Mercurial > hg > graal-jvmci-8
annotate src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp @ 20212:d7e2d5f2846b
8027553: Change the in_cset_fast_test functionality to use the G1BiasedArray abstraction
Summary: Instead of using a manually managed array for the in_cset_fast_test array, use a G1BiasedArray instance.
Reviewed-by: brutisso, mgerdin
author | tschatzl |
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date | Mon, 21 Jul 2014 09:40:19 +0200 |
parents | c49dcaf78a65 |
children | 983092f35ff7 |
rev | line source |
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342 | 1 /* |
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2 * Copyright (c) 2001, 2014, Oracle and/or its affiliates. All rights reserved. |
342 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
342 | 22 * |
23 */ | |
24 | |
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25 #if !defined(__clang_major__) && defined(__GNUC__) |
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26 #define ATTRIBUTE_PRINTF(x,y) // FIXME, formats are a mess. |
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27 #endif |
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28 |
1972 | 29 #include "precompiled.hpp" |
12080 | 30 #include "code/codeCache.hpp" |
1972 | 31 #include "code/icBuffer.hpp" |
32 #include "gc_implementation/g1/bufferingOopClosure.hpp" | |
33 #include "gc_implementation/g1/concurrentG1Refine.hpp" | |
34 #include "gc_implementation/g1/concurrentG1RefineThread.hpp" | |
35 #include "gc_implementation/g1/concurrentMarkThread.inline.hpp" | |
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36 #include "gc_implementation/g1/g1AllocRegion.inline.hpp" |
1972 | 37 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" |
38 #include "gc_implementation/g1/g1CollectorPolicy.hpp" | |
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39 #include "gc_implementation/g1/g1ErgoVerbose.hpp" |
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40 #include "gc_implementation/g1/g1EvacFailure.hpp" |
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41 #include "gc_implementation/g1/g1GCPhaseTimes.hpp" |
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42 #include "gc_implementation/g1/g1Log.hpp" |
1972 | 43 #include "gc_implementation/g1/g1MarkSweep.hpp" |
44 #include "gc_implementation/g1/g1OopClosures.inline.hpp" | |
45 #include "gc_implementation/g1/g1RemSet.inline.hpp" | |
17764 | 46 #include "gc_implementation/g1/g1StringDedup.hpp" |
10405 | 47 #include "gc_implementation/g1/g1YCTypes.hpp" |
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48 #include "gc_implementation/g1/heapRegion.inline.hpp" |
1972 | 49 #include "gc_implementation/g1/heapRegionRemSet.hpp" |
50 #include "gc_implementation/g1/heapRegionSeq.inline.hpp" | |
51 #include "gc_implementation/g1/vm_operations_g1.hpp" | |
10405 | 52 #include "gc_implementation/shared/gcHeapSummary.hpp" |
53 #include "gc_implementation/shared/gcTimer.hpp" | |
54 #include "gc_implementation/shared/gcTrace.hpp" | |
55 #include "gc_implementation/shared/gcTraceTime.hpp" | |
1972 | 56 #include "gc_implementation/shared/isGCActiveMark.hpp" |
57 #include "memory/gcLocker.inline.hpp" | |
58 #include "memory/generationSpec.hpp" | |
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59 #include "memory/iterator.hpp" |
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60 #include "memory/referenceProcessor.hpp" |
1972 | 61 #include "oops/oop.inline.hpp" |
62 #include "oops/oop.pcgc.inline.hpp" | |
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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. | |
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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
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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 } |
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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); |
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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 |
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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
0982ec23da03
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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.
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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
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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_cset_fast_test(); |
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1515 |
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1516 init_mutator_alloc_region(); |
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1517 |
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1518 double end = os::elapsedTime(); |
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1519 g1_policy()->record_full_collection_end(); |
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1520 |
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1521 if (G1Log::fine()) { |
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1522 g1_policy()->print_heap_transition(); |
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1523 } |
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1524 |
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1525 // We must call G1MonitoringSupport::update_sizes() in the same scoping level |
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1526 // as an active TraceMemoryManagerStats object (i.e. before the destructor for the |
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1527 // TraceMemoryManagerStats is called) so that the G1 memory pools are updated |
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1528 // before any GC notifications are raised. |
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1529 g1mm()->update_sizes(); |
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1530 |
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1531 gc_epilogue(true); |
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1532 } |
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1533 |
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1534 if (G1Log::finer()) { |
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1535 g1_policy()->print_detailed_heap_transition(true /* full */); |
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1536 } |
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1537 |
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1538 print_heap_after_gc(); |
10405 | 1539 trace_heap_after_gc(gc_tracer); |
1540 | |
1541 post_full_gc_dump(gc_timer); | |
1542 | |
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1543 gc_timer->register_gc_end(); |
10405 | 1544 gc_tracer->report_gc_end(gc_timer->gc_end(), gc_timer->time_partitions()); |
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1545 } |
1973 | 1546 |
1547 return true; | |
342 | 1548 } |
1549 | |
1550 void G1CollectedHeap::do_full_collection(bool clear_all_soft_refs) { | |
1973 | 1551 // do_collection() will return whether it succeeded in performing |
1552 // the GC. Currently, there is no facility on the | |
1553 // do_full_collection() API to notify the caller than the collection | |
1554 // did not succeed (e.g., because it was locked out by the GC | |
1555 // locker). So, right now, we'll ignore the return value. | |
1556 bool dummy = do_collection(true, /* explicit_gc */ | |
1557 clear_all_soft_refs, | |
1558 0 /* word_size */); | |
342 | 1559 } |
1560 | |
1561 // This code is mostly copied from TenuredGeneration. | |
1562 void | |
1563 G1CollectedHeap:: | |
1564 resize_if_necessary_after_full_collection(size_t word_size) { | |
1565 // Include the current allocation, if any, and bytes that will be | |
1566 // pre-allocated to support collections, as "used". | |
1567 const size_t used_after_gc = used(); | |
1568 const size_t capacity_after_gc = capacity(); | |
1569 const size_t free_after_gc = capacity_after_gc - used_after_gc; | |
1570 | |
1717
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1571 // This is enforced in arguments.cpp. |
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1572 assert(MinHeapFreeRatio <= MaxHeapFreeRatio, |
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1573 "otherwise the code below doesn't make sense"); |
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1574 |
342 | 1575 // We don't have floating point command-line arguments |
1717
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1576 const double minimum_free_percentage = (double) MinHeapFreeRatio / 100.0; |
342 | 1577 const double maximum_used_percentage = 1.0 - minimum_free_percentage; |
1717
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1578 const double maximum_free_percentage = (double) MaxHeapFreeRatio / 100.0; |
342 | 1579 const double minimum_used_percentage = 1.0 - maximum_free_percentage; |
1580 | |
1717
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1581 const size_t min_heap_size = collector_policy()->min_heap_byte_size(); |
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1582 const size_t max_heap_size = collector_policy()->max_heap_byte_size(); |
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1583 |
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1584 // We have to be careful here as these two calculations can overflow |
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1585 // 32-bit size_t's. |
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1586 double used_after_gc_d = (double) used_after_gc; |
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1587 double minimum_desired_capacity_d = used_after_gc_d / maximum_used_percentage; |
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1588 double maximum_desired_capacity_d = used_after_gc_d / minimum_used_percentage; |
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1589 |
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1590 // Let's make sure that they are both under the max heap size, which |
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1591 // by default will make them fit into a size_t. |
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1592 double desired_capacity_upper_bound = (double) max_heap_size; |
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1593 minimum_desired_capacity_d = MIN2(minimum_desired_capacity_d, |
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1594 desired_capacity_upper_bound); |
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1595 maximum_desired_capacity_d = MIN2(maximum_desired_capacity_d, |
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1596 desired_capacity_upper_bound); |
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1597 |
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1598 // We can now safely turn them into size_t's. |
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1599 size_t minimum_desired_capacity = (size_t) minimum_desired_capacity_d; |
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1600 size_t maximum_desired_capacity = (size_t) maximum_desired_capacity_d; |
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1601 |
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1602 // This assert only makes sense here, before we adjust them |
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1603 // with respect to the min and max heap size. |
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1604 assert(minimum_desired_capacity <= maximum_desired_capacity, |
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1605 err_msg("minimum_desired_capacity = "SIZE_FORMAT", " |
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1606 "maximum_desired_capacity = "SIZE_FORMAT, |
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1607 minimum_desired_capacity, maximum_desired_capacity)); |
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1608 |
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1609 // Should not be greater than the heap max size. No need to adjust |
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1610 // it with respect to the heap min size as it's a lower bound (i.e., |
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1611 // we'll try to make the capacity larger than it, not smaller). |
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1612 minimum_desired_capacity = MIN2(minimum_desired_capacity, max_heap_size); |
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1613 // Should not be less than the heap min size. No need to adjust it |
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1614 // with respect to the heap max size as it's an upper bound (i.e., |
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1615 // we'll try to make the capacity smaller than it, not greater). |
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1616 maximum_desired_capacity = MAX2(maximum_desired_capacity, min_heap_size); |
342 | 1617 |
1717
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1618 if (capacity_after_gc < minimum_desired_capacity) { |
342 | 1619 // Don't expand unless it's significant |
1620 size_t expand_bytes = minimum_desired_capacity - capacity_after_gc; | |
3914
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1621 ergo_verbose4(ErgoHeapSizing, |
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1622 "attempt heap expansion", |
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1623 ergo_format_reason("capacity lower than " |
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1624 "min desired capacity after Full GC") |
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1625 ergo_format_byte("capacity") |
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1626 ergo_format_byte("occupancy") |
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1627 ergo_format_byte_perc("min desired capacity"), |
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1628 capacity_after_gc, used_after_gc, |
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1629 minimum_desired_capacity, (double) MinHeapFreeRatio); |
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1630 expand(expand_bytes); |
342 | 1631 |
1632 // No expansion, now see if we want to shrink | |
1717
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1633 } else if (capacity_after_gc > maximum_desired_capacity) { |
342 | 1634 // Capacity too large, compute shrinking size |
1635 size_t shrink_bytes = capacity_after_gc - maximum_desired_capacity; | |
3914
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1636 ergo_verbose4(ErgoHeapSizing, |
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1637 "attempt heap shrinking", |
