Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp @ 20198:c49dcaf78a65
8042737: Introduce umbrella header prefetch.inline.hpp
Reviewed-by: twisti, stefank
author | goetz |
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date | Thu, 08 May 2014 15:37:17 +0200 |
parents | ce8f6bb717c9 |
children | d7e2d5f2846b |
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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" | |
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63 #include "runtime/prefetch.inline.hpp" |
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64 #include "runtime/orderAccess.inline.hpp" |
1972 | 65 #include "runtime/vmThread.hpp" |
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66 #include "utilities/ticks.hpp" |
342 | 67 |
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68 size_t G1CollectedHeap::_humongous_object_threshold_in_words = 0; |
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69 |
342 | 70 // turn it on so that the contents of the young list (scan-only / |
71 // to-be-collected) are printed at "strategic" points before / during | |
72 // / after the collection --- this is useful for debugging | |
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73 #define YOUNG_LIST_VERBOSE 0 |
342 | 74 // CURRENT STATUS |
75 // This file is under construction. Search for "FIXME". | |
76 | |
77 // INVARIANTS/NOTES | |
78 // | |
79 // All allocation activity covered by the G1CollectedHeap interface is | |
1973 | 80 // serialized by acquiring the HeapLock. This happens in mem_allocate |
81 // and allocate_new_tlab, which are the "entry" points to the | |
82 // allocation code from the rest of the JVM. (Note that this does not | |
83 // apply to TLAB allocation, which is not part of this interface: it | |
84 // is done by clients of this interface.) | |
342 | 85 |
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86 // Notes on implementation of parallelism in different tasks. |
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87 // |
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88 // G1ParVerifyTask uses heap_region_par_iterate_chunked() for parallelism. |
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89 // The number of GC workers is passed to heap_region_par_iterate_chunked(). |
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90 // It does use run_task() which sets _n_workers in the task. |
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91 // G1ParTask executes g1_process_strong_roots() -> |
10405 | 92 // SharedHeap::process_strong_roots() which calls eventually to |
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93 // CardTableModRefBS::par_non_clean_card_iterate_work() which uses |
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94 // SequentialSubTasksDone. SharedHeap::process_strong_roots() also |
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95 // directly uses SubTasksDone (_process_strong_tasks field in SharedHeap). |
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96 // |
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97 |
342 | 98 // Local to this file. |
99 | |
100 class RefineCardTableEntryClosure: public CardTableEntryClosure { | |
101 G1RemSet* _g1rs; | |
102 ConcurrentG1Refine* _cg1r; | |
103 bool _concurrent; | |
104 public: | |
20192 | 105 RefineCardTableEntryClosure(G1RemSet* g1rs, |
342 | 106 ConcurrentG1Refine* cg1r) : |
20192 | 107 _g1rs(g1rs), _cg1r(cg1r), _concurrent(true) |
342 | 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 | |
20192 | 116 if (_concurrent && SuspendibleThreadSet::should_yield()) { |
342 | 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 |
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435 #ifdef ASSERT |
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436 // A region is added to the collection set as it is retired |
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437 // so an address p can point to a region which will be in the |
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438 // collection set but has not yet been retired. This method |
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439 // therefore is only accurate during a GC pause after all |
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440 // regions have been retired. It is used for debugging |
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441 // to check if an nmethod has references to objects that can |
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442 // be move during a partial collection. Though it can be |
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443 // inaccurate, it is sufficient for G1 because the conservative |
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444 // implementation of is_scavengable() for G1 will indicate that |
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445 // all nmethods must be scanned during a partial collection. |
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446 bool G1CollectedHeap::is_in_partial_collection(const void* p) { |
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447 HeapRegion* hr = heap_region_containing(p); |
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448 return hr != NULL && hr->in_collection_set(); |
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449 } |
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450 #endif |
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451 |
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452 // Returns true if the reference points to an object that |
10405 | 453 // can move in an incremental collection. |
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454 bool G1CollectedHeap::is_scavengable(const void* p) { |
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455 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
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456 G1CollectorPolicy* g1p = g1h->g1_policy(); |
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457 HeapRegion* hr = heap_region_containing(p); |
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458 if (hr == NULL) { |
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459 // null |
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460 assert(p == NULL, err_msg("Not NULL " PTR_FORMAT ,p)); |
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461 return false; |
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462 } else { |
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463 return !hr->isHumongous(); |
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464 } |
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465 } |
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466 |
342 | 467 void G1CollectedHeap::check_ct_logs_at_safepoint() { |
468 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
12343 | 469 CardTableModRefBS* ct_bs = g1_barrier_set(); |
342 | 470 |
471 // Count the dirty cards at the start. | |
472 CountNonCleanMemRegionClosure count1(this); | |
473 ct_bs->mod_card_iterate(&count1); | |
474 int orig_count = count1.n(); | |
475 | |
476 // First clear the logged cards. | |
477 ClearLoggedCardTableEntryClosure clear; | |
478 dcqs.set_closure(&clear); | |
479 dcqs.apply_closure_to_all_completed_buffers(); | |
480 dcqs.iterate_closure_all_threads(false); | |
481 clear.print_histo(); | |
482 | |
483 // Now ensure that there's no dirty cards. | |
484 CountNonCleanMemRegionClosure count2(this); | |
485 ct_bs->mod_card_iterate(&count2); | |
486 if (count2.n() != 0) { | |
487 gclog_or_tty->print_cr("Card table has %d entries; %d originally", | |
488 count2.n(), orig_count); | |
489 } | |
490 guarantee(count2.n() == 0, "Card table should be clean."); | |
491 | |
492 RedirtyLoggedCardTableEntryClosure redirty; | |
493 JavaThread::dirty_card_queue_set().set_closure(&redirty); | |
494 dcqs.apply_closure_to_all_completed_buffers(); | |
495 dcqs.iterate_closure_all_threads(false); | |
496 gclog_or_tty->print_cr("Log entries = %d, dirty cards = %d.", | |
497 clear.calls(), orig_count); | |
498 guarantee(redirty.calls() == clear.calls(), | |
499 "Or else mechanism is broken."); | |
500 | |
501 CountNonCleanMemRegionClosure count3(this); | |
502 ct_bs->mod_card_iterate(&count3); | |
503 if (count3.n() != orig_count) { | |
504 gclog_or_tty->print_cr("Should have restored them all: orig = %d, final = %d.", | |
505 orig_count, count3.n()); | |
506 guarantee(count3.n() >= orig_count, "Should have restored them all."); | |
507 } | |
508 | |
509 JavaThread::dirty_card_queue_set().set_closure(_refine_cte_cl); | |
510 } | |
511 | |
512 // Private class members. | |
513 | |
514 G1CollectedHeap* G1CollectedHeap::_g1h; | |
515 | |
516 // Private methods. | |
517 | |
2152 | 518 HeapRegion* |
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519 G1CollectedHeap::new_region_try_secondary_free_list(bool is_old) { |
2152 | 520 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
521 while (!_secondary_free_list.is_empty() || free_regions_coming()) { | |
522 if (!_secondary_free_list.is_empty()) { | |
523 if (G1ConcRegionFreeingVerbose) { | |
524 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
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525 "secondary_free_list has %u entries", |
2152 | 526 _secondary_free_list.length()); |
527 } | |
528 // It looks as if there are free regions available on the | |
529 // secondary_free_list. Let's move them to the free_list and try | |
530 // again to allocate from it. | |
531 append_secondary_free_list(); | |
532 | |
533 assert(!_free_list.is_empty(), "if the secondary_free_list was not " | |
534 "empty we should have moved at least one entry to the free_list"); | |
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535 HeapRegion* res = _free_list.remove_region(is_old); |
2152 | 536 if (G1ConcRegionFreeingVerbose) { |
537 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
538 "allocated "HR_FORMAT" from secondary_free_list", | |
539 HR_FORMAT_PARAMS(res)); | |
540 } | |
541 return res; | |
542 } | |
543 | |
10405 | 544 // Wait here until we get notified either when (a) there are no |
2152 | 545 // more free regions coming or (b) some regions have been moved on |
546 // the secondary_free_list. | |
547 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
548 } | |
549 | |
550 if (G1ConcRegionFreeingVerbose) { | |
551 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
552 "could not allocate from secondary_free_list"); | |
553 } | |
554 return NULL; | |
555 } | |
556 | |
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557 HeapRegion* G1CollectedHeap::new_region(size_t word_size, bool is_old, bool do_expand) { |
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558 assert(!isHumongous(word_size) || word_size <= HeapRegion::GrainWords, |
2152 | 559 "the only time we use this to allocate a humongous region is " |
560 "when we are allocating a single humongous region"); | |
561 | |
562 HeapRegion* res; | |
563 if (G1StressConcRegionFreeing) { | |
564 if (!_secondary_free_list.is_empty()) { | |
565 if (G1ConcRegionFreeingVerbose) { | |
566 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
567 "forced to look at the secondary_free_list"); | |
568 } | |
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569 res = new_region_try_secondary_free_list(is_old); |
2152 | 570 if (res != NULL) { |
571 return res; | |
572 } | |
573 } | |
574 } | |
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575 |
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576 res = _free_list.remove_region(is_old); |
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577 |
2152 | 578 if (res == NULL) { |
579 if (G1ConcRegionFreeingVerbose) { | |
580 gclog_or_tty->print_cr("G1ConcRegionFreeing [region alloc] : " | |
581 "res == NULL, trying the secondary_free_list"); | |
582 } | |
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583 res = new_region_try_secondary_free_list(is_old); |
2152 | 584 } |
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585 if (res == NULL && do_expand && _expand_heap_after_alloc_failure) { |
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586 // Currently, only attempts to allocate GC alloc regions set |
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587 // do_expand to true. So, we should only reach here during a |
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588 // safepoint. If this assumption changes we might have to |
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589 // reconsider the use of _expand_heap_after_alloc_failure. |
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590 assert(SafepointSynchronize::is_at_safepoint(), "invariant"); |
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591 |
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592 ergo_verbose1(ErgoHeapSizing, |
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593 "attempt heap expansion", |
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594 ergo_format_reason("region allocation request failed") |
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595 ergo_format_byte("allocation request"), |
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596 word_size * HeapWordSize); |
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597 if (expand(word_size * HeapWordSize)) { |
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598 // Given that expand() succeeded in expanding the heap, and we |
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599 // always expand the heap by an amount aligned to the heap |
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600 // region size, the free list should in theory not be empty. |
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601 // In either case remove_region() will check for NULL. |
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602 res = _free_list.remove_region(is_old); |
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603 } else { |
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604 _expand_heap_after_alloc_failure = false; |
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605 } |
342 | 606 } |
607 return res; | |
608 } | |
609 | |
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610 uint G1CollectedHeap::humongous_obj_allocate_find_first(uint num_regions, |
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611 size_t word_size) { |
2361 | 612 assert(isHumongous(word_size), "word_size should be humongous"); |
613 assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); | |
614 | |
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615 uint first = G1_NULL_HRS_INDEX; |
2152 | 616 if (num_regions == 1) { |
617 // Only one region to allocate, no need to go through the slower | |
10405 | 618 // path. The caller will attempt the expansion if this fails, so |
2152 | 619 // let's not try to expand here too. |
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620 HeapRegion* hr = new_region(word_size, true /* is_old */, false /* do_expand */); |
2152 | 621 if (hr != NULL) { |
622 first = hr->hrs_index(); | |
623 } else { | |
3766 | 624 first = G1_NULL_HRS_INDEX; |
2152 | 625 } |
626 } else { | |
627 // We can't allocate humongous regions while cleanupComplete() is | |
628 // running, since some of the regions we find to be empty might not | |
629 // yet be added to the free list and it is not straightforward to | |
630 // know which list they are on so that we can remove them. Note | |
631 // that we only need to do this if we need to allocate more than | |
632 // one region to satisfy the current humongous allocation | |
633 // request. If we are only allocating one region we use the common | |
634 // region allocation code (see above). | |
635 wait_while_free_regions_coming(); | |
2361 | 636 append_secondary_free_list_if_not_empty_with_lock(); |
2152 | 637 |
638 if (free_regions() >= num_regions) { | |
3766 | 639 first = _hrs.find_contiguous(num_regions); |
640 if (first != G1_NULL_HRS_INDEX) { | |
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641 for (uint i = first; i < first + num_regions; ++i) { |
3766 | 642 HeapRegion* hr = region_at(i); |
2152 | 643 assert(hr->is_empty(), "sanity"); |
2361 | 644 assert(is_on_master_free_list(hr), "sanity"); |
2152 | 645 hr->set_pending_removal(true); |
646 } | |
647 _free_list.remove_all_pending(num_regions); | |
648 } | |
649 } | |
650 } | |
651 return first; | |
652 } | |
653 | |
2361 | 654 HeapWord* |
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655 G1CollectedHeap::humongous_obj_allocate_initialize_regions(uint first, |
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656 uint num_regions, |
2361 | 657 size_t word_size) { |
3766 | 658 assert(first != G1_NULL_HRS_INDEX, "pre-condition"); |
2361 | 659 assert(isHumongous(word_size), "word_size should be humongous"); |
660 assert(num_regions * HeapRegion::GrainWords >= word_size, "pre-condition"); | |
661 | |
662 // Index of last region in the series + 1. | |
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663 uint last = first + num_regions; |
2361 | 664 |
665 // We need to initialize the region(s) we just discovered. This is | |
666 // a bit tricky given that it can happen concurrently with | |
667 // refinement threads refining cards on these regions and | |
668 // potentially wanting to refine the BOT as they are scanning | |
669 // those cards (this can happen shortly after a cleanup; see CR | |
670 // 6991377). So we have to set up the region(s) carefully and in | |
671 // a specific order. | |
672 | |
673 // The word size sum of all the regions we will allocate. | |
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674 size_t word_size_sum = (size_t) num_regions * HeapRegion::GrainWords; |
2361 | 675 assert(word_size <= word_size_sum, "sanity"); |
676 | |
677 // This will be the "starts humongous" region. | |
3766 | 678 HeapRegion* first_hr = region_at(first); |
2361 | 679 // The header of the new object will be placed at the bottom of |
680 // the first region. | |
681 HeapWord* new_obj = first_hr->bottom(); | |
682 // This will be the new end of the first region in the series that | |
10405 | 683 // should also match the end of the last region in the series. |
2361 | 684 HeapWord* new_end = new_obj + word_size_sum; |
685 // This will be the new top of the first region that will reflect | |
686 // this allocation. | |
687 HeapWord* new_top = new_obj + word_size; | |
688 | |
689 // First, we need to zero the header of the space that we will be | |
690 // allocating. When we update top further down, some refinement | |
691 // threads might try to scan the region. By zeroing the header we | |
692 // ensure that any thread that will try to scan the region will | |
693 // come across the zero klass word and bail out. | |
694 // | |
695 // NOTE: It would not have been correct to have used | |
696 // CollectedHeap::fill_with_object() and make the space look like | |
697 // an int array. The thread that is doing the allocation will | |
698 // later update the object header to a potentially different array | |
699 // type and, for a very short period of time, the klass and length | |
700 // fields will be inconsistent. This could cause a refinement | |
701 // thread to calculate the object size incorrectly. | |
702 Copy::fill_to_words(new_obj, oopDesc::header_size(), 0); | |
703 | |
704 // We will set up the first region as "starts humongous". This | |
705 // will also update the BOT covering all the regions to reflect | |
706 // that there is a single object that starts at the bottom of the | |
707 // first region. | |
708 first_hr->set_startsHumongous(new_top, new_end); | |
709 | |
710 // Then, if there are any, we will set up the "continues | |
711 // humongous" regions. | |
712 HeapRegion* hr = NULL; | |
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713 for (uint i = first + 1; i < last; ++i) { |
3766 | 714 hr = region_at(i); |
2361 | 715 hr->set_continuesHumongous(first_hr); |
716 } | |
717 // If we have "continues humongous" regions (hr != NULL), then the | |
718 // end of the last one should match new_end. | |
719 assert(hr == NULL || hr->end() == new_end, "sanity"); | |
720 | |
721 // Up to this point no concurrent thread would have been able to | |
722 // do any scanning on any region in this series. All the top | |
723 // fields still point to bottom, so the intersection between | |
724 // [bottom,top] and [card_start,card_end] will be empty. Before we | |
725 // update the top fields, we'll do a storestore to make sure that | |
726 // no thread sees the update to top before the zeroing of the | |
727 // object header and the BOT initialization. | |
728 OrderAccess::storestore(); | |
729 | |
730 // Now that the BOT and the object header have been initialized, | |
731 // we can update top of the "starts humongous" region. | |
732 assert(first_hr->bottom() < new_top && new_top <= first_hr->end(), | |
733 "new_top should be in this region"); | |
734 first_hr->set_top(new_top); | |
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735 if (_hr_printer.is_active()) { |
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736 HeapWord* bottom = first_hr->bottom(); |
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737 HeapWord* end = first_hr->orig_end(); |
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738 if ((first + 1) == last) { |
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739 // the series has a single humongous region |
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740 _hr_printer.alloc(G1HRPrinter::SingleHumongous, first_hr, new_top); |
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741 } else { |
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742 // the series has more than one humongous regions |
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743 _hr_printer.alloc(G1HRPrinter::StartsHumongous, first_hr, end); |
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744 } |
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745 } |
2361 | 746 |
747 // Now, we will update the top fields of the "continues humongous" | |
748 // regions. The reason we need to do this is that, otherwise, | |
749 // these regions would look empty and this will confuse parts of | |
750 // G1. For example, the code that looks for a consecutive number | |
751 // of empty regions will consider them empty and try to | |
752 // re-allocate them. We can extend is_empty() to also include | |
753 // !continuesHumongous(), but it is easier to just update the top | |
754 // fields here. The way we set top for all regions (i.e., top == | |
755 // end for all regions but the last one, top == new_top for the | |
756 // last one) is actually used when we will free up the humongous | |
757 // region in free_humongous_region(). | |
758 hr = NULL; | |
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759 for (uint i = first + 1; i < last; ++i) { |
3766 | 760 hr = region_at(i); |
2361 | 761 if ((i + 1) == last) { |
762 // last continues humongous region | |
763 assert(hr->bottom() < new_top && new_top <= hr->end(), | |
764 "new_top should fall on this region"); | |
765 hr->set_top(new_top); | |
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766 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, new_top); |
2361 | 767 } else { |
768 // not last one | |
769 assert(new_top > hr->end(), "new_top should be above this region"); | |
770 hr->set_top(hr->end()); | |
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771 _hr_printer.alloc(G1HRPrinter::ContinuesHumongous, hr, hr->end()); |
2361 | 772 } |
773 } | |
774 // If we have continues humongous regions (hr != NULL), then the | |
775 // end of the last one should match new_end and its top should | |
776 // match new_top. | |
777 assert(hr == NULL || | |
778 (hr->end() == new_end && hr->top() == new_top), "sanity"); | |
779 | |
780 assert(first_hr->used() == word_size * HeapWordSize, "invariant"); | |
781 _summary_bytes_used += first_hr->used(); | |
782 _humongous_set.add(first_hr); | |
783 | |
784 return new_obj; | |
785 } | |
786 | |
342 | 787 // If could fit into free regions w/o expansion, try. |
788 // Otherwise, if can expand, do so. | |
789 // Otherwise, if using ex regions might help, try with ex given back. | |
1973 | 790 HeapWord* G1CollectedHeap::humongous_obj_allocate(size_t word_size) { |
2152 | 791 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
792 | |
793 verify_region_sets_optional(); | |
342 | 794 |
6010
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795 size_t word_size_rounded = round_to(word_size, HeapRegion::GrainWords); |
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796 uint num_regions = (uint) (word_size_rounded / HeapRegion::GrainWords); |
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797 uint x_num = expansion_regions(); |
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798 uint fs = _hrs.free_suffix(); |
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799 uint first = humongous_obj_allocate_find_first(num_regions, word_size); |
3766 | 800 if (first == G1_NULL_HRS_INDEX) { |
2152 | 801 // The only thing we can do now is attempt expansion. |
6010
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802 if (fs + x_num >= num_regions) { |
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803 // If the number of regions we're trying to allocate for this |
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804 // object is at most the number of regions in the free suffix, |
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805 // then the call to humongous_obj_allocate_find_first() above |
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806 // should have succeeded and we wouldn't be here. |
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807 // |
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808 // We should only be trying to expand when the free suffix is |
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809 // not sufficient for the object _and_ we have some expansion |
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810 // room available. |
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811 assert(num_regions > fs, "earlier allocation should have succeeded"); |
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812 |
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813 ergo_verbose1(ErgoHeapSizing, |
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814 "attempt heap expansion", |
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815 ergo_format_reason("humongous allocation request failed") |
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816 ergo_format_byte("allocation request"), |
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817 word_size * HeapWordSize); |
2188
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818 if (expand((num_regions - fs) * HeapRegion::GrainBytes)) { |
3766 | 819 // Even though the heap was expanded, it might not have |
820 // reached the desired size. So, we cannot assume that the | |
821 // allocation will succeed. | |
2188
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822 first = humongous_obj_allocate_find_first(num_regions, word_size); |
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823 } |
2152 | 824 } |
825 } | |
826 | |
2361 | 827 HeapWord* result = NULL; |
3766 | 828 if (first != G1_NULL_HRS_INDEX) { |
2361 | 829 result = |
830 humongous_obj_allocate_initialize_regions(first, num_regions, word_size); | |
831 assert(result != NULL, "it should always return a valid result"); | |
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832 |
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833 // A successful humongous object allocation changes the used space |
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834 // information of the old generation so we need to recalculate the |
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835 // sizes and update the jstat counters here. |
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836 g1mm()->update_sizes(); |
2152 | 837 } |
838 | |
839 verify_region_sets_optional(); | |
2361 | 840 |
841 return result; | |
342 | 842 } |
843 | |
1973 | 844 HeapWord* G1CollectedHeap::allocate_new_tlab(size_t word_size) { |
845 assert_heap_not_locked_and_not_at_safepoint(); | |
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846 assert(!isHumongous(word_size), "we do not allow humongous TLABs"); |
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847 |
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848 unsigned int dummy_gc_count_before; |
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849 int dummy_gclocker_retry_count = 0; |
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850 return attempt_allocation(word_size, &dummy_gc_count_before, &dummy_gclocker_retry_count); |
342 | 851 } |
852 | |
853 HeapWord* | |
854 G1CollectedHeap::mem_allocate(size_t word_size, | |
1973 | 855 bool* gc_overhead_limit_was_exceeded) { |
856 assert_heap_not_locked_and_not_at_safepoint(); | |
342 | 857 |
10405 | 858 // Loop until the allocation is satisfied, or unsatisfied after GC. |
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859 for (int try_count = 1, gclocker_retry_count = 0; /* we'll return */; try_count += 1) { |
1973 | 860 unsigned int gc_count_before; |
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861 |
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862 HeapWord* result = NULL; |
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863 if (!isHumongous(word_size)) { |
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864 result = attempt_allocation(word_size, &gc_count_before, &gclocker_retry_count); |
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865 } else { |
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866 result = attempt_allocation_humongous(word_size, &gc_count_before, &gclocker_retry_count); |
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867 } |
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868 if (result != NULL) { |
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869 return result; |
342 | 870 } |
871 | |
872 // Create the garbage collection operation... | |
1973 | 873 VM_G1CollectForAllocation op(gc_count_before, word_size); |
342 | 874 // ...and get the VM thread to execute it. |
875 VMThread::execute(&op); | |
1973 | 876 |
877 if (op.prologue_succeeded() && op.pause_succeeded()) { | |
878 // If the operation was successful we'll return the result even | |
879 // if it is NULL. If the allocation attempt failed immediately | |
880 // after a Full GC, it's unlikely we'll be able to allocate now. | |
881 HeapWord* result = op.result(); | |
882 if (result != NULL && !isHumongous(word_size)) { | |
883 // Allocations that take place on VM operations do not do any | |
884 // card dirtying and we have to do it here. We only have to do | |
885 // this for non-humongous allocations, though. | |
886 dirty_young_block(result, word_size); | |
887 } | |
342 | 888 return result; |
1973 | 889 } else { |
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890 if (gclocker_retry_count > GCLockerRetryAllocationCount) { |
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891 return NULL; |
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892 } |
1973 | 893 assert(op.result() == NULL, |
894 "the result should be NULL if the VM op did not succeed"); | |
342 | 895 } |
896 | |
897 // Give a warning if we seem to be looping forever. | |
898 if ((QueuedAllocationWarningCount > 0) && | |
899 (try_count % QueuedAllocationWarningCount == 0)) { | |
1973 | 900 warning("G1CollectedHeap::mem_allocate retries %d times", try_count); |
342 | 901 } |
902 } | |
1973 | 903 |
904 ShouldNotReachHere(); | |
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905 return NULL; |
342 | 906 } |
907 | |
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908 HeapWord* G1CollectedHeap::attempt_allocation_slow(size_t word_size, |
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909 unsigned int *gc_count_before_ret, |
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910 int* gclocker_retry_count_ret) { |
2433
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911 // Make sure you read the note in attempt_allocation_humongous(). |
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912 |
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913 assert_heap_not_locked_and_not_at_safepoint(); |
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914 assert(!isHumongous(word_size), "attempt_allocation_slow() should not " |
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915 "be called for humongous allocation requests"); |
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916 |
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917 // We should only get here after the first-level allocation attempt |
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918 // (attempt_allocation()) failed to allocate. |
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919 |
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920 // We will loop until a) we manage to successfully perform the |
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921 // allocation or b) we successfully schedule a collection which |
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922 // fails to perform the allocation. b) is the only case when we'll |
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923 // return NULL. |
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924 HeapWord* result = NULL; |
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925 for (int try_count = 1; /* we'll return */; try_count += 1) { |
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|
926 bool should_try_gc; |
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|
927 unsigned int gc_count_before; |
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|
928 |
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|
929 { |
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930 MutexLockerEx x(Heap_lock); |
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931 |
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932 result = _mutator_alloc_region.attempt_allocation_locked(word_size, |
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933 false /* bot_updates */); |
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934 if (result != NULL) { |
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|
935 return result; |
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|
936 } |
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|
937 |
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938 // If we reach here, attempt_allocation_locked() above failed to |
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939 // allocate a new region. So the mutator alloc region should be NULL. |
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940 assert(_mutator_alloc_region.get() == NULL, "only way to get here"); |
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941 |
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942 if (GC_locker::is_active_and_needs_gc()) { |
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943 if (g1_policy()->can_expand_young_list()) { |
3914
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944 // No need for an ergo verbose message here, |
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945 // can_expand_young_list() does this when it returns true. |
2433
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946 result = _mutator_alloc_region.attempt_allocation_force(word_size, |
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|
947 false /* bot_updates */); |
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|
948 if (result != NULL) { |
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|
949 return result; |
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|
950 } |
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951 } |
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952 should_try_gc = false; |
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953 } else { |
6106
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954 // The GCLocker may not be active but the GCLocker initiated |
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955 // GC may not yet have been performed (GCLocker::needs_gc() |
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956 // returns true). In this case we do not try this GC and |
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957 // wait until the GCLocker initiated GC is performed, and |
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958 // then retry the allocation. |
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959 if (GC_locker::needs_gc()) { |
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960 should_try_gc = false; |
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961 } else { |
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962 // Read the GC count while still holding the Heap_lock. |
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963 gc_count_before = total_collections(); |
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964 should_try_gc = true; |
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|
965 } |
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966 } |
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967 } |
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968 |
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969 if (should_try_gc) { |
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970 bool succeeded; |
12113
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971 result = do_collection_pause(word_size, gc_count_before, &succeeded, |
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972 GCCause::_g1_inc_collection_pause); |
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973 if (result != NULL) { |
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974 assert(succeeded, "only way to get back a non-NULL result"); |
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975 return result; |
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976 } |
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977 |
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978 if (succeeded) { |
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979 // If we get here we successfully scheduled a collection which |
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980 // failed to allocate. No point in trying to allocate |
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981 // further. We'll just return NULL. |
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982 MutexLockerEx x(Heap_lock); |
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983 *gc_count_before_ret = total_collections(); |
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984 return NULL; |
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985 } |
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986 } else { |
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987 if (*gclocker_retry_count_ret > GCLockerRetryAllocationCount) { |
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988 MutexLockerEx x(Heap_lock); |
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989 *gc_count_before_ret = total_collections(); |
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990 return NULL; |
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991 } |
6106
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992 // The GCLocker is either active or the GCLocker initiated |
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993 // GC has not yet been performed. Stall until it is and |
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994 // then retry the allocation. |
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995 GC_locker::stall_until_clear(); |
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996 (*gclocker_retry_count_ret) += 1; |
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997 } |
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998 |
10405 | 999 // We can reach here if we were unsuccessful in scheduling a |
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1000 // collection (because another thread beat us to it) or if we were |
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1001 // stalled due to the GC locker. In either can we should retry the |
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1002 // allocation attempt in case another thread successfully |
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1003 // performed a collection and reclaimed enough space. We do the |
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1004 // first attempt (without holding the Heap_lock) here and the |
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1005 // follow-on attempt will be at the start of the next loop |
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1006 // iteration (after taking the Heap_lock). |
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1007 result = _mutator_alloc_region.attempt_allocation(word_size, |
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1008 false /* bot_updates */); |
5963
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1009 if (result != NULL) { |
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1010 return result; |
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1011 } |
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1012 |
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1013 // Give a warning if we seem to be looping forever. |
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1014 if ((QueuedAllocationWarningCount > 0) && |
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1015 (try_count % QueuedAllocationWarningCount == 0)) { |
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1016 warning("G1CollectedHeap::attempt_allocation_slow() " |
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1017 "retries %d times", try_count); |
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1018 } |
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1019 } |
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1020 |
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1021 ShouldNotReachHere(); |
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1022 return NULL; |
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1023 } |
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|
1024 |
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1025 HeapWord* G1CollectedHeap::attempt_allocation_humongous(size_t word_size, |
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1026 unsigned int * gc_count_before_ret, |
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1027 int* gclocker_retry_count_ret) { |
2433
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1028 // The structure of this method has a lot of similarities to |
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1029 // attempt_allocation_slow(). The reason these two were not merged |
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1030 // into a single one is that such a method would require several "if |
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1031 // allocation is not humongous do this, otherwise do that" |
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1032 // conditional paths which would obscure its flow. In fact, an early |
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1033 // version of this code did use a unified method which was harder to |
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1034 // follow and, as a result, it had subtle bugs that were hard to |
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1035 // track down. So keeping these two methods separate allows each to |
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1036 // be more readable. It will be good to keep these two in sync as |
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1037 // much as possible. |
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|
1038 |
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|
1039 assert_heap_not_locked_and_not_at_safepoint(); |
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1040 assert(isHumongous(word_size), "attempt_allocation_humongous() " |
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1041 "should only be called for humongous allocations"); |
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|
1042 |
4834
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1043 // Humongous objects can exhaust the heap quickly, so we should check if we |
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1044 // need to start a marking cycle at each humongous object allocation. We do |
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1045 // the check before we do the actual allocation. The reason for doing it |
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1046 // before the allocation is that we avoid having to keep track of the newly |
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|
1047 // allocated memory while we do a GC. |
4910
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|
1048 if (g1_policy()->need_to_start_conc_mark("concurrent humongous allocation", |
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|
1049 word_size)) { |
4834
6a78aa6ac1ff
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|
1050 collect(GCCause::_g1_humongous_allocation); |
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|
1051 } |
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|
1052 |
2433
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1053 // We will loop until a) we manage to successfully perform the |
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1054 // allocation or b) we successfully schedule a collection which |
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1055 // fails to perform the allocation. b) is the only case when we'll |
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|
1056 // return NULL. |
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|
1057 HeapWord* result = NULL; |
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|
1058 for (int try_count = 1; /* we'll return */; try_count += 1) { |
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|
1059 bool should_try_gc; |
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|
1060 unsigned int gc_count_before; |
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|
1061 |
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|
1062 { |
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|
1063 MutexLockerEx x(Heap_lock); |
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|
1064 |
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1065 // Given that humongous objects are not allocated in young |
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1066 // regions, we'll first try to do the allocation without doing a |
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1067 // collection hoping that there's enough space in the heap. |
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|
1068 result = humongous_obj_allocate(word_size); |
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|
1069 if (result != NULL) { |
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|
1070 return result; |
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|
1071 } |
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|
1072 |
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|
1073 if (GC_locker::is_active_and_needs_gc()) { |
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|
1074 should_try_gc = false; |
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|
1075 } else { |
6106
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|
1076 // The GCLocker may not be active but the GCLocker initiated |
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|
1077 // GC may not yet have been performed (GCLocker::needs_gc() |
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|
1078 // returns true). In this case we do not try this GC and |
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|
1079 // wait until the GCLocker initiated GC is performed, and |
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|
1080 // then retry the allocation. |
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|
1081 if (GC_locker::needs_gc()) { |
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|
1082 should_try_gc = false; |
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|
1083 } else { |
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|
1084 // Read the GC count while still holding the Heap_lock. |
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|
1085 gc_count_before = total_collections(); |
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|
1086 should_try_gc = true; |
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|
1087 } |
2433
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1088 } |
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1089 } |
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1090 |
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1091 if (should_try_gc) { |
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1092 // If we failed to allocate the humongous object, we should try to |
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1093 // do a collection pause (if we're allowed) in case it reclaims |
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1094 // enough space for the allocation to succeed after the pause. |
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1095 |
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1096 bool succeeded; |
12113
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1097 result = do_collection_pause(word_size, gc_count_before, &succeeded, |
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1098 GCCause::_g1_humongous_allocation); |
2433
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1099 if (result != NULL) { |
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1100 assert(succeeded, "only way to get back a non-NULL result"); |
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1101 return result; |
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1102 } |
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1103 |
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1104 if (succeeded) { |
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1105 // If we get here we successfully scheduled a collection which |
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1106 // failed to allocate. No point in trying to allocate |
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1107 // further. We'll just return NULL. |
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1108 MutexLockerEx x(Heap_lock); |
4910
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1109 *gc_count_before_ret = total_collections(); |
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1110 return NULL; |
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1111 } |
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1112 } else { |
8853
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1113 if (*gclocker_retry_count_ret > GCLockerRetryAllocationCount) { |
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1114 MutexLockerEx x(Heap_lock); |
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1115 *gc_count_before_ret = total_collections(); |
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1116 return NULL; |
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1117 } |
6106
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1118 // The GCLocker is either active or the GCLocker initiated |
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1119 // GC has not yet been performed. Stall until it is and |
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1120 // then retry the allocation. |
2433
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1121 GC_locker::stall_until_clear(); |
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1122 (*gclocker_retry_count_ret) += 1; |
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1123 } |
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1124 |
10405 | 1125 // We can reach here if we were unsuccessful in scheduling a |
2433
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1126 // collection (because another thread beat us to it) or if we were |
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1127 // stalled due to the GC locker. In either can we should retry the |
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1128 // allocation attempt in case another thread successfully |
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1129 // performed a collection and reclaimed enough space. Give a |
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1130 // warning if we seem to be looping forever. |
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1131 |
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1132 if ((QueuedAllocationWarningCount > 0) && |
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1133 (try_count % QueuedAllocationWarningCount == 0)) { |
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1134 warning("G1CollectedHeap::attempt_allocation_humongous() " |
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1135 "retries %d times", try_count); |
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1136 } |
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1137 } |
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1138 |
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1139 ShouldNotReachHere(); |
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1140 return NULL; |
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1141 } |
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1142 |
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1143 HeapWord* G1CollectedHeap::attempt_allocation_at_safepoint(size_t word_size, |
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1144 bool expect_null_mutator_alloc_region) { |
2152 | 1145 assert_at_safepoint(true /* should_be_vm_thread */); |
2433
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1146 assert(_mutator_alloc_region.get() == NULL || |
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1147 !expect_null_mutator_alloc_region, |
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1148 "the current alloc region was unexpectedly found to be non-NULL"); |
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1149 |
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1150 if (!isHumongous(word_size)) { |
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1151 return _mutator_alloc_region.attempt_allocation_locked(word_size, |
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1152 false /* bot_updates */); |
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1153 } else { |
4829
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1154 HeapWord* result = humongous_obj_allocate(word_size); |
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1155 if (result != NULL && g1_policy()->need_to_start_conc_mark("STW humongous allocation")) { |
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1156 g1_policy()->set_initiate_conc_mark_if_possible(); |
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1157 } |
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1158 return result; |
2433
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1159 } |
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1160 |
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1161 ShouldNotReachHere(); |
342 | 1162 } |
1163 | |
1164 class PostMCRemSetClearClosure: public HeapRegionClosure { | |
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1165 G1CollectedHeap* _g1h; |
342 | 1166 ModRefBarrierSet* _mr_bs; |
1167 public: | |
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1168 PostMCRemSetClearClosure(G1CollectedHeap* g1h, ModRefBarrierSet* mr_bs) : |
12080 | 1169 _g1h(g1h), _mr_bs(mr_bs) {} |
1170 | |
342 | 1171 bool doHeapRegion(HeapRegion* r) { |
12080 | 1172 HeapRegionRemSet* hrrs = r->rem_set(); |
1173 | |
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1174 if (r->continuesHumongous()) { |
12080 | 1175 // We'll assert that the strong code root list and RSet is empty |
1176 assert(hrrs->strong_code_roots_list_length() == 0, "sanity"); | |
1177 assert(hrrs->occupied() == 0, "RSet should be empty"); | |
342 | 1178 return false; |
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1179 } |
12080 | 1180 |
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1181 _g1h->reset_gc_time_stamps(r); |
12080 | 1182 hrrs->clear(); |
342 | 1183 // You might think here that we could clear just the cards |
1184 // corresponding to the used region. But no: if we leave a dirty card | |
1185 // in a region we might allocate into, then it would prevent that card | |
1186 // from being enqueued, and cause it to be missed. | |
1187 // Re: the performance cost: we shouldn't be doing full GC anyway! | |
1188 _mr_bs->clear(MemRegion(r->bottom(), r->end())); | |
12080 | 1189 |
342 | 1190 return false; |
1191 } | |
1192 }; | |
1193 | |
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1194 void G1CollectedHeap::clear_rsets_post_compaction() { |
12343 | 1195 PostMCRemSetClearClosure rs_clear(this, g1_barrier_set()); |
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1196 heap_region_iterate(&rs_clear); |
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1197 } |
342 | 1198 |
626
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1199 class RebuildRSOutOfRegionClosure: public HeapRegionClosure { |
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1200 G1CollectedHeap* _g1h; |
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1201 UpdateRSOopClosure _cl; |
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1202 int _worker_i; |
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1203 public: |
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1204 RebuildRSOutOfRegionClosure(G1CollectedHeap* g1, int worker_i = 0) : |
1861 | 1205 _cl(g1->g1_rem_set(), worker_i), |
626
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1206 _worker_i(worker_i), |
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1207 _g1h(g1) |
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1208 { } |
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1209 |
626
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1210 bool doHeapRegion(HeapRegion* r) { |
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1211 if (!r->continuesHumongous()) { |
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1212 _cl.set_from(r); |
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1213 r->oop_iterate(&_cl); |
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|
1214 } |
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1215 return false; |
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|
1216 } |
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|
1217 }; |
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1218 |
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1219 class ParRebuildRSTask: public AbstractGangTask { |
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1220 G1CollectedHeap* _g1; |
