
changeset
|
6005 } |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
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diff
changeset
|
6006 |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6007 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
|
6008 // 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
|
6009 if (!r->is_survivor()) { |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6010 _ct_bs->clear(MemRegion(r->bottom(), r->end())); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
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diff
changeset
|
6011 } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6012 } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6013 }; |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
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diff
changeset
|
6014 |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6015 #ifndef PRODUCT |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6016 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
|
6017 G1CollectedHeap* _g1h; |
12343 | 6018 G1SATBCardTableModRefBS* _ct_bs; |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6019 public: |
12343 | 6020 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
|
6021 : _g1h(g1h), _ct_bs(ct_bs) { } |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6022 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
|
6023 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
|
6024 _g1h->verify_dirty_region(r); |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6025 } else { |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6026 _g1h->verify_not_dirty_region(r); |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6027 } |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6028 return false; |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6029 } |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6030 }; |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6031 |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6032 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
|
6033 // All of the region should be clean. |
12343 | 6034 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
|
6035 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
|
6036 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
|
6037 } |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6038 |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6039 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
|
6040 // 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
|
6041 // 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
|
6042 // 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
|
6043 // 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
|
6044 // 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
|
6045 // 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
|
6046 // is dirty. |
12343 | 6047 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
|
6048 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
|
6049 if (hr->is_young()) { |
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6050 ct_bs->verify_g1_young_region(mr); |
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6051 } else { |
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6052 ct_bs->verify_dirty_region(mr); |
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6053 } |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6054 } |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
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3293
diff
changeset
|
6055 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6056 void G1CollectedHeap::verify_dirty_young_list(HeapRegion* head) { |
12343 | 6057 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6058 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
|
6059 verify_dirty_region(hr); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6060 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6061 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6062 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6063 void G1CollectedHeap::verify_dirty_young_regions() { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6064 verify_dirty_young_list(_young_list->first_region()); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6065 } |
940
8624da129f0b
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apetrusenko
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936
diff
changeset
|
6066 #endif |
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936
diff
changeset
|
6067 |
342 | 6068 void G1CollectedHeap::cleanUpCardTable() { |
12343 | 6069 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
342 | 6070 double start = os::elapsedTime(); |
6071 | |
4023 | 6072 { |
6073 // Iterate over the dirty cards region list. | |
6074 G1ParCleanupCTTask cleanup_task(ct_bs, this); | |
6075 | |
4711 | 6076 if (G1CollectedHeap::use_parallel_gc_threads()) { |
6077 set_par_threads(); | |
4023 | 6078 workers()->run_task(&cleanup_task); |
6079 set_par_threads(0); | |
6080 } else { | |
6081 while (_dirty_cards_region_list) { | |
6082 HeapRegion* r = _dirty_cards_region_list; | |
6083 cleanup_task.clear_cards(r); | |
6084 _dirty_cards_region_list = r->get_next_dirty_cards_region(); | |
6085 if (_dirty_cards_region_list == r) { | |
6086 // The last region. | |
6087 _dirty_cards_region_list = NULL; | |
6088 } | |
6089 r->set_next_dirty_cards_region(NULL); | |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
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|
6090 } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
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794
diff
changeset
|
6091 } |
4023 | 6092 #ifndef PRODUCT |
6093 if (G1VerifyCTCleanup || VerifyAfterGC) { | |
6094 G1VerifyCardTableCleanup cleanup_verifier(this, ct_bs); | |
6095 heap_region_iterate(&cleanup_verifier); | |
6096 } | |
6097 #endif | |
940
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6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
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936
diff
changeset
|
6098 } |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6099 |
342 | 6100 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
|
6101 g1_policy()->phase_times()->record_clear_ct_time(elapsed * 1000.0); |
342 | 6102 } |
6103 | |
10405 | 6104 void G1CollectedHeap::free_collection_set(HeapRegion* cs_head, EvacuationInfo& evacuation_info) { |