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1638 ergo_format_reason("capacity higher than " |
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1639 "max desired capacity after Full GC") |
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1640 ergo_format_byte("capacity") |
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1641 ergo_format_byte("occupancy") |
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1642 ergo_format_byte_perc("max desired capacity"), |
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1643 capacity_after_gc, used_after_gc, |
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1644 maximum_desired_capacity, (double) MaxHeapFreeRatio); |
342 | 1645 shrink(shrink_bytes); |
1646 } | |
1647 } | |
1648 | |
1649 | |
1650 HeapWord* | |
1973 | 1651 G1CollectedHeap::satisfy_failed_allocation(size_t word_size, |
1652 bool* succeeded) { | |
2152 | 1653 assert_at_safepoint(true /* should_be_vm_thread */); |
1973 | 1654 |
1655 *succeeded = true; | |
1656 // Let's attempt the allocation first. | |
2433
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1657 HeapWord* result = |
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1658 attempt_allocation_at_safepoint(word_size, |
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1659 false /* expect_null_mutator_alloc_region */); |
1973 | 1660 if (result != NULL) { |
1661 assert(*succeeded, "sanity"); | |
1662 return result; | |
1663 } | |
342 | 1664 |
1665 // In a G1 heap, we're supposed to keep allocation from failing by | |
1666 // incremental pauses. Therefore, at least for now, we'll favor | |
1667 // expansion over collection. (This might change in the future if we can | |
1668 // do something smarter than full collection to satisfy a failed alloc.) | |
1669 result = expand_and_allocate(word_size); | |
1670 if (result != NULL) { | |
1973 | 1671 assert(*succeeded, "sanity"); |
342 | 1672 return result; |
1673 } | |
1674 | |
1973 | 1675 // Expansion didn't work, we'll try to do a Full GC. |
1676 bool gc_succeeded = do_collection(false, /* explicit_gc */ | |
1677 false, /* clear_all_soft_refs */ | |
1678 word_size); | |
1679 if (!gc_succeeded) { | |
1680 *succeeded = false; | |
1681 return NULL; | |
1682 } | |
1683 | |
1684 // Retry the allocation | |
1685 result = attempt_allocation_at_safepoint(word_size, | |
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1686 true /* expect_null_mutator_alloc_region */); |
342 | 1687 if (result != NULL) { |
1973 | 1688 assert(*succeeded, "sanity"); |
342 | 1689 return result; |
1690 } | |
1691 | |
1973 | 1692 // Then, try a Full GC that will collect all soft references. |
1693 gc_succeeded = do_collection(false, /* explicit_gc */ | |
1694 true, /* clear_all_soft_refs */ | |
1695 word_size); | |
1696 if (!gc_succeeded) { | |
1697 *succeeded = false; | |
1698 return NULL; | |
1699 } | |
1700 | |
1701 // Retry the allocation once more | |
1702 result = attempt_allocation_at_safepoint(word_size, | |
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1703 true /* expect_null_mutator_alloc_region */); |
342 | 1704 if (result != NULL) { |
1973 | 1705 assert(*succeeded, "sanity"); |
342 | 1706 return result; |
1707 } | |
1708 | |
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1709 assert(!collector_policy()->should_clear_all_soft_refs(), |
1973 | 1710 "Flag should have been handled and cleared prior to this point"); |
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1711 |
342 | 1712 // What else? We might try synchronous finalization later. If the total |
1713 // space available is large enough for the allocation, then a more | |
1714 // complete compaction phase than we've tried so far might be | |
1715 // appropriate. | |
1973 | 1716 assert(*succeeded, "sanity"); |
342 | 1717 return NULL; |
1718 } | |
1719 | |
1720 // Attempting to expand the heap sufficiently | |
1721 // to support an allocation of the given "word_size". If | |
1722 // successful, perform the allocation and return the address of the | |
1723 // allocated block, or else "NULL". | |
1724 | |
1725 HeapWord* G1CollectedHeap::expand_and_allocate(size_t word_size) { | |
2152 | 1726 assert_at_safepoint(true /* should_be_vm_thread */); |
1727 | |
1728 verify_region_sets_optional(); | |
1973 | 1729 |
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1730 size_t expand_bytes = MAX2(word_size * HeapWordSize, MinHeapDeltaBytes); |
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1731 ergo_verbose1(ErgoHeapSizing, |
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1732 "attempt heap expansion", |
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1733 ergo_format_reason("allocation request failed") |
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1734 ergo_format_byte("allocation request"), |
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1735 word_size * HeapWordSize); |
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1736 if (expand(expand_bytes)) { |
3766 | 1737 _hrs.verify_optional(); |
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1738 verify_region_sets_optional(); |
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1739 return attempt_allocation_at_safepoint(word_size, |
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1740 false /* expect_null_mutator_alloc_region */); |
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1741 } |
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1742 return NULL; |
342 | 1743 } |
1744 | |
3766 | 1745 void G1CollectedHeap::update_committed_space(HeapWord* old_end, |
1746 HeapWord* new_end) { | |
1747 assert(old_end != new_end, "don't call this otherwise"); | |
1748 assert((HeapWord*) _g1_storage.high() == new_end, "invariant"); | |
1749 | |
1750 // Update the committed mem region. | |
1751 _g1_committed.set_end(new_end); | |
1752 // Tell the card table about the update. | |
1753 Universe::heap()->barrier_set()->resize_covered_region(_g1_committed); | |
1754 // Tell the BOT about the update. | |
1755 _bot_shared->resize(_g1_committed.word_size()); | |
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1756 // Tell the hot card cache about the update |
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1757 _cg1r->hot_card_cache()->resize_card_counts(capacity()); |
3766 | 1758 } |
1759 | |
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1760 bool G1CollectedHeap::expand(size_t expand_bytes) { |
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1761 size_t aligned_expand_bytes = ReservedSpace::page_align_size_up(expand_bytes); |
342 | 1762 aligned_expand_bytes = align_size_up(aligned_expand_bytes, |
1763 HeapRegion::GrainBytes); | |
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1764 ergo_verbose2(ErgoHeapSizing, |
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1765 "expand the heap", |
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1766 ergo_format_byte("requested expansion amount") |
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1767 ergo_format_byte("attempted expansion amount"), |
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1768 expand_bytes, aligned_expand_bytes); |
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1769 |
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1770 if (_g1_storage.uncommitted_size() == 0) { |
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1771 ergo_verbose0(ErgoHeapSizing, |
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1772 "did not expand the heap", |
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1773 ergo_format_reason("heap already fully expanded")); |
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1774 return false; |
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1775 } |
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1776 |
3766 | 1777 // First commit the memory. |
1778 HeapWord* old_end = (HeapWord*) _g1_storage.high(); | |
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1779 bool successful = _g1_storage.expand_by(aligned_expand_bytes); |
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1780 if (successful) { |
3766 | 1781 // Then propagate this update to the necessary data structures. |
1782 HeapWord* new_end = (HeapWord*) _g1_storage.high(); | |
1783 update_committed_space(old_end, new_end); | |
1784 | |
1785 FreeRegionList expansion_list("Local Expansion List"); | |
1786 MemRegion mr = _hrs.expand_by(old_end, new_end, &expansion_list); | |
1787 assert(mr.start() == old_end, "post-condition"); | |
1788 // mr might be a smaller region than what was requested if | |
1789 // expand_by() was unable to allocate the HeapRegion instances | |
1790 assert(mr.end() <= new_end, "post-condition"); | |
1791 | |
1792 size_t actual_expand_bytes = mr.byte_size(); | |
1793 assert(actual_expand_bytes <= aligned_expand_bytes, "post-condition"); | |
1794 assert(actual_expand_bytes == expansion_list.total_capacity_bytes(), | |
1795 "post-condition"); | |
1796 if (actual_expand_bytes < aligned_expand_bytes) { | |
1797 // We could not expand _hrs to the desired size. In this case we | |
1798 // need to shrink the committed space accordingly. | |
1799 assert(mr.end() < new_end, "invariant"); | |
1800 | |
1801 size_t diff_bytes = aligned_expand_bytes - actual_expand_bytes; | |
1802 // First uncommit the memory. | |
1803 _g1_storage.shrink_by(diff_bytes); | |
1804 // Then propagate this update to the necessary data structures. | |
1805 update_committed_space(new_end, mr.end()); | |
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1806 } |
3766 | 1807 _free_list.add_as_tail(&expansion_list); |
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1808 |
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1809 if (_hr_printer.is_active()) { |
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1810 HeapWord* curr = mr.start(); |
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1811 while (curr < mr.end()) { |
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1812 HeapWord* curr_end = curr + HeapRegion::GrainWords; |
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1813 _hr_printer.commit(curr, curr_end); |
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1814 curr = curr_end; |
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1815 } |
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1816 assert(curr == mr.end(), "post-condition"); |
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1817 } |
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1818 g1_policy()->record_new_heap_size(n_regions()); |
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1819 } else { |
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1820 ergo_verbose0(ErgoHeapSizing, |
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1821 "did not expand the heap", |
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1822 ergo_format_reason("heap expansion operation failed")); |
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1823 // The expansion of the virtual storage space was unsuccessful. |
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1824 // Let's see if it was because we ran out of swap. |
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1825 if (G1ExitOnExpansionFailure && |
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1826 _g1_storage.uncommitted_size() >= aligned_expand_bytes) { |
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1827 // We had head room... |
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1828 vm_exit_out_of_memory(aligned_expand_bytes, OOM_MMAP_ERROR, "G1 heap expansion"); |
342 | 1829 } |
1830 } | |
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1831 return successful; |
342 | 1832 } |
1833 | |
3766 | 1834 void G1CollectedHeap::shrink_helper(size_t shrink_bytes) { |
342 | 1835 size_t aligned_shrink_bytes = |
1836 ReservedSpace::page_align_size_down(shrink_bytes); | |
1837 aligned_shrink_bytes = align_size_down(aligned_shrink_bytes, | |
1838 HeapRegion::GrainBytes); | |
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1839 uint num_regions_to_remove = (uint)(shrink_bytes / HeapRegion::GrainBytes); |
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1840 |
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1841 uint num_regions_removed = _hrs.shrink_by(num_regions_to_remove); |
3766 | 1842 HeapWord* old_end = (HeapWord*) _g1_storage.high(); |
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1843 size_t shrunk_bytes = num_regions_removed * HeapRegion::GrainBytes; |
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1844 |
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1845 ergo_verbose3(ErgoHeapSizing, |
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1846 "shrink the heap", |
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1847 ergo_format_byte("requested shrinking amount") |
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1848 ergo_format_byte("aligned shrinking amount") |
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1849 ergo_format_byte("attempted shrinking amount"), |
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1850 shrink_bytes, aligned_shrink_bytes, shrunk_bytes); |
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1851 if (num_regions_removed > 0) { |
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1852 _g1_storage.shrink_by(shrunk_bytes); |
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1853 HeapWord* new_end = (HeapWord*) _g1_storage.high(); |
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1854 |
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1855 if (_hr_printer.is_active()) { |
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1856 HeapWord* curr = old_end; |
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1857 while (curr > new_end) { |
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1858 HeapWord* curr_end = curr; |
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1859 curr -= HeapRegion::GrainWords; |
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1860 _hr_printer.uncommit(curr, curr_end); |
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1861 } |
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1862 } |
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1863 |
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1864 _expansion_regions += num_regions_removed; |
3766 | 1865 update_committed_space(old_end, new_end); |
1866 HeapRegionRemSet::shrink_heap(n_regions()); | |
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1867 g1_policy()->record_new_heap_size(n_regions()); |
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1868 } else { |
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1869 ergo_verbose0(ErgoHeapSizing, |
