Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp @ 17948:e4d318eea75a
8040245: G1: VM hangs during shutdown
Summary: temporarily disable the shutdown of the concurrent GC threads introduced in JDK-8037112
Reviewed-by: brutisso, tschatzl, jmasa
author | pliden |
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date | Thu, 17 Apr 2014 18:47:15 +0200 |
parents | 1772223a25a2 |
children | 8e20ef014b08 |
rev | line source |
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342 | 1 /* |
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2 * Copyright (c) 2001, 2014, Oracle and/or its affiliates. All rights reserved. |
342 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
342 | 22 * |
23 */ | |
24 | |
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25 #if !defined(__clang_major__) && defined(__GNUC__) |
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26 #define ATTRIBUTE_PRINTF(x,y) // FIXME, formats are a mess. |
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27 #endif |
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28 |
1972 | 29 #include "precompiled.hpp" |
12080 | 30 #include "code/codeCache.hpp" |
1972 | 31 #include "code/icBuffer.hpp" |
32 #include "gc_implementation/g1/bufferingOopClosure.hpp" | |
33 #include "gc_implementation/g1/concurrentG1Refine.hpp" | |
34 #include "gc_implementation/g1/concurrentG1RefineThread.hpp" | |
35 #include "gc_implementation/g1/concurrentMarkThread.inline.hpp" | |
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36 #include "gc_implementation/g1/g1AllocRegion.inline.hpp" |
1972 | 37 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" |
38 #include "gc_implementation/g1/g1CollectorPolicy.hpp" | |
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39 #include "gc_implementation/g1/g1ErgoVerbose.hpp" |
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40 #include "gc_implementation/g1/g1EvacFailure.hpp" |
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41 #include "gc_implementation/g1/g1GCPhaseTimes.hpp" |
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42 #include "gc_implementation/g1/g1Log.hpp" |
1972 | 43 #include "gc_implementation/g1/g1MarkSweep.hpp" |
44 #include "gc_implementation/g1/g1OopClosures.inline.hpp" | |
45 #include "gc_implementation/g1/g1RemSet.inline.hpp" | |
17764 | 46 #include "gc_implementation/g1/g1StringDedup.hpp" |
10405 | 47 #include "gc_implementation/g1/g1YCTypes.hpp" |
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48 #include "gc_implementation/g1/heapRegion.inline.hpp" |
1972 | 49 #include "gc_implementation/g1/heapRegionRemSet.hpp" |
50 #include "gc_implementation/g1/heapRegionSeq.inline.hpp" | |
51 #include "gc_implementation/g1/vm_operations_g1.hpp" | |
10405 | 52 #include "gc_implementation/shared/gcHeapSummary.hpp" |
53 #include "gc_implementation/shared/gcTimer.hpp" | |
54 #include "gc_implementation/shared/gcTrace.hpp" | |
55 #include "gc_implementation/shared/gcTraceTime.hpp" | |
1972 | 56 #include "gc_implementation/shared/isGCActiveMark.hpp" |
57 #include "memory/gcLocker.inline.hpp" | |
58 #include "memory/generationSpec.hpp" | |
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59 #include "memory/iterator.hpp" |
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60 #include "memory/referenceProcessor.hpp" |
1972 | 61 #include "oops/oop.inline.hpp" |
62 #include "oops/oop.pcgc.inline.hpp" | |
63 #include "runtime/vmThread.hpp" | |
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64 #include "utilities/ticks.hpp" |
342 | 65 |
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66 size_t G1CollectedHeap::_humongous_object_threshold_in_words = 0; |
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67 |
342 | 68 // turn it on so that the contents of the young list (scan-only / |
69 // to-be-collected) are printed at "strategic" points before / during | |
70 // / after the collection --- this is useful for debugging | |
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71 #define YOUNG_LIST_VERBOSE 0 |
342 | 72 // CURRENT STATUS |
73 // This file is under construction. Search for "FIXME". | |
74 | |
75 // INVARIANTS/NOTES | |
76 // | |
77 // All allocation activity covered by the G1CollectedHeap interface is | |
1973 | 78 // serialized by acquiring the HeapLock. This happens in mem_allocate |
79 // and allocate_new_tlab, which are the "entry" points to the | |
80 // allocation code from the rest of the JVM. (Note that this does not | |
81 // apply to TLAB allocation, which is not part of this interface: it | |
82 // is done by clients of this interface.) | |
342 | 83 |
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84 // Notes on implementation of parallelism in different tasks. |
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85 // |
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86 // G1ParVerifyTask uses heap_region_par_iterate_chunked() for parallelism. |
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87 // The number of GC workers is passed to heap_region_par_iterate_chunked(). |
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88 // It does use run_task() which sets _n_workers in the task. |
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89 // G1ParTask executes g1_process_strong_roots() -> |
10405 | 90 // SharedHeap::process_strong_roots() which calls eventually to |
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91 // CardTableModRefBS::par_non_clean_card_iterate_work() which uses |
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92 // SequentialSubTasksDone. SharedHeap::process_strong_roots() also |
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93 // directly uses SubTasksDone (_process_strong_tasks field in SharedHeap). |
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94 // |
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95 |
342 | 96 // Local to this file. |
97 | |
98 class RefineCardTableEntryClosure: public CardTableEntryClosure { | |
99 SuspendibleThreadSet* _sts; | |
100 G1RemSet* _g1rs; | |
101 ConcurrentG1Refine* _cg1r; | |
102 bool _concurrent; | |
103 public: | |
104 RefineCardTableEntryClosure(SuspendibleThreadSet* sts, | |
105 G1RemSet* g1rs, | |
106 ConcurrentG1Refine* cg1r) : | |
107 _sts(sts), _g1rs(g1rs), _cg1r(cg1r), _concurrent(true) | |
108 {} | |
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109 bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
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110 bool oops_into_cset = _g1rs->refine_card(card_ptr, worker_i, false); |
1705 | 111 // This path is executed by the concurrent refine or mutator threads, |
112 // concurrently, and so we do not care if card_ptr contains references | |
113 // that point into the collection set. | |
114 assert(!oops_into_cset, "should be"); | |
115 | |
342 | 116 if (_concurrent && _sts->should_yield()) { |
117 // Caller will actually yield. | |
118 return false; | |
119 } | |
120 // Otherwise, we finished successfully; return true. | |
121 return true; | |
122 } | |
123 void set_concurrent(bool b) { _concurrent = b; } | |
124 }; | |
125 | |
126 | |
127 class ClearLoggedCardTableEntryClosure: public CardTableEntryClosure { | |
128 int _calls; | |
129 G1CollectedHeap* _g1h; | |
130 CardTableModRefBS* _ctbs; | |
131 int _histo[256]; | |
132 public: | |
133 ClearLoggedCardTableEntryClosure() : | |
12343 | 134 _calls(0), _g1h(G1CollectedHeap::heap()), _ctbs(_g1h->g1_barrier_set()) |
342 | 135 { |
136 for (int i = 0; i < 256; i++) _histo[i] = 0; | |
137 } | |
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138 bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
342 | 139 if (_g1h->is_in_reserved(_ctbs->addr_for(card_ptr))) { |
140 _calls++; | |
141 unsigned char* ujb = (unsigned char*)card_ptr; | |
142 int ind = (int)(*ujb); | |
143 _histo[ind]++; | |
144 *card_ptr = -1; | |
145 } | |
146 return true; | |
147 } | |
148 int calls() { return _calls; } | |
149 void print_histo() { | |
150 gclog_or_tty->print_cr("Card table value histogram:"); | |
151 for (int i = 0; i < 256; i++) { | |
152 if (_histo[i] != 0) { | |
153 gclog_or_tty->print_cr(" %d: %d", i, _histo[i]); | |
154 } | |
155 } | |
156 } | |
157 }; | |
158 | |
159 class RedirtyLoggedCardTableEntryClosure: public CardTableEntryClosure { | |
160 int _calls; | |
161 G1CollectedHeap* _g1h; | |
162 CardTableModRefBS* _ctbs; | |
163 public: | |
164 RedirtyLoggedCardTableEntryClosure() : | |
12343 | 165 _calls(0), _g1h(G1CollectedHeap::heap()), _ctbs(_g1h->g1_barrier_set()) {} |
166 | |
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167 bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
342 | 168 if (_g1h->is_in_reserved(_ctbs->addr_for(card_ptr))) { |
169 _calls++; | |
170 *card_ptr = 0; | |
171 } | |
172 return true; | |
173 } | |
174 int calls() { return _calls; } | |
175 }; | |
176 | |
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177 YoungList::YoungList(G1CollectedHeap* g1h) : |
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178 _g1h(g1h), _head(NULL), _length(0), _last_sampled_rs_lengths(0), |
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179 _survivor_head(NULL), _survivor_tail(NULL), _survivor_length(0) { |
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180 guarantee(check_list_empty(false), "just making sure..."); |
342 | 181 } |
182 | |
183 void YoungList::push_region(HeapRegion *hr) { | |
184 assert(!hr->is_young(), "should not already be young"); | |
185 assert(hr->get_next_young_region() == NULL, "cause it should!"); | |
186 | |
187 hr->set_next_young_region(_head); | |
188 _head = hr; | |
189 | |
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190 _g1h->g1_policy()->set_region_eden(hr, (int) _length); |
342 | 191 ++_length; |
192 } | |
193 | |
194 void YoungList::add_survivor_region(HeapRegion* hr) { | |
545 | 195 assert(hr->is_survivor(), "should be flagged as survivor region"); |
342 | 196 assert(hr->get_next_young_region() == NULL, "cause it should!"); |
197 | |
198 hr->set_next_young_region(_survivor_head); | |
199 if (_survivor_head == NULL) { | |
545 | 200 _survivor_tail = hr; |
342 | 201 } |
202 _survivor_head = hr; | |
203 ++_survivor_length; | |
204 } | |
205 | |
206 void YoungList::empty_list(HeapRegion* list) { | |
207 while (list != NULL) { | |
208 HeapRegion* next = list->get_next_young_region(); | |
209 list->set_next_young_region(NULL); | |
210 list->uninstall_surv_rate_group(); | |
211 list->set_not_young(); | |
212 list = next; | |
213 } | |
214 } | |
215 | |
216 void YoungList::empty_list() { | |
217 assert(check_list_well_formed(), "young list should be well formed"); | |
218 | |
219 empty_list(_head); | |
220 _head = NULL; | |
221 _length = 0; | |
222 | |
223 empty_list(_survivor_head); | |
224 _survivor_head = NULL; | |
545 | 225 _survivor_tail = NULL; |
342 | 226 _survivor_length = 0; |
227 | |
228 _last_sampled_rs_lengths = 0; | |
229 | |
230 assert(check_list_empty(false), "just making sure..."); | |
231 } | |
232 | |
233 bool YoungList::check_list_well_formed() { | |
234 bool ret = true; | |
235 | |
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236 uint length = 0; |
342 | 237 HeapRegion* curr = _head; |
238 HeapRegion* last = NULL; | |
239 while (curr != NULL) { | |
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240 if (!curr->is_young()) { |
342 | 241 gclog_or_tty->print_cr("### YOUNG REGION "PTR_FORMAT"-"PTR_FORMAT" " |
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242 "incorrectly tagged (y: %d, surv: %d)", |
342 | 243 curr->bottom(), curr->end(), |
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244 curr->is_young(), curr->is_survivor()); |
342 | 245 ret = false; |
246 } | |
247 ++length; | |
248 last = curr; | |
249 curr = curr->get_next_young_region(); | |
250 } | |
251 ret = ret && (length == _length); | |
252 | |
253 if (!ret) { | |
254 gclog_or_tty->print_cr("### YOUNG LIST seems not well formed!"); | |
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255 gclog_or_tty->print_cr("### list has %u entries, _length is %u", |
342 | 256 length, _length); |
257 } | |
258 | |
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259 return ret; |
342 | 260 } |
261 | |
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262 bool YoungList::check_list_empty(bool check_sample) { |
342 | 263 bool ret = true; |
264 | |
265 if (_length != 0) { | |
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266 gclog_or_tty->print_cr("### YOUNG LIST should have 0 length, not %u", |
342 | 267 _length); |
268 ret = false; | |
269 } | |
270 if (check_sample && _last_sampled_rs_lengths != 0) { | |
271 gclog_or_tty->print_cr("### YOUNG LIST has non-zero last sampled RS lengths"); | |
272 ret = false; | |
273 } | |
274 if (_head != NULL) { | |
275 gclog_or_tty->print_cr("### YOUNG LIST does not have a NULL head"); | |
276 ret = false; | |
277 } | |
278 if (!ret) { | |
279 gclog_or_tty->print_cr("### YOUNG LIST does not seem empty"); | |
280 } | |
281 | |
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282 return ret; |
342 | 283 } |
284 | |
285 void | |
286 YoungList::rs_length_sampling_init() { | |
287 _sampled_rs_lengths = 0; | |
288 _curr = _head; | |
289 } | |
290 | |
291 bool | |
292 YoungList::rs_length_sampling_more() { | |
293 return _curr != NULL; | |
294 } | |
295 | |
296 void | |
297 YoungList::rs_length_sampling_next() { | |
298 assert( _curr != NULL, "invariant" ); | |
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299 size_t rs_length = _curr->rem_set()->occupied(); |
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300 |
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301 _sampled_rs_lengths += rs_length; |
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302 |
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303 // The current region may not yet have been added to the |
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304 // incremental collection set (it gets added when it is |
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305 // retired as the current allocation region). |
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306 if (_curr->in_collection_set()) { |
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307 // Update the collection set policy information for this region |
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308 _g1h->g1_policy()->update_incremental_cset_info(_curr, rs_length); |
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309 } |
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310 |
342 | 311 _curr = _curr->get_next_young_region(); |
312 if (_curr == NULL) { | |
313 _last_sampled_rs_lengths = _sampled_rs_lengths; | |
314 // gclog_or_tty->print_cr("last sampled RS lengths = %d", _last_sampled_rs_lengths); | |
315 } | |
316 } | |
317 | |
318 void | |
319 YoungList::reset_auxilary_lists() { | |
320 guarantee( is_empty(), "young list should be empty" ); | |
321 assert(check_list_well_formed(), "young list should be well formed"); | |
322 | |
323 // Add survivor regions to SurvRateGroup. | |
324 _g1h->g1_policy()->note_start_adding_survivor_regions(); | |
545 | 325 _g1h->g1_policy()->finished_recalculating_age_indexes(true /* is_survivors */); |
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326 |
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327 int young_index_in_cset = 0; |
342 | 328 for (HeapRegion* curr = _survivor_head; |
329 curr != NULL; | |
330 curr = curr->get_next_young_region()) { | |
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331 _g1h->g1_policy()->set_region_survivor(curr, young_index_in_cset); |
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332 |
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333 // The region is a non-empty survivor so let's add it to |
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334 // the incremental collection set for the next evacuation |
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335 // pause. |
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336 _g1h->g1_policy()->add_region_to_incremental_cset_rhs(curr); |
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337 young_index_in_cset += 1; |
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338 } |
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339 assert((uint) young_index_in_cset == _survivor_length, "post-condition"); |
342 | 340 _g1h->g1_policy()->note_stop_adding_survivor_regions(); |
341 | |
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342 _head = _survivor_head; |
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343 _length = _survivor_length; |
342 | 344 if (_survivor_head != NULL) { |
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345 assert(_survivor_tail != NULL, "cause it shouldn't be"); |
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346 assert(_survivor_length > 0, "invariant"); |
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347 _survivor_tail->set_next_young_region(NULL); |
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348 } |
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349 |
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350 // Don't clear the survivor list handles until the start of |
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351 // the next evacuation pause - we need it in order to re-tag |
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352 // the survivor regions from this evacuation pause as 'young' |
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353 // at the start of the next. |
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354 |
545 | 355 _g1h->g1_policy()->finished_recalculating_age_indexes(false /* is_survivors */); |
342 | 356 |
357 assert(check_list_well_formed(), "young list should be well formed"); | |
358 } | |
359 | |
360 void YoungList::print() { | |
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361 HeapRegion* lists[] = {_head, _survivor_head}; |
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362 const char* names[] = {"YOUNG", "SURVIVOR"}; |
342 | 363 |
364 for (unsigned int list = 0; list < ARRAY_SIZE(lists); ++list) { | |
365 gclog_or_tty->print_cr("%s LIST CONTENTS", names[list]); | |
366 HeapRegion *curr = lists[list]; | |
367 if (curr == NULL) | |
368 gclog_or_tty->print_cr(" empty"); | |
369 while (curr != NULL) { | |
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370 gclog_or_tty->print_cr(" "HR_FORMAT", P: "PTR_FORMAT "N: "PTR_FORMAT", age: %4d", |
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371 HR_FORMAT_PARAMS(curr), |
342 | 372 curr->prev_top_at_mark_start(), |
373 curr->next_top_at_mark_start(), | |
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374 curr->age_in_surv_rate_group_cond()); |
342 | 375 curr = curr->get_next_young_region(); |
376 } | |
377 } | |
378 | |
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379 gclog_or_tty->cr(); |
342 | 380 } |
381 | |
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382 void G1CollectedHeap::push_dirty_cards_region(HeapRegion* hr) |
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383 { |
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384 // Claim the right to put the region on the dirty cards region list |
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385 // by installing a self pointer. |
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386 HeapRegion* next = hr->get_next_dirty_cards_region(); |
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387 if (next == NULL) { |
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388 HeapRegion* res = (HeapRegion*) |
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389 Atomic::cmpxchg_ptr(hr, hr->next_dirty_cards_region_addr(), |
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390 NULL); |
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391 if (res == NULL) { |
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392 HeapRegion* head; |
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393 do { |
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394 // Put the region to the dirty cards region list. |
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395 head = _dirty_cards_region_list; |
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396 next = (HeapRegion*) |
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397 Atomic::cmpxchg_ptr(hr, &_dirty_cards_region_list, head); |
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398 if (next == head) { |
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399 assert(hr->get_next_dirty_cards_region() == hr, |
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400 "hr->get_next_dirty_cards_region() != hr"); |
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401 if (next == NULL) { |
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402 // The last region in the list points to itself. |
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403 hr->set_next_dirty_cards_region(hr); |
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404 } else { |
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405 hr->set_next_dirty_cards_region(next); |
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406 } |
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407 } |
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408 } while (next != head); |
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409 } |
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410 } |
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411 } |
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412 |
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413 HeapRegion* G1CollectedHeap::pop_dirty_cards_region() |
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414 { |
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415 HeapRegion* head; |
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416 HeapRegion* hr; |
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417 do { |
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418 head = _dirty_cards_region_list; |
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419 if (head == NULL) { |
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420 return NULL; |
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421 } |
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422 HeapRegion* new_head = head->get_next_dirty_cards_region(); |
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423 if (head == new_head) { |
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424 // The last region. |
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425 new_head = NULL; |
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426 } |
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427 hr = (HeapRegion*)Atomic::cmpxchg_ptr(new_head, &_dirty_cards_region_list, |
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428 head); |
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429 } while (hr != head); |
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430 assert(hr != NULL, "invariant"); |
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431 hr->set_next_dirty_cards_region(NULL); |
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432 return hr; |
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433 } |
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434 |
342 | 435 void G1CollectedHeap::stop_conc_gc_threads() { |
794 | 436 _cg1r->stop(); |
342 | 437 _cmThread->stop(); |
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438 if (G1StringDedup::is_enabled()) { |
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439 G1StringDedup::stop(); |
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440 } |
342 | 441 } |
442 | |
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443 #ifdef ASSERT |
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444 // A region is added to the collection set as it is retired |
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445 // so an address p can point to a region which will be in the |
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446 // collection set but has not yet been retired. This method |
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447 // therefore is only accurate during a GC pause after all |
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448 // regions have been retired. It is used for debugging |
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449 // to check if an nmethod has references to objects that can |
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450 // be move during a partial collection. Though it can be |
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451 // inaccurate, it is sufficient for G1 because the conservative |
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452 // implementation of is_scavengable() for G1 will indicate that |
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453 // all nmethods must be scanned during a partial collection. |
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454 bool G1CollectedHeap::is_in_partial_collection(const void* p) { |
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455 HeapRegion* hr = heap_region_containing(p); |
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456 return hr != NULL && hr->in_collection_set(); |
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457 } |
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458 #endif |
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459 |
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460 // Returns true if the reference points to an object that |
10405 | 461 // can move in an incremental collection. |
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462 bool G1CollectedHeap::is_scavengable(const void* p) { |
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463 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
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464 G1CollectorPolicy* g1p = g1h->g1_policy(); |
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465 HeapRegion* hr = heap_region_containing(p); |
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466 if (hr == NULL) { |
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467 // null |
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468 assert(p == NULL, err_msg("Not NULL " PTR_FORMAT ,p)); |
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469 return false; |
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470 } else { |
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471 return !hr->isHumongous(); |
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472 } |
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473 } |
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474 |
342 | 475 void G1CollectedHeap::check_ct_logs_at_safepoint() { |
476 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
12343 | 477 CardTableModRefBS* ct_bs = g1_barrier_set(); |
342 | 478 |
479 // Count the dirty cards at the start. | |
480 CountNonCleanMemRegionClosure count1(this); | |
481 ct_bs->mod_card_iterate(&count1); | |
482 int orig_count = count1.n(); | |
483 | |
484 // First clear the logged cards. | |
485 ClearLoggedCardTableEntryClosure clear; | |
486 dcqs.set_closure(&clear); | |
487 dcqs.apply_closure_to_all_completed_buffers(); | |
488 dcqs.iterate_closure_all_threads(false); | |
489 clear.print_histo(); | |
490 | |
491 // Now ensure that there's no dirty cards. | |
492 CountNonCleanMemRegionClosure count2(this); | |
493 ct_bs->mod_card_iterate(&count2); | |
494 if (count2.n() != 0) { | |
495 gclog_or_tty->print_cr("Card table has %d entries; %d originally", | |
496 count2.n(), orig_count); | |
497 } | |
498 guarantee(count2.n() == 0, "Card table should be clean."); | |
499 | |
500 RedirtyLoggedCardTableEntryClosure redirty; | |
501 JavaThread::dirty_card_queue_set().set_closure(&redirty); | |
502 dcqs.apply_closure_to_all_completed_buffers(); | |
503 dcqs.iterate_closure_all_threads(false); | |
504 gclog_or_tty->print_cr("Log entries = %d, dirty cards = %d.", | |
505 clear.calls(), orig_count); | |
506 guarantee(redirty.calls() == clear.calls(), | |
507 "Or else mechanism is broken."); | |
508 | |
509 CountNonCleanMemRegionClosure count3(this); | |
510 ct_bs->mod_card_iterate(&count3); | |
511 if (count3.n() != orig_count) { | |
512 gclog_or_tty->print_cr("Should have restored them all: orig = %d, final = %d.", | |
513 orig_count, count3.n()); | |
514 guarantee(count3.n() >= orig_count, "Should have restored them all."); | |
515 } | |
516 | |
517 JavaThread::dirty_card_queue_set().set_closure(_refine_cte_cl); | |
518 } | |
519 | |
520 // Private class members. | |
521 | |
522 G1CollectedHeap* G1CollectedHeap::_g1h; | |
523 | |
524 // Private methods. | |
525 | |
2152 | 526 HeapRegion* |
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527 G1CollectedHeap::new_region_try_secondary_free_list(bool is_old) { |
2152 | 528 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
529 while (!_secondary_free_list.is_empty() || free_regions_coming()) { | |
530 if (!_secondary_free_list.is_empty()) { | |
531 if (G1ConcRegionFreeingVerbose) { | |
532 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
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533 "secondary_free_list has %u entries", |
2152 | 534 _secondary_free_list.length()); |
535 } | |
536 // It looks as if there are free regions available on the | |
537 // secondary_free_list. Let's move them to the free_list and try | |
538 // again to allocate from it. | |
539 append_secondary_free_list(); | |
540 | |
541 assert(!_free_list.is_empty(), "if the secondary_free_list was not " | |
542 "empty we should have moved at least one entry to the free_list"); | |
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543 HeapRegion* res = _free_list.remove_region(is_old); |
2152 | 544 if (G1ConcRegionFreeingVerbose) { |
545 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
546 "allocated "HR_FORMAT" from secondary_free_list", | |
547 HR_FORMAT_PARAMS(res)); | |
548 } | |
549 return res; | |
550 } | |
551 | |
10405 | 552 // Wait here until we get notified either when (a) there are no |
2152 | 553 // more free regions coming or (b) some regions have been moved on |
554 // the secondary_free_list. | |
555 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
556 } | |
557 | |
558 if (G1ConcRegionFreeingVerbose) { | |
559 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
560 "could not allocate from secondary_free_list"); | |
561 } | |
562 return NULL; | |
563 } | |
564 | |
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565 HeapRegion* G1CollectedHeap::new_region(size_t word_size, bool is_old, bool do_expand) { |
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566 assert(!isHumongous(word_size) || word_size <= HeapRegion::GrainWords, |
2152 | 567 "the only time we use this to allocate a humongous region is " |
568 "when we are allocating a single humongous region"); | |
569 | |
570 HeapRegion* res; | |
571 if (G1StressConcRegionFreeing) { | |
572 if (!_secondary_free_list.is_empty()) { | |
573 if (G1ConcRegionFreeingVerbose) { | |
574 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
575 "forced to look at the secondary_free_list"); | |
576 } | |
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577 res = new_region_try_secondary_free_list(is_old); |
2152 | 578 if (res != NULL) { |
579 return res; | |
580 } | |
581 } | |
582 } | |
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583 |
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584 res = _free_list.remove_region(is_old); |
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585 |
2152 | 586 if (res == NULL) { |
587 if (G1ConcRegionFreeingVerbose) { | |
588 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
589 "res == NULL, trying the secondary_free_list"); | |
590 } | |
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591 res = new_region_try_secondary_free_list(is_old); |
2152 | 592 } |
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593 if (res == NULL && do_expand && _expand_heap_after_alloc_failure) { |
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594 // Currently, only attempts to allocate GC alloc regions set |
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595 // do_expand to true. So, we should only reach here during a |
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596 // safepoint. If this assumption changes we might have to |
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597 // reconsider the use of _expand_heap_after_alloc_failure. |
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598 assert(SafepointSynchronize::is_at_safepoint(), "invariant"); |
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599 |
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600 ergo_verbose1(ErgoHeapSizing, |
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601 "attempt heap expansion", |
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602 ergo_format_reason("region allocation request failed") |
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603 ergo_format_byte("allocation request"), |
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604 word_size * HeapWordSize); |
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605 if (expand(word_size * HeapWordSize)) { |
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606 // Given that expand() succeeded in expanding the heap, and we |
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607 // always expand the heap by an amount aligned to the heap |
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608 // region size, the free list should in theory not be empty. |
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609 // In either case remove_region() will check for NULL. |
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610 res = _free_list.remove_region(is_old); |
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611 } else { |
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612 _expand_heap_after_alloc_failure = false; |
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613 } |
342 | 614 } |
615 return res; | |
616 } | |
617 | |
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618 uint G1CollectedHeap::humongous_obj_allocate_find_first(uint num_regions, |
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619 size_t word_size) { |
2361 | 620 assert(isHumongous(word_size), "word_size should be humongous"); |
621 assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); | |
622 | |
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623 uint first = G1_NULL_HRS_INDEX; |
2152 | 624 if (num_regions == 1) { |
625 // Only one region to allocate, no need to go through the slower | |
10405 | 626 // path. The caller will attempt the expansion if this fails, so |
2152 | 627 // let's not try to expand here too. |
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628 HeapRegion* hr = new_region(word_size, true /* is_old */, false /* do_expand */); |
2152 | 629 if (hr != NULL) { |
630 first = hr->hrs_index(); | |
631 } else { | |
3766 | 632 first = G1_NULL_HRS_INDEX; |
2152 | 633 } |
634 } else { | |
635 // We can't allocate humongous regions while cleanupComplete() is | |
636 // running, since some of the regions we find to be empty might not | |
637 // yet be added to the free list and it is not straightforward to | |
638 // know which list they are on so that we can remove them. Note | |
639 // that we only need to do this if we need to allocate more than | |
640 // one region to satisfy the current humongous allocation | |
641 // request. If we are only allocating one region we use the common | |
642 // region allocation code (see above). | |
643 wait_while_free_regions_coming(); | |
2361 | 644 append_secondary_free_list_if_not_empty_with_lock(); |
2152 | 645 |
646 if (free_regions() >= num_regions) { | |
3766 | 647 first = _hrs.find_contiguous(num_regions); |
648 if (first != G1_NULL_HRS_INDEX) { | |
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649 for (uint i = first; i < first + num_regions; ++i) { |
3766 | 650 HeapRegion* hr = region_at(i); |
2152 | 651 assert(hr->is_empty(), "sanity"); |
2361 | 652 assert(is_on_master_free_list(hr), "sanity"); |
2152 | 653 hr->set_pending_removal(true); |
654 } | |
655 _free_list.remove_all_pending(num_regions); | |
656 } | |
657 } | |
658 } | |
659 return first; | |
660 } | |
661 | |
2361 | 662 HeapWord* |
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663 G1CollectedHeap::humongous_obj_allocate_initialize_regions(uint first, |
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664 uint num_regions, |
2361 | 665 size_t word_size) { |
3766 | 666 assert(first != G1_NULL_HRS_INDEX, "pre-condition"); |
2361 | 667 assert(isHumongous(word_size), "word_size should be humongous"); |
668 assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); | |
669 | |
670 // Index of last region in the series + 1. | |
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671 uint last = first + num_regions; |
2361 | 672 |
673 // We need to initialize the region(s) we just discovered. This is | |
674 // a bit tricky given that it can happen concurrently with | |
675 // refinement threads refining cards on these regions and | |
676 // potentially wanting to refine the BOT as they are scanning | |
677 // those cards (this can happen shortly after a cleanup; see CR | |
678 // 6991377). So we have to set up the region(s) carefully and in | |
679 // a specific order. | |
680 | |
681 // The word size sum of all the regions we will allocate. | |
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682 size_t word_size_sum = (size_t) num_regions * HeapRegion::GrainWords; |
2361 | 683 assert(word_size <= word_size_sum, "sanity"); |
684 | |
685 // This will be the "starts humongous" region. | |
3766 | 686 HeapRegion* first_hr = region_at(first); |
2361 | 687 // The header of the new object will be placed at the bottom of |
688 // the first region. | |
689 HeapWord* new_obj = first_hr->bottom(); | |
690 // This will be the new end of the first region in the series that | |
10405 | 691 // should also match the end of the last region in the series. |
2361 | 692 HeapWord* new_end = new_obj + word_size_sum; |
693 // This will be the new top of the first region that will reflect | |
694 // this allocation. | |
695 HeapWord* new_top = new_obj + word_size; | |
696 | |
697 // First, we need to zero the header of the space that we will be | |
698 // allocating. When we update top further down, some refinement | |
699 // threads might try to scan the region. By zeroing the header we | |
700 // ensure that any thread that will try to scan the region will | |
701 // come across the zero klass word and bail out. | |
702 // | |
703 // NOTE: It would not have been correct to have used | |
704 // CollectedHeap::fill_with_object() and make the space look like | |
705 // an int array. The thread that is doing the allocation will | |
706 // later update the object header to a potentially different array | |
707 // type and, for a very short period of time, the klass and length | |
708 // fields will be inconsistent. This could cause a refinement | |
709 // thread to calculate the object size incorrectly. | |
710 Copy::fill_to_words(new_obj, oopDesc::header_size(), 0); | |
711 | |
712 // We will set up the first region as "starts humongous". This | |
713 // will also update the BOT covering all the regions to reflect | |
714 // that there is a single object that starts at the bottom of the | |
715 // first region. | |
716 first_hr->set_startsHumongous(new_top, new_end); | |
717 | |
718 // Then, if there are any, we will set up the "continues | |
719 // humongous" regions. | |
720 HeapRegion* hr = NULL; | |
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721 for (uint i = first + 1; i < last; ++i) { |
3766 | 722 hr = region_at(i); |
2361 | 723 hr->set_continuesHumongous(first_hr); |
724 } | |
725 // If we have "continues humongous" regions (hr != NULL), then the | |
726 // end of the last one should match new_end. | |
727 assert(hr == NULL || hr->end() == new_end, "sanity"); | |
728 | |
729 // Up to this point no concurrent thread would have been able to | |
730 // do any scanning on any region in this series. All the top | |
731 // fields still point to bottom, so the intersection between | |
732 // [bottom,top] and [card_start,card_end] will be empty. Before we | |
733 // update the top fields, we'll do a storestore to make sure that | |
734 // no thread sees the update to top before the zeroing of the | |
735 // object header and the BOT initialization. | |
736 OrderAccess::storestore(); | |
737 | |
738 // Now that the BOT and the object header have been initialized, | |
739 // we can update top of the "starts humongous" region. | |
740 assert(first_hr->bottom() < new_top && new_top <= first_hr->end(), | |
741 "new_top should be in this region"); | |
742 first_hr->set_top(new_top); | |
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743 if (_hr_printer.is_active()) { |
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744 HeapWord* bottom = first_hr->bottom(); |
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745 HeapWord* end = first_hr->orig_end(); |
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746 if ((first + 1) == last) { |
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747 // the series has a single humongous region |
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748 _hr_printer.alloc(G1HRPrinter::SingleHumongous, first_hr, new_top); |
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749 } else { |
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750 // the series has more than one humongous regions |
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751 _hr_printer.alloc(G1HRPrinter::StartsHumongous, first_hr, end); |
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752 } |
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753 } |
2361 | 754 |
755 // Now, we will update the top fields of the "continues humongous" | |
756 // regions. The reason we need to do this is that, otherwise, | |
757 // these regions would look empty and this will confuse parts of | |
758 // G1. For example, the code that looks for a consecutive number | |
759 // of empty regions will consider them empty and try to | |
760 // re-allocate them. We can extend is_empty() to also include | |
761 // !continuesHumongous(), but it is easier to just update the top | |
762 // fields here. The way we set top for all regions (i.e., top == | |
763 // end for all regions but the last one, top == new_top for the | |
764 // last one) is actually used when we will free up the humongous | |
765 // region in free_humongous_region(). | |
766 hr = NULL; | |
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767 for (uint i = first + 1; i < last; ++i) { |
3766 | 768 hr = region_at(i); |
2361 | 769 if ((i + 1) == last) { |
770 // last continues humongous region | |
771 assert(hr->bottom() < new_top && new_top <= hr->end(), | |
772 "new_top should fall on this region"); | |
773 hr->set_top(new_top); | |
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774 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, new_top); |
2361 | 775 } else { |
776 // not last one | |
777 assert(new_top > hr->end(), "new_top should be above this region"); | |
778 hr->set_top(hr->end()); | |
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779 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, hr->end()); |
2361 | 780 } |
781 } | |
782 // If we have continues humongous regions (hr != NULL), then the | |
783 // end of the last one should match new_end and its top should | |
784 // match new_top. | |
785 assert(hr == NULL || | |
786 (hr->end() == new_end && hr->top() == new_top), "sanity"); | |
787 | |
788 assert(first_hr->used() == word_size * HeapWordSize, "invariant"); | |
789 _summary_bytes_used += first_hr->used(); | |
790 _humongous_set.add(first_hr); | |
791 | |
792 return new_obj; | |
793 } | |
794 | |
342 | 795 // If could fit into free regions w/o expansion, try. |
796 // Otherwise, if can expand, do so. | |
797 // Otherwise, if using ex regions might help, try with ex given back. | |
1973 | 798 HeapWord* G1CollectedHeap::humongous_obj_allocate(size_t word_size) { |
2152 | 799 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
800 | |
801 verify_region_sets_optional(); | |
342 | 802 |
6010
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803 size_t word_size_rounded = round_to(word_size, HeapRegion::GrainWords); |
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804 uint num_regions = (uint) (word_size_rounded / HeapRegion::GrainWords); |
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805 uint x_num = expansion_regions(); |
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806 uint fs = _hrs.free_suffix(); |
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807 uint first = humongous_obj_allocate_find_first(num_regions, word_size); |
3766 | 808 if (first == G1_NULL_HRS_INDEX) { |
2152 | 809 // The only thing we can do now is attempt expansion. |
6010
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810 if (fs + x_num >= num_regions) { |
2188
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811 // If the number of regions we're trying to allocate for this |
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812 // object is at most the number of regions in the free suffix, |
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813 // then the call to humongous_obj_allocate_find_first() above |
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814 // should have succeeded and we wouldn't be here. |
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815 // |
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816 // We should only be trying to expand when the free suffix is |
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817 // not sufficient for the object _and_ we have some expansion |
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818 // room available. |
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819 assert(num_regions > fs, "earlier allocation should have succeeded"); |
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820 |
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821 ergo_verbose1(ErgoHeapSizing, |
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822 "attempt heap expansion", |
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823 ergo_format_reason("humongous allocation request failed") |
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824 ergo_format_byte("allocation request"), |
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825 word_size * HeapWordSize); |
2188
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826 if (expand((num_regions - fs) * HeapRegion::GrainBytes)) { |
3766 | 827 // Even though the heap was expanded, it might not have |
828 // reached the desired size. So, we cannot assume that the | |
829 // allocation will succeed. | |
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830 first = humongous_obj_allocate_find_first(num_regions, word_size); |
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831 } |
2152 | 832 } |
833 } | |
834 | |
2361 | 835 HeapWord* result = NULL; |
3766 | 836 if (first != G1_NULL_HRS_INDEX) { |
2361 | 837 result = |
838 humongous_obj_allocate_initialize_regions(first, num_regions, word_size); | |
839 assert(result != NULL, "it should always return a valid result"); | |
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840 |
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841 // A successful humongous object allocation changes the used space |
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842 // information of the old generation so we need to recalculate the |
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843 // sizes and update the jstat counters here. |
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844 g1mm()->update_sizes(); |
2152 | 845 } |
846 | |
847 verify_region_sets_optional(); | |
2361 | 848 |
849 return result; | |
342 | 850 } |
851 | |
1973 | 852 HeapWord* G1CollectedHeap::allocate_new_tlab(size_t word_size) { |
853 assert_heap_not_locked_and_not_at_safepoint(); | |
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854 assert(!isHumongous(word_size), "we do not allow humongous TLABs"); |
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855 |
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856 unsigned int dummy_gc_count_before; |
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857 int dummy_gclocker_retry_count = 0; |
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858 return attempt_allocation(word_size, &dummy_gc_count_before, &dummy_gclocker_retry_count); |
342 | 859 } |
860 | |
861 HeapWord* | |
862 G1CollectedHeap::mem_allocate(size_t word_size, | |
1973 | 863 bool* gc_overhead_limit_was_exceeded) { |
864 assert_heap_not_locked_and_not_at_safepoint(); | |
342 | 865 |
10405 | 866 // Loop until the allocation is satisfied, or unsatisfied after GC. |
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867 for (int try_count = 1, gclocker_retry_count = 0; /* we'll return */; try_count += 1) { |
1973 | 868 unsigned int gc_count_before; |
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869 |
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870 HeapWord* result = NULL; |
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871 if (!isHumongous(word_size)) { |
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872 result = attempt_allocation(word_size, &gc_count_before, &gclocker_retry_count); |
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873 } else { |
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874 result = attempt_allocation_humongous(word_size, &gc_count_before, &gclocker_retry_count); |
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875 } |
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876 if (result != NULL) { |
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877 return result; |
342 | 878 } |
879 | |
880 // Create the garbage collection operation... | |
1973 | 881 VM_G1CollectForAllocation op(gc_count_before, word_size); |
342 | 882 // ...and get the VM thread to execute it. |
883 VMThread::execute(&op); | |
1973 | 884 |
885 if (op.prologue_succeeded() && op.pause_succeeded()) { | |
886 // If the operation was successful we'll return the result even | |
887 // if it is NULL. If the allocation attempt failed immediately | |
888 // after a Full GC, it's unlikely we'll be able to allocate now. | |
889 HeapWord* result = op.result(); | |
890 if (result != NULL && !isHumongous(word_size)) { | |
891 // Allocations that take place on VM operations do not do any | |
892 // card dirtying and we have to do it here. We only have to do | |
893 // this for non-humongous allocations, though. | |
894 dirty_young_block(result, word_size); | |
895 } | |
342 | 896 return result; |
1973 | 897 } else { |
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898 if (gclocker_retry_count > GCLockerRetryAllocationCount) { |
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899 return NULL; |
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900 } |
1973 | 901 assert(op.result() == NULL, |
902 "the result should be NULL if the VM op did not succeed"); | |
342 | 903 } |
904 | |
905 // Give a warning if we seem to be looping forever. | |
906 if ((QueuedAllocationWarningCount > 0) && | |
907 (try_count % QueuedAllocationWarningCount == 0)) { | |
1973 | 908 warning("G1CollectedHeap::mem_allocate retries %d times", try_count); |
342 | 909 } |
910 } | |
1973 | 911 |
912 ShouldNotReachHere(); | |
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913 return NULL; |
342 | 914 } |
915 | |
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916 HeapWord* G1CollectedHeap::attempt_allocation_slow(size_t word_size, |
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917 unsigned int *gc_count_before_ret, |
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918 int* gclocker_retry_count_ret) { |
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919 // Make sure you read the note in attempt_allocation_humongous(). |
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920 |
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921 assert_heap_not_locked_and_not_at_safepoint(); |
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922 assert(!isHumongous(word_size), "attempt_allocation_slow() should not " |
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923 "be called for humongous allocation requests"); |
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924 |
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925 // We should only get here after the first-level allocation attempt |
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926 // (attempt_allocation()) failed to allocate. |
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927 |
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928 // We will loop until a) we manage to successfully perform the |
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929 // allocation or b) we successfully schedule a collection which |
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930 // fails to perform the allocation. b) is the only case when we'll |
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931 // return NULL. |
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932 HeapWord* result = NULL; |
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933 for (int try_count = 1; /* we'll return */; try_count += 1) { |
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934 bool should_try_gc; |
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935 unsigned int gc_count_before; |
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936 |
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937 { |
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938 MutexLockerEx x(Heap_lock); |
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939 |
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940 result = _mutator_alloc_region.attempt_allocation_locked(word_size, |
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941 false /* bot_updates */); |
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942 if (result != NULL) { |
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943 return result; |
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944 } |
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945 |
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946 // If we reach here, attempt_allocation_locked() above failed to |
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947 // allocate a new region. So the mutator alloc region should be NULL. |
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948 assert(_mutator_alloc_region.get() == NULL, "only way to get here"); |
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949 |
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950 if (GC_locker::is_active_and_needs_gc()) { |
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951 if (g1_policy()->can_expand_young_list()) { |
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952 // No need for an ergo verbose message here, |
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953 // can_expand_young_list() does this when it returns true. |
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954 result = _mutator_alloc_region.attempt_allocation_force(word_size, |
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955 false /* bot_updates */); |
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956 if (result != NULL) { |
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957 return result; |
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958 } |
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959 } |
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960 should_try_gc = false; |
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961 } else { |
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962 // The GCLocker may not be active but the GCLocker initiated |
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963 // GC may not yet have been performed (GCLocker::needs_gc() |
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964 // returns true). In this case we do not try this GC and |
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965 // wait until the GCLocker initiated GC is performed, and |
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966 // then retry the allocation. |
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967 if (GC_locker::needs_gc()) { |
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968 should_try_gc = false; |
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969 } else { |
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970 // Read the GC count while still holding the Heap_lock. |
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971 gc_count_before = total_collections(); |
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972 should_try_gc = true; |
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973 } |
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974 } |
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975 } |
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976 |
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977 if (should_try_gc) { |
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978 bool succeeded; |
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979 result = do_collection_pause(word_size, gc_count_before, &succeeded, |
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980 GCCause::_g1_inc_collection_pause); |
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981 if (result != NULL) { |
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982 assert(succeeded, "only way to get back a non-NULL result"); |
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983 return result; |
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984 } |
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985 |
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986 if (succeeded) { |
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987 // If we get here we successfully scheduled a collection which |
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988 // failed to allocate. No point in trying to allocate |
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989 // further. We'll just return NULL. |
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990 MutexLockerEx x(Heap_lock); |
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991 *gc_count_before_ret = total_collections(); |
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992 return NULL; |
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993 } |
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994 } else { |
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995 if (*gclocker_retry_count_ret > GCLockerRetryAllocationCount) { |
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996 MutexLockerEx x(Heap_lock); |
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997 *gc_count_before_ret = total_collections(); |
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998 return NULL; |
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999 } |
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1000 // The GCLocker is either active or the GCLocker initiated |
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1001 // GC has not yet been performed. Stall until it is and |
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1002 // then retry the allocation. |
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1003 GC_locker::stall_until_clear(); |
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1004 (*gclocker_retry_count_ret) += 1; |
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1005 } |
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1006 |
10405 | 1007 // We can reach here if we were unsuccessful in scheduling a |
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1008 // collection (because another thread beat us to it) or if we were |
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1009 // stalled due to the GC locker. In either can we should retry the |
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1010 // allocation attempt in case another thread successfully |
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1011 // performed a collection and reclaimed enough space. We do the |
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1012 // first attempt (without holding the Heap_lock) here and the |
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1013 // follow-on attempt will be at the start of the next loop |
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1014 // iteration (after taking the Heap_lock). |
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1015 result = _mutator_alloc_region.attempt_allocation(word_size, |
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1016 false /* bot_updates */); |
5963
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1017 if (result != NULL) { |
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1018 return result; |
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1019 } |
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1020 |
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1021 // Give a warning if we seem to be looping forever. |
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1022 if ((QueuedAllocationWarningCount > 0) && |
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1023 (try_count % QueuedAllocationWarningCount == 0)) { |
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1024 warning("G1CollectedHeap::attempt_allocation_slow() " |
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1025 "retries %d times", try_count); |
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1026 } |
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1027 } |
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1028 |
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1029 ShouldNotReachHere(); |
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1030 return NULL; |
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1031 } |
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1032 |
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1033 HeapWord* G1CollectedHeap::attempt_allocation_humongous(size_t word_size, |
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1034 unsigned int * gc_count_before_ret, |
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1035 int* gclocker_retry_count_ret) { |
2433
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1036 // The structure of this method has a lot of similarities to |
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1037 // attempt_allocation_slow(). The reason these two were not merged |