2152 | 6105 size_t pre_used = 0; |
6106 FreeRegionList local_free_list("Local List for CSet Freeing"); | |
6107 | |
342 | 6108 double young_time_ms = 0.0; |
6109 double non_young_time_ms = 0.0; | |
6110 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6111 // 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
|
6112 // 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
|
6113 // 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
|
6114 _young_list->clear(); |
1316cec51b4d
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6115 |
342 | 6116 G1CollectorPolicy* policy = g1_policy(); |
6117 | |
6118 double start_sec = os::elapsedTime(); | |
6119 bool non_young = true; | |
6120 | |
6121 HeapRegion* cur = cs_head; | |
6122 int age_bound = -1; | |
6123 size_t rs_lengths = 0; | |
6124 | |
6125 while (cur != NULL) { | |
2361 | 6126 assert(!is_on_master_free_list(cur), "sanity"); |
342 | 6127 if (non_young) { |
6128 if (cur->is_young()) { | |
6129 double end_sec = os::elapsedTime(); | |
6130 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
6131 non_young_time_ms += elapsed_ms; | |
6132 | |
6133 start_sec = os::elapsedTime(); | |
6134 non_young = false; | |
6135 } | |
6136 } else { | |
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6137 if (!cur->is_young()) { |
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6138 double end_sec = os::elapsedTime(); |
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6139 double elapsed_ms = (end_sec - start_sec) * 1000.0; |
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6140 young_time_ms += elapsed_ms; |
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6141 |
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6142 start_sec = os::elapsedTime(); |
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6143 non_young = true; |
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6144 } |
342 | 6145 } |
6146 | |
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6147 rs_lengths += cur->rem_set()->occupied_locked(); |
342 | 6148 |
6149 HeapRegion* next = cur->next_in_collection_set(); | |
6150 assert(cur->in_collection_set(), "bad CS"); | |
6151 cur->set_next_in_collection_set(NULL); | |
6152 cur->set_in_collection_set(false); | |
6153 | |
6154 if (cur->is_young()) { | |
6155 int index = cur->young_index_in_cset(); | |
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6156 assert(index != -1, "invariant"); |
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6157 assert((uint) index < policy->young_cset_region_length(), "invariant"); |
342 | 6158 size_t words_survived = _surviving_young_words[index]; |
6159 cur->record_surv_words_in_group(words_survived); | |
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6160 |
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6161 // At this point the we have 'popped' cur from the collection set |
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6162 // (linked via next_in_collection_set()) but it is still in the |
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6163 // young list (linked via next_young_region()). Clear the |
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6164 // _next_young_region field. |
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6165 cur->set_next_young_region(NULL); |
342 | 6166 } else { |
6167 int index = cur->young_index_in_cset(); | |
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6168 assert(index == -1, "invariant"); |
342 | 6169 } |
6170 | |
6171 assert( (cur->is_young() && cur->young_index_in_cset() > -1) || | |
6172 (!cur->is_young() && cur->young_index_in_cset() == -1), | |
6173 "invariant" ); | |
6174 | |
6175 if (!cur->evacuation_failed()) { | |
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6176 MemRegion used_mr = cur->used_region(); |
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6177 |
342 | 6178 // And the region is empty. |
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6179 assert(!used_mr.is_empty(), "Should not have empty regions in a CS."); |
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6180 pre_used += cur->used(); |
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6181 free_region(cur, &local_free_list, false /* par */, true /* locked */); |
342 | 6182 } else { |
6183 cur->uninstall_surv_rate_group(); | |
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6184 if (cur->is_young()) { |
342 | 6185 cur->set_young_index_in_cset(-1); |
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6186 } |
342 | 6187 cur->set_not_young(); |
6188 cur->set_evacuation_failed(false); | |
4072 | 6189 // The region is now considered to be old. |
6190 _old_set.add(cur); | |
10405 | 6191 evacuation_info.increment_collectionset_used_after(cur->used()); |
342 | 6192 } |
6193 cur = next; | |
6194 } | |
6195 | |
10405 | 6196 evacuation_info.set_regions_freed(local_free_list.length()); |
342 | 6197 policy->record_max_rs_lengths(rs_lengths); |
6198 policy->cset_regions_freed(); | |
6199 | |
6200 double end_sec = os::elapsedTime(); | |
6201 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
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6202 |
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6203 if (non_young) { |
342 | 6204 non_young_time_ms += elapsed_ms; |
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6205 } else { |
342 | 6206 young_time_ms += elapsed_ms; |
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6207 } |
342 | 6208 |
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6209 prepend_to_freelist(&local_free_list); |
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6210 decrement_summary_bytes(pre_used); |
6219
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6211 policy->phase_times()->record_young_free_cset_time_ms(young_time_ms); |
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6212 policy->phase_times()->record_non_young_free_cset_time_ms(non_young_time_ms); |
342 | 6213 } |
6214 | |
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6215 // This routine is similar to the above but does not record |
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6216 // any policy statistics or update free lists; we are abandoning |
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6217 // the current incremental collection set in preparation of a |
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6218 // full collection. After the full GC we will start to build up |