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1221 public: |
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1222 ParRebuildRSTask(G1CollectedHeap* g1) |
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1223 : AbstractGangTask("ParRebuildRSTask"), |
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1224 _g1(g1) |
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1225 { } |
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1226 |
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1227 void work(uint worker_id) { |
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1228 RebuildRSOutOfRegionClosure rebuild_rs(_g1, worker_id); |
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1229 _g1->heap_region_par_iterate_chunked(&rebuild_rs, worker_id, |
4095
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1230 _g1->workers()->active_workers(), |
626
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1231 HeapRegion::RebuildRSClaimValue); |
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1232 } |
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1233 }; |
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1234 |
3778
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1235 class PostCompactionPrinterClosure: public HeapRegionClosure { |
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1236 private: |
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1237 G1HRPrinter* _hr_printer; |
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1238 public: |
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1239 bool doHeapRegion(HeapRegion* hr) { |
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1240 assert(!hr->is_young(), "not expecting to find young regions"); |
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1241 // We only generate output for non-empty regions. |
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1242 if (!hr->is_empty()) { |
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1243 if (!hr->isHumongous()) { |
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1244 _hr_printer->post_compaction(hr, G1HRPrinter::Old); |
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1245 } else if (hr->startsHumongous()) { |
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1246 if (hr->region_num() == 1) { |
3778
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1247 // single humongous region |
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1248 _hr_printer->post_compaction(hr, G1HRPrinter::SingleHumongous); |
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1249 } else { |
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1250 _hr_printer->post_compaction(hr, G1HRPrinter::StartsHumongous); |
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1251 } |
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1252 } else { |
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1253 assert(hr->continuesHumongous(), "only way to get here"); |
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1254 _hr_printer->post_compaction(hr, G1HRPrinter::ContinuesHumongous); |
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1255 } |
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1256 } |
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1257 return false; |
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1258 } |
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1259 |
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1260 PostCompactionPrinterClosure(G1HRPrinter* hr_printer) |
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1261 : _hr_printer(hr_printer) { } |
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1262 }; |
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1263 |
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1264 void G1CollectedHeap::print_hrs_post_compaction() { |
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1265 PostCompactionPrinterClosure cl(hr_printer()); |
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1266 heap_region_iterate(&cl); |
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1267 } |
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1268 |
1973 | 1269 bool G1CollectedHeap::do_collection(bool explicit_gc, |
1656
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1270 bool clear_all_soft_refs, |
342 | 1271 size_t word_size) { |
2152 | 1272 assert_at_safepoint(true /* should_be_vm_thread */); |
1273 | |
1359
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1274 if (GC_locker::check_active_before_gc()) { |
1973 | 1275 return false; |
1359
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1276 } |
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1277 |
10405 | 1278 STWGCTimer* gc_timer = G1MarkSweep::gc_timer(); |
13400
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1279 gc_timer->register_gc_start(); |
10405 | 1280 |
1281 SerialOldTracer* gc_tracer = G1MarkSweep::gc_tracer(); | |
1282 gc_tracer->report_gc_start(gc_cause(), gc_timer->gc_start()); | |
1283 | |
2125
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1284 SvcGCMarker sgcm(SvcGCMarker::FULL); |
342 | 1285 ResourceMark rm; |
1286 | |
4872
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1287 print_heap_before_gc(); |
10405 | 1288 trace_heap_before_gc(gc_tracer); |
838
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1289 |
17866
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1290 size_t metadata_prev_used = MetaspaceAux::used_bytes(); |
6725
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1291 |
2152 | 1292 verify_region_sets_optional(); |
342 | 1293 |
1387
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1294 const bool do_clear_all_soft_refs = clear_all_soft_refs || |
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1295 collector_policy()->should_clear_all_soft_refs(); |
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1296 |
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|
1297 ClearedAllSoftRefs casr(do_clear_all_soft_refs, collector_policy()); |
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1298 |
342 | 1299 { |
1300 IsGCActiveMark x; | |
1301 | |
1302 // Timing | |
6030 | 1303 assert(gc_cause() != GCCause::_java_lang_system_gc || explicit_gc, "invariant"); |
6007
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1304 gclog_or_tty->date_stamp(G1Log::fine() && PrintGCDateStamps); |
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1305 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
6030 | 1306 |
342 | 1307 { |
20190
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1308 GCTraceTime t(GCCauseString("Full GC", gc_cause()), G1Log::fine(), true, NULL, gc_tracer->gc_id()); |
10098
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1309 TraceCollectorStats tcs(g1mm()->full_collection_counters()); |
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1310 TraceMemoryManagerStats tms(true /* fullGC */, gc_cause()); |
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1311 |
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1312 double start = os::elapsedTime(); |
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1313 g1_policy()->record_full_collection_start(); |
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1314 |
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1315 // Note: When we have a more flexible GC logging framework that |
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1316 // allows us to add optional attributes to a GC log record we |
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1317 // could consider timing and reporting how long we wait in the |
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1318 // following two methods. |
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1319 wait_while_free_regions_coming(); |
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1320 // If we start the compaction before the CM threads finish |
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1321 // scanning the root regions we might trip them over as we'll |
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1322 // be moving objects / updating references. So let's wait until |
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1323 // they are done. By telling them to abort, they should complete |
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1324 // early. |
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1325 _cm->root_regions()->abort(); |
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|
1326 _cm->root_regions()->wait_until_scan_finished(); |
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1327 append_secondary_free_list_if_not_empty_with_lock(); |
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1328 |
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1329 gc_prologue(true); |
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|
1330 increment_total_collections(true /* full gc */); |
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1331 increment_old_marking_cycles_started(); |
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|
1332 |
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|
1333 assert(used() == recalculate_used(), "Should be equal"); |
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1334 |
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1335 verify_before_gc(); |
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1336 |
10405 | 1337 pre_full_gc_dump(gc_timer); |
10098
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1338 |
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1339 COMPILER2_PRESENT(DerivedPointerTable::clear()); |
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1340 |
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1341 // Disable discovery and empty the discovered lists |
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1342 // for the CM ref processor. |
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|
1343 ref_processor_cm()->disable_discovery(); |
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1344 ref_processor_cm()->abandon_partial_discovery(); |
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1345 ref_processor_cm()->verify_no_references_recorded(); |
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|
1346 |
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1347 // Abandon current iterations of concurrent marking and concurrent |
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1348 // refinement, if any are in progress. We have to do this before |
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1349 // wait_until_scan_finished() below. |
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|
1350 concurrent_mark()->abort(); |
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|
1351 |
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1352 // Make sure we'll choose a new allocation region afterwards. |
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1353 release_mutator_alloc_region(); |
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|
1354 abandon_gc_alloc_regions(); |
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|
1355 g1_rem_set()->cleanupHRRS(); |
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|
1356 |
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1357 // We should call this after we retire any currently active alloc |
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1358 // regions so that all the ALLOC / RETIRE events are generated |
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1359 // before the start GC event. |
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|
1360 _hr_printer.start_gc(true /* full */, (size_t) total_collections()); |
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1361 |
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1362 // We may have added regions to the current incremental collection |
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1363 // set between the last GC or pause and now. We need to clear the |
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1364 // incremental collection set and then start rebuilding it afresh |
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|
1365 // after this full GC. |
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|
1366 abandon_collection_set(g1_policy()->inc_cset_head()); |
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1367 g1_policy()->clear_incremental_cset(); |
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1368 g1_policy()->stop_incremental_cset_building(); |
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1369 |
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1370 tear_down_region_sets(false /* free_list_only */); |
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1371 g1_policy()->set_gcs_are_young(true); |
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1372 |
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1373 // See the comments in g1CollectedHeap.hpp and |
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1374 // G1CollectedHeap::ref_processing_init() about |
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1375 // how reference processing currently works in G1. |
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|
1376 |
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1377 // Temporarily make discovery by the STW ref processor single threaded (non-MT). |
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1378 ReferenceProcessorMTDiscoveryMutator stw_rp_disc_ser(ref_processor_stw(), false); |
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1379 |
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|
1380 // Temporarily clear the STW ref processor's _is_alive_non_header field. |
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1381 ReferenceProcessorIsAliveMutator stw_rp_is_alive_null(ref_processor_stw(), NULL); |
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|
1382 |
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1383 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, true /*verify_no_refs*/); |
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1384 ref_processor_stw()->setup_policy(do_clear_all_soft_refs); |
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|
1385 |
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|
1386 // Do collection work |
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|
1387 { |
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|
1388 HandleMark hm; // Discard invalid handles created during gc |
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1389 G1MarkSweep::invoke_at_safepoint(ref_processor_stw(), do_clear_all_soft_refs); |
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1390 } |
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|
1391 |
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1392 assert(free_regions() == 0, "we should not have added any free regions"); |
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1393 rebuild_region_sets(false /* free_list_only */); |
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|
1394 |
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1395 // Enqueue any discovered reference objects that have |
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1396 // not been removed from the discovered lists. |
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1397 ref_processor_stw()->enqueue_discovered_references(); |
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|
1398 |
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|
1399 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
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|
1400 |
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|
1401 MemoryService::track_memory_usage(); |
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1402 |
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1403 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
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1404 ref_processor_stw()->verify_no_references_recorded(); |
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1405 |
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1406 // Delete metaspaces for unloaded class loaders and clean up loader_data graph |
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|
1407 ClassLoaderDataGraph::purge(); |
12080 | 1408 MetaspaceAux::verify_metrics(); |
10098
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1409 |
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1410 // Note: since we've just done a full GC, concurrent |
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1411 // marking is no longer active. Therefore we need not |
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1412 // re-enable reference discovery for the CM ref processor. |
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1413 // That will be done at the start of the next marking cycle. |
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|
1414 assert(!ref_processor_cm()->discovery_enabled(), "Postcondition"); |
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1415 ref_processor_cm()->verify_no_references_recorded(); |
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|
1416 |
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|
1417 reset_gc_time_stamp(); |
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1418 // Since everything potentially moved, we will clear all remembered |
10405 | 1419 // sets, and clear all cards. Later we will rebuild remembered |
10098
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1420 // sets. We will also reset the GC time stamps of the regions. |
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1421 clear_rsets_post_compaction(); |
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|
1422 check_gc_time_stamps(); |
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|
1423 |
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|
1424 // Resize the heap if necessary. |
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|
1425 resize_if_necessary_after_full_collection(explicit_gc ? 0 : word_size); |
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|
1426 |
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|
1427 if (_hr_printer.is_active()) { |
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1428 // We should do this after we potentially resize the heap so |
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1429 // that all the COMMIT / UNCOMMIT events are generated before |
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1430 // the end GC event. |
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|
1431 |
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|
1432 print_hrs_post_compaction(); |
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|
1433 _hr_printer.end_gc(true /* full */, (size_t) total_collections()); |
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|
1434 } |
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|
1435 |
10246
194f52aa2f23
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|
1436 G1HotCardCache* hot_card_cache = _cg1r->hot_card_cache(); |
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|
1437 if (hot_card_cache->use_cache()) { |
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|
1438 hot_card_cache->reset_card_counts(); |
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|
1439 hot_card_cache->reset_hot_cache(); |
10098
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|
1440 } |
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|
1441 |
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|
1442 // Rebuild remembered sets of all regions. |
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|
1443 if (G1CollectedHeap::use_parallel_gc_threads()) { |
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|
1444 uint n_workers = |
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|
1445 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
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|
1446 workers()->active_workers(), |
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|
1447 Threads::number_of_non_daemon_threads()); |
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|
1448 assert(UseDynamicNumberOfGCThreads || |
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|
1449 n_workers == workers()->total_workers(), |
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|
1450 "If not dynamic should be using all the workers"); |
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|
1451 workers()->set_active_workers(n_workers); |
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|
1452 // Set parallel threads in the heap (_n_par_threads) only |
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1453 // before a parallel phase and always reset it to 0 after |
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|
1454 // the phase so that the number of parallel threads does |
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1455 // no get carried forward to a serial phase where there |
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1456 // may be code that is "possibly_parallel". |
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|
1457 set_par_threads(n_workers); |
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|
1458 |
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|
1459 ParRebuildRSTask rebuild_rs_task(this); |
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|
1460 assert(check_heap_region_claim_values( |
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|
1461 HeapRegion::InitialClaimValue), "sanity check"); |
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|
1462 assert(UseDynamicNumberOfGCThreads || |
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|
1463 workers()->active_workers() == workers()->total_workers(), |
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|
1464 "Unless dynamic should use total workers"); |
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|
1465 // Use the most recent number of active workers |
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|
1466 assert(workers()->active_workers() > 0, |
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|
1467 "Active workers not properly set"); |
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|
1468 set_par_threads(workers()->active_workers()); |
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|
1469 workers()->run_task(&rebuild_rs_task); |
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|
1470 set_par_threads(0); |
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|
1471 assert(check_heap_region_claim_values( |
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|
1472 HeapRegion::RebuildRSClaimValue), "sanity check"); |
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|
1473 reset_heap_region_claim_values(); |
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|
1474 } else { |
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|
1475 RebuildRSOutOfRegionClosure rebuild_rs(this); |
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|
1476 heap_region_iterate(&rebuild_rs); |
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|
1477 } |
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|
1478 |
12080 | 1479 // Rebuild the strong code root lists for each region |
1480 rebuild_strong_code_roots(); | |
1481 | |
10098
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|
1482 if (true) { // FIXME |
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|
1483 MetaspaceGC::compute_new_size(); |
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1484 } |
342 | 1485 |
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
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545
diff
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|
1486 #ifdef TRACESPINNING |
10098
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|
1487 ParallelTaskTerminator::print_termination_counts(); |
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
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545
diff
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|
1488 #endif |
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
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545
diff
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|
1489 |
10098
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|
1490 // Discard all rset updates |
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|
1491 JavaThread::dirty_card_queue_set().abandon_logs(); |
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|
1492 assert(!G1DeferredRSUpdate |
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|
1493 || (G1DeferredRSUpdate && |
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|
1494 (dirty_card_queue_set().completed_buffers_num() == 0)), "Should not be any"); |
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|
1495 |
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|
1496 _young_list->reset_sampled_info(); |
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|
1497 // At this point there should be no regions in the |
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|
1498 // entire heap tagged as young. |
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|
1499 assert(check_young_list_empty(true /* check_heap */), |
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|
1500 "young list should be empty at this point"); |
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|
1501 |
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|
1502 // Update the number of full collections that have been completed. |
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|
1503 increment_old_marking_cycles_completed(false /* concurrent */); |
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1504 |
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1505 _hrs.verify_optional(); |
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1506 verify_region_sets_optional(); |
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1507 |
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1508 verify_after_gc(); |
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1509 |
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1510 // Start a new incremental collection set for the next pause |
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1511 assert(g1_policy()->collection_set() == NULL, "must be"); |
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1512 g1_policy()->start_incremental_cset_building(); |
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1513 |
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1514 // Clear the _cset_fast_test bitmap in anticipation of adding |
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1515 // regions to the incremental collection set for the next |
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1516 // evacuation pause. |
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1517 clear_cset_fast_test(); |
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1518 |
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1519 init_mutator_alloc_region(); |
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1520 |
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1521 double end = os::elapsedTime(); |
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1522 g1_policy()->record_full_collection_end(); |
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1523 |
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1524 if (G1Log::fine()) { |
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1525 g1_policy()->print_heap_transition(); |
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1526 } |
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1527 |
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1528 // We must call G1MonitoringSupport::update_sizes() in the same scoping level |
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1529 // as an active TraceMemoryManagerStats object (i.e. before the destructor for the |
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1530 // TraceMemoryManagerStats is called) so that the G1 memory pools are updated |
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1531 // before any GC notifications are raised. |
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1532 g1mm()->update_sizes(); |
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1533 |
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1534 gc_epilogue(true); |
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1535 } |
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1536 |
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1537 if (G1Log::finer()) { |
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1538 g1_policy()->print_detailed_heap_transition(true /* full */); |
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1539 } |
6121
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1540 |
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1541 print_heap_after_gc(); |
10405 | 1542 trace_heap_after_gc(gc_tracer); |
1543 | |
1544 post_full_gc_dump(gc_timer); | |
1545 | |
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1546 gc_timer->register_gc_end(); |
10405 | 1547 gc_tracer->report_gc_end(gc_timer->gc_end(), gc_timer->time_partitions()); |
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1548 } |
1973 | 1549 |
1550 return true; | |
342 | 1551 } |
1552 | |
1553 void G1CollectedHeap::do_full_collection(bool clear_all_soft_refs) { | |
1973 | 1554 // do_collection() will return whether it succeeded in performing |
1555 // the GC. Currently, there is no facility on the | |
1556 // do_full_collection() API to notify the caller than the collection | |
1557 // did not succeed (e.g., because it was locked out by the GC | |
1558 // locker). So, right now, we'll ignore the return value. | |
1559 bool dummy = do_collection(true, /* explicit_gc */ | |
1560 clear_all_soft_refs, | |
1561 0 /* word_size */); | |
342 | 1562 } |
1563 | |
1564 // This code is mostly copied from TenuredGeneration. | |
1565 void | |
1566 G1CollectedHeap:: | |
1567 resize_if_necessary_after_full_collection(size_t word_size) { | |
1568 // Include the current allocation, if any, and bytes that will be | |
1569 // pre-allocated to support collections, as "used". | |
1570 const size_t used_after_gc = used(); | |
1571 const size_t capacity_after_gc = capacity(); | |
1572 const size_t free_after_gc = capacity_after_gc - used_after_gc; | |
1573 | |
1717
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1574 // This is enforced in arguments.cpp. |
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1575 assert(MinHeapFreeRatio <= MaxHeapFreeRatio, |
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1576 "otherwise the code below doesn't make sense"); |
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1577 |
342 | 1578 // We don't have floating point command-line arguments |
1717
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1579 const double minimum_free_percentage = (double) MinHeapFreeRatio / 100.0; |
342 | 1580 const double maximum_used_percentage = 1.0 - minimum_free_percentage; |
1717
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1581 const double maximum_free_percentage = (double) MaxHeapFreeRatio / 100.0; |
342 | 1582 const double minimum_used_percentage = 1.0 - maximum_free_percentage; |
1583 | |
1717
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1584 const size_t min_heap_size = collector_policy()->min_heap_byte_size(); |
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1585 const size_t max_heap_size = collector_policy()->max_heap_byte_size(); |
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1586 |
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1587 // We have to be careful here as these two calculations can overflow |
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1588 // 32-bit size_t's. |
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1589 double used_after_gc_d = (double) used_after_gc; |
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1590 double minimum_desired_capacity_d = used_after_gc_d / maximum_used_percentage; |
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1591 double maximum_desired_capacity_d = used_after_gc_d / minimum_used_percentage; |
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1592 |
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1593 // Let's make sure that they are both under the max heap size, which |
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1594 // by default will make them fit into a size_t. |
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1595 double desired_capacity_upper_bound = (double) max_heap_size; |
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1596 minimum_desired_capacity_d = MIN2(minimum_desired_capacity_d, |
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1597 desired_capacity_upper_bound); |
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1598 maximum_desired_capacity_d = MIN2(maximum_desired_capacity_d, |
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1599 desired_capacity_upper_bound); |
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1600 |
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1601 // We can now safely turn them into size_t's. |
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1602 size_t minimum_desired_capacity = (size_t) minimum_desired_capacity_d; |
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1603 size_t maximum_desired_capacity = (size_t) maximum_desired_capacity_d; |
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1604 |
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1605 // This assert only makes sense here, before we adjust them |
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1606 // with respect to the min and max heap size. |
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1607 assert(minimum_desired_capacity <= maximum_desired_capacity, |
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1608 err_msg("minimum_desired_capacity = "SIZE_FORMAT", " |
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1609 "maximum_desired_capacity = "SIZE_FORMAT, |
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1610 minimum_desired_capacity, maximum_desired_capacity)); |
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1611 |
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1612 // Should not be greater than the heap max size. No need to adjust |
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1613 // it with respect to the heap min size as it's a lower bound (i.e., |
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1614 // we'll try to make the capacity larger than it, not smaller). |
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1615 minimum_desired_capacity = MIN2(minimum_desired_capacity, max_heap_size); |
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1616 // Should not be less than the heap min size. No need to adjust it |
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1617 // with respect to the heap max size as it's an upper bound (i.e., |
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1618 // we'll try to make the capacity smaller than it, not greater). |
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1619 maximum_desired_capacity = MAX2(maximum_desired_capacity, min_heap_size); |
342 | 1620 |
1717
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1621 if (capacity_after_gc < minimum_desired_capacity) { |
342 | 1622 // Don't expand unless it's significant |
1623 size_t expand_bytes = minimum_desired_capacity - capacity_after_gc; | |
3914
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1624 ergo_verbose4(ErgoHeapSizing, |
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1625 "attempt heap expansion", |
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1626 ergo_format_reason("capacity lower than " |
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1627 "min desired capacity after Full GC") |
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1628 ergo_format_byte("capacity") |
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1629 ergo_format_byte("occupancy") |
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1630 ergo_format_byte_perc("min desired capacity"), |
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1631 capacity_after_gc, used_after_gc, |
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1632 minimum_desired_capacity, (double) MinHeapFreeRatio); |
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1633 expand(expand_bytes); |
342 | 1634 |
1635 // No expansion, now see if we want to shrink | |
1717
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1636 } else if (capacity_after_gc > maximum_desired_capacity) { |
342 | 1637 // Capacity too large, compute shrinking size |
1638 size_t shrink_bytes = capacity_after_gc - maximum_desired_capacity; | |
3914
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1639 ergo_verbose4(ErgoHeapSizing, |
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1640 "attempt heap shrinking", |
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1641 ergo_format_reason("capacity higher than " |
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1642 "max desired capacity after Full GC") |
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1643 ergo_format_byte("capacity") |
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1644 ergo_format_byte("occupancy") |
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1645 ergo_format_byte_perc("max desired capacity"), |
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1646 capacity_after_gc, used_after_gc, |
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1647 maximum_desired_capacity, (double) MaxHeapFreeRatio); |
342 | 1648 shrink(shrink_bytes); |
1649 } | |
1650 } | |
1651 | |
1652 | |
1653 HeapWord* | |
1973 | 1654 G1CollectedHeap::satisfy_failed_allocation(size_t word_size, |
1655 bool* succeeded) { | |
2152 | 1656 assert_at_safepoint(true /* should_be_vm_thread */); |
1973 | 1657 |
1658 *succeeded = true; | |
1659 // Let's attempt the allocation first. | |
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1660 HeapWord* result = |
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1661 attempt_allocation_at_safepoint(word_size, |
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1662 false /* expect_null_mutator_alloc_region */); |
1973 | 1663 if (result != NULL) { |
1664 assert(*succeeded, "sanity"); | |
1665 return result; | |
1666 } | |
342 | 1667 |
1668 // In a G1 heap, we're supposed to keep allocation from failing by | |
1669 // incremental pauses. Therefore, at least for now, we'll favor | |
1670 // expansion over collection. (This might change in the future if we can | |
1671 // do something smarter than full collection to satisfy a failed alloc.) | |
1672 result = expand_and_allocate(word_size); | |
1673 if (result != NULL) { | |
1973 | 1674 assert(*succeeded, "sanity"); |
342 | 1675 return result; |
1676 } | |
1677 | |
1973 | 1678 // Expansion didn't work, we'll try to do a Full GC. |
1679 bool gc_succeeded = do_collection(false, /* explicit_gc */ | |
1680 false, /* clear_all_soft_refs */ | |
1681 word_size); | |
1682 if (!gc_succeeded) { | |
1683 *succeeded = false; | |
1684 return NULL; | |
1685 } | |
1686 | |
1687 // Retry the allocation | |
1688 result = attempt_allocation_at_safepoint(word_size, | |
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1689 true /* expect_null_mutator_alloc_region */); |
342 | 1690 if (result != NULL) { |
1973 | 1691 assert(*succeeded, "sanity"); |
342 | 1692 return result; |
1693 } | |
1694 | |
1973 | 1695 // Then, try a Full GC that will collect all soft references. |
1696 gc_succeeded = do_collection(false, /* explicit_gc */ | |
1697 true, /* clear_all_soft_refs */ | |
1698 word_size); | |
1699 if (!gc_succeeded) { | |
1700 *succeeded = false; | |
1701 return NULL; | |
1702 } | |
1703 | |
1704 // Retry the allocation once more | |
1705 result = attempt_allocation_at_safepoint(word_size, | |
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1706 true /* expect_null_mutator_alloc_region */); |
342 | 1707 if (result != NULL) { |
1973 | 1708 assert(*succeeded, "sanity"); |
342 | 1709 return result; |
1710 } | |
1711 | |
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1712 assert(!collector_policy()->should_clear_all_soft_refs(), |
1973 | 1713 "Flag should have been handled and cleared prior to this point"); |
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1714 |
342 | 1715 // What else? We might try synchronous finalization later. If the total |
1716 // space available is large enough for the allocation, then a more | |
1717 // complete compaction phase than we've tried so far might be | |
1718 // appropriate. | |
1973 | 1719 assert(*succeeded, "sanity"); |
342 | 1720 return NULL; |
1721 } | |
1722 | |
1723 // Attempting to expand the heap sufficiently | |
1724 // to support an allocation of the given "word_size". If | |
1725 // successful, perform the allocation and return the address of the | |
1726 // allocated block, or else "NULL". | |
1727 | |
1728 HeapWord* G1CollectedHeap::expand_and_allocate(size_t word_size) { | |
2152 | 1729 assert_at_safepoint(true /* should_be_vm_thread */); |
1730 | |
1731 verify_region_sets_optional(); | |
1973 | 1732 |
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1733 size_t expand_bytes = MAX2(word_size * HeapWordSize, MinHeapDeltaBytes); |
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1734 ergo_verbose1(ErgoHeapSizing, |
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1735 "attempt heap expansion", |
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1736 ergo_format_reason("allocation request failed") |
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1737 ergo_format_byte("allocation request"), |
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1738 word_size * HeapWordSize); |
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1739 if (expand(expand_bytes)) { |
3766 | 1740 _hrs.verify_optional(); |
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1741 verify_region_sets_optional(); |
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1742 return attempt_allocation_at_safepoint(word_size, |
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1743 false /* expect_null_mutator_alloc_region */); |
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1744 } |
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1745 return NULL; |
342 | 1746 } |
1747 | |
3766 | 1748 void G1CollectedHeap::update_committed_space(HeapWord* old_end, |
1749 HeapWord* new_end) { | |
1750 assert(old_end != new_end, "don't call this otherwise"); | |
1751 assert((HeapWord*) _g1_storage.high() == new_end, "invariant"); | |
1752 | |
1753 // Update the committed mem region. | |
1754 _g1_committed.set_end(new_end); | |
1755 // Tell the card table about the update. | |
1756 Universe::heap()->barrier_set()->resize_covered_region(_g1_committed); | |
1757 // Tell the BOT about the update. | |
1758 _bot_shared->resize(_g1_committed.word_size()); | |
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1759 // Tell the hot card cache about the update |
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1760 _cg1r->hot_card_cache()->resize_card_counts(capacity()); |
3766 | 1761 } |
1762 | |
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1763 bool G1CollectedHeap::expand(size_t expand_bytes) { |
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1764 size_t aligned_expand_bytes = ReservedSpace::page_align_size_up(expand_bytes); |
342 | 1765 aligned_expand_bytes = align_size_up(aligned_expand_bytes, |
1766 HeapRegion::GrainBytes); | |
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1767 ergo_verbose2(ErgoHeapSizing, |
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1768 "expand the heap", |
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1769 ergo_format_byte("requested expansion amount") |
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1770 ergo_format_byte("attempted expansion amount"), |
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1771 expand_bytes, aligned_expand_bytes); |
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1772 |
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1773 if (_g1_storage.uncommitted_size() == 0) { |
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1774 ergo_verbose0(ErgoHeapSizing, |
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1775 "did not expand the heap", |
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1776 ergo_format_reason("heap already fully expanded")); |
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1777 return false; |
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1778 } |
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1779 |
3766 | 1780 // First commit the memory. |
1781 HeapWord* old_end = (HeapWord*) _g1_storage.high(); | |
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1782 bool successful = _g1_storage.expand_by(aligned_expand_bytes); |
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1783 if (successful) { |
3766 | 1784 // Then propagate this update to the necessary data structures. |
1785 HeapWord* new_end = (HeapWord*) _g1_storage.high(); | |
1786 update_committed_space(old_end, new_end); | |
1787 | |
1788 FreeRegionList expansion_list("Local Expansion List"); | |
1789 MemRegion mr = _hrs.expand_by(old_end, new_end, &expansion_list); | |
1790 assert(mr.start() == old_end, "post-condition"); | |
1791 // mr might be a smaller region than what was requested if | |
1792 // expand_by() was unable to allocate the HeapRegion instances | |
1793 assert(mr.end() <= new_end, "post-condition"); | |
1794 | |
1795 size_t actual_expand_bytes = mr.byte_size(); | |
1796 assert(actual_expand_bytes <= aligned_expand_bytes, "post-condition"); | |
1797 assert(actual_expand_bytes == expansion_list.total_capacity_bytes(), | |
1798 "post-condition"); | |
1799 if (actual_expand_bytes < aligned_expand_bytes) { | |
1800 // We could not expand _hrs to the desired size. In this case we | |
1801 // need to shrink the committed space accordingly. | |
1802 assert(mr.end() < new_end, "invariant"); | |
1803 | |
1804 size_t diff_bytes = aligned_expand_bytes - actual_expand_bytes; | |
1805 // First uncommit the memory. | |
1806 _g1_storage.shrink_by(diff_bytes); | |
1807 // Then propagate this update to the necessary data structures. | |
1808 update_committed_space(new_end, mr.end()); | |
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1809 } |
3766 | 1810 _free_list.add_as_tail(&expansion_list); |
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1811 |
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1812 if (_hr_printer.is_active()) { |
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1813 HeapWord* curr = mr.start(); |
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1814 while (curr < mr.end()) { |
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1815 HeapWord* curr_end = curr + HeapRegion::GrainWords; |
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1816 _hr_printer.commit(curr, curr_end); |
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1817 curr = curr_end; |
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1818 } |
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1819 assert(curr == mr.end(), "post-condition"); |
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1820 } |
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1821 g1_policy()->record_new_heap_size(n_regions()); |
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1822 } else { |
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1823 ergo_verbose0(ErgoHeapSizing, |
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1824 "did not expand the heap", |
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1825 ergo_format_reason("heap expansion operation failed")); |
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1826 // The expansion of the virtual storage space was unsuccessful. |
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1827 // Let's see if it was because we ran out of swap. |
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1828 if (G1ExitOnExpansionFailure && |
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1829 _g1_storage.uncommitted_size() >= aligned_expand_bytes) { |
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1830 // We had head room... |
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1831 vm_exit_out_of_memory(aligned_expand_bytes, OOM_MMAP_ERROR, "G1 heap expansion"); |
342 | 1832 } |
1833 } | |
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1834 return successful; |
342 | 1835 } |
1836 | |
3766 | 1837 void G1CollectedHeap::shrink_helper(size_t shrink_bytes) { |
342 | 1838 size_t aligned_shrink_bytes = |
1839 ReservedSpace::page_align_size_down(shrink_bytes); | |
1840 aligned_shrink_bytes = align_size_down(aligned_shrink_bytes, | |
1841 HeapRegion::GrainBytes); | |
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1842 uint num_regions_to_remove = (uint)(shrink_bytes / HeapRegion::GrainBytes); |
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1843 |
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1844 uint num_regions_removed = _hrs.shrink_by(num_regions_to_remove); |
3766 | 1845 HeapWord* old_end = (HeapWord*) _g1_storage.high(); |
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1846 size_t shrunk_bytes = num_regions_removed * HeapRegion::GrainBytes; |
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1847 |
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1848 ergo_verbose3(ErgoHeapSizing, |
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1849 "shrink the heap", |
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1850 ergo_format_byte("requested shrinking amount") |
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1851 ergo_format_byte("aligned shrinking amount") |
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1852 ergo_format_byte("attempted shrinking amount"), |
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1853 shrink_bytes, aligned_shrink_bytes, shrunk_bytes); |
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1854 if (num_regions_removed > 0) { |
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1855 _g1_storage.shrink_by(shrunk_bytes); |
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1856 HeapWord* new_end = (HeapWord*) _g1_storage.high(); |
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1857 |
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1858 if (_hr_printer.is_active()) { |
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1859 HeapWord* curr = old_end; |
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1860 while (curr > new_end) { |
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1861 HeapWord* curr_end = curr; |
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1862 curr -= HeapRegion::GrainWords; |
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1863 _hr_printer.uncommit(curr, curr_end); |
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1864 } |
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1865 } |
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1866 |
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1867 _expansion_regions += num_regions_removed; |
3766 | 1868 update_committed_space(old_end, new_end); |
1869 HeapRegionRemSet::shrink_heap(n_regions()); | |
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1870 g1_policy()->record_new_heap_size(n_regions()); |
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1871 } else { |
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1872 ergo_verbose0(ErgoHeapSizing, |
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1873 "did not shrink the heap", |
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1874 ergo_format_reason("heap shrinking operation failed")); |
342 | 1875 } |
1876 } | |
1877 | |
1878 void G1CollectedHeap::shrink(size_t shrink_bytes) { | |
2152 | 1879 verify_region_sets_optional(); |
1880 | |
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1881 // We should only reach here at the end of a Full GC which means we |
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1882 // should not not be holding to any GC alloc regions. The method |
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1883 // below will make sure of that and do any remaining clean up. |
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1884 abandon_gc_alloc_regions(); |
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1885 |
2152 | 1886 // Instead of tearing down / rebuilding the free lists here, we |
1887 // could instead use the remove_all_pending() method on free_list to | |
1888 // remove only the ones that we need to remove. | |
4072 | 1889 tear_down_region_sets(true /* free_list_only */); |
342 | 1890 shrink_helper(shrink_bytes); |
4072 | 1891 rebuild_region_sets(true /* free_list_only */); |
2152 | 1892 |
3766 | 1893 _hrs.verify_optional(); |
2152 | 1894 verify_region_sets_optional(); |
342 | 1895 } |
1896 | |
1897 // Public methods. | |
1898 | |
1899 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away | |
1900 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list | |
1901 #endif // _MSC_VER | |
1902 | |
1903 | |
1904 G1CollectedHeap::G1CollectedHeap(G1CollectorPolicy* policy_) : | |
1905 SharedHeap(policy_), | |
1906 _g1_policy(policy_), | |
1111 | 1907 _dirty_card_queue_set(false), |
1705 | 1908 _into_cset_dirty_card_queue_set(false), |
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1909 _is_alive_closure_cm(this), |
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1910 _is_alive_closure_stw(this), |
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1911 _ref_processor_cm(NULL), |
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1912 _ref_processor_stw(NULL), |
342 | 1913 _process_strong_tasks(new SubTasksDone(G1H_PS_NumElements)), |
1914 _bot_shared(NULL), | |
10405 | 1915 _evac_failure_scan_stack(NULL), |
342 | 1916 _mark_in_progress(false), |
2152 | 1917 _cg1r(NULL), _summary_bytes_used(0), |
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1918 _g1mm(NULL), |
342 | 1919 _refine_cte_cl(NULL), |
1920 _full_collection(false), | |
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1921 _free_list("Master Free List", new MasterFreeRegionListMtSafeChecker()), |
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1922 _secondary_free_list("Secondary Free List", new SecondaryFreeRegionListMtSafeChecker()), |
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1923 _old_set("Old Set", false /* humongous */, new OldRegionSetMtSafeChecker()), |
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1924 _humongous_set("Master Humongous Set", true /* humongous */, new HumongousRegionSetMtSafeChecker()), |
2152 | 1925 _free_regions_coming(false), |
342 | 1926 _young_list(new YoungList(this)), |
1927 _gc_time_stamp(0), | |
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1928 _retained_old_gc_alloc_region(NULL), |
6595 | 1929 _survivor_plab_stats(YoungPLABSize, PLABWeight), |
1930 _old_plab_stats(OldPLABSize, PLABWeight), | |
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1931 _expand_heap_after_alloc_failure(true), |
526 | 1932 _surviving_young_words(NULL), |
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1933 _old_marking_cycles_started(0), |
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1934 _old_marking_cycles_completed(0), |
10405 | 1935 _concurrent_cycle_started(false), |
526 | 1936 _in_cset_fast_test(NULL), |
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1937 _in_cset_fast_test_base(NULL), |
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1938 _dirty_cards_region_list(NULL), |
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1939 _worker_cset_start_region(NULL), |
10405 | 1940 _worker_cset_start_region_time_stamp(NULL), |
1941 _gc_timer_stw(new (ResourceObj::C_HEAP, mtGC) STWGCTimer()), | |
1942 _gc_timer_cm(new (ResourceObj::C_HEAP, mtGC) ConcurrentGCTimer()), | |
1943 _gc_tracer_stw(new (ResourceObj::C_HEAP, mtGC) G1NewTracer()), | |
1944 _gc_tracer_cm(new (ResourceObj::C_HEAP, mtGC) G1OldTracer()) { | |
1945 | |
1946 _g1h = this; | |
342 | 1947 if (_process_strong_tasks == NULL || !_process_strong_tasks->valid()) { |
1948 vm_exit_during_initialization("Failed necessary allocation."); | |
1949 } | |
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1950 |
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1951 _humongous_object_threshold_in_words = HeapRegion::GrainWords / 2; |
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1952 |
342 | 1953 int n_queues = MAX2((int)ParallelGCThreads, 1); |
1954 _task_queues = new RefToScanQueueSet(n_queues); | |
1955 | |
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1956 uint n_rem_sets = HeapRegionRemSet::num_par_rem_sets(); |
342 | 1957 assert(n_rem_sets > 0, "Invariant."); |
1958 | |
6197 | 1959 _worker_cset_start_region = NEW_C_HEAP_ARRAY(HeapRegion*, n_queues, mtGC); |
1960 _worker_cset_start_region_time_stamp = NEW_C_HEAP_ARRAY(unsigned int, n_queues, mtGC); | |
10405 | 1961 _evacuation_failed_info_array = NEW_C_HEAP_ARRAY(EvacuationFailedInfo, n_queues, mtGC); |
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1962 |
342 | 1963 for (int i = 0; i < n_queues; i++) { |
1964 RefToScanQueue* q = new RefToScanQueue(); | |
1965 q->initialize(); | |
1966 _task_queues->register_queue(i, q); | |
10405 | 1967 ::new (&_evacuation_failed_info_array[i]) EvacuationFailedInfo(); |
1968 } | |
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1969 clear_cset_start_regions(); |
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1970 |
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1971 // Initialize the G1EvacuationFailureALot counters and flags. |
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1972 NOT_PRODUCT(reset_evacuation_should_fail();) |
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1973 |
342 | 1974 guarantee(_task_queues != NULL, "task_queues allocation failure."); |
1975 } | |
1976 | |
1977 jint G1CollectedHeap::initialize() { | |
1166 | 1978 CollectedHeap::pre_initialize(); |
342 | 1979 os::enable_vtime(); |
1980 | |
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1981 G1Log::init(); |
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1982 |
342 | 1983 // Necessary to satisfy locking discipline assertions. |
1984 | |
1985 MutexLocker x(Heap_lock); | |
1986 | |
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1987 // We have to initialize the printer before committing the heap, as |
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1988 // it will be used then. |
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1989 _hr_printer.set_active(G1PrintHeapRegions); |
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1990 |
342 | 1991 // While there are no constraints in the GC code that HeapWordSize |
1992 // be any particular value, there are multiple other areas in the | |
1993 // system which believe this to be true (e.g. oop->object_size in some | |
1994 // cases incorrectly returns the size in wordSize units rather than | |
1995 // HeapWordSize). | |