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1038 // into a single one is that such a method would require several "if |
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1039 // allocation is not humongous do this, otherwise do that" |
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1040 // conditional paths which would obscure its flow. In fact, an early |
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1041 // version of this code did use a unified method which was harder to |
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1042 // follow and, as a result, it had subtle bugs that were hard to |
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1043 // track down. So keeping these two methods separate allows each to |
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1044 // be more readable. It will be good to keep these two in sync as |
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1045 // much as possible. |
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1046 |
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|
1047 assert_heap_not_locked_and_not_at_safepoint(); |
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1048 assert(isHumongous(word_size), "attempt_allocation_humongous() " |
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1049 "should only be called for humongous allocations"); |
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|
1050 |
4834
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1051 // Humongous objects can exhaust the heap quickly, so we should check if we |
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|
1052 // need to start a marking cycle at each humongous object allocation. We do |
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1053 // the check before we do the actual allocation. The reason for doing it |
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1054 // before the allocation is that we avoid having to keep track of the newly |
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|
1055 // allocated memory while we do a GC. |
4910
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|
1056 if (g1_policy()->need_to_start_conc_mark("concurrent humongous allocation", |
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1057 word_size)) { |
4834
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|
1058 collect(GCCause::_g1_humongous_allocation); |
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|
1059 } |
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|
1060 |
2433
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1061 // We will loop until a) we manage to successfully perform the |
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1062 // allocation or b) we successfully schedule a collection which |
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1063 // fails to perform the allocation. b) is the only case when we'll |
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1064 // return NULL. |
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|
1065 HeapWord* result = NULL; |
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|
1066 for (int try_count = 1; /* we'll return */; try_count += 1) { |
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|
1067 bool should_try_gc; |
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|
1068 unsigned int gc_count_before; |
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|
1069 |
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|
1070 { |
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|
1071 MutexLockerEx x(Heap_lock); |
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|
1072 |
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1073 // Given that humongous objects are not allocated in young |
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1074 // regions, we'll first try to do the allocation without doing a |
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1075 // collection hoping that there's enough space in the heap. |
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|
1076 result = humongous_obj_allocate(word_size); |
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|
1077 if (result != NULL) { |
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|
1078 return result; |
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|
1079 } |
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|
1080 |
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|
1081 if (GC_locker::is_active_and_needs_gc()) { |
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|
1082 should_try_gc = false; |
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|
1083 } else { |
6106
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1084 // The GCLocker may not be active but the GCLocker initiated |
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1085 // GC may not yet have been performed (GCLocker::needs_gc() |
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1086 // returns true). In this case we do not try this GC and |
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1087 // wait until the GCLocker initiated GC is performed, and |
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1088 // then retry the allocation. |
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|
1089 if (GC_locker::needs_gc()) { |
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|
1090 should_try_gc = false; |
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|
1091 } else { |
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|
1092 // Read the GC count while still holding the Heap_lock. |
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1093 gc_count_before = total_collections(); |
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1094 should_try_gc = true; |
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1095 } |
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1096 } |
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1097 } |
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1098 |
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1099 if (should_try_gc) { |
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1100 // If we failed to allocate the humongous object, we should try to |
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1101 // do a collection pause (if we're allowed) in case it reclaims |
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1102 // enough space for the allocation to succeed after the pause. |
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1103 |
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1104 bool succeeded; |
12113
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1105 result = do_collection_pause(word_size, gc_count_before, &succeeded, |
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1106 GCCause::_g1_humongous_allocation); |
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1107 if (result != NULL) { |
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1108 assert(succeeded, "only way to get back a non-NULL result"); |
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1109 return result; |
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1110 } |
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1111 |
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1112 if (succeeded) { |
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1113 // If we get here we successfully scheduled a collection which |
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1114 // failed to allocate. No point in trying to allocate |
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1115 // further. We'll just return NULL. |
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1116 MutexLockerEx x(Heap_lock); |
4910
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1117 *gc_count_before_ret = total_collections(); |
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1118 return NULL; |
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1119 } |
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1120 } else { |
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1121 if (*gclocker_retry_count_ret > GCLockerRetryAllocationCount) { |
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1122 MutexLockerEx x(Heap_lock); |
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1123 *gc_count_before_ret = total_collections(); |
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1124 return NULL; |
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1125 } |
6106
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1126 // The GCLocker is either active or the GCLocker initiated |
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1127 // GC has not yet been performed. Stall until it is and |
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1128 // then retry the allocation. |
2433
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1129 GC_locker::stall_until_clear(); |
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1130 (*gclocker_retry_count_ret) += 1; |
2433
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1131 } |
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1132 |
10405 | 1133 // We can reach here if we were unsuccessful in scheduling a |
2433
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1134 // collection (because another thread beat us to it) or if we were |
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1135 // stalled due to the GC locker. In either can we should retry the |
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1136 // allocation attempt in case another thread successfully |
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1137 // performed a collection and reclaimed enough space. Give a |
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1138 // warning if we seem to be looping forever. |
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1139 |
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1140 if ((QueuedAllocationWarningCount > 0) && |
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1141 (try_count % QueuedAllocationWarningCount == 0)) { |
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1142 warning("G1CollectedHeap::attempt_allocation_humongous() " |
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1143 "retries %d times", try_count); |
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1144 } |
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1145 } |
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1146 |
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1147 ShouldNotReachHere(); |
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1148 return NULL; |
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1149 } |
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1150 |
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1151 HeapWord* G1CollectedHeap::attempt_allocation_at_safepoint(size_t word_size, |
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1152 bool expect_null_mutator_alloc_region) { |
2152 | 1153 assert_at_safepoint(true /* should_be_vm_thread */); |
2433
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1154 assert(_mutator_alloc_region.get() == NULL || |
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1155 !expect_null_mutator_alloc_region, |
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1156 "the current alloc region was unexpectedly found to be non-NULL"); |
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1157 |
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1158 if (!isHumongous(word_size)) { |
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1159 return _mutator_alloc_region.attempt_allocation_locked(word_size, |
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1160 false /* bot_updates */); |
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1161 } else { |
4829
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|
1162 HeapWord* result = humongous_obj_allocate(word_size); |
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1163 if (result != NULL && g1_policy()->need_to_start_conc_mark("STW humongous allocation")) { |
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|
1164 g1_policy()->set_initiate_conc_mark_if_possible(); |
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|
1165 } |
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|
1166 return result; |
2433
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|
1167 } |
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|
1168 |
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|
1169 ShouldNotReachHere(); |
342 | 1170 } |
1171 | |
1172 class PostMCRemSetClearClosure: public HeapRegionClosure { | |
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1173 G1CollectedHeap* _g1h; |
342 | 1174 ModRefBarrierSet* _mr_bs; |
1175 public: | |
6254
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1176 PostMCRemSetClearClosure(G1CollectedHeap* g1h, ModRefBarrierSet* mr_bs) : |
12080 | 1177 _g1h(g1h), _mr_bs(mr_bs) {} |
1178 | |
342 | 1179 bool doHeapRegion(HeapRegion* r) { |
12080 | 1180 HeapRegionRemSet* hrrs = r->rem_set(); |
1181 | |
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1182 if (r->continuesHumongous()) { |
12080 | 1183 // We'll assert that the strong code root list and RSet is empty |
1184 assert(hrrs->strong_code_roots_list_length() == 0, "sanity"); | |
1185 assert(hrrs->occupied() == 0, "RSet should be empty"); | |
342 | 1186 return false; |
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1187 } |
12080 | 1188 |
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1189 _g1h->reset_gc_time_stamps(r); |
12080 | 1190 hrrs->clear(); |
342 | 1191 // You might think here that we could clear just the cards |
1192 // corresponding to the used region. But no: if we leave a dirty card | |
1193 // in a region we might allocate into, then it would prevent that card | |
1194 // from being enqueued, and cause it to be missed. | |
1195 // Re: the performance cost: we shouldn't be doing full GC anyway! | |
1196 _mr_bs->clear(MemRegion(r->bottom(), r->end())); | |
12080 | 1197 |
342 | 1198 return false; |
1199 } | |
1200 }; | |
1201 | |
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1202 void G1CollectedHeap::clear_rsets_post_compaction() { |
12343 | 1203 PostMCRemSetClearClosure rs_clear(this, g1_barrier_set()); |
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1204 heap_region_iterate(&rs_clear); |
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1205 } |
342 | 1206 |
626
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1207 class RebuildRSOutOfRegionClosure: public HeapRegionClosure { |
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1208 G1CollectedHeap* _g1h; |
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|
1209 UpdateRSOopClosure _cl; |
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|
1210 int _worker_i; |
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|
1211 public: |
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|
1212 RebuildRSOutOfRegionClosure(G1CollectedHeap* g1, int worker_i = 0) : |
1861 | 1213 _cl(g1->g1_rem_set(), worker_i), |
626
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1214 _worker_i(worker_i), |
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1215 _g1h(g1) |
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1216 { } |
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|
1217 |
626
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1218 bool doHeapRegion(HeapRegion* r) { |
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1219 if (!r->continuesHumongous()) { |
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|
1220 _cl.set_from(r); |
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|
1221 r->oop_iterate(&_cl); |
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|
1222 } |
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1223 return false; |
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|
1224 } |
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|
1225 }; |
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|
1226 |
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1227 class ParRebuildRSTask: public AbstractGangTask { |
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|
1228 G1CollectedHeap* _g1; |
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1229 public: |
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|
1230 ParRebuildRSTask(G1CollectedHeap* g1) |
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1231 : AbstractGangTask("ParRebuildRSTask"), |
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1232 _g1(g1) |
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1233 { } |
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1234 |
4728
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|
1235 void work(uint worker_id) { |
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1236 RebuildRSOutOfRegionClosure rebuild_rs(_g1, worker_id); |
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1237 _g1->heap_region_par_iterate_chunked(&rebuild_rs, worker_id, |
4095
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|
1238 _g1->workers()->active_workers(), |
626
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|
1239 HeapRegion::RebuildRSClaimValue); |
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1240 } |
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1241 }; |
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1242 |
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1243 class PostCompactionPrinterClosure: public HeapRegionClosure { |
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1244 private: |
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1245 G1HRPrinter* _hr_printer; |
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1246 public: |
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1247 bool doHeapRegion(HeapRegion* hr) { |
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1248 assert(!hr->is_young(), "not expecting to find young regions"); |
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1249 // We only generate output for non-empty regions. |
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1250 if (!hr->is_empty()) { |
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1251 if (!hr->isHumongous()) { |
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1252 _hr_printer->post_compaction(hr, G1HRPrinter::Old); |
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1253 } else if (hr->startsHumongous()) { |
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1254 if (hr->region_num() == 1) { |
3778
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1255 // single humongous region |
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1256 _hr_printer->post_compaction(hr, G1HRPrinter::SingleHumongous); |
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1257 } else { |
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1258 _hr_printer->post_compaction(hr, G1HRPrinter::StartsHumongous); |
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1259 } |
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1260 } else { |
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1261 assert(hr->continuesHumongous(), "only way to get here"); |
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1262 _hr_printer->post_compaction(hr, G1HRPrinter::ContinuesHumongous); |
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1263 } |
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1264 } |
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1265 return false; |
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1266 } |
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1267 |
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1268 PostCompactionPrinterClosure(G1HRPrinter* hr_printer) |
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1269 : _hr_printer(hr_printer) { } |
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1270 }; |
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1271 |
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1272 void G1CollectedHeap::print_hrs_post_compaction() { |
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1273 PostCompactionPrinterClosure cl(hr_printer()); |
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1274 heap_region_iterate(&cl); |
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1275 } |
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1276 |
1973 | 1277 bool G1CollectedHeap::do_collection(bool explicit_gc, |
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1278 bool clear_all_soft_refs, |
342 | 1279 size_t word_size) { |
2152 | 1280 assert_at_safepoint(true /* should_be_vm_thread */); |
1281 | |
1359
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1282 if (GC_locker::check_active_before_gc()) { |
1973 | 1283 return false; |
1359
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1284 } |
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1285 |
10405 | 1286 STWGCTimer* gc_timer = G1MarkSweep::gc_timer(); |
13400
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1287 gc_timer->register_gc_start(); |
10405 | 1288 |
1289 SerialOldTracer* gc_tracer = G1MarkSweep::gc_tracer(); | |
1290 gc_tracer->report_gc_start(gc_cause(), gc_timer->gc_start()); | |
1291 | |
2125
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1292 SvcGCMarker sgcm(SvcGCMarker::FULL); |
342 | 1293 ResourceMark rm; |
1294 | |
4872
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1295 print_heap_before_gc(); |
10405 | 1296 trace_heap_before_gc(gc_tracer); |
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1297 |
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1298 size_t metadata_prev_used = MetaspaceAux::used_bytes(); |
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1299 |
2152 | 1300 verify_region_sets_optional(); |
342 | 1301 |
1387
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1302 const bool do_clear_all_soft_refs = clear_all_soft_refs || |
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1303 collector_policy()->should_clear_all_soft_refs(); |
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1304 |
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1305 ClearedAllSoftRefs casr(do_clear_all_soft_refs, collector_policy()); |
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1306 |
342 | 1307 { |
1308 IsGCActiveMark x; | |
1309 | |
1310 // Timing | |
6030 | 1311 assert(gc_cause() != GCCause::_java_lang_system_gc || explicit_gc, "invariant"); |
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1312 gclog_or_tty->date_stamp(G1Log::fine() && PrintGCDateStamps); |
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1313 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
6030 | 1314 |
342 | 1315 { |
10405 | 1316 GCTraceTime t(GCCauseString("Full GC", gc_cause()), G1Log::fine(), true, NULL); |
10098
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1317 TraceCollectorStats tcs(g1mm()->full_collection_counters()); |
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1318 TraceMemoryManagerStats tms(true /* fullGC */, gc_cause()); |
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1319 |
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1320 double start = os::elapsedTime(); |
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1321 g1_policy()->record_full_collection_start(); |
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1322 |
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1323 // Note: When we have a more flexible GC logging framework that |
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1324 // allows us to add optional attributes to a GC log record we |
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1325 // could consider timing and reporting how long we wait in the |
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1326 // following two methods. |
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1327 wait_while_free_regions_coming(); |
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1328 // If we start the compaction before the CM threads finish |
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1329 // scanning the root regions we might trip them over as we'll |
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1330 // be moving objects / updating references. So let's wait until |
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1331 // they are done. By telling them to abort, they should complete |
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1332 // early. |
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1333 _cm->root_regions()->abort(); |
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1334 _cm->root_regions()->wait_until_scan_finished(); |
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1335 append_secondary_free_list_if_not_empty_with_lock(); |
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1336 |
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1337 gc_prologue(true); |
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1338 increment_total_collections(true /* full gc */); |
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1339 increment_old_marking_cycles_started(); |
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1340 |
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1341 assert(used() == recalculate_used(), "Should be equal"); |
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1342 |
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1343 verify_before_gc(); |
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1344 |
10405 | 1345 pre_full_gc_dump(gc_timer); |
10098
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1346 |
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1347 COMPILER2_PRESENT(DerivedPointerTable::clear()); |
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1348 |
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1349 // Disable discovery and empty the discovered lists |
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1350 // for the CM ref processor. |
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1351 ref_processor_cm()->disable_discovery(); |
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1352 ref_processor_cm()->abandon_partial_discovery(); |
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1353 ref_processor_cm()->verify_no_references_recorded(); |
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1354 |
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1355 // Abandon current iterations of concurrent marking and concurrent |
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1356 // refinement, if any are in progress. We have to do this before |
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1357 // wait_until_scan_finished() below. |
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1358 concurrent_mark()->abort(); |
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1359 |
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1360 // Make sure we'll choose a new allocation region afterwards. |
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1361 release_mutator_alloc_region(); |
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1362 abandon_gc_alloc_regions(); |
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1363 g1_rem_set()->cleanupHRRS(); |
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1364 |
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1365 // We should call this after we retire any currently active alloc |
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1366 // regions so that all the ALLOC / RETIRE events are generated |
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1367 // before the start GC event. |
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1368 _hr_printer.start_gc(true /* full */, (size_t) total_collections()); |
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1369 |
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1370 // We may have added regions to the current incremental collection |
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1371 // set between the last GC or pause and now. We need to clear the |
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1372 // incremental collection set and then start rebuilding it afresh |
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1373 // after this full GC. |
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1374 abandon_collection_set(g1_policy()->inc_cset_head()); |
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1375 g1_policy()->clear_incremental_cset(); |
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1376 g1_policy()->stop_incremental_cset_building(); |
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1377 |
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1378 tear_down_region_sets(false /* free_list_only */); |
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1379 g1_policy()->set_gcs_are_young(true); |
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1380 |
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1381 // See the comments in g1CollectedHeap.hpp and |
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|
1382 // G1CollectedHeap::ref_processing_init() about |
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1383 // how reference processing currently works in G1. |
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1384 |
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1385 // Temporarily make discovery by the STW ref processor single threaded (non-MT). |
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1386 ReferenceProcessorMTDiscoveryMutator stw_rp_disc_ser(ref_processor_stw(), false); |
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1387 |
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1388 // Temporarily clear the STW ref processor's _is_alive_non_header field. |
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1389 ReferenceProcessorIsAliveMutator stw_rp_is_alive_null(ref_processor_stw(), NULL); |
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|
1390 |
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1391 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, true /*verify_no_refs*/); |
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1392 ref_processor_stw()->setup_policy(do_clear_all_soft_refs); |
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|
1393 |
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|
1394 // Do collection work |
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1395 { |
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1396 HandleMark hm; // Discard invalid handles created during gc |
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1397 G1MarkSweep::invoke_at_safepoint(ref_processor_stw(), do_clear_all_soft_refs); |
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1398 } |
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|
1399 |
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1400 assert(free_regions() == 0, "we should not have added any free regions"); |
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1401 rebuild_region_sets(false /* free_list_only */); |
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1402 |
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1403 // Enqueue any discovered reference objects that have |
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1404 // not been removed from the discovered lists. |
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1405 ref_processor_stw()->enqueue_discovered_references(); |
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1406 |
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1407 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
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1408 |
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1409 MemoryService::track_memory_usage(); |
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1410 |
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1411 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
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1412 ref_processor_stw()->verify_no_references_recorded(); |
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1413 |
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1414 // Delete metaspaces for unloaded class loaders and clean up loader_data graph |
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|
1415 ClassLoaderDataGraph::purge(); |
12080 | 1416 MetaspaceAux::verify_metrics(); |
10098
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1417 |
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1418 // Note: since we've just done a full GC, concurrent |
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1419 // marking is no longer active. Therefore we need not |
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1420 // re-enable reference discovery for the CM ref processor. |
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1421 // That will be done at the start of the next marking cycle. |
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1422 assert(!ref_processor_cm()->discovery_enabled(), "Postcondition"); |
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1423 ref_processor_cm()->verify_no_references_recorded(); |
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|
1424 |
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|
1425 reset_gc_time_stamp(); |
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1426 // Since everything potentially moved, we will clear all remembered |
10405 | 1427 // sets, and clear all cards. Later we will rebuild remembered |
10098
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1428 // sets. We will also reset the GC time stamps of the regions. |
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1429 clear_rsets_post_compaction(); |
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|
1430 check_gc_time_stamps(); |
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|
1431 |
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|
1432 // Resize the heap if necessary. |
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|
1433 resize_if_necessary_after_full_collection(explicit_gc ? 0 : word_size); |
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|
1434 |
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|
1435 if (_hr_printer.is_active()) { |
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1436 // We should do this after we potentially resize the heap so |
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1437 // that all the COMMIT / UNCOMMIT events are generated before |
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1438 // the end GC event. |
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|
1439 |
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|
1440 print_hrs_post_compaction(); |
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|
1441 _hr_printer.end_gc(true /* full */, (size_t) total_collections()); |
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|
1442 } |
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|
1443 |
10246
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|
1444 G1HotCardCache* hot_card_cache = _cg1r->hot_card_cache(); |
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|
1445 if (hot_card_cache->use_cache()) { |
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|
1446 hot_card_cache->reset_card_counts(); |
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|
1447 hot_card_cache->reset_hot_cache(); |
10098
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|
1448 } |
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|
1449 |
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|
1450 // Rebuild remembered sets of all regions. |
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|
1451 if (G1CollectedHeap::use_parallel_gc_threads()) { |
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|
1452 uint n_workers = |
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|
1453 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
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|
1454 workers()->active_workers(), |
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|
1455 Threads::number_of_non_daemon_threads()); |
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|
1456 assert(UseDynamicNumberOfGCThreads || |
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|
1457 n_workers == workers()->total_workers(), |
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|
1458 "If not dynamic should be using all the workers"); |
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|
1459 workers()->set_active_workers(n_workers); |
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|
1460 // Set parallel threads in the heap (_n_par_threads) only |
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1461 // before a parallel phase and always reset it to 0 after |
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|
1462 // the phase so that the number of parallel threads does |
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1463 // no get carried forward to a serial phase where there |
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1464 // may be code that is "possibly_parallel". |
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|
1465 set_par_threads(n_workers); |
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|
1466 |
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|
1467 ParRebuildRSTask rebuild_rs_task(this); |
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|
1468 assert(check_heap_region_claim_values( |
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|
1469 HeapRegion::InitialClaimValue), "sanity check"); |
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|
1470 assert(UseDynamicNumberOfGCThreads || |
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|
1471 workers()->active_workers() == workers()->total_workers(), |
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|
1472 "Unless dynamic should use total workers"); |
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|
1473 // Use the most recent number of active workers |
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1474 assert(workers()->active_workers() > 0, |
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|
1475 "Active workers not properly set"); |
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|
1476 set_par_threads(workers()->active_workers()); |
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|
1477 workers()->run_task(&rebuild_rs_task); |
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|
1478 set_par_threads(0); |
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|
1479 assert(check_heap_region_claim_values( |
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|
1480 HeapRegion::RebuildRSClaimValue), "sanity check"); |
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1481 reset_heap_region_claim_values(); |
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|
1482 } else { |
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|
1483 RebuildRSOutOfRegionClosure rebuild_rs(this); |
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|
1484 heap_region_iterate(&rebuild_rs); |
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|
1485 } |
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|
1486 |
12080 | 1487 // Rebuild the strong code root lists for each region |
1488 rebuild_strong_code_roots(); | |
1489 | |
10098
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|
1490 if (true) { // FIXME |
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|
1491 MetaspaceGC::compute_new_size(); |
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1492 } |
342 | 1493 |
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
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diff
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|
1494 #ifdef TRACESPINNING |
10098
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|
1495 ParallelTaskTerminator::print_termination_counts(); |
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
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545
diff
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|
1496 #endif |
05c6d52fa7a9
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545
diff
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|
1497 |
10098
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|
1498 // Discard all rset updates |
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|
1499 JavaThread::dirty_card_queue_set().abandon_logs(); |
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|
1500 assert(!G1DeferredRSUpdate |
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|
1501 || (G1DeferredRSUpdate && |
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1502 (dirty_card_queue_set().completed_buffers_num() == 0)), "Should not be any"); |
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|
1503 |
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1504 _young_list->reset_sampled_info(); |
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1505 // At this point there should be no regions in the |
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|
1506 // entire heap tagged as young. |
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|
1507 assert(check_young_list_empty(true /* check_heap */), |
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1508 "young list should be empty at this point"); |
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|
1509 |
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1510 // Update the number of full collections that have been completed. |
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1511 increment_old_marking_cycles_completed(false /* concurrent */); |
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1512 |
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1513 _hrs.verify_optional(); |
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1514 verify_region_sets_optional(); |
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1515 |
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1516 verify_after_gc(); |
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1517 |
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1518 // Start a new incremental collection set for the next pause |
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1519 assert(g1_policy()->collection_set() == NULL, "must be"); |
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1520 g1_policy()->start_incremental_cset_building(); |
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1521 |
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1522 // Clear the _cset_fast_test bitmap in anticipation of adding |
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1523 // regions to the incremental collection set for the next |
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1524 // evacuation pause. |
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1525 clear_cset_fast_test(); |
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1526 |
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1527 init_mutator_alloc_region(); |
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1528 |
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1529 double end = os::elapsedTime(); |
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1530 g1_policy()->record_full_collection_end(); |
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1531 |
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1532 if (G1Log::fine()) { |
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1533 g1_policy()->print_heap_transition(); |
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1534 } |
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1535 |
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1536 // We must call G1MonitoringSupport::update_sizes() in the same scoping level |
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1537 // as an active TraceMemoryManagerStats object (i.e. before the destructor for the |
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1538 // TraceMemoryManagerStats is called) so that the G1 memory pools are updated |
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1539 // before any GC notifications are raised. |
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1540 g1mm()->update_sizes(); |
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1541 |
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1542 gc_epilogue(true); |
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1543 } |
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1544 |
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1545 if (G1Log::finer()) { |
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1546 g1_policy()->print_detailed_heap_transition(true /* full */); |
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1547 } |
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1548 |
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1549 print_heap_after_gc(); |
10405 | 1550 trace_heap_after_gc(gc_tracer); |
1551 | |
1552 post_full_gc_dump(gc_timer); | |
1553 | |
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1554 gc_timer->register_gc_end(); |
10405 | 1555 gc_tracer->report_gc_end(gc_timer->gc_end(), gc_timer->time_partitions()); |
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1556 } |
1973 | 1557 |
1558 return true; | |
342 | 1559 } |
1560 | |
1561 void G1CollectedHeap::do_full_collection(bool clear_all_soft_refs) { | |
1973 | 1562 // do_collection() will return whether it succeeded in performing |
1563 // the GC. Currently, there is no facility on the | |
1564 // do_full_collection() API to notify the caller than the collection | |
1565 // did not succeed (e.g., because it was locked out by the GC | |
1566 // locker). So, right now, we'll ignore the return value. | |
1567 bool dummy = do_collection(true, /* explicit_gc */ | |
1568 clear_all_soft_refs, | |
1569 0 /* word_size */); | |
342 | 1570 } |
1571 | |
1572 // This code is mostly copied from TenuredGeneration. | |
1573 void | |
1574 G1CollectedHeap:: | |
1575 resize_if_necessary_after_full_collection(size_t word_size) { | |
1576 // Include the current allocation, if any, and bytes that will be | |
1577 // pre-allocated to support collections, as "used". | |
1578 const size_t used_after_gc = used(); | |
1579 const size_t capacity_after_gc = capacity(); | |
1580 const size_t free_after_gc = capacity_after_gc - used_after_gc; | |
1581 | |
1717
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1582 // This is enforced in arguments.cpp. |
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1583 assert(MinHeapFreeRatio <= MaxHeapFreeRatio, |
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1584 "otherwise the code below doesn't make sense"); |
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1585 |
342 | 1586 // We don't have floating point command-line arguments |
1717
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1587 const double minimum_free_percentage = (double) MinHeapFreeRatio / 100.0; |
342 | 1588 const double maximum_used_percentage = 1.0 - minimum_free_percentage; |
1717
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1589 const double maximum_free_percentage = (double) MaxHeapFreeRatio / 100.0; |
342 | 1590 const double minimum_used_percentage = 1.0 - maximum_free_percentage; |
1591 | |
1717
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1592 const size_t min_heap_size = collector_policy()->min_heap_byte_size(); |
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1593 const size_t max_heap_size = collector_policy()->max_heap_byte_size(); |
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1594 |
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1595 // We have to be careful here as these two calculations can overflow |
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1596 // 32-bit size_t's. |
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1597 double used_after_gc_d = (double) used_after_gc; |
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1598 double minimum_desired_capacity_d = used_after_gc_d / maximum_used_percentage; |
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1599 double maximum_desired_capacity_d = used_after_gc_d / minimum_used_percentage; |
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1600 |
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1601 // Let's make sure that they are both under the max heap size, which |
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1602 // by default will make them fit into a size_t. |
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1603 double desired_capacity_upper_bound = (double) max_heap_size; |
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1604 minimum_desired_capacity_d = MIN2(minimum_desired_capacity_d, |
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1605 desired_capacity_upper_bound); |
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1606 maximum_desired_capacity_d = MIN2(maximum_desired_capacity_d, |
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1607 desired_capacity_upper_bound); |
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1608 |
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1609 // We can now safely turn them into size_t's. |
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1610 size_t minimum_desired_capacity = (size_t) minimum_desired_capacity_d; |
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1611 size_t maximum_desired_capacity = (size_t) maximum_desired_capacity_d; |
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1612 |
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1613 // This assert only makes sense here, before we adjust them |
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1614 // with respect to the min and max heap size. |
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1615 assert(minimum_desired_capacity <= maximum_desired_capacity, |
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1616 err_msg("minimum_desired_capacity = "SIZE_FORMAT", " |
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1617 "maximum_desired_capacity = "SIZE_FORMAT, |
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1618 minimum_desired_capacity, maximum_desired_capacity)); |
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1619 |
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1620 // Should not be greater than the heap max size. No need to adjust |
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1621 // it with respect to the heap min size as it's a lower bound (i.e., |
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1622 // we'll try to make the capacity larger than it, not smaller). |
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1623 minimum_desired_capacity = MIN2(minimum_desired_capacity, max_heap_size); |
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1624 // Should not be less than the heap min size. No need to adjust it |
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1625 // with respect to the heap max size as it's an upper bound (i.e., |
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1626 // we'll try to make the capacity smaller than it, not greater). |
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1627 maximum_desired_capacity = MAX2(maximum_desired_capacity, min_heap_size); |
342 | 1628 |
1717
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1629 if (capacity_after_gc < minimum_desired_capacity) { |
342 | 1630 // Don't expand unless it's significant |
1631 size_t expand_bytes = minimum_desired_capacity - capacity_after_gc; | |
3914
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1632 ergo_verbose4(ErgoHeapSizing, |
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1633 "attempt heap expansion", |
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1634 ergo_format_reason("capacity lower than " |
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1635 "min desired capacity after Full GC") |
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1636 ergo_format_byte("capacity") |
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1637 ergo_format_byte("occupancy") |
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1638 ergo_format_byte_perc("min desired capacity"), |
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1639 capacity_after_gc, used_after_gc, |
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1640 minimum_desired_capacity, (double) MinHeapFreeRatio); |
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1641 expand(expand_bytes); |
342 | 1642 |
1643 // No expansion, now see if we want to shrink | |
1717
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1644 } else if (capacity_after_gc > maximum_desired_capacity) { |
342 | 1645 // Capacity too large, compute shrinking size |
1646 size_t shrink_bytes = capacity_after_gc - maximum_desired_capacity; | |
3914
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1647 ergo_verbose4(ErgoHeapSizing, |
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1648 "attempt heap shrinking", |
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1649 ergo_format_reason("capacity higher than " |
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1650 "max desired capacity after Full GC") |
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1651 ergo_format_byte("capacity") |
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1652 ergo_format_byte("occupancy") |
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1653 ergo_format_byte_perc("max desired capacity"), |
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1654 capacity_after_gc, used_after_gc, |
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1655 maximum_desired_capacity, (double) MaxHeapFreeRatio); |
342 | 1656 shrink(shrink_bytes); |
1657 } | |
1658 } | |
1659 | |
1660 | |
1661 HeapWord* | |
1973 | 1662 G1CollectedHeap::satisfy_failed_allocation(size_t word_size, |
1663 bool* succeeded) { | |
2152 | 1664 assert_at_safepoint(true /* should_be_vm_thread */); |
1973 | 1665 |
1666 *succeeded = true; | |
1667 // Let's attempt the allocation first. | |
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1668 HeapWord* result = |
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1669 attempt_allocation_at_safepoint(word_size, |
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1670 false /* expect_null_mutator_alloc_region */); |
1973 | 1671 if (result != NULL) { |
1672 assert(*succeeded, "sanity"); | |
1673 return result; | |
1674 } | |
342 | 1675 |
1676 // In a G1 heap, we're supposed to keep allocation from failing by | |
1677 // incremental pauses. Therefore, at least for now, we'll favor | |
1678 // expansion over collection. (This might change in the future if we can | |
1679 // do something smarter than full collection to satisfy a failed alloc.) | |
1680 result = expand_and_allocate(word_size); | |
1681 if (result != NULL) { | |
1973 | 1682 assert(*succeeded, "sanity"); |
342 | 1683 return result; |
1684 } | |
1685 | |
1973 | 1686 // Expansion didn't work, we'll try to do a Full GC. |
1687 bool gc_succeeded = do_collection(false, /* explicit_gc */ | |
1688 false, /* clear_all_soft_refs */ | |
1689 word_size); | |
1690 if (!gc_succeeded) { | |
1691 *succeeded = false; | |
1692 return NULL; | |
1693 } | |
1694 | |
1695 // Retry the allocation | |
1696 result = attempt_allocation_at_safepoint(word_size, | |
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1697 true /* expect_null_mutator_alloc_region */); |
342 | 1698 if (result != NULL) { |
1973 | 1699 assert(*succeeded, "sanity"); |
342 | 1700 return result; |
1701 } | |
1702 | |
1973 | 1703 // Then, try a Full GC that will collect all soft references. |
1704 gc_succeeded = do_collection(false, /* explicit_gc */ | |
1705 true, /* clear_all_soft_refs */ | |
1706 word_size); | |
1707 if (!gc_succeeded) { | |
1708 *succeeded = false; | |
1709 return NULL; | |
1710 } | |
1711 | |
1712 // Retry the allocation once more | |
1713 result = attempt_allocation_at_safepoint(word_size, | |
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1714 true /* expect_null_mutator_alloc_region */); |
342 | 1715 if (result != NULL) { |
1973 | 1716 assert(*succeeded, "sanity"); |
342 | 1717 return result; |
1718 } | |
1719 | |
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1720 assert(!collector_policy()->should_clear_all_soft_refs(), |
1973 | 1721 "Flag should have been handled and cleared prior to this point"); |
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1722 |
342 | 1723 // What else? We might try synchronous finalization later. If the total |
1724 // space available is large enough for the allocation, then a more | |
1725 // complete compaction phase than we've tried so far might be | |
1726 // appropriate. | |
1973 | 1727 assert(*succeeded, "sanity"); |
342 | 1728 return NULL; |
1729 } | |
1730 | |
1731 // Attempting to expand the heap sufficiently | |
1732 // to support an allocation of the given "word_size". If | |
1733 // successful, perform the allocation and return the address of the | |
1734 // allocated block, or else "NULL". | |
1735 | |
1736 HeapWord* G1CollectedHeap::expand_and_allocate(size_t word_size) { | |
2152 | 1737 assert_at_safepoint(true /* should_be_vm_thread */); |
1738 | |
1739 verify_region_sets_optional(); | |
1973 | 1740 |
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1741 size_t expand_bytes = MAX2(word_size * HeapWordSize, MinHeapDeltaBytes); |
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1742 ergo_verbose1(ErgoHeapSizing, |
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1743 "attempt heap expansion", |
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1744 ergo_format_reason("allocation request failed") |
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1745 ergo_format_byte("allocation request"), |
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1746 word_size * HeapWordSize); |
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1747 if (expand(expand_bytes)) { |
3766 | 1748 _hrs.verify_optional(); |
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1749 verify_region_sets_optional(); |
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1750 return attempt_allocation_at_safepoint(word_size, |
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1751 false /* expect_null_mutator_alloc_region */); |
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1752 } |
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1753 return NULL; |
342 | 1754 } |
1755 | |
3766 | 1756 void G1CollectedHeap::update_committed_space(HeapWord* old_end, |
1757 HeapWord* new_end) { | |
1758 assert(old_end != new_end, "don't call this otherwise"); | |
1759 assert((HeapWord*) _g1_storage.high() == new_end, "invariant"); | |
1760 | |
1761 // Update the committed mem region. | |
1762 _g1_committed.set_end(new_end); | |
1763 // Tell the card table about the update. | |
1764 Universe::heap()->barrier_set()->resize_covered_region(_g1_committed); | |
1765 // Tell the BOT about the update. | |
1766 _bot_shared->resize(_g1_committed.word_size()); | |
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1767 // Tell the hot card cache about the update |
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1768 _cg1r->hot_card_cache()->resize_card_counts(capacity()); |
3766 | 1769 } |
1770 | |
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1771 bool G1CollectedHeap::expand(size_t expand_bytes) { |
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1772 size_t aligned_expand_bytes = ReservedSpace::page_align_size_up(expand_bytes); |
342 | 1773 aligned_expand_bytes = align_size_up(aligned_expand_bytes, |
1774 HeapRegion::GrainBytes); | |
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1775 ergo_verbose2(ErgoHeapSizing, |
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1776 "expand the heap", |
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1777 ergo_format_byte("requested expansion amount") |
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1778 ergo_format_byte("attempted expansion amount"), |
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1779 expand_bytes, aligned_expand_bytes); |
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1780 |
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1781 if (_g1_storage.uncommitted_size() == 0) { |
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1782 ergo_verbose0(ErgoHeapSizing, |
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1783 "did not expand the heap", |
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1784 ergo_format_reason("heap already fully expanded")); |
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1785 return false; |
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1786 } |
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1787 |
3766 | 1788 // First commit the memory. |
1789 HeapWord* old_end = (HeapWord*) _g1_storage.high(); | |
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1790 bool successful = _g1_storage.expand_by(aligned_expand_bytes); |
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1791 if (successful) { |
3766 | 1792 // Then propagate this update to the necessary data structures. |
1793 HeapWord* new_end = (HeapWord*) _g1_storage.high(); | |
1794 update_committed_space(old_end, new_end); | |
1795 | |
1796 FreeRegionList expansion_list("Local Expansion List"); | |
1797 MemRegion mr = _hrs.expand_by(old_end, new_end, &expansion_list); | |
1798 assert(mr.start() == old_end, "post-condition"); | |
1799 // mr might be a smaller region than what was requested if | |
1800 // expand_by() was unable to allocate the HeapRegion instances | |
1801 assert(mr.end() <= new_end, "post-condition"); | |
1802 | |
1803 size_t actual_expand_bytes = mr.byte_size(); | |
1804 assert(actual_expand_bytes <= aligned_expand_bytes, "post-condition"); | |
1805 assert(actual_expand_bytes == expansion_list.total_capacity_bytes(), | |
1806 "post-condition"); | |
1807 if (actual_expand_bytes < aligned_expand_bytes) { | |
1808 // We could not expand _hrs to the desired size. In this case we | |
1809 // need to shrink the committed space accordingly. | |
1810 assert(mr.end() < new_end, "invariant"); | |
1811 | |
1812 size_t diff_bytes = aligned_expand_bytes - actual_expand_bytes; | |
1813 // First uncommit the memory. | |
1814 _g1_storage.shrink_by(diff_bytes); | |
1815 // Then propagate this update to the necessary data structures. | |
1816 update_committed_space(new_end, mr.end()); | |
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1817 } |
3766 | 1818 _free_list.add_as_tail(&expansion_list); |
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1819 |
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1820 if (_hr_printer.is_active()) { |
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1821 HeapWord* curr = mr.start(); |
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1822 while (curr < mr.end()) { |