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6219 // the incremental collection set again. |
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6220 // This is only called when we're doing a full collection |
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6221 // and is immediately followed by the tearing down of the young list. |
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6222 |
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6223 void G1CollectedHeap::abandon_collection_set(HeapRegion* cs_head) { |
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6224 HeapRegion* cur = cs_head; |
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6225 |
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6226 while (cur != NULL) { |
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6227 HeapRegion* next = cur->next_in_collection_set(); |
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6228 assert(cur->in_collection_set(), "bad CS"); |
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6229 cur->set_next_in_collection_set(NULL); |
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6230 cur->set_in_collection_set(false); |
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6231 cur->set_young_index_in_cset(-1); |
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6232 cur = next; |
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|
6233 } |
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6234 } |
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6235 |
2152 | 6236 void G1CollectedHeap::set_free_regions_coming() { |
6237 if (G1ConcRegionFreeingVerbose) { | |
6238 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
6239 "setting free regions coming"); | |
6240 } | |
6241 | |
6242 assert(!free_regions_coming(), "pre-condition"); | |
6243 _free_regions_coming = true; | |
342 | 6244 } |
6245 | |
2152 | 6246 void G1CollectedHeap::reset_free_regions_coming() { |
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6247 assert(free_regions_coming(), "pre-condition"); |
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6248 |
2152 | 6249 { |
6250 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
6251 _free_regions_coming = false; | |
6252 SecondaryFreeList_lock->notify_all(); | |
6253 } | |
6254 | |
6255 if (G1ConcRegionFreeingVerbose) { | |
6256 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
6257 "reset free regions coming"); | |
342 | 6258 } |
6259 } | |
6260 | |
2152 | 6261 void G1CollectedHeap::wait_while_free_regions_coming() { |
6262 // Most of the time we won't have to wait, so let's do a quick test | |
6263 // first before we take the lock. | |
6264 if (!free_regions_coming()) { | |
6265 return; | |
6266 } | |
6267 | |
6268 if (G1ConcRegionFreeingVerbose) { | |
6269 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
6270 "waiting for free regions"); | |
342 | 6271 } |
6272 | |
6273 { | |
2152 | 6274 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
6275 while (free_regions_coming()) { | |
6276 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
342 | 6277 } |
2152 | 6278 } |
6279 | |
6280 if (G1ConcRegionFreeingVerbose) { | |
6281 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
6282 "done waiting for free regions"); | |
6283 } | |
342 | 6284 } |
6285 | |
6286 void G1CollectedHeap::set_region_short_lived_locked(HeapRegion* hr) { | |
6287 assert(heap_lock_held_for_gc(), | |
6288 "the heap lock should already be held by or for this thread"); | |
6289 _young_list->push_region(hr); | |
6290 } | |
6291 | |
6292 class NoYoungRegionsClosure: public HeapRegionClosure { | |
6293 private: | |
6294 bool _success; | |
6295 public: | |
6296 NoYoungRegionsClosure() : _success(true) { } | |
6297 bool doHeapRegion(HeapRegion* r) { | |
6298 if (r->is_young()) { | |
6299 gclog_or_tty->print_cr("Region ["PTR_FORMAT", "PTR_FORMAT") tagged as young", | |
6300 r->bottom(), r->end()); | |
6301 _success = false; | |
6302 } | |
6303 return false; | |
6304 } | |
6305 bool success() { return _success; } | |
6306 }; | |
6307 | |
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6308 bool G1CollectedHeap::check_young_list_empty(bool check_heap, bool check_sample) { |
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6309 bool ret = _young_list->check_list_empty(check_sample); |
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6310 |
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6311 if (check_heap) { |
342 | 6312 NoYoungRegionsClosure closure; |
6313 heap_region_iterate(&closure); | |
6314 ret = ret && closure.success(); | |
6315 } | |
6316 | |
6317 return ret; | |
6318 } | |
6319 | |
4072 | 6320 class TearDownRegionSetsClosure : public HeapRegionClosure { |
6321 private: | |
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6322 HeapRegionSet *_old_set; |
2152 | 6323 |
342 | 6324 public: |
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6325 TearDownRegionSetsClosure(HeapRegionSet* old_set) : _old_set(old_set) { } |
2152 | 6326 |
342 | 6327 bool doHeapRegion(HeapRegion* r) { |
4072 | 6328 if (r->is_empty()) { |
6329 // We ignore empty regions, we'll empty the free list afterwards | |
6330 } else if (r->is_young()) { | |
6331 // We ignore young regions, we'll empty the young list afterwards | |
6332 } else if (r->isHumongous()) { | |
6333 // We ignore humongous regions, we're not tearing down the | |
6334 // humongous region set | |
342 | 6335 } else { |
4072 | 6336 // The rest should be old |
6337 _old_set->remove(r); | |
342 | 6338 } |
6339 return false; | |
6340 } | |
6341 | |
4072 | 6342 ~TearDownRegionSetsClosure() { |
6343 assert(_old_set->is_empty(), "post-condition"); | |
2152 | 6344 } |
342 | 6345 }; |
6346 | |
4072 | 6347 void G1CollectedHeap::tear_down_region_sets(bool free_list_only) { |
6348 assert_at_safepoint(true /* should_be_vm_thread */); | |
6349 | |
6350 if (!free_list_only) { | |
6351 TearDownRegionSetsClosure cl(&_old_set); | |
6352 heap_region_iterate(&cl); | |
6353 | |
6354 // Need to do this after the heap iteration to be able to | |
6355 // recognize the young regions and ignore them during the iteration. | |
6356 _young_list->empty_list(); | |
6357 } | |
6358 _free_list.remove_all(); | |
6359 } | |
6360 | |
6361 class RebuildRegionSetsClosure : public HeapRegionClosure { | |
6362 private: | |
6363 bool _free_list_only; | |
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6364 HeapRegionSet* _old_set; |
4072 | 6365 FreeRegionList* _free_list; |
6366 size_t _total_used; | |
6367 | |
6368 public: | |