1996 guarantee(HeapWordSize == wordSize, "HeapWordSize must equal wordSize"); | |
1997 | |
1998 size_t init_byte_size = collector_policy()->initial_heap_byte_size(); | |
1999 size_t max_byte_size = collector_policy()->max_heap_byte_size(); | |
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2000 size_t heap_alignment = collector_policy()->heap_alignment(); |
342 | 2001 |
2002 // Ensure that the sizes are properly aligned. | |
2003 Universe::check_alignment(init_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
2004 Universe::check_alignment(max_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
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2005 Universe::check_alignment(max_byte_size, heap_alignment, "g1 heap"); |
342 | 2006 |
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2007 _cg1r = new ConcurrentG1Refine(this); |
342 | 2008 |
2009 // Reserve the maximum. | |
642
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2010 |
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2011 // When compressed oops are enabled, the preferred heap base |
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2012 // is calculated by subtracting the requested size from the |
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2013 // 32Gb boundary and using the result as the base address for |
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2014 // heap reservation. If the requested size is not aligned to |
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2015 // HeapRegion::GrainBytes (i.e. the alignment that is passed |
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2016 // into the ReservedHeapSpace constructor) then the actual |
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2017 // base of the reserved heap may end up differing from the |
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2018 // address that was requested (i.e. the preferred heap base). |
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2019 // If this happens then we could end up using a non-optimal |
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2020 // compressed oops mode. |
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2021 |
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2022 ReservedSpace heap_rs = Universe::reserve_heap(max_byte_size, |
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2023 heap_alignment); |
342 | 2024 |
2025 // It is important to do this in a way such that concurrent readers can't | |
10405 | 2026 // temporarily think something is in the heap. (I've actually seen this |
342 | 2027 // happen in asserts: DLD.) |
2028 _reserved.set_word_size(0); | |
2029 _reserved.set_start((HeapWord*)heap_rs.base()); | |
2030 _reserved.set_end((HeapWord*)(heap_rs.base() + heap_rs.size())); | |
2031 | |
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2032 _expansion_regions = (uint) (max_byte_size / HeapRegion::GrainBytes); |
342 | 2033 |
2034 // Create the gen rem set (and barrier set) for the entire reserved region. | |
2035 _rem_set = collector_policy()->create_rem_set(_reserved, 2); | |
2036 set_barrier_set(rem_set()->bs()); | |
12343 | 2037 if (!barrier_set()->is_a(BarrierSet::G1SATBCTLogging)) { |
2038 vm_exit_during_initialization("G1 requires a G1SATBLoggingCardTableModRefBS"); | |
342 | 2039 return JNI_ENOMEM; |
2040 } | |
2041 | |
2042 // Also create a G1 rem set. | |
12343 | 2043 _g1_rem_set = new G1RemSet(this, g1_barrier_set()); |
342 | 2044 |
2045 // Carve out the G1 part of the heap. | |
2046 | |
2047 ReservedSpace g1_rs = heap_rs.first_part(max_byte_size); | |
2048 _g1_reserved = MemRegion((HeapWord*)g1_rs.base(), | |
2049 g1_rs.size()/HeapWordSize); | |
2050 | |
2051 _g1_storage.initialize(g1_rs, 0); | |
2052 _g1_committed = MemRegion((HeapWord*)_g1_storage.low(), (size_t) 0); | |
3766 | 2053 _hrs.initialize((HeapWord*) _g1_reserved.start(), |
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2054 (HeapWord*) _g1_reserved.end()); |
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2055 assert(_hrs.max_length() == _expansion_regions, |
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2056 err_msg("max length: %u expansion regions: %u", |
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2057 _hrs.max_length(), _expansion_regions)); |
342 | 2058 |
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2059 // Do later initialization work for concurrent refinement. |
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2060 _cg1r->init(); |
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2061 |
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2062 // 6843694 - ensure that the maximum region index can fit |
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2063 // in the remembered set structures. |
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2064 const uint max_region_idx = (1U << (sizeof(RegionIdx_t)*BitsPerByte-1)) - 1; |
807
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2065 guarantee((max_regions() - 1) <= max_region_idx, "too many regions"); |
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2066 |
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2067 size_t max_cards_per_region = ((size_t)1 << (sizeof(CardIdx_t)*BitsPerByte-1)) - 1; |
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2068 guarantee(HeapRegion::CardsPerRegion > 0, "make sure it's initialized"); |
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2069 guarantee(HeapRegion::CardsPerRegion < max_cards_per_region, |
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2070 "too many cards per region"); |
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2071 |
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2072 FreeRegionList::set_unrealistically_long_length(max_regions() + 1); |
2152 | 2073 |
342 | 2074 _bot_shared = new G1BlockOffsetSharedArray(_reserved, |
2075 heap_word_size(init_byte_size)); | |
2076 | |
2077 _g1h = this; | |
2078 | |
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2079 _in_cset_fast_test_length = max_regions(); |
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2080 _in_cset_fast_test_base = |
6197 | 2081 NEW_C_HEAP_ARRAY(bool, (size_t) _in_cset_fast_test_length, mtGC); |
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2082 |
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2083 // We're biasing _in_cset_fast_test to avoid subtracting the |
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2084 // beginning of the heap every time we want to index; basically |
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
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10242
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changeset
|
2085 // 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
johnc
parents:
10242
diff
changeset
|
2086 _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
|
2087 ((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
|
2088 |
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2089 // 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
parents:
10242
diff
changeset
|
2090 // regions to the incremental collection set for the first |
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2091 // evacuation pause. |
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
2092 clear_cset_fast_test(); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
2093 |
342 | 2094 // Create the ConcurrentMark data structure and thread. |
2095 // (Must do this late, so that "max_regions" is defined.) | |
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2096 _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
|
2097 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
|
2098 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
|
2099 return JNI_ENOMEM; |
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2100 } |
342 | 2101 _cmThread = _cm->cmThread(); |
2102 | |
2103 // Initialize the from_card cache structure of HeapRegionRemSet. | |
2104 HeapRegionRemSet::init_heap(max_regions()); | |
2105 | |
677 | 2106 // Now expand into the initial heap size. |
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2107 if (!expand(init_byte_size)) { |
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
7207
diff
changeset
|
2108 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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|
2109 return JNI_ENOMEM; |
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
2110 } |
342 | 2111 |
2112 // Perform any initialization actions delegated to the policy. | |
2113 g1_policy()->init(); | |
2114 | |
2115 _refine_cte_cl = | |
20192 | 2116 new RefineCardTableEntryClosure(g1_rem_set(), |
342 | 2117 concurrent_g1_refine()); |
2118 JavaThread::dirty_card_queue_set().set_closure(_refine_cte_cl); | |
2119 | |
2120 JavaThread::satb_mark_queue_set().initialize(SATB_Q_CBL_mon, | |
2121 SATB_Q_FL_lock, | |
1111 | 2122 G1SATBProcessCompletedThreshold, |
342 | 2123 Shared_SATB_Q_lock); |
794 | 2124 |
2125 JavaThread::dirty_card_queue_set().initialize(DirtyCardQ_CBL_mon, | |
2126 DirtyCardQ_FL_lock, | |
1111 | 2127 concurrent_g1_refine()->yellow_zone(), |
2128 concurrent_g1_refine()->red_zone(), | |
794 | 2129 Shared_DirtyCardQ_lock); |
2130 | |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2131 if (G1DeferredRSUpdate) { |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2132 dirty_card_queue_set().initialize(DirtyCardQ_CBL_mon, |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2133 DirtyCardQ_FL_lock, |
1111 | 2134 -1, // never trigger processing |
2135 -1, // no limit on length | |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2136 Shared_DirtyCardQ_lock, |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2137 &JavaThread::dirty_card_queue_set()); |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
2138 } |
1705 | 2139 |
2140 // Initialize the card queue set used to hold cards containing | |
2141 // references into the collection set. | |
2142 _into_cset_dirty_card_queue_set.initialize(DirtyCardQ_CBL_mon, | |
2143 DirtyCardQ_FL_lock, | |
2144 -1, // never trigger processing | |
2145 -1, // no limit on length | |
2146 Shared_DirtyCardQ_lock, | |
2147 &JavaThread::dirty_card_queue_set()); | |
2148 | |
342 | 2149 // In case we're keeping closure specialization stats, initialize those |
2150 // counts and that mechanism. | |
2151 SpecializationStats::clear(); | |
2152 | |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2153 // 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
|
2154 // 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
|
2155 // space here, lots of asserts fire. |
3766 | 2156 |
2157 HeapRegion* dummy_region = new_heap_region(0 /* index of bottom region */, | |
2158 _g1_reserved.start()); | |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2159 // 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
|
2160 // 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
|
2161 // region will complain that it cannot support allocations without |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2162 // 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
|
2163 dummy_region->set_young(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2164 // Make sure it's full. |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2165 dummy_region->set_top(dummy_region->end()); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2166 G1AllocRegion::setup(this, dummy_region); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2167 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2168 init_mutator_alloc_region(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2169 |
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
2170 // 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
|
2171 // values in the heap have been properly initialized. |
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
2172 _g1mm = new G1MonitoringSupport(this); |
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
2173 |
17764 | 2174 G1StringDedup::initialize(); |
2175 | |
342 | 2176 return JNI_OK; |
2177 } | |
2178 | |
17947
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
17937
diff
changeset
|
2179 void G1CollectedHeap::stop() { |
17992 | 2180 // Stop all concurrent threads. We do this to make sure these threads |
2181 // do not continue to execute and access resources (e.g. gclog_or_tty) | |
17947
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
17937
diff
changeset
|
2182 // that are destroyed during shutdown. |
17992 | 2183 _cg1r->stop(); |
2184 _cmThread->stop(); | |
2185 if (G1StringDedup::is_enabled()) { | |
2186 G1StringDedup::stop(); | |
2187 } | |
17947
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
17937
diff
changeset
|
2188 } |
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
pliden
parents:
17937
diff
changeset
|
2189 |
12233
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2190 size_t G1CollectedHeap::conservative_max_heap_alignment() { |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2191 return HeapRegion::max_region_size(); |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2192 } |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
parents:
12179
diff
changeset
|
2193 |
342 | 2194 void G1CollectedHeap::ref_processing_init() { |
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
2195 // Reference processing in G1 currently works as follows: |
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
2196 // |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2197 // * There are two reference processor instances. One is |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2198 // used to record and process discovered references |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2199 // during concurrent marking; the other is used to |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2200 // record and process references during STW pauses |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2201 // (both full and incremental). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2202 // * Both ref processors need to 'span' the entire heap as |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2203 // the regions in the collection set may be dotted around. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2204 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2205 // * For the concurrent marking ref processor: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2206 // * Reference discovery is enabled at initial marking. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2207 // * Reference discovery is disabled and the discovered |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2208 // references processed etc during remarking. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2209 // * Reference discovery is MT (see below). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2210 // * Reference discovery requires a barrier (see below). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2211 // * Reference processing may or may not be MT |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2212 // (depending on the value of ParallelRefProcEnabled |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2213 // and ParallelGCThreads). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2214 // * A full GC disables reference discovery by the CM |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2215 // ref processor and abandons any entries on it's |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2216 // discovered lists. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2217 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2218 // * For the STW processor: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2219 // * Non MT discovery is enabled at the start of a full GC. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2220 // * Processing and enqueueing during a full GC is non-MT. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2221 // * During a full GC, references are processed after marking. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2222 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2223 // * Discovery (may or may not be MT) is enabled at the start |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2224 // of an incremental evacuation pause. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
2225 // * References are processed near the end of a STW evacuation pause. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2226 // * For both types of GC: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2227 // * Discovery is atomic - i.e. not concurrent. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2228 // * Reference discovery will not need a barrier. |
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
2229 |
342 | 2230 SharedHeap::ref_processing_init(); |
2231 MemRegion mr = reserved_region(); | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
2232 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
2233 // Concurrent Mark ref processor |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
2234 _ref_processor_cm = |
2369
92da084fefc9
6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads
ysr
parents:
2361
diff
changeset
|
2235 new ReferenceProcessor(mr, // span |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2236 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
2237 // mt processing |
4dfb2df418f2
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parents:
3973
diff
changeset
|
2238 (int) ParallelGCThreads, |
4dfb2df418f2
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parents:
3973
diff
changeset
|
2239 // degree of mt processing |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
2240 (ParallelGCThreads > 1) || (ConcGCThreads > 1), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2241 // mt discovery |
4dfb2df418f2
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parents:
3973
diff
changeset
|
2242 (int) MAX2(ParallelGCThreads, ConcGCThreads), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
2243 // degree of mt discovery |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
2244 false, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
2245 // Reference discovery is not atomic |
17976
8e20ef014b08
8043239: G1: Missing post barrier in processing of j.l.ref.Reference objects
brutisso
parents:
17948
diff
changeset
|
2246 &_is_alive_closure_cm); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
2247 // is alive closure |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2248 // (for efficiency/performance) |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2249 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
2250 // STW ref processor |
4dfb2df418f2
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parents:
3973
diff
changeset
|
2251 _ref_processor_stw = |
4dfb2df418f2
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parents:
3973
diff
changeset
|
2252 new ReferenceProcessor(mr, // span |
4dfb2df418f2
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parents:
3973
diff
changeset
|
2253 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
2254 // mt processing |
4dfb2df418f2
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parents:
3973
diff
changeset
|
2255 MAX2((int)ParallelGCThreads, 1), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2256 // degree of mt processing |
4dfb2df418f2
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parents:
3973
diff
changeset
|
2257 (ParallelGCThreads > 1), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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3973
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|
2258 // mt discovery |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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|
2259 MAX2((int)ParallelGCThreads, 1), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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3973
diff
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|
2260 // degree of mt discovery |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
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|
2261 true, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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3973
diff
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|
2262 // Reference discovery is atomic |
17976
8e20ef014b08
8043239: G1: Missing post barrier in processing of j.l.ref.Reference objects
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|
2263 &_is_alive_closure_stw); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
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|
2264 // is alive closure |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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|
2265 // (for efficiency/performance) |
342 | 2266 } |
2267 | |
2268 size_t G1CollectedHeap::capacity() const { | |
2269 return _g1_committed.byte_size(); | |
2270 } | |
2271 | |
6254
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
2272 void G1CollectedHeap::reset_gc_time_stamps(HeapRegion* hr) { |
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|
2273 assert(!hr->continuesHumongous(), "pre-condition"); |
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|
2274 hr->reset_gc_time_stamp(); |
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7114678: G1: various small fixes, code cleanup, and refactoring
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2275 if (hr->startsHumongous()) { |
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|
2276 uint first_index = hr->hrs_index() + 1; |
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
2277 uint last_index = hr->last_hc_index(); |
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|
2278 for (uint i = first_index; i < last_index; i += 1) { |
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|
2279 HeapRegion* chr = region_at(i); |
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|
2280 assert(chr->continuesHumongous(), "sanity"); |
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|
2281 chr->reset_gc_time_stamp(); |
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|
2282 } |
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|
2283 } |
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|
2284 } |
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|
2285 |
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|
2286 #ifndef PRODUCT |
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|
2287 class CheckGCTimeStampsHRClosure : public HeapRegionClosure { |
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|
2288 private: |
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|
2289 unsigned _gc_time_stamp; |
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|
2290 bool _failures; |
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|
2291 |
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|
2292 public: |
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|
2293 CheckGCTimeStampsHRClosure(unsigned gc_time_stamp) : |
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2294 _gc_time_stamp(gc_time_stamp), _failures(false) { } |
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|
2295 |
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
2296 virtual bool doHeapRegion(HeapRegion* hr) { |
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|
2297 unsigned region_gc_time_stamp = hr->get_gc_time_stamp(); |
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|
2298 if (_gc_time_stamp != region_gc_time_stamp) { |
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|
2299 gclog_or_tty->print_cr("Region "HR_FORMAT" has GC time stamp = %d, " |
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|
2300 "expected %d", HR_FORMAT_PARAMS(hr), |
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|
2301 region_gc_time_stamp, _gc_time_stamp); |
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|
2302 _failures = true; |
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|
2303 } |
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|
2304 return false; |
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|
2305 } |
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|
2306 |
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|
2307 bool failures() { return _failures; } |
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|
2308 }; |
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|
2309 |
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
2310 void G1CollectedHeap::check_gc_time_stamps() { |
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
2311 CheckGCTimeStampsHRClosure cl(_gc_time_stamp); |
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|
2312 heap_region_iterate(&cl); |
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
2313 guarantee(!cl.failures(), "all GC time stamps should have been reset"); |
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7114678: G1: various small fixes, code cleanup, and refactoring
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|
2314 } |
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|
2315 #endif // PRODUCT |
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|
2316 |
1705 | 2317 void G1CollectedHeap::iterate_dirty_card_closure(CardTableEntryClosure* cl, |
2318 DirtyCardQueue* into_cset_dcq, | |
2319 bool concurrent, | |
17844
8847586c9037
8016302: Change type of the number of GC workers to unsigned int (2)
vkempik
parents:
17833
diff
changeset
|
2320 uint worker_i) { |
889 | 2321 // Clean cards in the hot card cache |
10246
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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|
2322 G1HotCardCache* hot_card_cache = _cg1r->hot_card_cache(); |
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
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10242
diff
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|
2323 hot_card_cache->drain(worker_i, g1_rem_set(), into_cset_dcq); |
889 | 2324 |
342 | 2325 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); |
2326 int n_completed_buffers = 0; | |
1705 | 2327 while (dcqs.apply_closure_to_completed_buffer(cl, worker_i, 0, true)) { |
342 | 2328 n_completed_buffers++; |
2329 } | |
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
|
2330 g1_policy()->phase_times()->record_update_rs_processed_buffers(worker_i, n_completed_buffers); |
342 | 2331 dcqs.clear_n_completed_buffers(); |
2332 assert(!dcqs.completed_buffers_exist_dirty(), "Completed buffers exist!"); | |
2333 } | |
2334 | |
2335 | |
2336 // Computes the sum of the storage used by the various regions. | |
2337 | |
2338 size_t G1CollectedHeap::used() const { | |
862
36b5611220a7
6863216: Clean up debugging debris inadvertently pushed with 6700789
ysr
parents:
861
diff
changeset
|
2339 assert(Heap_lock->owner() != NULL, |
36b5611220a7
6863216: Clean up debugging debris inadvertently pushed with 6700789
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parents:
861
diff
changeset
|
2340 "Should be owned on this thread's behalf."); |
342 | 2341 size_t result = _summary_bytes_used; |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
2342 // Read only once in case it is set to NULL concurrently |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
2343 HeapRegion* hr = _mutator_alloc_region.get(); |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
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|
2344 if (hr != NULL) |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
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parents:
838
diff
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|
2345 result += hr->used(); |
342 | 2346 return result; |
2347 } | |
2348 | |
846
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
2349 size_t G1CollectedHeap::used_unlocked() const { |
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
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|
2350 size_t result = _summary_bytes_used; |
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
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|
2351 return result; |
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
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845
diff
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|
2352 } |
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
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845
diff
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|
2353 |
342 | 2354 class SumUsedClosure: public HeapRegionClosure { |
2355 size_t _used; | |
2356 public: | |
2357 SumUsedClosure() : _used(0) {} | |
2358 bool doHeapRegion(HeapRegion* r) { | |
2359 if (!r->continuesHumongous()) { | |
2360 _used += r->used(); | |
2361 } | |
2362 return false; | |
2363 } | |
2364 size_t result() { return _used; } | |
2365 }; | |
2366 | |
2367 size_t G1CollectedHeap::recalculate_used() const { | |
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
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17756
diff
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|
2368 double recalculate_used_start = os::elapsedTime(); |
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
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17756
diff
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|
2369 |
342 | 2370 SumUsedClosure blk; |
3766 | 2371 heap_region_iterate(&blk); |
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
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17756
diff
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|
2372 |
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
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17756
diff
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|
2373 g1_policy()->phase_times()->record_evac_fail_recalc_used_time((os::elapsedTime() - recalculate_used_start) * 1000.0); |
342 | 2374 return blk.result(); |
2375 } | |
2376 | |
2377 size_t G1CollectedHeap::unsafe_max_alloc() { | |
2152 | 2378 if (free_regions() > 0) return HeapRegion::GrainBytes; |
342 | 2379 // otherwise, is there space in the current allocation region? |
2380 | |
2381 // We need to store the current allocation region in a local variable | |
2382 // here. The problem is that this method doesn't take any locks and | |
2383 // there may be other threads which overwrite the current allocation | |
2384 // region field. attempt_allocation(), for example, sets it to NULL | |
2385 // and this can happen *after* the NULL check here but before the call | |
2386 // to free(), resulting in a SIGSEGV. Note that this doesn't appear | |
2387 // to be a problem in the optimized build, since the two loads of the | |
2388 // current allocation region field are optimized away. | |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
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2432
diff
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|
2389 HeapRegion* hr = _mutator_alloc_region.get(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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diff
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|
2390 if (hr == NULL) { |
342 | 2391 return 0; |
2392 } | |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
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|
2393 return hr->free(); |
342 | 2394 } |
2395 | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
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1611
diff
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|
2396 bool G1CollectedHeap::should_do_concurrent_full_gc(GCCause::Cause cause) { |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
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4875
diff
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|
2397 switch (cause) { |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
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4875
diff
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|
2398 case GCCause::_gc_locker: return GCLockerInvokesConcurrent; |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
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|
2399 case GCCause::_java_lang_system_gc: return ExplicitGCInvokesConcurrent; |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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4875
diff
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|
2400 case GCCause::_g1_humongous_allocation: return true; |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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4875
diff
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|
2401 default: return false; |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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4875
diff
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|
2402 } |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
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1611
diff
changeset
|
2403 } |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
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1611
diff
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|
2404 |
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
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2433
diff
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|
2405 #ifndef PRODUCT |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
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|
2406 void G1CollectedHeap::allocate_dummy_regions() { |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2407 // Let's fill up most of the region |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2408 size_t word_size = HeapRegion::GrainWords - 1024; |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2409 // And as a result the region we'll allocate will be humongous. |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2410 guarantee(isHumongous(word_size), "sanity"); |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2411 |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2412 for (uintx i = 0; i < G1DummyRegionsPerGC; ++i) { |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2413 // Let's use the existing mechanism for the allocation |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2414 HeapWord* dummy_obj = humongous_obj_allocate(word_size); |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2415 if (dummy_obj != NULL) { |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2416 MemRegion mr(dummy_obj, word_size); |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2417 CollectedHeap::fill_with_object(mr); |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
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|
2418 } else { |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2419 // If we can't allocate once, we probably cannot allocate |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2420 // again. Let's get out of the loop. |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2421 break; |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2422 } |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2423 } |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2424 } |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2425 #endif // !PRODUCT |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
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|
2426 |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2427 void G1CollectedHeap::increment_old_marking_cycles_started() { |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
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|
2428 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
|
2429 _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
|
2430 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
|
2431 _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
|
2432 |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2433 _old_marking_cycles_started++; |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2434 } |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2435 |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2436 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
|
2437 MonitorLockerEx x(FullGCCount_lock, Mutex::_no_safepoint_check_flag); |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2438 |
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2439 // 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
|
2440 // 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
|
2441 // 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
|
2442 // assert here. |
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2443 |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2444 // 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
|
2445 // 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
|
2446 // interrupt a concurrent cycle), the number of full collections |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2447 // 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
|
2448 // 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
|
2449 // behind the number of full collections started. |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2450 |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2451 // 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
|
2452 assert(concurrent || |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2453 (_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
|
2454 (_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
|
2455 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
|
2456 "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
|
2457 _old_marking_cycles_started, _old_marking_cycles_completed)); |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2458 |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2459 // 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
|
2460 assert(!concurrent || |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2461 (_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
|
2462 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
|
2463 "_old_marking_cycles_started = %u " |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2464 "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
|
2465 _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
|
2466 |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2467 _old_marking_cycles_completed += 1; |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2468 |
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2469 // 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
|
2470 // we wake up any waiters (especially when ExplicitInvokesConcurrent |
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2471 // is set) so that if a waiter requests another System.gc() it doesn't |
10405 | 2472 // 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
|
2473 if (concurrent) { |
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2474 _cmThread->clear_in_progress(); |
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2475 } |
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2476 |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2477 // 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
|
2478 // System.gc() with (with ExplicitGCInvokesConcurrent set or not) |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2479 // 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
|
2480 // waiting in VM_G1IncCollectionPause::doit_epilogue(). |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2481 FullGCCount_lock->notify_all(); |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2482 } |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2483 |
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
2484 void G1CollectedHeap::register_concurrent_cycle_start(const Ticks& start_time) { |
10405 | 2485 _concurrent_cycle_started = true; |
2486 _gc_timer_cm->register_gc_start(start_time); | |
2487 | |
2488 _gc_tracer_cm->report_gc_start(gc_cause(), _gc_timer_cm->gc_start()); | |
2489 trace_heap_before_gc(_gc_tracer_cm); | |
2490 } | |
2491 | |
2492 void G1CollectedHeap::register_concurrent_cycle_end() { | |
2493 if (_concurrent_cycle_started) { | |
2494 if (_cm->has_aborted()) { | |
2495 _gc_tracer_cm->report_concurrent_mode_failure(); | |
2496 } | |
12179
f175e3678be2
8020692: TestGCEventMixed.java failed because of timestamp in event after end event
ehelin
parents:
12116
diff
changeset
|
2497 |
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
2498 _gc_timer_cm->register_gc_end(); |
10405 | 2499 _gc_tracer_cm->report_gc_end(_gc_timer_cm->gc_end(), _gc_timer_cm->time_partitions()); |
2500 | |
2501 _concurrent_cycle_started = false; | |
2502 } | |
2503 } | |
2504 | |
2505 void G1CollectedHeap::trace_heap_after_concurrent_cycle() { | |
2506 if (_concurrent_cycle_started) { | |
2507 trace_heap_after_gc(_gc_tracer_cm); | |
2508 } | |
2509 } | |
2510 | |
2511 G1YCType G1CollectedHeap::yc_type() { | |
2512 bool is_young = g1_policy()->gcs_are_young(); | |
2513 bool is_initial_mark = g1_policy()->during_initial_mark_pause(); | |
2514 bool is_during_mark = mark_in_progress(); | |
2515 | |
2516 if (is_initial_mark) { | |
2517 return InitialMark; | |
2518 } else if (is_during_mark) { | |
2519 return DuringMark; | |
2520 } else if (is_young) { | |
2521 return Normal; | |
2522 } else { | |
2523 return Mixed; | |
2524 } | |
2525 } | |
2526 | |
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2527 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
|
2528 assert_heap_not_locked(); |
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2529 |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2530 unsigned int gc_count_before; |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2531 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
|
2532 bool retry_gc; |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2533 |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2534 do { |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2535 retry_gc = false; |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2536 |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2537 { |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2538 MutexLocker ml(Heap_lock); |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2539 |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2540 // 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
|
2541 gc_count_before = total_collections(); |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2542 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
|
2543 } |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2544 |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2545 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
|
2546 // 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
|
2547 // 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
|
2548 // we are not requesting a post-GC allocation. |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2549 VM_G1IncCollectionPause op(gc_count_before, |
1973 | 2550 0, /* word_size */ |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2551 true, /* should_initiate_conc_mark */ |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2552 g1_policy()->max_pause_time_ms(), |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2553 cause); |
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2554 |
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2555 VMThread::execute(&op); |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2556 if (!op.pause_succeeded()) { |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2557 if (old_marking_count_before == _old_marking_cycles_started) { |
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2558 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
|
2559 } else { |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2560 // 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
|
2561 // 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
|
2562 // 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
|
2563 } |
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2564 |
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2565 if (retry_gc) { |
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2566 if (GC_locker::is_active_and_needs_gc()) { |
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2567 GC_locker::stall_until_clear(); |
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2568 } |
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2569 } |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2570 } |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2571 } else { |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2572 if (cause == GCCause::_gc_locker |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2573 DEBUG_ONLY(|| cause == GCCause::_scavenge_alot)) { |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2574 |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2575 // Schedule a standard evacuation pause. We're setting word_size |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2576 // to 0 which means that we are not requesting a post-GC allocation. |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2577 VM_G1IncCollectionPause op(gc_count_before, |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2578 0, /* word_size */ |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2579 false, /* should_initiate_conc_mark */ |
caa4652b4414
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2580 g1_policy()->max_pause_time_ms(), |
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2581 cause); |
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2582 VMThread::execute(&op); |
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2583 } else { |
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2584 // Schedule a Full GC. |
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2585 VM_G1CollectFull op(gc_count_before, old_marking_count_before, cause); |
4910
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2586 VMThread::execute(&op); |
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2587 } |
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2588 } |
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2589 } while (retry_gc); |
342 | 2590 } |
2591 | |
2592 bool G1CollectedHeap::is_in(const void* p) const { | |
4708 | 2593 if (_g1_committed.contains(p)) { |
2594 // Given that we know that p is in the committed space, | |
2595 // heap_region_containing_raw() should successfully | |
2596 // return the containing region. | |
2597 HeapRegion* hr = heap_region_containing_raw(p); | |
342 | 2598 return hr->is_in(p); |
2599 } else { | |
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2600 return false; |
342 | 2601 } |
2602 } | |
2603 | |
2604 // Iteration functions. | |
2605 | |
2606 // Iterates an OopClosure over all ref-containing fields of objects | |
2607 // within a HeapRegion. | |
2608 | |
2609 class IterateOopClosureRegionClosure: public HeapRegionClosure { | |
2610 MemRegion _mr; | |
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2611 ExtendedOopClosure* _cl; |
342 | 2612 public: |
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2613 IterateOopClosureRegionClosure(MemRegion mr, ExtendedOopClosure* cl) |
342 | 2614 : _mr(mr), _cl(cl) {} |
2615 bool doHeapRegion(HeapRegion* r) { | |
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2616 if (!r->continuesHumongous()) { |
342 | 2617 r->oop_iterate(_cl); |
2618 } | |
2619 return false; | |
2620 } | |
2621 }; | |
2622 | |
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2623 void G1CollectedHeap::oop_iterate(ExtendedOopClosure* cl) { |
342 | 2624 IterateOopClosureRegionClosure blk(_g1_committed, cl); |
3766 | 2625 heap_region_iterate(&blk); |
6725
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2626 } |
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2627 |
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2628 void G1CollectedHeap::oop_iterate(MemRegion mr, ExtendedOopClosure* cl) { |
342 | 2629 IterateOopClosureRegionClosure blk(mr, cl); |
3766 | 2630 heap_region_iterate(&blk); |
342 | 2631 } |
2632 | |
2633 // Iterates an ObjectClosure over all objects within a HeapRegion. | |
2634 | |
2635 class IterateObjectClosureRegionClosure: public HeapRegionClosure { | |
2636 ObjectClosure* _cl; | |
2637 public: | |
2638 IterateObjectClosureRegionClosure(ObjectClosure* cl) : _cl(cl) {} | |
2639 bool doHeapRegion(HeapRegion* r) { | |
2640 if (! r->continuesHumongous()) { | |
2641 r->object_iterate(_cl); | |
2642 } | |
2643 return false; | |
2644 } | |
2645 }; | |
2646 | |
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2647 void G1CollectedHeap::object_iterate(ObjectClosure* cl) { |
342 | 2648 IterateObjectClosureRegionClosure blk(cl); |
3766 | 2649 heap_region_iterate(&blk); |
342 | 2650 } |
2651 | |
2652 // Calls a SpaceClosure on a HeapRegion. | |
2653 | |
2654 class SpaceClosureRegionClosure: public HeapRegionClosure { | |
2655 SpaceClosure* _cl; | |
2656 public: | |
2657 SpaceClosureRegionClosure(SpaceClosure* cl) : _cl(cl) {} | |
2658 bool doHeapRegion(HeapRegion* r) { | |
2659 _cl->do_space(r); | |
2660 return false; | |
2661 } | |
2662 }; | |
2663 | |
2664 void G1CollectedHeap::space_iterate(SpaceClosure* cl) { | |
2665 SpaceClosureRegionClosure blk(cl); | |
3766 | 2666 heap_region_iterate(&blk); |
342 | 2667 } |
2668 | |
3766 | 2669 void G1CollectedHeap::heap_region_iterate(HeapRegionClosure* cl) const { |
2670 _hrs.iterate(cl); | |
342 | 2671 } |
2672 | |
2673 void | |
2674 G1CollectedHeap::heap_region_par_iterate_chunked(HeapRegionClosure* cl, | |
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2675 uint worker_id, |
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2676 uint no_of_par_workers, |
342 | 2677 jint claim_value) { |
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2678 const uint regions = n_regions(); |
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2679 const uint max_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
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2680 no_of_par_workers : |
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2681 1); |
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2682 assert(UseDynamicNumberOfGCThreads || |
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2683 no_of_par_workers == workers()->total_workers(), |
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2684 "Non dynamic should use fixed number of workers"); |
355 | 2685 // try to spread out the starting points of the workers |
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2686 const HeapRegion* start_hr = |
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2687 start_region_for_worker(worker_id, no_of_par_workers); |
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2688 const uint start_index = start_hr->hrs_index(); |
355 | 2689 |
2690 // each worker will actually look at all regions | |
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2691 for (uint count = 0; count < regions; ++count) { |
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2692 const uint index = (start_index + count) % regions; |
355 | 2693 assert(0 <= index && index < regions, "sanity"); |
2694 HeapRegion* r = region_at(index); | |
2695 // we'll ignore "continues humongous" regions (we'll process them | |
2696 // when we come across their corresponding "start humongous" | |
2697 // region) and regions already claimed | |
2698 if (r->claim_value() == claim_value || r->continuesHumongous()) { | |
2699 continue; | |
2700 } | |
2701 // OK, try to claim it | |
342 | 2702 if (r->claimHeapRegion(claim_value)) { |
355 | 2703 // success! |
2704 assert(!r->continuesHumongous(), "sanity"); | |
2705 if (r->startsHumongous()) { | |
2706 // If the region is "starts humongous" we'll iterate over its | |
2707 // "continues humongous" first; in fact we'll do them | |
2708 // first. The order is important. In on case, calling the | |
2709 // closure on the "starts humongous" region might de-allocate | |
2710 // and clear all its "continues humongous" regions and, as a | |
2711 // result, we might end up processing them twice. So, we'll do | |
2712 // them first (notice: most closures will ignore them anyway) and | |
2713 // then we'll do the "starts humongous" region. | |
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2714 for (uint ch_index = index + 1; ch_index < regions; ++ch_index) { |
355 | 2715 HeapRegion* chr = region_at(ch_index); |
2716 | |
2717 // if the region has already been claimed or it's not | |
2718 // "continues humongous" we're done | |
2719 if (chr->claim_value() == claim_value || | |
2720 !chr->continuesHumongous()) { | |
2721 break; | |
2722 } | |
2723 | |
10405 | 2724 // No one should have claimed it directly. We can given |
355 | 2725 // that we claimed its "starts humongous" region. |
2726 assert(chr->claim_value() != claim_value, "sanity"); | |
2727 assert(chr->humongous_start_region() == r, "sanity"); | |
2728 | |
2729 if (chr->claimHeapRegion(claim_value)) { | |
10405 | 2730 // we should always be able to claim it; no one else should |
355 | 2731 // be trying to claim this region |
2732 | |
2733 bool res2 = cl->doHeapRegion(chr); | |
2734 assert(!res2, "Should not abort"); | |
2735 | |
2736 // Right now, this holds (i.e., no closure that actually | |
2737 // does something with "continues humongous" regions | |
2738 // clears them). We might have to weaken it in the future, | |
2739 // but let's leave these two asserts here for extra safety. | |
2740 assert(chr->continuesHumongous(), "should still be the case"); | |
2741 assert(chr->humongous_start_region() == r, "sanity"); | |
2742 } else { | |
2743 guarantee(false, "we should not reach here"); | |
2744 } | |
2745 } | |
2746 } | |
2747 | |
2748 assert(!r->continuesHumongous(), "sanity"); | |
2749 bool res = cl->doHeapRegion(r); | |
2750 assert(!res, "Should not abort"); | |
2751 } | |
2752 } | |
2753 } | |
2754 | |
390 | 2755 class ResetClaimValuesClosure: public HeapRegionClosure { |
2756 public: | |
2757 bool doHeapRegion(HeapRegion* r) { | |
2758 r->set_claim_value(HeapRegion::InitialClaimValue); | |
2759 return false; | |
2760 } | |
2761 }; | |
2762 | |
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2763 void G1CollectedHeap::reset_heap_region_claim_values() { |
390 | 2764 ResetClaimValuesClosure blk; |
2765 heap_region_iterate(&blk); | |
2766 } | |
2767 | |
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2768 void G1CollectedHeap::reset_cset_heap_region_claim_values() { |
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2769 ResetClaimValuesClosure blk; |
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2770 collection_set_iterate(&blk); |
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2771 } |
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2772 |
355 | 2773 #ifdef ASSERT |
2774 // This checks whether all regions in the heap have the correct claim | |
2775 // value. I also piggy-backed on this a check to ensure that the | |
2776 // humongous_start_region() information on "continues humongous" | |
2777 // regions is correct. | |
2778 | |
2779 class CheckClaimValuesClosure : public HeapRegionClosure { | |
2780 private: | |
2781 jint _claim_value; | |
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2782 uint _failures; |
355 | 2783 HeapRegion* _sh_region; |
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2784 |
355 | 2785 public: |
2786 CheckClaimValuesClosure(jint claim_value) : | |
2787 _claim_value(claim_value), _failures(0), _sh_region(NULL) { } | |
2788 bool doHeapRegion(HeapRegion* r) { | |
2789 if (r->claim_value() != _claim_value) { | |
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2790 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
355 | 2791 "claim value = %d, should be %d", |
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2792 HR_FORMAT_PARAMS(r), |
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2793 r->claim_value(), _claim_value); |
355 | 2794 ++_failures; |
2795 } | |
2796 if (!r->isHumongous()) { | |
2797 _sh_region = NULL; | |
2798 } else if (r->startsHumongous()) { | |
2799 _sh_region = r; | |
2800 } else if (r->continuesHumongous()) { | |
2801 if (r->humongous_start_region() != _sh_region) { | |
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2802 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
355 | 2803 "HS = "PTR_FORMAT", should be "PTR_FORMAT, |
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2804 HR_FORMAT_PARAMS(r), |
355 | 2805 r->humongous_start_region(), |
2806 _sh_region); | |
2807 ++_failures; | |
342 | 2808 } |
2809 } | |
355 | 2810 return false; |
2811 } | |
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2812 uint failures() { return _failures; } |
355 | 2813 }; |
2814 | |
2815 bool G1CollectedHeap::check_heap_region_claim_values(jint claim_value) { | |
2816 CheckClaimValuesClosure cl(claim_value); | |
2817 heap_region_iterate(&cl); | |
2818 return cl.failures() == 0; | |
2819 } | |
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2820 |
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2821 class CheckClaimValuesInCSetHRClosure: public HeapRegionClosure { |
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2822 private: |
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2823 jint _claim_value; |
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2824 uint _failures; |
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2825 |
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2826 public: |
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2827 CheckClaimValuesInCSetHRClosure(jint claim_value) : |
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2828 _claim_value(claim_value), _failures(0) { } |
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2829 |
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2830 uint failures() { return _failures; } |
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2831 |
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2832 bool doHeapRegion(HeapRegion* hr) { |
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2833 assert(hr->in_collection_set(), "how?"); |
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2834 assert(!hr->isHumongous(), "H-region in CSet"); |
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2835 if (hr->claim_value() != _claim_value) { |
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2836 gclog_or_tty->print_cr("CSet Region " HR_FORMAT ", " |
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2837 "claim value = %d, should be %d", |
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2838 HR_FORMAT_PARAMS(hr), |
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2839 hr->claim_value(), _claim_value); |
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2840 _failures += 1; |
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|
2841 } |
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2842 return false; |
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|
2843 } |
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|
2844 }; |
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2845 |
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2846 bool G1CollectedHeap::check_cset_heap_region_claim_values(jint claim_value) { |
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2847 CheckClaimValuesInCSetHRClosure cl(claim_value); |