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1823 HeapWord* curr_end = curr + HeapRegion::GrainWords; |
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1824 _hr_printer.commit(curr, curr_end); |
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1825 curr = curr_end; |
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1826 } |
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1827 assert(curr == mr.end(), "post-condition"); |
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1828 } |
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1829 g1_policy()->record_new_heap_size(n_regions()); |
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1830 } else { |
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1831 ergo_verbose0(ErgoHeapSizing, |
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1832 "did not expand the heap", |
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1833 ergo_format_reason("heap expansion operation failed")); |
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1834 // The expansion of the virtual storage space was unsuccessful. |
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1835 // Let's see if it was because we ran out of swap. |
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1836 if (G1ExitOnExpansionFailure && |
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1837 _g1_storage.uncommitted_size() >= aligned_expand_bytes) { |
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1838 // We had head room... |
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1839 vm_exit_out_of_memory(aligned_expand_bytes, OOM_MMAP_ERROR, "G1 heap expansion"); |
342 | 1840 } |
1841 } | |
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1842 return successful; |
342 | 1843 } |
1844 | |
3766 | 1845 void G1CollectedHeap::shrink_helper(size_t shrink_bytes) { |
342 | 1846 size_t aligned_shrink_bytes = |
1847 ReservedSpace::page_align_size_down(shrink_bytes); | |
1848 aligned_shrink_bytes = align_size_down(aligned_shrink_bytes, | |
1849 HeapRegion::GrainBytes); | |
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1850 uint num_regions_to_remove = (uint)(shrink_bytes / HeapRegion::GrainBytes); |
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1851 |
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1852 uint num_regions_removed = _hrs.shrink_by(num_regions_to_remove); |
3766 | 1853 HeapWord* old_end = (HeapWord*) _g1_storage.high(); |
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1854 size_t shrunk_bytes = num_regions_removed * HeapRegion::GrainBytes; |
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1855 |
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1856 ergo_verbose3(ErgoHeapSizing, |
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1857 "shrink the heap", |
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1858 ergo_format_byte("requested shrinking amount") |
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1859 ergo_format_byte("aligned shrinking amount") |
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1860 ergo_format_byte("attempted shrinking amount"), |
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1861 shrink_bytes, aligned_shrink_bytes, shrunk_bytes); |
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1862 if (num_regions_removed > 0) { |
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1863 _g1_storage.shrink_by(shrunk_bytes); |
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1864 HeapWord* new_end = (HeapWord*) _g1_storage.high(); |
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1865 |
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1866 if (_hr_printer.is_active()) { |
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1867 HeapWord* curr = old_end; |
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1868 while (curr > new_end) { |
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1869 HeapWord* curr_end = curr; |
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1870 curr -= HeapRegion::GrainWords; |
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1871 _hr_printer.uncommit(curr, curr_end); |
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1872 } |
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1873 } |
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1874 |
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1875 _expansion_regions += num_regions_removed; |
3766 | 1876 update_committed_space(old_end, new_end); |
1877 HeapRegionRemSet::shrink_heap(n_regions()); | |
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1878 g1_policy()->record_new_heap_size(n_regions()); |
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1879 } else { |
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1880 ergo_verbose0(ErgoHeapSizing, |
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1881 "did not shrink the heap", |
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1882 ergo_format_reason("heap shrinking operation failed")); |
342 | 1883 } |
1884 } | |
1885 | |
1886 void G1CollectedHeap::shrink(size_t shrink_bytes) { | |
2152 | 1887 verify_region_sets_optional(); |
1888 | |
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1889 // We should only reach here at the end of a Full GC which means we |
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1890 // should not not be holding to any GC alloc regions. The method |
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1891 // below will make sure of that and do any remaining clean up. |
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1892 abandon_gc_alloc_regions(); |
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1893 |
2152 | 1894 // Instead of tearing down / rebuilding the free lists here, we |
1895 // could instead use the remove_all_pending() method on free_list to | |
1896 // remove only the ones that we need to remove. | |
4072 | 1897 tear_down_region_sets(true /* free_list_only */); |
342 | 1898 shrink_helper(shrink_bytes); |
4072 | 1899 rebuild_region_sets(true /* free_list_only */); |
2152 | 1900 |
3766 | 1901 _hrs.verify_optional(); |
2152 | 1902 verify_region_sets_optional(); |
342 | 1903 } |
1904 | |
1905 // Public methods. | |
1906 | |
1907 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away | |
1908 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list | |
1909 #endif // _MSC_VER | |
1910 | |
1911 | |
1912 G1CollectedHeap::G1CollectedHeap(G1CollectorPolicy* policy_) : | |
1913 SharedHeap(policy_), | |
1914 _g1_policy(policy_), | |
1111 | 1915 _dirty_card_queue_set(false), |
1705 | 1916 _into_cset_dirty_card_queue_set(false), |
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1917 _is_alive_closure_cm(this), |
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1918 _is_alive_closure_stw(this), |
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1919 _ref_processor_cm(NULL), |
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1920 _ref_processor_stw(NULL), |
342 | 1921 _process_strong_tasks(new SubTasksDone(G1H_PS_NumElements)), |
1922 _bot_shared(NULL), | |
10405 | 1923 _evac_failure_scan_stack(NULL), |
342 | 1924 _mark_in_progress(false), |
2152 | 1925 _cg1r(NULL), _summary_bytes_used(0), |
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1926 _g1mm(NULL), |
342 | 1927 _refine_cte_cl(NULL), |
1928 _full_collection(false), | |
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1929 _free_list("Master Free List", new MasterFreeRegionListMtSafeChecker()), |
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1930 _secondary_free_list("Secondary Free List", new SecondaryFreeRegionListMtSafeChecker()), |
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1931 _old_set("Old Set", false /* humongous */, new OldRegionSetMtSafeChecker()), |
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1932 _humongous_set("Master Humongous Set", true /* humongous */, new HumongousRegionSetMtSafeChecker()), |
2152 | 1933 _free_regions_coming(false), |
342 | 1934 _young_list(new YoungList(this)), |
1935 _gc_time_stamp(0), | |
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1936 _retained_old_gc_alloc_region(NULL), |
6595 | 1937 _survivor_plab_stats(YoungPLABSize, PLABWeight), |
1938 _old_plab_stats(OldPLABSize, PLABWeight), | |
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1939 _expand_heap_after_alloc_failure(true), |
526 | 1940 _surviving_young_words(NULL), |
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1941 _old_marking_cycles_started(0), |
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1942 _old_marking_cycles_completed(0), |
10405 | 1943 _concurrent_cycle_started(false), |
526 | 1944 _in_cset_fast_test(NULL), |
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1945 _in_cset_fast_test_base(NULL), |
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1946 _dirty_cards_region_list(NULL), |
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1947 _worker_cset_start_region(NULL), |
10405 | 1948 _worker_cset_start_region_time_stamp(NULL), |
1949 _gc_timer_stw(new (ResourceObj::C_HEAP, mtGC) STWGCTimer()), | |
1950 _gc_timer_cm(new (ResourceObj::C_HEAP, mtGC) ConcurrentGCTimer()), | |
1951 _gc_tracer_stw(new (ResourceObj::C_HEAP, mtGC) G1NewTracer()), | |
1952 _gc_tracer_cm(new (ResourceObj::C_HEAP, mtGC) G1OldTracer()) { | |
1953 | |
1954 _g1h = this; | |
342 | 1955 if (_process_strong_tasks == NULL || !_process_strong_tasks->valid()) { |
1956 vm_exit_during_initialization("Failed necessary allocation."); | |
1957 } | |
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1958 |
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1959 _humongous_object_threshold_in_words = HeapRegion::GrainWords / 2; |
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1960 |
342 | 1961 int n_queues = MAX2((int)ParallelGCThreads, 1); |
1962 _task_queues = new RefToScanQueueSet(n_queues); | |
1963 | |
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1964 uint n_rem_sets = HeapRegionRemSet::num_par_rem_sets(); |
342 | 1965 assert(n_rem_sets > 0, "Invariant."); |
1966 | |
6197 | 1967 _worker_cset_start_region = NEW_C_HEAP_ARRAY(HeapRegion*, n_queues, mtGC); |
1968 _worker_cset_start_region_time_stamp = NEW_C_HEAP_ARRAY(unsigned int, n_queues, mtGC); | |
10405 | 1969 _evacuation_failed_info_array = NEW_C_HEAP_ARRAY(EvacuationFailedInfo, n_queues, mtGC); |
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1970 |
342 | 1971 for (int i = 0; i < n_queues; i++) { |
1972 RefToScanQueue* q = new RefToScanQueue(); | |
1973 q->initialize(); | |
1974 _task_queues->register_queue(i, q); | |
10405 | 1975 ::new (&_evacuation_failed_info_array[i]) EvacuationFailedInfo(); |
1976 } | |
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1977 clear_cset_start_regions(); |
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1978 |
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1979 // Initialize the G1EvacuationFailureALot counters and flags. |
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1980 NOT_PRODUCT(reset_evacuation_should_fail();) |
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1981 |
342 | 1982 guarantee(_task_queues != NULL, "task_queues allocation failure."); |
1983 } | |
1984 | |
1985 jint G1CollectedHeap::initialize() { | |
1166 | 1986 CollectedHeap::pre_initialize(); |
342 | 1987 os::enable_vtime(); |
1988 | |
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1989 G1Log::init(); |
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1990 |
342 | 1991 // Necessary to satisfy locking discipline assertions. |
1992 | |
1993 MutexLocker x(Heap_lock); | |
1994 | |
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1995 // We have to initialize the printer before committing the heap, as |
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1996 // it will be used then. |
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1997 _hr_printer.set_active(G1PrintHeapRegions); |
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1998 |
342 | 1999 // While there are no constraints in the GC code that HeapWordSize |
2000 // be any particular value, there are multiple other areas in the | |
2001 // system which believe this to be true (e.g. oop->object_size in some | |
2002 // cases incorrectly returns the size in wordSize units rather than | |
2003 // HeapWordSize). | |
2004 guarantee(HeapWordSize == wordSize, "HeapWordSize must equal wordSize"); | |
2005 | |
2006 size_t init_byte_size = collector_policy()->initial_heap_byte_size(); | |
2007 size_t max_byte_size = collector_policy()->max_heap_byte_size(); | |
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2008 size_t heap_alignment = collector_policy()->heap_alignment(); |
342 | 2009 |
2010 // Ensure that the sizes are properly aligned. | |
2011 Universe::check_alignment(init_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
2012 Universe::check_alignment(max_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
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2013 Universe::check_alignment(max_byte_size, heap_alignment, "g1 heap"); |
342 | 2014 |
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2015 _cg1r = new ConcurrentG1Refine(this); |
342 | 2016 |
2017 // Reserve the maximum. | |
642
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2018 |
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2019 // When compressed oops are enabled, the preferred heap base |
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2020 // is calculated by subtracting the requested size from the |
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2021 // 32Gb boundary and using the result as the base address for |
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2022 // heap reservation. If the requested size is not aligned to |
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2023 // HeapRegion::GrainBytes (i.e. the alignment that is passed |
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2024 // into the ReservedHeapSpace constructor) then the actual |
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2025 // base of the reserved heap may end up differing from the |
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2026 // address that was requested (i.e. the preferred heap base). |
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2027 // If this happens then we could end up using a non-optimal |
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2028 // compressed oops mode. |
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2029 |
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2030 ReservedSpace heap_rs = Universe::reserve_heap(max_byte_size, |
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2031 heap_alignment); |
342 | 2032 |
2033 // It is important to do this in a way such that concurrent readers can't | |
10405 | 2034 // temporarily think something is in the heap. (I've actually seen this |
342 | 2035 // happen in asserts: DLD.) |
2036 _reserved.set_word_size(0); | |
2037 _reserved.set_start((HeapWord*)heap_rs.base()); | |
2038 _reserved.set_end((HeapWord*)(heap_rs.base() + heap_rs.size())); | |
2039 | |
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2040 _expansion_regions = (uint) (max_byte_size / HeapRegion::GrainBytes); |
342 | 2041 |
2042 // Create the gen rem set (and barrier set) for the entire reserved region. | |
2043 _rem_set = collector_policy()->create_rem_set(_reserved, 2); | |
2044 set_barrier_set(rem_set()->bs()); | |
12343 | 2045 if (!barrier_set()->is_a(BarrierSet::G1SATBCTLogging)) { |
2046 vm_exit_during_initialization("G1 requires a G1SATBLoggingCardTableModRefBS"); | |
342 | 2047 return JNI_ENOMEM; |
2048 } | |
2049 | |
2050 // Also create a G1 rem set. | |
12343 | 2051 _g1_rem_set = new G1RemSet(this, g1_barrier_set()); |
342 | 2052 |
2053 // Carve out the G1 part of the heap. | |
2054 | |
2055 ReservedSpace g1_rs = heap_rs.first_part(max_byte_size); | |
2056 _g1_reserved = MemRegion((HeapWord*)g1_rs.base(), | |
2057 g1_rs.size()/HeapWordSize); | |
2058 | |
2059 _g1_storage.initialize(g1_rs, 0); | |
2060 _g1_committed = MemRegion((HeapWord*)_g1_storage.low(), (size_t) 0); | |
3766 | 2061 _hrs.initialize((HeapWord*) _g1_reserved.start(), |
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2062 (HeapWord*) _g1_reserved.end()); |
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2063 assert(_hrs.max_length() == _expansion_regions, |
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2064 err_msg("max length: %u expansion regions: %u", |
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2065 _hrs.max_length(), _expansion_regions)); |
342 | 2066 |
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2067 // Do later initialization work for concurrent refinement. |
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2068 _cg1r->init(); |
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2069 |
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2070 // 6843694 - ensure that the maximum region index can fit |
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2071 // in the remembered set structures. |
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2072 const uint max_region_idx = (1U << (sizeof(RegionIdx_t)*BitsPerByte-1)) - 1; |
807
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2073 guarantee((max_regions() - 1) <= max_region_idx, "too many regions"); |
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2074 |
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2075 size_t max_cards_per_region = ((size_t)1 << (sizeof(CardIdx_t)*BitsPerByte-1)) - 1; |
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2076 guarantee(HeapRegion::CardsPerRegion > 0, "make sure it's initialized"); |
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2077 guarantee(HeapRegion::CardsPerRegion < max_cards_per_region, |
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2078 "too many cards per region"); |
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2079 |
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2080 FreeRegionList::set_unrealistically_long_length(max_regions() + 1); |
2152 | 2081 |
342 | 2082 _bot_shared = new G1BlockOffsetSharedArray(_reserved, |
2083 heap_word_size(init_byte_size)); | |
2084 | |
2085 _g1h = this; | |
2086 | |
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2087 _in_cset_fast_test_length = max_regions(); |
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2088 _in_cset_fast_test_base = |
6197 | 2089 NEW_C_HEAP_ARRAY(bool, (size_t) _in_cset_fast_test_length, mtGC); |
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2090 |
10246
194f52aa2f23
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10242
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changeset
|
2091 // We're biasing _in_cset_fast_test to avoid subtracting the |
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
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10242
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|
2092 // beginning of the heap every time we want to index; basically |
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
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|
2093 // it's the same with what we do with the card table. |
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
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parents:
10242
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changeset
|
2094 _in_cset_fast_test = _in_cset_fast_test_base - |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2095 ((uintx) _g1_reserved.start() >> HeapRegion::LogOfHRGrainBytes); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2096 |
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
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10242
diff
changeset
|
2097 // Clear the _cset_fast_test bitmap in anticipation of adding |
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
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10242
diff
changeset
|
2098 // regions to the incremental collection set for the first |
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
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10242
diff
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|
2099 // evacuation pause. |
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
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10242
diff
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|
2100 clear_cset_fast_test(); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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parents:
1391
diff
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|
2101 |
342 | 2102 // Create the ConcurrentMark data structure and thread. |
2103 // (Must do this late, so that "max_regions" is defined.) | |
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2104 _cm = new ConcurrentMark(this, heap_rs); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2105 if (_cm == NULL || !_cm->completed_initialization()) { |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2106 vm_shutdown_during_initialization("Could not create/initialize ConcurrentMark"); |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2107 return JNI_ENOMEM; |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2108 } |
342 | 2109 _cmThread = _cm->cmThread(); |
2110 | |
2111 // Initialize the from_card cache structure of HeapRegionRemSet. | |
2112 HeapRegionRemSet::init_heap(max_regions()); | |
2113 | |
677 | 2114 // Now expand into the initial heap size. |
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2115 if (!expand(init_byte_size)) { |
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
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|
2116 vm_shutdown_during_initialization("Failed to allocate initial heap."); |
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
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|
2117 return JNI_ENOMEM; |
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2118 } |
342 | 2119 |
2120 // Perform any initialization actions delegated to the policy. | |
2121 g1_policy()->init(); | |
2122 | |
2123 _refine_cte_cl = | |
2124 new RefineCardTableEntryClosure(ConcurrentG1RefineThread::sts(), | |
2125 g1_rem_set(), | |
2126 concurrent_g1_refine()); | |
2127 JavaThread::dirty_card_queue_set().set_closure(_refine_cte_cl); | |
2128 | |
2129 JavaThread::satb_mark_queue_set().initialize(SATB_Q_CBL_mon, | |
2130 SATB_Q_FL_lock, | |
1111 | 2131 G1SATBProcessCompletedThreshold, |
342 | 2132 Shared_SATB_Q_lock); |
794 | 2133 |
2134 JavaThread::dirty_card_queue_set().initialize(DirtyCardQ_CBL_mon, | |
2135 DirtyCardQ_FL_lock, | |
1111 | 2136 concurrent_g1_refine()->yellow_zone(), |
2137 concurrent_g1_refine()->red_zone(), | |
794 | 2138 Shared_DirtyCardQ_lock); |
2139 | |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2140 if (G1DeferredRSUpdate) { |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2141 dirty_card_queue_set().initialize(DirtyCardQ_CBL_mon, |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2142 DirtyCardQ_FL_lock, |
1111 | 2143 -1, // never trigger processing |
2144 -1, // no limit on length | |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2145 Shared_DirtyCardQ_lock, |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2146 &JavaThread::dirty_card_queue_set()); |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2147 } |
1705 | 2148 |
2149 // Initialize the card queue set used to hold cards containing | |
2150 // references into the collection set. | |
2151 _into_cset_dirty_card_queue_set.initialize(DirtyCardQ_CBL_mon, | |
2152 DirtyCardQ_FL_lock, | |
2153 -1, // never trigger processing | |
2154 -1, // no limit on length | |
2155 Shared_DirtyCardQ_lock, | |
2156 &JavaThread::dirty_card_queue_set()); | |
2157 | |
342 | 2158 // In case we're keeping closure specialization stats, initialize those |
2159 // counts and that mechanism. | |
2160 SpecializationStats::clear(); | |
2161 | |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2162 // 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
|
2163 // 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
|
2164 // space here, lots of asserts fire. |
3766 | 2165 |
2166 HeapRegion* dummy_region = new_heap_region(0 /* index of bottom region */, | |
2167 _g1_reserved.start()); | |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2168 // 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
|
2169 // 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
|
2170 // region will complain that it cannot support allocations without |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
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|
2171 // BOT updates. So we'll tag the dummy region as young to avoid that. |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2172 dummy_region->set_young(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2173 // Make sure it's full. |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
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|
2174 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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|
2175 G1AllocRegion::setup(this, dummy_region); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
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|
2176 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2177 init_mutator_alloc_region(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2178 |
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
2179 // 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
|
2180 // values in the heap have been properly initialized. |
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
2181 _g1mm = new G1MonitoringSupport(this); |
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
2182 |
17764 | 2183 G1StringDedup::initialize(); |
2184 | |
342 | 2185 return JNI_OK; |
2186 } | |
2187 | |
17947
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
17937
diff
changeset
|
2188 void G1CollectedHeap::stop() { |
17948 | 2189 #if 0 |
2190 // Stopping concurrent worker threads is currently disabled until | |
2191 // some bugs in concurrent mark has been resolve. Without fixing | |
2192 // those bugs first we risk haning during VM exit when trying to | |
2193 // stop these threads. | |
2194 | |
17947
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
17937
diff
changeset
|
2195 // Abort any ongoing concurrent root region scanning and stop all |
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
17937
diff
changeset
|
2196 // concurrent threads. We do this to make sure these threads do |
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
17937
diff
changeset
|
2197 // not continue to execute and access resources (e.g. gclog_or_tty) |
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
17937
diff
changeset
|
2198 // that are destroyed during shutdown. |
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
17937
diff
changeset
|
2199 _cm->root_regions()->abort(); |
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
17937
diff
changeset
|
2200 _cm->root_regions()->wait_until_scan_finished(); |
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
17937
diff
changeset
|
2201 stop_conc_gc_threads(); |
17948 | 2202 #endif |
17947
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
17937
diff
changeset
|
2203 } |
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
17937
diff
changeset
|
2204 |
12233
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2205 size_t G1CollectedHeap::conservative_max_heap_alignment() { |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2206 return HeapRegion::max_region_size(); |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2207 } |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2208 |
342 | 2209 void G1CollectedHeap::ref_processing_init() { |
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
2210 // Reference processing in G1 currently works as follows: |
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
2211 // |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2212 // * There are two reference processor instances. One is |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2213 // used to record and process discovered references |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2214 // during concurrent marking; the other is used to |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2215 // record and process references during STW pauses |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2216 // (both full and incremental). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2217 // * Both ref processors need to 'span' the entire heap as |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2218 // the regions in the collection set may be dotted around. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2219 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2220 // * For the concurrent marking ref processor: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2221 // * Reference discovery is enabled at initial marking. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2222 // * Reference discovery is disabled and the discovered |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2223 // references processed etc during remarking. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2224 // * Reference discovery is MT (see below). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2225 // * Reference discovery requires a barrier (see below). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2226 // * Reference processing may or may not be MT |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2227 // (depending on the value of ParallelRefProcEnabled |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2228 // and ParallelGCThreads). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2229 // * A full GC disables reference discovery by the CM |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2230 // ref processor and abandons any entries on it's |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2231 // discovered lists. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2232 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2233 // * For the STW processor: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
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|
2234 // * Non MT discovery is enabled at the start of a full GC. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
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|
2235 // * Processing and enqueueing during a full GC is non-MT. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
2236 // * During a full GC, references are processed after marking. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2237 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
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|
2238 // * Discovery (may or may not be MT) is enabled at the start |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
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|
2239 // of an incremental evacuation pause. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
2240 // * References are processed near the end of a STW evacuation pause. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
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|
2241 // * For both types of GC: |
4dfb2df418f2
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diff
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|
2242 // * Discovery is atomic - i.e. not concurrent. |
4dfb2df418f2
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parents:
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diff
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|
2243 // * Reference discovery will not need a barrier. |
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
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parents:
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diff
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|
2244 |
342 | 2245 SharedHeap::ref_processing_init(); |
2246 MemRegion mr = reserved_region(); | |
3979
4dfb2df418f2
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|
2247 |
4dfb2df418f2
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diff
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|
2248 // Concurrent Mark ref processor |
4dfb2df418f2
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3973
diff
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|
2249 _ref_processor_cm = |
2369
92da084fefc9
6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads
ysr
parents:
2361
diff
changeset
|
2250 new ReferenceProcessor(mr, // span |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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3973
diff
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|
2251 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
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|
2252 // mt processing |
4dfb2df418f2
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diff
changeset
|
2253 (int) ParallelGCThreads, |
4dfb2df418f2
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diff
changeset
|
2254 // degree of mt processing |
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diff
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|
2255 (ParallelGCThreads > 1) || (ConcGCThreads > 1), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
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|
2256 // mt discovery |
4dfb2df418f2
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diff
changeset
|
2257 (int) MAX2(ParallelGCThreads, ConcGCThreads), |
4dfb2df418f2
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parents:
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diff
changeset
|
2258 // degree of mt discovery |
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diff
changeset
|
2259 false, |
4dfb2df418f2
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diff
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|
2260 // Reference discovery is not atomic |
4dfb2df418f2
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diff
changeset
|
2261 &_is_alive_closure_cm, |
4dfb2df418f2
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diff
changeset
|
2262 // is alive closure |
4dfb2df418f2
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diff
changeset
|
2263 // (for efficiency/performance) |
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2264 true); |
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|
2265 // Setting next fields of discovered |
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|
2266 // lists requires a barrier. |
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|
2267 |
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|
2268 // STW ref processor |
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|
2269 _ref_processor_stw = |
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|
2270 new ReferenceProcessor(mr, // span |
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2271 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
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|
2272 // mt processing |
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2273 MAX2((int)ParallelGCThreads, 1), |
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2274 // degree of mt processing |
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2275 (ParallelGCThreads > 1), |
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|
2276 // mt discovery |
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2277 MAX2((int)ParallelGCThreads, 1), |
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2278 // degree of mt discovery |
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|
2279 true, |
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|
2280 // Reference discovery is atomic |
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2281 &_is_alive_closure_stw, |
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|
2282 // is alive closure |
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|
2283 // (for efficiency/performance) |
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|
2284 false); |
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|
2285 // Setting next fields of discovered |
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2286 // lists does not require a barrier. |
342 | 2287 } |
2288 | |
2289 size_t G1CollectedHeap::capacity() const { | |
2290 return _g1_committed.byte_size(); | |
2291 } | |
2292 | |
6254
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2293 void G1CollectedHeap::reset_gc_time_stamps(HeapRegion* hr) { |
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2294 assert(!hr->continuesHumongous(), "pre-condition"); |
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2295 hr->reset_gc_time_stamp(); |
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2296 if (hr->startsHumongous()) { |
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2297 uint first_index = hr->hrs_index() + 1; |
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2298 uint last_index = hr->last_hc_index(); |
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2299 for (uint i = first_index; i < last_index; i += 1) { |
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2300 HeapRegion* chr = region_at(i); |
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2301 assert(chr->continuesHumongous(), "sanity"); |
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2302 chr->reset_gc_time_stamp(); |
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2303 } |
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2304 } |
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2305 } |
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2306 |
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2307 #ifndef PRODUCT |
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2308 class CheckGCTimeStampsHRClosure : public HeapRegionClosure { |
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2309 private: |
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2310 unsigned _gc_time_stamp; |
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2311 bool _failures; |
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2312 |
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2313 public: |
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2314 CheckGCTimeStampsHRClosure(unsigned gc_time_stamp) : |
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2315 _gc_time_stamp(gc_time_stamp), _failures(false) { } |
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2316 |
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2317 virtual bool doHeapRegion(HeapRegion* hr) { |
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2318 unsigned region_gc_time_stamp = hr->get_gc_time_stamp(); |
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2319 if (_gc_time_stamp != region_gc_time_stamp) { |
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2320 gclog_or_tty->print_cr("Region "HR_FORMAT" has GC time stamp = %d, " |
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2321 "expected %d", HR_FORMAT_PARAMS(hr), |
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2322 region_gc_time_stamp, _gc_time_stamp); |
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2323 _failures = true; |
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2324 } |
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2325 return false; |
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|
2326 } |
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2327 |
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2328 bool failures() { return _failures; } |
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2329 }; |
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2330 |
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2331 void G1CollectedHeap::check_gc_time_stamps() { |
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2332 CheckGCTimeStampsHRClosure cl(_gc_time_stamp); |
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2333 heap_region_iterate(&cl); |
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2334 guarantee(!cl.failures(), "all GC time stamps should have been reset"); |
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2335 } |
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2336 #endif // PRODUCT |
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|
2337 |
1705 | 2338 void G1CollectedHeap::iterate_dirty_card_closure(CardTableEntryClosure* cl, |
2339 DirtyCardQueue* into_cset_dcq, | |
2340 bool concurrent, | |
17844
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|
2341 uint worker_i) { |
889 | 2342 // Clean cards in the hot card cache |
10246
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|
2343 G1HotCardCache* hot_card_cache = _cg1r->hot_card_cache(); |
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|
2344 hot_card_cache->drain(worker_i, g1_rem_set(), into_cset_dcq); |
889 | 2345 |
342 | 2346 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); |
2347 int n_completed_buffers = 0; | |
1705 | 2348 while (dcqs.apply_closure_to_completed_buffer(cl, worker_i, 0, true)) { |
342 | 2349 n_completed_buffers++; |
2350 } | |
6628
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|
2351 g1_policy()->phase_times()->record_update_rs_processed_buffers(worker_i, n_completed_buffers); |
342 | 2352 dcqs.clear_n_completed_buffers(); |
2353 assert(!dcqs.completed_buffers_exist_dirty(), "Completed buffers exist!"); | |
2354 } | |
2355 | |
2356 | |
2357 // Computes the sum of the storage used by the various regions. | |
2358 | |
2359 size_t G1CollectedHeap::used() const { | |
862
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|
2360 assert(Heap_lock->owner() != NULL, |
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|
2361 "Should be owned on this thread's behalf."); |
342 | 2362 size_t result = _summary_bytes_used; |
845
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2363 // Read only once in case it is set to NULL concurrently |
2433
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|
2364 HeapRegion* hr = _mutator_alloc_region.get(); |
845
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|
2365 if (hr != NULL) |
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|
2366 result += hr->used(); |
342 | 2367 return result; |
2368 } | |
2369 | |
846
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
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|
2370 size_t G1CollectedHeap::used_unlocked() const { |
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|
2371 size_t result = _summary_bytes_used; |
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|
2372 return result; |
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|
2373 } |
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|
2374 |
342 | 2375 class SumUsedClosure: public HeapRegionClosure { |
2376 size_t _used; | |
2377 public: | |
2378 SumUsedClosure() : _used(0) {} | |
2379 bool doHeapRegion(HeapRegion* r) { | |
2380 if (!r->continuesHumongous()) { | |
2381 _used += r->used(); | |
2382 } | |
2383 return false; | |
2384 } | |
2385 size_t result() { return _used; } | |
2386 }; | |
2387 | |
2388 size_t G1CollectedHeap::recalculate_used() const { | |
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|
2389 double recalculate_used_start = os::elapsedTime(); |
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2390 |
342 | 2391 SumUsedClosure blk; |
3766 | 2392 heap_region_iterate(&blk); |
17757
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2393 |
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|
2394 g1_policy()->phase_times()->record_evac_fail_recalc_used_time((os::elapsedTime() - recalculate_used_start) * 1000.0); |
342 | 2395 return blk.result(); |
2396 } | |
2397 | |
2398 size_t G1CollectedHeap::unsafe_max_alloc() { | |
2152 | 2399 if (free_regions() > 0) return HeapRegion::GrainBytes; |
342 | 2400 // otherwise, is there space in the current allocation region? |
2401 | |
2402 // We need to store the current allocation region in a local variable | |
2403 // here. The problem is that this method doesn't take any locks and | |
2404 // there may be other threads which overwrite the current allocation | |
2405 // region field. attempt_allocation(), for example, sets it to NULL | |
2406 // and this can happen *after* the NULL check here but before the call | |
2407 // to free(), resulting in a SIGSEGV. Note that this doesn't appear | |
2408 // to be a problem in the optimized build, since the two loads of the | |
2409 // current allocation region field are optimized away. | |
2433
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2410 HeapRegion* hr = _mutator_alloc_region.get(); |
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2411 if (hr == NULL) { |
342 | 2412 return 0; |
2413 } | |
2433
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|
2414 return hr->free(); |
342 | 2415 } |
2416 | |
1656
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|
2417 bool G1CollectedHeap::should_do_concurrent_full_gc(GCCause::Cause cause) { |
4910
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|
2418 switch (cause) { |
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|
2419 case GCCause::_gc_locker: return GCLockerInvokesConcurrent; |
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|
2420 case GCCause::_java_lang_system_gc: return ExplicitGCInvokesConcurrent; |
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2421 case GCCause::_g1_humongous_allocation: return true; |
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|
2422 default: return false; |
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|
2423 } |
1656
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|
2424 } |
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|
2425 |
3285
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|
2426 #ifndef PRODUCT |
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|
2427 void G1CollectedHeap::allocate_dummy_regions() { |
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|
2428 // Let's fill up most of the region |
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|
2429 size_t word_size = HeapRegion::GrainWords - 1024; |
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|
2430 // And as a result the region we'll allocate will be humongous. |
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|
2431 guarantee(isHumongous(word_size), "sanity"); |
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|
2432 |
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|
2433 for (uintx i = 0; i < G1DummyRegionsPerGC; ++i) { |
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|
2434 // Let's use the existing mechanism for the allocation |
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|
2435 HeapWord* dummy_obj = humongous_obj_allocate(word_size); |
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|
2436 if (dummy_obj != NULL) { |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2437 MemRegion mr(dummy_obj, word_size); |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2438 CollectedHeap::fill_with_object(mr); |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2439 } else { |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2440 // If we can't allocate once, we probably cannot allocate |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2441 // again. Let's get out of the loop. |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2442 break; |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2443 } |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2444 } |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2445 } |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2446 #endif // !PRODUCT |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2447 |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2448 void G1CollectedHeap::increment_old_marking_cycles_started() { |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2449 assert(_old_marking_cycles_started == _old_marking_cycles_completed || |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2450 _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
|
2451 err_msg("Wrong marking cycle count (started: %d, completed: %d)", |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2452 _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
|
2453 |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2454 _old_marking_cycles_started++; |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2455 } |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2456 |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2457 void G1CollectedHeap::increment_old_marking_cycles_completed(bool concurrent) { |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2458 MonitorLockerEx x(FullGCCount_lock, Mutex::_no_safepoint_check_flag); |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2459 |
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2460 // 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
|
2461 // 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
|
2462 // 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
|
2463 // assert here. |
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2464 |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2465 // 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
|
2466 // 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
|
2467 // interrupt a concurrent cycle), the number of full collections |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2468 // 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
|
2469 // 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
|
2470 // behind the number of full collections started. |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2471 |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2472 // 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
|
2473 assert(concurrent || |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2474 (_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
|
2475 (_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
|
2476 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
|
2477 "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
|
2478 _old_marking_cycles_started, _old_marking_cycles_completed)); |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2479 |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2480 // 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
|
2481 assert(!concurrent || |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2482 (_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
|
2483 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
|
2484 "_old_marking_cycles_started = %u " |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2485 "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
|
2486 _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
|
2487 |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2488 _old_marking_cycles_completed += 1; |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2489 |
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2490 // 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
|
2491 // we wake up any waiters (especially when ExplicitInvokesConcurrent |
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2492 // is set) so that if a waiter requests another System.gc() it doesn't |
10405 | 2493 // 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
|
2494 if (concurrent) { |
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2495 _cmThread->clear_in_progress(); |
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2496 } |
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2497 |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2498 // 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
|
2499 // System.gc() with (with ExplicitGCInvokesConcurrent set or not) |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2500 // 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
|
2501 // waiting in VM_G1IncCollectionPause::doit_epilogue(). |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2502 FullGCCount_lock->notify_all(); |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2503 } |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2504 |
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
2505 void G1CollectedHeap::register_concurrent_cycle_start(const Ticks& start_time) { |
10405 | 2506 _concurrent_cycle_started = true; |
2507 _gc_timer_cm->register_gc_start(start_time); | |
2508 | |
2509 _gc_tracer_cm->report_gc_start(gc_cause(), _gc_timer_cm->gc_start()); | |
2510 trace_heap_before_gc(_gc_tracer_cm); | |
2511 } | |
2512 | |
2513 void G1CollectedHeap::register_concurrent_cycle_end() { | |
2514 if (_concurrent_cycle_started) { | |
2515 if (_cm->has_aborted()) { | |
2516 _gc_tracer_cm->report_concurrent_mode_failure(); | |
2517 } | |
12179
f175e3678be2
8020692: TestGCEventMixed.java failed because of timestamp in event after end event
ehelin
parents:
12116
diff
changeset
|
2518 |
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
2519 _gc_timer_cm->register_gc_end(); |
10405 | 2520 _gc_tracer_cm->report_gc_end(_gc_timer_cm->gc_end(), _gc_timer_cm->time_partitions()); |
2521 | |
2522 _concurrent_cycle_started = false; | |
2523 } | |
2524 } | |
2525 | |
2526 void G1CollectedHeap::trace_heap_after_concurrent_cycle() { | |
2527 if (_concurrent_cycle_started) { | |
2528 trace_heap_after_gc(_gc_tracer_cm); | |
2529 } | |
2530 } | |
2531 | |
2532 G1YCType G1CollectedHeap::yc_type() { | |
2533 bool is_young = g1_policy()->gcs_are_young(); | |
2534 bool is_initial_mark = g1_policy()->during_initial_mark_pause(); | |
2535 bool is_during_mark = mark_in_progress(); | |
2536 | |
2537 if (is_initial_mark) { | |
2538 return InitialMark; | |
2539 } else if (is_during_mark) { | |
2540 return DuringMark; | |
2541 } else if (is_young) { | |
2542 return Normal; | |
2543 } else { | |
2544 return Mixed; | |
2545 } | |
2546 } | |
2547 | |
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2548 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
|
2549 assert_heap_not_locked(); |
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2550 |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2551 unsigned int gc_count_before; |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2552 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
|
2553 bool retry_gc; |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2554 |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2555 do { |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2556 retry_gc = false; |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2557 |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2558 { |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2559 MutexLocker ml(Heap_lock); |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2560 |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2561 // 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
|
2562 gc_count_before = total_collections(); |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2563 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
|
2564 } |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2565 |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2566 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
|
2567 // 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
|
2568 // 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
|
2569 // we are not requesting a post-GC allocation. |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2570 VM_G1IncCollectionPause op(gc_count_before, |
1973 | 2571 0, /* word_size */ |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2572 true, /* should_initiate_conc_mark */ |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2573 g1_policy()->max_pause_time_ms(), |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2574 cause); |
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2575 |
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2576 VMThread::execute(&op); |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2577 if (!op.pause_succeeded()) { |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2578 if (old_marking_count_before == _old_marking_cycles_started) { |
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2579 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
|
2580 } else { |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2581 // 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
|
2582 // 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
|
2583 // 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
|
2584 } |
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2585 |
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2586 if (retry_gc) { |
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2587 if (GC_locker::is_active_and_needs_gc()) { |
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2588 GC_locker::stall_until_clear(); |
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2589 } |
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2590 } |
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2591 } |
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2592 } else { |
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2593 if (cause == GCCause::_gc_locker |
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2594 DEBUG_ONLY(|| cause == GCCause::_scavenge_alot)) { |
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2595 |
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2596 // Schedule a standard evacuation pause. We're setting word_size |
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2597 // to 0 which means that we are not requesting a post-GC allocation. |
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2598 VM_G1IncCollectionPause op(gc_count_before, |
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2599 0, /* word_size */ |
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2600 false, /* should_initiate_conc_mark */ |
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2601 g1_policy()->max_pause_time_ms(), |
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2602 cause); |
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2603 VMThread::execute(&op); |
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2604 } else { |
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2605 // Schedule a Full GC. |
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2606 VM_G1CollectFull op(gc_count_before, old_marking_count_before, cause); |
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2607 VMThread::execute(&op); |
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2608 } |
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2609 } |
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2610 } while (retry_gc); |
342 | 2611 } |
2612 | |
2613 bool G1CollectedHeap::is_in(const void* p) const { | |
4708 | 2614 if (_g1_committed.contains(p)) { |
2615 // Given that we know that p is in the committed space, | |
2616 // heap_region_containing_raw() should successfully | |
2617 // return the containing region. | |
2618 HeapRegion* hr = heap_region_containing_raw(p); | |
342 | 2619 return hr->is_in(p); |
2620 } else { | |
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2621 return false; |
342 | 2622 } |
2623 } | |
2624 | |
2625 // Iteration functions. | |
2626 | |
2627 // Iterates an OopClosure over all ref-containing fields of objects | |
2628 // within a HeapRegion. | |
2629 | |
2630 class IterateOopClosureRegionClosure: public HeapRegionClosure { | |
2631 MemRegion _mr; | |
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2632 ExtendedOopClosure* _cl; |
342 | 2633 public: |
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2634 IterateOopClosureRegionClosure(MemRegion mr, ExtendedOopClosure* cl) |
342 | 2635 : _mr(mr), _cl(cl) {} |
2636 bool doHeapRegion(HeapRegion* r) { | |
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2637 if (!r->continuesHumongous()) { |
342 | 2638 r->oop_iterate(_cl); |
2639 } | |
2640 return false; | |
2641 } | |
2642 }; | |
2643 | |
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2644 void G1CollectedHeap::oop_iterate(ExtendedOopClosure* cl) { |
342 | 2645 IterateOopClosureRegionClosure blk(_g1_committed, cl); |
3766 | 2646 heap_region_iterate(&blk); |
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2647 } |
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2648 |
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2649 void G1CollectedHeap::oop_iterate(MemRegion mr, ExtendedOopClosure* cl) { |
342 | 2650 IterateOopClosureRegionClosure blk(mr, cl); |
3766 | 2651 heap_region_iterate(&blk); |
342 | 2652 } |
2653 | |
2654 // Iterates an ObjectClosure over all objects within a HeapRegion. | |
2655 | |
2656 class IterateObjectClosureRegionClosure: public HeapRegionClosure { | |
2657 ObjectClosure* _cl; | |
2658 public: | |
2659 IterateObjectClosureRegionClosure(ObjectClosure* cl) : _cl(cl) {} | |
2660 bool doHeapRegion(HeapRegion* r) { | |
2661 if (! r->continuesHumongous()) { | |
2662 r->object_iterate(_cl); | |
2663 } | |
2664 return false; | |
2665 } | |
2666 }; | |
2667 | |
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2668 void G1CollectedHeap::object_iterate(ObjectClosure* cl) { |
342 | 2669 IterateObjectClosureRegionClosure blk(cl); |
3766 | 2670 heap_region_iterate(&blk); |
342 | 2671 } |
2672 | |
2673 // Calls a SpaceClosure on a HeapRegion. | |
2674 | |
2675 class SpaceClosureRegionClosure: public HeapRegionClosure { | |
2676 SpaceClosure* _cl; | |
2677 public: | |
2678 SpaceClosureRegionClosure(SpaceClosure* cl) : _cl(cl) {} | |
2679 bool doHeapRegion(HeapRegion* r) { | |
2680 _cl->do_space(r); | |
2681 return false; | |
2682 } | |
2683 }; | |
2684 | |
2685 void G1CollectedHeap::space_iterate(SpaceClosure* cl) { | |
2686 SpaceClosureRegionClosure blk(cl); | |
3766 | 2687 heap_region_iterate(&blk); |
342 | 2688 } |
2689 | |
3766 | 2690 void G1CollectedHeap::heap_region_iterate(HeapRegionClosure* cl) const { |
2691 _hrs.iterate(cl); | |
342 | 2692 } |
2693 | |
2694 void | |
2695 G1CollectedHeap::heap_region_par_iterate_chunked(HeapRegionClosure* cl, | |
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2696 uint worker_id, |
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2697 uint no_of_par_workers, |
342 | 2698 jint claim_value) { |
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2699 const uint regions = n_regions(); |
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2700 const uint max_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
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2701 no_of_par_workers : |
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2702 1); |
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|
2703 assert(UseDynamicNumberOfGCThreads || |
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2704 no_of_par_workers == workers()->total_workers(), |
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2705 "Non dynamic should use fixed number of workers"); |