6369 RebuildRegionSetsClosure(bool free_list_only, | |
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6370 HeapRegionSet* old_set, FreeRegionList* free_list) : |
4072 | 6371 _free_list_only(free_list_only), |
6372 _old_set(old_set), _free_list(free_list), _total_used(0) { | |
6373 assert(_free_list->is_empty(), "pre-condition"); | |
6374 if (!free_list_only) { | |
6375 assert(_old_set->is_empty(), "pre-condition"); | |
6376 } | |
6377 } | |
6378 | |
6379 bool doHeapRegion(HeapRegion* r) { | |
6380 if (r->continuesHumongous()) { | |
6381 return false; | |
6382 } | |
6383 | |
6384 if (r->is_empty()) { | |
6385 // Add free regions to the free list | |
6386 _free_list->add_as_tail(r); | |
6387 } else if (!_free_list_only) { | |
6388 assert(!r->is_young(), "we should not come across young regions"); | |
6389 | |
6390 if (r->isHumongous()) { | |
6391 // We ignore humongous regions, we left the humongous set unchanged | |
6392 } else { | |
6393 // The rest should be old, add them to the old set | |
6394 _old_set->add(r); | |
6395 } | |
6396 _total_used += r->used(); | |
6397 } | |
6398 | |
6399 return false; | |
6400 } | |
6401 | |
6402 size_t total_used() { | |
6403 return _total_used; | |
6404 } | |
6405 }; | |
6406 | |
6407 void G1CollectedHeap::rebuild_region_sets(bool free_list_only) { | |
6408 assert_at_safepoint(true /* should_be_vm_thread */); | |
6409 | |
6410 RebuildRegionSetsClosure cl(free_list_only, &_old_set, &_free_list); | |
6411 heap_region_iterate(&cl); | |
6412 | |
6413 if (!free_list_only) { | |
6414 _summary_bytes_used = cl.total_used(); | |
6415 } | |
6416 assert(_summary_bytes_used == recalculate_used(), | |
6417 err_msg("inconsistent _summary_bytes_used, " | |
6418 "value: "SIZE_FORMAT" recalculated: "SIZE_FORMAT, | |
6419 _summary_bytes_used, recalculate_used())); | |
342 | 6420 } |
6421 | |
6422 void G1CollectedHeap::set_refine_cte_cl_concurrency(bool concurrent) { | |
6423 _refine_cte_cl->set_concurrent(concurrent); | |
6424 } | |
6425 | |
6426 bool G1CollectedHeap::is_in_closed_subset(const void* p) const { | |
6427 HeapRegion* hr = heap_region_containing(p); | |
6428 if (hr == NULL) { | |
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6429 return false; |
342 | 6430 } else { |
6431 return hr->is_in(p); | |
6432 } | |
6433 } | |
2152 | 6434 |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6435 // Methods for the mutator alloc region |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6436 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6437 HeapRegion* G1CollectedHeap::new_mutator_alloc_region(size_t word_size, |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6438 bool force) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6439 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
|
6440 assert(!force || g1_policy()->can_expand_young_list(), |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6441 "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
|
6442 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
|
6443 if (force || !young_list_full) { |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6444 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
|
6445 false /* is_old */, |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6446 false /* do_expand */); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6447 if (new_alloc_region != NULL) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6448 set_region_short_lived_locked(new_alloc_region); |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6449 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Eden, young_list_full); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6450 return new_alloc_region; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6451 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6452 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6453 return NULL; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6454 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6455 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6456 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
|
6457 size_t allocated_bytes) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6458 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
|
6459 assert(alloc_region->is_young(), "all mutator alloc regions should be young"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6460 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6461 g1_policy()->add_region_to_incremental_cset_lhs(alloc_region); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6462 _summary_bytes_used += allocated_bytes; |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6463 _hr_printer.retire(alloc_region); |
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6464 // 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
|
6465 // 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
|
6466 // used space has been recored in _summary_bytes_used. |
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6467 g1mm()->update_eden_size(); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6468 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6469 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6470 HeapRegion* MutatorAllocRegion::allocate_new_region(size_t word_size, |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6471 bool force) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6472 return _g1h->new_mutator_alloc_region(word_size, force); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6473 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6474 |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6475 void G1CollectedHeap::set_par_threads() { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6476 // 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
|
6477 // in the workgroup. |
4711 | 6478 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
|
6479 uint n_workers = workers()->active_workers(); |
4711 | 6480 assert(UseDynamicNumberOfGCThreads || |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6481 n_workers == workers()->total_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6482 "Otherwise should be using the total number of workers"); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6483 if (n_workers == 0) { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6484 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
|