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2848 collection_set_iterate(&cl); |
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2849 return cl.failures() == 0; |
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changeset
|
2850 } |
355 | 2851 #endif // ASSERT |
342 | 2852 |
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2853 // 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
|
2854 // 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
|
2855 void G1CollectedHeap::clear_cset_start_regions() { |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2856 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
|
2857 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
|
2858 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2859 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
|
2860 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
|
2861 _worker_cset_start_region[i] = NULL; |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2862 _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
|
2863 } |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2864 } |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2865 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2866 // 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
|
2867 // 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
|
2868 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
|
2869 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
|
2870 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2871 HeapRegion* result = NULL; |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2872 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
|
2873 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2874 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
|
2875 // 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
|
2876 // 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
|
2877 // 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
|
2878 // (when the collection set is empty). |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2879 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
|
2880 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
|
2881 return result; |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2882 } |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2883 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2884 // 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
|
2885 // 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
|
2886 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2887 // 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
|
2888 // 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
|
2889 // avoid contention. |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2890 // If we have: |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2891 // n collection set regions |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2892 // p threads |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2893 // 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
|
2894 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2895 result = g1_policy()->collection_set(); |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2896 if (G1CollectedHeap::use_parallel_gc_threads()) { |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2897 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
|
2898 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
|
2899 assert(UseDynamicNumberOfGCThreads || |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2900 active_workers == workers()->total_workers(), |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2901 "Unless dynamic should use total workers"); |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2902 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2903 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
|
2904 uint start_ind = 0; |
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2905 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2906 if (worker_i > 0 && |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2907 _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
|
2908 // Previous workers starting region is valid |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2909 // so let's iterate from there |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2910 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
|
2911 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
|
2912 } |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2913 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2914 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
|
2915 result = result->next_in_collection_set(); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2916 } |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2917 } |
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2918 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2919 // 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
|
2920 // (when the collection set is empty). |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2921 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
|
2922 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
|
2923 "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
|
2924 _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
|
2925 OrderAccess::storestore(); |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2926 _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
|
2927 return result; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2928 } |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2929 |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2930 HeapRegion* G1CollectedHeap::start_region_for_worker(uint worker_i, |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2931 uint no_of_par_workers) { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2932 uint worker_num = |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2933 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
|
2934 assert(UseDynamicNumberOfGCThreads || |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2935 no_of_par_workers == workers()->total_workers(), |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2936 "Non dynamic should use fixed number of workers"); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2937 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
|
2938 return region_at(start_index); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2939 } |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2940 |
342 | 2941 void G1CollectedHeap::collection_set_iterate(HeapRegionClosure* cl) { |
2942 HeapRegion* r = g1_policy()->collection_set(); | |
2943 while (r != NULL) { | |
2944 HeapRegion* next = r->next_in_collection_set(); | |
2945 if (cl->doHeapRegion(r)) { | |
2946 cl->incomplete(); | |
2947 return; | |
2948 } | |
2949 r = next; | |
2950 } | |
2951 } | |
2952 | |
2953 void G1CollectedHeap::collection_set_iterate_from(HeapRegion* r, | |
2954 HeapRegionClosure *cl) { | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2955 if (r == NULL) { |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2956 // 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
|
2957 return; |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2958 } |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2959 |
342 | 2960 assert(r->in_collection_set(), |
2961 "Start region must be a member of the collection set."); | |
2962 HeapRegion* cur = r; | |
2963 while (cur != NULL) { | |
2964 HeapRegion* next = cur->next_in_collection_set(); | |
2965 if (cl->doHeapRegion(cur) && false) { | |
2966 cl->incomplete(); | |
2967 return; | |
2968 } | |
2969 cur = next; | |
2970 } | |
2971 cur = g1_policy()->collection_set(); | |
2972 while (cur != r) { | |
2973 HeapRegion* next = cur->next_in_collection_set(); | |
2974 if (cl->doHeapRegion(cur) && false) { | |
2975 cl->incomplete(); | |
2976 return; | |
2977 } | |
2978 cur = next; | |
2979 } | |
2980 } | |
2981 | |
2982 CompactibleSpace* G1CollectedHeap::first_compactible_space() { | |
3766 | 2983 return n_regions() > 0 ? region_at(0) : NULL; |
342 | 2984 } |
2985 | |
2986 | |
2987 Space* G1CollectedHeap::space_containing(const void* addr) const { | |
2988 Space* res = heap_region_containing(addr); | |
2989 return res; | |
2990 } | |
2991 | |
2992 HeapWord* G1CollectedHeap::block_start(const void* addr) const { | |
2993 Space* sp = space_containing(addr); | |
2994 if (sp != NULL) { | |
2995 return sp->block_start(addr); | |
2996 } | |
2997 return NULL; | |
2998 } | |
2999 | |
3000 size_t G1CollectedHeap::block_size(const HeapWord* addr) const { | |
3001 Space* sp = space_containing(addr); | |
3002 assert(sp != NULL, "block_size of address outside of heap"); | |
3003 return sp->block_size(addr); | |
3004 } | |
3005 | |
3006 bool G1CollectedHeap::block_is_obj(const HeapWord* addr) const { | |
3007 Space* sp = space_containing(addr); | |
3008 return sp->block_is_obj(addr); | |
3009 } | |
3010 | |
3011 bool G1CollectedHeap::supports_tlab_allocation() const { | |
3012 return true; | |
3013 } | |
3014 | |
3015 size_t G1CollectedHeap::tlab_capacity(Thread* ignored) const { | |
17727 | 3016 return (_g1_policy->young_list_target_length() - young_list()->survivor_length()) * HeapRegion::GrainBytes; |
3017 } | |
3018 | |
3019 size_t G1CollectedHeap::tlab_used(Thread* ignored) const { | |
3020 return young_list()->eden_used_bytes(); | |
3021 } | |
3022 | |
3023 // For G1 TLABs should not contain humongous objects, so the maximum TLAB size | |
3024 // must be smaller than the humongous object limit. | |
3025 size_t G1CollectedHeap::max_tlab_size() const { | |
3026 return align_size_down(_humongous_object_threshold_in_words - 1, MinObjAlignment); | |
342 | 3027 } |
3028 | |
3029 size_t G1CollectedHeap::unsafe_max_tlab_alloc(Thread* ignored) const { | |
3030 // Return the remaining space in the cur alloc region, but not less than | |
3031 // the min TLAB size. | |
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
3032 |
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
3033 // Also, this value can be at most the humongous object threshold, |
10405 | 3034 // since we can't allow tlabs to grow big enough to accommodate |
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
3035 // humongous objects. |
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
3036 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3037 HeapRegion* hr = _mutator_alloc_region.get(); |
17727 | 3038 size_t max_tlab = max_tlab_size() * wordSize; |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3039 if (hr == NULL) { |
17727 | 3040 return max_tlab; |
342 | 3041 } else { |
17727 | 3042 return MIN2(MAX2(hr->free(), (size_t) MinTLABSize), max_tlab); |
342 | 3043 } |
3044 } | |
3045 | |
3046 size_t G1CollectedHeap::max_capacity() const { | |
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
3047 return _g1_reserved.byte_size(); |
342 | 3048 } |
3049 | |
3050 jlong G1CollectedHeap::millis_since_last_gc() { | |
3051 // assert(false, "NYI"); | |
3052 return 0; | |
3053 } | |
3054 | |
3055 void G1CollectedHeap::prepare_for_verify() { | |
3056 if (SafepointSynchronize::is_at_safepoint() || ! UseTLAB) { | |
3057 ensure_parsability(false); | |
3058 } | |
3059 g1_rem_set()->prepare_for_verify(); | |
3060 } | |
3061 | |
6254
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3062 bool G1CollectedHeap::allocated_since_marking(oop obj, HeapRegion* hr, |
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3063 VerifyOption vo) { |
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3064 switch (vo) { |
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3065 case VerifyOption_G1UsePrevMarking: |
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3066 return hr->obj_allocated_since_prev_marking(obj); |
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3067 case VerifyOption_G1UseNextMarking: |
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3068 return hr->obj_allocated_since_next_marking(obj); |
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3069 case VerifyOption_G1UseMarkWord: |
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3070 return false; |
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3071 default: |
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3072 ShouldNotReachHere(); |
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3073 } |
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3074 return false; // keep some compilers happy |
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3075 } |
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3076 |
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3077 HeapWord* G1CollectedHeap::top_at_mark_start(HeapRegion* hr, VerifyOption vo) { |
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3078 switch (vo) { |
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3079 case VerifyOption_G1UsePrevMarking: return hr->prev_top_at_mark_start(); |
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3080 case VerifyOption_G1UseNextMarking: return hr->next_top_at_mark_start(); |
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3081 case VerifyOption_G1UseMarkWord: return NULL; |
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3082 default: ShouldNotReachHere(); |
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3083 } |
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3084 return NULL; // keep some compilers happy |
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3085 } |
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3086 |
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3087 bool G1CollectedHeap::is_marked(oop obj, VerifyOption vo) { |
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3088 switch (vo) { |
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3089 case VerifyOption_G1UsePrevMarking: return isMarkedPrev(obj); |
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3090 case VerifyOption_G1UseNextMarking: return isMarkedNext(obj); |
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3091 case VerifyOption_G1UseMarkWord: return obj->is_gc_marked(); |
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3092 default: ShouldNotReachHere(); |
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3093 } |
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3094 return false; // keep some compilers happy |
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3095 } |
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3096 |
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3097 const char* G1CollectedHeap::top_at_mark_start_str(VerifyOption vo) { |
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3098 switch (vo) { |
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3099 case VerifyOption_G1UsePrevMarking: return "PTAMS"; |
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3100 case VerifyOption_G1UseNextMarking: return "NTAMS"; |
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3101 case VerifyOption_G1UseMarkWord: return "NONE"; |
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3102 default: ShouldNotReachHere(); |
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3103 } |
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3104 return NULL; // keep some compilers happy |
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3105 } |
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3106 |
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3107 class VerifyRootsClosure: public OopClosure { |
12080 | 3108 private: |
3109 G1CollectedHeap* _g1h; | |
3110 VerifyOption _vo; | |
3111 bool _failures; | |
3112 public: | |
3113 // _vo == UsePrevMarking -> use "prev" marking information, | |
3114 // _vo == UseNextMarking -> use "next" marking information, | |
3115 // _vo == UseMarkWord -> use mark word from object header. | |
3116 VerifyRootsClosure(VerifyOption vo) : | |
3117 _g1h(G1CollectedHeap::heap()), | |
3118 _vo(vo), | |
3119 _failures(false) { } | |
3120 | |
3121 bool failures() { return _failures; } | |
3122 | |
3123 template <class T> void do_oop_nv(T* p) { | |
3124 T heap_oop = oopDesc::load_heap_oop(p); | |
3125 if (!oopDesc::is_null(heap_oop)) { | |
3126 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
3127 if (_g1h->is_obj_dead_cond(obj, _vo)) { | |
3128 gclog_or_tty->print_cr("Root location "PTR_FORMAT" " | |
3129 "points to dead obj "PTR_FORMAT, p, (void*) obj); | |
3130 if (_vo == VerifyOption_G1UseMarkWord) { | |
3131 gclog_or_tty->print_cr(" Mark word: "PTR_FORMAT, (void*)(obj->mark())); | |
3132 } | |
3133 obj->print_on(gclog_or_tty); | |
3134 _failures = true; | |
3135 } | |
3136 } | |
3137 } | |
3138 | |
3139 void do_oop(oop* p) { do_oop_nv(p); } | |
3140 void do_oop(narrowOop* p) { do_oop_nv(p); } | |
3141 }; | |
3142 | |
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3143 class G1VerifyCodeRootOopClosure: public OopClosure { |
12080 | 3144 G1CollectedHeap* _g1h; |
3145 OopClosure* _root_cl; | |
3146 nmethod* _nm; | |
3147 VerifyOption _vo; | |
3148 bool _failures; | |
3149 | |
3150 template <class T> void do_oop_work(T* p) { | |
3151 // First verify that this root is live | |
3152 _root_cl->do_oop(p); | |
3153 | |
3154 if (!G1VerifyHeapRegionCodeRoots) { | |
3155 // We're not verifying the code roots attached to heap region. | |
3156 return; | |
3157 } | |
3158 | |
3159 // Don't check the code roots during marking verification in a full GC | |
3160 if (_vo == VerifyOption_G1UseMarkWord) { | |
3161 return; | |
3162 } | |
3163 | |
3164 // Now verify that the current nmethod (which contains p) is | |
3165 // in the code root list of the heap region containing the | |
3166 // object referenced by p. | |
3167 | |
3168 T heap_oop = oopDesc::load_heap_oop(p); | |
3169 if (!oopDesc::is_null(heap_oop)) { | |
3170 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
3171 | |
3172 // Now fetch the region containing the object | |
3173 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
3174 HeapRegionRemSet* hrrs = hr->rem_set(); | |
3175 // Verify that the strong code root list for this region | |
3176 // contains the nmethod | |
3177 if (!hrrs->strong_code_roots_list_contains(_nm)) { | |
3178 gclog_or_tty->print_cr("Code root location "PTR_FORMAT" " | |
3179 "from nmethod "PTR_FORMAT" not in strong " | |
3180 "code roots for region ["PTR_FORMAT","PTR_FORMAT")", | |
3181 p, _nm, hr->bottom(), hr->end()); | |
3182 _failures = true; | |
3183 } | |
3184 } | |
3185 } | |
3186 | |
3187 public: | |
3188 G1VerifyCodeRootOopClosure(G1CollectedHeap* g1h, OopClosure* root_cl, VerifyOption vo): | |
3189 _g1h(g1h), _root_cl(root_cl), _vo(vo), _nm(NULL), _failures(false) {} | |
3190 | |
3191 void do_oop(oop* p) { do_oop_work(p); } | |
3192 void do_oop(narrowOop* p) { do_oop_work(p); } | |
3193 | |
3194 void set_nmethod(nmethod* nm) { _nm = nm; } | |
3195 bool failures() { return _failures; } | |
3196 }; | |
3197 | |
3198 class G1VerifyCodeRootBlobClosure: public CodeBlobClosure { | |
3199 G1VerifyCodeRootOopClosure* _oop_cl; | |
3200 | |
3201 public: | |
3202 G1VerifyCodeRootBlobClosure(G1VerifyCodeRootOopClosure* oop_cl): | |
3203 _oop_cl(oop_cl) {} | |
3204 | |
3205 void do_code_blob(CodeBlob* cb) { | |
3206 nmethod* nm = cb->as_nmethod_or_null(); | |
3207 if (nm != NULL) { | |
3208 _oop_cl->set_nmethod(nm); | |
3209 nm->oops_do(_oop_cl); | |
3210 } | |
3211 } | |
3212 }; | |
3213 | |
3214 class YoungRefCounterClosure : public OopClosure { | |
3215 G1CollectedHeap* _g1h; | |
3216 int _count; | |
3217 public: | |
3218 YoungRefCounterClosure(G1CollectedHeap* g1h) : _g1h(g1h), _count(0) {} | |
3219 void do_oop(oop* p) { if (_g1h->is_in_young(*p)) { _count++; } } | |
3220 void do_oop(narrowOop* p) { ShouldNotReachHere(); } | |
3221 | |
3222 int count() { return _count; } | |
3223 void reset_count() { _count = 0; }; | |
3224 }; | |
3225 | |
3226 class VerifyKlassClosure: public KlassClosure { | |
3227 YoungRefCounterClosure _young_ref_counter_closure; | |
3228 OopClosure *_oop_closure; | |
3229 public: | |
3230 VerifyKlassClosure(G1CollectedHeap* g1h, OopClosure* cl) : _young_ref_counter_closure(g1h), _oop_closure(cl) {} | |
3231 void do_klass(Klass* k) { | |
3232 k->oops_do(_oop_closure); | |
3233 | |
3234 _young_ref_counter_closure.reset_count(); | |
3235 k->oops_do(&_young_ref_counter_closure); | |
3236 if (_young_ref_counter_closure.count() > 0) { | |
3237 guarantee(k->has_modified_oops(), err_msg("Klass %p, has young refs but is not dirty.", k)); | |
3238 } | |
3239 } | |
3240 }; | |
3241 | |
342 | 3242 class VerifyLivenessOopClosure: public OopClosure { |
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3243 G1CollectedHeap* _g1h; |
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3244 VerifyOption _vo; |
342 | 3245 public: |
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3246 VerifyLivenessOopClosure(G1CollectedHeap* g1h, VerifyOption vo): |
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3247 _g1h(g1h), _vo(vo) |
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3248 { } |
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3249 void do_oop(narrowOop *p) { do_oop_work(p); } |
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3250 void do_oop( oop *p) { do_oop_work(p); } |
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3251 |
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3252 template <class T> void do_oop_work(T *p) { |
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3253 oop obj = oopDesc::load_decode_heap_oop(p); |
3772
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|
3254 guarantee(obj == NULL || !_g1h->is_obj_dead_cond(obj, _vo), |
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3255 "Dead object referenced by a not dead object"); |
342 | 3256 } |
3257 }; | |
3258 | |
3259 class VerifyObjsInRegionClosure: public ObjectClosure { | |
811 | 3260 private: |
342 | 3261 G1CollectedHeap* _g1h; |
3262 size_t _live_bytes; | |
3263 HeapRegion *_hr; | |
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|
3264 VerifyOption _vo; |
342 | 3265 public: |
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3266 // _vo == UsePrevMarking -> use "prev" marking information, |
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3267 // _vo == UseNextMarking -> use "next" marking information, |
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3268 // _vo == UseMarkWord -> use mark word from object header. |
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3269 VerifyObjsInRegionClosure(HeapRegion *hr, VerifyOption vo) |
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3270 : _live_bytes(0), _hr(hr), _vo(vo) { |
342 | 3271 _g1h = G1CollectedHeap::heap(); |
3272 } | |
3273 void do_object(oop o) { | |
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|
3274 VerifyLivenessOopClosure isLive(_g1h, _vo); |
342 | 3275 assert(o != NULL, "Huh?"); |
3772
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3276 if (!_g1h->is_obj_dead_cond(o, _vo)) { |
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3277 // If the object is alive according to the mark word, |
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|
3278 // then verify that the marking information agrees. |
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|
3279 // Note we can't verify the contra-positive of the |
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3280 // above: if the object is dead (according to the mark |
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|
3281 // word), it may not be marked, or may have been marked |
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3282 // but has since became dead, or may have been allocated |
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|
3283 // since the last marking. |
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|
3284 if (_vo == VerifyOption_G1UseMarkWord) { |
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|
3285 guarantee(!_g1h->is_obj_dead(o), "mark word and concurrent mark mismatch"); |
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|
3286 } |
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|
3287 |
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|
3288 o->oop_iterate_no_header(&isLive); |
1389
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|
3289 if (!_hr->obj_allocated_since_prev_marking(o)) { |
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changeset
|
3290 size_t obj_size = o->size(); // Make sure we don't overflow |
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|
3291 _live_bytes += (obj_size * HeapWordSize); |
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|
3292 } |
342 | 3293 } |
3294 } | |
3295 size_t live_bytes() { return _live_bytes; } | |
3296 }; | |
3297 | |
3298 class PrintObjsInRegionClosure : public ObjectClosure { | |
3299 HeapRegion *_hr; | |
3300 G1CollectedHeap *_g1; | |
3301 public: | |
3302 PrintObjsInRegionClosure(HeapRegion *hr) : _hr(hr) { | |
3303 _g1 = G1CollectedHeap::heap(); | |
3304 }; | |
3305 | |
3306 void do_object(oop o) { | |
3307 if (o != NULL) { | |
3308 HeapWord *start = (HeapWord *) o; | |
3309 size_t word_sz = o->size(); | |
3310 gclog_or_tty->print("\nPrinting obj "PTR_FORMAT" of size " SIZE_FORMAT | |
3311 " isMarkedPrev %d isMarkedNext %d isAllocSince %d\n", | |
3312 (void*) o, word_sz, | |
3313 _g1->isMarkedPrev(o), | |
3314 _g1->isMarkedNext(o), | |
3315 _hr->obj_allocated_since_prev_marking(o)); | |
3316 HeapWord *end = start + word_sz; | |
3317 HeapWord *cur; | |
3318 int *val; | |
3319 for (cur = start; cur < end; cur++) { | |
3320 val = (int *) cur; | |
3321 gclog_or_tty->print("\t "PTR_FORMAT":"PTR_FORMAT"\n", val, *val); | |
3322 } | |
3323 } | |
3324 } | |
3325 }; | |
3326 | |
3327 class VerifyRegionClosure: public HeapRegionClosure { | |
811 | 3328 private: |
6254
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3329 bool _par; |
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|
3330 VerifyOption _vo; |
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|
3331 bool _failures; |
811 | 3332 public: |
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3333 // _vo == UsePrevMarking -> use "prev" marking information, |
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3334 // _vo == UseNextMarking -> use "next" marking information, |
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|
3335 // _vo == UseMarkWord -> use mark word from object header. |
6008 | 3336 VerifyRegionClosure(bool par, VerifyOption vo) |
3337 : _par(par), | |
3772
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|
3338 _vo(vo), |
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|
3339 _failures(false) {} |
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|
3340 |
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|
3341 bool failures() { |
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|
3342 return _failures; |
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|
3343 } |
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3344 |
342 | 3345 bool doHeapRegion(HeapRegion* r) { |
637
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3346 if (!r->continuesHumongous()) { |
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3347 bool failures = false; |
6008 | 3348 r->verify(_vo, &failures); |
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3349 if (failures) { |
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|
3350 _failures = true; |
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|
3351 } else { |
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3352 VerifyObjsInRegionClosure not_dead_yet_cl(r, _vo); |
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3353 r->object_iterate(¬_dead_yet_cl); |
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3354 if (_vo != VerifyOption_G1UseNextMarking) { |
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3355 if (r->max_live_bytes() < not_dead_yet_cl.live_bytes()) { |
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|
3356 gclog_or_tty->print_cr("["PTR_FORMAT","PTR_FORMAT"] " |
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|
3357 "max_live_bytes "SIZE_FORMAT" " |
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|
3358 "< calculated "SIZE_FORMAT, |
2ace1c4ee8da
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diff
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|
3359 r->bottom(), r->end(), |
2ace1c4ee8da
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|
3360 r->max_live_bytes(), |
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|
3361 not_dead_yet_cl.live_bytes()); |
4787
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|
3362 _failures = true; |
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|
3363 } |
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|
3364 } else { |
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|
3365 // When vo == UseNextMarking we cannot currently do a sanity |
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|
3366 // check on the live bytes as the calculation has not been |
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diff
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|
3367 // finalized yet. |
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|
3368 } |
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|
3369 } |
342 | 3370 } |
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|
3371 return false; // stop the region iteration if we hit a failure |
342 | 3372 } |
3373 }; | |
3374 | |
12080 | 3375 // This is the task used for parallel verification of the heap regions |
390 | 3376 |
3377 class G1ParVerifyTask: public AbstractGangTask { | |
3378 private: | |
3379 G1CollectedHeap* _g1h; | |
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|
3380 VerifyOption _vo; |
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|
3381 bool _failures; |
390 | 3382 |
3383 public: | |
3772
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|
3384 // _vo == UsePrevMarking -> use "prev" marking information, |
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|
3385 // _vo == UseNextMarking -> use "next" marking information, |
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|
3386 // _vo == UseMarkWord -> use mark word from object header. |
6008 | 3387 G1ParVerifyTask(G1CollectedHeap* g1h, VerifyOption vo) : |
390 | 3388 AbstractGangTask("Parallel verify task"), |
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3389 _g1h(g1h), |
3772
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|
3390 _vo(vo), |
1020
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|
3391 _failures(false) { } |
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|
3392 |
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|
3393 bool failures() { |
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|
3394 return _failures; |
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|
3395 } |
390 | 3396 |
4728
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diff
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|
3397 void work(uint worker_id) { |
637
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diff
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|
3398 HandleMark hm; |
6008 | 3399 VerifyRegionClosure blk(true, _vo); |
4728
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|
3400 _g1h->heap_region_par_iterate_chunked(&blk, worker_id, |
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|
3401 _g1h->workers()->active_workers(), |
390 | 3402 HeapRegion::ParVerifyClaimValue); |
1020
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|
3403 if (blk.failures()) { |
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parents:
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|
3404 _failures = true; |
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|
3405 } |
390 | 3406 } |
3407 }; | |
3408 | |
12080 | 3409 void G1CollectedHeap::verify(bool silent, VerifyOption vo) { |
8855
24ef5fb05e0f
8010463: G1: Crashes with -UseTLAB and heap verification
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parents:
8853
diff
changeset
|
3410 if (SafepointSynchronize::is_at_safepoint()) { |
12080 | 3411 assert(Thread::current()->is_VM_thread(), |
3412 "Expected to be executed serially by the VM thread at this point"); | |
3413 | |
6725
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|
3414 if (!silent) { gclog_or_tty->print("Roots "); } |
3772
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diff
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|
3415 VerifyRootsClosure rootsCl(vo); |
12080 | 3416 G1VerifyCodeRootOopClosure codeRootsCl(this, &rootsCl, vo); |
3417 G1VerifyCodeRootBlobClosure blobsCl(&codeRootsCl); | |
6725
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|
3418 VerifyKlassClosure klassCl(this, &rootsCl); |
3772
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diff
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|
3419 |
3293
1f4413413144
7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
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diff
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|
3420 // 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
changeset
|
3421 // 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
|
3422 const int so = SO_AllClasses | SO_Strings | SO_CodeCache; |
3772
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|
3423 |
6725
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|
3424 // Need cleared claim bits for the strong roots processing |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
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|
3425 ClassLoaderDataGraph::clear_claimed_marks(); |
da91efe96a93
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diff
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|
3426 |
3293
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3289
diff
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|
3427 process_strong_roots(true, // activate StrongRootsScope |
6725
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diff
changeset
|
3428 false, // we set "is scavenging" to false, |
da91efe96a93
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|
3429 // so we don't reset the dirty cards. |
4910
caa4652b4414
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diff
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|
3430 ScanningOption(so), // roots scanning options |
342 | 3431 &rootsCl, |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
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|
3432 &blobsCl, |
6725
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|
3433 &klassCl |
da91efe96a93
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|
3434 ); |
da91efe96a93
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|
3435 |
12080 | 3436 bool failures = rootsCl.failures() || codeRootsCl.failures(); |
3772
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|
3437 |
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|
3438 if (vo != VerifyOption_G1UseMarkWord) { |
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diff
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|
3439 // If we're verifying during a full GC then the region sets |
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changeset
|
3440 // will have been torn down at the start of the GC. Therefore |
6747fd0512e0
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diff
changeset
|
3441 // verifying the region sets will fail. So we only verify |
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3766
diff
changeset
|
3442 // the region sets when not in a full GC. |
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3766
diff
changeset
|
3443 if (!silent) { gclog_or_tty->print("HeapRegionSets "); } |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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3766
diff
changeset
|
3444 verify_region_sets(); |
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3766
diff
changeset
|
3445 } |
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diff
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|
3446 |
2152 | 3447 if (!silent) { gclog_or_tty->print("HeapRegions "); } |
390 | 3448 if (GCParallelVerificationEnabled && ParallelGCThreads > 1) { |
3449 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
3450 "sanity check"); | |
3451 | |
6008 | 3452 G1ParVerifyTask task(this, vo); |
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|
3453 assert(UseDynamicNumberOfGCThreads || |
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|
3454 workers()->active_workers() == workers()->total_workers(), |
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|
3455 "If not dynamic should be using all the workers"); |
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|
3456 int n_workers = workers()->active_workers(); |
390 | 3457 set_par_threads(n_workers); |
3458 workers()->run_task(&task); | |
3459 set_par_threads(0); | |
1020
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|
3460 if (task.failures()) { |
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|
3461 failures = true; |
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|
3462 } |
390 | 3463 |
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|
3464 // Checks that the expected amount of parallel work was done. |
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diff
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|
3465 // The implication is that n_workers is > 0. |
390 | 3466 assert(check_heap_region_claim_values(HeapRegion::ParVerifyClaimValue), |
3467 "sanity check"); | |
3468 | |
3469 reset_heap_region_claim_values(); | |
3470 | |
3471 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
3472 "sanity check"); | |
3473 } else { | |
6008 | 3474 VerifyRegionClosure blk(false, vo); |
3766 | 3475 heap_region_iterate(&blk); |
1020
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|
3476 if (blk.failures()) { |
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diff
changeset
|
3477 failures = true; |
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|
3478 } |
390 | 3479 } |
2152 | 3480 if (!silent) gclog_or_tty->print("RemSet "); |
342 | 3481 rem_set()->verify(); |
1020
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|
3482 |
17764 | 3483 if (G1StringDedup::is_enabled()) { |
3484 if (!silent) gclog_or_tty->print("StrDedup "); | |
3485 G1StringDedup::verify(); | |
3486 } | |
3487 | |
1020
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|
3488 if (failures) { |
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diff
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|
3489 gclog_or_tty->print_cr("Heap:"); |
4073
53074c2c4600
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4072
diff
changeset
|
3490 // It helps to have the per-region information in the output to |
53074c2c4600
7099849: G1: include heap region information in hs_err files
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4072
diff
changeset
|
3491 // help us track down what went wrong. This is why we call |
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7099849: G1: include heap region information in hs_err files
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4072
diff
changeset
|
3492 // print_extended_on() instead of print_on(). |
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7099849: G1: include heap region information in hs_err files
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|
3493 print_extended_on(gclog_or_tty); |
17937
78bbf4d43a14
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|
3494 gclog_or_tty->cr(); |
1547
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6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
1545
diff
changeset
|
3495 #ifndef PRODUCT |
1044 | 3496 if (VerifyDuringGC && G1VerifyDuringGCPrintReachable) { |
1388 | 3497 concurrent_mark()->print_reachable("at-verification-failure", |
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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parents:
3766
diff
changeset
|
3498 vo, false /* all */); |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
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1019
diff
changeset
|
3499 } |
1547
fb1a39993f69
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
1545
diff
changeset
|
3500 #endif |
1020
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
1019
diff
changeset
|
3501 gclog_or_tty->flush(); |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
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parents:
1019
diff
changeset
|
3502 } |
ff2402f6a50b
6882730: G1: parallel heap verification messes up region dump
tonyp
parents:
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diff
changeset
|
3503 guarantee(!failures, "there should not have been any failures"); |
342 | 3504 } else { |
17764 | 3505 if (!silent) { |
3506 gclog_or_tty->print("(SKIPPING Roots, HeapRegionSets, HeapRegions, RemSet"); | |
3507 if (G1StringDedup::is_enabled()) { | |
3508 gclog_or_tty->print(", StrDedup"); | |
3509 } | |
3510 gclog_or_tty->print(") "); | |
3511 } | |
342 | 3512 } |
3513 } | |
3514 | |
12080 | 3515 void G1CollectedHeap::verify(bool silent) { |
3516 verify(silent, VerifyOption_G1UsePrevMarking); | |
3517 } | |
3518 | |
3519 double G1CollectedHeap::verify(bool guard, const char* msg) { | |
3520 double verify_time_ms = 0.0; | |
3521 | |
3522 if (guard && total_collections() >= VerifyGCStartAt) { | |
3523 double verify_start = os::elapsedTime(); | |
3524 HandleMark hm; // Discard invalid handles created during verification | |
3525 prepare_for_verify(); | |
3526 Universe::verify(VerifyOption_G1UsePrevMarking, msg); | |
3527 verify_time_ms = (os::elapsedTime() - verify_start) * 1000; | |
3528 } | |
3529 | |
3530 return verify_time_ms; | |
3531 } | |
3532 | |
3533 void G1CollectedHeap::verify_before_gc() { | |
3534 double verify_time_ms = verify(VerifyBeforeGC, " VerifyBeforeGC:"); | |
3535 g1_policy()->phase_times()->record_verify_before_time_ms(verify_time_ms); | |
3536 } | |
3537 | |
3538 void G1CollectedHeap::verify_after_gc() { | |
3539 double verify_time_ms = verify(VerifyAfterGC, " VerifyAfterGC:"); | |
3540 g1_policy()->phase_times()->record_verify_after_time_ms(verify_time_ms); | |
3541 } | |
3542 | |
342 | 3543 class PrintRegionClosure: public HeapRegionClosure { |
3544 outputStream* _st; | |
3545 public: | |
3546 PrintRegionClosure(outputStream* st) : _st(st) {} | |
3547 bool doHeapRegion(HeapRegion* r) { | |
3548 r->print_on(_st); | |
3549 return false; | |
3550 } | |
3551 }; | |
3552 | |
17833
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|
3553 bool G1CollectedHeap::is_obj_dead_cond(const oop obj, |
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|
3554 const HeapRegion* hr, |
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|
3555 const VerifyOption vo) const { |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
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|
3556 switch (vo) { |
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8038498: Fix includes and C inlining after 8035330
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|
3557 case VerifyOption_G1UsePrevMarking: return is_obj_dead(obj, hr); |
bfdf528be8e8
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|
3558 case VerifyOption_G1UseNextMarking: return is_obj_ill(obj, hr); |
bfdf528be8e8
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|
3559 case VerifyOption_G1UseMarkWord: return !obj->is_gc_marked(); |
bfdf528be8e8
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|
3560 default: ShouldNotReachHere(); |
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|
3561 } |
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|
3562 return false; // keep some compilers happy |
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diff
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|
3563 } |
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|
3564 |
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|
3565 bool G1CollectedHeap::is_obj_dead_cond(const oop obj, |
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|
3566 const VerifyOption vo) const { |
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|
3567 switch (vo) { |
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|
3568 case VerifyOption_G1UsePrevMarking: return is_obj_dead(obj); |
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|
3569 case VerifyOption_G1UseNextMarking: return is_obj_ill(obj); |
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|
3570 case VerifyOption_G1UseMarkWord: return !obj->is_gc_marked(); |
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|
3571 default: ShouldNotReachHere(); |
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|
3572 } |
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|
3573 return false; // keep some compilers happy |
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|
3574 } |
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|
3575 |
342 | 3576 void G1CollectedHeap::print_on(outputStream* st) const { |
838
0316eac49d5a
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|
3577 st->print(" %-20s", "garbage-first heap"); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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diff
changeset
|
3578 st->print(" total " SIZE_FORMAT "K, used " SIZE_FORMAT "K", |
846
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
tonyp
parents:
845
diff
changeset
|
3579 capacity()/K, used_unlocked()/K); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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parents:
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diff
changeset
|
3580 st->print(" [" INTPTR_FORMAT ", " INTPTR_FORMAT ", " INTPTR_FORMAT ")", |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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diff
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|
3581 _g1_storage.low_boundary(), |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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811
diff
changeset
|
3582 _g1_storage.high(), |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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diff
changeset
|
3583 _g1_storage.high_boundary()); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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diff
changeset
|
3584 st->cr(); |
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3983
diff
changeset
|
3585 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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diff
changeset
|
3586 uint young_regions = _young_list->length(); |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3587 st->print("%u young (" SIZE_FORMAT "K), ", young_regions, |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
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diff
changeset
|
3588 (size_t) young_regions * HeapRegion::GrainBytes / K); |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
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parents:
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diff
changeset
|
3589 uint survivor_regions = g1_policy()->recorded_survivor_regions(); |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3590 st->print("%u survivors (" SIZE_FORMAT "K)", survivor_regions, |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3591 (size_t) survivor_regions * HeapRegion::GrainBytes / K); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3592 st->cr(); |
6863
04155d9c8c76
8000358: G1: metaspace information not printed in PrintHeapAtGC output nor in hs_err file
johnc
parents:
6819
diff
changeset
|
3593 MetaspaceAux::print_on(st); |
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3594 } |
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3595 |
53074c2c4600
7099849: G1: include heap region information in hs_err files
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parents:
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diff
changeset
|
3596 void G1CollectedHeap::print_extended_on(outputStream* st) const { |
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3597 print_on(st); |
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3598 |
53074c2c4600
7099849: G1: include heap region information in hs_err files
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parents:
4072
diff
changeset
|
3599 // Print the per-region information. |
53074c2c4600
7099849: G1: include heap region information in hs_err files
tonyp
parents:
4072
diff
changeset
|
3600 st->cr(); |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3601 st->print_cr("Heap Regions: (Y=young(eden), SU=young(survivor), " |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
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diff
changeset
|
3602 "HS=humongous(starts), HC=humongous(continues), " |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3603 "CS=collection set, F=free, TS=gc time stamp, " |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3604 "PTAMS=previous top-at-mark-start, " |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3605 "NTAMS=next top-at-mark-start)"); |
342 | 3606 PrintRegionClosure blk(st); |
3766 | 3607 heap_region_iterate(&blk); |
342 | 3608 } |
3609 | |
9076
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3610 void G1CollectedHeap::print_on_error(outputStream* st) const { |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3611 this->CollectedHeap::print_on_error(st); |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3612 |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3613 if (_cm != NULL) { |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3614 st->cr(); |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3615 _cm->print_on_error(st); |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3616 } |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3617 } |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3618 |
342 | 3619 void G1CollectedHeap::print_gc_threads_on(outputStream* st) const { |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
3620 if (G1CollectedHeap::use_parallel_gc_threads()) { |
1019 | 3621 workers()->print_worker_threads_on(st); |
3622 } | |
3623 _cmThread->print_on(st); | |
342 | 3624 st->cr(); |
1019 | 3625 _cm->print_worker_threads_on(st); |
3626 _cg1r->print_worker_threads_on(st); | |
17764 | 3627 if (G1StringDedup::is_enabled()) { |
3628 G1StringDedup::print_worker_threads_on(st); | |
3629 } | |
342 | 3630 } |
3631 | |
3632 void G1CollectedHeap::gc_threads_do(ThreadClosure* tc) const { | |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
3633 if (G1CollectedHeap::use_parallel_gc_threads()) { |
342 | 3634 workers()->threads_do(tc); |
3635 } | |
3636 tc->do_thread(_cmThread); | |
794 | 3637 _cg1r->threads_do(tc); |
17764 | 3638 if (G1StringDedup::is_enabled()) { |
3639 G1StringDedup::threads_do(tc); | |
3640 } | |
342 | 3641 } |
3642 | |
3643 void G1CollectedHeap::print_tracing_info() const { | |
3644 // We'll overload this to mean "trace GC pause statistics." | |
3645 if (TraceGen0Time || TraceGen1Time) { | |
3646 // The "G1CollectorPolicy" is keeping track of these stats, so delegate | |
3647 // to that. | |
3648 g1_policy()->print_tracing_info(); | |
3649 } | |
751 | 3650 if (G1SummarizeRSetStats) { |
342 | 3651 g1_rem_set()->print_summary_info(); |
3652 } | |
1282 | 3653 if (G1SummarizeConcMark) { |
342 | 3654 concurrent_mark()->print_summary_info(); |
3655 } | |
3656 g1_policy()->print_yg_surv_rate_info(); | |
3657 SpecializationStats::print(); | |
3658 } | |
3659 | |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
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3774
diff
changeset
|
3660 #ifndef PRODUCT |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
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3774
diff
changeset
|
3661 // Helpful for debugging RSet issues. |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3662 |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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diff
changeset
|
3663 class PrintRSetsClosure : public HeapRegionClosure { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3664 private: |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3665 const char* _msg; |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
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3774
diff
changeset
|
3666 size_t _occupied_sum; |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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3774
diff
changeset
|
3667 |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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3774
diff
changeset
|
3668 public: |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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diff
changeset
|
3669 bool doHeapRegion(HeapRegion* r) { |
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7046182: G1: remove unnecessary iterations over the collection set
tonyp
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diff
changeset
|
3670 HeapRegionRemSet* hrrs = r->rem_set(); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
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3774
diff
changeset
|
3671 size_t occupied = hrrs->occupied(); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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3774
diff
changeset
|
3672 _occupied_sum += occupied; |
e8b0b0392037
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3774
diff
changeset
|
3673 |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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3774
diff
changeset
|
3674 gclog_or_tty->print_cr("Printing RSet for region "HR_FORMAT, |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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parents:
3774
diff
changeset
|
3675 HR_FORMAT_PARAMS(r)); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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parents:
3774
diff
changeset
|
3676 if (occupied == 0) { |
e8b0b0392037
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tonyp
parents:
3774
diff
changeset
|
3677 gclog_or_tty->print_cr(" RSet is empty"); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
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3774
diff
changeset
|
3678 } else { |
e8b0b0392037
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tonyp
parents:
3774
diff
changeset
|
3679 hrrs->print(); |
e8b0b0392037
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tonyp
parents:
3774
diff
changeset
|
3680 } |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3681 gclog_or_tty->print_cr("----------"); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3682 return false; |
e8b0b0392037
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tonyp
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3774
diff
changeset
|
3683 } |
e8b0b0392037
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3774
diff
changeset
|
3684 |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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3774
diff
changeset
|
3685 PrintRSetsClosure(const char* msg) : _msg(msg), _occupied_sum(0) { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3686 gclog_or_tty->cr(); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3687 gclog_or_tty->print_cr("========================================"); |
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17935
diff
changeset
|
3688 gclog_or_tty->print_cr("%s", msg); |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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3774
diff
changeset
|
3689 gclog_or_tty->cr(); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3690 } |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3691 |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3692 ~PrintRSetsClosure() { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3693 gclog_or_tty->print_cr("Occupied Sum: "SIZE_FORMAT, _occupied_sum); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3694 gclog_or_tty->print_cr("========================================"); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3695 gclog_or_tty->cr(); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3696 } |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3697 }; |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3698 |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3699 void G1CollectedHeap::print_cset_rsets() { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3700 PrintRSetsClosure cl("Printing CSet RSets"); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3701 collection_set_iterate(&cl); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3702 } |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3703 |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3704 void G1CollectedHeap::print_all_rsets() { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3705 PrintRSetsClosure cl("Printing All RSets");; |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3706 heap_region_iterate(&cl); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3707 } |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3708 #endif // PRODUCT |
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7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3709 |
342 | 3710 G1CollectedHeap* G1CollectedHeap::heap() { |
3711 assert(_sh->kind() == CollectedHeap::G1CollectedHeap, | |
3712 "not a garbage-first heap"); | |
3713 return _g1h; | |
3714 } | |
3715 | |
3716 void G1CollectedHeap::gc_prologue(bool full /* Ignored */) { | |
1245
6484c4ee11cb
6904516: More object array barrier fixes, following up on 6906727
ysr
parents:
1166
diff
changeset
|
3717 // always_do_update_barrier = false; |
342 | 3718 assert(InlineCacheBuffer::is_empty(), "should have cleaned up ICBuffer"); |
3719 // Fill TLAB's and such | |
17727 | 3720 accumulate_statistics_all_tlabs(); |
342 | 3721 ensure_parsability(true); |
12339
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3722 |
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3723 if (G1SummarizeRSetStats && (G1SummarizeRSetStatsPeriod > 0) && |
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3724 (total_collections() % G1SummarizeRSetStatsPeriod == 0)) { |
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3725 g1_rem_set()->print_periodic_summary_info("Before GC RS summary"); |
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3726 } |
342 | 3727 } |
3728 | |
3729 void G1CollectedHeap::gc_epilogue(bool full /* Ignored */) { | |
10372
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3730 |
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3731 if (G1SummarizeRSetStats && |
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3732 (G1SummarizeRSetStatsPeriod > 0) && |
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3733 // 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
|
3734 ((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
|
3735 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
|
3736 } |
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3737 |
342 | 3738 // FIXME: what is this about? |
3739 // I'm ignoring the "fill_newgen()" call if "alloc_event_enabled" | |
3740 // is set. | |