355 | 2706 // try to spread out the starting points of the workers |
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2707 const HeapRegion* start_hr = |
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2708 start_region_for_worker(worker_id, no_of_par_workers); |
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2709 const uint start_index = start_hr->hrs_index(); |
355 | 2710 |
2711 // each worker will actually look at all regions | |
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2712 for (uint count = 0; count < regions; ++count) { |
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2713 const uint index = (start_index + count) % regions; |
355 | 2714 assert(0 <= index && index < regions, "sanity"); |
2715 HeapRegion* r = region_at(index); | |
2716 // we'll ignore "continues humongous" regions (we'll process them | |
2717 // when we come across their corresponding "start humongous" | |
2718 // region) and regions already claimed | |
2719 if (r->claim_value() == claim_value || r->continuesHumongous()) { | |
2720 continue; | |
2721 } | |
2722 // OK, try to claim it | |
342 | 2723 if (r->claimHeapRegion(claim_value)) { |
355 | 2724 // success! |
2725 assert(!r->continuesHumongous(), "sanity"); | |
2726 if (r->startsHumongous()) { | |
2727 // If the region is "starts humongous" we'll iterate over its | |
2728 // "continues humongous" first; in fact we'll do them | |
2729 // first. The order is important. In on case, calling the | |
2730 // closure on the "starts humongous" region might de-allocate | |
2731 // and clear all its "continues humongous" regions and, as a | |
2732 // result, we might end up processing them twice. So, we'll do | |
2733 // them first (notice: most closures will ignore them anyway) and | |
2734 // then we'll do the "starts humongous" region. | |
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2735 for (uint ch_index = index + 1; ch_index < regions; ++ch_index) { |
355 | 2736 HeapRegion* chr = region_at(ch_index); |
2737 | |
2738 // if the region has already been claimed or it's not | |
2739 // "continues humongous" we're done | |
2740 if (chr->claim_value() == claim_value || | |
2741 !chr->continuesHumongous()) { | |
2742 break; | |
2743 } | |
2744 | |
10405 | 2745 // No one should have claimed it directly. We can given |
355 | 2746 // that we claimed its "starts humongous" region. |
2747 assert(chr->claim_value() != claim_value, "sanity"); | |
2748 assert(chr->humongous_start_region() == r, "sanity"); | |
2749 | |
2750 if (chr->claimHeapRegion(claim_value)) { | |
10405 | 2751 // we should always be able to claim it; no one else should |
355 | 2752 // be trying to claim this region |
2753 | |
2754 bool res2 = cl->doHeapRegion(chr); | |
2755 assert(!res2, "Should not abort"); | |
2756 | |
2757 // Right now, this holds (i.e., no closure that actually | |
2758 // does something with "continues humongous" regions | |
2759 // clears them). We might have to weaken it in the future, | |
2760 // but let's leave these two asserts here for extra safety. | |
2761 assert(chr->continuesHumongous(), "should still be the case"); | |
2762 assert(chr->humongous_start_region() == r, "sanity"); | |
2763 } else { | |
2764 guarantee(false, "we should not reach here"); | |
2765 } | |
2766 } | |
2767 } | |
2768 | |
2769 assert(!r->continuesHumongous(), "sanity"); | |
2770 bool res = cl->doHeapRegion(r); | |
2771 assert(!res, "Should not abort"); | |
2772 } | |
2773 } | |
2774 } | |
2775 | |
390 | 2776 class ResetClaimValuesClosure: public HeapRegionClosure { |
2777 public: | |
2778 bool doHeapRegion(HeapRegion* r) { | |
2779 r->set_claim_value(HeapRegion::InitialClaimValue); | |
2780 return false; | |
2781 } | |
2782 }; | |
2783 | |
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2784 void G1CollectedHeap::reset_heap_region_claim_values() { |
390 | 2785 ResetClaimValuesClosure blk; |
2786 heap_region_iterate(&blk); | |
2787 } | |
2788 | |
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2789 void G1CollectedHeap::reset_cset_heap_region_claim_values() { |
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2790 ResetClaimValuesClosure blk; |
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2791 collection_set_iterate(&blk); |
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2792 } |
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2793 |
355 | 2794 #ifdef ASSERT |
2795 // This checks whether all regions in the heap have the correct claim | |
2796 // value. I also piggy-backed on this a check to ensure that the | |
2797 // humongous_start_region() information on "continues humongous" | |
2798 // regions is correct. | |
2799 | |
2800 class CheckClaimValuesClosure : public HeapRegionClosure { | |
2801 private: | |
2802 jint _claim_value; | |
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2803 uint _failures; |
355 | 2804 HeapRegion* _sh_region; |
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2805 |
355 | 2806 public: |
2807 CheckClaimValuesClosure(jint claim_value) : | |
2808 _claim_value(claim_value), _failures(0), _sh_region(NULL) { } | |
2809 bool doHeapRegion(HeapRegion* r) { | |
2810 if (r->claim_value() != _claim_value) { | |
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2811 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
355 | 2812 "claim value = %d, should be %d", |
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2813 HR_FORMAT_PARAMS(r), |
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2814 r->claim_value(), _claim_value); |
355 | 2815 ++_failures; |
2816 } | |
2817 if (!r->isHumongous()) { | |
2818 _sh_region = NULL; | |
2819 } else if (r->startsHumongous()) { | |
2820 _sh_region = r; | |
2821 } else if (r->continuesHumongous()) { | |
2822 if (r->humongous_start_region() != _sh_region) { | |
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2823 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
355 | 2824 "HS = "PTR_FORMAT", should be "PTR_FORMAT, |
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2825 HR_FORMAT_PARAMS(r), |
355 | 2826 r->humongous_start_region(), |
2827 _sh_region); | |
2828 ++_failures; | |
342 | 2829 } |
2830 } | |
355 | 2831 return false; |
2832 } | |
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2833 uint failures() { return _failures; } |
355 | 2834 }; |
2835 | |
2836 bool G1CollectedHeap::check_heap_region_claim_values(jint claim_value) { | |
2837 CheckClaimValuesClosure cl(claim_value); | |
2838 heap_region_iterate(&cl); | |
2839 return cl.failures() == 0; | |
2840 } | |
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2841 |
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2842 class CheckClaimValuesInCSetHRClosure: public HeapRegionClosure { |
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2843 private: |
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2844 jint _claim_value; |
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2845 uint _failures; |
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2846 |
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2847 public: |
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2848 CheckClaimValuesInCSetHRClosure(jint claim_value) : |
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2849 _claim_value(claim_value), _failures(0) { } |
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2850 |
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2851 uint failures() { return _failures; } |
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2852 |
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2853 bool doHeapRegion(HeapRegion* hr) { |
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2854 assert(hr->in_collection_set(), "how?"); |
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2855 assert(!hr->isHumongous(), "H-region in CSet"); |
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2856 if (hr->claim_value() != _claim_value) { |
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2857 gclog_or_tty->print_cr("CSet Region " HR_FORMAT ", " |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2858 "claim value = %d, should be %d", |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2859 HR_FORMAT_PARAMS(hr), |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2860 hr->claim_value(), _claim_value); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2861 _failures += 1; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2862 } |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2863 return false; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2864 } |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2865 }; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2866 |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2867 bool G1CollectedHeap::check_cset_heap_region_claim_values(jint claim_value) { |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2868 CheckClaimValuesInCSetHRClosure cl(claim_value); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2869 collection_set_iterate(&cl); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2870 return cl.failures() == 0; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2871 } |
355 | 2872 #endif // ASSERT |
342 | 2873 |
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2874 // Clear the cached CSet starting regions and (more importantly) |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2875 // the time stamps. Called when we reset the GC time stamp. |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2876 void G1CollectedHeap::clear_cset_start_regions() { |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2877 assert(_worker_cset_start_region != NULL, "sanity"); |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2878 assert(_worker_cset_start_region_time_stamp != NULL, "sanity"); |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2879 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2880 int n_queues = MAX2((int)ParallelGCThreads, 1); |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2881 for (int i = 0; i < n_queues; i++) { |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2882 _worker_cset_start_region[i] = NULL; |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2883 _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
|
2884 } |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2885 } |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2886 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2887 // 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
|
2888 // starting region for iterating over the current collection set. |
17844
8847586c9037
8016302: Change type of the number of GC workers to unsigned int (2)
vkempik
parents:
17833
diff
changeset
|
2889 HeapRegion* G1CollectedHeap::start_cset_region_for_worker(uint worker_i) { |
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2890 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
|
2891 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2892 HeapRegion* result = NULL; |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2893 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
|
2894 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2895 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
|
2896 // 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
|
2897 // 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
|
2898 // 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
|
2899 // (when the collection set is empty). |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2900 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
|
2901 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
|
2902 return result; |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2903 } |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2904 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2905 // 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
|
2906 // 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
|
2907 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2908 // 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
|
2909 // 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
|
2910 // avoid contention. |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2911 // If we have: |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2912 // n collection set regions |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2913 // p threads |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2914 // 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
|
2915 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2916 result = g1_policy()->collection_set(); |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2917 if (G1CollectedHeap::use_parallel_gc_threads()) { |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2918 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
|
2919 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
|
2920 assert(UseDynamicNumberOfGCThreads || |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2921 active_workers == workers()->total_workers(), |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2922 "Unless dynamic should use total workers"); |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2923 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2924 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
|
2925 uint start_ind = 0; |
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2926 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2927 if (worker_i > 0 && |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2928 _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
|
2929 // Previous workers starting region is valid |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2930 // so let's iterate from there |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2931 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
|
2932 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
|
2933 } |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2934 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2935 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
|
2936 result = result->next_in_collection_set(); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2937 } |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2938 } |
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2939 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2940 // 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
|
2941 // (when the collection set is empty). |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2942 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
|
2943 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
|
2944 "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
|
2945 _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
|
2946 OrderAccess::storestore(); |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2947 _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
|
2948 return result; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2949 } |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2950 |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2951 HeapRegion* G1CollectedHeap::start_region_for_worker(uint worker_i, |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2952 uint no_of_par_workers) { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2953 uint worker_num = |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2954 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
|
2955 assert(UseDynamicNumberOfGCThreads || |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2956 no_of_par_workers == workers()->total_workers(), |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2957 "Non dynamic should use fixed number of workers"); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2958 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
|
2959 return region_at(start_index); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2960 } |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2961 |
342 | 2962 void G1CollectedHeap::collection_set_iterate(HeapRegionClosure* cl) { |
2963 HeapRegion* r = g1_policy()->collection_set(); | |
2964 while (r != NULL) { | |
2965 HeapRegion* next = r->next_in_collection_set(); | |
2966 if (cl->doHeapRegion(r)) { | |
2967 cl->incomplete(); | |
2968 return; | |
2969 } | |
2970 r = next; | |
2971 } | |
2972 } | |
2973 | |
2974 void G1CollectedHeap::collection_set_iterate_from(HeapRegion* r, | |
2975 HeapRegionClosure *cl) { | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2976 if (r == NULL) { |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2977 // 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
|
2978 return; |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2979 } |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2980 |
342 | 2981 assert(r->in_collection_set(), |
2982 "Start region must be a member of the collection set."); | |
2983 HeapRegion* cur = r; | |
2984 while (cur != NULL) { | |
2985 HeapRegion* next = cur->next_in_collection_set(); | |
2986 if (cl->doHeapRegion(cur) && false) { | |
2987 cl->incomplete(); | |
2988 return; | |
2989 } | |
2990 cur = next; | |
2991 } | |
2992 cur = g1_policy()->collection_set(); | |
2993 while (cur != r) { | |
2994 HeapRegion* next = cur->next_in_collection_set(); | |
2995 if (cl->doHeapRegion(cur) && false) { | |
2996 cl->incomplete(); | |
2997 return; | |
2998 } | |
2999 cur = next; | |
3000 } | |
3001 } | |
3002 | |
3003 CompactibleSpace* G1CollectedHeap::first_compactible_space() { | |
3766 | 3004 return n_regions() > 0 ? region_at(0) : NULL; |
342 | 3005 } |
3006 | |
3007 | |
3008 Space* G1CollectedHeap::space_containing(const void* addr) const { | |
3009 Space* res = heap_region_containing(addr); | |
3010 return res; | |
3011 } | |
3012 | |
3013 HeapWord* G1CollectedHeap::block_start(const void* addr) const { | |
3014 Space* sp = space_containing(addr); | |
3015 if (sp != NULL) { | |
3016 return sp->block_start(addr); | |
3017 } | |
3018 return NULL; | |
3019 } | |
3020 | |
3021 size_t G1CollectedHeap::block_size(const HeapWord* addr) const { | |
3022 Space* sp = space_containing(addr); | |
3023 assert(sp != NULL, "block_size of address outside of heap"); | |
3024 return sp->block_size(addr); | |
3025 } | |
3026 | |
3027 bool G1CollectedHeap::block_is_obj(const HeapWord* addr) const { | |
3028 Space* sp = space_containing(addr); | |
3029 return sp->block_is_obj(addr); | |
3030 } | |
3031 | |
3032 bool G1CollectedHeap::supports_tlab_allocation() const { | |
3033 return true; | |
3034 } | |
3035 | |
3036 size_t G1CollectedHeap::tlab_capacity(Thread* ignored) const { | |
17727 | 3037 return (_g1_policy->young_list_target_length() - young_list()->survivor_length()) * HeapRegion::GrainBytes; |
3038 } | |
3039 | |
3040 size_t G1CollectedHeap::tlab_used(Thread* ignored) const { | |
3041 return young_list()->eden_used_bytes(); | |
3042 } | |
3043 | |
3044 // For G1 TLABs should not contain humongous objects, so the maximum TLAB size | |
3045 // must be smaller than the humongous object limit. | |
3046 size_t G1CollectedHeap::max_tlab_size() const { | |
3047 return align_size_down(_humongous_object_threshold_in_words - 1, MinObjAlignment); | |
342 | 3048 } |
3049 | |
3050 size_t G1CollectedHeap::unsafe_max_tlab_alloc(Thread* ignored) const { | |
3051 // Return the remaining space in the cur alloc region, but not less than | |
3052 // the min TLAB size. | |
1313
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3053 |
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|
3054 // Also, this value can be at most the humongous object threshold, |
10405 | 3055 // since we can't allow tlabs to grow big enough to accommodate |
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3056 // humongous objects. |
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3057 |
2433
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3058 HeapRegion* hr = _mutator_alloc_region.get(); |
17727 | 3059 size_t max_tlab = max_tlab_size() * wordSize; |
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3060 if (hr == NULL) { |
17727 | 3061 return max_tlab; |
342 | 3062 } else { |
17727 | 3063 return MIN2(MAX2(hr->free(), (size_t) MinTLABSize), max_tlab); |
342 | 3064 } |
3065 } | |
3066 | |
3067 size_t G1CollectedHeap::max_capacity() const { | |
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3068 return _g1_reserved.byte_size(); |
342 | 3069 } |
3070 | |
3071 jlong G1CollectedHeap::millis_since_last_gc() { | |
3072 // assert(false, "NYI"); | |
3073 return 0; | |
3074 } | |
3075 | |
3076 void G1CollectedHeap::prepare_for_verify() { | |
3077 if (SafepointSynchronize::is_at_safepoint() || ! UseTLAB) { | |
3078 ensure_parsability(false); | |
3079 } | |
3080 g1_rem_set()->prepare_for_verify(); | |
3081 } | |
3082 | |
6254
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3083 bool G1CollectedHeap::allocated_since_marking(oop obj, HeapRegion* hr, |
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3084 VerifyOption vo) { |
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3085 switch (vo) { |
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3086 case VerifyOption_G1UsePrevMarking: |
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3087 return hr->obj_allocated_since_prev_marking(obj); |
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3088 case VerifyOption_G1UseNextMarking: |
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3089 return hr->obj_allocated_since_next_marking(obj); |
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3090 case VerifyOption_G1UseMarkWord: |
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3091 return false; |
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|
3092 default: |
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|
3093 ShouldNotReachHere(); |
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3094 } |
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3095 return false; // keep some compilers happy |
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|
3096 } |
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3097 |
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3098 HeapWord* G1CollectedHeap::top_at_mark_start(HeapRegion* hr, VerifyOption vo) { |
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3099 switch (vo) { |
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3100 case VerifyOption_G1UsePrevMarking: return hr->prev_top_at_mark_start(); |
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3101 case VerifyOption_G1UseNextMarking: return hr->next_top_at_mark_start(); |
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3102 case VerifyOption_G1UseMarkWord: return NULL; |
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3103 default: ShouldNotReachHere(); |
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3104 } |
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3105 return NULL; // keep some compilers happy |
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3106 } |
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3107 |
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3108 bool G1CollectedHeap::is_marked(oop obj, VerifyOption vo) { |
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3109 switch (vo) { |
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3110 case VerifyOption_G1UsePrevMarking: return isMarkedPrev(obj); |
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3111 case VerifyOption_G1UseNextMarking: return isMarkedNext(obj); |
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3112 case VerifyOption_G1UseMarkWord: return obj->is_gc_marked(); |
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3113 default: ShouldNotReachHere(); |
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3114 } |
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3115 return false; // keep some compilers happy |
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3116 } |
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3117 |
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3118 const char* G1CollectedHeap::top_at_mark_start_str(VerifyOption vo) { |
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3119 switch (vo) { |
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3120 case VerifyOption_G1UsePrevMarking: return "PTAMS"; |
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3121 case VerifyOption_G1UseNextMarking: return "NTAMS"; |
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3122 case VerifyOption_G1UseMarkWord: return "NONE"; |
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3123 default: ShouldNotReachHere(); |
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|
3124 } |
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3125 return NULL; // keep some compilers happy |
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|
3126 } |
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|
3127 |
17636
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|
3128 class VerifyRootsClosure: public OopClosure { |
12080 | 3129 private: |
3130 G1CollectedHeap* _g1h; | |
3131 VerifyOption _vo; | |
3132 bool _failures; | |
3133 public: | |
3134 // _vo == UsePrevMarking -> use "prev" marking information, | |
3135 // _vo == UseNextMarking -> use "next" marking information, | |
3136 // _vo == UseMarkWord -> use mark word from object header. | |
3137 VerifyRootsClosure(VerifyOption vo) : | |
3138 _g1h(G1CollectedHeap::heap()), | |
3139 _vo(vo), | |
3140 _failures(false) { } | |
3141 | |
3142 bool failures() { return _failures; } | |
3143 | |
3144 template <class T> void do_oop_nv(T* p) { | |
3145 T heap_oop = oopDesc::load_heap_oop(p); | |
3146 if (!oopDesc::is_null(heap_oop)) { | |
3147 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
3148 if (_g1h->is_obj_dead_cond(obj, _vo)) { | |
3149 gclog_or_tty->print_cr("Root location "PTR_FORMAT" " | |
3150 "points to dead obj "PTR_FORMAT, p, (void*) obj); | |
3151 if (_vo == VerifyOption_G1UseMarkWord) { | |
3152 gclog_or_tty->print_cr(" Mark word: "PTR_FORMAT, (void*)(obj->mark())); | |
3153 } | |
3154 obj->print_on(gclog_or_tty); | |
3155 _failures = true; | |
3156 } | |
3157 } | |
3158 } | |
3159 | |
3160 void do_oop(oop* p) { do_oop_nv(p); } | |
3161 void do_oop(narrowOop* p) { do_oop_nv(p); } | |
3162 }; | |
3163 | |
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3164 class G1VerifyCodeRootOopClosure: public OopClosure { |
12080 | 3165 G1CollectedHeap* _g1h; |
3166 OopClosure* _root_cl; | |
3167 nmethod* _nm; | |
3168 VerifyOption _vo; | |
3169 bool _failures; | |
3170 | |
3171 template <class T> void do_oop_work(T* p) { | |
3172 // First verify that this root is live | |
3173 _root_cl->do_oop(p); | |
3174 | |
3175 if (!G1VerifyHeapRegionCodeRoots) { | |
3176 // We're not verifying the code roots attached to heap region. | |
3177 return; | |
3178 } | |
3179 | |
3180 // Don't check the code roots during marking verification in a full GC | |
3181 if (_vo == VerifyOption_G1UseMarkWord) { | |
3182 return; | |
3183 } | |
3184 | |
3185 // Now verify that the current nmethod (which contains p) is | |
3186 // in the code root list of the heap region containing the | |
3187 // object referenced by p. | |
3188 | |
3189 T heap_oop = oopDesc::load_heap_oop(p); | |
3190 if (!oopDesc::is_null(heap_oop)) { | |
3191 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
3192 | |
3193 // Now fetch the region containing the object | |
3194 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
3195 HeapRegionRemSet* hrrs = hr->rem_set(); | |
3196 // Verify that the strong code root list for this region | |
3197 // contains the nmethod | |
3198 if (!hrrs->strong_code_roots_list_contains(_nm)) { | |
3199 gclog_or_tty->print_cr("Code root location "PTR_FORMAT" " | |
3200 "from nmethod "PTR_FORMAT" not in strong " | |
3201 "code roots for region ["PTR_FORMAT","PTR_FORMAT")", | |
3202 p, _nm, hr->bottom(), hr->end()); | |
3203 _failures = true; | |
3204 } | |
3205 } | |
3206 } | |
3207 | |
3208 public: | |
3209 G1VerifyCodeRootOopClosure(G1CollectedHeap* g1h, OopClosure* root_cl, VerifyOption vo): | |
3210 _g1h(g1h), _root_cl(root_cl), _vo(vo), _nm(NULL), _failures(false) {} | |
3211 | |
3212 void do_oop(oop* p) { do_oop_work(p); } | |
3213 void do_oop(narrowOop* p) { do_oop_work(p); } | |
3214 | |
3215 void set_nmethod(nmethod* nm) { _nm = nm; } | |
3216 bool failures() { return _failures; } | |
3217 }; | |
3218 | |
3219 class G1VerifyCodeRootBlobClosure: public CodeBlobClosure { | |
3220 G1VerifyCodeRootOopClosure* _oop_cl; | |
3221 | |
3222 public: | |
3223 G1VerifyCodeRootBlobClosure(G1VerifyCodeRootOopClosure* oop_cl): | |
3224 _oop_cl(oop_cl) {} | |
3225 | |
3226 void do_code_blob(CodeBlob* cb) { | |
3227 nmethod* nm = cb->as_nmethod_or_null(); | |
3228 if (nm != NULL) { | |
3229 _oop_cl->set_nmethod(nm); | |
3230 nm->oops_do(_oop_cl); | |
3231 } | |
3232 } | |
3233 }; | |
3234 | |
3235 class YoungRefCounterClosure : public OopClosure { | |
3236 G1CollectedHeap* _g1h; | |
3237 int _count; | |
3238 public: | |
3239 YoungRefCounterClosure(G1CollectedHeap* g1h) : _g1h(g1h), _count(0) {} | |
3240 void do_oop(oop* p) { if (_g1h->is_in_young(*p)) { _count++; } } | |
3241 void do_oop(narrowOop* p) { ShouldNotReachHere(); } | |
3242 | |
3243 int count() { return _count; } | |
3244 void reset_count() { _count = 0; }; | |
3245 }; | |
3246 | |
3247 class VerifyKlassClosure: public KlassClosure { | |
3248 YoungRefCounterClosure _young_ref_counter_closure; | |
3249 OopClosure *_oop_closure; | |
3250 public: | |
3251 VerifyKlassClosure(G1CollectedHeap* g1h, OopClosure* cl) : _young_ref_counter_closure(g1h), _oop_closure(cl) {} | |
3252 void do_klass(Klass* k) { | |
3253 k->oops_do(_oop_closure); | |
3254 | |
3255 _young_ref_counter_closure.reset_count(); | |
3256 k->oops_do(&_young_ref_counter_closure); | |
3257 if (_young_ref_counter_closure.count() > 0) { | |
3258 guarantee(k->has_modified_oops(), err_msg("Klass %p, has young refs but is not dirty.", k)); | |
3259 } | |
3260 } | |
3261 }; | |
3262 | |
342 | 3263 class VerifyLivenessOopClosure: public OopClosure { |
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3264 G1CollectedHeap* _g1h; |
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3265 VerifyOption _vo; |
342 | 3266 public: |
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3267 VerifyLivenessOopClosure(G1CollectedHeap* g1h, VerifyOption vo): |
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3268 _g1h(g1h), _vo(vo) |
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3269 { } |
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|
3270 void do_oop(narrowOop *p) { do_oop_work(p); } |
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3271 void do_oop( oop *p) { do_oop_work(p); } |
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|
3272 |
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|
3273 template <class T> void do_oop_work(T *p) { |
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3274 oop obj = oopDesc::load_decode_heap_oop(p); |
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|
3275 guarantee(obj == NULL || !_g1h->is_obj_dead_cond(obj, _vo), |
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|
3276 "Dead object referenced by a not dead object"); |
342 | 3277 } |
3278 }; | |
3279 | |
3280 class VerifyObjsInRegionClosure: public ObjectClosure { | |
811 | 3281 private: |
342 | 3282 G1CollectedHeap* _g1h; |
3283 size_t _live_bytes; | |
3284 HeapRegion *_hr; | |
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|
3285 VerifyOption _vo; |
342 | 3286 public: |
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|
3287 // _vo == UsePrevMarking -> use "prev" marking information, |
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|
3288 // _vo == UseNextMarking -> use "next" marking information, |
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|
3289 // _vo == UseMarkWord -> use mark word from object header. |
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|
3290 VerifyObjsInRegionClosure(HeapRegion *hr, VerifyOption vo) |
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3291 : _live_bytes(0), _hr(hr), _vo(vo) { |
342 | 3292 _g1h = G1CollectedHeap::heap(); |
3293 } | |
3294 void do_object(oop o) { | |
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|
3295 VerifyLivenessOopClosure isLive(_g1h, _vo); |
342 | 3296 assert(o != NULL, "Huh?"); |
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3297 if (!_g1h->is_obj_dead_cond(o, _vo)) { |
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3298 // If the object is alive according to the mark word, |
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|
3299 // then verify that the marking information agrees. |
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3300 // Note we can't verify the contra-positive of the |
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3301 // above: if the object is dead (according to the mark |
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3302 // word), it may not be marked, or may have been marked |
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7004681: G1: Extend marking verification to Full GCs
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3303 // but has since became dead, or may have been allocated |
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|
3304 // since the last marking. |
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|
3305 if (_vo == VerifyOption_G1UseMarkWord) { |
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|
3306 guarantee(!_g1h->is_obj_dead(o), "mark word and concurrent mark mismatch"); |
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7004681: G1: Extend marking verification to Full GCs
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|
3307 } |
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|
3308 |
6725
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|
3309 o->oop_iterate_no_header(&isLive); |
1389
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|
3310 if (!_hr->obj_allocated_since_prev_marking(o)) { |
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3311 size_t obj_size = o->size(); // Make sure we don't overflow |
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3312 _live_bytes += (obj_size * HeapWordSize); |
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|
3313 } |
342 | 3314 } |
3315 } | |
3316 size_t live_bytes() { return _live_bytes; } | |
3317 }; | |
3318 | |
3319 class PrintObjsInRegionClosure : public ObjectClosure { | |
3320 HeapRegion *_hr; | |
3321 G1CollectedHeap *_g1; | |
3322 public: | |
3323 PrintObjsInRegionClosure(HeapRegion *hr) : _hr(hr) { | |
3324 _g1 = G1CollectedHeap::heap(); | |
3325 }; | |
3326 | |
3327 void do_object(oop o) { | |
3328 if (o != NULL) { | |
3329 HeapWord *start = (HeapWord *) o; | |
3330 size_t word_sz = o->size(); | |
3331 gclog_or_tty->print("\nPrinting obj "PTR_FORMAT" of size " SIZE_FORMAT | |
3332 " isMarkedPrev %d isMarkedNext %d isAllocSince %d\n", | |
3333 (void*) o, word_sz, | |
3334 _g1->isMarkedPrev(o), | |
3335 _g1->isMarkedNext(o), | |
3336 _hr->obj_allocated_since_prev_marking(o)); | |
3337 HeapWord *end = start + word_sz; | |
3338 HeapWord *cur; | |
3339 int *val; | |
3340 for (cur = start; cur < end; cur++) { | |
3341 val = (int *) cur; | |
3342 gclog_or_tty->print("\t "PTR_FORMAT":"PTR_FORMAT"\n", val, *val); | |
3343 } | |
3344 } | |
3345 } | |
3346 }; | |
3347 | |
3348 class VerifyRegionClosure: public HeapRegionClosure { | |
811 | 3349 private: |
6254
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3350 bool _par; |
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|
3351 VerifyOption _vo; |
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|
3352 bool _failures; |
811 | 3353 public: |
3772
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3354 // _vo == UsePrevMarking -> use "prev" marking information, |
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3355 // _vo == UseNextMarking -> use "next" marking information, |
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3356 // _vo == UseMarkWord -> use mark word from object header. |
6008 | 3357 VerifyRegionClosure(bool par, VerifyOption vo) |
3358 : _par(par), | |
3772
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|
3359 _vo(vo), |
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|
3360 _failures(false) {} |
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|
3361 |
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|
3362 bool failures() { |
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|
3363 return _failures; |
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|
3364 } |
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|
3365 |
342 | 3366 bool doHeapRegion(HeapRegion* r) { |
637
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|
3367 if (!r->continuesHumongous()) { |
1020
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|
3368 bool failures = false; |
6008 | 3369 r->verify(_vo, &failures); |
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|
3370 if (failures) { |
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|
3371 _failures = true; |
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|
3372 } else { |
3772
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|
3373 VerifyObjsInRegionClosure not_dead_yet_cl(r, _vo); |
1020
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|
3374 r->object_iterate(¬_dead_yet_cl); |
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|
3375 if (_vo != VerifyOption_G1UseNextMarking) { |
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|
3376 if (r->max_live_bytes() < not_dead_yet_cl.live_bytes()) { |
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|
3377 gclog_or_tty->print_cr("["PTR_FORMAT","PTR_FORMAT"] " |
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|
3378 "max_live_bytes "SIZE_FORMAT" " |
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diff
changeset
|
3379 "< calculated "SIZE_FORMAT, |
2ace1c4ee8da
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diff
changeset
|
3380 r->bottom(), r->end(), |
2ace1c4ee8da
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|
3381 r->max_live_bytes(), |
1020
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|
3382 not_dead_yet_cl.live_bytes()); |
4787
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diff
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|
3383 _failures = true; |
2ace1c4ee8da
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diff
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|
3384 } |
2ace1c4ee8da
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diff
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|
3385 } else { |
2ace1c4ee8da
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diff
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|
3386 // When vo == UseNextMarking we cannot currently do a sanity |
2ace1c4ee8da
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diff
changeset
|
3387 // check on the live bytes as the calculation has not been |
2ace1c4ee8da
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diff
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|
3388 // finalized yet. |
1020
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|
3389 } |
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|
3390 } |
342 | 3391 } |
1020
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|
3392 return false; // stop the region iteration if we hit a failure |
342 | 3393 } |
3394 }; | |
3395 | |
12080 | 3396 // This is the task used for parallel verification of the heap regions |
390 | 3397 |
3398 class G1ParVerifyTask: public AbstractGangTask { | |
3399 private: | |
3400 G1CollectedHeap* _g1h; | |
3772
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7004681: G1: Extend marking verification to Full GCs
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|
3401 VerifyOption _vo; |
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|
3402 bool _failures; |
390 | 3403 |
3404 public: | |
3772
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|
3405 // _vo == UsePrevMarking -> use "prev" marking information, |
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|
3406 // _vo == UseNextMarking -> use "next" marking information, |
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|
3407 // _vo == UseMarkWord -> use mark word from object header. |
6008 | 3408 G1ParVerifyTask(G1CollectedHeap* g1h, VerifyOption vo) : |
390 | 3409 AbstractGangTask("Parallel verify task"), |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
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|
3410 _g1h(g1h), |
3772
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|
3411 _vo(vo), |
1020
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diff
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|
3412 _failures(false) { } |
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|
3413 |
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|
3414 bool failures() { |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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parents:
1019
diff
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|
3415 return _failures; |
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diff
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|
3416 } |
390 | 3417 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
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4711
diff
changeset
|
3418 void work(uint worker_id) { |
637
25e146966e7c
6817419: G1: Enable extensive verification for humongous regions
iveresov
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diff
changeset
|
3419 HandleMark hm; |
6008 | 3420 VerifyRegionClosure blk(true, _vo); |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
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|
3421 _g1h->heap_region_par_iterate_chunked(&blk, worker_id, |
4095
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diff
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|
3422 _g1h->workers()->active_workers(), |
390 | 3423 HeapRegion::ParVerifyClaimValue); |
1020
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6882730: G1: parallel heap verification messes up region dump
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1019
diff
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|
3424 if (blk.failures()) { |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3425 _failures = true; |
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1019
diff
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|
3426 } |
390 | 3427 } |
3428 }; | |
3429 | |
12080 | 3430 void G1CollectedHeap::verify(bool silent, VerifyOption vo) { |
8855
24ef5fb05e0f
8010463: G1: Crashes with -UseTLAB and heap verification
johnc
parents:
8853
diff
changeset
|
3431 if (SafepointSynchronize::is_at_safepoint()) { |
12080 | 3432 assert(Thread::current()->is_VM_thread(), |
3433 "Expected to be executed serially by the VM thread at this point"); | |
3434 | |
6725
da91efe96a93
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|
3435 if (!silent) { gclog_or_tty->print("Roots "); } |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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diff
changeset
|
3436 VerifyRootsClosure rootsCl(vo); |
12080 | 3437 G1VerifyCodeRootOopClosure codeRootsCl(this, &rootsCl, vo); |
3438 G1VerifyCodeRootBlobClosure blobsCl(&codeRootsCl); | |
6725
da91efe96a93
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|
3439 VerifyKlassClosure klassCl(this, &rootsCl); |
3772
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diff
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|
3440 |
3293
1f4413413144
7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
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diff
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|
3441 // We apply the relevant closures to all the oops in the |
1f4413413144
7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
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diff
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|
3442 // system dictionary, the string table and the code cache. |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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diff
changeset
|
3443 const int so = SO_AllClasses | SO_Strings | SO_CodeCache; |
3772
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|
3444 |
6725
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|
3445 // Need cleared claim bits for the strong roots processing |
da91efe96a93
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|
3446 ClassLoaderDataGraph::clear_claimed_marks(); |
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|
3447 |
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diff
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|
3448 process_strong_roots(true, // activate StrongRootsScope |
6725
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|
3449 false, // we set "is scavenging" to false, |
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|
3450 // so we don't reset the dirty cards. |
4910
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7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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|
3451 ScanningOption(so), // roots scanning options |
342 | 3452 &rootsCl, |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
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diff
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|
3453 &blobsCl, |
6725
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|
3454 &klassCl |
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|
3455 ); |
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|
3456 |
12080 | 3457 bool failures = rootsCl.failures() || codeRootsCl.failures(); |
3772
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|
3458 |
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|
3459 if (vo != VerifyOption_G1UseMarkWord) { |
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|
3460 // If we're verifying during a full GC then the region sets |
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|
3461 // will have been torn down at the start of the GC. Therefore |
6747fd0512e0
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diff
changeset
|
3462 // verifying the region sets will fail. So we only verify |
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3766
diff
changeset
|
3463 // the region sets when not in a full GC. |
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3766
diff
changeset
|
3464 if (!silent) { gclog_or_tty->print("HeapRegionSets "); } |
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3766
diff
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|
3465 verify_region_sets(); |
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|
3466 } |
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|
3467 |
2152 | 3468 if (!silent) { gclog_or_tty->print("HeapRegions "); } |
390 | 3469 if (GCParallelVerificationEnabled && ParallelGCThreads > 1) { |
3470 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
3471 "sanity check"); | |
3472 | |
6008 | 3473 G1ParVerifyTask task(this, vo); |
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|
3474 assert(UseDynamicNumberOfGCThreads || |
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|
3475 workers()->active_workers() == workers()->total_workers(), |
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|
3476 "If not dynamic should be using all the workers"); |
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|
3477 int n_workers = workers()->active_workers(); |
390 | 3478 set_par_threads(n_workers); |
3479 workers()->run_task(&task); | |
3480 set_par_threads(0); | |
1020
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|
3481 if (task.failures()) { |
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|
3482 failures = true; |
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|
3483 } |
390 | 3484 |
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|
3485 // Checks that the expected amount of parallel work was done. |
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|
3486 // The implication is that n_workers is > 0. |
390 | 3487 assert(check_heap_region_claim_values(HeapRegion::ParVerifyClaimValue), |
3488 "sanity check"); | |
3489 | |
3490 reset_heap_region_claim_values(); | |
3491 | |
3492 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
3493 "sanity check"); | |
3494 } else { | |
6008 | 3495 VerifyRegionClosure blk(false, vo); |
3766 | 3496 heap_region_iterate(&blk); |
1020
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|
3497 if (blk.failures()) { |
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|
3498 failures = true; |
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|
3499 } |
390 | 3500 } |
2152 | 3501 if (!silent) gclog_or_tty->print("RemSet "); |
342 | 3502 rem_set()->verify(); |
1020
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|
3503 |
17764 | 3504 if (G1StringDedup::is_enabled()) { |
3505 if (!silent) gclog_or_tty->print("StrDedup "); | |
3506 G1StringDedup::verify(); | |
3507 } | |
3508 | |
1020
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|
3509 if (failures) { |
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diff
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|
3510 gclog_or_tty->print_cr("Heap:"); |
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
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diff
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|
3511 // It helps to have the per-region information in the output to |
53074c2c4600
7099849: G1: include heap region information in hs_err files
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diff
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|
3512 // help us track down what went wrong. This is why we call |
53074c2c4600
7099849: G1: include heap region information in hs_err files
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diff
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|
3513 // print_extended_on() instead of print_on(). |
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|
3514 print_extended_on(gclog_or_tty); |
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
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diff
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|
3515 gclog_or_tty->cr(); |
1547
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6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
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diff
changeset
|
3516 #ifndef PRODUCT |
1044 | 3517 if (VerifyDuringGC && G1VerifyDuringGCPrintReachable) { |
1388 | 3518 concurrent_mark()->print_reachable("at-verification-failure", |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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3766
diff
changeset
|
3519 vo, false /* all */); |
1020
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|
3520 } |
1547
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|
3521 #endif |
1020
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|
3522 gclog_or_tty->flush(); |
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|
3523 } |
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|
3524 guarantee(!failures, "there should not have been any failures"); |
342 | 3525 } else { |
17764 | 3526 if (!silent) { |
3527 gclog_or_tty->print("(SKIPPING Roots, HeapRegionSets, HeapRegions, RemSet"); | |
3528 if (G1StringDedup::is_enabled()) { | |
3529 gclog_or_tty->print(", StrDedup"); | |
3530 } | |
3531 gclog_or_tty->print(") "); | |
3532 } | |
342 | 3533 } |
3534 } | |
3535 | |
12080 | 3536 void G1CollectedHeap::verify(bool silent) { |
3537 verify(silent, VerifyOption_G1UsePrevMarking); | |
3538 } | |
3539 | |
3540 double G1CollectedHeap::verify(bool guard, const char* msg) { | |
3541 double verify_time_ms = 0.0; | |
3542 | |
3543 if (guard && total_collections() >= VerifyGCStartAt) { | |
3544 double verify_start = os::elapsedTime(); | |
3545 HandleMark hm; // Discard invalid handles created during verification | |
3546 prepare_for_verify(); | |
3547 Universe::verify(VerifyOption_G1UsePrevMarking, msg); | |
3548 verify_time_ms = (os::elapsedTime() - verify_start) * 1000; | |
3549 } | |
3550 | |
3551 return verify_time_ms; | |
3552 } | |
3553 | |
3554 void G1CollectedHeap::verify_before_gc() { | |
3555 double verify_time_ms = verify(VerifyBeforeGC, " VerifyBeforeGC:"); | |
3556 g1_policy()->phase_times()->record_verify_before_time_ms(verify_time_ms); | |
3557 } | |
3558 | |
3559 void G1CollectedHeap::verify_after_gc() { | |
3560 double verify_time_ms = verify(VerifyAfterGC, " VerifyAfterGC:"); | |
3561 g1_policy()->phase_times()->record_verify_after_time_ms(verify_time_ms); | |
3562 } | |
3563 | |
342 | 3564 class PrintRegionClosure: public HeapRegionClosure { |
3565 outputStream* _st; | |
3566 public: | |
3567 PrintRegionClosure(outputStream* st) : _st(st) {} | |
3568 bool doHeapRegion(HeapRegion* r) { | |
3569 r->print_on(_st); | |
3570 return false; | |
3571 } | |
3572 }; | |
3573 | |
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|
3574 bool G1CollectedHeap::is_obj_dead_cond(const oop obj, |
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|
3575 const HeapRegion* hr, |
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|
3576 const VerifyOption vo) const { |
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|
3577 switch (vo) { |
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|
3578 case VerifyOption_G1UsePrevMarking: return is_obj_dead(obj, hr); |
bfdf528be8e8
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diff
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|
3579 case VerifyOption_G1UseNextMarking: return is_obj_ill(obj, hr); |
bfdf528be8e8
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|
3580 case VerifyOption_G1UseMarkWord: return !obj->is_gc_marked(); |
bfdf528be8e8
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diff
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|
3581 default: ShouldNotReachHere(); |
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|
3582 } |
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diff
changeset
|
3583 return false; // keep some compilers happy |
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diff
changeset
|
3584 } |
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|
3585 |
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|
3586 bool G1CollectedHeap::is_obj_dead_cond(const oop obj, |
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diff
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|
3587 const VerifyOption vo) const { |
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|
3588 switch (vo) { |
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|
3589 case VerifyOption_G1UsePrevMarking: return is_obj_dead(obj); |
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|
3590 case VerifyOption_G1UseNextMarking: return is_obj_ill(obj); |
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|
3591 case VerifyOption_G1UseMarkWord: return !obj->is_gc_marked(); |
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|
3592 default: ShouldNotReachHere(); |
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|
3593 } |
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|
3594 return false; // keep some compilers happy |
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changeset
|
3595 } |
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|
3596 |
342 | 3597 void G1CollectedHeap::print_on(outputStream* st) const { |
838
0316eac49d5a
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diff
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|
3598 st->print(" %-20s", "garbage-first heap"); |
0316eac49d5a
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diff
changeset
|
3599 st->print(" total " SIZE_FORMAT "K, used " SIZE_FORMAT "K", |
846
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
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845
diff
changeset
|
3600 capacity()/K, used_unlocked()/K); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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diff
changeset
|
3601 st->print(" [" INTPTR_FORMAT ", " INTPTR_FORMAT ", " INTPTR_FORMAT ")", |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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|
3602 _g1_storage.low_boundary(), |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
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811
diff
changeset
|
3603 _g1_storage.high(), |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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|
3604 _g1_storage.high_boundary()); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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changeset
|
3605 st->cr(); |
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3983
diff
changeset
|
3606 st->print(" region size " SIZE_FORMAT "K, ", HeapRegion::GrainBytes / K); |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
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6008
diff
changeset
|
3607 uint young_regions = _young_list->length(); |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
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6008
diff
changeset
|
3608 st->print("%u young (" SIZE_FORMAT "K), ", young_regions, |
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7157073: G1: type change size_t -> uint for region counts / indexes
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diff
changeset
|
3609 (size_t) young_regions * HeapRegion::GrainBytes / K); |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
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diff
changeset
|
3610 uint survivor_regions = g1_policy()->recorded_survivor_regions(); |
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7157073: G1: type change size_t -> uint for region counts / indexes
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6008
diff
changeset
|
3611 st->print("%u survivors (" SIZE_FORMAT "K)", survivor_regions, |
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7157073: G1: type change size_t -> uint for region counts / indexes
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6008
diff
changeset
|
3612 (size_t) survivor_regions * HeapRegion::GrainBytes / K); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
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811
diff
changeset
|
3613 st->cr(); |
6863
04155d9c8c76
8000358: G1: metaspace information not printed in PrintHeapAtGC output nor in hs_err file
johnc
parents:
6819
diff
changeset
|
3614 MetaspaceAux::print_on(st); |
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
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4072
diff
changeset
|
3615 } |
53074c2c4600
7099849: G1: include heap region information in hs_err files
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diff
changeset
|
3616 |
53074c2c4600
7099849: G1: include heap region information in hs_err files
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diff
changeset
|
3617 void G1CollectedHeap::print_extended_on(outputStream* st) const { |
53074c2c4600
7099849: G1: include heap region information in hs_err files
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parents:
4072
diff
changeset
|
3618 print_on(st); |
53074c2c4600
7099849: G1: include heap region information in hs_err files
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4072
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changeset
|
3619 |
53074c2c4600
7099849: G1: include heap region information in hs_err files
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diff
changeset
|
3620 // Print the per-region information. |
53074c2c4600
7099849: G1: include heap region information in hs_err files
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parents:
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diff
changeset
|
3621 st->cr(); |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3622 st->print_cr("Heap Regions: (Y=young(eden), SU=young(survivor), " |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
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diff
changeset
|
3623 "HS=humongous(starts), HC=humongous(continues), " |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
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6008
diff
changeset
|
3624 "CS=collection set, F=free, TS=gc time stamp, " |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
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6008
diff
changeset
|
3625 "PTAMS=previous top-at-mark-start, " |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
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diff
changeset
|
3626 "NTAMS=next top-at-mark-start)"); |
342 | 3627 PrintRegionClosure blk(st); |
3766 | 3628 heap_region_iterate(&blk); |
342 | 3629 } |
3630 | |
9076
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3631 void G1CollectedHeap::print_on_error(outputStream* st) const { |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
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8855
diff
changeset
|
3632 this->CollectedHeap::print_on_error(st); |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3633 |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
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8855
diff
changeset
|
3634 if (_cm != NULL) { |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3635 st->cr(); |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
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8855
diff
changeset
|
3636 _cm->print_on_error(st); |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3637 } |
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8011872: Include Bit Map addresses in the hs_err files
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8855
diff
changeset
|
3638 } |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
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8855
diff
changeset
|
3639 |
342 | 3640 void G1CollectedHeap::print_gc_threads_on(outputStream* st) const { |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
3641 if (G1CollectedHeap::use_parallel_gc_threads()) { |
1019 | 3642 workers()->print_worker_threads_on(st); |
3643 } | |
3644 _cmThread->print_on(st); | |
342 | 3645 st->cr(); |
1019 | 3646 _cm->print_worker_threads_on(st); |
3647 _cg1r->print_worker_threads_on(st); | |
17764 | 3648 if (G1StringDedup::is_enabled()) { |
3649 G1StringDedup::print_worker_threads_on(st); | |
3650 } | |
342 | 3651 } |
3652 | |
3653 void G1CollectedHeap::gc_threads_do(ThreadClosure* tc) const { | |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
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1755
diff
changeset
|
3654 if (G1CollectedHeap::use_parallel_gc_threads()) { |
342 | 3655 workers()->threads_do(tc); |
3656 } | |
3657 tc->do_thread(_cmThread); | |
794 | 3658 _cg1r->threads_do(tc); |
17764 | 3659 if (G1StringDedup::is_enabled()) { |
3660 G1StringDedup::threads_do(tc); | |