6485 n_workers = ParallelGCThreads; |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6486 workers()->set_active_workers(n_workers); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6487 } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6488 set_par_threads(n_workers); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6489 } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6490 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6491 void MutatorAllocRegion::retire_region(HeapRegion* alloc_region, |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6492 size_t allocated_bytes) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6493 _g1h->retire_mutator_alloc_region(alloc_region, allocated_bytes); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6494 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6495 |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6496 // 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
|
6497 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6498 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
|
6499 uint count, |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6500 GCAllocPurpose ap) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6501 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
|
6502 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6503 if (count < g1_policy()->max_regions(ap)) { |
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
17759
diff
changeset
|
6504 bool survivor = (ap == GCAllocForSurvived); |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6505 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
|
6506 !survivor, |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6507 true /* do_expand */); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6508 if (new_alloc_region != NULL) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6509 // 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
|
6510 // 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
|
6511 // for survivors too. |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6512 new_alloc_region->set_saved_mark(); |
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
17759
diff
changeset
|
6513 if (survivor) { |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6514 new_alloc_region->set_survivor(); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6515 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Survivor); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6516 } else { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6517 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Old); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6518 } |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
6519 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
|
6520 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
|
6521 return new_alloc_region; |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6522 } else { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6523 g1_policy()->note_alloc_region_limit_reached(ap); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6524 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6525 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6526 return NULL; |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6527 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6528 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6529 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
|
6530 size_t allocated_bytes, |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6531 GCAllocPurpose ap) { |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
6532 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
|
6533 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
|
6534 g1_policy()->record_bytes_copied_during_gc(allocated_bytes); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6535 if (ap == GCAllocForSurvived) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6536 young_list()->add_survivor_region(alloc_region); |
4072 | 6537 } else { |
6538 _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
|
6539 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6540 _hr_printer.retire(alloc_region); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6541 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6542 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6543 HeapRegion* SurvivorGCAllocRegion::allocate_new_region(size_t word_size, |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6544 bool force) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6545 assert(!force, "not supported for GC alloc regions"); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6546 return _g1h->new_gc_alloc_region(word_size, count(), GCAllocForSurvived); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6547 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6548 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6549 void SurvivorGCAllocRegion::retire_region(HeapRegion* alloc_region, |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6550 size_t allocated_bytes) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6551 _g1h->retire_gc_alloc_region(alloc_region, allocated_bytes, |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6552 GCAllocForSurvived); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6553 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6554 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6555 HeapRegion* OldGCAllocRegion::allocate_new_region(size_t word_size, |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6556 bool force) { |
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6557 assert(!force, "not supported for GC alloc regions"); |
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6558 return _g1h->new_gc_alloc_region(word_size, count(), GCAllocForTenured); |
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6559 } |
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6560 |
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6561 void OldGCAllocRegion::retire_region(HeapRegion* alloc_region, |
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6562 size_t allocated_bytes) { |
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6563 _g1h->retire_gc_alloc_region(alloc_region, allocated_bytes, |
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6564 GCAllocForTenured); |
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6565 } |
2433
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6566 // Heap region set verification |