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1870 "did not shrink the heap", |
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1871 ergo_format_reason("heap shrinking operation failed")); |
342 | 1872 } |
1873 } | |
1874 | |
1875 void G1CollectedHeap::shrink(size_t shrink_bytes) { | |
2152 | 1876 verify_region_sets_optional(); |
1877 | |
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1878 // We should only reach here at the end of a Full GC which means we |
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1879 // should not not be holding to any GC alloc regions. The method |
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1880 // below will make sure of that and do any remaining clean up. |
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1881 abandon_gc_alloc_regions(); |
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1882 |
2152 | 1883 // Instead of tearing down / rebuilding the free lists here, we |
1884 // could instead use the remove_all_pending() method on free_list to | |
1885 // remove only the ones that we need to remove. | |
4072 | 1886 tear_down_region_sets(true /* free_list_only */); |
342 | 1887 shrink_helper(shrink_bytes); |
4072 | 1888 rebuild_region_sets(true /* free_list_only */); |
2152 | 1889 |
3766 | 1890 _hrs.verify_optional(); |
2152 | 1891 verify_region_sets_optional(); |
342 | 1892 } |
1893 | |
1894 // Public methods. | |
1895 | |
1896 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away | |
1897 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list | |
1898 #endif // _MSC_VER | |
1899 | |
1900 | |
1901 G1CollectedHeap::G1CollectedHeap(G1CollectorPolicy* policy_) : | |
1902 SharedHeap(policy_), | |
1903 _g1_policy(policy_), | |
1111 | 1904 _dirty_card_queue_set(false), |
1705 | 1905 _into_cset_dirty_card_queue_set(false), |
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1906 _is_alive_closure_cm(this), |
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1907 _is_alive_closure_stw(this), |
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1908 _ref_processor_cm(NULL), |
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1909 _ref_processor_stw(NULL), |
342 | 1910 _process_strong_tasks(new SubTasksDone(G1H_PS_NumElements)), |
1911 _bot_shared(NULL), | |
10405 | 1912 _evac_failure_scan_stack(NULL), |
342 | 1913 _mark_in_progress(false), |
2152 | 1914 _cg1r(NULL), _summary_bytes_used(0), |
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1915 _g1mm(NULL), |
342 | 1916 _refine_cte_cl(NULL), |
1917 _full_collection(false), | |
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1918 _free_list("Master Free List", new MasterFreeRegionListMtSafeChecker()), |
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1919 _secondary_free_list("Secondary Free List", new SecondaryFreeRegionListMtSafeChecker()), |
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1920 _old_set("Old Set", false /* humongous */, new OldRegionSetMtSafeChecker()), |
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1921 _humongous_set("Master Humongous Set", true /* humongous */, new HumongousRegionSetMtSafeChecker()), |
2152 | 1922 _free_regions_coming(false), |
342 | 1923 _young_list(new YoungList(this)), |
1924 _gc_time_stamp(0), | |
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1925 _retained_old_gc_alloc_region(NULL), |
6595 | 1926 _survivor_plab_stats(YoungPLABSize, PLABWeight), |
1927 _old_plab_stats(OldPLABSize, PLABWeight), | |
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1928 _expand_heap_after_alloc_failure(true), |
526 | 1929 _surviving_young_words(NULL), |
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1930 _old_marking_cycles_started(0), |
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1931 _old_marking_cycles_completed(0), |
10405 | 1932 _concurrent_cycle_started(false), |
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1933 _in_cset_fast_test(), |
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1934 _dirty_cards_region_list(NULL), |
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1935 _worker_cset_start_region(NULL), |
10405 | 1936 _worker_cset_start_region_time_stamp(NULL), |
1937 _gc_timer_stw(new (ResourceObj::C_HEAP, mtGC) STWGCTimer()), | |
1938 _gc_timer_cm(new (ResourceObj::C_HEAP, mtGC) ConcurrentGCTimer()), | |
1939 _gc_tracer_stw(new (ResourceObj::C_HEAP, mtGC) G1NewTracer()), | |
1940 _gc_tracer_cm(new (ResourceObj::C_HEAP, mtGC) G1OldTracer()) { | |
1941 | |
1942 _g1h = this; | |
342 | 1943 if (_process_strong_tasks == NULL || !_process_strong_tasks->valid()) { |
1944 vm_exit_during_initialization("Failed necessary allocation."); | |
1945 } | |
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1946 |
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1947 _humongous_object_threshold_in_words = HeapRegion::GrainWords / 2; |
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1948 |
342 | 1949 int n_queues = MAX2((int)ParallelGCThreads, 1); |
1950 _task_queues = new RefToScanQueueSet(n_queues); | |
1951 | |
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1952 uint n_rem_sets = HeapRegionRemSet::num_par_rem_sets(); |
342 | 1953 assert(n_rem_sets > 0, "Invariant."); |
1954 | |
6197 | 1955 _worker_cset_start_region = NEW_C_HEAP_ARRAY(HeapRegion*, n_queues, mtGC); |
1956 _worker_cset_start_region_time_stamp = NEW_C_HEAP_ARRAY(unsigned int, n_queues, mtGC); | |
10405 | 1957 _evacuation_failed_info_array = NEW_C_HEAP_ARRAY(EvacuationFailedInfo, n_queues, mtGC); |
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1958 |
342 | 1959 for (int i = 0; i < n_queues; i++) { |
1960 RefToScanQueue* q = new RefToScanQueue(); | |
1961 q->initialize(); | |
1962 _task_queues->register_queue(i, q); | |
10405 | 1963 ::new (&_evacuation_failed_info_array[i]) EvacuationFailedInfo(); |
1964 } | |
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1965 clear_cset_start_regions(); |
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1966 |
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1967 // Initialize the G1EvacuationFailureALot counters and flags. |
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1968 NOT_PRODUCT(reset_evacuation_should_fail();) |
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1969 |
342 | 1970 guarantee(_task_queues != NULL, "task_queues allocation failure."); |
1971 } | |
1972 | |
1973 jint G1CollectedHeap::initialize() { | |
1166 | 1974 CollectedHeap::pre_initialize(); |
342 | 1975 os::enable_vtime(); |
1976 | |
6007
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1977 G1Log::init(); |
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1978 |
342 | 1979 // Necessary to satisfy locking discipline assertions. |
1980 | |
1981 MutexLocker x(Heap_lock); | |
1982 | |
3778
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1983 // We have to initialize the printer before committing the heap, as |
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1984 // it will be used then. |
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1985 _hr_printer.set_active(G1PrintHeapRegions); |
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1986 |
342 | 1987 // While there are no constraints in the GC code that HeapWordSize |
1988 // be any particular value, there are multiple other areas in the | |
1989 // system which believe this to be true (e.g. oop->object_size in some | |
1990 // cases incorrectly returns the size in wordSize units rather than | |
1991 // HeapWordSize). | |
1992 guarantee(HeapWordSize == wordSize, "HeapWordSize must equal wordSize"); | |
1993 | |
1994 size_t init_byte_size = collector_policy()->initial_heap_byte_size(); | |
1995 size_t max_byte_size = collector_policy()->max_heap_byte_size(); | |
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1996 size_t heap_alignment = collector_policy()->heap_alignment(); |
342 | 1997 |
1998 // Ensure that the sizes are properly aligned. | |
1999 Universe::check_alignment(init_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
2000 Universe::check_alignment(max_byte_size, HeapRegion::GrainBytes, "g1 heap"); | |
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2001 Universe::check_alignment(max_byte_size, heap_alignment, "g1 heap"); |
342 | 2002 |
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2003 _cg1r = new ConcurrentG1Refine(this); |
342 | 2004 |
2005 // Reserve the maximum. | |
642
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2006 |
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2007 // When compressed oops are enabled, the preferred heap base |
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2008 // is calculated by subtracting the requested size from the |
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2009 // 32Gb boundary and using the result as the base address for |
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2010 // heap reservation. If the requested size is not aligned to |
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2011 // HeapRegion::GrainBytes (i.e. the alignment that is passed |
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2012 // into the ReservedHeapSpace constructor) then the actual |
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2013 // base of the reserved heap may end up differing from the |
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2014 // address that was requested (i.e. the preferred heap base). |
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2015 // If this happens then we could end up using a non-optimal |
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2016 // compressed oops mode. |
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2017 |
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2018 ReservedSpace heap_rs = Universe::reserve_heap(max_byte_size, |
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2019 heap_alignment); |
342 | 2020 |
2021 // It is important to do this in a way such that concurrent readers can't | |
10405 | 2022 // temporarily think something is in the heap. (I've actually seen this |
342 | 2023 // happen in asserts: DLD.) |
2024 _reserved.set_word_size(0); | |
2025 _reserved.set_start((HeapWord*)heap_rs.base()); | |
2026 _reserved.set_end((HeapWord*)(heap_rs.base() + heap_rs.size())); | |
2027 | |
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2028 _expansion_regions = (uint) (max_byte_size / HeapRegion::GrainBytes); |
342 | 2029 |
2030 // Create the gen rem set (and barrier set) for the entire reserved region. | |
2031 _rem_set = collector_policy()->create_rem_set(_reserved, 2); | |
2032 set_barrier_set(rem_set()->bs()); | |
12343 | 2033 if (!barrier_set()->is_a(BarrierSet::G1SATBCTLogging)) { |
2034 vm_exit_during_initialization("G1 requires a G1SATBLoggingCardTableModRefBS"); | |
342 | 2035 return JNI_ENOMEM; |
2036 } | |
2037 | |
2038 // Also create a G1 rem set. | |
12343 | 2039 _g1_rem_set = new G1RemSet(this, g1_barrier_set()); |
342 | 2040 |
2041 // Carve out the G1 part of the heap. | |
2042 | |
2043 ReservedSpace g1_rs = heap_rs.first_part(max_byte_size); | |
2044 _g1_reserved = MemRegion((HeapWord*)g1_rs.base(), | |
2045 g1_rs.size()/HeapWordSize); | |
2046 | |
2047 _g1_storage.initialize(g1_rs, 0); | |
2048 _g1_committed = MemRegion((HeapWord*)_g1_storage.low(), (size_t) 0); | |
3766 | 2049 _hrs.initialize((HeapWord*) _g1_reserved.start(), |
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2050 (HeapWord*) _g1_reserved.end()); |
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2051 assert(_hrs.max_length() == _expansion_regions, |
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2052 err_msg("max length: %u expansion regions: %u", |
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2053 _hrs.max_length(), _expansion_regions)); |
342 | 2054 |
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2055 // Do later initialization work for concurrent refinement. |
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2056 _cg1r->init(); |
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2057 |
807
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2058 // 6843694 - ensure that the maximum region index can fit |
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2059 // in the remembered set structures. |
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2060 const uint max_region_idx = (1U << (sizeof(RegionIdx_t)*BitsPerByte-1)) - 1; |
807
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2061 guarantee((max_regions() - 1) <= max_region_idx, "too many regions"); |
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2062 |
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2063 size_t max_cards_per_region = ((size_t)1 << (sizeof(CardIdx_t)*BitsPerByte-1)) - 1; |
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2064 guarantee(HeapRegion::CardsPerRegion > 0, "make sure it's initialized"); |
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2065 guarantee(HeapRegion::CardsPerRegion < max_cards_per_region, |
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2066 "too many cards per region"); |
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2067 |
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2068 FreeRegionList::set_unrealistically_long_length(max_regions() + 1); |
2152 | 2069 |
342 | 2070 _bot_shared = new G1BlockOffsetSharedArray(_reserved, |
2071 heap_word_size(init_byte_size)); | |
2072 | |
2073 _g1h = this; | |
2074 | |
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2075 _in_cset_fast_test.initialize(_g1_reserved.start(), _g1_reserved.end(), HeapRegion::GrainBytes); |
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2076 |
342 | 2077 // Create the ConcurrentMark data structure and thread. |
2078 // (Must do this late, so that "max_regions" is defined.) | |
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2079 _cm = new ConcurrentMark(this, heap_rs); |
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2080 if (_cm == NULL || !_cm->completed_initialization()) { |
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2081 vm_shutdown_during_initialization("Could not create/initialize ConcurrentMark"); |
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2082 return JNI_ENOMEM; |
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|
2083 } |
342 | 2084 _cmThread = _cm->cmThread(); |
2085 | |
2086 // Initialize the from_card cache structure of HeapRegionRemSet. | |
2087 HeapRegionRemSet::init_heap(max_regions()); | |
2088 | |
677 | 2089 // Now expand into the initial heap size. |
2188
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6923430: G1: assert(res != 0,"This should have worked.")