3661 } | |
342 | 3662 } |
3663 | |
3664 void G1CollectedHeap::print_tracing_info() const { | |
3665 // We'll overload this to mean "trace GC pause statistics." | |
3666 if (TraceGen0Time || TraceGen1Time) { | |
3667 // The "G1CollectorPolicy" is keeping track of these stats, so delegate | |
3668 // to that. | |
3669 g1_policy()->print_tracing_info(); | |
3670 } | |
751 | 3671 if (G1SummarizeRSetStats) { |
342 | 3672 g1_rem_set()->print_summary_info(); |
3673 } | |
1282 | 3674 if (G1SummarizeConcMark) { |
342 | 3675 concurrent_mark()->print_summary_info(); |
3676 } | |
3677 g1_policy()->print_yg_surv_rate_info(); | |
3678 SpecializationStats::print(); | |
3679 } | |
3680 | |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
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3774
diff
changeset
|
3681 #ifndef PRODUCT |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
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3774
diff
changeset
|
3682 // Helpful for debugging RSet issues. |
e8b0b0392037
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tonyp
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3774
diff
changeset
|
3683 |
e8b0b0392037
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tonyp
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3774
diff
changeset
|
3684 class PrintRSetsClosure : public HeapRegionClosure { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
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3774
diff
changeset
|
3685 private: |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3686 const char* _msg; |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
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3774
diff
changeset
|
3687 size_t _occupied_sum; |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
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3774
diff
changeset
|
3688 |
e8b0b0392037
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3774
diff
changeset
|
3689 public: |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
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3774
diff
changeset
|
3690 bool doHeapRegion(HeapRegion* r) { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3691 HeapRegionRemSet* hrrs = r->rem_set(); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3692 size_t occupied = hrrs->occupied(); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3693 _occupied_sum += occupied; |
e8b0b0392037
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tonyp
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3774
diff
changeset
|
3694 |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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parents:
3774
diff
changeset
|
3695 gclog_or_tty->print_cr("Printing RSet for region "HR_FORMAT, |
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7046182: G1: remove unnecessary iterations over the collection set
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parents:
3774
diff
changeset
|
3696 HR_FORMAT_PARAMS(r)); |
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7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3697 if (occupied == 0) { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3698 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
|
3699 } else { |
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7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3700 hrrs->print(); |
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7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3701 } |
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tonyp
parents:
3774
diff
changeset
|
3702 gclog_or_tty->print_cr("----------"); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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parents:
3774
diff
changeset
|
3703 return false; |
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7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3704 } |
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7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
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diff
changeset
|
3705 |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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parents:
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diff
changeset
|
3706 PrintRSetsClosure(const char* msg) : _msg(msg), _occupied_sum(0) { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3707 gclog_or_tty->cr(); |
e8b0b0392037
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parents:
3774
diff
changeset
|
3708 gclog_or_tty->print_cr("========================================"); |
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17935
diff
changeset
|
3709 gclog_or_tty->print_cr("%s", msg); |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3710 gclog_or_tty->cr(); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3711 } |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3712 |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3713 ~PrintRSetsClosure() { |
e8b0b0392037
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parents:
3774
diff
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|
3714 gclog_or_tty->print_cr("Occupied Sum: "SIZE_FORMAT, _occupied_sum); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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parents:
3774
diff
changeset
|
3715 gclog_or_tty->print_cr("========================================"); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
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diff
changeset
|
3716 gclog_or_tty->cr(); |
e8b0b0392037
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tonyp
parents:
3774
diff
changeset
|
3717 } |
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7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3718 }; |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3719 |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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parents:
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diff
changeset
|
3720 void G1CollectedHeap::print_cset_rsets() { |
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parents:
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changeset
|
3721 PrintRSetsClosure cl("Printing CSet RSets"); |
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tonyp
parents:
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diff
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|
3722 collection_set_iterate(&cl); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3723 } |
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7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3724 |
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parents:
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diff
changeset
|
3725 void G1CollectedHeap::print_all_rsets() { |
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parents:
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|
3726 PrintRSetsClosure cl("Printing All RSets");; |
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tonyp
parents:
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diff
changeset
|
3727 heap_region_iterate(&cl); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
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diff
changeset
|
3728 } |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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parents:
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diff
changeset
|
3729 #endif // PRODUCT |
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parents:
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diff
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|
3730 |
342 | 3731 G1CollectedHeap* G1CollectedHeap::heap() { |
3732 assert(_sh->kind() == CollectedHeap::G1CollectedHeap, | |
3733 "not a garbage-first heap"); | |
3734 return _g1h; | |
3735 } | |
3736 | |
3737 void G1CollectedHeap::gc_prologue(bool full /* Ignored */) { | |
1245
6484c4ee11cb
6904516: More object array barrier fixes, following up on 6906727
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parents:
1166
diff
changeset
|
3738 // always_do_update_barrier = false; |
342 | 3739 assert(InlineCacheBuffer::is_empty(), "should have cleaned up ICBuffer"); |
3740 // Fill TLAB's and such | |
17727 | 3741 accumulate_statistics_all_tlabs(); |
342 | 3742 ensure_parsability(true); |
12339
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
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diff
changeset
|
3743 |
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3744 if (G1SummarizeRSetStats && (G1SummarizeRSetStatsPeriod > 0) && |
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3745 (total_collections() % G1SummarizeRSetStatsPeriod == 0)) { |
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3746 g1_rem_set()->print_periodic_summary_info("Before GC RS summary"); |
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
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diff
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|
3747 } |
342 | 3748 } |
3749 | |
3750 void G1CollectedHeap::gc_epilogue(bool full /* Ignored */) { | |
10372
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3751 |
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3752 if (G1SummarizeRSetStats && |
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3753 (G1SummarizeRSetStatsPeriod > 0) && |
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3754 // 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
|
3755 ((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
|
3756 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
|
3757 } |
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8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3758 |
342 | 3759 // FIXME: what is this about? |
3760 // I'm ignoring the "fill_newgen()" call if "alloc_event_enabled" | |
3761 // is set. | |
3762 COMPILER2_PRESENT(assert(DerivedPointerTable::is_empty(), | |
3763 "derived pointer present")); | |
1245
6484c4ee11cb
6904516: More object array barrier fixes, following up on 6906727
ysr
parents:
1166
diff
changeset
|
3764 // always_do_update_barrier = true; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3765 |
17727 | 3766 resize_all_tlabs(); |
3767 | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3768 // We have just completed a GC. Update the soft reference |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3769 // policy with the new heap occupancy |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3770 Universe::update_heap_info_at_gc(); |
342 | 3771 } |
3772 | |
1973 | 3773 HeapWord* G1CollectedHeap::do_collection_pause(size_t word_size, |
3774 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
|
3775 bool* succeeded, |
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
12082
diff
changeset
|
3776 GCCause::Cause gc_cause) { |
1973 | 3777 assert_heap_not_locked_and_not_at_safepoint(); |
342 | 3778 g1_policy()->record_stop_world_start(); |
1973 | 3779 VM_G1IncCollectionPause op(gc_count_before, |
3780 word_size, | |
3781 false, /* should_initiate_conc_mark */ | |
3782 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
|
3783 gc_cause); |
1973 | 3784 VMThread::execute(&op); |
3785 | |
3786 HeapWord* result = op.result(); | |
3787 bool ret_succeeded = op.prologue_succeeded() && op.pause_succeeded(); | |
3788 assert(result == NULL || ret_succeeded, | |
3789 "the result should be NULL if the VM did not succeed"); | |
3790 *succeeded = ret_succeeded; | |
3791 | |
3792 assert_heap_not_locked(); | |
3793 return result; | |
342 | 3794 } |
3795 | |
3796 void | |
3797 G1CollectedHeap::doConcurrentMark() { | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3798 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
|
3799 if (!_cmThread->in_progress()) { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3800 _cmThread->set_started(); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3801 CGC_lock->notify(); |
342 | 3802 } |
3803 } | |
3804 | |
3805 size_t G1CollectedHeap::pending_card_num() { | |
3806 size_t extra_cards = 0; | |
3807 JavaThread *curr = Threads::first(); | |
3808 while (curr != NULL) { | |
3809 DirtyCardQueue& dcq = curr->dirty_card_queue(); | |
3810 extra_cards += dcq.size(); | |
3811 curr = curr->next(); | |
3812 } | |
3813 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
3814 size_t buffer_size = dcqs.buffer_size(); | |
3815 size_t buffer_num = dcqs.completed_buffers_num(); | |
6611 | 3816 |
3817 // PtrQueueSet::buffer_size() and PtrQueue:size() return sizes | |
3818 // in bytes - not the number of 'entries'. We need to convert | |
3819 // into a number of cards. | |
3820 return (buffer_size * buffer_num + extra_cards) / oopSize; | |
342 | 3821 } |
3822 | |
3823 size_t G1CollectedHeap::cards_scanned() { | |
1861 | 3824 return g1_rem_set()->cardsScanned(); |
342 | 3825 } |
3826 | |
3827 void | |
3828 G1CollectedHeap::setup_surviving_young_words() { | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3829 assert(_surviving_young_words == NULL, "pre-condition"); |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3830 uint array_length = g1_policy()->young_cset_region_length(); |
6197 | 3831 _surviving_young_words = NEW_C_HEAP_ARRAY(size_t, (size_t) array_length, mtGC); |
342 | 3832 if (_surviving_young_words == NULL) { |
10161
746b070f5022
8011661: Insufficient memory message says "malloc" when sometimes it should say "mmap"
ccheung
parents:
10099
diff
changeset
|
3833 vm_exit_out_of_memory(sizeof(size_t) * array_length, OOM_MALLOC_ERROR, |
342 | 3834 "Not enough space for young surv words summary."); |
3835 } | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3836 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
|
3837 #ifdef ASSERT |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3838 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
|
3839 assert( _surviving_young_words[i] == 0, "memset above" ); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3840 } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3841 #endif // !ASSERT |
342 | 3842 } |
3843 | |
3844 void | |
3845 G1CollectedHeap::update_surviving_young_words(size_t* surv_young_words) { | |
3846 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
|
3847 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
|
3848 for (uint i = 0; i < array_length; ++i) { |
342 | 3849 _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
|
3850 } |
342 | 3851 } |
3852 | |
3853 void | |
3854 G1CollectedHeap::cleanup_surviving_young_words() { | |
3855 guarantee( _surviving_young_words != NULL, "pre-condition" ); | |
6197 | 3856 FREE_C_HEAP_ARRAY(size_t, _surviving_young_words, mtGC); |
342 | 3857 _surviving_young_words = NULL; |
3858 } | |
3859 | |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3860 #ifdef ASSERT |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3861 class VerifyCSetClosure: public HeapRegionClosure { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3862 public: |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3863 bool doHeapRegion(HeapRegion* hr) { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3864 // 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
|
3865 // 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
|
3866 // 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
|
3867 // 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
|
3868 // 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
|
3869 // 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
|
3870 // 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
|
3871 // 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
|
3872 // evacuation failure handling. |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3873 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
|
3874 |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3875 // 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
|
3876 // perform on CSet regions. |
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3877 return false; |
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3878 } |
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3879 }; |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3880 #endif // ASSERT |
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3881 |
1709 | 3882 #if TASKQUEUE_STATS |
3883 void G1CollectedHeap::print_taskqueue_stats_hdr(outputStream* const st) { | |
3884 st->print_raw_cr("GC Task Stats"); | |
3885 st->print_raw("thr "); TaskQueueStats::print_header(1, st); st->cr(); | |
3886 st->print_raw("--- "); TaskQueueStats::print_header(2, st); st->cr(); | |
3887 } | |
3888 | |
3889 void G1CollectedHeap::print_taskqueue_stats(outputStream* const st) const { | |
3890 print_taskqueue_stats_hdr(st); | |
3891 | |
3892 TaskQueueStats totals; | |
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3893 const int n = workers() != NULL ? workers()->total_workers() : 1; |
1709 | 3894 for (int i = 0; i < n; ++i) { |
3895 st->print("%3d ", i); task_queue(i)->stats.print(st); st->cr(); | |
3896 totals += task_queue(i)->stats; | |
3897 } | |
3898 st->print_raw("tot "); totals.print(st); st->cr(); | |
3899 | |
3900 DEBUG_ONLY(totals.verify()); | |
3901 } | |
3902 | |
3903 void G1CollectedHeap::reset_taskqueue_stats() { | |
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3904 const int n = workers() != NULL ? workers()->total_workers() : 1; |
1709 | 3905 for (int i = 0; i < n; ++i) { |
3906 task_queue(i)->stats.reset(); | |
3907 } | |
3908 } | |
3909 #endif // TASKQUEUE_STATS | |
3910 | |
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3911 void G1CollectedHeap::log_gc_header() { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3912 if (!G1Log::fine()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3913 return; |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3914 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3915 |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3916 gclog_or_tty->date_stamp(PrintGCDateStamps); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3917 gclog_or_tty->stamp(PrintGCTimeStamps); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3918 |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3919 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
|
3920 .append(g1_policy()->gcs_are_young() ? "(young)" : "(mixed)") |
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3921 .append(g1_policy()->during_initial_mark_pause() ? " (initial-mark)" : ""); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3922 |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3923 gclog_or_tty->print("[%s", (const char*)gc_cause_str); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3924 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3925 |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3926 void G1CollectedHeap::log_gc_footer(double pause_time_sec) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3927 if (!G1Log::fine()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3928 return; |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3929 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3930 |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3931 if (G1Log::finer()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3932 if (evacuation_failed()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3933 gclog_or_tty->print(" (to-space exhausted)"); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3934 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3935 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
|
3936 g1_policy()->phase_times()->note_gc_end(); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3937 g1_policy()->phase_times()->print(pause_time_sec); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3938 g1_policy()->print_detailed_heap_transition(); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3939 } else { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3940 if (evacuation_failed()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3941 gclog_or_tty->print("--"); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3942 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3943 g1_policy()->print_heap_transition(); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3944 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
|
3945 } |
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
3946 gclog_or_tty->flush(); |
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3947 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3948 |
1973 | 3949 bool |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3950 G1CollectedHeap::do_collection_pause_at_safepoint(double target_pause_time_ms) { |
2152 | 3951 assert_at_safepoint(true /* should_be_vm_thread */); |
3952 guarantee(!is_gc_active(), "collection is not reentrant"); | |
3953 | |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3954 if (GC_locker::check_active_before_gc()) { |
1973 | 3955 return false; |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3956 } |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3957 |
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
3958 _gc_timer_stw->register_gc_start(); |
10405 | 3959 |
3960 _gc_tracer_stw->report_gc_start(gc_cause(), _gc_timer_stw->gc_start()); | |
3961 | |
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2039
diff
changeset
|
3962 SvcGCMarker sgcm(SvcGCMarker::MINOR); |
2039
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3963 ResourceMark rm; |
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3964 |
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4787
diff
changeset
|
3965 print_heap_before_gc(); |
10405 | 3966 trace_heap_before_gc(_gc_tracer_stw); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3967 |
2152 | 3968 verify_region_sets_optional(); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3969 verify_dirty_young_regions(); |
2152 | 3970 |
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3971 // 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
|
3972 // 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
|
3973 // for the duration of this pause. |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3974 g1_policy()->decide_on_conc_mark_initiation(); |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3975 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3976 // We 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
|
3977 assert(!g1_policy()->during_initial_mark_pause() || |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3978 g1_policy()->gcs_are_young(), "sanity"); |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3979 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3980 // 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
|
3981 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
|
3982 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3983 // 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
|
3984 // 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
|
3985 // 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
|
3986 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
|
3987 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3988 // 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
|
3989 { |
10405 | 3990 EvacuationInfo evacuation_info; |
3991 | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3992 if (g1_policy()->during_initial_mark_pause()) { |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3993 // 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
|
3994 // full collection counter. |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
3995 increment_old_marking_cycles_started(); |
10405 | 3996 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
|
3997 } |
10405 | 3998 |
3999 _gc_tracer_stw->report_yc_type(yc_type()); | |
4000 | |
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
4001 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
6030 | 4002 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4003 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
|
4004 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
|
4005 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
|
4006 g1_policy()->phase_times()->note_gc_start(active_workers); |
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
4007 log_gc_header(); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4008 |
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
4009 TraceCollectorStats tcs(g1mm()->incremental_collection_counters()); |
3356
78542e2b5e35
7036199: Adding a notification to the implementation of GarbageCollectorMXBeans
fparain
parents:
3323
diff
changeset
|
4010 TraceMemoryManagerStats tms(false /* fullGC */, gc_cause()); |
1089
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
tonyp
parents:
1088
diff
changeset
|
4011 |
2361 | 4012 // If the secondary_free_list is not empty, append it to the |
4013 // free_list. No need to wait for the cleanup operation to finish; | |
4014 // the region allocation code will check the secondary_free_list | |
4015 // and wait if necessary. If the G1StressConcRegionFreeing flag is | |
4016 // set, skip this step so that the region allocation code has to | |
4017 // get entries from the secondary_free_list. | |
2152 | 4018 if (!G1StressConcRegionFreeing) { |
2361 | 4019 append_secondary_free_list_if_not_empty_with_lock(); |
2152 | 4020 } |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4021 |
12080 | 4022 assert(check_young_list_well_formed(), "young list should be well formed"); |
4023 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
4024 "sanity check"); | |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4025 |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4026 // 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
|
4027 // 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
|
4028 // it will be set. |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4029 |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4030 { // 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
|
4031 IsGCActiveMark x; |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4032 |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4033 gc_prologue(false); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4034 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
|
4035 increment_gc_time_stamp(); |
342 | 4036 |
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
|
4037 verify_before_gc(); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4038 |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4039 COMPILER2_PRESENT(DerivedPointerTable::clear()); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4040 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4041 // Please see comment in g1CollectedHeap.hpp and |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4042 // G1CollectedHeap::ref_processing_init() to see how |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4043 // reference processing currently works in G1. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4044 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4045 // Enable discovery in the STW reference processor |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4046 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4047 true /*verify_no_refs*/); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4048 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4049 { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4050 // We want to temporarily turn off discovery by the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4051 // CM ref processor, if necessary, and turn it back on |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4052 // on again later if we do. Using a scoped |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4053 // NoRefDiscovery object will do this. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4054 NoRefDiscovery no_cm_discovery(ref_processor_cm()); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4055 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4056 // 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
|
4057 // of the collection set!). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4058 release_mutator_alloc_region(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4059 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4060 // We should call this after we retire the mutator alloc |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4061 // region(s) so that all the ALLOC / RETIRE events are generated |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4062 // before the start GC event. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4063 _hr_printer.start_gc(false /* full */, (size_t) total_collections()); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4064 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4065 // 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
|
4066 // 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
|
4067 // 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
|
4068 // |
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4069 // 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
|
4070 // |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4071 // The elapsed time induced by the start time below deliberately elides |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4072 // 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
|
4073 double sample_start_time_sec = os::elapsedTime(); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4074 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4075 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4076 gclog_or_tty->print_cr("\nBefore recording pause start.\nYoung_list:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4077 _young_list->print(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4078 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
|
4079 #endif // YOUNG_LIST_VERBOSE |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4080 |
10098
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
4081 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
|
4082 |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4083 double scan_wait_start = os::elapsedTime(); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4084 // 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
|
4085 // 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
|
4086 // 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
|
4087 // moving them during the GC. |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4088 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
|
4089 double wait_time_ms = 0.0; |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4090 if (waited) { |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4091 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
|
4092 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
|
4093 } |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4094 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
|
4095 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4096 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4097 gclog_or_tty->print_cr("\nAfter recording pause start.\nYoung_list:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4098 _young_list->print(); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4099 #endif // YOUNG_LIST_VERBOSE |
342 | 4100 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4101 if (g1_policy()->during_initial_mark_pause()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4102 concurrent_mark()->checkpointRootsInitialPre(); |
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 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4105 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4106 gclog_or_tty->print_cr("\nBefore choosing collection set.\nYoung_list:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4107 _young_list->print(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4108 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
|
4109 #endif // YOUNG_LIST_VERBOSE |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4110 |
10405 | 4111 g1_policy()->finalize_cset(target_pause_time_ms, evacuation_info); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4112 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4113 _cm->note_start_of_gc(); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4114 // 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
|
4115 // 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
|
4116 // 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
|
4117 // ensure that the CSet has been finalized. |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4118 _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
|
4119 true /* verify_enqueued_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4120 false /* verify_thread_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4121 true /* verify_fingers */); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4122 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4123 if (_hr_printer.is_active()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4124 HeapRegion* hr = g1_policy()->collection_set(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4125 while (hr != NULL) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4126 G1HRPrinter::RegionType type; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4127 if (!hr->is_young()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4128 type = G1HRPrinter::Old; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4129 } else if (hr->is_survivor()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4130 type = G1HRPrinter::Survivor; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4131 } else { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4132 type = G1HRPrinter::Eden; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4133 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4134 _hr_printer.cset(hr); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4135 hr = hr->next_in_collection_set(); |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4136 } |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4137 } |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4138 |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
4139 #ifdef ASSERT |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4140 VerifyCSetClosure cl; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4141 collection_set_iterate(&cl); |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
4142 #endif // ASSERT |
1707 | 4143 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4144 setup_surviving_young_words(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4145 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4146 // Initialize the GC alloc regions. |
10405 | 4147 init_gc_alloc_regions(evacuation_info); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4148 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4149 // Actually do the work... |
10405 | 4150 evacuate_collection_set(evacuation_info); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4151 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4152 // 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
|
4153 // (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
|
4154 // 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
|
4155 // 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
|
4156 // we checked. |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4157 _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
|
4158 false /* verify_enqueued_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4159 true /* verify_thread_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4160 true /* verify_fingers */); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4161 |
10405 | 4162 free_collection_set(g1_policy()->collection_set(), evacuation_info); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4163 g1_policy()->clear_collection_set(); |
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 cleanup_surviving_young_words(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4166 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4167 // Start a new incremental collection set for the next pause. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4168 g1_policy()->start_incremental_cset_building(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4169 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4170 // Clear the _cset_fast_test bitmap in anticipation of adding |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4171 // regions to the incremental collection set for the next |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4172 // evacuation pause. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4173 clear_cset_fast_test(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4174 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4175 _young_list->reset_sampled_info(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4176 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4177 // Don't check the whole heap at this point as the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4178 // GC alloc regions from this pause have been tagged |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4179 // as survivors and moved on to the survivor list. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4180 // Survivor regions will fail the !is_young() check. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4181 assert(check_young_list_empty(false /* check_heap */), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4182 "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
|
4183 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4184 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4185 gclog_or_tty->print_cr("Before recording survivors.\nYoung List:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4186 _young_list->print(); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4187 #endif // YOUNG_LIST_VERBOSE |
342 | 4188 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4189 g1_policy()->record_survivor_regions(_young_list->survivor_length(), |
10405 | 4190 _young_list->first_survivor_region(), |
4191 _young_list->last_survivor_region()); | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4192 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4193 _young_list->reset_auxilary_lists(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4194 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4195 if (evacuation_failed()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4196 _summary_bytes_used = recalculate_used(); |
10405 | 4197 uint n_queues = MAX2((int)ParallelGCThreads, 1); |
4198 for (uint i = 0; i < n_queues; i++) { | |
4199 if (_evacuation_failed_info_array[i].has_failed()) { | |
4200 _gc_tracer_stw->report_evacuation_failed(_evacuation_failed_info_array[i]); | |
4201 } | |
4202 } | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4203 } else { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4204 // The "used" of the the collection set have already been subtracted |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4205 // when they were freed. Add in the bytes evacuated. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4206 _summary_bytes_used += g1_policy()->bytes_copied_during_gc(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4207 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4208 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4209 if (g1_policy()->during_initial_mark_pause()) { |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4210 // 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
|
4211 // 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
|
4212 // appropriate initialization is done on the CM object. |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4213 concurrent_mark()->checkpointRootsInitialPost(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4214 set_marking_started(); |
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4215 // 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
|
4216 // 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
|
4217 // the current thread has completed its logging output. |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4218 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4219 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4220 allocate_dummy_regions(); |
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
4221 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4222 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4223 gclog_or_tty->print_cr("\nEnd of the pause.\nYoung_list:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4224 _young_list->print(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4225 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
|
4226 #endif // YOUNG_LIST_VERBOSE |
342 | 4227 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4228 init_mutator_alloc_region(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4229 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4230 { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4231 size_t expand_bytes = g1_policy()->expansion_amount(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4232 if (expand_bytes > 0) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4233 size_t bytes_before = capacity(); |
4785 | 4234 // No need for an ergo verbose message here, |
4235 // expansion_amount() does this when it returns a value > 0. | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4236 if (!expand(expand_bytes)) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4237 // We failed to expand the heap so let's verify that |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4238 // committed/uncommitted amount match the backing store |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4239 assert(capacity() == _g1_storage.committed_size(), "committed size mismatch"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4240 assert(max_capacity() == _g1_storage.reserved_size(), "reserved size mismatch"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4241 } |
3920
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4242 } |
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4243 } |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4244 |
10405 | 4245 // 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
|
4246 // 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
|
4247 _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
|
4248 true /* verify_enqueued_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4249 true /* verify_thread_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4250 true /* verify_fingers */); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4251 _cm->note_end_of_gc(); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4252 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4253 // 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
|
4254 // 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
|
4255 // 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
|
4256 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
|
4257 double pause_time_ms = (sample_end_time_sec - sample_start_time_sec) * MILLIUNITS; |
10405 | 4258 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
|
4259 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4260 MemoryService::track_memory_usage(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4261 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4262 // 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
|
4263 // update buffers to bring the RSets up-to-date if |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4264 // G1HRRSFlushLogBuffersOnVerify has been set. While scanning |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4265 // 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
|
4266 // regions we just allocated to (i.e., the GC alloc |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4267 // regions). However, during the last GC we called |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4268 // set_saved_mark() on all the GC alloc regions, so card |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4269 // scanning might skip the [saved_mark_word()...top()] area of |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4270 // those regions (i.e., the area we allocated objects into |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4271 // during the last GC). But it shouldn't. Given that |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4272 // saved_mark_word() is conditional on whether the GC time stamp |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4273 // 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
|
4274 // 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
|
4275 // regions and saved_mark_word() will simply return top() for |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4276 // 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
|
4277 // than iterating over the regions and fixing them. In fact, the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4278 // GC time stamp increment here also ensures that |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4279 // saved_mark_word() will return top() between pauses, i.e., |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4280 // during concurrent refinement. So we don't need the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4281 // is_gc_active() check to decided which top to use when |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4282 // scanning cards (see CR 7039627). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4283 increment_gc_time_stamp(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4284 |
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
|
4285 verify_after_gc(); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4286 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4287 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4288 ref_processor_stw()->verify_no_references_recorded(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4289 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4290 // 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
|
4291 } |
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4292 |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4293 // 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
|
4294 // 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
|
4295 // 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
|
4296 // RETIRE events are generated before the end GC event. |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4297 _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
|
4298 |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4299 if (mark_in_progress()) { |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4300 concurrent_mark()->update_g1_committed(); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4301 } |
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4302 |
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4303 #ifdef TRACESPINNING |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4304 ParallelTaskTerminator::print_termination_counts(); |
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4305 #endif |
342 | 4306 |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4307 gc_epilogue(false); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4308 } |
6121
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4309 |
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
4310 // 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
|
4311 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
|
4312 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4313 // 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
|
4314 // 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
|
4315 // 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
|
4316 // logging output either. |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4317 |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4318 _hrs.verify_optional(); |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4319 verify_region_sets_optional(); |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4320 |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4321 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
|
4322 TASKQUEUE_STATS_ONLY(reset_taskqueue_stats()); |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4323 |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4324 print_heap_after_gc(); |
10405 | 4325 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
|
4326 |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4327 // 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
|
4328 // 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
|
4329 // 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
|
4330 // before any GC notifications are raised. |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4331 g1mm()->update_sizes(); |
10405 | 4332 |
4333 _gc_tracer_stw->report_evacuation_info(&evacuation_info); | |
4334 _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
|
4335 _gc_timer_stw->register_gc_end(); |
10405 | 4336 _gc_tracer_stw->report_gc_end(_gc_timer_stw->gc_end(), _gc_timer_stw->time_partitions()); |
4337 } | |
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4338 // 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
|
4339 // 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
|
4340 // that came from the pause. |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4341 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4342 if (should_start_conc_mark) { |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4343 // CAUTION: after the doConcurrentMark() call below, |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4344 // the concurrent marking thread(s) could be running |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4345 // concurrently with us. Make sure that anything after |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4346 // 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
|
4347 // 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
|
4348 // 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
|
4349 // ConcurrentGCThread::safepoint_desynchronize(). |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4350 doConcurrentMark(); |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4351 } |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4352 |
1973 | 4353 return true; |
342 | 4354 } |
4355 | |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4356 size_t G1CollectedHeap::desired_plab_sz(GCAllocPurpose purpose) |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4357 { |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4358 size_t gclab_word_size; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4359 switch (purpose) { |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4360 case GCAllocForSurvived: |
6595 | 4361 gclab_word_size = _survivor_plab_stats.desired_plab_sz(); |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4362 break; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4363 case GCAllocForTenured: |
6595 | 4364 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4365 break; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4366 default: |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4367 assert(false, "unknown GCAllocPurpose"); |
6595 | 4368 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4369 break; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4370 } |
6595 | 4371 |
4372 // Prevent humongous PLAB sizes for two reasons: | |
4373 // * PLABs are allocated using a similar paths as oops, but should | |
4374 // never be in a humongous region | |
4375 // * Allowing humongous PLABs needlessly churns the region free lists | |
4376 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
|
4377 } |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4378 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4379 void G1CollectedHeap::init_mutator_alloc_region() { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4380 assert(_mutator_alloc_region.get() == NULL, "pre-condition"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4381 _mutator_alloc_region.init(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4382 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4383 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4384 void G1CollectedHeap::release_mutator_alloc_region() { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4385 _mutator_alloc_region.release(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4386 assert(_mutator_alloc_region.get() == NULL, "post-condition"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4387 } |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4388 |
10405 | 4389 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
|
4390 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
|
4391 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4392 _survivor_gc_alloc_region.init(); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4393 _old_gc_alloc_region.init(); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4394 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
|
4395 _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
|
4396 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4397 // 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
|
4398 // 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
|
4399 // 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
|
4400 // 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
|
4401 // 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
|
4402 // 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
|
4403 // during a cleanup and was added to the free list, but |
10405 | 4404 // 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
|
4405 // 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
|
4406 if (retained_region != NULL && |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4407 !retained_region->in_collection_set() && |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4408 !(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
|
4409 !retained_region->is_empty() && |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4410 !retained_region->isHumongous()) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4411 retained_region->set_saved_mark(); |
4072 | 4412 // The retained region was added to the old region set when it was |
4413 // retired. We have to remove it now, since we don't allow regions | |
4414 // we allocate to in the region sets. We'll re-add it later, when | |
4415 // it's retired again. | |
4416 _old_set.remove(retained_region); | |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4417 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
|
4418 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
|
4419 _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
|
4420 _hr_printer.reuse(retained_region); |
10405 | 4421 evacuation_info.set_alloc_regions_used_before(retained_region->used()); |
4422 } | |
4423 } | |
4424 | |
4425 void G1CollectedHeap::release_gc_alloc_regions(uint no_of_gc_workers, EvacuationInfo& evacuation_info) { | |
4426 evacuation_info.set_allocation_regions(_survivor_gc_alloc_region.count() + | |
4427 _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
|
4428 _survivor_gc_alloc_region.release(); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4429 // 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
|
4430 // _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
|
4431 // _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
|
4432 // 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
|
4433 // condition. |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4434 _retained_old_gc_alloc_region = _old_gc_alloc_region.release(); |
6595 | 4435 |
4436 if (ResizePLAB) { | |
6819 | 4437 _survivor_plab_stats.adjust_desired_plab_sz(no_of_gc_workers); |
4438 _old_plab_stats.adjust_desired_plab_sz(no_of_gc_workers); | |
6595 | 4439 } |
342 | 4440 } |
4441 | |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4442 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
|
4443 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
|
4444 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
|
4445 _retained_old_gc_alloc_region = NULL; |
342 | 4446 } |
4447 | |
4448 void G1CollectedHeap::init_for_evac_failure(OopsInHeapRegionClosure* cl) { | |
4449 _drain_in_progress = false; | |
4450 set_evac_failure_closure(cl); | |
6197 | 4451 _evac_failure_scan_stack = new (ResourceObj::C_HEAP, mtGC) GrowableArray<oop>(40, true); |
342 | 4452 } |
4453 | |
4454 void G1CollectedHeap::finalize_for_evac_failure() { | |
4455 assert(_evac_failure_scan_stack != NULL && | |
4456 _evac_failure_scan_stack->length() == 0, | |
4457 "Postcondition"); | |
4458 assert(!_drain_in_progress, "Postcondition"); | |
1045 | 4459 delete _evac_failure_scan_stack; |
342 | 4460 _evac_failure_scan_stack = NULL; |
4461 } | |
4462 | |
4463 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
|
4464 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
|
4465 |
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4466 double remove_self_forwards_start = os::elapsedTime(); |
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4467 |
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4468 G1ParRemoveSelfForwardPtrsTask rsfp_task(this); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4469 |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4470 if (G1CollectedHeap::use_parallel_gc_threads()) { |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4471 set_par_threads(); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4472 workers()->run_task(&rsfp_task); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4473 set_par_threads(0); |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
4474 } else { |
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4475 rsfp_task.work(0); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4476 } |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4477 |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4478 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
|
4479 |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4480 // 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
|
4481 reset_cset_heap_region_claim_values(); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4482 |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4483 assert(check_cset_heap_region_claim_values(HeapRegion::InitialClaimValue), "sanity"); |
342 | 4484 |
4485 // 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
|
4486 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
|
4487 _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
|
4488 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
|
4489 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
|
4490 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
|
4491 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
|
4492 } |
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4493 _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
|
4494 _preserved_marks_of_objs.clear(true); |
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4495 |
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4496 g1_policy()->phase_times()->record_evac_fail_remove_self_forwards((os::elapsedTime() - remove_self_forwards_start) * 1000.0); |
342 | 4497 } |
4498 | |
4499 void G1CollectedHeap::push_on_evac_failure_scan_stack(oop obj) { | |
4500 _evac_failure_scan_stack->push(obj); | |
4501 } | |
4502 | |
4503 void G1CollectedHeap::drain_evac_failure_scan_stack() { | |
4504 assert(_evac_failure_scan_stack != NULL, "precondition"); | |
4505 | |
4506 while (_evac_failure_scan_stack->length() > 0) { | |
4507 oop obj = _evac_failure_scan_stack->pop(); | |
4508 _evac_failure_closure->set_region(heap_region_containing(obj)); | |
4509 obj->oop_iterate_backwards(_evac_failure_closure); | |
4510 } | |
4511 } | |
4512 | |
4513 oop | |
10405 | 4514 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
|
4515 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
|
4516 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
|
4517 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
|
4518 (HeapWord*) old)); |
342 | 4519 markOop m = old->mark(); |
4520 oop forward_ptr = old->forward_to_atomic(old); | |
4521 if (forward_ptr == NULL) { | |
4522 // Forward-to-self succeeded. | |
10405 | 4523 assert(_par_scan_state != NULL, "par scan state"); |
4524 OopsInHeapRegionClosure* cl = _par_scan_state->evac_failure_closure(); | |
4525 uint queue_num = _par_scan_state->queue_num(); | |
4526 | |
4527 _evacuation_failed = true; | |
4528 _evacuation_failed_info_array[queue_num].register_copy_failure(old->size()); | |
342 | 4529 if (_evac_failure_closure != cl) { |
4530 MutexLockerEx x(EvacFailureStack_lock, Mutex::_no_safepoint_check_flag); | |
4531 assert(!_drain_in_progress, | |
4532 "Should only be true while someone holds the lock."); | |
4533 // Set the global evac-failure closure to the current thread's. | |
4534 assert(_evac_failure_closure == NULL, "Or locking has failed."); | |
4535 set_evac_failure_closure(cl); | |
4536 // Now do the common part. | |
4537 handle_evacuation_failure_common(old, m); | |
4538 // Reset to NULL. | |
4539 set_evac_failure_closure(NULL); | |
4540 } else { | |
4541 // The lock is already held, and this is recursive. | |
4542 assert(_drain_in_progress, "This should only be the recursive case."); | |
4543 handle_evacuation_failure_common(old, m); | |
4544 } | |
4545 return old; | |
4546 } 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
|
4547 // 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
|
4548 // 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
|
4549 // 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
|
4550 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
|
4551 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
|
4552 "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
|
4553 (HeapWord*) old, (HeapWord*) forward_ptr)); |
342 | 4554 return forward_ptr; |
4555 } | |
4556 } | |
4557 | |
4558 void G1CollectedHeap::handle_evacuation_failure_common(oop old, markOop m) { | |
4559 preserve_mark_if_necessary(old, m); | |
4560 | |
4561 HeapRegion* r = heap_region_containing(old); | |
4562 if (!r->evacuation_failed()) { | |
4563 r->set_evacuation_failed(true); | |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4564 _hr_printer.evac_failure(r); |
342 | 4565 } |
4566 | |
4567 push_on_evac_failure_scan_stack(old); | |
4568 | |
4569 if (!_drain_in_progress) { | |
4570 // prevent recursion in copy_to_survivor_space() | |
4571 _drain_in_progress = true; | |
4572 drain_evac_failure_scan_stack(); | |
4573 _drain_in_progress = false; | |
4574 } | |
4575 } | |