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6567 |
2152 | 6568 class VerifyRegionListsClosure : public HeapRegionClosure { |
6569 private: | |
17736
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6570 HeapRegionSet* _old_set; |
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6571 HeapRegionSet* _humongous_set; |
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6572 FreeRegionList* _free_list; |
2152 | 6573 |
6574 public: | |
17736
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6575 HeapRegionSetCount _old_count; |
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6576 HeapRegionSetCount _humongous_count; |
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6577 HeapRegionSetCount _free_count; |
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6578 |
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6579 VerifyRegionListsClosure(HeapRegionSet* old_set, |
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6580 HeapRegionSet* humongous_set, |
2152 | 6581 FreeRegionList* free_list) : |
17736
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6582 _old_set(old_set), _humongous_set(humongous_set), _free_list(free_list), |
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6583 _old_count(), _humongous_count(), _free_count(){ } |
2152 | 6584 |
6585 bool doHeapRegion(HeapRegion* hr) { | |
6586 if (hr->continuesHumongous()) { | |
6587 return false; | |
6588 } | |
6589 | |
6590 if (hr->is_young()) { | |
6591 // TODO | |
6592 } else if (hr->startsHumongous()) { | |
17736
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6593 assert(hr->containing_set() == _humongous_set, err_msg("Heap region %u is starts humongous but not in humongous set.", hr->region_num())); |
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6594 _humongous_count.increment(1u, hr->capacity()); |
2152 | 6595 } else if (hr->is_empty()) { |
17736
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6596 assert(hr->containing_set() == _free_list, err_msg("Heap region %u is empty but not on the free list.", hr->region_num())); |
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6597 _free_count.increment(1u, hr->capacity()); |
4072 | 6598 } else { |
17736
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6599 assert(hr->containing_set() == _old_set, err_msg("Heap region %u is old but not in the old set.", hr->region_num())); |
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6600 _old_count.increment(1u, hr->capacity()); |
2152 | 6601 } |
6602 return false; | |
6603 } | |
17736
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6604 |
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6605 void verify_counts(HeapRegionSet* old_set, HeapRegionSet* humongous_set, FreeRegionList* free_list) { |
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6606 guarantee(old_set->length() == _old_count.length(), err_msg("Old set count mismatch. Expected %u, actual %u.", old_set->length(), _old_count.length())); |
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6607 guarantee(old_set->total_capacity_bytes() == _old_count.capacity(), err_msg("Old set capacity mismatch. Expected " SIZE_FORMAT ", actual " SIZE_FORMAT, |
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6608 old_set->total_capacity_bytes(), _old_count.capacity())); |
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6609 |
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6610 guarantee(humongous_set->length() == _humongous_count.length(), err_msg("Hum set count mismatch. Expected %u, actual %u.", humongous_set->length(), _humongous_count.length())); |
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6611 guarantee(humongous_set->total_capacity_bytes() == _humongous_count.capacity(), err_msg("Hum set capacity mismatch. Expected " SIZE_FORMAT ", actual " SIZE_FORMAT, |
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6612 humongous_set->total_capacity_bytes(), _humongous_count.capacity())); |
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6613 |
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6614 guarantee(free_list->length() == _free_count.length(), err_msg("Free list count mismatch. Expected %u, actual %u.", free_list->length(), _free_count.length())); |
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6615 guarantee(free_list->total_capacity_bytes() == _free_count.capacity(), err_msg("Free list capacity mismatch. Expected " SIZE_FORMAT ", actual " SIZE_FORMAT, |
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6616 free_list->total_capacity_bytes(), _free_count.capacity())); |
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6617 } |
2152 | 6618 }; |
6619 | |
6010
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6620 HeapRegion* G1CollectedHeap::new_heap_region(uint hrs_index, |
3766 | 6621 HeapWord* bottom) { |
6622 HeapWord* end = bottom + HeapRegion::GrainWords; | |
6623 MemRegion mr(bottom, end); | |
6624 assert(_g1_reserved.contains(mr), "invariant"); | |
6625 // This might return NULL if the allocation fails | |
6754
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6626 return new HeapRegion(hrs_index, _bot_shared, mr); |
3766 | 6627 } |
6628 | |
2152 | 6629 void G1CollectedHeap::verify_region_sets() { |
6630 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); | |
6631 | |
6632 // First, check the explicit lists. | |
17736
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6633 _free_list.verify_list(); |
2152 | 6634 { |
6635 // Given that a concurrent operation might be adding regions to | |
6636 // the secondary free list we have to take the lock before | |
6637 // verifying it. | |
6638 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
17736
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6639 _secondary_free_list.verify_list(); |
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6640 } |
2152 | 6641 |
6642 // If a concurrent region freeing operation is in progress it will | |
6643 // be difficult to correctly attributed any free regions we come | |
6644 // across to the correct free list given that they might belong to | |
6645 // one of several (free_list, secondary_free_list, any local lists, | |
6646 // etc.). So, if that's the case we will skip the rest of the | |
6647 // verification operation. Alternatively, waiting for the concurrent | |
6648 // operation to complete will have a non-trivial effect on the GC's | |
6649 // operation (no concurrent operation will last longer than the | |