3741 COMPILER2_PRESENT(assert(DerivedPointerTable::is_empty(), | |
3742 "derived pointer present")); | |
1245
6484c4ee11cb
6904516: More object array barrier fixes, following up on 6906727
ysr
parents:
1166
diff
changeset
|
3743 // always_do_update_barrier = true; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3744 |
17727 | 3745 resize_all_tlabs(); |
3746 | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3747 // We have just completed a GC. Update the soft reference |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3748 // policy with the new heap occupancy |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3749 Universe::update_heap_info_at_gc(); |
342 | 3750 } |
3751 | |
1973 | 3752 HeapWord* G1CollectedHeap::do_collection_pause(size_t word_size, |
3753 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
|
3754 bool* succeeded, |
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
12082
diff
changeset
|
3755 GCCause::Cause gc_cause) { |
1973 | 3756 assert_heap_not_locked_and_not_at_safepoint(); |
342 | 3757 g1_policy()->record_stop_world_start(); |
1973 | 3758 VM_G1IncCollectionPause op(gc_count_before, |
3759 word_size, | |
3760 false, /* should_initiate_conc_mark */ | |
3761 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
|
3762 gc_cause); |
1973 | 3763 VMThread::execute(&op); |
3764 | |
3765 HeapWord* result = op.result(); | |
3766 bool ret_succeeded = op.prologue_succeeded() && op.pause_succeeded(); | |
3767 assert(result == NULL || ret_succeeded, | |
3768 "the result should be NULL if the VM did not succeed"); | |
3769 *succeeded = ret_succeeded; | |
3770 | |
3771 assert_heap_not_locked(); | |
3772 return result; | |
342 | 3773 } |
3774 | |
3775 void | |
3776 G1CollectedHeap::doConcurrentMark() { | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3777 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
|
3778 if (!_cmThread->in_progress()) { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3779 _cmThread->set_started(); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3780 CGC_lock->notify(); |
342 | 3781 } |
3782 } | |
3783 | |
3784 size_t G1CollectedHeap::pending_card_num() { | |
3785 size_t extra_cards = 0; | |
3786 JavaThread *curr = Threads::first(); | |
3787 while (curr != NULL) { | |
3788 DirtyCardQueue& dcq = curr->dirty_card_queue(); | |
3789 extra_cards += dcq.size(); | |
3790 curr = curr->next(); | |
3791 } | |
3792 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
3793 size_t buffer_size = dcqs.buffer_size(); | |
3794 size_t buffer_num = dcqs.completed_buffers_num(); | |
6611 | 3795 |
3796 // PtrQueueSet::buffer_size() and PtrQueue:size() return sizes | |
3797 // in bytes - not the number of 'entries'. We need to convert | |
3798 // into a number of cards. | |
3799 return (buffer_size * buffer_num + extra_cards) / oopSize; | |
342 | 3800 } |
3801 | |
3802 size_t G1CollectedHeap::cards_scanned() { | |
1861 | 3803 return g1_rem_set()->cardsScanned(); |
342 | 3804 } |
3805 | |
3806 void | |
3807 G1CollectedHeap::setup_surviving_young_words() { | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3808 assert(_surviving_young_words == NULL, "pre-condition"); |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3809 uint array_length = g1_policy()->young_cset_region_length(); |
6197 | 3810 _surviving_young_words = NEW_C_HEAP_ARRAY(size_t, (size_t) array_length, mtGC); |
342 | 3811 if (_surviving_young_words == NULL) { |
10161
746b070f5022
8011661: Insufficient memory message says "malloc" when sometimes it should say "mmap"
ccheung
parents:
10099
diff
changeset
|
3812 vm_exit_out_of_memory(sizeof(size_t) * array_length, OOM_MALLOC_ERROR, |
342 | 3813 "Not enough space for young surv words summary."); |
3814 } | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3815 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
|
3816 #ifdef ASSERT |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3817 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
|
3818 assert( _surviving_young_words[i] == 0, "memset above" ); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3819 } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3820 #endif // !ASSERT |
342 | 3821 } |
3822 | |
3823 void | |
3824 G1CollectedHeap::update_surviving_young_words(size_t* surv_young_words) { | |
3825 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
|
3826 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
|
3827 for (uint i = 0; i < array_length; ++i) { |
342 | 3828 _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
|
3829 } |
342 | 3830 } |
3831 | |
3832 void | |
3833 G1CollectedHeap::cleanup_surviving_young_words() { | |
3834 guarantee( _surviving_young_words != NULL, "pre-condition" ); | |
6197 | 3835 FREE_C_HEAP_ARRAY(size_t, _surviving_young_words, mtGC); |
342 | 3836 _surviving_young_words = NULL; |
3837 } | |
3838 | |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3839 #ifdef ASSERT |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3840 class VerifyCSetClosure: public HeapRegionClosure { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3841 public: |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3842 bool doHeapRegion(HeapRegion* hr) { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3843 // 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
|
3844 // 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
|
3845 // 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
|
3846 // 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
|
3847 // 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
|
3848 // 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
|
3849 // 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
|
3850 // 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
|
3851 // evacuation failure handling. |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3852 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
|
3853 |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3854 // 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
|
3855 // perform on CSet regions. |
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3856 return false; |
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3857 } |
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3858 }; |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3859 #endif // ASSERT |
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3860 |
1709 | 3861 #if TASKQUEUE_STATS |
3862 void G1CollectedHeap::print_taskqueue_stats_hdr(outputStream* const st) { | |
3863 st->print_raw_cr("GC Task Stats"); | |
3864 st->print_raw("thr "); TaskQueueStats::print_header(1, st); st->cr(); | |
3865 st->print_raw("--- "); TaskQueueStats::print_header(2, st); st->cr(); | |
3866 } | |
3867 | |
3868 void G1CollectedHeap::print_taskqueue_stats(outputStream* const st) const { | |
3869 print_taskqueue_stats_hdr(st); | |
3870 | |
3871 TaskQueueStats totals; | |
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3872 const int n = workers() != NULL ? workers()->total_workers() : 1; |
1709 | 3873 for (int i = 0; i < n; ++i) { |
3874 st->print("%3d ", i); task_queue(i)->stats.print(st); st->cr(); | |
3875 totals += task_queue(i)->stats; | |
3876 } | |
3877 st->print_raw("tot "); totals.print(st); st->cr(); | |
3878 | |
3879 DEBUG_ONLY(totals.verify()); | |
3880 } | |
3881 | |
3882 void G1CollectedHeap::reset_taskqueue_stats() { | |
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3883 const int n = workers() != NULL ? workers()->total_workers() : 1; |
1709 | 3884 for (int i = 0; i < n; ++i) { |
3885 task_queue(i)->stats.reset(); | |
3886 } | |
3887 } | |
3888 #endif // TASKQUEUE_STATS | |
3889 | |
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3890 void G1CollectedHeap::log_gc_header() { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3891 if (!G1Log::fine()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3892 return; |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3893 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3894 |
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
3895 gclog_or_tty->gclog_stamp(_gc_tracer_stw->gc_id()); |
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3896 |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3897 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
|
3898 .append(g1_policy()->gcs_are_young() ? "(young)" : "(mixed)") |
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3899 .append(g1_policy()->during_initial_mark_pause() ? " (initial-mark)" : ""); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3900 |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3901 gclog_or_tty->print("[%s", (const char*)gc_cause_str); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3902 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3903 |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3904 void G1CollectedHeap::log_gc_footer(double pause_time_sec) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3905 if (!G1Log::fine()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3906 return; |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3907 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3908 |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3909 if (G1Log::finer()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3910 if (evacuation_failed()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3911 gclog_or_tty->print(" (to-space exhausted)"); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3912 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3913 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
|
3914 g1_policy()->phase_times()->note_gc_end(); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3915 g1_policy()->phase_times()->print(pause_time_sec); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3916 g1_policy()->print_detailed_heap_transition(); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3917 } else { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3918 if (evacuation_failed()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3919 gclog_or_tty->print("--"); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3920 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3921 g1_policy()->print_heap_transition(); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3922 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
|
3923 } |
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
3924 gclog_or_tty->flush(); |
6752
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 |
1973 | 3927 bool |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3928 G1CollectedHeap::do_collection_pause_at_safepoint(double target_pause_time_ms) { |
2152 | 3929 assert_at_safepoint(true /* should_be_vm_thread */); |
3930 guarantee(!is_gc_active(), "collection is not reentrant"); | |
3931 | |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3932 if (GC_locker::check_active_before_gc()) { |
1973 | 3933 return false; |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3934 } |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3935 |
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
3936 _gc_timer_stw->register_gc_start(); |
10405 | 3937 |
3938 _gc_tracer_stw->report_gc_start(gc_cause(), _gc_timer_stw->gc_start()); | |
3939 | |
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2039
diff
changeset
|
3940 SvcGCMarker sgcm(SvcGCMarker::MINOR); |
2039
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3941 ResourceMark rm; |
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3942 |
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4787
diff
changeset
|
3943 print_heap_before_gc(); |
10405 | 3944 trace_heap_before_gc(_gc_tracer_stw); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3945 |
2152 | 3946 verify_region_sets_optional(); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3947 verify_dirty_young_regions(); |
2152 | 3948 |
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3949 // 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
|
3950 // 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
|
3951 // for the duration of this pause. |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3952 g1_policy()->decide_on_conc_mark_initiation(); |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3953 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3954 // 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
|
3955 assert(!g1_policy()->during_initial_mark_pause() || |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3956 g1_policy()->gcs_are_young(), "sanity"); |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3957 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3958 // 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
|
3959 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
|
3960 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3961 // 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
|
3962 // 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
|
3963 // 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
|
3964 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
|
3965 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3966 // 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
|
3967 { |
10405 | 3968 EvacuationInfo evacuation_info; |
3969 | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3970 if (g1_policy()->during_initial_mark_pause()) { |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3971 // 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
|
3972 // full collection counter. |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
3973 increment_old_marking_cycles_started(); |
10405 | 3974 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
|
3975 } |
10405 | 3976 |
3977 _gc_tracer_stw->report_yc_type(yc_type()); | |
3978 | |
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
3979 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
6030 | 3980 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3981 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
|
3982 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
|
3983 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
|
3984 g1_policy()->phase_times()->note_gc_start(active_workers); |
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3985 log_gc_header(); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3986 |
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
3987 TraceCollectorStats tcs(g1mm()->incremental_collection_counters()); |
3356
78542e2b5e35
7036199: Adding a notification to the implementation of GarbageCollectorMXBeans
fparain
parents:
3323
diff
changeset
|
3988 TraceMemoryManagerStats tms(false /* fullGC */, gc_cause()); |
1089
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
tonyp
parents:
1088
diff
changeset
|
3989 |
2361 | 3990 // If the secondary_free_list is not empty, append it to the |
3991 // free_list. No need to wait for the cleanup operation to finish; | |
3992 // the region allocation code will check the secondary_free_list | |
3993 // and wait if necessary. If the G1StressConcRegionFreeing flag is | |
3994 // set, skip this step so that the region allocation code has to | |
3995 // get entries from the secondary_free_list. | |
2152 | 3996 if (!G1StressConcRegionFreeing) { |
2361 | 3997 append_secondary_free_list_if_not_empty_with_lock(); |
2152 | 3998 } |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3999 |
12080 | 4000 assert(check_young_list_well_formed(), "young list should be well formed"); |
4001 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
4002 "sanity check"); | |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4003 |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4004 // 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
|
4005 // 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
|
4006 // it will be set. |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
4007 |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4008 { // 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
|
4009 IsGCActiveMark x; |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4010 |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4011 gc_prologue(false); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4012 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
|
4013 increment_gc_time_stamp(); |
342 | 4014 |
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
|
4015 verify_before_gc(); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4016 |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4017 COMPILER2_PRESENT(DerivedPointerTable::clear()); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4018 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4019 // Please see comment in g1CollectedHeap.hpp and |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4020 // G1CollectedHeap::ref_processing_init() to see how |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4021 // reference processing currently works in G1. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4022 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4023 // Enable discovery in the STW reference processor |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4024 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4025 true /*verify_no_refs*/); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4026 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4027 { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4028 // We want to temporarily turn off discovery by the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4029 // CM ref processor, if necessary, and turn it back on |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4030 // on again later if we do. Using a scoped |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4031 // NoRefDiscovery object will do this. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4032 NoRefDiscovery no_cm_discovery(ref_processor_cm()); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4033 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4034 // 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
|
4035 // of the collection set!). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4036 release_mutator_alloc_region(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4037 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4038 // We should call this after we retire the mutator alloc |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4039 // region(s) so that all the ALLOC / RETIRE events are generated |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4040 // before the start GC event. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4041 _hr_printer.start_gc(false /* full */, (size_t) total_collections()); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4042 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4043 // 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
|
4044 // 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
|
4045 // 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
|
4046 // |
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4047 // 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
|
4048 // |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4049 // The elapsed time induced by the start time below deliberately elides |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4050 // 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
|
4051 double sample_start_time_sec = os::elapsedTime(); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4052 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4053 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4054 gclog_or_tty->print_cr("\nBefore recording pause start.\nYoung_list:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4055 _young_list->print(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4056 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
|
4057 #endif // YOUNG_LIST_VERBOSE |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4058 |
10098
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
4059 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
|
4060 |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4061 double scan_wait_start = os::elapsedTime(); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4062 // 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
|
4063 // 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
|
4064 // 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
|
4065 // moving them during the GC. |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4066 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
|
4067 double wait_time_ms = 0.0; |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4068 if (waited) { |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4069 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
|
4070 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
|
4071 } |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4072 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
|
4073 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4074 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4075 gclog_or_tty->print_cr("\nAfter recording pause start.\nYoung_list:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4076 _young_list->print(); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4077 #endif // YOUNG_LIST_VERBOSE |
342 | 4078 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4079 if (g1_policy()->during_initial_mark_pause()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4080 concurrent_mark()->checkpointRootsInitialPre(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4081 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4082 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4083 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4084 gclog_or_tty->print_cr("\nBefore choosing collection set.\nYoung_list:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4085 _young_list->print(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4086 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
|
4087 #endif // YOUNG_LIST_VERBOSE |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4088 |
10405 | 4089 g1_policy()->finalize_cset(target_pause_time_ms, evacuation_info); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4090 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4091 _cm->note_start_of_gc(); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4092 // 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
|
4093 // 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
|
4094 // 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
|
4095 // ensure that the CSet has been finalized. |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4096 _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
|
4097 true /* verify_enqueued_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4098 false /* verify_thread_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4099 true /* verify_fingers */); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4100 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4101 if (_hr_printer.is_active()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4102 HeapRegion* hr = g1_policy()->collection_set(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4103 while (hr != NULL) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4104 G1HRPrinter::RegionType type; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4105 if (!hr->is_young()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4106 type = G1HRPrinter::Old; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4107 } else if (hr->is_survivor()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4108 type = G1HRPrinter::Survivor; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4109 } else { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4110 type = G1HRPrinter::Eden; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4111 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4112 _hr_printer.cset(hr); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4113 hr = hr->next_in_collection_set(); |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4114 } |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4115 } |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4116 |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
4117 #ifdef ASSERT |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4118 VerifyCSetClosure cl; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4119 collection_set_iterate(&cl); |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
4120 #endif // ASSERT |
1707 | 4121 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4122 setup_surviving_young_words(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4123 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4124 // Initialize the GC alloc regions. |
10405 | 4125 init_gc_alloc_regions(evacuation_info); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4126 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4127 // Actually do the work... |
10405 | 4128 evacuate_collection_set(evacuation_info); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4129 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4130 // 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
|
4131 // (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
|
4132 // 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
|
4133 // 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
|
4134 // we checked. |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4135 _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
|
4136 false /* verify_enqueued_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4137 true /* verify_thread_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4138 true /* verify_fingers */); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4139 |
10405 | 4140 free_collection_set(g1_policy()->collection_set(), evacuation_info); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4141 g1_policy()->clear_collection_set(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4142 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4143 cleanup_surviving_young_words(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4144 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4145 // Start a new incremental collection set for the next pause. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4146 g1_policy()->start_incremental_cset_building(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4147 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4148 // Clear the _cset_fast_test bitmap in anticipation of adding |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4149 // regions to the incremental collection set for the next |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4150 // evacuation pause. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4151 clear_cset_fast_test(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4152 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4153 _young_list->reset_sampled_info(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4154 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4155 // Don't check the whole heap at this point as the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4156 // GC alloc regions from this pause have been tagged |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4157 // as survivors and moved on to the survivor list. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4158 // Survivor regions will fail the !is_young() check. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4159 assert(check_young_list_empty(false /* check_heap */), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4160 "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
|
4161 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4162 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4163 gclog_or_tty->print_cr("Before recording survivors.\nYoung List:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4164 _young_list->print(); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4165 #endif // YOUNG_LIST_VERBOSE |
342 | 4166 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4167 g1_policy()->record_survivor_regions(_young_list->survivor_length(), |
10405 | 4168 _young_list->first_survivor_region(), |
4169 _young_list->last_survivor_region()); | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4170 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4171 _young_list->reset_auxilary_lists(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4172 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4173 if (evacuation_failed()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4174 _summary_bytes_used = recalculate_used(); |
10405 | 4175 uint n_queues = MAX2((int)ParallelGCThreads, 1); |
4176 for (uint i = 0; i < n_queues; i++) { | |
4177 if (_evacuation_failed_info_array[i].has_failed()) { | |
4178 _gc_tracer_stw->report_evacuation_failed(_evacuation_failed_info_array[i]); | |
4179 } | |
4180 } | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4181 } else { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4182 // The "used" of the the collection set have already been subtracted |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4183 // when they were freed. Add in the bytes evacuated. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4184 _summary_bytes_used += g1_policy()->bytes_copied_during_gc(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4185 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4186 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4187 if (g1_policy()->during_initial_mark_pause()) { |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4188 // 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
|
4189 // 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
|
4190 // appropriate initialization is done on the CM object. |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4191 concurrent_mark()->checkpointRootsInitialPost(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4192 set_marking_started(); |
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4193 // 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
|
4194 // 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
|
4195 // the current thread has completed its logging output. |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4196 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4197 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4198 allocate_dummy_regions(); |
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
4199 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4200 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4201 gclog_or_tty->print_cr("\nEnd of the pause.\nYoung_list:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4202 _young_list->print(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4203 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
|
4204 #endif // YOUNG_LIST_VERBOSE |
342 | 4205 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4206 init_mutator_alloc_region(); |
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 size_t expand_bytes = g1_policy()->expansion_amount(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4210 if (expand_bytes > 0) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4211 size_t bytes_before = capacity(); |
4785 | 4212 // No need for an ergo verbose message here, |
4213 // expansion_amount() does this when it returns a value > 0. | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4214 if (!expand(expand_bytes)) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4215 // We failed to expand the heap so let's verify that |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4216 // committed/uncommitted amount match the backing store |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4217 assert(capacity() == _g1_storage.committed_size(), "committed size mismatch"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4218 assert(max_capacity() == _g1_storage.reserved_size(), "reserved size mismatch"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4219 } |
3920
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4220 } |
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4221 } |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4222 |
10405 | 4223 // 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
|
4224 // 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
|
4225 _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
|
4226 true /* verify_enqueued_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4227 true /* verify_thread_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4228 true /* verify_fingers */); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4229 _cm->note_end_of_gc(); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4230 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4231 // 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
|
4232 // 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
|
4233 // 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
|
4234 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
|
4235 double pause_time_ms = (sample_end_time_sec - sample_start_time_sec) * MILLIUNITS; |
10405 | 4236 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
|
4237 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4238 MemoryService::track_memory_usage(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4239 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4240 // 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
|
4241 // update buffers to bring the RSets up-to-date if |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4242 // G1HRRSFlushLogBuffersOnVerify has been set. While scanning |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4243 // 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
|
4244 // regions we just allocated to (i.e., the GC alloc |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4245 // regions). However, during the last GC we called |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4246 // set_saved_mark() on all the GC alloc regions, so card |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4247 // scanning might skip the [saved_mark_word()...top()] area of |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4248 // those regions (i.e., the area we allocated objects into |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4249 // during the last GC). But it shouldn't. Given that |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4250 // saved_mark_word() is conditional on whether the GC time stamp |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4251 // 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
|
4252 // 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
|
4253 // regions and saved_mark_word() will simply return top() for |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4254 // 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
|
4255 // than iterating over the regions and fixing them. In fact, the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4256 // GC time stamp increment here also ensures that |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4257 // saved_mark_word() will return top() between pauses, i.e., |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4258 // during concurrent refinement. So we don't need the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4259 // is_gc_active() check to decided which top to use when |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4260 // scanning cards (see CR 7039627). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4261 increment_gc_time_stamp(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4262 |
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
|
4263 verify_after_gc(); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4264 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4265 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4266 ref_processor_stw()->verify_no_references_recorded(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4267 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4268 // 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
|
4269 } |
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4270 |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4271 // 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
|
4272 // 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
|
4273 // 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
|
4274 // RETIRE events are generated before the end GC event. |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4275 _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
|
4276 |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4277 if (mark_in_progress()) { |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4278 concurrent_mark()->update_g1_committed(); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4279 } |
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4280 |
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4281 #ifdef TRACESPINNING |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4282 ParallelTaskTerminator::print_termination_counts(); |
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4283 #endif |
342 | 4284 |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4285 gc_epilogue(false); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4286 } |
6121
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4287 |
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
4288 // 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
|
4289 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
|
4290 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4291 // 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
|
4292 // 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
|
4293 // 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
|
4294 // logging output either. |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4295 |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4296 _hrs.verify_optional(); |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4297 verify_region_sets_optional(); |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4298 |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4299 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
|
4300 TASKQUEUE_STATS_ONLY(reset_taskqueue_stats()); |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4301 |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4302 print_heap_after_gc(); |
10405 | 4303 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
|
4304 |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4305 // 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
|
4306 // 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
|
4307 // 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
|
4308 // before any GC notifications are raised. |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4309 g1mm()->update_sizes(); |
10405 | 4310 |
4311 _gc_tracer_stw->report_evacuation_info(&evacuation_info); | |
4312 _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
|
4313 _gc_timer_stw->register_gc_end(); |
10405 | 4314 _gc_tracer_stw->report_gc_end(_gc_timer_stw->gc_end(), _gc_timer_stw->time_partitions()); |
4315 } | |
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4316 // 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
|
4317 // 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
|
4318 // that came from the pause. |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4319 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4320 if (should_start_conc_mark) { |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4321 // CAUTION: after the doConcurrentMark() call below, |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4322 // the concurrent marking thread(s) could be running |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4323 // concurrently with us. Make sure that anything after |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4324 // 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
|
4325 // 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
|
4326 // not start until the safepoint itself is released in |
20192 | 4327 // SuspendibleThreadSet::desynchronize(). |
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4328 doConcurrentMark(); |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4329 } |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4330 |
1973 | 4331 return true; |
342 | 4332 } |
4333 | |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4334 size_t G1CollectedHeap::desired_plab_sz(GCAllocPurpose purpose) |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4335 { |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4336 size_t gclab_word_size; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4337 switch (purpose) { |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4338 case GCAllocForSurvived: |
6595 | 4339 gclab_word_size = _survivor_plab_stats.desired_plab_sz(); |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4340 break; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4341 case GCAllocForTenured: |
6595 | 4342 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4343 break; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4344 default: |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4345 assert(false, "unknown GCAllocPurpose"); |
6595 | 4346 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4347 break; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4348 } |
6595 | 4349 |
4350 // Prevent humongous PLAB sizes for two reasons: | |
4351 // * PLABs are allocated using a similar paths as oops, but should | |
4352 // never be in a humongous region | |
4353 // * Allowing humongous PLABs needlessly churns the region free lists | |
4354 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
|
4355 } |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4356 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4357 void G1CollectedHeap::init_mutator_alloc_region() { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4358 assert(_mutator_alloc_region.get() == NULL, "pre-condition"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4359 _mutator_alloc_region.init(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4360 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4361 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4362 void G1CollectedHeap::release_mutator_alloc_region() { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4363 _mutator_alloc_region.release(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4364 assert(_mutator_alloc_region.get() == NULL, "post-condition"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4365 } |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4366 |
10405 | 4367 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
|
4368 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
|
4369 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4370 _survivor_gc_alloc_region.init(); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4371 _old_gc_alloc_region.init(); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4372 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
|
4373 _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
|
4374 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4375 // 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
|
4376 // 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
|
4377 // 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
|
4378 // 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
|
4379 // 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
|
4380 // 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
|
4381 // during a cleanup and was added to the free list, but |
10405 | 4382 // 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
|
4383 // 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
|
4384 if (retained_region != NULL && |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4385 !retained_region->in_collection_set() && |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4386 !(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
|
4387 !retained_region->is_empty() && |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4388 !retained_region->isHumongous()) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4389 retained_region->set_saved_mark(); |
4072 | 4390 // The retained region was added to the old region set when it was |
4391 // retired. We have to remove it now, since we don't allow regions | |
4392 // we allocate to in the region sets. We'll re-add it later, when | |
4393 // it's retired again. | |
4394 _old_set.remove(retained_region); | |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4395 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
|
4396 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
|
4397 _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
|
4398 _hr_printer.reuse(retained_region); |
10405 | 4399 evacuation_info.set_alloc_regions_used_before(retained_region->used()); |
4400 } | |
4401 } | |
4402 | |
4403 void G1CollectedHeap::release_gc_alloc_regions(uint no_of_gc_workers, EvacuationInfo& evacuation_info) { | |
4404 evacuation_info.set_allocation_regions(_survivor_gc_alloc_region.count() + | |
4405 _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
|
4406 _survivor_gc_alloc_region.release(); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4407 // 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
|
4408 // _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
|
4409 // _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
|
4410 // 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
|
4411 // condition. |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4412 _retained_old_gc_alloc_region = _old_gc_alloc_region.release(); |
6595 | 4413 |
4414 if (ResizePLAB) { | |
6819 | 4415 _survivor_plab_stats.adjust_desired_plab_sz(no_of_gc_workers); |
4416 _old_plab_stats.adjust_desired_plab_sz(no_of_gc_workers); | |
6595 | 4417 } |
342 | 4418 } |
4419 | |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4420 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
|
4421 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
|
4422 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
|
4423 _retained_old_gc_alloc_region = NULL; |
342 | 4424 } |
4425 | |
4426 void G1CollectedHeap::init_for_evac_failure(OopsInHeapRegionClosure* cl) { | |
4427 _drain_in_progress = false; | |
4428 set_evac_failure_closure(cl); | |
6197 | 4429 _evac_failure_scan_stack = new (ResourceObj::C_HEAP, mtGC) GrowableArray<oop>(40, true); |
342 | 4430 } |
4431 | |
4432 void G1CollectedHeap::finalize_for_evac_failure() { | |
4433 assert(_evac_failure_scan_stack != NULL && | |
4434 _evac_failure_scan_stack->length() == 0, | |
4435 "Postcondition"); | |
4436 assert(!_drain_in_progress, "Postcondition"); | |
1045 | 4437 delete _evac_failure_scan_stack; |
342 | 4438 _evac_failure_scan_stack = NULL; |
4439 } | |
4440 | |
4441 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
|
4442 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
|
4443 |
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4444 double remove_self_forwards_start = os::elapsedTime(); |
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4445 |
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4446 G1ParRemoveSelfForwardPtrsTask rsfp_task(this); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4447 |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4448 if (G1CollectedHeap::use_parallel_gc_threads()) { |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4449 set_par_threads(); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4450 workers()->run_task(&rsfp_task); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4451 set_par_threads(0); |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
4452 } else { |
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4453 rsfp_task.work(0); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4454 } |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4455 |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4456 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
|
4457 |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4458 // 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
|
4459 reset_cset_heap_region_claim_values(); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4460 |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4461 assert(check_cset_heap_region_claim_values(HeapRegion::InitialClaimValue), "sanity"); |
342 | 4462 |
4463 // 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
|
4464 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
|
4465 _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
|
4466 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
|
4467 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
|
4468 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
|
4469 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
|
4470 } |
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4471 _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
|
4472 _preserved_marks_of_objs.clear(true); |
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4473 |
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4474 g1_policy()->phase_times()->record_evac_fail_remove_self_forwards((os::elapsedTime() - remove_self_forwards_start) * 1000.0); |
342 | 4475 } |
4476 | |
4477 void G1CollectedHeap::push_on_evac_failure_scan_stack(oop obj) { | |
4478 _evac_failure_scan_stack->push(obj); | |
4479 } | |
4480 | |
4481 void G1CollectedHeap::drain_evac_failure_scan_stack() { | |
4482 assert(_evac_failure_scan_stack != NULL, "precondition"); | |
4483 | |
4484 while (_evac_failure_scan_stack->length() > 0) { | |
4485 oop obj = _evac_failure_scan_stack->pop(); | |
4486 _evac_failure_closure->set_region(heap_region_containing(obj)); | |
4487 obj->oop_iterate_backwards(_evac_failure_closure); | |
4488 } | |
4489 } | |
4490 | |
4491 oop | |
10405 | 4492 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
|
4493 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
|
4494 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
|
4495 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
|
4496 (HeapWord*) old)); |
342 | 4497 markOop m = old->mark(); |
4498 oop forward_ptr = old->forward_to_atomic(old); | |
4499 if (forward_ptr == NULL) { | |
4500 // Forward-to-self succeeded. | |
10405 | 4501 assert(_par_scan_state != NULL, "par scan state"); |
4502 OopsInHeapRegionClosure* cl = _par_scan_state->evac_failure_closure(); | |
4503 uint queue_num = _par_scan_state->queue_num(); | |
4504 | |
4505 _evacuation_failed = true; | |
4506 _evacuation_failed_info_array[queue_num].register_copy_failure(old->size()); | |
342 | 4507 if (_evac_failure_closure != cl) { |
4508 MutexLockerEx x(EvacFailureStack_lock, Mutex::_no_safepoint_check_flag); | |
4509 assert(!_drain_in_progress, | |
4510 "Should only be true while someone holds the lock."); | |
4511 // Set the global evac-failure closure to the current thread's. | |
4512 assert(_evac_failure_closure == NULL, "Or locking has failed."); | |
4513 set_evac_failure_closure(cl); | |
4514 // Now do the common part. | |
4515 handle_evacuation_failure_common(old, m); | |
4516 // Reset to NULL. | |
4517 set_evac_failure_closure(NULL); | |
4518 } else { | |
4519 // The lock is already held, and this is recursive. | |
4520 assert(_drain_in_progress, "This should only be the recursive case."); | |
4521 handle_evacuation_failure_common(old, m); | |
4522 } | |
4523 return old; | |
4524 } 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
|
4525 // 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
|
4526 // 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
|
4527 // 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
|
4528 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
|
4529 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
|
4530 "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
|
4531 (HeapWord*) old, (HeapWord*) forward_ptr)); |
342 | 4532 return forward_ptr; |
4533 } | |
4534 } | |
4535 | |
4536 void G1CollectedHeap::handle_evacuation_failure_common(oop old, markOop m) { | |
4537 preserve_mark_if_necessary(old, m); | |
4538 | |
4539 HeapRegion* r = heap_region_containing(old); | |
4540 if (!r->evacuation_failed()) { | |
4541 r->set_evacuation_failed(true); | |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4542 _hr_printer.evac_failure(r); |
342 | 4543 } |
4544 | |
4545 push_on_evac_failure_scan_stack(old); | |
4546 | |
4547 if (!_drain_in_progress) { | |
4548 // prevent recursion in copy_to_survivor_space() | |
4549 _drain_in_progress = true; | |
4550 drain_evac_failure_scan_stack(); | |
4551 _drain_in_progress = false; | |
4552 } | |
4553 } | |
4554 | |
4555 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
|
4556 assert(evacuation_failed(), "Oversaving!"); |
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4557 // 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
|
4558 // case of a promotion failure. |
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4559 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
|
4560 _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
|
4561 _preserved_marks_of_objs.push(m); |
342 | 4562 } |
4563 } | |
4564 | |
4565 HeapWord* G1CollectedHeap::par_allocate_during_gc(GCAllocPurpose purpose, | |
4566 size_t word_size) { | |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4567 if (purpose == GCAllocForSurvived) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4568 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
|
4569 if (result != NULL) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4570 return result; |
342 | 4571 } else { |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4572 // 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
|
4573 // object there. |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4574 return old_attempt_allocation(word_size); |
342 | 4575 } |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4576 } else { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4577 assert(purpose == GCAllocForTenured, "sanity"); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4578 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
|
4579 if (result != NULL) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4580 return result; |
342 | 4581 } else { |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4582 // 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
|
4583 // object there. |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4584 return survivor_attempt_allocation(word_size); |
342 | 4585 } |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4586 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4587 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4588 ShouldNotReachHere(); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4589 // 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
|
4590 return NULL; |
342 | 4591 } |
4592 | |
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4593 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
|
4594 ParGCAllocBuffer(gclab_word_size), _retired(false) { } |
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4595 |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4596 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
|
4597 : _g1h(g1h), |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4598 _refs(g1h->task_queue(queue_num)), |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4599 _dcq(&g1h->dirty_card_queue_set()), |
12343 | 4600 _ct_bs(g1h->g1_barrier_set()), |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4601 _g1_rem(g1h->g1_rem_set()), |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4602 _hash_seed(17), _queue_num(queue_num), |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4603 _term_attempts(0), |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4604 _surviving_alloc_buffer(g1h->desired_plab_sz(GCAllocForSurvived)), |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4605 _tenured_alloc_buffer(g1h->desired_plab_sz(GCAllocForTenured)), |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4606 _age_table(false), _scanner(g1h, this, rp), |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4607 _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
|
4608 _alloc_buffer_waste(0), _undo_waste(0) { |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4609 // we allocate G1YoungSurvRateNumRegions plus one entries, since |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4610 // 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
|
4611 // non-young regions (where the age is -1) |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4612 // 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
|
4613 // an attempt to eliminate cache contention |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4614 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
|
4615 uint array_length = PADDING_ELEM_NUM + |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4616 real_length + |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4617 PADDING_ELEM_NUM; |
6197 | 4618 _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
|
4619 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
|
4620 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
|
4621 "Not enough space for young surv histo."); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4622 _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
|
4623 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
|
4624 |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4625 _alloc_buffers[GCAllocForSurvived] = &_surviving_alloc_buffer; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4626 _alloc_buffers[GCAllocForTenured] = &_tenured_alloc_buffer; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4627 |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4628 _start = os::elapsedTime(); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4629 } |
342 | 4630 |
1709 | 4631 void |
4632 G1ParScanThreadState::print_termination_stats_hdr(outputStream* const st) | |
4633 { | |
4634 st->print_raw_cr("GC Termination Stats"); | |
4635 st->print_raw_cr(" elapsed --strong roots-- -------termination-------" | |
4636 " ------waste (KiB)------"); | |
4637 st->print_raw_cr("thr ms ms % ms % attempts" | |
4638 " total alloc undo"); | |
4639 st->print_raw_cr("--- --------- --------- ------ --------- ------ --------" | |
4640 " ------- ------- -------"); | |
4641 } | |
4642 | |
4643 void | |
4644 G1ParScanThreadState::print_termination_stats(int i, | |
4645 outputStream* const st) const | |
4646 { | |
4647 const double elapsed_ms = elapsed_time() * 1000.0; | |
4648 const double s_roots_ms = strong_roots_time() * 1000.0; | |
4649 const double term_ms = term_time() * 1000.0; | |
4650 st->print_cr("%3d %9.2f %9.2f %6.2f " | |
4651 "%9.2f %6.2f " SIZE_FORMAT_W(8) " " | |
4652 SIZE_FORMAT_W(7) " " SIZE_FORMAT_W(7) " " SIZE_FORMAT_W(7), | |
4653 i, elapsed_ms, s_roots_ms, s_roots_ms * 100 / elapsed_ms, | |
4654 term_ms, term_ms * 100 / elapsed_ms, term_attempts(), | |