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2173
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|
2090 if (!expand(init_byte_size)) { |
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
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7207
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|
2091 vm_shutdown_during_initialization("Failed to allocate initial heap."); |
2188
c33825b68624
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|
2092 return JNI_ENOMEM; |
c33825b68624
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|
2093 } |
342 | 2094 |
2095 // Perform any initialization actions delegated to the policy. | |
2096 g1_policy()->init(); | |
2097 | |
2098 _refine_cte_cl = | |
20192 | 2099 new RefineCardTableEntryClosure(g1_rem_set(), |
342 | 2100 concurrent_g1_refine()); |
2101 JavaThread::dirty_card_queue_set().set_closure(_refine_cte_cl); | |
2102 | |
2103 JavaThread::satb_mark_queue_set().initialize(SATB_Q_CBL_mon, | |
2104 SATB_Q_FL_lock, | |
1111 | 2105 G1SATBProcessCompletedThreshold, |
342 | 2106 Shared_SATB_Q_lock); |
794 | 2107 |
2108 JavaThread::dirty_card_queue_set().initialize(DirtyCardQ_CBL_mon, | |
2109 DirtyCardQ_FL_lock, | |
1111 | 2110 concurrent_g1_refine()->yellow_zone(), |
2111 concurrent_g1_refine()->red_zone(), | |
794 | 2112 Shared_DirtyCardQ_lock); |
2113 | |
616
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6720309: G1: don't synchronously update RSet during evacuation pauses
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|
2114 if (G1DeferredRSUpdate) { |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
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diff
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|
2115 dirty_card_queue_set().initialize(DirtyCardQ_CBL_mon, |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
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diff
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|
2116 DirtyCardQ_FL_lock, |
1111 | 2117 -1, // never trigger processing |
2118 -1, // no limit on length | |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
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|
2119 Shared_DirtyCardQ_lock, |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
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diff
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|
2120 &JavaThread::dirty_card_queue_set()); |
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|
2121 } |
1705 | 2122 |
2123 // Initialize the card queue set used to hold cards containing | |
2124 // references into the collection set. | |
2125 _into_cset_dirty_card_queue_set.initialize(DirtyCardQ_CBL_mon, | |
2126 DirtyCardQ_FL_lock, | |
2127 -1, // never trigger processing | |
2128 -1, // no limit on length | |
2129 Shared_DirtyCardQ_lock, | |
2130 &JavaThread::dirty_card_queue_set()); | |
2131 | |
342 | 2132 // In case we're keeping closure specialization stats, initialize those |
2133 // counts and that mechanism. | |
2134 SpecializationStats::clear(); | |
2135 | |
2433
abdfc822206f
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|
2136 // Here we allocate the dummy full region that is required by the |
abdfc822206f
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|
2137 // G1AllocRegion class. If we don't pass an address in the reserved |
abdfc822206f
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|
2138 // space here, lots of asserts fire. |
3766 | 2139 |
2140 HeapRegion* dummy_region = new_heap_region(0 /* index of bottom region */, | |
2141 _g1_reserved.start()); | |
2433
abdfc822206f
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|
2142 // We'll re-use the same region whether the alloc region will |
abdfc822206f
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|
2143 // require BOT updates or not and, if it doesn't, then a non-young |
abdfc822206f
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|
2144 // region will complain that it cannot support allocations without |
abdfc822206f
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|
2145 // BOT updates. So we'll tag the dummy region as young to avoid that. |
abdfc822206f
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|
2146 dummy_region->set_young(); |
abdfc822206f
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|
2147 // Make sure it's full. |
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|
2148 dummy_region->set_top(dummy_region->end()); |
abdfc822206f
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|
2149 G1AllocRegion::setup(this, dummy_region); |
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|
2150 |
abdfc822206f
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|
2151 init_mutator_alloc_region(); |
abdfc822206f
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|
2152 |
3289
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jmasa
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|
2153 // Do create of the monitoring and management support so that |
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
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diff
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|
2154 // values in the heap have been properly initialized. |
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
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|
2155 _g1mm = new G1MonitoringSupport(this); |
3289
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|
2156 |
17764 | 2157 G1StringDedup::initialize(); |
2158 | |
342 | 2159 return JNI_OK; |
2160 } | |
2161 | |
17947
1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
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17937
diff
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|
2162 void G1CollectedHeap::stop() { |
17992 | 2163 // Stop all concurrent threads. We do this to make sure these threads |
2164 // do not continue to execute and access resources (e.g. gclog_or_tty) | |
17947
1772223a25a2
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diff
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|
2165 // that are destroyed during shutdown. |
17992 | 2166 _cg1r->stop(); |
2167 _cmThread->stop(); | |
2168 if (G1StringDedup::is_enabled()) { | |
2169 G1StringDedup::stop(); | |
2170 } | |
17947
1772223a25a2
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17937
diff
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|
2171 } |
1772223a25a2
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17937
diff
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|
2172 |
12233
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
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12179
diff
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|
2173 size_t G1CollectedHeap::conservative_max_heap_alignment() { |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
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diff
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|
2174 return HeapRegion::max_region_size(); |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
tschatzl
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12179
diff
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|
2175 } |
40136aa2cdb1
8010722: assert: failed: heap size is too big for compressed oops
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diff
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|
2176 |
342 | 2177 void G1CollectedHeap::ref_processing_init() { |
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
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diff
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|
2178 // Reference processing in G1 currently works as follows: |
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
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diff
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|
2179 // |
3979
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|
2180 // * There are two reference processor instances. One is |
4dfb2df418f2
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|
2181 // used to record and process discovered references |
4dfb2df418f2
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diff
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|
2182 // during concurrent marking; the other is used to |
4dfb2df418f2
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diff
changeset
|
2183 // record and process references during STW pauses |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
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|
2184 // (both full and incremental). |
4dfb2df418f2
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diff
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|
2185 // * Both ref processors need to 'span' the entire heap as |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
2186 // the regions in the collection set may be dotted around. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
2187 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
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3973
diff
changeset
|
2188 // * For the concurrent marking ref processor: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
2189 // * Reference discovery is enabled at initial marking. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2190 // * Reference discovery is disabled and the discovered |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2191 // references processed etc during remarking. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
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3973
diff
changeset
|
2192 // * Reference discovery is MT (see below). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2193 // * Reference discovery requires a barrier (see below). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
2194 // * Reference processing may or may not be MT |
4dfb2df418f2
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diff
changeset
|
2195 // (depending on the value of ParallelRefProcEnabled |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
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|
2196 // and ParallelGCThreads). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2197 // * A full GC disables reference discovery by the CM |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2198 // ref processor and abandons any entries on it's |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2199 // discovered lists. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2200 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2201 // * For the STW processor: |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
2202 // * Non MT discovery is enabled at the start of a full GC. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
2203 // * Processing and enqueueing during a full GC is non-MT. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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3973
diff
changeset
|
2204 // * During a full GC, references are processed after marking. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
2205 // |
4dfb2df418f2
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|
2206 // * Discovery (may or may not be MT) is enabled at the start |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
2207 // of an incremental evacuation pause. |
4dfb2df418f2
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diff
changeset
|
2208 // * References are processed near the end of a STW evacuation pause. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
2209 // * For both types of GC: |
4dfb2df418f2
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3973
diff
changeset
|
2210 // * Discovery is atomic - i.e. not concurrent. |
4dfb2df418f2
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johnc
parents:
3973
diff
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|
2211 // * Reference discovery will not need a barrier. |
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
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diff
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|
2212 |
342 | 2213 SharedHeap::ref_processing_init(); |
2214 MemRegion mr = reserved_region(); | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
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|
2215 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
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|
2216 // Concurrent Mark ref processor |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
2217 _ref_processor_cm = |
2369
92da084fefc9
6668573: CMS: reference processing crash if ParallelCMSThreads > ParallelGCThreads
ysr
parents:
2361
diff
changeset
|
2218 new ReferenceProcessor(mr, // span |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
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3973
diff
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|
2219 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
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|
2220 // mt processing |
4dfb2df418f2
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3973
diff
changeset
|
2221 (int) ParallelGCThreads, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
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3973
diff
changeset
|
2222 // degree of mt processing |
4dfb2df418f2
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3973
diff
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|
2223 (ParallelGCThreads > 1) || (ConcGCThreads > 1), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
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diff
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|
2224 // mt discovery |
4dfb2df418f2
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changeset
|
2225 (int) MAX2(ParallelGCThreads, ConcGCThreads), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
2226 // degree of mt discovery |
4dfb2df418f2
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diff
changeset
|
2227 false, |
4dfb2df418f2
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diff
changeset
|
2228 // Reference discovery is not atomic |
17976
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8043239: G1: Missing post barrier in processing of j.l.ref.Reference objects
brutisso
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17948
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|
2229 &_is_alive_closure_cm); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
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|
2230 // is alive closure |
4dfb2df418f2
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diff
changeset
|
2231 // (for efficiency/performance) |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
2232 |
4dfb2df418f2
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diff
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|
2233 // STW ref processor |
4dfb2df418f2
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diff
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|
2234 _ref_processor_stw = |
4dfb2df418f2
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diff
changeset
|
2235 new ReferenceProcessor(mr, // span |
4dfb2df418f2
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diff
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|
2236 ParallelRefProcEnabled && (ParallelGCThreads > 1), |
4dfb2df418f2
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diff
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|
2237 // mt processing |
4dfb2df418f2
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|
2238 MAX2((int)ParallelGCThreads, 1), |
4dfb2df418f2
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diff
changeset
|
2239 // degree of mt processing |
4dfb2df418f2
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diff
changeset
|
2240 (ParallelGCThreads > 1), |
4dfb2df418f2
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diff
changeset
|
2241 // mt discovery |
4dfb2df418f2
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|
2242 MAX2((int)ParallelGCThreads, 1), |
4dfb2df418f2
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diff
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|
2243 // degree of mt discovery |
4dfb2df418f2
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diff
changeset
|
2244 true, |
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|
2245 // Reference discovery is atomic |
17976
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|
2246 &_is_alive_closure_stw); |
3979
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|
2247 // is alive closure |
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|
2248 // (for efficiency/performance) |
342 | 2249 } |
2250 | |
2251 size_t G1CollectedHeap::capacity() const { | |
2252 return _g1_committed.byte_size(); | |
2253 } | |
2254 | |
6254
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|
2255 void G1CollectedHeap::reset_gc_time_stamps(HeapRegion* hr) { |
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|
2256 assert(!hr->continuesHumongous(), "pre-condition"); |
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|
2257 hr->reset_gc_time_stamp(); |
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|
2258 if (hr->startsHumongous()) { |
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|
2259 uint first_index = hr->hrs_index() + 1; |
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|
2260 uint last_index = hr->last_hc_index(); |
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|