6650 // interval between two calls to verification) and it might hide | |
6651 // any issues that we would like to catch during testing. | |
6652 if (free_regions_coming()) { | |
6653 return; | |
6654 } | |
6655 | |
2361 | 6656 // Make sure we append the secondary_free_list on the free_list so |
6657 // that all free regions we will come across can be safely | |
6658 // attributed to the free_list. | |
6659 append_secondary_free_list_if_not_empty_with_lock(); | |
2152 | 6660 |
6661 // Finally, make sure that the region accounting in the lists is | |
6662 // consistent with what we see in the heap. | |
6663 | |
4072 | 6664 VerifyRegionListsClosure cl(&_old_set, &_humongous_set, &_free_list); |
2152 | 6665 heap_region_iterate(&cl); |
17736
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6666 cl.verify_counts(&_old_set, &_humongous_set, &_free_list); |
342 | 6667 } |
12080 | 6668 |
6669 // Optimized nmethod scanning | |
6670 | |
6671 class RegisterNMethodOopClosure: public OopClosure { | |
6672 G1CollectedHeap* _g1h; | |
6673 nmethod* _nm; | |
6674 | |
6675 template <class T> void do_oop_work(T* p) { | |
6676 T heap_oop = oopDesc::load_heap_oop(p); | |
6677 if (!oopDesc::is_null(heap_oop)) { | |
6678 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
6679 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
13062
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|
6680 assert(!hr->continuesHumongous(), |
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6681 err_msg("trying to add code root "PTR_FORMAT" in continuation of humongous region "HR_FORMAT |
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6682 " starting at "HR_FORMAT, |
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6683 _nm, HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()))); |
12080 | 6684 |
6685 // HeapRegion::add_strong_code_root() avoids adding duplicate | |
6686 // entries but having duplicates is OK since we "mark" nmethods | |
6687 // as visited when we scan the strong code root lists during the GC. | |
6688 hr->add_strong_code_root(_nm); | |
13062
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6689 assert(hr->rem_set()->strong_code_roots_list_contains(_nm), |
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6690 err_msg("failed to add code root "PTR_FORMAT" to remembered set of region "HR_FORMAT, |
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|
6691 _nm, HR_FORMAT_PARAMS(hr))); |
12080 | 6692 } |
6693 } | |
6694 | |
6695 public: | |
6696 RegisterNMethodOopClosure(G1CollectedHeap* g1h, nmethod* nm) : | |
6697 _g1h(g1h), _nm(nm) {} | |
6698 | |
6699 void do_oop(oop* p) { do_oop_work(p); } | |
6700 void do_oop(narrowOop* p) { do_oop_work(p); } | |
6701 }; | |
6702 | |
6703 class UnregisterNMethodOopClosure: public OopClosure { | |
6704 G1CollectedHeap* _g1h; | |
6705 nmethod* _nm; | |
6706 | |
6707 template <class T> void do_oop_work(T* p) { | |
6708 T heap_oop = oopDesc::load_heap_oop(p); | |
6709 if (!oopDesc::is_null(heap_oop)) { | |
6710 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
6711 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
13062
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6712 assert(!hr->continuesHumongous(), |
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6713 err_msg("trying to remove code root "PTR_FORMAT" in continuation of humongous region "HR_FORMAT |
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|
6714 " starting at "HR_FORMAT, |
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|
6715 _nm, HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()))); |
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6716 |
12080 | 6717 hr->remove_strong_code_root(_nm); |
13062
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6718 assert(!hr->rem_set()->strong_code_roots_list_contains(_nm), |
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6719 err_msg("failed to remove code root "PTR_FORMAT" of region "HR_FORMAT, |
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|
6720 _nm, HR_FORMAT_PARAMS(hr))); |
12080 | 6721 } |
6722 } | |
6723 | |
6724 public: | |
6725 UnregisterNMethodOopClosure(G1CollectedHeap* g1h, nmethod* nm) : | |
6726 _g1h(g1h), _nm(nm) {} | |
6727 | |
6728 void do_oop(oop* p) { do_oop_work(p); } | |
6729 void do_oop(narrowOop* p) { do_oop_work(p); } | |
6730 }; | |
6731 | |
6732 void G1CollectedHeap::register_nmethod(nmethod* nm) { | |
6733 CollectedHeap::register_nmethod(nm); | |
6734 | |
6735 guarantee(nm != NULL, "sanity"); | |
6736 RegisterNMethodOopClosure reg_cl(this, nm); | |
6737 nm->oops_do(®_cl); | |
6738 } | |
6739 | |
6740 void G1CollectedHeap::unregister_nmethod(nmethod* nm) { | |
6741 CollectedHeap::unregister_nmethod(nm); | |
6742 | |
6743 guarantee(nm != NULL, "sanity"); | |
6744 UnregisterNMethodOopClosure reg_cl(this, nm); | |
6745 nm->oops_do(®_cl, true); | |
6746 } | |
6747 | |
6748 class MigrateCodeRootsHeapRegionClosure: public HeapRegionClosure { | |
6749 public: | |
6750 bool doHeapRegion(HeapRegion *hr) { | |
13062
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|
6751 assert(!hr->isHumongous(), |
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|
6752 err_msg("humongous region "HR_FORMAT" should not have been added to collection set", |
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|
6753 HR_FORMAT_PARAMS(hr))); |
12080 | 6754 hr->migrate_strong_code_roots(); |
6755 return false; | |
6756 } | |
6757 }; | |
6758 | |
6759 void G1CollectedHeap::migrate_strong_code_roots() { | |
6760 MigrateCodeRootsHeapRegionClosure cl; | |
6761 double migrate_start = os::elapsedTime(); | |
6762 collection_set_iterate(&cl); | |
6763 double migration_time_ms = (os::elapsedTime() - migrate_start) * 1000.0; | |
6764 g1_policy()->phase_times()->record_strong_code_root_migration_time(migration_time_ms); | |
6765 } | |
6766 | |
17753
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|
6767 void G1CollectedHeap::purge_code_root_memory() { |
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|
6768 double purge_start = os::elapsedTime(); |
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|
6769 G1CodeRootSet::purge_chunks(G1CodeRootsChunkCacheKeepPercent); |
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|
6770 double purge_time_ms = (os::elapsedTime() - purge_start) * 1000.0; |
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|
6771 g1_policy()->phase_times()->record_strong_code_root_purge_time(purge_time_ms); |