4576 | |
4577 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
|
4578 assert(evacuation_failed(), "Oversaving!"); |
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4579 // 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
|
4580 // case of a promotion failure. |
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4581 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
|
4582 _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
|
4583 _preserved_marks_of_objs.push(m); |
342 | 4584 } |
4585 } | |
4586 | |
4587 HeapWord* G1CollectedHeap::par_allocate_during_gc(GCAllocPurpose purpose, | |
4588 size_t word_size) { | |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4589 if (purpose == GCAllocForSurvived) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4590 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
|
4591 if (result != NULL) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4592 return result; |
342 | 4593 } else { |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4594 // 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
|
4595 // object there. |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4596 return old_attempt_allocation(word_size); |
342 | 4597 } |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4598 } else { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4599 assert(purpose == GCAllocForTenured, "sanity"); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4600 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
|
4601 if (result != NULL) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4602 return result; |
342 | 4603 } else { |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4604 // 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
|
4605 // object there. |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4606 return survivor_attempt_allocation(word_size); |
342 | 4607 } |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4608 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4609 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4610 ShouldNotReachHere(); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4611 // 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
|
4612 return NULL; |
342 | 4613 } |
4614 | |
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4615 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
|
4616 ParGCAllocBuffer(gclab_word_size), _retired(false) { } |
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4617 |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4618 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
|
4619 : _g1h(g1h), |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4620 _refs(g1h->task_queue(queue_num)), |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4621 _dcq(&g1h->dirty_card_queue_set()), |
12343 | 4622 _ct_bs(g1h->g1_barrier_set()), |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4623 _g1_rem(g1h->g1_rem_set()), |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4624 _hash_seed(17), _queue_num(queue_num), |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4625 _term_attempts(0), |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4626 _surviving_alloc_buffer(g1h->desired_plab_sz(GCAllocForSurvived)), |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4627 _tenured_alloc_buffer(g1h->desired_plab_sz(GCAllocForTenured)), |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4628 _age_table(false), _scanner(g1h, this, rp), |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4629 _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
|
4630 _alloc_buffer_waste(0), _undo_waste(0) { |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4631 // we allocate G1YoungSurvRateNumRegions plus one entries, since |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4632 // 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
|
4633 // non-young regions (where the age is -1) |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4634 // 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
|
4635 // an attempt to eliminate cache contention |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4636 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
|
4637 uint array_length = PADDING_ELEM_NUM + |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4638 real_length + |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4639 PADDING_ELEM_NUM; |
6197 | 4640 _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
|
4641 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
|
4642 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
|
4643 "Not enough space for young surv histo."); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4644 _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
|
4645 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
|
4646 |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4647 _alloc_buffers[GCAllocForSurvived] = &_surviving_alloc_buffer; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4648 _alloc_buffers[GCAllocForTenured] = &_tenured_alloc_buffer; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4649 |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4650 _start = os::elapsedTime(); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4651 } |
342 | 4652 |
1709 | 4653 void |
4654 G1ParScanThreadState::print_termination_stats_hdr(outputStream* const st) | |
4655 { | |
4656 st->print_raw_cr("GC Termination Stats"); | |
4657 st->print_raw_cr(" elapsed --strong roots-- -------termination-------" | |
4658 " ------waste (KiB)------"); | |
4659 st->print_raw_cr("thr ms ms % ms % attempts" | |
4660 " total alloc undo"); | |
4661 st->print_raw_cr("--- --------- --------- ------ --------- ------ --------" | |
4662 " ------- ------- -------"); | |
4663 } | |
4664 | |
4665 void | |
4666 G1ParScanThreadState::print_termination_stats(int i, | |
4667 outputStream* const st) const | |
4668 { | |
4669 const double elapsed_ms = elapsed_time() * 1000.0; | |
4670 const double s_roots_ms = strong_roots_time() * 1000.0; | |
4671 const double term_ms = term_time() * 1000.0; | |
4672 st->print_cr("%3d %9.2f %9.2f %6.2f " | |
4673 "%9.2f %6.2f " SIZE_FORMAT_W(8) " " | |
4674 SIZE_FORMAT_W(7) " " SIZE_FORMAT_W(7) " " SIZE_FORMAT_W(7), | |
4675 i, elapsed_ms, s_roots_ms, s_roots_ms * 100 / elapsed_ms, | |
4676 term_ms, term_ms * 100 / elapsed_ms, term_attempts(), | |
4677 (alloc_buffer_waste() + undo_waste()) * HeapWordSize / K, | |
4678 alloc_buffer_waste() * HeapWordSize / K, | |
4679 undo_waste() * HeapWordSize / K); | |
4680 } | |
4681 | |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4682 #ifdef ASSERT |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4683 bool G1ParScanThreadState::verify_ref(narrowOop* ref) const { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4684 assert(ref != NULL, "invariant"); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4685 assert(UseCompressedOops, "sanity"); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4686 assert(!has_partial_array_mask(ref), err_msg("ref=" PTR_FORMAT, ref)); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4687 oop p = oopDesc::load_decode_heap_oop(ref); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4688 assert(_g1h->is_in_g1_reserved(p), |
12316
190899198332
7195622: CheckUnhandledOops has limited usefulness now
hseigel
parents:
12233
diff
changeset
|
4689 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, (void *)p)); |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4690 return true; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4691 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4692 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4693 bool G1ParScanThreadState::verify_ref(oop* ref) const { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4694 assert(ref != NULL, "invariant"); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4695 if (has_partial_array_mask(ref)) { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4696 // Must be in the collection set--it's already been copied. |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4697 oop p = clear_partial_array_mask(ref); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4698 assert(_g1h->obj_in_cs(p), |
12316
190899198332
7195622: CheckUnhandledOops has limited usefulness now
hseigel
parents:
12233
diff
changeset
|
4699 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, (void *)p)); |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4700 } else { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4701 oop p = oopDesc::load_decode_heap_oop(ref); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4702 assert(_g1h->is_in_g1_reserved(p), |
12316
190899198332
7195622: CheckUnhandledOops has limited usefulness now
hseigel
parents:
12233
diff
changeset
|
4703 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, (void *)p)); |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4704 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4705 return true; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4706 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4707 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4708 bool G1ParScanThreadState::verify_task(StarTask ref) const { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4709 if (ref.is_narrow()) { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4710 return verify_ref((narrowOop*) ref); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4711 } else { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4712 return verify_ref((oop*) ref); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4713 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4714 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4715 #endif // ASSERT |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4716 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4717 void G1ParScanThreadState::trim_queue() { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4718 assert(_evac_failure_cl != NULL, "not set"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4719 |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4720 StarTask ref; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4721 do { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4722 // Drain the overflow stack first, so other threads can steal. |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4723 while (refs()->pop_overflow(ref)) { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4724 deal_with_reference(ref); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4725 } |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4726 |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4727 while (refs()->pop_local(ref)) { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4728 deal_with_reference(ref); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4729 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4730 } while (!refs()->is_empty()); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4731 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4732 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4733 G1ParClosureSuper::G1ParClosureSuper(G1CollectedHeap* g1, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4734 G1ParScanThreadState* par_scan_state) : |
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4735 _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
|
4736 _worker_id(par_scan_state->queue_num()) { } |
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4737 |
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4738 void G1ParCopyHelper::mark_object(oop obj) { |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4739 #ifdef ASSERT |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4740 HeapRegion* hr = _g1->heap_region_containing(obj); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4741 assert(hr != NULL, "sanity"); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4742 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
|
4743 #endif // ASSERT |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4744 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4745 // 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
|
4746 _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
|
4747 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4748 |
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4749 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
|
4750 #ifdef ASSERT |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4751 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
|
4752 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
|
4753 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
|
4754 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4755 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
|
4756 assert(from_hr != NULL, "sanity"); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4757 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
|
4758 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4759 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
|
4760 assert(to_hr != NULL, "sanity"); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4761 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
|
4762 #endif // ASSERT |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4763 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4764 // 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
|
4765 // 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
|
4766 // 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
|
4767 // image which we know should not be changing. |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4768 _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
|
4769 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4770 |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4771 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
|
4772 size_t word_sz = old->size(); |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4773 HeapRegion* from_region = _g1h->heap_region_containing_raw(old); |
342 | 4774 // +1 to make the -1 indexes valid... |
4775 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
|
4776 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
|
4777 (!from_region->is_young() && young_index == 0), "invariant" ); |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4778 G1CollectorPolicy* g1p = _g1h->g1_policy(); |
342 | 4779 markOop m = old->mark(); |
545 | 4780 int age = m->has_displaced_mark_helper() ? m->displaced_mark_helper()->age() |
4781 : m->age(); | |
4782 GCAllocPurpose alloc_purpose = g1p->evacuation_destination(from_region, age, | |
342 | 4783 word_sz); |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4784 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
|
4785 #ifndef PRODUCT |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4786 // Should this evacuation fail? |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4787 if (_g1h->evacuation_should_fail()) { |
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4788 if (obj_ptr != NULL) { |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4789 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
|
4790 obj_ptr = NULL; |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4791 } |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4792 } |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4793 #endif // !PRODUCT |
342 | 4794 |
4795 if (obj_ptr == NULL) { | |
4796 // This will either forward-to-self, or detect that someone else has | |
4797 // installed a forwarding pointer. | |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4798 return _g1h->handle_evacuation_failure_par(this, old); |
342 | 4799 } |
4800 | |
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4801 oop obj = oop(obj_ptr); |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4802 |
526 | 4803 // We're going to allocate linearly, so might as well prefetch ahead. |
4804 Prefetch::write(obj_ptr, PrefetchCopyIntervalInBytes); | |
4805 | |
342 | 4806 oop forward_ptr = old->forward_to_atomic(obj); |
4807 if (forward_ptr == NULL) { | |
4808 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
|
4809 |
b7e42ada4898
8036672: G1: alloc_purpose in copy_to_survivor_space() used incorrectly
pliden
parents:
17748
diff
changeset
|
4810 // 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
|
4811 // 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
|
4812 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
|
4813 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
|
4814 |
526 | 4815 if (g1p->track_object_age(alloc_purpose)) { |
4816 // We could simply do obj->incr_age(). However, this causes a | |
4817 // performance issue. obj->incr_age() will first check whether | |
4818 // the object has a displaced mark by checking its mark word; | |
4819 // getting the mark word from the new location of the object | |
4820 // stalls. So, given that we already have the mark word and we | |
4821 // are about to install it anyway, it's better to increase the | |
4822 // age on the mark word, when the object does not have a | |
4823 // displaced mark word. We're not expecting many objects to have | |
4824 // a displaced marked word, so that case is not optimized | |
4825 // further (it could be...) and we simply call obj->incr_age(). | |
4826 | |
4827 if (m->has_displaced_mark_helper()) { | |
4828 // in this case, we have to install the mark word first, | |
4829 // otherwise obj looks to be forwarded (the old mark word, | |
4830 // which contains the forward pointer, was copied) | |
4831 obj->set_mark(m); | |
4832 obj->incr_age(); | |
4833 } else { | |
4834 m = m->incr_age(); | |
545 | 4835 obj->set_mark(m); |
526 | 4836 } |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4837 age_table()->add(obj, word_sz); |
545 | 4838 } else { |
4839 obj->set_mark(m); | |
526 | 4840 } |
4841 | |
17764 | 4842 if (G1StringDedup::is_enabled()) { |
4843 G1StringDedup::enqueue_from_evacuation(from_region->is_young(), | |
4844 to_region->is_young(), | |
4845 queue_num(), | |
4846 obj); | |
4847 } | |
4848 | |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4849 size_t* surv_young_words = surviving_young_words(); |
342 | 4850 surv_young_words[young_index] += word_sz; |
4851 | |
4852 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
|
4853 // 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
|
4854 // 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
|
4855 // 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
|
4856 arrayOop(obj)->set_length(0); |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4857 oop* old_p = set_partial_array_mask(old); |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4858 push_on_queue(old_p); |
342 | 4859 } else { |
526 | 4860 // No point in using the slower heap_region_containing() method, |
4861 // 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
|
4862 _scanner.set_region(_g1h->heap_region_containing_raw(obj)); |
5987 | 4863 obj->oop_iterate_backwards(&_scanner); |
342 | 4864 } |
4865 } else { | |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4866 undo_allocation(alloc_purpose, obj_ptr, word_sz); |
342 | 4867 obj = forward_ptr; |
4868 } | |
4869 return obj; | |
4870 } | |
4871 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4872 template <class T> |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4873 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
|
4874 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
|
4875 _scanned_klass->record_modified_oops(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4876 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4877 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4878 |
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4879 template <G1Barrier barrier, bool do_mark_object> |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4880 template <class T> |
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4881 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
|
4882 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
|
4883 |
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4884 if (oopDesc::is_null(heap_oop)) { |
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4885 return; |
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4886 } |
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4887 |
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4888 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
|
4889 |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4890 assert(_worker_id == _par_scan_state->queue_num(), "sanity"); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4891 |
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
4892 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
|
4893 oop forwardee; |
526 | 4894 if (obj->is_forwarded()) { |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4895 forwardee = obj->forwardee(); |
526 | 4896 } else { |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4897 forwardee = _par_scan_state->copy_to_survivor_space(obj); |
342 | 4898 } |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4899 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
|
4900 oopDesc::encode_store_heap_oop(p, forwardee); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4901 if (do_mark_object && forwardee != obj) { |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4902 // 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
|
4903 // 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
|
4904 mark_forwarded_object(obj, forwardee); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4905 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4906 |
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4907 if (barrier == G1BarrierKlass) { |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4908 do_klass_barrier(p, forwardee); |
342 | 4909 } |
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4910 } else { |
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4911 // 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
|
4912 // 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
|
4913 // 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
|
4914 if (do_mark_object) { |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4915 mark_object(obj); |
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4916 } |
526 | 4917 } |
4918 | |
17688
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4919 if (barrier == G1BarrierEvac) { |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4920 _par_scan_state->update_rs(_from, p, _worker_id); |
526 | 4921 } |
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4922 } |
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4923 |
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4924 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
|
4925 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
|
4926 |
342 | 4927 class G1ParEvacuateFollowersClosure : public VoidClosure { |
4928 protected: | |
4929 G1CollectedHeap* _g1h; | |
4930 G1ParScanThreadState* _par_scan_state; | |
4931 RefToScanQueueSet* _queues; | |
4932 ParallelTaskTerminator* _terminator; | |
4933 | |
4934 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } | |
4935 RefToScanQueueSet* queues() { return _queues; } | |
4936 ParallelTaskTerminator* terminator() { return _terminator; } | |
4937 | |
4938 public: | |
4939 G1ParEvacuateFollowersClosure(G1CollectedHeap* g1h, | |
4940 G1ParScanThreadState* par_scan_state, | |
4941 RefToScanQueueSet* queues, | |
4942 ParallelTaskTerminator* terminator) | |
4943 : _g1h(g1h), _par_scan_state(par_scan_state), | |
4944 _queues(queues), _terminator(terminator) {} | |
4945 | |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4946 void do_void(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4947 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4948 private: |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4949 inline bool offer_termination(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4950 }; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4951 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4952 bool G1ParEvacuateFollowersClosure::offer_termination() { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4953 G1ParScanThreadState* const pss = par_scan_state(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4954 pss->start_term_time(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4955 const bool res = terminator()->offer_termination(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4956 pss->end_term_time(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4957 return res; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4958 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4959 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4960 void G1ParEvacuateFollowersClosure::do_void() { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4961 StarTask stolen_task; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4962 G1ParScanThreadState* const pss = par_scan_state(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4963 pss->trim_queue(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4964 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4965 do { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4966 while (queues()->steal(pss->queue_num(), pss->hash_seed(), stolen_task)) { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4967 assert(pss->verify_task(stolen_task), "sanity"); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4968 if (stolen_task.is_narrow()) { |
1883
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4969 pss->deal_with_reference((narrowOop*) stolen_task); |
1862
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4970 } else { |
1883
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|
4971 pss->deal_with_reference((oop*) stolen_task); |
1862
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4972 } |
1883
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4973 |
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|
4974 // We've just processed a reference and we might have made |
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|
4975 // available new entries on the queues. So we have to make sure |
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|
4976 // we drain the queues as necessary. |
342 | 4977 pss->trim_queue(); |
4978 } | |
1862
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|
4979 } while (!offer_termination()); |
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|
4980 |
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|
4981 pss->retire_alloc_buffers(); |
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4982 } |
342 | 4983 |
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4984 class G1KlassScanClosure : public KlassClosure { |
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4985 G1ParCopyHelper* _closure; |
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4986 bool _process_only_dirty; |
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4987 int _count; |
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4988 public: |
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4989 G1KlassScanClosure(G1ParCopyHelper* closure, bool process_only_dirty) |
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4990 : _process_only_dirty(process_only_dirty), _closure(closure), _count(0) {} |
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4991 void do_klass(Klass* klass) { |
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4992 // If the klass has not been dirtied we know that there's |
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4993 // no references into the young gen and we can skip it. |
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4994 if (!_process_only_dirty || klass->has_modified_oops()) { |
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4995 // Clean the klass since we're going to scavenge all the metadata. |
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4996 klass->clear_modified_oops(); |
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4997 |
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4998 // Tell the closure that this klass is the Klass to scavenge |
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4999 // and is the one to dirty if oops are left pointing into the young gen. |
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5000 _closure->set_scanned_klass(klass); |
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5001 |
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5002 klass->oops_do(_closure); |
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5003 |
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5004 _closure->set_scanned_klass(NULL); |
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5005 } |
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5006 _count++; |
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|
5007 } |
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5008 }; |
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5009 |
342 | 5010 class G1ParTask : public AbstractGangTask { |
5011 protected: | |
5012 G1CollectedHeap* _g1h; | |
5013 RefToScanQueueSet *_queues; | |
5014 ParallelTaskTerminator _terminator; | |
4728
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5015 uint _n_workers; |
342 | 5016 |
5017 Mutex _stats_lock; | |
5018 Mutex* stats_lock() { return &_stats_lock; } | |
5019 | |
5020 size_t getNCards() { | |
5021 return (_g1h->capacity() + G1BlockOffsetSharedArray::N_bytes - 1) | |
5022 / G1BlockOffsetSharedArray::N_bytes; | |
5023 } | |
5024 | |
5025 public: | |
4095
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|
5026 G1ParTask(G1CollectedHeap* g1h, |
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|
5027 RefToScanQueueSet *task_queues) |
342 | 5028 : AbstractGangTask("G1 collection"), |
5029 _g1h(g1h), | |
5030 _queues(task_queues), | |
4095
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|
5031 _terminator(0, _queues), |
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|
5032 _stats_lock(Mutex::leaf, "parallel G1 stats lock", true) |
342 | 5033 {} |
5034 | |
5035 RefToScanQueueSet* queues() { return _queues; } | |
5036 | |
5037 RefToScanQueue *work_queue(int i) { | |
5038 return queues()->queue(i); | |
5039 } | |
5040 | |
4095
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|
5041 ParallelTaskTerminator* terminator() { return &_terminator; } |
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|
5042 |
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|
5043 virtual void set_for_termination(int active_workers) { |
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|
5044 // This task calls set_n_termination() in par_non_clean_card_iterate_work() |
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|
5045 // in the young space (_par_seq_tasks) in the G1 heap |
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|
5046 // for SequentialSubTasksDone. |
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|
5047 // This task also uses SubTasksDone in SharedHeap and G1CollectedHeap |
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|
5048 // both of which need setting by set_n_termination(). |
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|
5049 _g1h->SharedHeap::set_n_termination(active_workers); |
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|
5050 _g1h->set_n_termination(active_workers); |
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|
5051 terminator()->reset_for_reuse(active_workers); |
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|
5052 _n_workers = active_workers; |
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|
5053 } |
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|
5054 |
4728
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|
5055 void work(uint worker_id) { |
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|
5056 if (worker_id >= _n_workers) return; // no work needed this round |
1611 | 5057 |
5058 double start_time_ms = os::elapsedTime() * 1000.0; | |
6219
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7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
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|
5059 _g1h->g1_policy()->phase_times()->record_gc_worker_start_time(worker_id, start_time_ms); |
1611 | 5060 |
5986
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|
5061 { |
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|
5062 ResourceMark rm; |
500023bd0818
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changeset
|
5063 HandleMark hm; |
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|
5064 |
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|
5065 ReferenceProcessor* rp = _g1h->ref_processor_stw(); |
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|
5066 |
17689
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|
5067 G1ParScanThreadState pss(_g1h, worker_id, rp); |
5986
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|
5068 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, rp); |
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
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|
5069 |
5986
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|
5070 pss.set_evac_failure_closure(&evac_failure_cl); |
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|
5071 |
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|
5072 G1ParScanExtRootClosure only_scan_root_cl(_g1h, &pss, rp); |
6725
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|
5073 G1ParScanMetadataClosure only_scan_metadata_cl(_g1h, &pss, rp); |
5986
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|
5074 |
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|
5075 G1ParScanAndMarkExtRootClosure scan_mark_root_cl(_g1h, &pss, rp); |
6725
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|
5076 G1ParScanAndMarkMetadataClosure scan_mark_metadata_cl(_g1h, &pss, rp); |
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|
5077 |
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|
5078 bool only_young = _g1h->g1_policy()->gcs_are_young(); |
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|
5079 G1KlassScanClosure scan_mark_klasses_cl_s(&scan_mark_metadata_cl, false); |
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|
5080 G1KlassScanClosure only_scan_klasses_cl_s(&only_scan_metadata_cl, only_young); |
5986
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|
5081 |
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|
5082 OopClosure* scan_root_cl = &only_scan_root_cl; |
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|
5083 G1KlassScanClosure* scan_klasses_cl = &only_scan_klasses_cl_s; |
5986
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|
5084 |
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|
5085 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
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|
5086 // We also need to mark copied objects. |
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|
5087 scan_root_cl = &scan_mark_root_cl; |
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|
5088 scan_klasses_cl = &scan_mark_klasses_cl_s; |
5986
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|
5089 } |
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|
5090 |
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|
5091 G1ParPushHeapRSClosure push_heap_rs_cl(_g1h, &pss); |
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|
5092 |
12080 | 5093 // Don't scan the scavengable methods in the code cache as part |
5094 // of strong root scanning. The code roots that point into a | |
5095 // region in the collection set are scanned when we scan the | |
5096 // region's RSet. | |
5097 int so = SharedHeap::SO_AllClasses | SharedHeap::SO_Strings; | |
6725
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|
5098 |
5986
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|
5099 pss.start_strong_roots(); |
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|
5100 _g1h->g1_process_strong_roots(/* is scavenging */ true, |
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|
5101 SharedHeap::ScanningOption(so), |
5986
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|
5102 scan_root_cl, |
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|
5103 &push_heap_rs_cl, |
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|
5104 scan_klasses_cl, |
5986
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|
5105 worker_id); |
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|
5106 pss.end_strong_roots(); |
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|
5107 |
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|
5108 { |
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|
5109 double start = os::elapsedTime(); |
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|
5110 G1ParEvacuateFollowersClosure evac(_g1h, &pss, _queues, &_terminator); |
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|
5111 evac.do_void(); |
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|
5112 double elapsed_ms = (os::elapsedTime()-start)*1000.0; |
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|
5113 double term_ms = pss.term_time()*1000.0; |
6628
bb3f6194fedb
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|
5114 _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
|
5115 _g1h->g1_policy()->phase_times()->record_termination(worker_id, term_ms, pss.term_attempts()); |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5116 } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5117 _g1h->g1_policy()->record_thread_age_table(pss.age_table()); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5118 _g1h->update_surviving_young_words(pss.surviving_young_words()+1); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5119 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5120 if (ParallelGCVerbose) { |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5121 MutexLocker x(stats_lock()); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5122 pss.print_termination_stats(worker_id); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5123 } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5124 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5125 assert(pss.refs()->is_empty(), "should be empty"); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5126 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5127 // Close the inner scope so that the ResourceMark and HandleMark |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5128 // destructors are executed here and are included as part of the |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5129 // "GC Worker Time". |
342 | 5130 } |
5131 | |
1611 | 5132 double end_time_ms = os::elapsedTime() * 1000.0; |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
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diff
changeset
|
5133 _g1h->g1_policy()->phase_times()->record_gc_worker_end_time(worker_id, end_time_ms); |
342 | 5134 } |
5135 }; | |
5136 | |
5137 // *** Common G1 Evacuation Stuff | |
5138 | |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
5139 // This method is run in a GC worker. |
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
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1755
diff
changeset
|
5140 |
342 | 5141 void |
5142 G1CollectedHeap:: | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5143 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
|
5144 ScanningOption so, |
342 | 5145 OopClosure* scan_non_heap_roots, |
5146 OopsInHeapRegionClosure* scan_rs, | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5147 G1KlassScanClosure* scan_klasses, |
17844
8847586c9037
8016302: Change type of the number of GC workers to unsigned int (2)
vkempik
parents:
17833
diff
changeset
|
5148 uint worker_i) { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5149 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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diff
changeset
|
5150 // First scan the strong roots |
342 | 5151 double ext_roots_start = os::elapsedTime(); |
5152 double closure_app_time_sec = 0.0; | |
5153 | |
5154 BufferingOopClosure buf_scan_non_heap_roots(scan_non_heap_roots); | |
5155 | |
12080 | 5156 assert(so & SO_CodeCache || scan_rs != NULL, "must scan code roots somehow"); |
5157 // Walk the code cache/strong code roots w/o buffering, because StarTask | |
5158 // cannot handle unaligned oop locations. | |
5159 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
|
5160 |
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5161 process_strong_roots(false, // no scoping; this is parallel code |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5162 is_scavenging, so, |
342 | 5163 &buf_scan_non_heap_roots, |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5164 &eager_scan_code_roots, |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5165 scan_klasses |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5166 ); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
5167 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5168 // 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
|
5169 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
|
5170 // We need to treat the discovered reference lists of the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5171 // concurrent mark ref processor as roots and keep entries |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5172 // (which are added by the marking threads) on them live |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5173 // until they can be processed at the end of marking. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5174 ref_processor_cm()->weak_oops_do(&buf_scan_non_heap_roots); |
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
5175 } |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
5176 |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
5177 // Finish up any enqueued closure apps (attributed as object copy time). |
342 | 5178 buf_scan_non_heap_roots.done(); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5179 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5180 double obj_copy_time_sec = buf_scan_non_heap_roots.closure_app_seconds(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5181 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5182 g1_policy()->phase_times()->record_obj_copy_time(worker_i, obj_copy_time_sec * 1000.0); |
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
5183 |
342 | 5184 double ext_root_time_ms = |
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
5185 ((os::elapsedTime() - ext_roots_start) - obj_copy_time_sec) * 1000.0; |
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
5186 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5187 g1_policy()->phase_times()->record_ext_root_scan_time(worker_i, ext_root_time_ms); |
342 | 5188 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5189 // During conc marking we have to filter the per-thread SATB buffers |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5190 // to make sure we remove any oops into the CSet (which will show up |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5191 // as implicitly live). |
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
5192 double satb_filtering_ms = 0.0; |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5193 if (!_process_strong_tasks->is_task_claimed(G1H_PS_filter_satb_buffers)) { |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5194 if (mark_in_progress()) { |
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
5195 double satb_filter_start = os::elapsedTime(); |
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
5196 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5197 JavaThread::satb_mark_queue_set().filter_thread_buffers(); |
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
5198 |
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
parents:
6611
diff
changeset
|
5199 satb_filtering_ms = (os::elapsedTime() - satb_filter_start) * 1000.0; |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5200 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
5201 } |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5202 g1_policy()->phase_times()->record_satb_filtering_time(worker_i, satb_filtering_ms); |
342 | 5203 |
12080 | 5204 // If this is an initial mark pause, and we're not scanning |
5205 // the entire code cache, we need to mark the oops in the | |
5206 // strong code root lists for the regions that are not in | |
5207 // the collection set. | |
5208 // Note all threads participate in this set of root tasks. | |
5209 double mark_strong_code_roots_ms = 0.0; | |
5210 if (g1_policy()->during_initial_mark_pause() && !(so & SO_CodeCache)) { | |
5211 double mark_strong_roots_start = os::elapsedTime(); | |
5212 mark_strong_code_roots(worker_i); | |
5213 mark_strong_code_roots_ms = (os::elapsedTime() - mark_strong_roots_start) * 1000.0; | |
5214 } | |
5215 g1_policy()->phase_times()->record_strong_code_root_mark_time(worker_i, mark_strong_code_roots_ms); | |
5216 | |
342 | 5217 // Now scan the complement of the collection set. |
5218 if (scan_rs != NULL) { | |
12080 | 5219 g1_rem_set()->oops_into_collection_set_do(scan_rs, &eager_scan_code_roots, worker_i); |
342 | 5220 } |
5221 _process_strong_tasks->all_tasks_completed(); | |
5222 } | |
5223 | |
5224 void | |
10179
a08c80e9e1e5
8012687: Remove unused is_root checks and closures
stefank
parents:
10099
diff
changeset
|
5225 G1CollectedHeap::g1_process_weak_roots(OopClosure* root_closure) { |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5226 CodeBlobToOopClosure roots_in_blobs(root_closure, /*do_marking=*/ false); |
10179
a08c80e9e1e5
8012687: Remove unused is_root checks and closures
stefank
parents:
10099
diff
changeset
|
5227 SharedHeap::process_weak_roots(root_closure, &roots_in_blobs); |
342 | 5228 } |
5229 | |
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5230 class G1StringSymbolTableUnlinkTask : public AbstractGangTask { |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5231 private: |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5232 BoolObjectClosure* _is_alive; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5233 int _initial_string_table_size; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5234 int _initial_symbol_table_size; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5235 |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5236 bool _process_strings; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5237 int _strings_processed; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5238 int _strings_removed; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5239 |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5240 bool _process_symbols; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5241 int _symbols_processed; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5242 int _symbols_removed; |
17652
0eb64cfc0b76
8033443: Test8000311 fails after latest changes to parallelize string and symbol table unlink
tschatzl
parents:
17651
diff
changeset
|
5243 |
0eb64cfc0b76
8033443: Test8000311 fails after latest changes to parallelize string and symbol table unlink
tschatzl
parents:
17651
diff
changeset
|
5244 bool _do_in_parallel; |
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5245 public: |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5246 G1StringSymbolTableUnlinkTask(BoolObjectClosure* is_alive, bool process_strings, bool process_symbols) : |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5247 AbstractGangTask("Par String/Symbol table unlink"), _is_alive(is_alive), |
17652
0eb64cfc0b76
8033443: Test8000311 fails after latest changes to parallelize string and symbol table unlink
tschatzl
parents:
17651
diff
changeset
|
5248 _do_in_parallel(G1CollectedHeap::use_parallel_gc_threads()), |
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5249 _process_strings(process_strings), _strings_processed(0), _strings_removed(0), |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5250 _process_symbols(process_symbols), _symbols_processed(0), _symbols_removed(0) { |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5251 |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5252 _initial_string_table_size = StringTable::the_table()->table_size(); |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5253 _initial_symbol_table_size = SymbolTable::the_table()->table_size(); |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5254 if (process_strings) { |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5255 StringTable::clear_parallel_claimed_index(); |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5256 } |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5257 if (process_symbols) { |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5258 SymbolTable::clear_parallel_claimed_index(); |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
5259 } |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5260 } |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5261 |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5262 ~G1StringSymbolTableUnlinkTask() { |
17652
0eb64cfc0b76
8033443: Test8000311 fails after latest changes to parallelize string and symbol table unlink
tschatzl
parents:
17651
diff
changeset
|
5263 guarantee(!_process_strings || !_do_in_parallel || StringTable::parallel_claimed_index() >= _initial_string_table_size, |
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5264 err_msg("claim value "INT32_FORMAT" after unlink less than initial string table size "INT32_FORMAT, |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5265 StringTable::parallel_claimed_index(), _initial_string_table_size)); |
17652
0eb64cfc0b76
8033443: Test8000311 fails after latest changes to parallelize string and symbol table unlink
tschatzl
parents:
17651
diff
changeset
|
5266 guarantee(!_process_symbols || !_do_in_parallel || SymbolTable::parallel_claimed_index() >= _initial_symbol_table_size, |
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5267 err_msg("claim value "INT32_FORMAT" after unlink less than initial symbol table size "INT32_FORMAT, |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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diff
changeset
|
5268 SymbolTable::parallel_claimed_index(), _initial_symbol_table_size)); |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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diff
changeset
|
5269 } |
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
5270 |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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diff
changeset
|
5271 void work(uint worker_id) { |
17652
0eb64cfc0b76
8033443: Test8000311 fails after latest changes to parallelize string and symbol table unlink
tschatzl
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17651
diff
changeset
|
5272 if (_do_in_parallel) { |
17634
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
5273 int strings_processed = 0; |
5a32d2a3cc1e
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diff
changeset
|
5274 int strings_removed = 0; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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13400
diff
changeset
|
5275 int symbols_processed = 0; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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diff
changeset
|
5276 int symbols_removed = 0; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
5277 if (_process_strings) { |
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
5278 StringTable::possibly_parallel_unlink(_is_alive, &strings_processed, &strings_removed); |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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changeset
|
5279 Atomic::add(strings_processed, &_strings_processed); |
5a32d2a3cc1e
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diff
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|
5280 Atomic::add(strings_removed, &_strings_removed); |
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8027476: Improve performance of Stringtable unlink
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diff
changeset
|
5281 } |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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diff
changeset
|
5282 if (_process_symbols) { |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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changeset
|
5283 SymbolTable::possibly_parallel_unlink(&symbols_processed, &symbols_removed); |
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8027476: Improve performance of Stringtable unlink
tschatzl
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|
5284 Atomic::add(symbols_processed, &_symbols_processed); |
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|
5285 Atomic::add(symbols_removed, &_symbols_removed); |
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diff
changeset
|
5286 } |
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diff
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|
5287 } else { |
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diff
changeset
|
5288 if (_process_strings) { |
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changeset
|
5289 StringTable::unlink(_is_alive, &_strings_processed, &_strings_removed); |
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8027476: Improve performance of Stringtable unlink
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diff
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|
5290 } |
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diff
changeset
|
5291 if (_process_symbols) { |
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tschatzl
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diff
changeset
|
5292 SymbolTable::unlink(&_symbols_processed, &_symbols_removed); |
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tschatzl
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diff
changeset
|
5293 } |
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diff
changeset
|
5294 } |
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changeset
|
5295 } |
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changeset
|
5296 |
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|
5297 size_t strings_processed() const { return (size_t)_strings_processed; } |
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|
5298 size_t strings_removed() const { return (size_t)_strings_removed; } |
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changeset
|
5299 |
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|
5300 size_t symbols_processed() const { return (size_t)_symbols_processed; } |
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|
5301 size_t symbols_removed() const { return (size_t)_symbols_removed; } |
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changeset
|
5302 }; |
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8027476: Improve performance of Stringtable unlink
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diff
changeset
|
5303 |
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changeset
|
5304 void G1CollectedHeap::unlink_string_and_symbol_table(BoolObjectClosure* is_alive, |
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|
5305 bool process_strings, bool process_symbols) { |
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changeset
|
5306 uint n_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
5a32d2a3cc1e
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changeset
|
5307 _g1h->workers()->active_workers() : 1); |
5a32d2a3cc1e
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diff
changeset
|
5308 |
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tschatzl
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diff
changeset
|
5309 G1StringSymbolTableUnlinkTask g1_unlink_task(is_alive, process_strings, process_symbols); |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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changeset
|
5310 if (G1CollectedHeap::use_parallel_gc_threads()) { |
5a32d2a3cc1e
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tschatzl
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13400
diff
changeset
|
5311 set_par_threads(n_workers); |
5a32d2a3cc1e
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diff
changeset
|
5312 workers()->run_task(&g1_unlink_task); |
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tschatzl
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diff
changeset
|
5313 set_par_threads(0); |
5a32d2a3cc1e
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tschatzl
parents:
13400
diff
changeset
|
5314 } else { |
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
5315 g1_unlink_task.work(0); |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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diff
changeset
|
5316 } |
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tschatzl
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13400
diff
changeset
|
5317 if (G1TraceStringSymbolTableScrubbing) { |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
5318 gclog_or_tty->print_cr("Cleaned string and symbol table, " |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
5319 "strings: "SIZE_FORMAT" processed, "SIZE_FORMAT" removed, " |
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
5320 "symbols: "SIZE_FORMAT" processed, "SIZE_FORMAT" removed", |
5a32d2a3cc1e
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tschatzl
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13400
diff
changeset
|
5321 g1_unlink_task.strings_processed(), g1_unlink_task.strings_removed(), |
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
5322 g1_unlink_task.symbols_processed(), g1_unlink_task.symbols_removed()); |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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diff
changeset
|
5323 } |
17764 | 5324 |
5325 if (G1StringDedup::is_enabled()) { | |
5326 G1StringDedup::unlink(is_alive); | |
5327 } | |
17634
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8027476: Improve performance of Stringtable unlink
tschatzl
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diff
changeset
|
5328 } |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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diff
changeset
|
5329 |
17756
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5330 class RedirtyLoggedCardTableEntryFastClosure : public CardTableEntryClosure { |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5331 public: |
17844
8847586c9037
8016302: Change type of the number of GC workers to unsigned int (2)
vkempik
parents:
17833
diff
changeset
|
5332 bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
17756
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5333 *card_ptr = CardTableModRefBS::dirty_card_val(); |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5334 return true; |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5335 } |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5336 }; |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5337 |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5338 void G1CollectedHeap::redirty_logged_cards() { |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5339 guarantee(G1DeferredRSUpdate, "Must only be called when using deferred RS updates."); |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5340 double redirty_logged_cards_start = os::elapsedTime(); |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5341 |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5342 RedirtyLoggedCardTableEntryFastClosure redirty; |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5343 dirty_card_queue_set().set_closure(&redirty); |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5344 dirty_card_queue_set().apply_closure_to_all_completed_buffers(); |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5345 |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5346 DirtyCardQueueSet& dcq = JavaThread::dirty_card_queue_set(); |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5347 dcq.merge_bufferlists(&dirty_card_queue_set()); |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5348 assert(dirty_card_queue_set().completed_buffers_num() == 0, "All should be consumed"); |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5349 |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5350 g1_policy()->phase_times()->record_redirty_logged_cards_time_ms((os::elapsedTime() - redirty_logged_cards_start) * 1000.0); |
a07bea31ef35
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tschatzl
parents:
17755
diff
changeset
|
5351 } |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5352 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5353 // Weak Reference Processing support |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5354 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
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diff
changeset
|
5355 // An always "is_alive" closure that is used to preserve referents. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5356 // If the object is non-null then it's alive. Used in the preservation |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5357 // of referent objects that are pointed to by reference objects |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5358 // discovered by the CM ref processor. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5359 class G1AlwaysAliveClosure: public BoolObjectClosure { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5360 G1CollectedHeap* _g1; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5361 public: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5362 G1AlwaysAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5363 bool do_object_b(oop p) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5364 if (p != NULL) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5365 return true; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5366 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5367 return false; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5368 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
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3973
diff
changeset
|
5369 }; |
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 bool G1STWIsAliveClosure::do_object_b(oop p) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5372 // An object is reachable if it is outside the collection set, |
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
5373 // or is inside and copied. |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5374 return !_g1->obj_in_cs(p) || p->is_forwarded(); |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5375 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5376 |
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