2261 for (uint i = first_index; i < last_index; i += 1) { |
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2262 HeapRegion* chr = region_at(i); |
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2263 assert(chr->continuesHumongous(), "sanity"); |
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2264 chr->reset_gc_time_stamp(); |
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2265 } |
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|
2266 } |
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|
2267 } |
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|
2268 |
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|
2269 #ifndef PRODUCT |
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|
2270 class CheckGCTimeStampsHRClosure : public HeapRegionClosure { |
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2271 private: |
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|
2272 unsigned _gc_time_stamp; |
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|
2273 bool _failures; |
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|
2274 |
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|
2275 public: |
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|
2276 CheckGCTimeStampsHRClosure(unsigned gc_time_stamp) : |
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2277 _gc_time_stamp(gc_time_stamp), _failures(false) { } |
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2278 |
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|
2279 virtual bool doHeapRegion(HeapRegion* hr) { |
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2280 unsigned region_gc_time_stamp = hr->get_gc_time_stamp(); |
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2281 if (_gc_time_stamp != region_gc_time_stamp) { |
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2282 gclog_or_tty->print_cr("Region "HR_FORMAT" has GC time stamp = %d, " |
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2283 "expected %d", HR_FORMAT_PARAMS(hr), |
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|
2284 region_gc_time_stamp, _gc_time_stamp); |
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|
2285 _failures = true; |
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|
2286 } |
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|
2287 return false; |
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|
2288 } |
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|
2289 |
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|
2290 bool failures() { return _failures; } |
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|
2291 }; |
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|
2292 |
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|
2293 void G1CollectedHeap::check_gc_time_stamps() { |
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2294 CheckGCTimeStampsHRClosure cl(_gc_time_stamp); |
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2295 heap_region_iterate(&cl); |
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2296 guarantee(!cl.failures(), "all GC time stamps should have been reset"); |
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|
2297 } |
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|
2298 #endif // PRODUCT |
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|
2299 |
1705 | 2300 void G1CollectedHeap::iterate_dirty_card_closure(CardTableEntryClosure* cl, |
2301 DirtyCardQueue* into_cset_dcq, | |
2302 bool concurrent, | |
17844
8847586c9037
8016302: Change type of the number of GC workers to unsigned int (2)
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|
2303 uint worker_i) { |
889 | 2304 // Clean cards in the hot card cache |
10246
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7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
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|
2305 G1HotCardCache* hot_card_cache = _cg1r->hot_card_cache(); |
194f52aa2f23
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|
2306 hot_card_cache->drain(worker_i, g1_rem_set(), into_cset_dcq); |
889 | 2307 |
342 | 2308 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); |
2309 int n_completed_buffers = 0; | |
1705 | 2310 while (dcqs.apply_closure_to_completed_buffer(cl, worker_i, 0, true)) { |
342 | 2311 n_completed_buffers++; |
2312 } | |
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
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|
2313 g1_policy()->phase_times()->record_update_rs_processed_buffers(worker_i, n_completed_buffers); |
342 | 2314 dcqs.clear_n_completed_buffers(); |
2315 assert(!dcqs.completed_buffers_exist_dirty(), "Completed buffers exist!"); | |
2316 } | |
2317 | |
2318 | |
2319 // Computes the sum of the storage used by the various regions. | |
2320 | |
2321 size_t G1CollectedHeap::used() const { | |
862
36b5611220a7
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|
2322 assert(Heap_lock->owner() != NULL, |
36b5611220a7
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|
2323 "Should be owned on this thread's behalf."); |
342 | 2324 size_t result = _summary_bytes_used; |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
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|
2325 // Read only once in case it is set to NULL concurrently |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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2432
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|
2326 HeapRegion* hr = _mutator_alloc_region.get(); |
845
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6700789: G1: Enable use of compressed oops with G1 heaps
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|
2327 if (hr != NULL) |
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|
2328 result += hr->used(); |
342 | 2329 return result; |
2330 } | |
2331 | |
846
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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|
2332 size_t G1CollectedHeap::used_unlocked() const { |
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
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|
2333 size_t result = _summary_bytes_used; |
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
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|
2334 return result; |
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
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|
2335 } |
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
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|
2336 |
342 | 2337 class SumUsedClosure: public HeapRegionClosure { |
2338 size_t _used; | |
2339 public: | |
2340 SumUsedClosure() : _used(0) {} | |
2341 bool doHeapRegion(HeapRegion* r) { | |
2342 if (!r->continuesHumongous()) { | |
2343 _used += r->used(); | |
2344 } | |
2345 return false; | |
2346 } | |
2347 size_t result() { return _used; } | |
2348 }; | |
2349 | |
2350 size_t G1CollectedHeap::recalculate_used() const { | |
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
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17756
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|
2351 double recalculate_used_start = os::elapsedTime(); |
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
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17756
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|
2352 |
342 | 2353 SumUsedClosure blk; |
3766 | 2354 heap_region_iterate(&blk); |
17757
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|
2355 |
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
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17756
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|
2356 g1_policy()->phase_times()->record_evac_fail_recalc_used_time((os::elapsedTime() - recalculate_used_start) * 1000.0); |
342 | 2357 return blk.result(); |
2358 } | |
2359 | |
2360 size_t G1CollectedHeap::unsafe_max_alloc() { | |
2152 | 2361 if (free_regions() > 0) return HeapRegion::GrainBytes; |
342 | 2362 // otherwise, is there space in the current allocation region? |
2363 | |
2364 // We need to store the current allocation region in a local variable | |
2365 // here. The problem is that this method doesn't take any locks and | |
2366 // there may be other threads which overwrite the current allocation | |
2367 // region field. attempt_allocation(), for example, sets it to NULL | |
2368 // and this can happen *after* the NULL check here but before the call | |
2369 // to free(), resulting in a SIGSEGV. Note that this doesn't appear | |
2370 // to be a problem in the optimized build, since the two loads of the | |
2371 // current allocation region field are optimized away. | |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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|
2372 HeapRegion* hr = _mutator_alloc_region.get(); |
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7023069: G1: Introduce symmetric locking in the slow allocation path
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diff
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|
2373 if (hr == NULL) { |
342 | 2374 return 0; |
2375 } | |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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2432
diff
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|
2376 return hr->free(); |
342 | 2377 } |
2378 | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
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1611
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|
2379 bool G1CollectedHeap::should_do_concurrent_full_gc(GCCause::Cause cause) { |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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4875
diff
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|
2380 switch (cause) { |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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4875
diff
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|
2381 case GCCause::_gc_locker: return GCLockerInvokesConcurrent; |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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4875
diff
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|
2382 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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|
2383 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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|
2384 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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|
2385 } |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
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1611
diff
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|
2386 } |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
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1611
diff
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|
2387 |
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
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2433
diff
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|
2388 #ifndef PRODUCT |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
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|
2389 void G1CollectedHeap::allocate_dummy_regions() { |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2390 // 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
|
2391 size_t word_size = HeapRegion::GrainWords - 1024; |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
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|
2392 // 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
|
2393 guarantee(isHumongous(word_size), "sanity"); |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2394 |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2395 for (uintx i = 0; i < G1DummyRegionsPerGC; ++i) { |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2396 // 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
|
2397 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
|
2398 if (dummy_obj != NULL) { |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2399 MemRegion mr(dummy_obj, word_size); |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2400 CollectedHeap::fill_with_object(mr); |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2401 } else { |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2402 // If we can't allocate once, we probably cannot allocate |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2403 // again. Let's get out of the loop. |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2404 break; |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2405 } |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2406 } |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2407 } |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
2408 #endif // !PRODUCT |
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
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2433
diff
changeset
|
2409 |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2410 void G1CollectedHeap::increment_old_marking_cycles_started() { |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2411 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
|
2412 _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
|
2413 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
|
2414 _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
|
2415 |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2416 _old_marking_cycles_started++; |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2417 } |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2418 |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2419 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
|
2420 MonitorLockerEx x(FullGCCount_lock, Mutex::_no_safepoint_check_flag); |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
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1611
diff
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|
2421 |
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2422 // 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
|
2423 // 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
|
2424 // 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
|
2425 // assert here. |
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
parents:
1995
diff
changeset
|
2426 |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
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|
2427 // Given that this method is called at the end of a Full GC or of a |
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6944166: G1: explicit GCs are not always handled correctly
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|
2428 // concurrent cycle, and those can be nested (i.e., a Full GC can |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
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|
2429 // interrupt a concurrent cycle), the number of full collections |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
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|
2430 // completed should be either one (in the case where there was no |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
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|
2431 // nesting) or two (when a Full GC interrupted a concurrent cycle) |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
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|
2432 // behind the number of full collections started. |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
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|
2433 |
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6944166: G1: explicit GCs are not always handled correctly
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|
2434 // 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
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1995
diff
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|
2435 assert(concurrent || |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
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|
2436 (_old_marking_cycles_started == _old_marking_cycles_completed + 1) || |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
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|
2437 (_old_marking_cycles_started == _old_marking_cycles_completed + 2), |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
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|
2438 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
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|
2439 "is inconsistent with _old_marking_cycles_completed = %u", |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
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|
2440 _old_marking_cycles_started, _old_marking_cycles_completed)); |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
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|
2441 |
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6944166: G1: explicit GCs are not always handled correctly
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diff
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|
2442 // 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
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1995
diff
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|
2443 assert(!concurrent || |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
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6109
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|
2444 (_old_marking_cycles_started == _old_marking_cycles_completed + 1), |