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|
6772 } |
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|
6773 |
12080 | 6774 // Mark all the code roots that point into regions *not* in the |
6775 // collection set. | |
6776 // | |
6777 // Note we do not want to use a "marking" CodeBlobToOopClosure while | |
6778 // walking the the code roots lists of regions not in the collection | |
6779 // set. Suppose we have an nmethod (M) that points to objects in two | |
6780 // separate regions - one in the collection set (R1) and one not (R2). | |
6781 // Using a "marking" CodeBlobToOopClosure here would result in "marking" | |
6782 // nmethod M when walking the code roots for R1. When we come to scan | |
6783 // the code roots for R2, we would see that M is already marked and it | |
6784 // would be skipped and the objects in R2 that are referenced from M | |
6785 // would not be evacuated. | |
6786 | |
6787 class MarkStrongCodeRootCodeBlobClosure: public CodeBlobClosure { | |
6788 | |
6789 class MarkStrongCodeRootOopClosure: public OopClosure { | |
6790 ConcurrentMark* _cm; | |
6791 HeapRegion* _hr; | |
6792 uint _worker_id; | |
6793 | |
6794 template <class T> void do_oop_work(T* p) { | |
6795 T heap_oop = oopDesc::load_heap_oop(p); | |
6796 if (!oopDesc::is_null(heap_oop)) { | |
6797 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
6798 // Only mark objects in the region (which is assumed | |
6799 // to be not in the collection set). | |
6800 if (_hr->is_in(obj)) { | |
6801 _cm->grayRoot(obj, (size_t) obj->size(), _worker_id); | |
6802 } | |
6803 } | |
6804 } | |
6805 | |
6806 public: | |
6807 MarkStrongCodeRootOopClosure(ConcurrentMark* cm, HeapRegion* hr, uint worker_id) : | |
6808 _cm(cm), _hr(hr), _worker_id(worker_id) { | |
6809 assert(!_hr->in_collection_set(), "sanity"); | |
6810 } | |
6811 | |
6812 void do_oop(narrowOop* p) { do_oop_work(p); } | |
6813 void do_oop(oop* p) { do_oop_work(p); } | |
6814 }; | |
6815 | |
6816 MarkStrongCodeRootOopClosure _oop_cl; | |
6817 | |
6818 public: | |
6819 MarkStrongCodeRootCodeBlobClosure(ConcurrentMark* cm, HeapRegion* hr, uint worker_id): | |
6820 _oop_cl(cm, hr, worker_id) {} | |
6821 | |
6822 void do_code_blob(CodeBlob* cb) { | |
6823 nmethod* nm = (cb == NULL) ? NULL : cb->as_nmethod_or_null(); | |
6824 if (nm != NULL) { | |
6825 nm->oops_do(&_oop_cl); | |
6826 } | |
6827 } | |
6828 }; | |
6829 | |
6830 class MarkStrongCodeRootsHRClosure: public HeapRegionClosure { | |
6831 G1CollectedHeap* _g1h; | |
6832 uint _worker_id; | |
6833 | |
6834 public: | |
6835 MarkStrongCodeRootsHRClosure(G1CollectedHeap* g1h, uint worker_id) : | |
6836 _g1h(g1h), _worker_id(worker_id) {} | |
6837 | |
6838 bool doHeapRegion(HeapRegion *hr) { | |
6839 HeapRegionRemSet* hrrs = hr->rem_set(); | |
13062
28674af341ac
8027756: assert(!hr->isHumongous()) failed: code root in humongous region?
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|
6840 if (hr->continuesHumongous()) { |
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6841 // Code roots should never be attached to a continuation of a humongous region |
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|
6842 assert(hrrs->strong_code_roots_list_length() == 0, |
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changeset
|
6843 err_msg("code roots should never be attached to continuations of humongous region "HR_FORMAT |
17753
191174b49bec
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changeset
|
6844 " starting at "HR_FORMAT", but has "SIZE_FORMAT, |
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|
6845 HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()), |
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|
6846 hrrs->strong_code_roots_list_length())); |
12080 | 6847 return false; |
6848 } | |
6849 | |
6850 if (hr->in_collection_set()) { | |
6851 // Don't mark code roots into regions in the collection set here. | |
6852 // They will be marked when we scan them. | |
6853 return false; | |
6854 } | |
6855 | |
6856 MarkStrongCodeRootCodeBlobClosure cb_cl(_g1h->concurrent_mark(), hr, _worker_id); | |
6857 hr->strong_code_roots_do(&cb_cl); | |
6858 return false; | |
6859 } | |
6860 }; | |
6861 | |
6862 void G1CollectedHeap::mark_strong_code_roots(uint worker_id) { | |
6863 MarkStrongCodeRootsHRClosure cl(this, worker_id); | |
12082
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brutisso
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12080
diff
changeset
|
6864 if (G1CollectedHeap::use_parallel_gc_threads()) { |
9720d338b1d5
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brutisso
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diff
changeset
|
6865 heap_region_par_iterate_chunked(&cl, |
9720d338b1d5
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brutisso
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12080
diff
changeset
|
6866 worker_id, |
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brutisso
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diff
changeset
|
6867 workers()->active_workers(), |
9720d338b1d5
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brutisso
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12080
diff
changeset
|
6868 HeapRegion::ParMarkRootClaimValue); |
9720d338b1d5
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brutisso
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12080
diff
changeset
|
6869 } else { |
9720d338b1d5
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brutisso
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12080
diff
changeset
|
6870 heap_region_iterate(&cl); |
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brutisso
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diff
changeset
|
6871 } |
12080 | 6872 } |
6873 | |
6874 class RebuildStrongCodeRootClosure: public CodeBlobClosure { | |
6875 G1CollectedHeap* _g1h; | |
6876 | |
6877 public: | |
6878 RebuildStrongCodeRootClosure(G1CollectedHeap* g1h) : | |
6879 _g1h(g1h) {} | |
6880 | |
6881 void do_code_blob(CodeBlob* cb) { | |
6882 nmethod* nm = (cb != NULL) ? cb->as_nmethod_or_null() : NULL; | |
6883 if (nm == NULL) { | |
6884 return; | |
6885 } | |
6886 | |
6887 if (ScavengeRootsInCode && nm->detect_scavenge_root_oops()) { | |
6888 _g1h->register_nmethod(nm); | |
6889 } | |
6890 } | |
6891 }; | |
6892 | |
6893 void G1CollectedHeap::rebuild_strong_code_roots() { | |
6894 RebuildStrongCodeRootClosure blob_cl(this); | |
6895 CodeCache::blobs_do(&blob_cl); | |
6896 } |