4655 (alloc_buffer_waste() + undo_waste()) * HeapWordSize / K, | |
4656 alloc_buffer_waste() * HeapWordSize / K, | |
4657 undo_waste() * HeapWordSize / K); | |
4658 } | |
4659 | |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4660 #ifdef ASSERT |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4661 bool G1ParScanThreadState::verify_ref(narrowOop* ref) const { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4662 assert(ref != NULL, "invariant"); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4663 assert(UseCompressedOops, "sanity"); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4664 assert(!has_partial_array_mask(ref), err_msg("ref=" PTR_FORMAT, ref)); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4665 oop p = oopDesc::load_decode_heap_oop(ref); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4666 assert(_g1h->is_in_g1_reserved(p), |
12316
190899198332
7195622: CheckUnhandledOops has limited usefulness now
hseigel
parents:
12233
diff
changeset
|
4667 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, (void *)p)); |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4668 return true; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4669 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4670 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4671 bool G1ParScanThreadState::verify_ref(oop* ref) const { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4672 assert(ref != NULL, "invariant"); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4673 if (has_partial_array_mask(ref)) { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4674 // Must be in the collection set--it's already been copied. |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4675 oop p = clear_partial_array_mask(ref); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4676 assert(_g1h->obj_in_cs(p), |
12316
190899198332
7195622: CheckUnhandledOops has limited usefulness now
hseigel
parents:
12233
diff
changeset
|
4677 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, (void *)p)); |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4678 } else { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4679 oop p = oopDesc::load_decode_heap_oop(ref); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4680 assert(_g1h->is_in_g1_reserved(p), |
12316
190899198332
7195622: CheckUnhandledOops has limited usefulness now
hseigel
parents:
12233
diff
changeset
|
4681 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, (void *)p)); |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4682 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4683 return true; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4684 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4685 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4686 bool G1ParScanThreadState::verify_task(StarTask ref) const { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4687 if (ref.is_narrow()) { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4688 return verify_ref((narrowOop*) ref); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4689 } else { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4690 return verify_ref((oop*) ref); |
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 #endif // ASSERT |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4694 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4695 void G1ParScanThreadState::trim_queue() { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4696 assert(_evac_failure_cl != NULL, "not set"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4697 |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4698 StarTask ref; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4699 do { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4700 // Drain the overflow stack first, so other threads can steal. |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4701 while (refs()->pop_overflow(ref)) { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4702 deal_with_reference(ref); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4703 } |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4704 |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4705 while (refs()->pop_local(ref)) { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4706 deal_with_reference(ref); |
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 } while (!refs()->is_empty()); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4709 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4710 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4711 G1ParClosureSuper::G1ParClosureSuper(G1CollectedHeap* g1, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4712 G1ParScanThreadState* par_scan_state) : |
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4713 _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
|
4714 _worker_id(par_scan_state->queue_num()) { } |
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4715 |
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4716 void G1ParCopyHelper::mark_object(oop obj) { |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4717 #ifdef ASSERT |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4718 HeapRegion* hr = _g1->heap_region_containing(obj); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4719 assert(hr != NULL, "sanity"); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4720 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
|
4721 #endif // ASSERT |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4722 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4723 // 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
|
4724 _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
|
4725 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4726 |
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4727 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
|
4728 #ifdef ASSERT |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4729 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
|
4730 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
|
4731 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
|
4732 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4733 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
|
4734 assert(from_hr != NULL, "sanity"); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4735 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
|
4736 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4737 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
|
4738 assert(to_hr != NULL, "sanity"); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4739 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
|
4740 #endif // ASSERT |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4741 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4742 // 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
|
4743 // 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
|
4744 // 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
|
4745 // image which we know should not be changing. |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4746 _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
|
4747 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4748 |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4749 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
|
4750 size_t word_sz = old->size(); |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4751 HeapRegion* from_region = _g1h->heap_region_containing_raw(old); |
342 | 4752 // +1 to make the -1 indexes valid... |
4753 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
|
4754 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
|
4755 (!from_region->is_young() && young_index == 0), "invariant" ); |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4756 G1CollectorPolicy* g1p = _g1h->g1_policy(); |
342 | 4757 markOop m = old->mark(); |
545 | 4758 int age = m->has_displaced_mark_helper() ? m->displaced_mark_helper()->age() |
4759 : m->age(); | |
4760 GCAllocPurpose alloc_purpose = g1p->evacuation_destination(from_region, age, | |
342 | 4761 word_sz); |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4762 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
|
4763 #ifndef PRODUCT |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4764 // Should this evacuation fail? |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4765 if (_g1h->evacuation_should_fail()) { |
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4766 if (obj_ptr != NULL) { |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4767 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
|
4768 obj_ptr = NULL; |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4769 } |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4770 } |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4771 #endif // !PRODUCT |
342 | 4772 |
4773 if (obj_ptr == NULL) { | |
4774 // This will either forward-to-self, or detect that someone else has | |
4775 // installed a forwarding pointer. | |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4776 return _g1h->handle_evacuation_failure_par(this, old); |
342 | 4777 } |
4778 | |
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4779 oop obj = oop(obj_ptr); |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4780 |
526 | 4781 // We're going to allocate linearly, so might as well prefetch ahead. |
4782 Prefetch::write(obj_ptr, PrefetchCopyIntervalInBytes); | |
4783 | |
342 | 4784 oop forward_ptr = old->forward_to_atomic(obj); |
4785 if (forward_ptr == NULL) { | |
4786 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
|
4787 |
b7e42ada4898
8036672: G1: alloc_purpose in copy_to_survivor_space() used incorrectly
pliden
parents:
17748
diff
changeset
|
4788 // 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
|
4789 // 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
|
4790 HeapRegion* to_region = _g1h->heap_region_containing_raw(obj_ptr); |
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8036672: G1: alloc_purpose in copy_to_survivor_space() used incorrectly
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parents:
17748
diff
changeset
|
4791 alloc_purpose = to_region->is_young() ? GCAllocForSurvived : GCAllocForTenured; |
b7e42ada4898
8036672: G1: alloc_purpose in copy_to_survivor_space() used incorrectly
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parents:
17748
diff
changeset
|
4792 |
526 | 4793 if (g1p->track_object_age(alloc_purpose)) { |
4794 // We could simply do obj->incr_age(). However, this causes a | |
4795 // performance issue. obj->incr_age() will first check whether | |
4796 // the object has a displaced mark by checking its mark word; | |
4797 // getting the mark word from the new location of the object | |
4798 // stalls. So, given that we already have the mark word and we | |
4799 // are about to install it anyway, it's better to increase the | |
4800 // age on the mark word, when the object does not have a | |
4801 // displaced mark word. We're not expecting many objects to have | |
4802 // a displaced marked word, so that case is not optimized | |
4803 // further (it could be...) and we simply call obj->incr_age(). | |
4804 | |
4805 if (m->has_displaced_mark_helper()) { | |
4806 // in this case, we have to install the mark word first, | |
4807 // otherwise obj looks to be forwarded (the old mark word, | |
4808 // which contains the forward pointer, was copied) | |
4809 obj->set_mark(m); | |
4810 obj->incr_age(); | |
4811 } else { | |
4812 m = m->incr_age(); | |
545 | 4813 obj->set_mark(m); |
526 | 4814 } |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4815 age_table()->add(obj, word_sz); |
545 | 4816 } else { |
4817 obj->set_mark(m); | |
526 | 4818 } |
4819 | |
17764 | 4820 if (G1StringDedup::is_enabled()) { |
4821 G1StringDedup::enqueue_from_evacuation(from_region->is_young(), | |
4822 to_region->is_young(), | |
4823 queue_num(), | |
4824 obj); | |
4825 } | |
4826 | |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4827 size_t* surv_young_words = surviving_young_words(); |
342 | 4828 surv_young_words[young_index] += word_sz; |
4829 | |
4830 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
|
4831 // 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
|
4832 // 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
|
4833 // 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
|
4834 arrayOop(obj)->set_length(0); |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4835 oop* old_p = set_partial_array_mask(old); |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4836 push_on_queue(old_p); |
342 | 4837 } else { |
526 | 4838 // No point in using the slower heap_region_containing() method, |
4839 // 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
|
4840 _scanner.set_region(_g1h->heap_region_containing_raw(obj)); |
5987 | 4841 obj->oop_iterate_backwards(&_scanner); |
342 | 4842 } |
4843 } else { | |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4844 undo_allocation(alloc_purpose, obj_ptr, word_sz); |
342 | 4845 obj = forward_ptr; |
4846 } | |
4847 return obj; | |
4848 } | |
4849 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
changeset
|
4850 template <class T> |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
4851 void G1ParCopyHelper::do_klass_barrier(T* p, oop new_obj) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
4852 if (_g1->heap_region_containing_raw(new_obj)->is_young()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
4853 _scanned_klass->record_modified_oops(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
4854 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
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diff
changeset
|
4855 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
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diff
changeset
|
4856 |
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4857 template <G1Barrier barrier, bool do_mark_object> |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4858 template <class T> |
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4859 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
|
4860 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
|
4861 |
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4862 if (oopDesc::is_null(heap_oop)) { |
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4863 return; |
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4864 } |
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4865 |
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4866 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
|
4867 |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4868 assert(_worker_id == _par_scan_state->queue_num(), "sanity"); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4869 |
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
4870 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
|
4871 oop forwardee; |
526 | 4872 if (obj->is_forwarded()) { |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4873 forwardee = obj->forwardee(); |
526 | 4874 } else { |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4875 forwardee = _par_scan_state->copy_to_survivor_space(obj); |
342 | 4876 } |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4877 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
|
4878 oopDesc::encode_store_heap_oop(p, forwardee); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4879 if (do_mark_object && forwardee != obj) { |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4880 // 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
|
4881 // 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
|
4882 mark_forwarded_object(obj, forwardee); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4883 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4884 |
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4885 if (barrier == G1BarrierKlass) { |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4886 do_klass_barrier(p, forwardee); |
342 | 4887 } |
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4888 } else { |
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4889 // 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
|
4890 // 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
|
4891 // 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
|
4892 if (do_mark_object) { |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4893 mark_object(obj); |
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4894 } |
526 | 4895 } |
4896 | |
17688
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4897 if (barrier == G1BarrierEvac) { |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4898 _par_scan_state->update_rs(_from, p, _worker_id); |
526 | 4899 } |
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4900 } |
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4901 |
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4902 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
|
4903 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
|
4904 |
342 | 4905 class G1ParEvacuateFollowersClosure : public VoidClosure { |
4906 protected: | |
4907 G1CollectedHeap* _g1h; | |
4908 G1ParScanThreadState* _par_scan_state; | |
4909 RefToScanQueueSet* _queues; | |
4910 ParallelTaskTerminator* _terminator; | |
4911 | |
4912 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } | |
4913 RefToScanQueueSet* queues() { return _queues; } | |
4914 ParallelTaskTerminator* terminator() { return _terminator; } | |
4915 | |
4916 public: | |
4917 G1ParEvacuateFollowersClosure(G1CollectedHeap* g1h, | |
4918 G1ParScanThreadState* par_scan_state, | |
4919 RefToScanQueueSet* queues, | |
4920 ParallelTaskTerminator* terminator) | |
4921 : _g1h(g1h), _par_scan_state(par_scan_state), | |
4922 _queues(queues), _terminator(terminator) {} | |
4923 | |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4924 void do_void(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4925 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4926 private: |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4927 inline bool offer_termination(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4928 }; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4929 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4930 bool G1ParEvacuateFollowersClosure::offer_termination() { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4931 G1ParScanThreadState* const pss = par_scan_state(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4932 pss->start_term_time(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4933 const bool res = terminator()->offer_termination(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4934 pss->end_term_time(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4935 return res; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4936 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4937 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4938 void G1ParEvacuateFollowersClosure::do_void() { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4939 StarTask stolen_task; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4940 G1ParScanThreadState* const pss = par_scan_state(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4941 pss->trim_queue(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4942 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4943 do { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4944 while (queues()->steal(pss->queue_num(), pss->hash_seed(), stolen_task)) { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4945 assert(pss->verify_task(stolen_task), "sanity"); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4946 if (stolen_task.is_narrow()) { |
1883
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
1862
diff
changeset
|
4947 pss->deal_with_reference((narrowOop*) stolen_task); |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4948 } else { |
1883
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
1862
diff
changeset
|
4949 pss->deal_with_reference((oop*) stolen_task); |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4950 } |
1883
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
1862
diff
changeset
|
4951 |
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
1862
diff
changeset
|
4952 // We've just processed a reference and we might have made |
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
1862
diff
changeset
|
4953 // available new entries on the queues. So we have to make sure |
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
1862
diff
changeset
|
4954 // we drain the queues as necessary. |
342 | 4955 pss->trim_queue(); |
4956 } | |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4957 } while (!offer_termination()); |
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 pss->retire_alloc_buffers(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4960 } |
342 | 4961 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4962 class G1KlassScanClosure : public KlassClosure { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4963 G1ParCopyHelper* _closure; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
changeset
|
4964 bool _process_only_dirty; |
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4965 int _count; |
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4966 public: |
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4967 G1KlassScanClosure(G1ParCopyHelper* closure, bool process_only_dirty) |
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4968 : _process_only_dirty(process_only_dirty), _closure(closure), _count(0) {} |
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4969 void do_klass(Klass* klass) { |
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4970 // If the klass has not been dirtied we know that there's |
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4971 // no references into the young gen and we can skip it. |
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4972 if (!_process_only_dirty || klass->has_modified_oops()) { |
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4973 // Clean the klass since we're going to scavenge all the metadata. |
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4974 klass->clear_modified_oops(); |
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4975 |
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4976 // Tell the closure that this klass is the Klass to scavenge |
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4977 // and is the one to dirty if oops are left pointing into the young gen. |
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4978 _closure->set_scanned_klass(klass); |
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4979 |
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4980 klass->oops_do(_closure); |
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4981 |
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4982 _closure->set_scanned_klass(NULL); |
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4983 } |
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4984 _count++; |
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4985 } |
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4986 }; |
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4987 |
342 | 4988 class G1ParTask : public AbstractGangTask { |
4989 protected: | |
4990 G1CollectedHeap* _g1h; | |
4991 RefToScanQueueSet *_queues; | |
4992 ParallelTaskTerminator _terminator; | |
4728
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4993 uint _n_workers; |
342 | 4994 |
4995 Mutex _stats_lock; | |
4996 Mutex* stats_lock() { return &_stats_lock; } | |
4997 | |
4998 size_t getNCards() { | |
4999 return (_g1h->capacity() + G1BlockOffsetSharedArray::N_bytes - 1) | |
5000 / G1BlockOffsetSharedArray::N_bytes; | |
5001 } | |
5002 | |
5003 public: | |
4095
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5004 G1ParTask(G1CollectedHeap* g1h, |
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5005 RefToScanQueueSet *task_queues) |
342 | 5006 : AbstractGangTask("G1 collection"), |
5007 _g1h(g1h), | |
5008 _queues(task_queues), | |
4095
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5009 _terminator(0, _queues), |
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5010 _stats_lock(Mutex::leaf, "parallel G1 stats lock", true) |
342 | 5011 {} |
5012 | |
5013 RefToScanQueueSet* queues() { return _queues; } | |
5014 | |
5015 RefToScanQueue *work_queue(int i) { | |
5016 return queues()->queue(i); | |
5017 } | |
5018 | |
4095
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5019 ParallelTaskTerminator* terminator() { return &_terminator; } |
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5020 |
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5021 virtual void set_for_termination(int active_workers) { |
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5022 // This task calls set_n_termination() in par_non_clean_card_iterate_work() |
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5023 // in the young space (_par_seq_tasks) in the G1 heap |
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5024 // for SequentialSubTasksDone. |
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5025 // This task also uses SubTasksDone in SharedHeap and G1CollectedHeap |
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5026 // both of which need setting by set_n_termination(). |
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|
5027 _g1h->SharedHeap::set_n_termination(active_workers); |
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5028 _g1h->set_n_termination(active_workers); |
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5029 terminator()->reset_for_reuse(active_workers); |
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|
5030 _n_workers = active_workers; |
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|
5031 } |
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|
5032 |
4728
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|
5033 void work(uint worker_id) { |
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|
5034 if (worker_id >= _n_workers) return; // no work needed this round |
1611 | 5035 |
5036 double start_time_ms = os::elapsedTime() * 1000.0; | |
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5037 _g1h->g1_policy()->phase_times()->record_gc_worker_start_time(worker_id, start_time_ms); |
1611 | 5038 |
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|
5039 { |
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|
5040 ResourceMark rm; |
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|
5041 HandleMark hm; |
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|
5042 |
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|
5043 ReferenceProcessor* rp = _g1h->ref_processor_stw(); |
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5044 |
17689
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5045 G1ParScanThreadState pss(_g1h, worker_id, rp); |
5986
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5046 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, rp); |
17759
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5047 |
5986
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|
5048 pss.set_evac_failure_closure(&evac_failure_cl); |
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|
5049 |
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|
5050 G1ParScanExtRootClosure only_scan_root_cl(_g1h, &pss, rp); |
6725
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5051 G1ParScanMetadataClosure only_scan_metadata_cl(_g1h, &pss, rp); |
5986
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|
5052 |
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|
5053 G1ParScanAndMarkExtRootClosure scan_mark_root_cl(_g1h, &pss, rp); |
6725
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5054 G1ParScanAndMarkMetadataClosure scan_mark_metadata_cl(_g1h, &pss, rp); |
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5055 |
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5056 bool only_young = _g1h->g1_policy()->gcs_are_young(); |
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5057 G1KlassScanClosure scan_mark_klasses_cl_s(&scan_mark_metadata_cl, false); |
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|
5058 G1KlassScanClosure only_scan_klasses_cl_s(&only_scan_metadata_cl, only_young); |
5986
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|
5059 |
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|
5060 OopClosure* scan_root_cl = &only_scan_root_cl; |
6725
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5061 G1KlassScanClosure* scan_klasses_cl = &only_scan_klasses_cl_s; |
5986
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|
5062 |
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|
5063 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
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|
5064 // We also need to mark copied objects. |
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|
5065 scan_root_cl = &scan_mark_root_cl; |
6725
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5066 scan_klasses_cl = &scan_mark_klasses_cl_s; |
5986
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|
5067 } |
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|
5068 |
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|
5069 G1ParPushHeapRSClosure push_heap_rs_cl(_g1h, &pss); |
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|
5070 |
12080 | 5071 // Don't scan the scavengable methods in the code cache as part |
5072 // of strong root scanning. The code roots that point into a | |
5073 // region in the collection set are scanned when we scan the | |
5074 // region's RSet. | |
5075 int so = SharedHeap::SO_AllClasses | SharedHeap::SO_Strings; | |
6725
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|
5076 |
5986
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|
5077 pss.start_strong_roots(); |
6725
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|
5078 _g1h->g1_process_strong_roots(/* is scavenging */ true, |
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|
5079 SharedHeap::ScanningOption(so), |
5986
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|
5080 scan_root_cl, |
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|
5081 &push_heap_rs_cl, |
6725
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|
5082 scan_klasses_cl, |
5986
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|
5083 worker_id); |
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|
5084 pss.end_strong_roots(); |
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|
5085 |
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|
5086 { |
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|
5087 double start = os::elapsedTime(); |
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|
5088 G1ParEvacuateFollowersClosure evac(_g1h, &pss, _queues, &_terminator); |
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|
5089 evac.do_void(); |
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|
5090 double elapsed_ms = (os::elapsedTime()-start)*1000.0; |
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|
5091 double term_ms = pss.term_time()*1000.0; |
6628
bb3f6194fedb
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|
5092 _g1h->g1_policy()->phase_times()->add_obj_copy_time(worker_id, elapsed_ms-term_ms); |
6219
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|
5093 _g1h->g1_policy()->phase_times()->record_termination(worker_id, term_ms, pss.term_attempts()); |
5986
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|
5094 } |
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|
5095 _g1h->g1_policy()->record_thread_age_table(pss.age_table()); |
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|
5096 _g1h->update_surviving_young_words(pss.surviving_young_words()+1); |
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|
5097 |
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|
5098 if (ParallelGCVerbose) { |
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|
5099 MutexLocker x(stats_lock()); |
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|
5100 pss.print_termination_stats(worker_id); |
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|
5101 } |
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|
5102 |
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|
5103 assert(pss.refs()->is_empty(), "should be empty"); |
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|
5104 |
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|
5105 // Close the inner scope so that the ResourceMark and HandleMark |
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|
5106 // destructors are executed here and are included as part of the |
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|
5107 // "GC Worker Time". |
342 | 5108 } |
5109 | |
1611 | 5110 double end_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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|
5111 _g1h->g1_policy()->phase_times()->record_gc_worker_end_time(worker_id, end_time_ms); |
342 | 5112 } |
5113 }; | |
5114 | |
5115 // *** Common G1 Evacuation Stuff | |
5116 | |
1833
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6984287: Regularize how GC parallel workers are specified.
jmasa
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|
5117 // This method is run in a GC worker. |
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|
5118 |
342 | 5119 void |
5120 G1CollectedHeap:: | |
6725
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5121 g1_process_strong_roots(bool is_scavenging, |
4910
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7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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|
5122 ScanningOption so, |
342 | 5123 OopClosure* scan_non_heap_roots, |
5124 OopsInHeapRegionClosure* scan_rs, | |
6725
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5125 G1KlassScanClosure* scan_klasses, |
17844
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8016302: Change type of the number of GC workers to unsigned int (2)
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17833
diff
changeset
|
5126 uint worker_i) { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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|
5127 |
6725
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5128 // First scan the strong roots |
342 | 5129 double ext_roots_start = os::elapsedTime(); |
5130 double closure_app_time_sec = 0.0; | |
5131 | |
5132 BufferingOopClosure buf_scan_non_heap_roots(scan_non_heap_roots); | |
5133 | |
12080 | 5134 assert(so & SO_CodeCache || scan_rs != NULL, "must scan code roots somehow"); |
5135 // Walk the code cache/strong code roots w/o buffering, because StarTask | |
5136 // cannot handle unaligned oop locations. | |
5137 CodeBlobToOopClosure eager_scan_code_roots(scan_non_heap_roots, true /* do_marking */); | |
989
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|
5138 |
148e5441d916
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|
5139 process_strong_roots(false, // no scoping; this is parallel code |
6725
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|
5140 is_scavenging, so, |
342 | 5141 &buf_scan_non_heap_roots, |
989
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|
5142 &eager_scan_code_roots, |
6725
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|
5143 scan_klasses |
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|
5144 ); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
5145 |
3979
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6484982: G1: process references during evacuation pauses
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|
5146 // Now the CM ref_processor roots. |
3823
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parents:
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|
5147 if (!_process_strong_tasks->is_task_claimed(G1H_PS_refProcessor_oops_do)) { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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|
5148 // We need to treat the discovered reference lists of the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5149 // concurrent mark ref processor as roots and keep entries |
4dfb2df418f2
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|
5150 // (which are added by the marking threads) on them live |
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|
5151 // until they can be processed at the end of marking. |
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|
5152 ref_processor_cm()->weak_oops_do(&buf_scan_non_heap_roots); |
3823
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|
5153 } |
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|
5154 |
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changeset
|
5155 // Finish up any enqueued closure apps (attributed as object copy time). |
342 | 5156 buf_scan_non_heap_roots.done(); |
6725
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|
5157 |
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|
5158 double obj_copy_time_sec = buf_scan_non_heap_roots.closure_app_seconds(); |
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|
5159 |
6219
922993931b3d
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changeset
|
5160 g1_policy()->phase_times()->record_obj_copy_time(worker_i, obj_copy_time_sec * 1000.0); |
3823
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diff
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|
5161 |
342 | 5162 double ext_root_time_ms = |
6628
bb3f6194fedb
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changeset
|
5163 ((os::elapsedTime() - ext_roots_start) - obj_copy_time_sec) * 1000.0; |
3823
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|
5164 |
6219
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changeset
|
5165 g1_policy()->phase_times()->record_ext_root_scan_time(worker_i, ext_root_time_ms); |
342 | 5166 |
4787
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diff
changeset
|
5167 // During conc marking we have to filter the per-thread SATB buffers |
2ace1c4ee8da
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changeset
|
5168 // to make sure we remove any oops into the CSet (which will show up |
2ace1c4ee8da
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|
5169 // as implicitly live). |
6628
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|
5170 double satb_filtering_ms = 0.0; |
4787
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|
5171 if (!_process_strong_tasks->is_task_claimed(G1H_PS_filter_satb_buffers)) { |
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|
5172 if (mark_in_progress()) { |
6628
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brutisso
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|
5173 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
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diff
changeset
|
5174 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
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changeset
|
5175 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
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changeset
|
5176 |
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
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diff
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|
5177 satb_filtering_ms = (os::elapsedTime() - satb_filter_start) * 1000.0; |
4787
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|
5178 } |
2ace1c4ee8da
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changeset
|
5179 } |
6219
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|
5180 g1_policy()->phase_times()->record_satb_filtering_time(worker_i, satb_filtering_ms); |
342 | 5181 |
12080 | 5182 // If this is an initial mark pause, and we're not scanning |
5183 // the entire code cache, we need to mark the oops in the | |
5184 // strong code root lists for the regions that are not in | |
5185 // the collection set. | |
5186 // Note all threads participate in this set of root tasks. | |
5187 double mark_strong_code_roots_ms = 0.0; | |
5188 if (g1_policy()->during_initial_mark_pause() && !(so & SO_CodeCache)) { | |
5189 double mark_strong_roots_start = os::elapsedTime(); | |
5190 mark_strong_code_roots(worker_i); | |
5191 mark_strong_code_roots_ms = (os::elapsedTime() - mark_strong_roots_start) * 1000.0; | |
5192 } | |
5193 g1_policy()->phase_times()->record_strong_code_root_mark_time(worker_i, mark_strong_code_roots_ms); | |
5194 | |
342 | 5195 // Now scan the complement of the collection set. |
5196 if (scan_rs != NULL) { | |
12080 | 5197 g1_rem_set()->oops_into_collection_set_do(scan_rs, &eager_scan_code_roots, worker_i); |
342 | 5198 } |
5199 _process_strong_tasks->all_tasks_completed(); | |
5200 } | |
5201 | |
5202 void | |
10179
a08c80e9e1e5
8012687: Remove unused is_root checks and closures
stefank
parents:
10099
diff
changeset
|
5203 G1CollectedHeap::g1_process_weak_roots(OopClosure* root_closure) { |
989
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6863023: need non-perm oops in code cache for JSR 292
jrose
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diff
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|
5204 CodeBlobToOopClosure roots_in_blobs(root_closure, /*do_marking=*/ false); |
10179
a08c80e9e1e5
8012687: Remove unused is_root checks and closures
stefank
parents:
10099
diff
changeset
|
5205 SharedHeap::process_weak_roots(root_closure, &roots_in_blobs); |
342 | 5206 } |
5207 | |
17634
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8027476: Improve performance of Stringtable unlink
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diff
changeset
|
5208 class G1StringSymbolTableUnlinkTask : public AbstractGangTask { |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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changeset
|
5209 private: |
5a32d2a3cc1e
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changeset
|
5210 BoolObjectClosure* _is_alive; |
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8027476: Improve performance of Stringtable unlink
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diff
changeset
|
5211 int _initial_string_table_size; |
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diff
changeset
|
5212 int _initial_symbol_table_size; |
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8027476: Improve performance of Stringtable unlink
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changeset
|
5213 |
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8027476: Improve performance of Stringtable unlink
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diff
changeset
|
5214 bool _process_strings; |
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8027476: Improve performance of Stringtable unlink
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changeset
|
5215 int _strings_processed; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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diff
changeset
|
5216 int _strings_removed; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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diff
changeset
|
5217 |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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diff
changeset
|
5218 bool _process_symbols; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5219 int _symbols_processed; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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parents:
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diff
changeset
|
5220 int _symbols_removed; |
17652
0eb64cfc0b76
8033443: Test8000311 fails after latest changes to parallelize string and symbol table unlink
tschatzl
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17651
diff
changeset
|
5221 |
0eb64cfc0b76
8033443: Test8000311 fails after latest changes to parallelize string and symbol table unlink
tschatzl
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diff
changeset
|
5222 bool _do_in_parallel; |
17634
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8027476: Improve performance of Stringtable unlink
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changeset
|
5223 public: |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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changeset
|
5224 G1StringSymbolTableUnlinkTask(BoolObjectClosure* is_alive, bool process_strings, bool process_symbols) : |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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diff
changeset
|
5225 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
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diff
changeset
|
5226 _do_in_parallel(G1CollectedHeap::use_parallel_gc_threads()), |
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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diff
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|
5227 _process_strings(process_strings), _strings_processed(0), _strings_removed(0), |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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diff
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|
5228 _process_symbols(process_symbols), _symbols_processed(0), _symbols_removed(0) { |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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diff
changeset
|
5229 |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
5230 _initial_string_table_size = StringTable::the_table()->table_size(); |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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diff
changeset
|
5231 _initial_symbol_table_size = SymbolTable::the_table()->table_size(); |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
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diff
changeset
|
5232 if (process_strings) { |
5a32d2a3cc1e
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tschatzl
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diff
changeset
|
5233 StringTable::clear_parallel_claimed_index(); |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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diff
changeset
|
5234 } |
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8027476: Improve performance of Stringtable unlink
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diff
changeset
|
5235 if (process_symbols) { |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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diff
changeset
|
5236 SymbolTable::clear_parallel_claimed_index(); |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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diff
changeset
|
5237 } |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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13400
diff
changeset
|
5238 } |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
5239 |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
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|
5240 ~G1StringSymbolTableUnlinkTask() { |
17652
0eb64cfc0b76
8033443: Test8000311 fails after latest changes to parallelize string and symbol table unlink
tschatzl
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17651
diff
changeset
|
5241 guarantee(!_process_strings || !_do_in_parallel || StringTable::parallel_claimed_index() >= _initial_string_table_size, |
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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diff
changeset
|
5242 err_msg("claim value "INT32_FORMAT" after unlink less than initial string table size "INT32_FORMAT, |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
5243 StringTable::parallel_claimed_index(), _initial_string_table_size)); |
17652
0eb64cfc0b76
8033443: Test8000311 fails after latest changes to parallelize string and symbol table unlink
tschatzl
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diff
changeset
|
5244 guarantee(!_process_symbols || !_do_in_parallel || SymbolTable::parallel_claimed_index() >= _initial_symbol_table_size, |
17634
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tschatzl
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diff
changeset
|
5245 err_msg("claim value "INT32_FORMAT" after unlink less than initial symbol table size "INT32_FORMAT, |
5a32d2a3cc1e
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tschatzl
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changeset
|
5246 SymbolTable::parallel_claimed_index(), _initial_symbol_table_size)); |
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diff
changeset
|
5247 } |
5a32d2a3cc1e
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diff
changeset
|
5248 |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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diff
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|
5249 void work(uint worker_id) { |
17652
0eb64cfc0b76
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tschatzl
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diff
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|
5250 if (_do_in_parallel) { |
17634
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diff
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|
5251 int strings_processed = 0; |
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diff
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|
5252 int strings_removed = 0; |
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|
5253 int symbols_processed = 0; |
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changeset
|
5254 int symbols_removed = 0; |
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|
5255 if (_process_strings) { |
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diff
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|
5256 StringTable::possibly_parallel_unlink(_is_alive, &strings_processed, &strings_removed); |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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|
5257 Atomic::add(strings_processed, &_strings_processed); |
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|
5258 Atomic::add(strings_removed, &_strings_removed); |
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|
5259 } |
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diff
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|
5260 if (_process_symbols) { |
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|
5261 SymbolTable::possibly_parallel_unlink(&symbols_processed, &symbols_removed); |
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8027476: Improve performance of Stringtable unlink
tschatzl
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changeset
|
5262 Atomic::add(symbols_processed, &_symbols_processed); |
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5263 Atomic::add(symbols_removed, &_symbols_removed); |
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|
5264 } |
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|
5265 } else { |
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|
5266 if (_process_strings) { |
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|
5267 StringTable::unlink(_is_alive, &_strings_processed, &_strings_removed); |
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|
5268 } |
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changeset
|
5269 if (_process_symbols) { |
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|
5270 SymbolTable::unlink(&_symbols_processed, &_symbols_removed); |
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|
5271 } |
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changeset
|
5272 } |
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diff
changeset
|
5273 } |
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changeset
|
5274 |
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|
5275 size_t strings_processed() const { return (size_t)_strings_processed; } |
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|
5276 size_t strings_removed() const { return (size_t)_strings_removed; } |
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|
5277 |
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|
5278 size_t symbols_processed() const { return (size_t)_symbols_processed; } |
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|
5279 size_t symbols_removed() const { return (size_t)_symbols_removed; } |
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|
5280 }; |
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changeset
|
5281 |
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|
5282 void G1CollectedHeap::unlink_string_and_symbol_table(BoolObjectClosure* is_alive, |
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|
5283 bool process_strings, bool process_symbols) { |
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|
5284 uint n_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
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|
5285 _g1h->workers()->active_workers() : 1); |
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|
5286 |
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|
5287 G1StringSymbolTableUnlinkTask g1_unlink_task(is_alive, process_strings, process_symbols); |
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|
5288 if (G1CollectedHeap::use_parallel_gc_threads()) { |
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|
5289 set_par_threads(n_workers); |
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changeset
|
5290 workers()->run_task(&g1_unlink_task); |
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|
5291 set_par_threads(0); |
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|
5292 } else { |
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|
5293 g1_unlink_task.work(0); |
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|
5294 } |
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|
5295 if (G1TraceStringSymbolTableScrubbing) { |
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|
5296 gclog_or_tty->print_cr("Cleaned string and symbol table, " |
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|
5297 "strings: "SIZE_FORMAT" processed, "SIZE_FORMAT" removed, " |
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|
5298 "symbols: "SIZE_FORMAT" processed, "SIZE_FORMAT" removed", |
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|
5299 g1_unlink_task.strings_processed(), g1_unlink_task.strings_removed(), |
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|
5300 g1_unlink_task.symbols_processed(), g1_unlink_task.symbols_removed()); |
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|
5301 } |
17764 | 5302 |
5303 if (G1StringDedup::is_enabled()) { | |
5304 G1StringDedup::unlink(is_alive); | |
5305 } | |
17634
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|
5306 } |
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diff
changeset
|
5307 |
17756
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
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diff
changeset
|
5308 class RedirtyLoggedCardTableEntryFastClosure : public CardTableEntryClosure { |
a07bea31ef35
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diff
changeset
|
5309 public: |
17844
8847586c9037
8016302: Change type of the number of GC workers to unsigned int (2)
vkempik
parents:
17833
diff
changeset
|
5310 bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
17756
a07bea31ef35
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tschatzl
parents:
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diff
changeset
|
5311 *card_ptr = CardTableModRefBS::dirty_card_val(); |
a07bea31ef35
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tschatzl
parents:
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diff
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|
5312 return true; |
a07bea31ef35
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tschatzl
parents:
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diff
changeset
|
5313 } |
a07bea31ef35
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tschatzl
parents:
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diff
changeset
|
5314 }; |
a07bea31ef35
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tschatzl
parents:
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diff
changeset
|
5315 |
a07bea31ef35
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tschatzl
parents:
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diff
changeset
|
5316 void G1CollectedHeap::redirty_logged_cards() { |
a07bea31ef35
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tschatzl
parents:
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diff
changeset
|
5317 guarantee(G1DeferredRSUpdate, "Must only be called when using deferred RS updates."); |
a07bea31ef35
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tschatzl
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diff
changeset
|
5318 double redirty_logged_cards_start = os::elapsedTime(); |
a07bea31ef35
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tschatzl
parents:
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diff
changeset
|
5319 |
a07bea31ef35
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tschatzl
parents:
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diff
changeset
|
5320 RedirtyLoggedCardTableEntryFastClosure redirty; |
a07bea31ef35
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tschatzl
parents:
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diff
changeset
|
5321 dirty_card_queue_set().set_closure(&redirty); |
a07bea31ef35
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tschatzl
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diff
changeset
|
5322 dirty_card_queue_set().apply_closure_to_all_completed_buffers(); |
a07bea31ef35
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tschatzl
parents:
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diff
changeset
|
5323 |
a07bea31ef35
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tschatzl
parents:
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diff
changeset
|
5324 DirtyCardQueueSet& dcq = JavaThread::dirty_card_queue_set(); |
a07bea31ef35
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tschatzl
parents:
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diff
changeset
|
5325 dcq.merge_bufferlists(&dirty_card_queue_set()); |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5326 assert(dirty_card_queue_set().completed_buffers_num() == 0, "All should be consumed"); |
a07bea31ef35
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tschatzl
parents:
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diff
changeset
|
5327 |
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5328 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:
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diff
changeset
|
5329 } |
a07bea31ef35
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tschatzl
parents:
17755
diff
changeset
|
5330 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5331 // Weak Reference Processing support |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5332 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5333 // An always "is_alive" closure that is used to preserve referents. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5334 // 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