2030
fb712ff22571
7000559: G1: assertion failure !outer || (full_collections_started == _full_collections_completed + 1)
tonyp
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1995
diff
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|
2445 err_msg("for outer caller (concurrent cycle): " |
6120
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7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
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|
2446 "_old_marking_cycles_started = %u " |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
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6109
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|
2447 "is inconsistent with _old_marking_cycles_completed = %u", |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
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6109
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|
2448 _old_marking_cycles_started, _old_marking_cycles_completed)); |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
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6109
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|
2449 |
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
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6109
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|
2450 _old_marking_cycles_completed += 1; |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
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|
2451 |
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2452 // 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
|
2453 // we wake up any waiters (especially when ExplicitInvokesConcurrent |
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2454 // is set) so that if a waiter requests another System.gc() it doesn't |
10405 | 2455 // 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
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1995
diff
changeset
|
2456 if (concurrent) { |
1840
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2457 _cmThread->clear_in_progress(); |
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2458 } |
4e0094bc41fa
6983311: G1: LoopTest hangs when run with -XX:+ExplicitInvokesConcurrent
johnc
parents:
1833
diff
changeset
|
2459 |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
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1611
diff
changeset
|
2460 // This notify_all() will ensure that a thread that called |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
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1611
diff
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|
2461 // System.gc() with (with ExplicitGCInvokesConcurrent set or not) |
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1611
diff
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|
2462 // 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
|
2463 // waiting in VM_G1IncCollectionPause::doit_epilogue(). |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2464 FullGCCount_lock->notify_all(); |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
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parents:
1611
diff
changeset
|
2465 } |
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1611
diff
changeset
|
2466 |
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
2467 void G1CollectedHeap::register_concurrent_cycle_start(const Ticks& start_time) { |
10405 | 2468 _concurrent_cycle_started = true; |
2469 _gc_timer_cm->register_gc_start(start_time); | |
2470 | |
2471 _gc_tracer_cm->report_gc_start(gc_cause(), _gc_timer_cm->gc_start()); | |
2472 trace_heap_before_gc(_gc_tracer_cm); | |
2473 } | |
2474 | |
2475 void G1CollectedHeap::register_concurrent_cycle_end() { | |
2476 if (_concurrent_cycle_started) { | |
2477 if (_cm->has_aborted()) { | |
2478 _gc_tracer_cm->report_concurrent_mode_failure(); | |
2479 } | |
12179
f175e3678be2
8020692: TestGCEventMixed.java failed because of timestamp in event after end event
ehelin
parents:
12116
diff
changeset
|
2480 |
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
2481 _gc_timer_cm->register_gc_end(); |
10405 | 2482 _gc_tracer_cm->report_gc_end(_gc_timer_cm->gc_end(), _gc_timer_cm->time_partitions()); |
2483 | |
2484 _concurrent_cycle_started = false; | |
2485 } | |
2486 } | |
2487 | |
2488 void G1CollectedHeap::trace_heap_after_concurrent_cycle() { | |
2489 if (_concurrent_cycle_started) { | |
2490 trace_heap_after_gc(_gc_tracer_cm); | |
2491 } | |
2492 } | |
2493 | |
2494 G1YCType G1CollectedHeap::yc_type() { | |
2495 bool is_young = g1_policy()->gcs_are_young(); | |
2496 bool is_initial_mark = g1_policy()->during_initial_mark_pause(); | |
2497 bool is_during_mark = mark_in_progress(); | |
2498 | |
2499 if (is_initial_mark) { | |
2500 return InitialMark; | |
2501 } else if (is_during_mark) { | |
2502 return DuringMark; | |
2503 } else if (is_young) { | |
2504 return Normal; | |
2505 } else { | |
2506 return Mixed; | |
2507 } | |
2508 } | |
2509 | |
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2510 void G1CollectedHeap::collect(GCCause::Cause cause) { |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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4875
diff
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|
2511 assert_heap_not_locked(); |
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2512 |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2513 unsigned int gc_count_before; |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
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6109
diff
changeset
|
2514 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
|
2515 bool retry_gc; |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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parents:
4875
diff
changeset
|
2516 |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
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diff
changeset
|
2517 do { |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2518 retry_gc = false; |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2519 |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2520 { |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2521 MutexLocker ml(Heap_lock); |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2522 |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
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parents:
4875
diff
changeset
|
2523 // 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
|
2524 gc_count_before = total_collections(); |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2525 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
|
2526 } |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2527 |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2528 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
|
2529 // 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
|
2530 // 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
|
2531 // we are not requesting a post-GC allocation. |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2532 VM_G1IncCollectionPause op(gc_count_before, |
1973 | 2533 0, /* word_size */ |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2534 true, /* should_initiate_conc_mark */ |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2535 g1_policy()->max_pause_time_ms(), |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2536 cause); |
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2537 |
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2538 VMThread::execute(&op); |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2539 if (!op.pause_succeeded()) { |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2540 if (old_marking_count_before == _old_marking_cycles_started) { |
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2541 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
|
2542 } else { |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2543 // 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
|
2544 // 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
|
2545 // 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
|
2546 } |
5963
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2547 |
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2548 if (retry_gc) { |
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2549 if (GC_locker::is_active_and_needs_gc()) { |
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2550 GC_locker::stall_until_clear(); |
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2551 } |
64bf7c8270cb
7147724: G1: hang in SurrogateLockerThread::manipulatePLL
johnc
parents:
4912
diff
changeset
|
2552 } |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2553 } |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2554 } else { |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2555 if (cause == GCCause::_gc_locker |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2556 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
|
2557 |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2558 // 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
|
2559 // 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
|
2560 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
|
2561 0, /* word_size */ |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2562 false, /* should_initiate_conc_mark */ |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2563 g1_policy()->max_pause_time_ms(), |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2564 cause); |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2565 VMThread::execute(&op); |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2566 } else { |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2567 // Schedule a Full GC. |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
2568 VM_G1CollectFull op(gc_count_before, old_marking_count_before, cause); |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2569 VMThread::execute(&op); |
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
2570 } |
1088
3fc996d4edd2
6902303: G1: ScavengeALot should cause an incremental, rather than a full, collection
ysr
parents:
1045
diff
changeset
|
2571 } |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
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4875
diff
changeset
|
2572 } while (retry_gc); |
342 | 2573 } |
2574 | |
2575 bool G1CollectedHeap::is_in(const void* p) const { | |
4708 | 2576 if (_g1_committed.contains(p)) { |
2577 // Given that we know that p is in the committed space, | |
2578 // heap_region_containing_raw() should successfully | |
2579 // return the containing region. | |
2580 HeapRegion* hr = heap_region_containing_raw(p); | |
342 | 2581 return hr->is_in(p); |
2582 } else { | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
2583 return false; |
342 | 2584 } |
2585 } | |
2586 | |
2587 // Iteration functions. | |
2588 | |
2589 // Iterates an OopClosure over all ref-containing fields of objects | |
2590 // within a HeapRegion. | |
2591 | |
2592 class IterateOopClosureRegionClosure: public HeapRegionClosure { | |
2593 MemRegion _mr; | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
2594 ExtendedOopClosure* _cl; |
342 | 2595 public: |
6725
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2596 IterateOopClosureRegionClosure(MemRegion mr, ExtendedOopClosure* cl) |
342 | 2597 : _mr(mr), _cl(cl) {} |
2598 bool doHeapRegion(HeapRegion* r) { | |
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2599 if (!r->continuesHumongous()) { |
342 | 2600 r->oop_iterate(_cl); |
2601 } | |
2602 return false; | |
2603 } | |
2604 }; | |
2605 | |
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2606 void G1CollectedHeap::oop_iterate(ExtendedOopClosure* cl) { |
342 | 2607 IterateOopClosureRegionClosure blk(_g1_committed, cl); |
3766 | 2608 heap_region_iterate(&blk); |
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2609 } |
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2610 |
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2611 void G1CollectedHeap::oop_iterate(MemRegion mr, ExtendedOopClosure* cl) { |
342 | 2612 IterateOopClosureRegionClosure blk(mr, cl); |
3766 | 2613 heap_region_iterate(&blk); |
342 | 2614 } |
2615 | |
2616 // Iterates an ObjectClosure over all objects within a HeapRegion. | |
2617 | |
2618 class IterateObjectClosureRegionClosure: public HeapRegionClosure { | |
2619 ObjectClosure* _cl; | |
2620 public: | |
2621 IterateObjectClosureRegionClosure(ObjectClosure* cl) : _cl(cl) {} | |
2622 bool doHeapRegion(HeapRegion* r) { | |
2623 if (! r->continuesHumongous()) { | |
2624 r->object_iterate(_cl); | |
2625 } | |
2626 return false; | |
2627 } | |
2628 }; | |
2629 | |
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2630 void G1CollectedHeap::object_iterate(ObjectClosure* cl) { |
342 | 2631 IterateObjectClosureRegionClosure blk(cl); |
3766 | 2632 heap_region_iterate(&blk); |
342 | 2633 } |
2634 | |
2635 // Calls a SpaceClosure on a HeapRegion. | |
2636 | |
2637 class SpaceClosureRegionClosure: public HeapRegionClosure { | |
2638 SpaceClosure* _cl; | |
2639 public: | |
2640 SpaceClosureRegionClosure(SpaceClosure* cl) : _cl(cl) {} | |
2641 bool doHeapRegion(HeapRegion* r) { | |
2642 _cl->do_space(r); | |
2643 return false; | |
2644 } | |
2645 }; | |
2646 | |
2647 void G1CollectedHeap::space_iterate(SpaceClosure* cl) { | |
2648 SpaceClosureRegionClosure blk(cl); | |
3766 | 2649 heap_region_iterate(&blk); |
342 | 2650 } |
2651 | |
3766 | 2652 void G1CollectedHeap::heap_region_iterate(HeapRegionClosure* cl) const { |
2653 _hrs.iterate(cl); | |
342 | 2654 } |
2655 | |
2656 void | |
2657 G1CollectedHeap::heap_region_par_iterate_chunked(HeapRegionClosure* cl, | |
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2658 uint worker_id, |
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2659 uint no_of_par_workers, |
342 | 2660 jint claim_value) { |
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2661 const uint regions = n_regions(); |
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2662 const uint max_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
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2663 no_of_par_workers : |
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2664 1); |
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2665 assert(UseDynamicNumberOfGCThreads || |
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2666 no_of_par_workers == workers()->total_workers(), |
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2667 "Non dynamic should use fixed number of workers"); |
355 | 2668 // try to spread out the starting points of the workers |
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2669 const HeapRegion* start_hr = |
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2670 start_region_for_worker(worker_id, no_of_par_workers); |
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2671 const uint start_index = start_hr->hrs_index(); |
355 | 2672 |
2673 // each worker will actually look at all regions | |
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2674 for (uint count = 0; count < regions; ++count) { |
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2675 const uint index = (start_index + count) % regions; |
355 | 2676 assert(0 <= index && index < regions, "sanity"); |
2677 HeapRegion* r = region_at(index); | |
2678 // we'll ignore "continues humongous" regions (we'll process them | |
2679 // when we come across their corresponding "start humongous" | |
2680 // region) and regions already claimed | |
2681 if (r->claim_value() == claim_value || r->continuesHumongous()) { | |
2682 continue; | |
2683 } | |
2684 // OK, try to claim it | |
342 | 2685 if (r->claimHeapRegion(claim_value)) { |
355 | 2686 // success! |
2687 assert(!r->continuesHumongous(), "sanity"); | |
2688 if (r->startsHumongous()) { | |
2689 // If the region is "starts humongous" we'll iterate over its | |
2690 // "continues humongous" first; in fact we'll do them | |
2691 // first. The order is important. In on case, calling the | |
2692 // closure on the "starts humongous" region might de-allocate | |
2693 // and clear all its "continues humongous" regions and, as a | |
2694 // result, we might end up processing them twice. So, we'll do | |
2695 // them first (notice: most closures will ignore them anyway) and | |
2696 // then we'll do the "starts humongous" region. | |
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2697 for (uint ch_index = index + 1; ch_index < regions; ++ch_index) { |
355 | 2698 HeapRegion* chr = region_at(ch_index); |
2699 | |
2700 // if the region has already been claimed or it's not | |
2701 // "continues humongous" we're done | |
2702 if (chr->claim_value() == claim_value || | |
2703 !chr->continuesHumongous()) { | |
2704 break; | |
2705 } | |
2706 | |
10405 | 2707 // No one should have claimed it directly. We can given |
355 | 2708 // that we claimed its "starts humongous" region. |
2709 assert(chr->claim_value() != claim_value, "sanity"); | |
2710 assert(chr->humongous_start_region() == r, "sanity"); | |
2711 | |
2712 if (chr->claimHeapRegion(claim_value)) { | |
10405 | 2713 // we should always be able to claim it; no one else should |
355 | 2714 // be trying to claim this region |
2715 | |
2716 bool res2 = cl->doHeapRegion(chr); | |
2717 assert(!res2, "Should not abort"); | |
2718 | |
2719 // Right now, this holds (i.e., no closure that actually | |