5377 // Non Copying Keep Alive closure |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5378 class G1KeepAliveClosure: public OopClosure { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5379 G1CollectedHeap* _g1; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5380 public: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5381 G1KeepAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5382 void do_oop(narrowOop* p) { guarantee(false, "Not needed"); } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5383 void do_oop( oop* p) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5384 oop obj = *p; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5385 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
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3973
diff
changeset
|
5386 if (_g1->obj_in_cs(obj)) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5387 assert( obj->is_forwarded(), "invariant" ); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5388 *p = obj->forwardee(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5389 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5390 } |
4dfb2df418f2
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johnc
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3973
diff
changeset
|
5391 }; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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3973
diff
changeset
|
5392 |
4dfb2df418f2
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3973
diff
changeset
|
5393 // Copying Keep Alive closure - can be called from both |
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
5394 // serial and parallel code as long as different worker |
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
5395 // threads utilize different G1ParScanThreadState instances |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5396 // and different queues. |
4dfb2df418f2
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3973
diff
changeset
|
5397 |
4dfb2df418f2
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|
5398 class G1CopyingKeepAliveClosure: public OopClosure { |
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|
5399 G1CollectedHeap* _g1h; |
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|
5400 OopClosure* _copy_non_heap_obj_cl; |
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5401 OopsInHeapRegionClosure* _copy_metadata_obj_cl; |
3979
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|
5402 G1ParScanThreadState* _par_scan_state; |
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|
5403 |
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|
5404 public: |
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|
5405 G1CopyingKeepAliveClosure(G1CollectedHeap* g1h, |
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|
5406 OopClosure* non_heap_obj_cl, |
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5407 OopsInHeapRegionClosure* metadata_obj_cl, |
3979
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|
5408 G1ParScanThreadState* pss): |
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|
5409 _g1h(g1h), |
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|
5410 _copy_non_heap_obj_cl(non_heap_obj_cl), |
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5411 _copy_metadata_obj_cl(metadata_obj_cl), |
3979
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|
5412 _par_scan_state(pss) |
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|
5413 {} |
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|
5414 |
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|
5415 virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
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|
5416 virtual void do_oop( oop* p) { do_oop_work(p); } |
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|
5417 |
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|
5418 template <class T> void do_oop_work(T* p) { |
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|
5419 oop obj = oopDesc::load_decode_heap_oop(p); |
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|
5420 |
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|
5421 if (_g1h->obj_in_cs(obj)) { |
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|
5422 // If the referent object has been forwarded (either copied |
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5423 // to a new location or to itself in the event of an |
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5424 // evacuation failure) then we need to update the reference |
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5425 // field and, if both reference and referent are in the G1 |
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|
5426 // heap, update the RSet for the referent. |
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|
5427 // |
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5428 // If the referent has not been forwarded then we have to keep |
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5429 // it alive by policy. Therefore we have copy the referent. |
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|
5430 // |
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5431 // If the reference field is in the G1 heap then we can push |
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|
5432 // on the PSS queue. When the queue is drained (after each |
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|
5433 // phase of reference processing) the object and it's followers |
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|
5434 // will be copied, the reference field set to point to the |
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|
5435 // new location, and the RSet updated. Otherwise we need to |
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5436 // use the the non-heap or metadata closures directly to copy |
10405 | 5437 // the referent object and update the pointer, while avoiding |
3979
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|
5438 // updating the RSet. |
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|
5439 |
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|
5440 if (_g1h->is_in_g1_reserved(p)) { |
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|
5441 _par_scan_state->push_on_queue(p); |
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|
5442 } else { |
17935
7384f6a12fc1
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|
5443 assert(!Metaspace::contains((const void*)p), |
6725
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5444 err_msg("Otherwise need to call _copy_metadata_obj_cl->do_oop(p) " |
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5445 PTR_FORMAT, p)); |
3979
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|
5446 _copy_non_heap_obj_cl->do_oop(p); |
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|
5447 } |
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changeset
|
5448 } |
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changeset
|
5449 } |
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|
5450 }; |
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changeset
|
5451 |
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|
5452 // Serial drain queue closure. Called as the 'complete_gc' |
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|
5453 // closure for each discovered list in some of the |
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diff
changeset
|
5454 // reference processing phases. |
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changeset
|
5455 |
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|
5456 class G1STWDrainQueueClosure: public VoidClosure { |
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|
5457 protected: |
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|
5458 G1CollectedHeap* _g1h; |
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|
5459 G1ParScanThreadState* _par_scan_state; |
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|
5460 |
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changeset
|
5461 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } |
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|
5462 |
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changeset
|
5463 public: |
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diff
changeset
|
5464 G1STWDrainQueueClosure(G1CollectedHeap* g1h, G1ParScanThreadState* pss) : |
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changeset
|
5465 _g1h(g1h), |
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diff
changeset
|
5466 _par_scan_state(pss) |
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diff
changeset
|
5467 { } |
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diff
changeset
|
5468 |
4dfb2df418f2
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diff
changeset
|
5469 void do_void() { |
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diff
changeset
|
5470 G1ParScanThreadState* const pss = par_scan_state(); |
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changeset
|
5471 pss->trim_queue(); |
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diff
changeset
|
5472 } |
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diff
changeset
|
5473 }; |
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diff
changeset
|
5474 |
4dfb2df418f2
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diff
changeset
|
5475 // Parallel Reference Processing closures |
4dfb2df418f2
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diff
changeset
|
5476 |
4dfb2df418f2
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diff
changeset
|
5477 // Implementation of AbstractRefProcTaskExecutor for parallel reference |
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diff
changeset
|
5478 // processing during G1 evacuation pauses. |
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diff
changeset
|
5479 |
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diff
changeset
|
5480 class G1STWRefProcTaskExecutor: public AbstractRefProcTaskExecutor { |
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diff
changeset
|
5481 private: |
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diff
changeset
|
5482 G1CollectedHeap* _g1h; |
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diff
changeset
|
5483 RefToScanQueueSet* _queues; |
4095
bca17e38de00
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|
5484 FlexibleWorkGang* _workers; |
3979
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diff
changeset
|
5485 int _active_workers; |
4dfb2df418f2
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diff
changeset
|
5486 |
4dfb2df418f2
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diff
changeset
|
5487 public: |
4dfb2df418f2
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diff
changeset
|
5488 G1STWRefProcTaskExecutor(G1CollectedHeap* g1h, |
4095
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|
5489 FlexibleWorkGang* workers, |
3979
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diff
changeset
|
5490 RefToScanQueueSet *task_queues, |
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diff
changeset
|
5491 int n_workers) : |
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diff
changeset
|
5492 _g1h(g1h), |
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diff
changeset
|
5493 _queues(task_queues), |
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diff
changeset
|
5494 _workers(workers), |
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diff
changeset
|
5495 _active_workers(n_workers) |
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diff
changeset
|
5496 { |
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diff
changeset
|
5497 assert(n_workers > 0, "shouldn't call this otherwise"); |
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diff
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|
5498 } |
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diff
changeset
|
5499 |
4dfb2df418f2
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diff
changeset
|
5500 // Executes the given task using concurrent marking worker threads. |
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diff
changeset
|
5501 virtual void execute(ProcessTask& task); |
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diff
changeset
|
5502 virtual void execute(EnqueueTask& task); |
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diff
changeset
|
5503 }; |
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diff
changeset
|
5504 |
4dfb2df418f2
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diff
changeset
|
5505 // Gang task for possibly parallel reference processing |
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diff
changeset
|
5506 |
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diff
changeset
|
5507 class G1STWRefProcTaskProxy: public AbstractGangTask { |
4dfb2df418f2
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diff
changeset
|
5508 typedef AbstractRefProcTaskExecutor::ProcessTask ProcessTask; |
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diff
changeset
|
5509 ProcessTask& _proc_task; |
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diff
changeset
|
5510 G1CollectedHeap* _g1h; |
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diff
changeset
|
5511 RefToScanQueueSet *_task_queues; |
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diff
changeset
|
5512 ParallelTaskTerminator* _terminator; |
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diff
changeset
|
5513 |
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diff
changeset
|
5514 public: |
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diff
changeset
|
5515 G1STWRefProcTaskProxy(ProcessTask& proc_task, |
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diff
changeset
|
5516 G1CollectedHeap* g1h, |
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diff
changeset
|
5517 RefToScanQueueSet *task_queues, |
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diff
changeset
|
5518 ParallelTaskTerminator* terminator) : |
4dfb2df418f2
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diff
changeset
|
5519 AbstractGangTask("Process reference objects in parallel"), |
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diff
changeset
|
5520 _proc_task(proc_task), |
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diff
changeset
|
5521 _g1h(g1h), |
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diff
changeset
|
5522 _task_queues(task_queues), |
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diff
changeset
|
5523 _terminator(terminator) |
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diff
changeset
|
5524 {} |
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diff
changeset
|
5525 |
4728
441e946dc1af
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4711
diff
changeset
|
5526 virtual void work(uint worker_id) { |
3979
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diff
changeset
|
5527 // The reference processing task executed by a single worker. |
4dfb2df418f2
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diff
changeset
|
5528 ResourceMark rm; |
4dfb2df418f2
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diff
changeset
|
5529 HandleMark hm; |
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diff
changeset
|
5530 |
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changeset
|
5531 G1STWIsAliveClosure is_alive(_g1h); |
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|
5532 |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
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|
5533 G1ParScanThreadState pss(_g1h, worker_id, NULL); |
3979
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|
5534 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
17759
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|
5535 |
3979
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|
5536 pss.set_evac_failure_closure(&evac_failure_cl); |
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|
5537 |
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|
5538 G1ParScanExtRootClosure only_copy_non_heap_cl(_g1h, &pss, NULL); |
6725
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6964458: Reimplement class meta-data storage to use native memory
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|
5539 G1ParScanMetadataClosure only_copy_metadata_cl(_g1h, &pss, NULL); |
3979
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|
5540 |
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|
5541 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
5542 G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(_g1h, &pss, NULL); |
3979
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|
5543 |
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6484982: G1: process references during evacuation pauses
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diff
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|
5544 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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|
5545 OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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|
5546 |
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diff
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|
5547 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
4dfb2df418f2
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parents:
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|
5548 // We also need to mark copied objects. |
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diff
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|
5549 copy_non_heap_cl = ©_mark_non_heap_cl; |
6725
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|
5550 copy_metadata_cl = ©_mark_metadata_cl; |
3979
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6484982: G1: process references during evacuation pauses
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parents:
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|
5551 } |
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diff
changeset
|
5552 |
4dfb2df418f2
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|
5553 // Keep alive closure. |
6725
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|
5554 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, copy_metadata_cl, &pss); |
3979
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|
5555 |
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changeset
|
5556 // Complete GC closure |
4dfb2df418f2
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|
5557 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _task_queues, _terminator); |
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|
5558 |
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|
5559 // Call the reference processing task's work routine. |
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|
5560 _proc_task.work(worker_id, is_alive, keep_alive, drain_queue); |
3979
4dfb2df418f2
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|
5561 |
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|
5562 // Note we cannot assert that the refs array is empty here as not all |
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|
5563 // of the processing tasks (specifically phase2 - pp2_work) execute |
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changeset
|
5564 // the complete_gc closure (which ordinarily would drain the queue) so |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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|
5565 // the queue may not be empty. |
4dfb2df418f2
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parents:
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diff
changeset
|
5566 } |
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parents:
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diff
changeset
|
5567 }; |
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parents:
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diff
changeset
|
5568 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5569 // Driver routine for parallel reference processing. |
4dfb2df418f2
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parents:
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diff
changeset
|
5570 // Creates an instance of the ref processing gang |
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parents:
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diff
changeset
|
5571 // task and has the worker threads execute it. |
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|
5572 void G1STWRefProcTaskExecutor::execute(ProcessTask& proc_task) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5573 assert(_workers != NULL, "Need parallel worker threads."); |
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diff
changeset
|
5574 |
4dfb2df418f2
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diff
changeset
|
5575 ParallelTaskTerminator terminator(_active_workers, _queues); |
4dfb2df418f2
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changeset
|
5576 G1STWRefProcTaskProxy proc_task_proxy(proc_task, _g1h, _queues, &terminator); |
4dfb2df418f2
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parents:
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changeset
|
5577 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5578 _g1h->set_par_threads(_active_workers); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5579 _workers->run_task(&proc_task_proxy); |
4dfb2df418f2
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|
5580 _g1h->set_par_threads(0); |
4dfb2df418f2
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parents:
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diff
changeset
|
5581 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5582 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5583 // Gang task for parallel reference enqueueing. |
4dfb2df418f2
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parents:
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diff
changeset
|
5584 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5585 class G1STWRefEnqueueTaskProxy: public AbstractGangTask { |
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6484982: G1: process references during evacuation pauses
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|
5586 typedef AbstractRefProcTaskExecutor::EnqueueTask EnqueueTask; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5587 EnqueueTask& _enq_task; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5588 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5589 public: |
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
5590 G1STWRefEnqueueTaskProxy(EnqueueTask& enq_task) : |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5591 AbstractGangTask("Enqueue reference objects in parallel"), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5592 _enq_task(enq_task) |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5593 { } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5594 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5595 virtual void work(uint worker_id) { |
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5596 _enq_task.work(worker_id); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5597 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5598 }; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5599 |
10405 | 5600 // Driver routine for parallel reference enqueueing. |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5601 // Creates an instance of the ref enqueueing gang |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5602 // task and has the worker threads execute it. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5603 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5604 void G1STWRefProcTaskExecutor::execute(EnqueueTask& enq_task) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5605 assert(_workers != NULL, "Need parallel worker threads."); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5606 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5607 G1STWRefEnqueueTaskProxy enq_task_proxy(enq_task); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5608 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5609 _g1h->set_par_threads(_active_workers); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5610 _workers->run_task(&enq_task_proxy); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5611 _g1h->set_par_threads(0); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5612 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5613 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5614 // End of weak reference support closures |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5615 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5616 // Abstract task used to preserve (i.e. copy) any referent objects |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5617 // that are in the collection set and are pointed to by reference |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5618 // objects discovered by the CM ref processor. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5619 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5620 class G1ParPreserveCMReferentsTask: public AbstractGangTask { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5621 protected: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5622 G1CollectedHeap* _g1h; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5623 RefToScanQueueSet *_queues; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5624 ParallelTaskTerminator _terminator; |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5625 uint _n_workers; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5626 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5627 public: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5628 G1ParPreserveCMReferentsTask(G1CollectedHeap* g1h,int workers, RefToScanQueueSet *task_queues) : |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5629 AbstractGangTask("ParPreserveCMReferents"), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5630 _g1h(g1h), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5631 _queues(task_queues), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5632 _terminator(workers, _queues), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5633 _n_workers(workers) |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5634 { } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5635 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5636 void work(uint worker_id) { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5637 ResourceMark rm; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5638 HandleMark hm; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5639 |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5640 G1ParScanThreadState pss(_g1h, worker_id, NULL); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5641 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
5642 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5643 pss.set_evac_failure_closure(&evac_failure_cl); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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3973
diff
changeset
|
5644 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5645 assert(pss.refs()->is_empty(), "both queue and overflow should be empty"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5646 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5647 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5648 G1ParScanExtRootClosure only_copy_non_heap_cl(_g1h, &pss, NULL); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
changeset
|
5649 G1ParScanMetadataClosure only_copy_metadata_cl(_g1h, &pss, NULL); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5650 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5651 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
|
5652 G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(_g1h, &pss, NULL); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5653 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5654 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
|
5655 OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5656 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5657 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5658 // We also need to mark copied objects. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
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changeset
|
5659 copy_non_heap_cl = ©_mark_non_heap_cl; |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
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|
5660 copy_metadata_cl = ©_mark_metadata_cl; |
3979
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6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5661 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5662 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5663 // Is alive closure |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5664 G1AlwaysAliveClosure always_alive(_g1h); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5665 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5666 // Copying keep alive closure. Applied to referent objects that need |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5667 // to be copied. |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5668 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, copy_metadata_cl, &pss); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5669 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5670 ReferenceProcessor* rp = _g1h->ref_processor_cm(); |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5671 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5672 uint limit = ReferenceProcessor::number_of_subclasses_of_ref() * rp->max_num_q(); |
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5673 uint stride = MIN2(MAX2(_n_workers, 1U), limit); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5674 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5675 // limit is set using max_num_q() - which was set using ParallelGCThreads. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5676 // So this must be true - but assert just in case someone decides to |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5677 // change the worker ids. |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5678 assert(0 <= worker_id && worker_id < limit, "sanity"); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5679 assert(!rp->discovery_is_atomic(), "check this code"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5680 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5681 // Select discovered lists [i, i+stride, i+2*stride,...,limit) |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5682 for (uint idx = worker_id; idx < limit; idx += stride) { |
4014
bf2d2b8b1726
7095243: Disambiguate ReferenceProcessor::_discoveredSoftRefs
johnc
parents:
4013
diff
changeset
|
5683 DiscoveredList& ref_list = rp->discovered_refs()[idx]; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5684 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5685 DiscoveredListIterator iter(ref_list, &keep_alive, &always_alive); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5686 while (iter.has_next()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5687 // Since discovery is not atomic for the CM ref processor, we |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5688 // can see some null referent objects. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5689 iter.load_ptrs(DEBUG_ONLY(true)); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5690 oop ref = iter.obj(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5691 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5692 // This will filter nulls. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5693 if (iter.is_referent_alive()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5694 iter.make_referent_alive(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5695 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5696 iter.move_to_next(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5697 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5698 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5699 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5700 // Drain the queue - which may cause stealing |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5701 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _queues, &_terminator); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5702 drain_queue.do_void(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5703 // Allocation buffers were retired at the end of G1ParEvacuateFollowersClosure |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5704 assert(pss.refs()->is_empty(), "should be"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5705 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5706 }; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5707 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5708 // Weak Reference processing during an evacuation pause (part 1). |
6819 | 5709 void G1CollectedHeap::process_discovered_references(uint no_of_gc_workers) { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5710 double ref_proc_start = os::elapsedTime(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5711 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5712 ReferenceProcessor* rp = _ref_processor_stw; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5713 assert(rp->discovery_enabled(), "should have been enabled"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5714 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5715 // Any reference objects, in the collection set, that were 'discovered' |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5716 // by the CM ref processor should have already been copied (either by |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5717 // applying the external root copy closure to the discovered lists, or |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5718 // by following an RSet entry). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5719 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5720 // But some of the referents, that are in the collection set, that these |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5721 // reference objects point to may not have been copied: the STW ref |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5722 // processor would have seen that the reference object had already |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5723 // been 'discovered' and would have skipped discovering the reference, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5724 // but would not have treated the reference object as a regular oop. |
10405 | 5725 // As a result the copy closure would not have been applied to the |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5726 // referent object. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5727 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5728 // We need to explicitly copy these referent objects - the references |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5729 // will be processed at the end of remarking. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5730 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5731 // We also need to do this copying before we process the reference |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5732 // objects discovered by the STW ref processor in case one of these |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5733 // referents points to another object which is also referenced by an |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5734 // object discovered by the STW ref processor. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5735 |
4711 | 5736 assert(!G1CollectedHeap::use_parallel_gc_threads() || |
6819 | 5737 no_of_gc_workers == workers()->active_workers(), |
5738 "Need to reset active GC workers"); | |
5739 | |
5740 set_par_threads(no_of_gc_workers); | |
5741 G1ParPreserveCMReferentsTask keep_cm_referents(this, | |
5742 no_of_gc_workers, | |
5743 _task_queues); | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5744 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5745 if (G1CollectedHeap::use_parallel_gc_threads()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5746 workers()->run_task(&keep_cm_referents); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5747 } else { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5748 keep_cm_referents.work(0); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5749 } |
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 set_par_threads(0); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5752 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5753 // Closure to test whether a referent is alive. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5754 G1STWIsAliveClosure is_alive(this); |
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 // Even when parallel reference processing is enabled, the processing |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5757 // of JNI refs is serial and performed serially by the current thread |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5758 // rather than by a worker. The following PSS will be used for processing |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5759 // JNI refs. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5760 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5761 // Use only a single queue for this PSS. |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5762 G1ParScanThreadState pss(this, 0, NULL); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5763 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5764 // We do not embed a reference processor in the copying/scanning |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5765 // closures while we're actually processing the discovered |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5766 // reference objects. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5767 G1ParScanHeapEvacFailureClosure evac_failure_cl(this, &pss, NULL); |
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
5768 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5769 pss.set_evac_failure_closure(&evac_failure_cl); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5770 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5771 assert(pss.refs()->is_empty(), "pre-condition"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5772 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5773 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
|
5774 G1ParScanMetadataClosure only_copy_metadata_cl(this, &pss, NULL); |
3979
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 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
|
5777 G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(this, &pss, NULL); |
3979
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 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
|
5780 OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5781 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5782 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5783 // We also need to mark copied objects. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5784 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
|
5785 copy_metadata_cl = ©_mark_metadata_cl; |
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 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5788 // Keep alive closure. |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5789 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
|
5790 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5791 // Serial Complete GC closure |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5792 G1STWDrainQueueClosure drain_queue(this, &pss); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5793 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5794 // Setup the soft refs policy... |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5795 rp->setup_policy(false); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5796 |
10405 | 5797 ReferenceProcessorStats stats; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5798 if (!rp->processing_is_mt()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5799 // Serial reference processing... |
10405 | 5800 stats = rp->process_discovered_references(&is_alive, |
5801 &keep_alive, | |
5802 &drain_queue, | |
5803 NULL, | |
5804 _gc_timer_stw); | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5805 } else { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5806 // Parallel reference processing |
6819 | 5807 assert(rp->num_q() == no_of_gc_workers, "sanity"); |
5808 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
5809 | |
5810 G1STWRefProcTaskExecutor par_task_executor(this, workers(), _task_queues, no_of_gc_workers); | |
10405 | 5811 stats = rp->process_discovered_references(&is_alive, |
5812 &keep_alive, | |
5813 &drain_queue, | |
5814 &par_task_executor, | |
5815 _gc_timer_stw); | |
5816 } | |
5817 | |
5818 _gc_tracer_stw->report_gc_reference_stats(stats); | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5819 // We have completed copying any necessary live referent objects |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5820 // (that were not copied during the actual pause) so we can |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5821 // retire any active alloc buffers |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5822 pss.retire_alloc_buffers(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5823 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
|
5824 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5825 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
|
5826 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
|
5827 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5828 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5829 // Weak Reference processing during an evacuation pause (part 2). |
6819 | 5830 void G1CollectedHeap::enqueue_discovered_references(uint no_of_gc_workers) { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5831 double ref_enq_start = os::elapsedTime(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5832 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5833 ReferenceProcessor* rp = _ref_processor_stw; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5834 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
|
5835 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5836 // Now enqueue any remaining on the discovered lists on to |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5837 // the pending list. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5838 if (!rp->processing_is_mt()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5839 // Serial reference processing... |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5840 rp->enqueue_discovered_references(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5841 } else { |
10405 | 5842 // Parallel reference enqueueing |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5843 |
6819 | 5844 assert(no_of_gc_workers == workers()->active_workers(), |
5845 "Need to reset active workers"); | |
5846 assert(rp->num_q() == no_of_gc_workers, "sanity"); | |
5847 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
5848 | |
5849 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
|
5850 rp->enqueue_discovered_references(&par_task_executor); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5851 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5852 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5853 rp->verify_no_references_recorded(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5854 assert(!rp->discovery_enabled(), "should have been disabled"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5855 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5856 // FIXME |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5857 // 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
|
5858 // Should we do that here also? We could, but it is a serial operation |
10405 | 5859 // and could significantly increase the pause time. |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5860 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5861 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
|
5862 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
|
5863 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5864 |
10405 | 5865 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
|
5866 _expand_heap_after_alloc_failure = true; |
10405 | 5867 _evacuation_failed = false; |
342 | 5868 |
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5869 // 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
|
5870 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
|
5871 |
342 | 5872 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
|
5873 |
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5874 // Disable the hot card cache. |
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5875 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
|
5876 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
|
5877 hot_card_cache->set_use_cache(false); |
889 | 5878 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5879 uint n_workers; |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5880 if (G1CollectedHeap::use_parallel_gc_threads()) { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5881 n_workers = |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5882 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5883 workers()->active_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5884 Threads::number_of_non_daemon_threads()); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5885 assert(UseDynamicNumberOfGCThreads || |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5886 n_workers == workers()->total_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5887 "If not dynamic should be using all the workers"); |
4711 | 5888 workers()->set_active_workers(n_workers); |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5889 set_par_threads(n_workers); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5890 } else { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5891 assert(n_par_threads() == 0, |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5892 "Should be the original non-parallel value"); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5893 n_workers = 1; |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5894 } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5895 |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5896 G1ParTask g1_par_task(this, _task_queues); |
342 | 5897 |
5898 init_for_evac_failure(NULL); | |
5899 | |
5900 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
|
5901 |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5902 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
|
5903 double start_par_time_sec = os::elapsedTime(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5904 double end_par_time_sec; |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5905 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5906 { |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5907 StrongRootsScope srs(this); |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5908 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5909 if (G1CollectedHeap::use_parallel_gc_threads()) { |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5910 // 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
|
5911 if (ParallelGCVerbose) G1ParScanThreadState::print_termination_stats_hdr(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5912 // These tasks use ShareHeap::_process_strong_tasks |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5913 assert(UseDynamicNumberOfGCThreads || |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5914 workers()->active_workers() == workers()->total_workers(), |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5915 "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
|
5916 workers()->run_task(&g1_par_task); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5917 } else { |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5918 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
|
5919 g1_par_task.work(0); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5920 } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5921 end_par_time_sec = os::elapsedTime(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5922 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5923 // 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
|
5924 // 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
|
5925 // 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
|
5926 // 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
|
5927 // reported parallel time. |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5928 } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5929 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5930 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
|
5931 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
|
5932 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5933 double code_root_fixup_time_ms = |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5934 (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
|
5935 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
|
5936 |
342 | 5937 set_par_threads(0); |
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5938 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5939 // Process any discovered reference objects - we have |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5940 // to do this _before_ we retire the GC alloc regions |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5941 // as we may have to copy some 'reachable' referent |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5942 // objects (and their reachable sub-graphs) that were |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5943 // not copied during the pause. |
6819 | 5944 process_discovered_references(n_workers); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5945 |
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5946 // Weak root processing. |
342 | 5947 { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5948 G1STWIsAliveClosure is_alive(this); |
342 | 5949 G1KeepAliveClosure keep_alive(this); |
5950 JNIHandles::weak_oops_do(&is_alive, &keep_alive); | |
17764 | 5951 if (G1StringDedup::is_enabled()) { |
5952 G1StringDedup::unlink_or_oops_do(&is_alive, &keep_alive); | |
5953 } | |
342 | 5954 } |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5955 |
10405 | 5956 release_gc_alloc_regions(n_workers, evacuation_info); |
342 | 5957 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
|
5958 |
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5959 // 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
|
5960 // 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
|
5961 // 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
|
5962 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
|
5963 hot_card_cache->set_use_cache(true); |
342 | 5964 |
12080 | 5965 // Migrate the strong code roots attached to each region in |
5966 // the collection set. Ideally we would like to do this | |
5967 // after we have finished the scanning/evacuation of the | |
5968 // strong code roots for a particular heap region. | |
5969 migrate_strong_code_roots(); | |
5970 | |
17753
191174b49bec
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
17749
diff
changeset
|
5971 purge_code_root_memory(); |
191174b49bec
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
17749
diff
changeset
|
5972 |
12080 | 5973 if (g1_policy()->during_initial_mark_pause()) { |
5974 // Reset the claim values set during marking the strong code roots | |
5975 reset_heap_region_claim_values(); | |
5976 } | |
5977 | |
342 | 5978 finalize_for_evac_failure(); |
5979 | |
5980 if (evacuation_failed()) { | |
5981 remove_self_forwarding_pointers(); | |
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5982 |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5983 // Reset the G1EvacuationFailureALot counters and flags |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5984 // 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
|
5985 // evacuation failure occurs. |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5986 NOT_PRODUCT(reset_evacuation_should_fail();) |
342 | 5987 } |
5988 | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5989 // Enqueue any remaining references remaining on the STW |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5990 // reference processor's discovered lists. We need to do |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5991 // this after the card table is cleaned (and verified) as |
10405 | 5992 // the act of enqueueing entries on to the pending list |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5993 // will log these updates (and dirty their associated |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5994 // cards). We need these updates logged to update any |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5995 // RSets. |
6819 | 5996 enqueue_discovered_references(n_workers); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5997 |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5998 if (G1DeferredRSUpdate) { |
17756
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5999 redirty_logged_cards(); |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
6000 } |
342 | 6001 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
6002 } | |
6003 | |
2152 | 6004 void G1CollectedHeap::free_region(HeapRegion* hr, |
6005 FreeRegionList* free_list, | |
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
6006 bool par, |
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
6007 bool locked) { |
2152 | 6008 assert(!hr->isHumongous(), "this is only for non-humongous regions"); |
6009 assert(!hr->is_empty(), "the region should not be empty"); | |
6010 assert(free_list != NULL, "pre-condition"); | |
6011 | |
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
6012 // 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
|
6013 // 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
|
6014 // (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
|
6015 if (!hr->is_young()) { |
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
6016 _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
|
6017 } |
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
6018 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
|
6019 free_list->add_ordered(hr); |
2152 | 6020 } |
6021 | |
6022 void G1CollectedHeap::free_humongous_region(HeapRegion* hr, | |
6023 FreeRegionList* free_list, | |
6024 bool par) { | |
6025 assert(hr->startsHumongous(), "this is only for starts humongous regions"); | |
6026 assert(free_list != NULL, "pre-condition"); | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6027 |
2152 | 6028 size_t hr_capacity = hr->capacity(); |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
6029 // 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
|
6030 // otherwise the information will be gone. |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
6031 uint last_index = hr->last_hc_index(); |
2152 | 6032 hr->set_notHumongous(); |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6033 free_region(hr, free_list, par); |
2152 | 6034 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
6035 uint i = hr->hrs_index() + 1; |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
6036 while (i < last_index) { |
3766 | 6037 HeapRegion* curr_hr = region_at(i); |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
6038 assert(curr_hr->continuesHumongous(), "invariant"); |
2152 | 6039 curr_hr->set_notHumongous(); |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6040 free_region(curr_hr, free_list, par); |
2152 | 6041 i += 1; |
6042 } | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6043 } |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6044 |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6045 void G1CollectedHeap::remove_from_old_sets(const HeapRegionSetCount& old_regions_removed, |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6046 const HeapRegionSetCount& humongous_regions_removed) { |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6047 if (old_regions_removed.length() > 0 || humongous_regions_removed.length() > 0) { |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6048 MutexLockerEx x(OldSets_lock, Mutex::_no_safepoint_check_flag); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6049 _old_set.bulk_remove(old_regions_removed); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6050 _humongous_set.bulk_remove(humongous_regions_removed); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6051 } |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6052 |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6053 } |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6054 |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6055 void G1CollectedHeap::prepend_to_freelist(FreeRegionList* list) { |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6056 assert(list != NULL, "list can't be null"); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6057 if (!list->is_empty()) { |
2152 | 6058 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
|
6059 _free_list.add_ordered(list); |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6060 } |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6061 } |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6062 |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6063 void G1CollectedHeap::decrement_summary_bytes(size_t bytes) { |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6064 assert(_summary_bytes_used >= bytes, |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6065 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
|
6066 _summary_bytes_used, bytes)); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6067 _summary_bytes_used -= bytes; |
342 | 6068 } |
6069 | |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6070 class G1ParCleanupCTTask : public AbstractGangTask { |
12343 | 6071 G1SATBCardTableModRefBS* _ct_bs; |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6072 G1CollectedHeap* _g1h; |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6073 HeapRegion* volatile _su_head; |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6074 public: |
12343 | 6075 G1ParCleanupCTTask(G1SATBCardTableModRefBS* ct_bs, |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6076 G1CollectedHeap* g1h) : |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6077 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
|
6078 _ct_bs(ct_bs), _g1h(g1h) { } |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6079 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
6080 void work(uint worker_id) { |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6081 HeapRegion* r; |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6082 while (r = _g1h->pop_dirty_cards_region()) { |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6083 clear_cards(r); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6084 } |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6085 } |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6086 |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6087 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
|
6088 // 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
|
6089 if (!r->is_survivor()) { |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6090 _ct_bs->clear(MemRegion(r->bottom(), r->end())); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6091 } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6092 } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6093 }; |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6094 |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6095 #ifndef PRODUCT |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6096 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
|
6097 G1CollectedHeap* _g1h; |
12343 | 6098 G1SATBCardTableModRefBS* _ct_bs; |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6099 public: |
12343 | 6100 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
|
6101 : _g1h(g1h), _ct_bs(ct_bs) { } |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6102 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
|
6103 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
|
6104 _g1h->verify_dirty_region(r); |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6105 } else { |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6106 _g1h->verify_not_dirty_region(r); |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6107 } |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6108 return false; |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6109 } |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6110 }; |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6111 |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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|
6112 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...)
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|
6113 // All of the region should be clean. |
12343 | 6114 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
3317
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7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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|
6115 MemRegion mr(hr->bottom(), hr->end()); |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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|
6116 ct_bs->verify_not_dirty_region(mr); |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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|
6117 } |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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|
6118 |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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|
6119 void G1CollectedHeap::verify_dirty_region(HeapRegion* hr) { |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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|
6120 // We cannot guarantee that [bottom(),end()] is dirty. Threads |
063382f9b575
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|
6121 // dirty allocated blocks as they allocate them. The thread that |
063382f9b575
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|
6122 // retires each region and replaces it with a new one will do a |
063382f9b575
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|
6123 // maximal allocation to fill in [pre_dummy_top(),end()] but will |
063382f9b575
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|
6124 // 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...)