|
5335 // of referent objects that are pointed to by reference objects |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5336 // discovered by the CM ref processor. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5337 class G1AlwaysAliveClosure: public BoolObjectClosure { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5338 G1CollectedHeap* _g1; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5339 public: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5340 G1AlwaysAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5341 bool do_object_b(oop p) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5342 if (p != NULL) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5343 return true; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5344 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5345 return false; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5346 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5347 }; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5348 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5349 bool G1STWIsAliveClosure::do_object_b(oop p) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5350 // An object is reachable if it is outside the collection set, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5351 // or is inside and copied. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5352 return !_g1->obj_in_cs(p) || p->is_forwarded(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5353 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5354 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5355 // Non Copying Keep Alive closure |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5356 class G1KeepAliveClosure: public OopClosure { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5357 G1CollectedHeap* _g1; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5358 public: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5359 G1KeepAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5360 void do_oop(narrowOop* p) { guarantee(false, "Not needed"); } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5361 void do_oop( oop* p) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5362 oop obj = *p; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5363 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5364 if (_g1->obj_in_cs(obj)) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5365 assert( obj->is_forwarded(), "invariant" ); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5366 *p = obj->forwardee(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5367 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5368 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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 // Copying Keep Alive closure - can be called from both |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5372 // serial and parallel code as long as different worker |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5373 // threads utilize different G1ParScanThreadState instances |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5374 // and different queues. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5375 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5376 class G1CopyingKeepAliveClosure: public OopClosure { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5377 G1CollectedHeap* _g1h; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5378 OopClosure* _copy_non_heap_obj_cl; |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
changeset
|
5379 OopsInHeapRegionClosure* _copy_metadata_obj_cl; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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3973
diff
changeset
|
5380 G1ParScanThreadState* _par_scan_state; |
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
5381 |
4dfb2df418f2
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diff
changeset
|
5382 public: |
4dfb2df418f2
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3973
diff
changeset
|
5383 G1CopyingKeepAliveClosure(G1CollectedHeap* g1h, |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5384 OopClosure* non_heap_obj_cl, |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5385 OopsInHeapRegionClosure* metadata_obj_cl, |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5386 G1ParScanThreadState* pss): |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5387 _g1h(g1h), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5388 _copy_non_heap_obj_cl(non_heap_obj_cl), |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5389 _copy_metadata_obj_cl(metadata_obj_cl), |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5390 _par_scan_state(pss) |
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
5391 {} |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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|
5392 |
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|
5393 virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
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|
5394 virtual void do_oop( oop* p) { do_oop_work(p); } |
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|
5395 |
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|
5396 template <class T> void do_oop_work(T* p) { |
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|
5397 oop obj = oopDesc::load_decode_heap_oop(p); |
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changeset
|
5398 |
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diff
changeset
|
5399 if (_g1h->obj_in_cs(obj)) { |
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|
5400 // If the referent object has been forwarded (either copied |
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|
5401 // to a new location or to itself in the event of an |
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|
5402 // evacuation failure) then we need to update the reference |
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diff
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|
5403 // field and, if both reference and referent are in the G1 |
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|
5404 // heap, update the RSet for the referent. |
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diff
changeset
|
5405 // |
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|
5406 // If the referent has not been forwarded then we have to keep |
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|
5407 // it alive by policy. Therefore we have copy the referent. |
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|
5408 // |
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|
5409 // If the reference field is in the G1 heap then we can push |
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changeset
|
5410 // on the PSS queue. When the queue is drained (after each |
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changeset
|
5411 // phase of reference processing) the object and it's followers |
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|
5412 // will be copied, the reference field set to point to the |
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|
5413 // new location, and the RSet updated. Otherwise we need to |
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5414 // use the the non-heap or metadata closures directly to copy |
10405 | 5415 // the referent object and update the pointer, while avoiding |
3979
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|
5416 // updating the RSet. |
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|
5417 |
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|
5418 if (_g1h->is_in_g1_reserved(p)) { |
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|
5419 _par_scan_state->push_on_queue(p); |
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|
5420 } else { |
17935
7384f6a12fc1
8038212: Method::is_valid_method() check has performance regression impact for stackwalking
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|
5421 assert(!Metaspace::contains((const void*)p), |
6725
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5422 err_msg("Otherwise need to call _copy_metadata_obj_cl->do_oop(p) " |
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5423 PTR_FORMAT, p)); |
3979
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|
5424 _copy_non_heap_obj_cl->do_oop(p); |
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|
5425 } |
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changeset
|
5426 } |
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|
5427 } |
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|
5428 }; |
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changeset
|
5429 |
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|
5430 // Serial drain queue closure. Called as the 'complete_gc' |
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|
5431 // closure for each discovered list in some of the |
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|
5432 // reference processing phases. |
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|
5433 |
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|
5434 class G1STWDrainQueueClosure: public VoidClosure { |
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|
5435 protected: |
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diff
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|
5436 G1CollectedHeap* _g1h; |
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|
5437 G1ParScanThreadState* _par_scan_state; |
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|
5438 |
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|
5439 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } |
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|
5440 |
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|
5441 public: |
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diff
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|
5442 G1STWDrainQueueClosure(G1CollectedHeap* g1h, G1ParScanThreadState* pss) : |
4dfb2df418f2
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|
5443 _g1h(g1h), |
4dfb2df418f2
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|
5444 _par_scan_state(pss) |
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|
5445 { } |
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diff
changeset
|
5446 |
4dfb2df418f2
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diff
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|
5447 void do_void() { |
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|
5448 G1ParScanThreadState* const pss = par_scan_state(); |
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|
5449 pss->trim_queue(); |
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|
5450 } |
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diff
changeset
|
5451 }; |
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diff
changeset
|
5452 |
4dfb2df418f2
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diff
changeset
|
5453 // Parallel Reference Processing closures |
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diff
changeset
|
5454 |
4dfb2df418f2
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diff
changeset
|
5455 // Implementation of AbstractRefProcTaskExecutor for parallel reference |
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diff
changeset
|
5456 // processing during G1 evacuation pauses. |
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diff
changeset
|
5457 |
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|
5458 class G1STWRefProcTaskExecutor: public AbstractRefProcTaskExecutor { |
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|
5459 private: |
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diff
changeset
|
5460 G1CollectedHeap* _g1h; |
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diff
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|
5461 RefToScanQueueSet* _queues; |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
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4090
diff
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|
5462 FlexibleWorkGang* _workers; |
3979
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parents:
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|
5463 int _active_workers; |
4dfb2df418f2
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parents:
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diff
changeset
|
5464 |
4dfb2df418f2
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diff
changeset
|
5465 public: |
4dfb2df418f2
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diff
changeset
|
5466 G1STWRefProcTaskExecutor(G1CollectedHeap* g1h, |
4095
bca17e38de00
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jmasa
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4090
diff
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|
5467 FlexibleWorkGang* workers, |
3979
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diff
changeset
|
5468 RefToScanQueueSet *task_queues, |
4dfb2df418f2
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diff
changeset
|
5469 int n_workers) : |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5470 _g1h(g1h), |
4dfb2df418f2
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diff
changeset
|
5471 _queues(task_queues), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5472 _workers(workers), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5473 _active_workers(n_workers) |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5474 { |
4dfb2df418f2
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diff
changeset
|
5475 assert(n_workers > 0, "shouldn't call this otherwise"); |
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diff
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|
5476 } |
4dfb2df418f2
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diff
changeset
|
5477 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5478 // Executes the given task using concurrent marking worker threads. |
4dfb2df418f2
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parents:
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diff
changeset
|
5479 virtual void execute(ProcessTask& task); |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5480 virtual void execute(EnqueueTask& task); |
4dfb2df418f2
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parents:
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diff
changeset
|
5481 }; |
4dfb2df418f2
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diff
changeset
|
5482 |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5483 // Gang task for possibly parallel reference processing |
4dfb2df418f2
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diff
changeset
|
5484 |
4dfb2df418f2
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diff
changeset
|
5485 class G1STWRefProcTaskProxy: public AbstractGangTask { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5486 typedef AbstractRefProcTaskExecutor::ProcessTask ProcessTask; |
4dfb2df418f2
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3973
diff
changeset
|
5487 ProcessTask& _proc_task; |
4dfb2df418f2
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3973
diff
changeset
|
5488 G1CollectedHeap* _g1h; |
4dfb2df418f2
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3973
diff
changeset
|
5489 RefToScanQueueSet *_task_queues; |
4dfb2df418f2
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3973
diff
changeset
|
5490 ParallelTaskTerminator* _terminator; |
4dfb2df418f2
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3973
diff
changeset
|
5491 |
4dfb2df418f2
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diff
changeset
|
5492 public: |
4dfb2df418f2
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diff
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|
5493 G1STWRefProcTaskProxy(ProcessTask& proc_task, |
4dfb2df418f2
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diff
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|
5494 G1CollectedHeap* g1h, |
4dfb2df418f2
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3973
diff
changeset
|
5495 RefToScanQueueSet *task_queues, |
4dfb2df418f2
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diff
changeset
|
5496 ParallelTaskTerminator* terminator) : |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5497 AbstractGangTask("Process reference objects in parallel"), |
4dfb2df418f2
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diff
changeset
|
5498 _proc_task(proc_task), |
4dfb2df418f2
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3973
diff
changeset
|
5499 _g1h(g1h), |
4dfb2df418f2
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3973
diff
changeset
|
5500 _task_queues(task_queues), |
4dfb2df418f2
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diff
changeset
|
5501 _terminator(terminator) |
4dfb2df418f2
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diff
changeset
|
5502 {} |
4dfb2df418f2
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3973
diff
changeset
|
5503 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5504 virtual void work(uint worker_id) { |
3979
4dfb2df418f2
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diff
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|
5505 // The reference processing task executed by a single worker. |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5506 ResourceMark rm; |
4dfb2df418f2
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3973
diff
changeset
|
5507 HandleMark hm; |
4dfb2df418f2
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diff
changeset
|
5508 |
4dfb2df418f2
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diff
changeset
|
5509 G1STWIsAliveClosure is_alive(_g1h); |
4dfb2df418f2
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diff
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|
5510 |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5511 G1ParScanThreadState pss(_g1h, worker_id, NULL); |
3979
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diff
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|
5512 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
5513 |
3979
4dfb2df418f2
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diff
changeset
|
5514 pss.set_evac_failure_closure(&evac_failure_cl); |
4dfb2df418f2
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diff
changeset
|
5515 |
4dfb2df418f2
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diff
changeset
|
5516 G1ParScanExtRootClosure only_copy_non_heap_cl(_g1h, &pss, NULL); |
6725
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coleenp
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6629
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|
5517 G1ParScanMetadataClosure only_copy_metadata_cl(_g1h, &pss, NULL); |
3979
4dfb2df418f2
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diff
changeset
|
5518 |
4dfb2df418f2
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diff
changeset
|
5519 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
6725
da91efe96a93
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coleenp
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6629
diff
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|
5520 G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(_g1h, &pss, NULL); |
3979
4dfb2df418f2
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diff
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|
5521 |
4dfb2df418f2
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diff
changeset
|
5522 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
6725
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coleenp
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6629
diff
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|
5523 OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
3979
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|
5524 |
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|
5525 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
4dfb2df418f2
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parents:
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|
5526 // We also need to mark copied objects. |
4dfb2df418f2
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parents:
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diff
changeset
|
5527 copy_non_heap_cl = ©_mark_non_heap_cl; |
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da91efe96a93
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|
5528 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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diff
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|
5529 } |
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parents:
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diff
changeset
|
5530 |
4dfb2df418f2
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|
5531 // Keep alive closure. |
6725
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|
5532 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, copy_metadata_cl, &pss); |
3979
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|
5533 |
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diff
changeset
|
5534 // Complete GC closure |
4dfb2df418f2
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|
5535 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _task_queues, _terminator); |
4dfb2df418f2
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|
5536 |
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|
5537 // Call the reference processing task's work routine. |
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|
5538 _proc_task.work(worker_id, is_alive, keep_alive, drain_queue); |
3979
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|
5539 |
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|
5540 // Note we cannot assert that the refs array is empty here as not all |
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|
5541 // of the processing tasks (specifically phase2 - pp2_work) execute |
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|
5542 // the complete_gc closure (which ordinarily would drain the queue) so |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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|
5543 // the queue may not be empty. |
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diff
changeset
|
5544 } |
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parents:
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diff
changeset
|
5545 }; |
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parents:
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diff
changeset
|
5546 |
4dfb2df418f2
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diff
changeset
|
5547 // Driver routine for parallel reference processing. |
4dfb2df418f2
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parents:
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diff
changeset
|
5548 // Creates an instance of the ref processing gang |
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parents:
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diff
changeset
|
5549 // task and has the worker threads execute it. |
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|
5550 void G1STWRefProcTaskExecutor::execute(ProcessTask& proc_task) { |
4dfb2df418f2
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|
5551 assert(_workers != NULL, "Need parallel worker threads."); |
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|
5552 |
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|
5553 ParallelTaskTerminator terminator(_active_workers, _queues); |
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|
5554 G1STWRefProcTaskProxy proc_task_proxy(proc_task, _g1h, _queues, &terminator); |
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|
5555 |
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|
5556 _g1h->set_par_threads(_active_workers); |
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|
5557 _workers->run_task(&proc_task_proxy); |
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|
5558 _g1h->set_par_threads(0); |
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parents:
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|
5559 } |
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parents:
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diff
changeset
|
5560 |
4dfb2df418f2
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parents:
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diff
changeset
|
5561 // Gang task for parallel reference enqueueing. |
4dfb2df418f2
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parents:
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diff
changeset
|
5562 |
4dfb2df418f2
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|
5563 class G1STWRefEnqueueTaskProxy: public AbstractGangTask { |
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|
5564 typedef AbstractRefProcTaskExecutor::EnqueueTask EnqueueTask; |
4dfb2df418f2
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|
5565 EnqueueTask& _enq_task; |
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parents:
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diff
changeset
|
5566 |
4dfb2df418f2
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parents:
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diff
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|
5567 public: |
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parents:
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diff
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|
5568 G1STWRefEnqueueTaskProxy(EnqueueTask& enq_task) : |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
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|
5569 AbstractGangTask("Enqueue reference objects in parallel"), |
4dfb2df418f2
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parents:
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diff
changeset
|
5570 _enq_task(enq_task) |
4dfb2df418f2
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parents:
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diff
changeset
|
5571 { } |
4dfb2df418f2
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parents:
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diff
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|
5572 |
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parents:
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|
5573 virtual void work(uint worker_id) { |
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parents:
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|
5574 _enq_task.work(worker_id); |
3979
4dfb2df418f2
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parents:
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diff
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|
5575 } |
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parents:
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diff
changeset
|
5576 }; |
4dfb2df418f2
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parents:
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diff
changeset
|
5577 |
10405 | 5578 // Driver routine for parallel reference enqueueing. |
3979
4dfb2df418f2
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parents:
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diff
changeset
|
5579 // Creates an instance of the ref enqueueing gang |
4dfb2df418f2
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parents:
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diff
changeset
|
5580 // task and has the worker threads execute it. |
4dfb2df418f2
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parents:
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diff
changeset
|
5581 |
4dfb2df418f2
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parents:
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diff
changeset
|
5582 void G1STWRefProcTaskExecutor::execute(EnqueueTask& enq_task) { |
4dfb2df418f2
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parents:
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diff
changeset
|
5583 assert(_workers != NULL, "Need parallel worker threads."); |
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6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5584 |
4dfb2df418f2
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parents:
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diff
changeset
|
5585 G1STWRefEnqueueTaskProxy enq_task_proxy(enq_task); |
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parents:
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diff
changeset
|
5586 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5587 _g1h->set_par_threads(_active_workers); |
4dfb2df418f2
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parents:
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diff
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|
5588 _workers->run_task(&enq_task_proxy); |
4dfb2df418f2
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parents:
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diff
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|
5589 _g1h->set_par_threads(0); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5590 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5591 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5592 // End of weak reference support closures |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5593 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5594 // 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
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|
5595 // that are in the collection set and are pointed to by reference |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5596 // objects discovered by the CM ref processor. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5597 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5598 class G1ParPreserveCMReferentsTask: public AbstractGangTask { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5599 protected: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5600 G1CollectedHeap* _g1h; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5601 RefToScanQueueSet *_queues; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5602 ParallelTaskTerminator _terminator; |
4728
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7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5603 uint _n_workers; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5604 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5605 public: |
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
5606 G1ParPreserveCMReferentsTask(G1CollectedHeap* g1h,int workers, RefToScanQueueSet *task_queues) : |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5607 AbstractGangTask("ParPreserveCMReferents"), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5608 _g1h(g1h), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5609 _queues(task_queues), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5610 _terminator(workers, _queues), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5611 _n_workers(workers) |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5612 { } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5613 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5614 void work(uint worker_id) { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5615 ResourceMark rm; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5616 HandleMark hm; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5617 |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5618 G1ParScanThreadState pss(_g1h, worker_id, NULL); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5619 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
5620 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5621 pss.set_evac_failure_closure(&evac_failure_cl); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5622 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5623 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
|
5624 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5625 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5626 G1ParScanExtRootClosure only_copy_non_heap_cl(_g1h, &pss, NULL); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5627 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
|
5628 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5629 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
|
5630 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
|
5631 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5632 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
6725
da91efe96a93
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coleenp
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6629
diff
changeset
|
5633 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
|
5634 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5635 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5636 // We also need to mark copied objects. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5637 copy_non_heap_cl = ©_mark_non_heap_cl; |
6725
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coleenp
parents:
6629
diff
changeset
|
5638 copy_metadata_cl = ©_mark_metadata_cl; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5639 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5640 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5641 // Is alive closure |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5642 G1AlwaysAliveClosure always_alive(_g1h); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5643 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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3973
diff
changeset
|
5644 // 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
|
5645 // to be copied. |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5646 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:
3973
diff
changeset
|
5647 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5648 ReferenceProcessor* rp = _g1h->ref_processor_cm(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5649 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5650 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
|
5651 uint stride = MIN2(MAX2(_n_workers, 1U), limit); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5652 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5653 // 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
|
5654 // 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
|
5655 // change the worker ids. |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5656 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
|
5657 assert(!rp->discovery_is_atomic(), "check this code"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5658 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5659 // 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
|
5660 for (uint idx = worker_id; idx < limit; idx += stride) { |
4014
bf2d2b8b1726
7095243: Disambiguate ReferenceProcessor::_discoveredSoftRefs
johnc
parents:
4013
diff
changeset
|
5661 DiscoveredList& ref_list = rp->discovered_refs()[idx]; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5662 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5663 DiscoveredListIterator iter(ref_list, &keep_alive, &always_alive); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5664 while (iter.has_next()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5665 // Since discovery is not atomic for the CM ref processor, we |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5666 // can see some null referent objects. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5667 iter.load_ptrs(DEBUG_ONLY(true)); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5668 oop ref = iter.obj(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5669 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5670 // This will filter nulls. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5671 if (iter.is_referent_alive()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5672 iter.make_referent_alive(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5673 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5674 iter.move_to_next(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5675 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5676 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5677 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5678 // Drain the queue - which may cause stealing |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5679 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _queues, &_terminator); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5680 drain_queue.do_void(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5681 // Allocation buffers were retired at the end of G1ParEvacuateFollowersClosure |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5682 assert(pss.refs()->is_empty(), "should be"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5683 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5684 }; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5685 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5686 // Weak Reference processing during an evacuation pause (part 1). |
6819 | 5687 void G1CollectedHeap::process_discovered_references(uint no_of_gc_workers) { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5688 double ref_proc_start = os::elapsedTime(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5689 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5690 ReferenceProcessor* rp = _ref_processor_stw; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5691 assert(rp->discovery_enabled(), "should have been enabled"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5692 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5693 // Any reference objects, in the collection set, that were 'discovered' |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5694 // 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
|
5695 // applying the external root copy closure to the discovered lists, or |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5696 // by following an RSet entry). |
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 // 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
|
5699 // 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
|
5700 // processor would have seen that the reference object had already |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5701 // been 'discovered' and would have skipped discovering the reference, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5702 // but would not have treated the reference object as a regular oop. |
10405 | 5703 // 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
|
5704 // referent object. |
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 // We need to explicitly copy these referent objects - the references |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5707 // will be processed at the end of remarking. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5708 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5709 // 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
|
5710 // 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
|
5711 // referents points to another object which is also referenced by an |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5712 // object discovered by the STW ref processor. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5713 |
4711 | 5714 assert(!G1CollectedHeap::use_parallel_gc_threads() || |
6819 | 5715 no_of_gc_workers == workers()->active_workers(), |
5716 "Need to reset active GC workers"); | |
5717 | |
5718 set_par_threads(no_of_gc_workers); | |
5719 G1ParPreserveCMReferentsTask keep_cm_referents(this, | |
5720 no_of_gc_workers, | |
5721 _task_queues); | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5722 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5723 if (G1CollectedHeap::use_parallel_gc_threads()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5724 workers()->run_task(&keep_cm_referents); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5725 } else { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5726 keep_cm_referents.work(0); |
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 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5729 set_par_threads(0); |
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 // Closure to test whether a referent is alive. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5732 G1STWIsAliveClosure is_alive(this); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5733 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5734 // Even when parallel reference processing is enabled, the processing |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5735 // 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
|
5736 // 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
|
5737 // JNI refs. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5738 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5739 // Use only a single queue for this PSS. |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5740 G1ParScanThreadState pss(this, 0, NULL); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5741 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5742 // We do not embed a reference processor in the copying/scanning |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5743 // closures while we're actually processing the discovered |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5744 // reference objects. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5745 G1ParScanHeapEvacFailureClosure evac_failure_cl(this, &pss, NULL); |
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
5746 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5747 pss.set_evac_failure_closure(&evac_failure_cl); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5748 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5749 assert(pss.refs()->is_empty(), "pre-condition"); |
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 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
|
5752 G1ParScanMetadataClosure only_copy_metadata_cl(this, &pss, NULL); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5753 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5754 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
|
5755 G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(this, &pss, NULL); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5756 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5757 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
|
5758 OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5759 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5760 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5761 // We also need to mark copied objects. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5762 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
|
5763 copy_metadata_cl = ©_mark_metadata_cl; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5764 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5765 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5766 // Keep alive closure. |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5767 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
|
5768 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5769 // Serial Complete GC closure |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5770 G1STWDrainQueueClosure drain_queue(this, &pss); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5771 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5772 // Setup the soft refs policy... |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5773 rp->setup_policy(false); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5774 |
10405 | 5775 ReferenceProcessorStats stats; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5776 if (!rp->processing_is_mt()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5777 // Serial reference processing... |
10405 | 5778 stats = rp->process_discovered_references(&is_alive, |
5779 &keep_alive, | |
5780 &drain_queue, | |
5781 NULL, | |
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5782 _gc_timer_stw, |
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5783 _gc_tracer_stw->gc_id()); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5784 } else { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5785 // Parallel reference processing |
6819 | 5786 assert(rp->num_q() == no_of_gc_workers, "sanity"); |
5787 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
5788 | |
5789 G1STWRefProcTaskExecutor par_task_executor(this, workers(), _task_queues, no_of_gc_workers); | |
10405 | 5790 stats = rp->process_discovered_references(&is_alive, |
5791 &keep_alive, | |
5792 &drain_queue, | |
5793 &par_task_executor, | |
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5794 _gc_timer_stw, |
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5795 _gc_tracer_stw->gc_id()); |
10405 | 5796 } |
5797 | |
5798 _gc_tracer_stw->report_gc_reference_stats(stats); | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5799 // We have completed copying any necessary live referent objects |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
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|
5800 // (that were not copied during the actual pause) so we can |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5801 // retire any active alloc buffers |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5802 pss.retire_alloc_buffers(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5803 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
|
5804 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5805 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
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|
5806 g1_policy()->phase_times()->record_ref_proc_time(ref_proc_time * 1000.0); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5807 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5808 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5809 // Weak Reference processing during an evacuation pause (part 2). |
6819 | 5810 void G1CollectedHeap::enqueue_discovered_references(uint no_of_gc_workers) { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5811 double ref_enq_start = os::elapsedTime(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5812 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
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diff
changeset
|
5813 ReferenceProcessor* rp = _ref_processor_stw; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5814 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
|
5815 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5816 // Now enqueue any remaining on the discovered lists on to |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5817 // the pending list. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5818 if (!rp->processing_is_mt()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5819 // Serial reference processing... |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5820 rp->enqueue_discovered_references(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5821 } else { |
10405 | 5822 // Parallel reference enqueueing |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5823 |
6819 | 5824 assert(no_of_gc_workers == workers()->active_workers(), |
5825 "Need to reset active workers"); | |
5826 assert(rp->num_q() == no_of_gc_workers, "sanity"); | |
5827 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
5828 | |
5829 G1STWRefProcTaskExecutor par_task_executor(this, workers(), _task_queues, no_of_gc_workers); | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5830 rp->enqueue_discovered_references(&par_task_executor); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5831 } |
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 rp->verify_no_references_recorded(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5834 assert(!rp->discovery_enabled(), "should have been disabled"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5835 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5836 // FIXME |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5837 // CM's reference processing also cleans up the string and symbol tables. |
4dfb2df418f2
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johnc
parents:
3973
diff
changeset
|
5838 // Should we do that here also? We could, but it is a serial operation |
10405 | 5839 // and could significantly increase the pause time. |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5840 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5841 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
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|
5842 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
|
5843 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5844 |
10405 | 5845 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
|
5846 _expand_heap_after_alloc_failure = true; |
10405 | 5847 _evacuation_failed = false; |
342 | 5848 |
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5849 // 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
|
5850 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
|
5851 |
342 | 5852 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
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10242
diff
changeset
|
5853 |
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5854 // Disable the hot card cache. |
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5855 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
|
5856 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
|
5857 hot_card_cache->set_use_cache(false); |
889 | 5858 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5859 uint n_workers; |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5860 if (G1CollectedHeap::use_parallel_gc_threads()) { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5861 n_workers = |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5862 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5863 workers()->active_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5864 Threads::number_of_non_daemon_threads()); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5865 assert(UseDynamicNumberOfGCThreads || |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5866 n_workers == workers()->total_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5867 "If not dynamic should be using all the workers"); |
4711 | 5868 workers()->set_active_workers(n_workers); |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5869 set_par_threads(n_workers); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5870 } else { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5871 assert(n_par_threads() == 0, |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5872 "Should be the original non-parallel value"); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5873 n_workers = 1; |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5874 } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5875 |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5876 G1ParTask g1_par_task(this, _task_queues); |
342 | 5877 |
5878 init_for_evac_failure(NULL); | |
5879 | |
5880 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
|
5881 |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5882 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
|
5883 double start_par_time_sec = os::elapsedTime(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5884 double end_par_time_sec; |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5885 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5886 { |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5887 StrongRootsScope srs(this); |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5888 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5889 if (G1CollectedHeap::use_parallel_gc_threads()) { |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5890 // 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
|
5891 if (ParallelGCVerbose) G1ParScanThreadState::print_termination_stats_hdr(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5892 // These tasks use ShareHeap::_process_strong_tasks |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5893 assert(UseDynamicNumberOfGCThreads || |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5894 workers()->active_workers() == workers()->total_workers(), |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5895 "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
|
5896 workers()->run_task(&g1_par_task); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5897 } else { |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5898 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
|
5899 g1_par_task.work(0); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5900 } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5901 end_par_time_sec = os::elapsedTime(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5902 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5903 // 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
|
5904 // 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
|
5905 // 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
|
5906 // 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
|
5907 // reported parallel time. |
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 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5910 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
|
5911 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
|
5912 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5913 double code_root_fixup_time_ms = |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5914 (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
|
5915 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
|
5916 |
342 | 5917 set_par_threads(0); |
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5918 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5919 // Process any discovered reference objects - we have |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5920 // to do this _before_ we retire the GC alloc regions |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5921 // as we may have to copy some 'reachable' referent |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5922 // objects (and their reachable sub-graphs) that were |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5923 // not copied during the pause. |
6819 | 5924 process_discovered_references(n_workers); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5925 |
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5926 // Weak root processing. |
342 | 5927 { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5928 G1STWIsAliveClosure is_alive(this); |
342 | 5929 G1KeepAliveClosure keep_alive(this); |
5930 JNIHandles::weak_oops_do(&is_alive, &keep_alive); | |
17764 | 5931 if (G1StringDedup::is_enabled()) { |
5932 G1StringDedup::unlink_or_oops_do(&is_alive, &keep_alive); | |
5933 } | |
342 | 5934 } |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5935 |
10405 | 5936 release_gc_alloc_regions(n_workers, evacuation_info); |
342 | 5937 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
|
5938 |
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5939 // 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
|
5940 // 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
|
5941 // 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
|
5942 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
|
5943 hot_card_cache->set_use_cache(true); |
342 | 5944 |
12080 | 5945 // Migrate the strong code roots attached to each region in |
5946 // the collection set. Ideally we would like to do this | |
5947 // after we have finished the scanning/evacuation of the | |
5948 // strong code roots for a particular heap region. | |
5949 migrate_strong_code_roots(); | |
5950 | |
17753
191174b49bec
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
17749
diff
changeset
|
5951 purge_code_root_memory(); |
191174b49bec
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
17749
diff
changeset
|
5952 |
12080 | 5953 if (g1_policy()->during_initial_mark_pause()) { |
5954 // Reset the claim values set during marking the strong code roots | |
5955 reset_heap_region_claim_values(); | |
5956 } | |
5957 | |
342 | 5958 finalize_for_evac_failure(); |
5959 | |
5960 if (evacuation_failed()) { | |
5961 remove_self_forwarding_pointers(); | |
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5962 |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5963 // Reset the G1EvacuationFailureALot counters and flags |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5964 // 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
|
5965 // evacuation failure occurs. |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5966 NOT_PRODUCT(reset_evacuation_should_fail();) |
342 | 5967 } |
5968 | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5969 // Enqueue any remaining references remaining on the STW |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5970 // reference processor's discovered lists. We need to do |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5971 // this after the card table is cleaned (and verified) as |
10405 | 5972 // the act of enqueueing entries on to the pending list |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5973 // will log these updates (and dirty their associated |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5974 // cards). We need these updates logged to update any |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5975 // RSets. |
6819 | 5976 enqueue_discovered_references(n_workers); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5977 |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5978 if (G1DeferredRSUpdate) { |
17756
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5979 redirty_logged_cards(); |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5980 } |
342 | 5981 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
5982 } | |
5983 | |
2152 | 5984 void G1CollectedHeap::free_region(HeapRegion* hr, |
5985 FreeRegionList* free_list, | |
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
5986 bool par, |
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
5987 bool locked) { |
2152 | 5988 assert(!hr->isHumongous(), "this is only for non-humongous regions"); |
5989 assert(!hr->is_empty(), "the region should not be empty"); | |
5990 assert(free_list != NULL, "pre-condition"); | |
5991 | |
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5992 // 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
|
5993 // 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
|
5994 // (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
|
5995 if (!hr->is_young()) { |
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5996 _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
|
5997 } |
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
5998 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
|
5999 free_list->add_ordered(hr); |
2152 | 6000 } |
6001 | |
6002 void G1CollectedHeap::free_humongous_region(HeapRegion* hr, | |