2720 // does something with "continues humongous" regions | |
2721 // clears them). We might have to weaken it in the future, | |
2722 // but let's leave these two asserts here for extra safety. | |
2723 assert(chr->continuesHumongous(), "should still be the case"); | |
2724 assert(chr->humongous_start_region() == r, "sanity"); | |
2725 } else { | |
2726 guarantee(false, "we should not reach here"); | |
2727 } | |
2728 } | |
2729 } | |
2730 | |
2731 assert(!r->continuesHumongous(), "sanity"); | |
2732 bool res = cl->doHeapRegion(r); | |
2733 assert(!res, "Should not abort"); | |
2734 } | |
2735 } | |
2736 } | |
2737 | |
390 | 2738 class ResetClaimValuesClosure: public HeapRegionClosure { |
2739 public: | |
2740 bool doHeapRegion(HeapRegion* r) { | |
2741 r->set_claim_value(HeapRegion::InitialClaimValue); | |
2742 return false; | |
2743 } | |
2744 }; | |
2745 | |
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2746 void G1CollectedHeap::reset_heap_region_claim_values() { |
390 | 2747 ResetClaimValuesClosure blk; |
2748 heap_region_iterate(&blk); | |
2749 } | |
2750 | |
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2751 void G1CollectedHeap::reset_cset_heap_region_claim_values() { |
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2752 ResetClaimValuesClosure blk; |
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2753 collection_set_iterate(&blk); |
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2754 } |
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2755 |
355 | 2756 #ifdef ASSERT |
2757 // This checks whether all regions in the heap have the correct claim | |
2758 // value. I also piggy-backed on this a check to ensure that the | |
2759 // humongous_start_region() information on "continues humongous" | |
2760 // regions is correct. | |
2761 | |
2762 class CheckClaimValuesClosure : public HeapRegionClosure { | |
2763 private: | |
2764 jint _claim_value; | |
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2765 uint _failures; |
355 | 2766 HeapRegion* _sh_region; |
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2767 |
355 | 2768 public: |
2769 CheckClaimValuesClosure(jint claim_value) : | |
2770 _claim_value(claim_value), _failures(0), _sh_region(NULL) { } | |
2771 bool doHeapRegion(HeapRegion* r) { | |
2772 if (r->claim_value() != _claim_value) { | |
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2773 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
355 | 2774 "claim value = %d, should be %d", |
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2775 HR_FORMAT_PARAMS(r), |
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2776 r->claim_value(), _claim_value); |
355 | 2777 ++_failures; |
2778 } | |
2779 if (!r->isHumongous()) { | |
2780 _sh_region = NULL; | |
2781 } else if (r->startsHumongous()) { | |
2782 _sh_region = r; | |
2783 } else if (r->continuesHumongous()) { | |
2784 if (r->humongous_start_region() != _sh_region) { | |
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2785 gclog_or_tty->print_cr("Region " HR_FORMAT ", " |
355 | 2786 "HS = "PTR_FORMAT", should be "PTR_FORMAT, |
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2787 HR_FORMAT_PARAMS(r), |
355 | 2788 r->humongous_start_region(), |
2789 _sh_region); | |
2790 ++_failures; | |
342 | 2791 } |
2792 } | |
355 | 2793 return false; |
2794 } | |
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2795 uint failures() { return _failures; } |
355 | 2796 }; |
2797 | |
2798 bool G1CollectedHeap::check_heap_region_claim_values(jint claim_value) { | |
2799 CheckClaimValuesClosure cl(claim_value); | |
2800 heap_region_iterate(&cl); | |
2801 return cl.failures() == 0; | |
2802 } | |
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2803 |
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2804 class CheckClaimValuesInCSetHRClosure: public HeapRegionClosure { |
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2805 private: |
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|
2806 jint _claim_value; |
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2807 uint _failures; |
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2808 |
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2809 public: |
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2810 CheckClaimValuesInCSetHRClosure(jint claim_value) : |
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2811 _claim_value(claim_value), _failures(0) { } |
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2812 |
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2813 uint failures() { return _failures; } |
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2814 |
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2815 bool doHeapRegion(HeapRegion* hr) { |
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2816 assert(hr->in_collection_set(), "how?"); |
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2817 assert(!hr->isHumongous(), "H-region in CSet"); |
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2818 if (hr->claim_value() != _claim_value) { |
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2819 gclog_or_tty->print_cr("CSet Region " HR_FORMAT ", " |
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2820 "claim value = %d, should be %d", |
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2821 HR_FORMAT_PARAMS(hr), |
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2822 hr->claim_value(), _claim_value); |
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2823 _failures += 1; |
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2824 } |
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2825 return false; |
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|
2826 } |
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2827 }; |
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2828 |
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2829 bool G1CollectedHeap::check_cset_heap_region_claim_values(jint claim_value) { |
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2830 CheckClaimValuesInCSetHRClosure cl(claim_value); |
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2831 collection_set_iterate(&cl); |
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2832 return cl.failures() == 0; |
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2833 } |
355 | 2834 #endif // ASSERT |
342 | 2835 |
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2836 // Clear the cached CSet starting regions and (more importantly) |
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2837 // the time stamps. Called when we reset the GC time stamp. |
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2838 void G1CollectedHeap::clear_cset_start_regions() { |
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2839 assert(_worker_cset_start_region != NULL, "sanity"); |
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2840 assert(_worker_cset_start_region_time_stamp != NULL, "sanity"); |
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2841 |
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2842 int n_queues = MAX2((int)ParallelGCThreads, 1); |
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2843 for (int i = 0; i < n_queues; i++) { |
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2844 _worker_cset_start_region[i] = NULL; |
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2845 _worker_cset_start_region_time_stamp[i] = 0; |
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2846 } |
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2847 } |
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2848 |
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2849 // Given the id of a worker, obtain or calculate a suitable |
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2850 // 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
|
2851 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
|
2852 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
|
2853 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2854 HeapRegion* result = NULL; |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2855 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
|
2856 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2857 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
|
2858 // 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
|
2859 // 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
|
2860 // 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
|
2861 // (when the collection set is empty). |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2862 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
|
2863 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
|
2864 return result; |
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 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2867 // 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
|
2868 // 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
|
2869 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2870 // 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
|
2871 // 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
|
2872 // avoid contention. |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2873 // If we have: |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2874 // n collection set regions |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2875 // p threads |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2876 // 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
|
2877 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2878 result = g1_policy()->collection_set(); |
4097
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2879 if (G1CollectedHeap::use_parallel_gc_threads()) { |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2880 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
|
2881 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
|
2882 assert(UseDynamicNumberOfGCThreads || |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2883 active_workers == workers()->total_workers(), |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2884 "Unless dynamic should use total workers"); |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2885 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2886 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
|
2887 uint start_ind = 0; |
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2888 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2889 if (worker_i > 0 && |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2890 _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
|
2891 // Previous workers starting region is valid |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2892 // so let's iterate from there |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2893 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
|
2894 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
|
2895 } |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2896 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2897 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
|
2898 result = result->next_in_collection_set(); |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2899 } |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2900 } |
4709
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2901 |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2902 // 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
|
2903 // (when the collection set is empty). |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2904 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
|
2905 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
|
2906 "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
|
2907 _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
|
2908 OrderAccess::storestore(); |
fd2b426c30db
7119908: G1: Cache CSet start region for each worker for subsequent reuse
johnc
parents:
4708
diff
changeset
|
2909 _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
|
2910 return result; |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2911 } |
dc467e8b2c5e
7112743: G1: Reduce overhead of marking closure during evacuation pauses
johnc
parents:
4095
diff
changeset
|
2912 |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2913 HeapRegion* G1CollectedHeap::start_region_for_worker(uint worker_i, |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2914 uint no_of_par_workers) { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2915 uint worker_num = |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2916 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
|
2917 assert(UseDynamicNumberOfGCThreads || |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2918 no_of_par_workers == workers()->total_workers(), |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2919 "Non dynamic should use fixed number of workers"); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2920 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
|
2921 return region_at(start_index); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2922 } |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
2923 |
342 | 2924 void G1CollectedHeap::collection_set_iterate(HeapRegionClosure* cl) { |
2925 HeapRegion* r = g1_policy()->collection_set(); | |
2926 while (r != NULL) { | |
2927 HeapRegion* next = r->next_in_collection_set(); | |
2928 if (cl->doHeapRegion(r)) { | |
2929 cl->incomplete(); | |
2930 return; | |
2931 } | |
2932 r = next; | |
2933 } | |
2934 } | |
2935 | |
2936 void G1CollectedHeap::collection_set_iterate_from(HeapRegion* r, | |
2937 HeapRegionClosure *cl) { | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2938 if (r == NULL) { |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2939 // 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
|
2940 return; |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2941 } |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
2942 |
342 | 2943 assert(r->in_collection_set(), |
2944 "Start region must be a member of the collection set."); | |
2945 HeapRegion* cur = r; | |
2946 while (cur != NULL) { | |
2947 HeapRegion* next = cur->next_in_collection_set(); | |
2948 if (cl->doHeapRegion(cur) && false) { | |
2949 cl->incomplete(); | |
2950 return; | |
2951 } | |
2952 cur = next; | |
2953 } | |
2954 cur = g1_policy()->collection_set(); | |
2955 while (cur != r) { | |
2956 HeapRegion* next = cur->next_in_collection_set(); | |
2957 if (cl->doHeapRegion(cur) && false) { | |
2958 cl->incomplete(); | |
2959 return; | |
2960 } | |
2961 cur = next; | |
2962 } | |
2963 } | |
2964 | |
2965 CompactibleSpace* G1CollectedHeap::first_compactible_space() { | |
3766 | 2966 return n_regions() > 0 ? region_at(0) : NULL; |
342 | 2967 } |
2968 | |
2969 | |
2970 Space* G1CollectedHeap::space_containing(const void* addr) const { | |
2971 Space* res = heap_region_containing(addr); | |
2972 return res; | |
2973 } | |
2974 | |
2975 HeapWord* G1CollectedHeap::block_start(const void* addr) const { | |
2976 Space* sp = space_containing(addr); | |
2977 if (sp != NULL) { | |
2978 return sp->block_start(addr); | |
2979 } | |
2980 return NULL; | |
2981 } | |
2982 | |
2983 size_t G1CollectedHeap::block_size(const HeapWord* addr) const { | |
2984 Space* sp = space_containing(addr); | |
2985 assert(sp != NULL, "block_size of address outside of heap"); | |
2986 return sp->block_size(addr); | |
2987 } | |
2988 | |
2989 bool G1CollectedHeap::block_is_obj(const HeapWord* addr) const { | |
2990 Space* sp = space_containing(addr); | |
2991 return sp->block_is_obj(addr); | |
2992 } | |
2993 | |
2994 bool G1CollectedHeap::supports_tlab_allocation() const { | |
2995 return true; | |
2996 } | |
2997 | |
2998 size_t G1CollectedHeap::tlab_capacity(Thread* ignored) const { | |
17727 | 2999 return (_g1_policy->young_list_target_length() - young_list()->survivor_length()) * HeapRegion::GrainBytes; |
3000 } | |
3001 | |
3002 size_t G1CollectedHeap::tlab_used(Thread* ignored) const { | |
3003 return young_list()->eden_used_bytes(); | |
3004 } | |
3005 | |
3006 // For G1 TLABs should not contain humongous objects, so the maximum TLAB size | |
3007 // must be smaller than the humongous object limit. | |
3008 size_t G1CollectedHeap::max_tlab_size() const { | |
3009 return align_size_down(_humongous_object_threshold_in_words - 1, MinObjAlignment); | |
342 | 3010 } |
3011 | |
3012 size_t G1CollectedHeap::unsafe_max_tlab_alloc(Thread* ignored) const { | |
3013 // Return the remaining space in the cur alloc region, but not less than | |
3014 // the min TLAB size. | |
1313
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
3015 |
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
3016 // Also, this value can be at most the humongous object threshold, |
10405 | 3017 // 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
|
3018 // humongous objects. |
664ae0c5e0e5
6755988: G1: assert(new_obj != 0 || ... "should be forwarded")
johnc
parents:
1282
diff
changeset
|
3019 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3020 HeapRegion* hr = _mutator_alloc_region.get(); |
17727 | 3021 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
|
3022 if (hr == NULL) { |
17727 | 3023 return max_tlab; |
342 | 3024 } else { |
17727 | 3025 return MIN2(MAX2(hr->free(), (size_t) MinTLABSize), max_tlab); |
342 | 3026 } |
3027 } | |
3028 | |
3029 size_t G1CollectedHeap::max_capacity() const { | |
2188
c33825b68624
6923430: G1: assert(res != 0,"This should have worked.")