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|
6125 // a lock). So we can only verify that [bottom(),pre_dummy_top()] |
063382f9b575
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|
6126 // is dirty. |
12343 | 6127 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
3317
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|
6128 MemRegion mr(hr->bottom(), hr->pre_dummy_top()); |
12835
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8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
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diff
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|
6129 if (hr->is_young()) { |
69944b868a32
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|
6130 ct_bs->verify_g1_young_region(mr); |
69944b868a32
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diff
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|
6131 } else { |
69944b868a32
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|
6132 ct_bs->verify_dirty_region(mr); |
69944b868a32
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|
6133 } |
3317
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|
6134 } |
063382f9b575
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|
6135 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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|
6136 void G1CollectedHeap::verify_dirty_young_list(HeapRegion* head) { |
12343 | 6137 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
2433
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|
6138 for (HeapRegion* hr = head; hr != NULL; hr = hr->get_next_young_region()) { |
3317
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|
6139 verify_dirty_region(hr); |
2433
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|
6140 } |
abdfc822206f
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|
6141 } |
abdfc822206f
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|
6142 |
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|
6143 void G1CollectedHeap::verify_dirty_young_regions() { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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|
6144 verify_dirty_young_list(_young_list->first_region()); |
abdfc822206f
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|
6145 } |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
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|
6146 #endif |
8624da129f0b
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|
6147 |
342 | 6148 void G1CollectedHeap::cleanUpCardTable() { |
12343 | 6149 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
342 | 6150 double start = os::elapsedTime(); |
6151 | |
4023 | 6152 { |
6153 // Iterate over the dirty cards region list. | |
6154 G1ParCleanupCTTask cleanup_task(ct_bs, this); | |
6155 | |
4711 | 6156 if (G1CollectedHeap::use_parallel_gc_threads()) { |
6157 set_par_threads(); | |
4023 | 6158 workers()->run_task(&cleanup_task); |
6159 set_par_threads(0); | |
6160 } else { | |
6161 while (_dirty_cards_region_list) { | |
6162 HeapRegion* r = _dirty_cards_region_list; | |
6163 cleanup_task.clear_cards(r); | |
6164 _dirty_cards_region_list = r->get_next_dirty_cards_region(); | |
6165 if (_dirty_cards_region_list == r) { | |
6166 // The last region. | |
6167 _dirty_cards_region_list = NULL; | |
6168 } | |
6169 r->set_next_dirty_cards_region(NULL); | |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
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diff
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|
6170 } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
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diff
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|
6171 } |
4023 | 6172 #ifndef PRODUCT |
6173 if (G1VerifyCTCleanup || VerifyAfterGC) { | |
6174 G1VerifyCardTableCleanup cleanup_verifier(this, ct_bs); | |
6175 heap_region_iterate(&cleanup_verifier); | |
6176 } | |
6177 #endif | |
940
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|
6178 } |
1394
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6179 |
342 | 6180 double elapsed = os::elapsedTime() - start; |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
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6188
diff
changeset
|
6181 g1_policy()->phase_times()->record_clear_ct_time(elapsed * 1000.0); |
342 | 6182 } |
6183 | |
10405 | 6184 void G1CollectedHeap::free_collection_set(HeapRegion* cs_head, EvacuationInfo& evacuation_info) { |
2152 | 6185 size_t pre_used = 0; |
6186 FreeRegionList local_free_list("Local List for CSet Freeing"); | |
6187 | |
342 | 6188 double young_time_ms = 0.0; |
6189 double non_young_time_ms = 0.0; | |
6190 | |
1394
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6191 // 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
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|
6192 // 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
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|
6193 // 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
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|
6194 _young_list->clear(); |
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|
6195 |
342 | 6196 G1CollectorPolicy* policy = g1_policy(); |
6197 | |
6198 double start_sec = os::elapsedTime(); | |
6199 bool non_young = true; | |
6200 | |
6201 HeapRegion* cur = cs_head; | |
6202 int age_bound = -1; | |
6203 size_t rs_lengths = 0; | |
6204 | |
6205 while (cur != NULL) { | |
2361 | 6206 assert(!is_on_master_free_list(cur), "sanity"); |
342 | 6207 if (non_young) { |
6208 if (cur->is_young()) { | |
6209 double end_sec = os::elapsedTime(); | |
6210 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
6211 non_young_time_ms += elapsed_ms; | |
6212 | |
6213 start_sec = os::elapsedTime(); | |
6214 non_young = false; | |
6215 } | |
6216 } else { | |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
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|
6217 if (!cur->is_young()) { |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
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4095
diff
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|
6218 double end_sec = os::elapsedTime(); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
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diff
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|
6219 double elapsed_ms = (end_sec - start_sec) * 1000.0; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
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|
6220 young_time_ms += elapsed_ms; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
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|
6221 |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
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4095
diff
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|
6222 start_sec = os::elapsedTime(); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
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|
6223 non_young = true; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
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|
6224 } |
342 | 6225 } |
6226 | |
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
6227 rs_lengths += cur->rem_set()->occupied_locked(); |
342 | 6228 |
6229 HeapRegion* next = cur->next_in_collection_set(); | |
6230 assert(cur->in_collection_set(), "bad CS"); | |
6231 cur->set_next_in_collection_set(NULL); | |
6232 cur->set_in_collection_set(false); | |
6233 | |
6234 if (cur->is_young()) { | |
6235 int index = cur->young_index_in_cset(); | |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
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4073
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|
6236 assert(index != -1, "invariant"); |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
6237 assert((uint) index < policy->young_cset_region_length(), "invariant"); |
342 | 6238 size_t words_survived = _surviving_young_words[index]; |
6239 cur->record_surv_words_in_group(words_survived); | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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1391
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|
6240 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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1391
diff
changeset
|
6241 // At this point the we have 'popped' cur from the collection set |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
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|
6242 // (linked via next_in_collection_set()) but it is still in the |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
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|
6243 // young list (linked via next_young_region()). Clear the |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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1391
diff
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|
6244 // _next_young_region field. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
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diff
changeset
|
6245 cur->set_next_young_region(NULL); |
342 | 6246 } else { |
6247 int index = cur->young_index_in_cset(); | |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
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4073
diff
changeset
|
6248 assert(index == -1, "invariant"); |
342 | 6249 } |
6250 | |
6251 assert( (cur->is_young() && cur->young_index_in_cset() > -1) || | |
6252 (!cur->is_young() && cur->young_index_in_cset() == -1), | |
6253 "invariant" ); | |
6254 | |
6255 if (!cur->evacuation_failed()) { | |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
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|
6256 MemRegion used_mr = cur->used_region(); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
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|
6257 |
342 | 6258 // And the region is empty. |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6259 assert(!used_mr.is_empty(), "Should not have empty regions in a CS."); |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6260 pre_used += cur->used(); |
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
6261 free_region(cur, &local_free_list, false /* par */, true /* locked */); |
342 | 6262 } else { |
6263 cur->uninstall_surv_rate_group(); | |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
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4073
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|
6264 if (cur->is_young()) { |
342 | 6265 cur->set_young_index_in_cset(-1); |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
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4073
diff
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|
6266 } |
342 | 6267 cur->set_not_young(); |
6268 cur->set_evacuation_failed(false); | |
4072 | 6269 // The region is now considered to be old. |
6270 _old_set.add(cur); | |
10405 | 6271 evacuation_info.increment_collectionset_used_after(cur->used()); |
342 | 6272 } |
6273 cur = next; | |
6274 } | |
6275 | |
10405 | 6276 evacuation_info.set_regions_freed(local_free_list.length()); |
342 | 6277 policy->record_max_rs_lengths(rs_lengths); |
6278 policy->cset_regions_freed(); | |
6279 | |
6280 double end_sec = os::elapsedTime(); | |
6281 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
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4095
diff
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|
6282 |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
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4095
diff
changeset
|
6283 if (non_young) { |
342 | 6284 non_young_time_ms += elapsed_ms; |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
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4095
diff
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|
6285 } else { |
342 | 6286 young_time_ms += elapsed_ms; |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
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|
6287 } |
342 | 6288 |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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17727
diff
changeset
|
6289 prepend_to_freelist(&local_free_list); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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17727
diff
changeset
|
6290 decrement_summary_bytes(pre_used); |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
6291 policy->phase_times()->record_young_free_cset_time_ms(young_time_ms); |
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
6292 policy->phase_times()->record_non_young_free_cset_time_ms(non_young_time_ms); |
342 | 6293 } |
6294 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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1391
diff
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|
6295 // This routine is similar to the above but does not record |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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1391
diff
changeset
|
6296 // any policy statistics or update free lists; we are abandoning |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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1391
diff
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|
6297 // the current incremental collection set in preparation of a |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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1391
diff
changeset
|
6298 // full collection. After the full GC we will start to build up |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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1391
diff
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|
6299 // the incremental collection set again. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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1391
diff
changeset
|
6300 // This is only called when we're doing a full collection |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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1391
diff
changeset
|
6301 // and is immediately followed by the tearing down of the young list. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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1391
diff
changeset
|
6302 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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1391
diff
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|
6303 void G1CollectedHeap::abandon_collection_set(HeapRegion* cs_head) { |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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1391
diff
changeset
|
6304 HeapRegion* cur = cs_head; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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1391
diff
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|
6305 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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1391
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|
6306 while (cur != NULL) { |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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1391
diff
changeset
|
6307 HeapRegion* next = cur->next_in_collection_set(); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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1391
diff
changeset
|
6308 assert(cur->in_collection_set(), "bad CS"); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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1391
diff
changeset
|
6309 cur->set_next_in_collection_set(NULL); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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1391
diff
changeset
|
6310 cur->set_in_collection_set(false); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6311 cur->set_young_index_in_cset(-1); |
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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changeset
|
6312 cur = next; |
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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diff
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|
6313 } |
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6314 } |
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|
6315 |
2152 | 6316 void G1CollectedHeap::set_free_regions_coming() { |
6317 if (G1ConcRegionFreeingVerbose) { | |
6318 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
6319 "setting free regions coming"); | |
6320 } | |
6321 | |
6322 assert(!free_regions_coming(), "pre-condition"); | |
6323 _free_regions_coming = true; | |
342 | 6324 } |
6325 | |
2152 | 6326 void G1CollectedHeap::reset_free_regions_coming() { |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
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|
6327 assert(free_regions_coming(), "pre-condition"); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
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|
6328 |
2152 | 6329 { |
6330 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
6331 _free_regions_coming = false; | |
6332 SecondaryFreeList_lock->notify_all(); | |
6333 } | |
6334 | |
6335 if (G1ConcRegionFreeingVerbose) { | |
6336 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
6337 "reset free regions coming"); | |
342 | 6338 } |
6339 } | |
6340 | |
2152 | 6341 void G1CollectedHeap::wait_while_free_regions_coming() { |
6342 // Most of the time we won't have to wait, so let's do a quick test | |
6343 // first before we take the lock. | |
6344 if (!free_regions_coming()) { | |
6345 return; | |
6346 } | |
6347 | |
6348 if (G1ConcRegionFreeingVerbose) { | |
6349 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
6350 "waiting for free regions"); | |
342 | 6351 } |
6352 | |
6353 { | |
2152 | 6354 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
6355 while (free_regions_coming()) { | |
6356 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
342 | 6357 } |
2152 | 6358 } |
6359 | |
6360 if (G1ConcRegionFreeingVerbose) { | |
6361 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
6362 "done waiting for free regions"); | |
6363 } | |
342 | 6364 } |
6365 | |
6366 void G1CollectedHeap::set_region_short_lived_locked(HeapRegion* hr) { | |
6367 assert(heap_lock_held_for_gc(), | |
6368 "the heap lock should already be held by or for this thread"); | |
6369 _young_list->push_region(hr); | |
6370 } | |
6371 | |
6372 class NoYoungRegionsClosure: public HeapRegionClosure { | |
6373 private: | |
6374 bool _success; | |
6375 public: | |
6376 NoYoungRegionsClosure() : _success(true) { } | |
6377 bool doHeapRegion(HeapRegion* r) { | |
6378 if (r->is_young()) { | |
6379 gclog_or_tty->print_cr("Region ["PTR_FORMAT", "PTR_FORMAT") tagged as young", | |
6380 r->bottom(), r->end()); | |
6381 _success = false; | |
6382 } | |
6383 return false; | |
6384 } | |
6385 bool success() { return _success; } | |
6386 }; | |
6387 | |
1394
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6388 bool G1CollectedHeap::check_young_list_empty(bool check_heap, bool check_sample) { |
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|
6389 bool ret = _young_list->check_list_empty(check_sample); |
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|
6390 |
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6391 if (check_heap) { |
342 | 6392 NoYoungRegionsClosure closure; |
6393 heap_region_iterate(&closure); | |
6394 ret = ret && closure.success(); | |
6395 } | |
6396 | |
6397 return ret; | |
6398 } | |
6399 | |
4072 | 6400 class TearDownRegionSetsClosure : public HeapRegionClosure { |
6401 private: | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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|
6402 HeapRegionSet *_old_set; |
2152 | 6403 |
342 | 6404 public: |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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|
6405 TearDownRegionSetsClosure(HeapRegionSet* old_set) : _old_set(old_set) { } |
2152 | 6406 |
342 | 6407 bool doHeapRegion(HeapRegion* r) { |
4072 | 6408 if (r->is_empty()) { |
6409 // We ignore empty regions, we'll empty the free list afterwards | |
6410 } else if (r->is_young()) { | |
6411 // We ignore young regions, we'll empty the young list afterwards | |
6412 } else if (r->isHumongous()) { | |
6413 // We ignore humongous regions, we're not tearing down the | |
6414 // humongous region set | |
342 | 6415 } else { |
4072 | 6416 // The rest should be old |
6417 _old_set->remove(r); | |
342 | 6418 } |
6419 return false; | |
6420 } | |
6421 | |
4072 | 6422 ~TearDownRegionSetsClosure() { |
6423 assert(_old_set->is_empty(), "post-condition"); | |
2152 | 6424 } |
342 | 6425 }; |
6426 | |
4072 | 6427 void G1CollectedHeap::tear_down_region_sets(bool free_list_only) { |
6428 assert_at_safepoint(true /* should_be_vm_thread */); | |
6429 | |
6430 if (!free_list_only) { | |
6431 TearDownRegionSetsClosure cl(&_old_set); | |
6432 heap_region_iterate(&cl); | |
6433 | |
17764 | 6434 // Note that emptying the _young_list is postponed and instead done as |
6435 // the first step when rebuilding the regions sets again. The reason for | |
6436 // this is that during a full GC string deduplication needs to know if | |
6437 // a collected region was young or old when the full GC was initiated. | |
4072 | 6438 } |
6439 _free_list.remove_all(); | |
6440 } | |
6441 | |
6442 class RebuildRegionSetsClosure : public HeapRegionClosure { | |
6443 private: | |
6444 bool _free_list_only; | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
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diff
changeset
|
6445 HeapRegionSet* _old_set; |
4072 | 6446 FreeRegionList* _free_list; |
6447 size_t _total_used; | |
6448 | |
6449 public: | |
6450 RebuildRegionSetsClosure(bool free_list_only, | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6451 HeapRegionSet* old_set, FreeRegionList* free_list) : |
4072 | 6452 _free_list_only(free_list_only), |
6453 _old_set(old_set), _free_list(free_list), _total_used(0) { | |
6454 assert(_free_list->is_empty(), "pre-condition"); | |
6455 if (!free_list_only) { | |
6456 assert(_old_set->is_empty(), "pre-condition"); | |
6457 } | |
6458 } | |
6459 | |
6460 bool doHeapRegion(HeapRegion* r) { | |
6461 if (r->continuesHumongous()) { | |
6462 return false; | |
6463 } | |
6464 | |
6465 if (r->is_empty()) { | |
6466 // Add free regions to the free list | |
6467 _free_list->add_as_tail(r); | |
6468 } else if (!_free_list_only) { | |
6469 assert(!r->is_young(), "we should not come across young regions"); | |
6470 | |
6471 if (r->isHumongous()) { | |
6472 // We ignore humongous regions, we left the humongous set unchanged | |
6473 } else { | |
6474 // The rest should be old, add them to the old set | |
6475 _old_set->add(r); | |
6476 } | |
6477 _total_used += r->used(); | |
6478 } | |
6479 | |
6480 return false; | |
6481 } | |
6482 | |
6483 size_t total_used() { | |
6484 return _total_used; | |
6485 } | |
6486 }; | |
6487 | |
6488 void G1CollectedHeap::rebuild_region_sets(bool free_list_only) { | |
6489 assert_at_safepoint(true /* should_be_vm_thread */); | |
6490 | |
17764 | 6491 if (!free_list_only) { |
6492 _young_list->empty_list(); | |
6493 } | |
6494 | |
4072 | 6495 RebuildRegionSetsClosure cl(free_list_only, &_old_set, &_free_list); |
6496 heap_region_iterate(&cl); | |
6497 | |
6498 if (!free_list_only) { | |
6499 _summary_bytes_used = cl.total_used(); | |
6500 } | |
6501 assert(_summary_bytes_used == recalculate_used(), | |
6502 err_msg("inconsistent _summary_bytes_used, " | |
6503 "value: "SIZE_FORMAT" recalculated: "SIZE_FORMAT, | |
6504 _summary_bytes_used, recalculate_used())); | |
342 | 6505 } |
6506 | |
6507 void G1CollectedHeap::set_refine_cte_cl_concurrency(bool concurrent) { | |
6508 _refine_cte_cl->set_concurrent(concurrent); | |
6509 } | |
6510 | |
6511 bool G1CollectedHeap::is_in_closed_subset(const void* p) const { | |
6512 HeapRegion* hr = heap_region_containing(p); | |
6513 if (hr == NULL) { | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
6514 return false; |
342 | 6515 } else { |
6516 return hr->is_in(p); | |
6517 } | |
6518 } | |
2152 | 6519 |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
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3824
diff
changeset
|
6520 // 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
|
6521 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6522 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
|
6523 bool force) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6524 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
|
6525 assert(!force || g1_policy()->can_expand_young_list(), |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6526 "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
|
6527 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
|
6528 if (force || !young_list_full) { |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6529 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
|
6530 false /* is_old */, |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6531 false /* do_expand */); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6532 if (new_alloc_region != NULL) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6533 set_region_short_lived_locked(new_alloc_region); |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6534 _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
|
6535 return new_alloc_region; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6536 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6537 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6538 return NULL; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6539 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6540 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6541 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
|
6542 size_t allocated_bytes) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6543 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
|
6544 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
|
6545 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6546 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
|
6547 _summary_bytes_used += allocated_bytes; |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6548 _hr_printer.retire(alloc_region); |
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6549 // 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
|
6550 // 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
|
6551 // used space has been recored in _summary_bytes_used. |
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6552 g1mm()->update_eden_size(); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6553 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6554 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
2432
diff
changeset
|
6555 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
|
6556 bool force) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6557 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
|
6558 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6559 |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6560 void G1CollectedHeap::set_par_threads() { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6561 // 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
|
6562 // in the workgroup. |
4711 | 6563 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
|
6564 uint n_workers = workers()->active_workers(); |
4711 | 6565 assert(UseDynamicNumberOfGCThreads || |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6566 n_workers == workers()->total_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6567 "Otherwise should be using the total number of workers"); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6568 if (n_workers == 0) { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6569 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
|
6570 n_workers = ParallelGCThreads; |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6571 workers()->set_active_workers(n_workers); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6572 } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6573 set_par_threads(n_workers); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
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4090
diff
changeset
|
6574 } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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4090
diff
changeset
|
6575 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6576 void MutatorAllocRegion::retire_region(HeapRegion* alloc_region, |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6577 size_t allocated_bytes) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6578 _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
|
6579 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6580 |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
diff
changeset
|
6581 // 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
|
6582 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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parents:
3824
diff
changeset
|
6583 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
|
6584 uint count, |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
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3824
diff
changeset
|
6585 GCAllocPurpose ap) { |
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6586 assert(FreeList_lock->owned_by_self(), "pre-condition"); |
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6587 |
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|
6588 if (count < g1_policy()->max_regions(ap)) { |
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
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|
6589 bool survivor = (ap == GCAllocForSurvived); |
3830
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6590 HeapRegion* new_alloc_region = new_region(word_size, |
17773
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|
6591 !survivor, |
3830
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|
6592 true /* do_expand */); |
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|
6593 if (new_alloc_region != NULL) { |
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6594 // We really only need to do this for old regions given that we |
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6595 // should never scan survivors. But it doesn't hurt to do it |
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6596 // for survivors too. |
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|
6597 new_alloc_region->set_saved_mark(); |
17773
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6598 if (survivor) { |
3830
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6599 new_alloc_region->set_survivor(); |
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6600 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Survivor); |
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|
6601 } else { |
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6602 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Old); |
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|
6603 } |
4787
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6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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|
6604 bool during_im = g1_policy()->during_initial_mark_pause(); |
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6605 new_alloc_region->note_start_of_copying(during_im); |
3830
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6606 return new_alloc_region; |
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|
6607 } else { |
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|
6608 g1_policy()->note_alloc_region_limit_reached(ap); |
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|
6609 } |
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|
6610 } |
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|
6611 return NULL; |
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|
6612 } |
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|
6613 |
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|
6614 void G1CollectedHeap::retire_gc_alloc_region(HeapRegion* alloc_region, |
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6615 size_t allocated_bytes, |
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6616 GCAllocPurpose ap) { |
4787
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|
6617 bool during_im = g1_policy()->during_initial_mark_pause(); |
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6618 alloc_region->note_end_of_copying(during_im); |
3830
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|
6619 g1_policy()->record_bytes_copied_during_gc(allocated_bytes); |
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6620 if (ap == GCAllocForSurvived) { |
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|
6621 young_list()->add_survivor_region(alloc_region); |
4072 | 6622 } else { |
6623 _old_set.add(alloc_region); | |
3830
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|
6624 } |
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|
6625 _hr_printer.retire(alloc_region); |
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|
6626 } |
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|
6627 |
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|
6628 HeapRegion* SurvivorGCAllocRegion::allocate_new_region(size_t word_size, |
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|
6629 bool force) { |
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|
6630 assert(!force, "not supported for GC alloc regions"); |
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6631 return _g1h->new_gc_alloc_region(word_size, count(), GCAllocForSurvived); |
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|
6632 } |
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|
6633 |
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|
6634 void SurvivorGCAllocRegion::retire_region(HeapRegion* alloc_region, |
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|
6635 size_t allocated_bytes) { |
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|
6636 _g1h->retire_gc_alloc_region(alloc_region, allocated_bytes, |
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|
6637 GCAllocForSurvived); |
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|
6638 } |
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|
6639 |
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|
6640 HeapRegion* OldGCAllocRegion::allocate_new_region(size_t word_size, |
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|
6641 bool force) { |
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|
6642 assert(!force, "not supported for GC alloc regions"); |
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|
6643 return _g1h->new_gc_alloc_region(word_size, count(), GCAllocForTenured); |
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|
6644 } |
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|
6645 |
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|
6646 void OldGCAllocRegion::retire_region(HeapRegion* alloc_region, |
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|
6647 size_t allocated_bytes) { |
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|
6648 _g1h->retire_gc_alloc_region(alloc_region, allocated_bytes, |
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|
6649 GCAllocForTenured); |
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|
6650 } |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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2432
diff
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|
6651 // Heap region set verification |
abdfc822206f
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2432
diff
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|
6652 |
2152 | 6653 class VerifyRegionListsClosure : public HeapRegionClosure { |
6654 private: | |
17736
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8034079: G1: Refactor the HeapRegionSet hierarchy
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|
6655 HeapRegionSet* _old_set; |
58fc1b1523dc
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|
6656 HeapRegionSet* _humongous_set; |
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|
6657 FreeRegionList* _free_list; |
2152 | 6658 |
6659 public: | |
17736
58fc1b1523dc
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|
6660 HeapRegionSetCount _old_count; |
58fc1b1523dc
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|
6661 HeapRegionSetCount _humongous_count; |
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|
6662 HeapRegionSetCount _free_count; |
58fc1b1523dc
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|
6663 |
58fc1b1523dc
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|
6664 VerifyRegionListsClosure(HeapRegionSet* old_set, |
58fc1b1523dc
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|
6665 HeapRegionSet* humongous_set, |
2152 | 6666 FreeRegionList* free_list) : |
17736
58fc1b1523dc
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brutisso
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|
6667 _old_set(old_set), _humongous_set(humongous_set), _free_list(free_list), |
58fc1b1523dc
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|
6668 _old_count(), _humongous_count(), _free_count(){ } |
2152 | 6669 |
6670 bool doHeapRegion(HeapRegion* hr) { | |
6671 if (hr->continuesHumongous()) { | |
6672 return false; | |
6673 } | |
6674 | |
6675 if (hr->is_young()) { | |
6676 // TODO | |
6677 } else if (hr->startsHumongous()) { | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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diff
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|
6678 assert(hr->containing_set() == _humongous_set, err_msg("Heap region %u is starts humongous but not in humongous set.", hr->region_num())); |
58fc1b1523dc
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brutisso
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|
6679 _humongous_count.increment(1u, hr->capacity()); |
2152 | 6680 } else if (hr->is_empty()) { |
17736
58fc1b1523dc
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brutisso
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|
6681 assert(hr->containing_set() == _free_list, err_msg("Heap region %u is empty but not on the free list.", hr->region_num())); |
58fc1b1523dc
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brutisso
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|
6682 _free_count.increment(1u, hr->capacity()); |
4072 | 6683 } else { |
17736
58fc1b1523dc
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brutisso
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diff
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|
6684 assert(hr->containing_set() == _old_set, err_msg("Heap region %u is old but not in the old set.", hr->region_num())); |
58fc1b1523dc
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brutisso
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|
6685 _old_count.increment(1u, hr->capacity()); |
2152 | 6686 } |
6687 return false; | |
6688 } | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
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diff
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|
6689 |
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diff
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|
6690 void verify_counts(HeapRegionSet* old_set, HeapRegionSet* humongous_set, FreeRegionList* free_list) { |
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|
6691 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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diff
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|
6692 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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|
6693 old_set->total_capacity_bytes(), _old_count.capacity())); |
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brutisso
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diff
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|
6694 |
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changeset
|
6695 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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|
6696 guarantee(humongous_set->total_capacity_bytes() == _humongous_count.capacity(), err_msg("Hum set capacity mismatch. Expected " SIZE_FORMAT ", actual " SIZE_FORMAT, |
58fc1b1523dc
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brutisso
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|
6697 humongous_set->total_capacity_bytes(), _humongous_count.capacity())); |
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|
6698 |
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|
6699 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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|
6700 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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|
6701 free_list->total_capacity_bytes(), _free_count.capacity())); |
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|
6702 } |
2152 | 6703 }; |
6704 | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
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6008
diff
changeset
|
6705 HeapRegion* G1CollectedHeap::new_heap_region(uint hrs_index, |
3766 | 6706 HeapWord* bottom) { |
6707 HeapWord* end = bottom + HeapRegion::GrainWords; | |
6708 MemRegion mr(bottom, end); | |
6709 assert(_g1_reserved.contains(mr), "invariant"); | |
6710 // This might return NULL if the allocation fails | |
6754
8fbf05030e24
7016955: G1: remove the is_zeroed parameter from the HeapRegion constructor
johnc
parents:
6752
diff
changeset
|
6711 return new HeapRegion(hrs_index, _bot_shared, mr); |
3766 | 6712 } |
6713 | |
2152 | 6714 void G1CollectedHeap::verify_region_sets() { |
6715 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); | |
6716 | |
6717 // First, check the explicit lists. | |
17736
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brutisso
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|
6718 _free_list.verify_list(); |
2152 | 6719 { |
6720 // Given that a concurrent operation might be adding regions to | |
6721 // the secondary free list we have to take the lock before | |
6722 // verifying it. | |
6723 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
17736
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|
6724 _secondary_free_list.verify_list(); |
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|
6725 } |
2152 | 6726 |
6727 // If a concurrent region freeing operation is in progress it will | |
6728 // be difficult to correctly attributed any free regions we come | |
6729 // across to the correct free list given that they might belong to | |
6730 // one of several (free_list, secondary_free_list, any local lists, | |
6731 // etc.). So, if that's the case we will skip the rest of the | |
6732 // verification operation. Alternatively, waiting for the concurrent | |
6733 // operation to complete will have a non-trivial effect on the GC's | |
6734 // operation (no concurrent operation will last longer than the | |
6735 // interval between two calls to verification) and it might hide | |
6736 // any issues that we would like to catch during testing. | |
6737 if (free_regions_coming()) { | |
6738 return; | |
6739 } | |
6740 | |
2361 | 6741 // Make sure we append the secondary_free_list on the free_list so |
6742 // that all free regions we will come across can be safely | |
6743 // attributed to the free_list. | |
6744 append_secondary_free_list_if_not_empty_with_lock(); | |
2152 | 6745 |
6746 // Finally, make sure that the region accounting in the lists is | |
6747 // consistent with what we see in the heap. | |
6748 | |
4072 | 6749 VerifyRegionListsClosure cl(&_old_set, &_humongous_set, &_free_list); |
2152 | 6750 heap_region_iterate(&cl); |
17736
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6751 cl.verify_counts(&_old_set, &_humongous_set, &_free_list); |
342 | 6752 } |
12080 | 6753 |
6754 // Optimized nmethod scanning | |
6755 | |
6756 class RegisterNMethodOopClosure: public OopClosure { | |
6757 G1CollectedHeap* _g1h; | |
6758 nmethod* _nm; | |
6759 | |
6760 template <class T> void do_oop_work(T* p) { | |
6761 T heap_oop = oopDesc::load_heap_oop(p); | |
6762 if (!oopDesc::is_null(heap_oop)) { | |
6763 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
6764 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
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6765 assert(!hr->continuesHumongous(), |
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6766 err_msg("trying to add code root "PTR_FORMAT" in continuation of humongous region "HR_FORMAT |
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6767 " starting at "HR_FORMAT, |
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6768 _nm, HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()))); |
12080 | 6769 |
6770 // HeapRegion::add_strong_code_root() avoids adding duplicate | |
6771 // entries but having duplicates is OK since we "mark" nmethods | |
6772 // as visited when we scan the strong code root lists during the GC. | |
6773 hr->add_strong_code_root(_nm); | |
13062
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6774 assert(hr->rem_set()->strong_code_roots_list_contains(_nm), |
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6775 err_msg("failed to add code root "PTR_FORMAT" to remembered set of region "HR_FORMAT, |
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6776 _nm, HR_FORMAT_PARAMS(hr))); |
12080 | 6777 } |
6778 } | |
6779 | |
6780 public: | |
6781 RegisterNMethodOopClosure(G1CollectedHeap* g1h, nmethod* nm) : | |
6782 _g1h(g1h), _nm(nm) {} | |
6783 | |
6784 void do_oop(oop* p) { do_oop_work(p); } | |
6785 void do_oop(narrowOop* p) { do_oop_work(p); } | |
6786 }; | |
6787 | |
6788 class UnregisterNMethodOopClosure: public OopClosure { | |
6789 G1CollectedHeap* _g1h; | |
6790 nmethod* _nm; | |
6791 | |
6792 template <class T> void do_oop_work(T* p) { | |
6793 T heap_oop = oopDesc::load_heap_oop(p); | |
6794 if (!oopDesc::is_null(heap_oop)) { | |
6795 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
6796 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
13062
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6797 assert(!hr->continuesHumongous(), |
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6798 err_msg("trying to remove code root "PTR_FORMAT" in continuation of humongous region "HR_FORMAT |
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6799 " starting at "HR_FORMAT, |
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6800 _nm, HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()))); |
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6801 |
12080 | 6802 hr->remove_strong_code_root(_nm); |
13062
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6803 assert(!hr->rem_set()->strong_code_roots_list_contains(_nm), |
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6804 err_msg("failed to remove code root "PTR_FORMAT" of region "HR_FORMAT, |
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6805 _nm, HR_FORMAT_PARAMS(hr))); |
12080 | 6806 } |
6807 } | |
6808 | |
6809 public: | |
6810 UnregisterNMethodOopClosure(G1CollectedHeap* g1h, nmethod* nm) : | |
6811 _g1h(g1h), _nm(nm) {} | |
6812 | |
6813 void do_oop(oop* p) { do_oop_work(p); } | |
6814 void do_oop(narrowOop* p) { do_oop_work(p); } | |
6815 }; | |
6816 | |
6817 void G1CollectedHeap::register_nmethod(nmethod* nm) { | |
6818 CollectedHeap::register_nmethod(nm); | |
6819 | |
6820 guarantee(nm != NULL, "sanity"); | |
6821 RegisterNMethodOopClosure reg_cl(this, nm); | |
6822 nm->oops_do(®_cl); | |
6823 } | |
6824 | |
6825 void G1CollectedHeap::unregister_nmethod(nmethod* nm) { | |
6826 CollectedHeap::unregister_nmethod(nm); | |
6827 | |
6828 guarantee(nm != NULL, "sanity"); | |
6829 UnregisterNMethodOopClosure reg_cl(this, nm); | |
6830 nm->oops_do(®_cl, true); | |
6831 } | |
6832 | |
6833 class MigrateCodeRootsHeapRegionClosure: public HeapRegionClosure { | |
6834 public: | |
6835 bool doHeapRegion(HeapRegion *hr) { | |
13062
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6836 assert(!hr->isHumongous(), |
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6837 err_msg("humongous region "HR_FORMAT" should not have been added to collection set", |
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6838 HR_FORMAT_PARAMS(hr))); |
12080 | 6839 hr->migrate_strong_code_roots(); |
6840 return false; | |
6841 } | |
6842 }; | |
6843 | |
6844 void G1CollectedHeap::migrate_strong_code_roots() { | |
6845 MigrateCodeRootsHeapRegionClosure cl; | |
6846 double migrate_start = os::elapsedTime(); | |
6847 collection_set_iterate(&cl); | |
6848 double migration_time_ms = (os::elapsedTime() - migrate_start) * 1000.0; | |
6849 g1_policy()->phase_times()->record_strong_code_root_migration_time(migration_time_ms); | |
6850 } | |
6851 | |
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6852 void G1CollectedHeap::purge_code_root_memory() { |
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6853 double purge_start = os::elapsedTime(); |
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|
6854 G1CodeRootSet::purge_chunks(G1CodeRootsChunkCacheKeepPercent); |
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6855 double purge_time_ms = (os::elapsedTime() - purge_start) * 1000.0; |
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6856 g1_policy()->phase_times()->record_strong_code_root_purge_time(purge_time_ms); |
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6857 } |
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|
6858 |
12080 | 6859 // Mark all the code roots that point into regions *not* in the |
6860 // collection set. | |
6861 // | |
6862 // Note we do not want to use a "marking" CodeBlobToOopClosure while | |
6863 // walking the the code roots lists of regions not in the collection | |
6864 // set. Suppose we have an nmethod (M) that points to objects in two | |
6865 // separate regions - one in the collection set (R1) and one not (R2). | |
6866 // Using a "marking" CodeBlobToOopClosure here would result in "marking" | |
6867 // nmethod M when walking the code roots for R1. When we come to scan | |
6868 // the code roots for R2, we would see that M is already marked and it | |
6869 // would be skipped and the objects in R2 that are referenced from M | |
6870 // would not be evacuated. | |
6871 | |
6872 class MarkStrongCodeRootCodeBlobClosure: public CodeBlobClosure { | |
6873 | |
6874 class MarkStrongCodeRootOopClosure: public OopClosure { | |
6875 ConcurrentMark* _cm; | |
6876 HeapRegion* _hr; | |
6877 uint _worker_id; | |
6878 | |
6879 template <class T> void do_oop_work(T* p) { | |
6880 T heap_oop = oopDesc::load_heap_oop(p); | |
6881 if (!oopDesc::is_null(heap_oop)) { | |
6882 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
6883 // Only mark objects in the region (which is assumed | |
6884 // to be not in the collection set). | |
6885 if (_hr->is_in(obj)) { | |
6886 _cm->grayRoot(obj, (size_t) obj->size(), _worker_id); | |
6887 } | |
6888 } | |
6889 } | |
6890 | |
6891 public: | |
6892 MarkStrongCodeRootOopClosure(ConcurrentMark* cm, HeapRegion* hr, uint worker_id) : | |
6893 _cm(cm), _hr(hr), _worker_id(worker_id) { | |
6894 assert(!_hr->in_collection_set(), "sanity"); | |
6895 } | |
6896 | |
6897 void do_oop(narrowOop* p) { do_oop_work(p); } | |
6898 void do_oop(oop* p) { do_oop_work(p); } | |
6899 }; | |
6900 | |
6901 MarkStrongCodeRootOopClosure _oop_cl; | |
6902 | |
6903 public: | |
6904 MarkStrongCodeRootCodeBlobClosure(ConcurrentMark* cm, HeapRegion* hr, uint worker_id): | |
6905 _oop_cl(cm, hr, worker_id) {} | |
6906 | |
6907 void do_code_blob(CodeBlob* cb) { | |
6908 nmethod* nm = (cb == NULL) ? NULL : cb->as_nmethod_or_null(); | |
6909 if (nm != NULL) { | |
6910 nm->oops_do(&_oop_cl); | |
6911 } | |
6912 } | |
6913 }; | |
6914 | |
6915 class MarkStrongCodeRootsHRClosure: public HeapRegionClosure { | |
6916 G1CollectedHeap* _g1h; | |
6917 uint _worker_id; | |
6918 | |
6919 public: | |
6920 MarkStrongCodeRootsHRClosure(G1CollectedHeap* g1h, uint worker_id) : | |
6921 _g1h(g1h), _worker_id(worker_id) {} | |
6922 | |
6923 bool doHeapRegion(HeapRegion *hr) { | |
6924 HeapRegionRemSet* hrrs = hr->rem_set(); | |
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8027756: assert(!hr->isHumongous()) failed: code root in humongous region?
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6925 if (hr->continuesHumongous()) { |
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6926 // Code roots should never be attached to a continuation of a humongous region |
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|
6927 assert(hrrs->strong_code_roots_list_length() == 0, |
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|
6928 err_msg("code roots should never be attached to continuations of humongous region "HR_FORMAT |
17753
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|
6929 " starting at "HR_FORMAT", but has "SIZE_FORMAT, |
13062
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|
6930 HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()), |
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|
6931 hrrs->strong_code_roots_list_length())); |
12080 | 6932 return false; |
6933 } | |
6934 | |
6935 if (hr->in_collection_set()) { | |
6936 // Don't mark code roots into regions in the collection set here. | |
6937 // They will be marked when we scan them. | |
6938 return false; | |
6939 } | |
6940 | |
6941 MarkStrongCodeRootCodeBlobClosure cb_cl(_g1h->concurrent_mark(), hr, _worker_id); | |
6942 hr->strong_code_roots_do(&cb_cl); | |
6943 return false; | |
6944 } | |
6945 }; | |
6946 | |
6947 void G1CollectedHeap::mark_strong_code_roots(uint worker_id) { | |
6948 MarkStrongCodeRootsHRClosure cl(this, worker_id); | |
12082
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brutisso
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|
6949 if (G1CollectedHeap::use_parallel_gc_threads()) { |
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brutisso
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|
6950 heap_region_par_iterate_chunked(&cl, |
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brutisso
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|
6951 worker_id, |
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brutisso
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diff
changeset
|
6952 workers()->active_workers(), |
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brutisso
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|
6953 HeapRegion::ParMarkRootClaimValue); |
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|
6954 } else { |
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|
6955 heap_region_iterate(&cl); |
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|
6956 } |
12080 | 6957 } |
6958 | |
6959 class RebuildStrongCodeRootClosure: public CodeBlobClosure { | |
6960 G1CollectedHeap* _g1h; | |
6961 | |
6962 public: | |
6963 RebuildStrongCodeRootClosure(G1CollectedHeap* g1h) : | |
6964 _g1h(g1h) {} | |
6965 | |
6966 void do_code_blob(CodeBlob* cb) { | |
6967 nmethod* nm = (cb != NULL) ? cb->as_nmethod_or_null() : NULL; | |
6968 if (nm == NULL) { | |
6969 return; | |
6970 } | |
6971 | |
6972 if (ScavengeRootsInCode && nm->detect_scavenge_root_oops()) { | |
6973 _g1h->register_nmethod(nm); | |
6974 } | |
6975 } | |
6976 }; | |
6977 | |
6978 void G1CollectedHeap::rebuild_strong_code_roots() { | |
6979 RebuildStrongCodeRootClosure blob_cl(this); | |
6980 CodeCache::blobs_do(&blob_cl); | |
6981 } |