6003 FreeRegionList* free_list, | |
6004 bool par) { | |
6005 assert(hr->startsHumongous(), "this is only for starts humongous regions"); | |
6006 assert(free_list != NULL, "pre-condition"); | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6007 |
2152 | 6008 size_t hr_capacity = hr->capacity(); |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
6009 // 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
|
6010 // otherwise the information will be gone. |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
6011 uint last_index = hr->last_hc_index(); |
2152 | 6012 hr->set_notHumongous(); |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6013 free_region(hr, free_list, par); |
2152 | 6014 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
6015 uint i = hr->hrs_index() + 1; |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
6016 while (i < last_index) { |
3766 | 6017 HeapRegion* curr_hr = region_at(i); |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
6018 assert(curr_hr->continuesHumongous(), "invariant"); |
2152 | 6019 curr_hr->set_notHumongous(); |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6020 free_region(curr_hr, free_list, par); |
2152 | 6021 i += 1; |
6022 } | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6023 } |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6024 |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6025 void G1CollectedHeap::remove_from_old_sets(const HeapRegionSetCount& old_regions_removed, |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6026 const HeapRegionSetCount& humongous_regions_removed) { |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6027 if (old_regions_removed.length() > 0 || humongous_regions_removed.length() > 0) { |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6028 MutexLockerEx x(OldSets_lock, Mutex::_no_safepoint_check_flag); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6029 _old_set.bulk_remove(old_regions_removed); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6030 _humongous_set.bulk_remove(humongous_regions_removed); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6031 } |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6032 |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6033 } |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6034 |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6035 void G1CollectedHeap::prepend_to_freelist(FreeRegionList* list) { |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6036 assert(list != NULL, "list can't be null"); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6037 if (!list->is_empty()) { |
2152 | 6038 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
|
6039 _free_list.add_ordered(list); |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6040 } |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6041 } |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6042 |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6043 void G1CollectedHeap::decrement_summary_bytes(size_t bytes) { |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6044 assert(_summary_bytes_used >= bytes, |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6045 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
|
6046 _summary_bytes_used, bytes)); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6047 _summary_bytes_used -= bytes; |
342 | 6048 } |
6049 | |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6050 class G1ParCleanupCTTask : public AbstractGangTask { |
12343 | 6051 G1SATBCardTableModRefBS* _ct_bs; |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6052 G1CollectedHeap* _g1h; |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6053 HeapRegion* volatile _su_head; |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6054 public: |
12343 | 6055 G1ParCleanupCTTask(G1SATBCardTableModRefBS* ct_bs, |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6056 G1CollectedHeap* g1h) : |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6057 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
|
6058 _ct_bs(ct_bs), _g1h(g1h) { } |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6059 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
6060 void work(uint worker_id) { |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6061 HeapRegion* r; |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6062 while (r = _g1h->pop_dirty_cards_region()) { |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6063 clear_cards(r); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6064 } |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6065 } |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6066 |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6067 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
|
6068 // 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
|
6069 if (!r->is_survivor()) { |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6070 _ct_bs->clear(MemRegion(r->bottom(), r->end())); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6071 } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6072 } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6073 }; |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6074 |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6075 #ifndef PRODUCT |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6076 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
|
6077 G1CollectedHeap* _g1h; |
12343 | 6078 G1SATBCardTableModRefBS* _ct_bs; |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6079 public: |
12343 | 6080 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
|
6081 : _g1h(g1h), _ct_bs(ct_bs) { } |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6082 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
|
6083 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
|
6084 _g1h->verify_dirty_region(r); |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6085 } else { |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6086 _g1h->verify_not_dirty_region(r); |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6087 } |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6088 return false; |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6089 } |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6090 }; |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6091 |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6092 void G1CollectedHeap::verify_not_dirty_region(HeapRegion* hr) { |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6093 // All of the region should be clean. |
12343 | 6094 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6095 MemRegion mr(hr->bottom(), hr->end()); |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6096 ct_bs->verify_not_dirty_region(mr); |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6097 } |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6098 |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6099 void G1CollectedHeap::verify_dirty_region(HeapRegion* hr) { |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6100 // We cannot guarantee that [bottom(),end()] is dirty. Threads |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6101 // dirty allocated blocks as they allocate them. The thread that |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6102 // retires each region and replaces it with a new one will do a |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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parents:
3293
diff
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|
6103 // maximal allocation to fill in [pre_dummy_top(),end()] but will |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
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3293
diff
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|
6104 // not dirty that area (one less thing to have to do while holding |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
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3293
diff
changeset
|
6105 // a lock). So we can only verify that [bottom(),pre_dummy_top()] |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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diff
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|
6106 // is dirty. |
12343 | 6107 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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|
6108 MemRegion mr(hr->bottom(), hr->pre_dummy_top()); |
12835
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6109 if (hr->is_young()) { |
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
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diff
changeset
|
6110 ct_bs->verify_g1_young_region(mr); |
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
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diff
changeset
|
6111 } else { |
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
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diff
changeset
|
6112 ct_bs->verify_dirty_region(mr); |
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
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diff
changeset
|
6113 } |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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|
6114 } |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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|
6115 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6116 void G1CollectedHeap::verify_dirty_young_list(HeapRegion* head) { |
12343 | 6117 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
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|
6118 for (HeapRegion* hr = head; hr != NULL; hr = hr->get_next_young_region()) { |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
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|
6119 verify_dirty_region(hr); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
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|
6120 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6121 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
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diff
changeset
|
6122 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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|
6123 void G1CollectedHeap::verify_dirty_young_regions() { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
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|
6124 verify_dirty_young_list(_young_list->first_region()); |
abdfc822206f
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|
6125 } |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
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diff
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|
6126 #endif |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
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|
6127 |
342 | 6128 void G1CollectedHeap::cleanUpCardTable() { |
12343 | 6129 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
342 | 6130 double start = os::elapsedTime(); |
6131 | |
4023 | 6132 { |
6133 // Iterate over the dirty cards region list. | |
6134 G1ParCleanupCTTask cleanup_task(ct_bs, this); | |
6135 | |
4711 | 6136 if (G1CollectedHeap::use_parallel_gc_threads()) { |
6137 set_par_threads(); | |
4023 | 6138 workers()->run_task(&cleanup_task); |
6139 set_par_threads(0); | |
6140 } else { | |
6141 while (_dirty_cards_region_list) { | |
6142 HeapRegion* r = _dirty_cards_region_list; | |
6143 cleanup_task.clear_cards(r); | |
6144 _dirty_cards_region_list = r->get_next_dirty_cards_region(); | |
6145 if (_dirty_cards_region_list == r) { | |
6146 // The last region. | |
6147 _dirty_cards_region_list = NULL; | |
6148 } | |
6149 r->set_next_dirty_cards_region(NULL); | |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6150 } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
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794
diff
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|
6151 } |
4023 | 6152 #ifndef PRODUCT |
6153 if (G1VerifyCTCleanup || VerifyAfterGC) { | |
6154 G1VerifyCardTableCleanup cleanup_verifier(this, ct_bs); | |
6155 heap_region_iterate(&cleanup_verifier); | |
6156 } | |
6157 #endif | |
940
8624da129f0b
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apetrusenko
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|
6158 } |
1394
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6159 |
342 | 6160 double elapsed = os::elapsedTime() - start; |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
6161 g1_policy()->phase_times()->record_clear_ct_time(elapsed * 1000.0); |
342 | 6162 } |
6163 | |
10405 | 6164 void G1CollectedHeap::free_collection_set(HeapRegion* cs_head, EvacuationInfo& evacuation_info) { |
2152 | 6165 size_t pre_used = 0; |
6166 FreeRegionList local_free_list("Local List for CSet Freeing"); | |
6167 | |
342 | 6168 double young_time_ms = 0.0; |
6169 double non_young_time_ms = 0.0; | |
6170 | |
1394
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6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6171 // 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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|
6172 // all we need to do to clear the young list is clear its |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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|
6173 // 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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|
6174 _young_list->clear(); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6175 |
342 | 6176 G1CollectorPolicy* policy = g1_policy(); |
6177 | |
6178 double start_sec = os::elapsedTime(); | |
6179 bool non_young = true; | |
6180 | |
6181 HeapRegion* cur = cs_head; | |
6182 int age_bound = -1; | |
6183 size_t rs_lengths = 0; | |
6184 | |
6185 while (cur != NULL) { | |
2361 | 6186 assert(!is_on_master_free_list(cur), "sanity"); |
342 | 6187 if (non_young) { |
6188 if (cur->is_young()) { | |
6189 double end_sec = os::elapsedTime(); | |
6190 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
6191 non_young_time_ms += elapsed_ms; | |
6192 | |
6193 start_sec = os::elapsedTime(); | |
6194 non_young = false; | |
6195 } | |
6196 } else { | |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
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|
6197 if (!cur->is_young()) { |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
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|
6198 double end_sec = os::elapsedTime(); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
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|
6199 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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|
6200 young_time_ms += elapsed_ms; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
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|
6201 |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
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|
6202 start_sec = os::elapsedTime(); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
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|
6203 non_young = true; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
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|
6204 } |
342 | 6205 } |
6206 | |
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
6207 rs_lengths += cur->rem_set()->occupied_locked(); |
342 | 6208 |
6209 HeapRegion* next = cur->next_in_collection_set(); | |
6210 assert(cur->in_collection_set(), "bad CS"); | |
6211 cur->set_next_in_collection_set(NULL); | |
6212 cur->set_in_collection_set(false); | |
6213 | |
6214 if (cur->is_young()) { | |
6215 int index = cur->young_index_in_cset(); | |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4073
diff
changeset
|
6216 assert(index != -1, "invariant"); |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
6217 assert((uint) index < policy->young_cset_region_length(), "invariant"); |
342 | 6218 size_t words_survived = _surviving_young_words[index]; |
6219 cur->record_surv_words_in_group(words_survived); | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
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|
6220 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6221 // 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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|
6222 // (linked via next_in_collection_set()) but it is still in the |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6223 // young list (linked via next_young_region()). Clear the |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6224 // _next_young_region field. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6225 cur->set_next_young_region(NULL); |
342 | 6226 } else { |
6227 int index = cur->young_index_in_cset(); | |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4073
diff
changeset
|
6228 assert(index == -1, "invariant"); |
342 | 6229 } |
6230 | |
6231 assert( (cur->is_young() && cur->young_index_in_cset() > -1) || | |
6232 (!cur->is_young() && cur->young_index_in_cset() == -1), | |
6233 "invariant" ); | |
6234 | |
6235 if (!cur->evacuation_failed()) { | |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6236 MemRegion used_mr = cur->used_region(); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6237 |
342 | 6238 // And the region is empty. |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6239 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
|
6240 pre_used += cur->used(); |
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
6241 free_region(cur, &local_free_list, false /* par */, true /* locked */); |
342 | 6242 } else { |
6243 cur->uninstall_surv_rate_group(); | |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4073
diff
changeset
|
6244 if (cur->is_young()) { |
342 | 6245 cur->set_young_index_in_cset(-1); |
4090
a88de71c4e3a
7097002: G1: remove a lot of unused / redundant code from the G1CollectorPolicy class
tonyp
parents:
4073
diff
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|
6246 } |
342 | 6247 cur->set_not_young(); |
6248 cur->set_evacuation_failed(false); | |
4072 | 6249 // The region is now considered to be old. |
6250 _old_set.add(cur); | |
10405 | 6251 evacuation_info.increment_collectionset_used_after(cur->used()); |
342 | 6252 } |
6253 cur = next; | |
6254 } | |
6255 | |
10405 | 6256 evacuation_info.set_regions_freed(local_free_list.length()); |
342 | 6257 policy->record_max_rs_lengths(rs_lengths); |
6258 policy->cset_regions_freed(); | |
6259 | |
6260 double end_sec = os::elapsedTime(); | |
6261 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6262 |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6263 if (non_young) { |
342 | 6264 non_young_time_ms += elapsed_ms; |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6265 } else { |
342 | 6266 young_time_ms += elapsed_ms; |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
6267 } |
342 | 6268 |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6269 prepend_to_freelist(&local_free_list); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6270 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
|
6271 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
|
6272 policy->phase_times()->record_non_young_free_cset_time_ms(non_young_time_ms); |
342 | 6273 } |
6274 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
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|
6275 // 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
johnc
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1391
diff
changeset
|
6276 // 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
johnc
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1391
diff
changeset
|
6277 // 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
|
6278 // 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
johnc
parents:
1391
diff
changeset
|
6279 // the incremental collection set again. |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6280 // 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
johnc
parents:
1391
diff
changeset
|
6281 // 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
parents:
1391
diff
changeset
|
6282 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6283 void G1CollectedHeap::abandon_collection_set(HeapRegion* cs_head) { |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6284 HeapRegion* cur = cs_head; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6285 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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1391
diff
changeset
|
6286 while (cur != NULL) { |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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1391
diff
changeset
|
6287 HeapRegion* next = cur->next_in_collection_set(); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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1391
diff
changeset
|
6288 assert(cur->in_collection_set(), "bad CS"); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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1391
diff
changeset
|
6289 cur->set_next_in_collection_set(NULL); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6290 cur->set_in_collection_set(false); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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1391
diff
changeset
|
6291 cur->set_young_index_in_cset(-1); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6292 cur = next; |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6293 } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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1391
diff
changeset
|
6294 } |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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1391
diff
changeset
|
6295 |
2152 | 6296 void G1CollectedHeap::set_free_regions_coming() { |
6297 if (G1ConcRegionFreeingVerbose) { | |
6298 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
6299 "setting free regions coming"); | |
6300 } | |
6301 | |
6302 assert(!free_regions_coming(), "pre-condition"); | |
6303 _free_regions_coming = true; | |
342 | 6304 } |
6305 | |
2152 | 6306 void G1CollectedHeap::reset_free_regions_coming() { |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
6307 assert(free_regions_coming(), "pre-condition"); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
6308 |
2152 | 6309 { |
6310 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
6311 _free_regions_coming = false; | |
6312 SecondaryFreeList_lock->notify_all(); | |
6313 } | |
6314 | |
6315 if (G1ConcRegionFreeingVerbose) { | |
6316 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
6317 "reset free regions coming"); | |
342 | 6318 } |
6319 } | |
6320 | |
2152 | 6321 void G1CollectedHeap::wait_while_free_regions_coming() { |
6322 // Most of the time we won't have to wait, so let's do a quick test | |
6323 // first before we take the lock. | |
6324 if (!free_regions_coming()) { | |
6325 return; | |
6326 } | |
6327 | |
6328 if (G1ConcRegionFreeingVerbose) { | |
6329 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
6330 "waiting for free regions"); | |
342 | 6331 } |
6332 | |
6333 { | |
2152 | 6334 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
6335 while (free_regions_coming()) { | |
6336 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
342 | 6337 } |
2152 | 6338 } |
6339 | |
6340 if (G1ConcRegionFreeingVerbose) { | |
6341 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
6342 "done waiting for free regions"); | |
6343 } | |
342 | 6344 } |
6345 | |
6346 void G1CollectedHeap::set_region_short_lived_locked(HeapRegion* hr) { | |
6347 assert(heap_lock_held_for_gc(), | |
6348 "the heap lock should already be held by or for this thread"); | |
6349 _young_list->push_region(hr); | |
6350 } | |
6351 | |
6352 class NoYoungRegionsClosure: public HeapRegionClosure { | |
6353 private: | |
6354 bool _success; | |
6355 public: | |
6356 NoYoungRegionsClosure() : _success(true) { } | |
6357 bool doHeapRegion(HeapRegion* r) { | |
6358 if (r->is_young()) { | |
6359 gclog_or_tty->print_cr("Region ["PTR_FORMAT", "PTR_FORMAT") tagged as young", | |
6360 r->bottom(), r->end()); | |
6361 _success = false; | |
6362 } | |
6363 return false; | |
6364 } | |
6365 bool success() { return _success; } | |
6366 }; | |
6367 | |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
6368 bool G1CollectedHeap::check_young_list_empty(bool check_heap, bool check_sample) { |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
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diff
changeset
|
6369 bool ret = _young_list->check_list_empty(check_sample); |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
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diff
changeset
|
6370 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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parents:
1391
diff
changeset
|
6371 if (check_heap) { |
342 | 6372 NoYoungRegionsClosure closure; |
6373 heap_region_iterate(&closure); | |
6374 ret = ret && closure.success(); | |
6375 } | |
6376 | |
6377 return ret; | |
6378 } | |
6379 | |
4072 | 6380 class TearDownRegionSetsClosure : public HeapRegionClosure { |
6381 private: | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6382 HeapRegionSet *_old_set; |
2152 | 6383 |
342 | 6384 public: |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6385 TearDownRegionSetsClosure(HeapRegionSet* old_set) : _old_set(old_set) { } |
2152 | 6386 |
342 | 6387 bool doHeapRegion(HeapRegion* r) { |
4072 | 6388 if (r->is_empty()) { |
6389 // We ignore empty regions, we'll empty the free list afterwards | |
6390 } else if (r->is_young()) { | |
6391 // We ignore young regions, we'll empty the young list afterwards | |
6392 } else if (r->isHumongous()) { | |
6393 // We ignore humongous regions, we're not tearing down the | |
6394 // humongous region set | |
342 | 6395 } else { |
4072 | 6396 // The rest should be old |
6397 _old_set->remove(r); | |
342 | 6398 } |
6399 return false; | |
6400 } | |
6401 | |
4072 | 6402 ~TearDownRegionSetsClosure() { |
6403 assert(_old_set->is_empty(), "post-condition"); | |
2152 | 6404 } |
342 | 6405 }; |
6406 | |
4072 | 6407 void G1CollectedHeap::tear_down_region_sets(bool free_list_only) { |
6408 assert_at_safepoint(true /* should_be_vm_thread */); | |
6409 | |
6410 if (!free_list_only) { | |
6411 TearDownRegionSetsClosure cl(&_old_set); | |
6412 heap_region_iterate(&cl); | |
6413 | |
17764 | 6414 // Note that emptying the _young_list is postponed and instead done as |
6415 // the first step when rebuilding the regions sets again. The reason for | |
6416 // this is that during a full GC string deduplication needs to know if | |
6417 // a collected region was young or old when the full GC was initiated. | |
4072 | 6418 } |
6419 _free_list.remove_all(); | |
6420 } | |
6421 | |
6422 class RebuildRegionSetsClosure : public HeapRegionClosure { | |
6423 private: | |
6424 bool _free_list_only; | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6425 HeapRegionSet* _old_set; |
4072 | 6426 FreeRegionList* _free_list; |
6427 size_t _total_used; | |
6428 | |
6429 public: | |
6430 RebuildRegionSetsClosure(bool free_list_only, | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6431 HeapRegionSet* old_set, FreeRegionList* free_list) : |
4072 | 6432 _free_list_only(free_list_only), |
6433 _old_set(old_set), _free_list(free_list), _total_used(0) { | |
6434 assert(_free_list->is_empty(), "pre-condition"); | |
6435 if (!free_list_only) { | |
6436 assert(_old_set->is_empty(), "pre-condition"); | |
6437 } | |
6438 } | |
6439 | |
6440 bool doHeapRegion(HeapRegion* r) { | |
6441 if (r->continuesHumongous()) { | |
6442 return false; | |
6443 } | |
6444 | |
6445 if (r->is_empty()) { | |
6446 // Add free regions to the free list | |
6447 _free_list->add_as_tail(r); | |
6448 } else if (!_free_list_only) { | |
6449 assert(!r->is_young(), "we should not come across young regions"); | |
6450 | |
6451 if (r->isHumongous()) { | |
6452 // We ignore humongous regions, we left the humongous set unchanged | |
6453 } else { | |
6454 // The rest should be old, add them to the old set | |
6455 _old_set->add(r); | |
6456 } | |
6457 _total_used += r->used(); | |
6458 } | |
6459 | |
6460 return false; | |
6461 } | |
6462 | |
6463 size_t total_used() { | |
6464 return _total_used; | |
6465 } | |
6466 }; | |
6467 | |
6468 void G1CollectedHeap::rebuild_region_sets(bool free_list_only) { | |
6469 assert_at_safepoint(true /* should_be_vm_thread */); | |
6470 | |
17764 | 6471 if (!free_list_only) { |
6472 _young_list->empty_list(); | |
6473 } | |
6474 | |
4072 | 6475 RebuildRegionSetsClosure cl(free_list_only, &_old_set, &_free_list); |
6476 heap_region_iterate(&cl); | |
6477 | |
6478 if (!free_list_only) { | |
6479 _summary_bytes_used = cl.total_used(); | |
6480 } | |
6481 assert(_summary_bytes_used == recalculate_used(), | |
6482 err_msg("inconsistent _summary_bytes_used, " | |
6483 "value: "SIZE_FORMAT" recalculated: "SIZE_FORMAT, | |
6484 _summary_bytes_used, recalculate_used())); | |
342 | 6485 } |
6486 | |
6487 void G1CollectedHeap::set_refine_cte_cl_concurrency(bool concurrent) { | |
6488 _refine_cte_cl->set_concurrent(concurrent); | |
6489 } | |
6490 | |
6491 bool G1CollectedHeap::is_in_closed_subset(const void* p) const { | |
6492 HeapRegion* hr = heap_region_containing(p); | |
6493 if (hr == NULL) { | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
6494 return false; |
342 | 6495 } else { |
6496 return hr->is_in(p); | |
6497 } | |
6498 } | |
2152 | 6499 |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
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3824
diff
changeset
|
6500 // 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
|
6501 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6502 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
|
6503 bool force) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6504 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
|
6505 assert(!force || g1_policy()->can_expand_young_list(), |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6506 "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
|
6507 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
|
6508 if (force || !young_list_full) { |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6509 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
|
6510 false /* is_old */, |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6511 false /* do_expand */); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6512 if (new_alloc_region != NULL) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6513 set_region_short_lived_locked(new_alloc_region); |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6514 _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
|
6515 return new_alloc_region; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6516 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6517 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6518 return NULL; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6519 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6520 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6521 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
|
6522 size_t allocated_bytes) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6523 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
|
6524 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
|
6525 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6526 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
|
6527 _summary_bytes_used += allocated_bytes; |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6528 _hr_printer.retire(alloc_region); |
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6529 // 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
|
6530 // 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
|
6531 // used space has been recored in _summary_bytes_used. |
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6532 g1mm()->update_eden_size(); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6533 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6534 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6535 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
|
6536 bool force) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6537 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
|
6538 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6539 |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6540 void G1CollectedHeap::set_par_threads() { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6541 // 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
|
6542 // in the workgroup. |
4711 | 6543 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
|
6544 uint n_workers = workers()->active_workers(); |
4711 | 6545 assert(UseDynamicNumberOfGCThreads || |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6546 n_workers == workers()->total_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6547 "Otherwise should be using the total number of workers"); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6548 if (n_workers == 0) { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6549 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
|
6550 n_workers = ParallelGCThreads; |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6551 workers()->set_active_workers(n_workers); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6552 } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6553 set_par_threads(n_workers); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6554 } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6555 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6556 void MutatorAllocRegion::retire_region(HeapRegion* alloc_region, |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6557 size_t allocated_bytes) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6558 _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
|
6559 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6560 |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6561 // 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
|
6562 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6563 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
|
6564 uint count, |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6565 GCAllocPurpose ap) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6566 assert(FreeList_lock->owned_by_self(), "pre-condition"); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6567 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6568 if (count < g1_policy()->max_regions(ap)) { |
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
17759
diff
changeset
|
6569 bool survivor = (ap == GCAllocForSurvived); |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6570 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
|
6571 !survivor, |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6572 true /* do_expand */); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6573 if (new_alloc_region != NULL) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6574 // We really only need to do this for old regions given that we |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6575 // should never scan survivors. But it doesn't hurt to do it |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6576 // for survivors too. |
f44782f04dd4
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6577 new_alloc_region->set_saved_mark(); |
17773
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6578 if (survivor) { |
3830
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6579 new_alloc_region->set_survivor(); |
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6580 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Survivor); |
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6581 } else { |
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6582 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Old); |
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|
6583 } |
4787
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|
6584 bool during_im = g1_policy()->during_initial_mark_pause(); |
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6585 new_alloc_region->note_start_of_copying(during_im); |
3830
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6586 return new_alloc_region; |
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6587 } else { |
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6588 g1_policy()->note_alloc_region_limit_reached(ap); |
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6589 } |
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|
6590 } |
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|
6591 return NULL; |
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|
6592 } |
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|
6593 |
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6594 void G1CollectedHeap::retire_gc_alloc_region(HeapRegion* alloc_region, |
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6595 size_t allocated_bytes, |
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6596 GCAllocPurpose ap) { |
4787
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6597 bool during_im = g1_policy()->during_initial_mark_pause(); |
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6598 alloc_region->note_end_of_copying(during_im); |
3830
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6599 g1_policy()->record_bytes_copied_during_gc(allocated_bytes); |
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6600 if (ap == GCAllocForSurvived) { |
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6601 young_list()->add_survivor_region(alloc_region); |
4072 | 6602 } else { |
6603 _old_set.add(alloc_region); | |
3830
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|
6604 } |
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|
6605 _hr_printer.retire(alloc_region); |
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6606 } |
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|
6607 |
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6608 HeapRegion* SurvivorGCAllocRegion::allocate_new_region(size_t word_size, |
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6609 bool force) { |
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6610 assert(!force, "not supported for GC alloc regions"); |
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6611 return _g1h->new_gc_alloc_region(word_size, count(), GCAllocForSurvived); |
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|
6612 } |
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|
6613 |
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6614 void SurvivorGCAllocRegion::retire_region(HeapRegion* alloc_region, |
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6615 size_t allocated_bytes) { |
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6616 _g1h->retire_gc_alloc_region(alloc_region, allocated_bytes, |
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6617 GCAllocForSurvived); |
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|
6618 } |
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|
6619 |
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|
6620 HeapRegion* OldGCAllocRegion::allocate_new_region(size_t word_size, |
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6621 bool force) { |
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|
6622 assert(!force, "not supported for GC alloc regions"); |
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6623 return _g1h->new_gc_alloc_region(word_size, count(), GCAllocForTenured); |
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|
6624 } |
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|
6625 |
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|
6626 void OldGCAllocRegion::retire_region(HeapRegion* alloc_region, |
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|
6627 size_t allocated_bytes) { |
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|
6628 _g1h->retire_gc_alloc_region(alloc_region, allocated_bytes, |
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|
6629 GCAllocForTenured); |
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|
6630 } |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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diff
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|
6631 // Heap region set verification |
abdfc822206f
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|
6632 |
2152 | 6633 class VerifyRegionListsClosure : public HeapRegionClosure { |
6634 private: | |
17736
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|
6635 HeapRegionSet* _old_set; |
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|
6636 HeapRegionSet* _humongous_set; |
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|
6637 FreeRegionList* _free_list; |
2152 | 6638 |
6639 public: | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
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|
6640 HeapRegionSetCount _old_count; |
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|
6641 HeapRegionSetCount _humongous_count; |
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|
6642 HeapRegionSetCount _free_count; |
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|
6643 |
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|
6644 VerifyRegionListsClosure(HeapRegionSet* old_set, |
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|
6645 HeapRegionSet* humongous_set, |
2152 | 6646 FreeRegionList* free_list) : |
17736
58fc1b1523dc
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|
6647 _old_set(old_set), _humongous_set(humongous_set), _free_list(free_list), |
58fc1b1523dc
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|
6648 _old_count(), _humongous_count(), _free_count(){ } |
2152 | 6649 |
6650 bool doHeapRegion(HeapRegion* hr) { | |
6651 if (hr->continuesHumongous()) { | |
6652 return false; | |
6653 } | |
6654 | |
6655 if (hr->is_young()) { | |
6656 // TODO | |
6657 } else if (hr->startsHumongous()) { | |
17736
58fc1b1523dc
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brutisso
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|
6658 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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|
6659 _humongous_count.increment(1u, hr->capacity()); |
2152 | 6660 } else if (hr->is_empty()) { |
17736
58fc1b1523dc
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|
6661 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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|
6662 _free_count.increment(1u, hr->capacity()); |
4072 | 6663 } else { |
17736
58fc1b1523dc
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brutisso
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|
6664 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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|
6665 _old_count.increment(1u, hr->capacity()); |
2152 | 6666 } |
6667 return false; | |
6668 } | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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diff
changeset
|
6669 |
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diff
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|
6670 void verify_counts(HeapRegionSet* old_set, HeapRegionSet* humongous_set, FreeRegionList* free_list) { |
58fc1b1523dc
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|
6671 guarantee(old_set->length() == _old_count.length(), err_msg("Old set count mismatch. Expected %u, actual %u.", old_set->length(), _old_count.length())); |
58fc1b1523dc
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|
6672 guarantee(old_set->total_capacity_bytes() == _old_count.capacity(), err_msg("Old set capacity mismatch. Expected " SIZE_FORMAT ", actual " SIZE_FORMAT, |
58fc1b1523dc
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|
6673 old_set->total_capacity_bytes(), _old_count.capacity())); |
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|
6674 |
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|
6675 guarantee(humongous_set->length() == _humongous_count.length(), err_msg("Hum set count mismatch. Expected %u, actual %u.", humongous_set->length(), _humongous_count.length())); |
58fc1b1523dc
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|
6676 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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|
6677 humongous_set->total_capacity_bytes(), _humongous_count.capacity())); |
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|
6678 |
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|
6679 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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|
6680 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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|
6681 free_list->total_capacity_bytes(), _free_count.capacity())); |
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|
6682 } |
2152 | 6683 }; |
6684 | |
6010
720b6a76dd9d
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tonyp
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6008
diff
changeset
|
6685 HeapRegion* G1CollectedHeap::new_heap_region(uint hrs_index, |
3766 | 6686 HeapWord* bottom) { |
6687 HeapWord* end = bottom + HeapRegion::GrainWords; | |
6688 MemRegion mr(bottom, end); | |
6689 assert(_g1_reserved.contains(mr), "invariant"); | |
6690 // 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
|
6691 return new HeapRegion(hrs_index, _bot_shared, mr); |
3766 | 6692 } |
6693 | |
2152 | 6694 void G1CollectedHeap::verify_region_sets() { |
6695 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); | |
6696 | |
6697 // First, check the explicit lists. | |
17736
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brutisso
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|
6698 _free_list.verify_list(); |
2152 | 6699 { |
6700 // Given that a concurrent operation might be adding regions to | |
6701 // the secondary free list we have to take the lock before | |
6702 // verifying it. | |
6703 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
17736
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|
6704 _secondary_free_list.verify_list(); |
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|
6705 } |
2152 | 6706 |
6707 // If a concurrent region freeing operation is in progress it will | |
6708 // be difficult to correctly attributed any free regions we come | |
6709 // across to the correct free list given that they might belong to | |
6710 // one of several (free_list, secondary_free_list, any local lists, | |
6711 // etc.). So, if that's the case we will skip the rest of the | |
6712 // verification operation. Alternatively, waiting for the concurrent | |
6713 // operation to complete will have a non-trivial effect on the GC's | |
6714 // operation (no concurrent operation will last longer than the | |
6715 // interval between two calls to verification) and it might hide | |
6716 // any issues that we would like to catch during testing. | |
6717 if (free_regions_coming()) { | |
6718 return; | |
6719 } | |
6720 | |
2361 | 6721 // Make sure we append the secondary_free_list on the free_list so |
6722 // that all free regions we will come across can be safely | |
6723 // attributed to the free_list. | |
6724 append_secondary_free_list_if_not_empty_with_lock(); | |
2152 | 6725 |
6726 // Finally, make sure that the region accounting in the lists is | |
6727 // consistent with what we see in the heap. | |
6728 | |
4072 | 6729 VerifyRegionListsClosure cl(&_old_set, &_humongous_set, &_free_list); |
2152 | 6730 heap_region_iterate(&cl); |
17736
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|
6731 cl.verify_counts(&_old_set, &_humongous_set, &_free_list); |
342 | 6732 } |
12080 | 6733 |
6734 // Optimized nmethod scanning | |
6735 | |
6736 class RegisterNMethodOopClosure: public OopClosure { | |
6737 G1CollectedHeap* _g1h; | |
6738 nmethod* _nm; | |
6739 | |
6740 template <class T> void do_oop_work(T* p) { | |
6741 T heap_oop = oopDesc::load_heap_oop(p); | |
6742 if (!oopDesc::is_null(heap_oop)) { | |
6743 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
6744 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
13062
28674af341ac
8027756: assert(!hr->isHumongous()) failed: code root in humongous region?
tschatzl
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13060
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|
6745 assert(!hr->continuesHumongous(), |
28674af341ac
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tschatzl
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13060
diff
changeset
|
6746 err_msg("trying to add code root "PTR_FORMAT" in continuation of humongous region "HR_FORMAT |
28674af341ac
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tschatzl
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|
6747 " starting at "HR_FORMAT, |
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tschatzl
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13060
diff
changeset
|
6748 _nm, HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()))); |
12080 | 6749 |
6750 // HeapRegion::add_strong_code_root() avoids adding duplicate | |
6751 // entries but having duplicates is OK since we "mark" nmethods | |
6752 // as visited when we scan the strong code root lists during the GC. | |
6753 hr->add_strong_code_root(_nm); | |
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6754 assert(hr->rem_set()->strong_code_roots_list_contains(_nm), |
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6755 err_msg("failed to add code root "PTR_FORMAT" to remembered set of region "HR_FORMAT, |
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6756 _nm, HR_FORMAT_PARAMS(hr))); |
12080 | 6757 } |
6758 } | |
6759 | |
6760 public: | |
6761 RegisterNMethodOopClosure(G1CollectedHeap* g1h, nmethod* nm) : | |
6762 _g1h(g1h), _nm(nm) {} | |
6763 | |
6764 void do_oop(oop* p) { do_oop_work(p); } | |
6765 void do_oop(narrowOop* p) { do_oop_work(p); } | |
6766 }; | |
6767 | |
6768 class UnregisterNMethodOopClosure: public OopClosure { | |
6769 G1CollectedHeap* _g1h; | |
6770 nmethod* _nm; | |
6771 | |
6772 template <class T> void do_oop_work(T* p) { | |
6773 T heap_oop = oopDesc::load_heap_oop(p); | |
6774 if (!oopDesc::is_null(heap_oop)) { | |
6775 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
6776 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
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6777 assert(!hr->continuesHumongous(), |
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6778 err_msg("trying to remove code root "PTR_FORMAT" in continuation of humongous region "HR_FORMAT |
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6779 " starting at "HR_FORMAT, |
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6780 _nm, HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()))); |
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6781 |
12080 | 6782 hr->remove_strong_code_root(_nm); |
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6783 assert(!hr->rem_set()->strong_code_roots_list_contains(_nm), |
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6784 err_msg("failed to remove code root "PTR_FORMAT" of region "HR_FORMAT, |
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6785 _nm, HR_FORMAT_PARAMS(hr))); |
12080 | 6786 } |
6787 } | |
6788 | |
6789 public: | |
6790 UnregisterNMethodOopClosure(G1CollectedHeap* g1h, nmethod* nm) : | |
6791 _g1h(g1h), _nm(nm) {} | |
6792 | |
6793 void do_oop(oop* p) { do_oop_work(p); } | |
6794 void do_oop(narrowOop* p) { do_oop_work(p); } | |
6795 }; | |
6796 | |
6797 void G1CollectedHeap::register_nmethod(nmethod* nm) { | |
6798 CollectedHeap::register_nmethod(nm); | |
6799 | |
6800 guarantee(nm != NULL, "sanity"); | |
6801 RegisterNMethodOopClosure reg_cl(this, nm); | |
6802 nm->oops_do(®_cl); | |
6803 } | |
6804 | |
6805 void G1CollectedHeap::unregister_nmethod(nmethod* nm) { | |
6806 CollectedHeap::unregister_nmethod(nm); | |
6807 | |
6808 guarantee(nm != NULL, "sanity"); | |
6809 UnregisterNMethodOopClosure reg_cl(this, nm); | |
6810 nm->oops_do(®_cl, true); | |
6811 } | |
6812 | |
6813 class MigrateCodeRootsHeapRegionClosure: public HeapRegionClosure { | |
6814 public: | |
6815 bool doHeapRegion(HeapRegion *hr) { | |
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6816 assert(!hr->isHumongous(), |
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6817 err_msg("humongous region "HR_FORMAT" should not have been added to collection set", |
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6818 HR_FORMAT_PARAMS(hr))); |
12080 | 6819 hr->migrate_strong_code_roots(); |
6820 return false; | |
6821 } | |
6822 }; | |
6823 | |
6824 void G1CollectedHeap::migrate_strong_code_roots() { | |
6825 MigrateCodeRootsHeapRegionClosure cl; | |
6826 double migrate_start = os::elapsedTime(); | |
6827 collection_set_iterate(&cl); | |
6828 double migration_time_ms = (os::elapsedTime() - migrate_start) * 1000.0; | |
6829 g1_policy()->phase_times()->record_strong_code_root_migration_time(migration_time_ms); | |
6830 } | |
6831 | |
17753
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6832 void G1CollectedHeap::purge_code_root_memory() { |
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6833 double purge_start = os::elapsedTime(); |
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6834 G1CodeRootSet::purge_chunks(G1CodeRootsChunkCacheKeepPercent); |
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6835 double purge_time_ms = (os::elapsedTime() - purge_start) * 1000.0; |
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6836 g1_policy()->phase_times()->record_strong_code_root_purge_time(purge_time_ms); |
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6837 } |
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6838 |
12080 | 6839 // Mark all the code roots that point into regions *not* in the |
6840 // collection set. | |
6841 // | |
6842 // Note we do not want to use a "marking" CodeBlobToOopClosure while | |
6843 // walking the the code roots lists of regions not in the collection | |
6844 // set. Suppose we have an nmethod (M) that points to objects in two | |
6845 // separate regions - one in the collection set (R1) and one not (R2). | |
6846 // Using a "marking" CodeBlobToOopClosure here would result in "marking" | |
6847 // nmethod M when walking the code roots for R1. When we come to scan | |
6848 // the code roots for R2, we would see that M is already marked and it | |
6849 // would be skipped and the objects in R2 that are referenced from M | |
6850 // would not be evacuated. | |
6851 | |
6852 class MarkStrongCodeRootCodeBlobClosure: public CodeBlobClosure { | |
6853 | |
6854 class MarkStrongCodeRootOopClosure: public OopClosure { | |
6855 ConcurrentMark* _cm; | |
6856 HeapRegion* _hr; | |
6857 uint _worker_id; | |
6858 | |
6859 template <class T> void do_oop_work(T* p) { | |
6860 T heap_oop = oopDesc::load_heap_oop(p); | |
6861 if (!oopDesc::is_null(heap_oop)) { | |
6862 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
6863 // Only mark objects in the region (which is assumed | |
6864 // to be not in the collection set). | |
6865 if (_hr->is_in(obj)) { | |
6866 _cm->grayRoot(obj, (size_t) obj->size(), _worker_id); | |
6867 } | |
6868 } | |
6869 } | |
6870 | |
6871 public: | |
6872 MarkStrongCodeRootOopClosure(ConcurrentMark* cm, HeapRegion* hr, uint worker_id) : | |
6873 _cm(cm), _hr(hr), _worker_id(worker_id) { | |
6874 assert(!_hr->in_collection_set(), "sanity"); | |
6875 } | |
6876 | |
6877 void do_oop(narrowOop* p) { do_oop_work(p); } | |
6878 void do_oop(oop* p) { do_oop_work(p); } | |
6879 }; | |
6880 | |
6881 MarkStrongCodeRootOopClosure _oop_cl; | |
6882 | |
6883 public: | |
6884 MarkStrongCodeRootCodeBlobClosure(ConcurrentMark* cm, HeapRegion* hr, uint worker_id): | |
6885 _oop_cl(cm, hr, worker_id) {} | |
6886 | |
6887 void do_code_blob(CodeBlob* cb) { | |
6888 nmethod* nm = (cb == NULL) ? NULL : cb->as_nmethod_or_null(); | |
6889 if (nm != NULL) { | |
6890 nm->oops_do(&_oop_cl); | |
6891 } | |
6892 } | |
6893 }; | |
6894 | |
6895 class MarkStrongCodeRootsHRClosure: public HeapRegionClosure { | |
6896 G1CollectedHeap* _g1h; | |
6897 uint _worker_id; | |
6898 | |
6899 public: | |
6900 MarkStrongCodeRootsHRClosure(G1CollectedHeap* g1h, uint worker_id) : | |
6901 _g1h(g1h), _worker_id(worker_id) {} | |
6902 | |
6903 bool doHeapRegion(HeapRegion *hr) { | |
6904 HeapRegionRemSet* hrrs = hr->rem_set(); | |
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6905 if (hr->continuesHumongous()) { |
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6906 // Code roots should never be attached to a continuation of a humongous region |
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6907 assert(hrrs->strong_code_roots_list_length() == 0, |
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6908 err_msg("code roots should never be attached to continuations of humongous region "HR_FORMAT |
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6909 " starting at "HR_FORMAT", but has "SIZE_FORMAT, |
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6910 HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()), |
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6911 hrrs->strong_code_roots_list_length())); |
12080 | 6912 return false; |
6913 } | |
6914 | |
6915 if (hr->in_collection_set()) { | |
6916 // Don't mark code roots into regions in the collection set here. | |
6917 // They will be marked when we scan them. | |
6918 return false; | |
6919 } | |
6920 | |
6921 MarkStrongCodeRootCodeBlobClosure cb_cl(_g1h->concurrent_mark(), hr, _worker_id); | |
6922 hr->strong_code_roots_do(&cb_cl); | |
6923 return false; | |
6924 } | |
6925 }; | |
6926 | |
6927 void G1CollectedHeap::mark_strong_code_roots(uint worker_id) { | |
6928 MarkStrongCodeRootsHRClosure cl(this, worker_id); | |
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6929 if (G1CollectedHeap::use_parallel_gc_threads()) { |
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6930 heap_region_par_iterate_chunked(&cl, |
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6931 worker_id, |
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6932 workers()->active_workers(), |
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6933 HeapRegion::ParMarkRootClaimValue); |
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6934 } else { |
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6935 heap_region_iterate(&cl); |
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6936 } |
12080 | 6937 } |
6938 | |
6939 class RebuildStrongCodeRootClosure: public CodeBlobClosure { | |
6940 G1CollectedHeap* _g1h; | |
6941 | |
6942 public: | |
6943 RebuildStrongCodeRootClosure(G1CollectedHeap* g1h) : | |
6944 _g1h(g1h) {} | |
6945 | |
6946 void do_code_blob(CodeBlob* cb) { | |
6947 nmethod* nm = (cb != NULL) ? cb->as_nmethod_or_null() : NULL; | |
6948 if (nm == NULL) { | |
6949 return; | |
6950 } | |
6951 | |
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6952 if (ScavengeRootsInCode) { |
12080 | 6953 _g1h->register_nmethod(nm); |
6954 } | |
6955 } | |
6956 }; | |
6957 | |
6958 void G1CollectedHeap::rebuild_strong_code_roots() { | |
6959 RebuildStrongCodeRootClosure blob_cl(this); | |
6960 CodeCache::blobs_do(&blob_cl); | |
6961 } |