johnc
parents:
2173
diff
changeset
|
3030 return _g1_reserved.byte_size(); |
342 | 3031 } |
3032 | |
3033 jlong G1CollectedHeap::millis_since_last_gc() { | |
3034 // assert(false, "NYI"); | |
3035 return 0; | |
3036 } | |
3037 | |
3038 void G1CollectedHeap::prepare_for_verify() { | |
3039 if (SafepointSynchronize::is_at_safepoint() || ! UseTLAB) { | |
3040 ensure_parsability(false); | |
3041 } | |
3042 g1_rem_set()->prepare_for_verify(); | |
3043 } | |
3044 | |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3045 bool G1CollectedHeap::allocated_since_marking(oop obj, HeapRegion* hr, |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3046 VerifyOption vo) { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3047 switch (vo) { |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3048 case VerifyOption_G1UsePrevMarking: |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3049 return hr->obj_allocated_since_prev_marking(obj); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3050 case VerifyOption_G1UseNextMarking: |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3051 return hr->obj_allocated_since_next_marking(obj); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3052 case VerifyOption_G1UseMarkWord: |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3053 return false; |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3054 default: |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3055 ShouldNotReachHere(); |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3056 } |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
3057 return false; // keep some compilers happy |
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7114678: G1: various small fixes, code cleanup, and refactoring
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3058 } |
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3059 |
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3060 HeapWord* G1CollectedHeap::top_at_mark_start(HeapRegion* hr, VerifyOption vo) { |
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3061 switch (vo) { |
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3062 case VerifyOption_G1UsePrevMarking: return hr->prev_top_at_mark_start(); |
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3063 case VerifyOption_G1UseNextMarking: return hr->next_top_at_mark_start(); |
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3064 case VerifyOption_G1UseMarkWord: return NULL; |
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3065 default: ShouldNotReachHere(); |
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3066 } |
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3067 return NULL; // keep some compilers happy |
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3068 } |
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3069 |
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3070 bool G1CollectedHeap::is_marked(oop obj, VerifyOption vo) { |
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3071 switch (vo) { |
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3072 case VerifyOption_G1UsePrevMarking: return isMarkedPrev(obj); |
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3073 case VerifyOption_G1UseNextMarking: return isMarkedNext(obj); |
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3074 case VerifyOption_G1UseMarkWord: return obj->is_gc_marked(); |
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3075 default: ShouldNotReachHere(); |
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3076 } |
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3077 return false; // keep some compilers happy |
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3078 } |
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3079 |
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3080 const char* G1CollectedHeap::top_at_mark_start_str(VerifyOption vo) { |
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3081 switch (vo) { |
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3082 case VerifyOption_G1UsePrevMarking: return "PTAMS"; |
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3083 case VerifyOption_G1UseNextMarking: return "NTAMS"; |
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3084 case VerifyOption_G1UseMarkWord: return "NONE"; |
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3085 default: ShouldNotReachHere(); |
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3086 } |
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3087 return NULL; // keep some compilers happy |
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3088 } |
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3089 |
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3090 class VerifyRootsClosure: public OopClosure { |
12080 | 3091 private: |
3092 G1CollectedHeap* _g1h; | |
3093 VerifyOption _vo; | |
3094 bool _failures; | |
3095 public: | |
3096 // _vo == UsePrevMarking -> use "prev" marking information, | |
3097 // _vo == UseNextMarking -> use "next" marking information, | |
3098 // _vo == UseMarkWord -> use mark word from object header. | |
3099 VerifyRootsClosure(VerifyOption vo) : | |
3100 _g1h(G1CollectedHeap::heap()), | |
3101 _vo(vo), | |
3102 _failures(false) { } | |
3103 | |
3104 bool failures() { return _failures; } | |
3105 | |
3106 template <class T> void do_oop_nv(T* p) { | |
3107 T heap_oop = oopDesc::load_heap_oop(p); | |
3108 if (!oopDesc::is_null(heap_oop)) { | |
3109 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
3110 if (_g1h->is_obj_dead_cond(obj, _vo)) { | |
3111 gclog_or_tty->print_cr("Root location "PTR_FORMAT" " | |
3112 "points to dead obj "PTR_FORMAT, p, (void*) obj); | |
3113 if (_vo == VerifyOption_G1UseMarkWord) { | |
3114 gclog_or_tty->print_cr(" Mark word: "PTR_FORMAT, (void*)(obj->mark())); | |
3115 } | |
3116 obj->print_on(gclog_or_tty); | |
3117 _failures = true; | |
3118 } | |
3119 } | |
3120 } | |
3121 | |
3122 void do_oop(oop* p) { do_oop_nv(p); } | |
3123 void do_oop(narrowOop* p) { do_oop_nv(p); } | |
3124 }; | |
3125 | |
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3126 class G1VerifyCodeRootOopClosure: public OopClosure { |
12080 | 3127 G1CollectedHeap* _g1h; |
3128 OopClosure* _root_cl; | |
3129 nmethod* _nm; | |
3130 VerifyOption _vo; | |
3131 bool _failures; | |
3132 | |
3133 template <class T> void do_oop_work(T* p) { | |
3134 // First verify that this root is live | |
3135 _root_cl->do_oop(p); | |
3136 | |
3137 if (!G1VerifyHeapRegionCodeRoots) { | |
3138 // We're not verifying the code roots attached to heap region. | |
3139 return; | |
3140 } | |
3141 | |
3142 // Don't check the code roots during marking verification in a full GC | |
3143 if (_vo == VerifyOption_G1UseMarkWord) { | |
3144 return; | |
3145 } | |
3146 | |
3147 // Now verify that the current nmethod (which contains p) is | |
3148 // in the code root list of the heap region containing the | |
3149 // object referenced by p. | |
3150 | |
3151 T heap_oop = oopDesc::load_heap_oop(p); | |
3152 if (!oopDesc::is_null(heap_oop)) { | |
3153 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
3154 | |
3155 // Now fetch the region containing the object | |
3156 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
3157 HeapRegionRemSet* hrrs = hr->rem_set(); | |
3158 // Verify that the strong code root list for this region | |
3159 // contains the nmethod | |
3160 if (!hrrs->strong_code_roots_list_contains(_nm)) { | |
3161 gclog_or_tty->print_cr("Code root location "PTR_FORMAT" " | |
3162 "from nmethod "PTR_FORMAT" not in strong " | |
3163 "code roots for region ["PTR_FORMAT","PTR_FORMAT")", | |
3164 p, _nm, hr->bottom(), hr->end()); | |
3165 _failures = true; | |
3166 } | |
3167 } | |
3168 } | |
3169 | |
3170 public: | |
3171 G1VerifyCodeRootOopClosure(G1CollectedHeap* g1h, OopClosure* root_cl, VerifyOption vo): | |
3172 _g1h(g1h), _root_cl(root_cl), _vo(vo), _nm(NULL), _failures(false) {} | |
3173 | |
3174 void do_oop(oop* p) { do_oop_work(p); } | |
3175 void do_oop(narrowOop* p) { do_oop_work(p); } | |
3176 | |
3177 void set_nmethod(nmethod* nm) { _nm = nm; } | |
3178 bool failures() { return _failures; } | |
3179 }; | |
3180 | |
3181 class G1VerifyCodeRootBlobClosure: public CodeBlobClosure { | |
3182 G1VerifyCodeRootOopClosure* _oop_cl; | |
3183 | |
3184 public: | |
3185 G1VerifyCodeRootBlobClosure(G1VerifyCodeRootOopClosure* oop_cl): | |
3186 _oop_cl(oop_cl) {} | |
3187 | |
3188 void do_code_blob(CodeBlob* cb) { | |
3189 nmethod* nm = cb->as_nmethod_or_null(); | |
3190 if (nm != NULL) { | |
3191 _oop_cl->set_nmethod(nm); | |
3192 nm->oops_do(_oop_cl); | |
3193 } | |
3194 } | |
3195 }; | |
3196 | |
3197 class YoungRefCounterClosure : public OopClosure { | |
3198 G1CollectedHeap* _g1h; | |
3199 int _count; | |
3200 public: | |
3201 YoungRefCounterClosure(G1CollectedHeap* g1h) : _g1h(g1h), _count(0) {} | |
3202 void do_oop(oop* p) { if (_g1h->is_in_young(*p)) { _count++; } } | |
3203 void do_oop(narrowOop* p) { ShouldNotReachHere(); } | |
3204 | |
3205 int count() { return _count; } | |
3206 void reset_count() { _count = 0; }; | |
3207 }; | |
3208 | |
3209 class VerifyKlassClosure: public KlassClosure { | |
3210 YoungRefCounterClosure _young_ref_counter_closure; | |
3211 OopClosure *_oop_closure; | |
3212 public: | |
3213 VerifyKlassClosure(G1CollectedHeap* g1h, OopClosure* cl) : _young_ref_counter_closure(g1h), _oop_closure(cl) {} | |
3214 void do_klass(Klass* k) { | |
3215 k->oops_do(_oop_closure); | |
3216 | |
3217 _young_ref_counter_closure.reset_count(); | |
3218 k->oops_do(&_young_ref_counter_closure); | |
3219 if (_young_ref_counter_closure.count() > 0) { | |
3220 guarantee(k->has_modified_oops(), err_msg("Klass %p, has young refs but is not dirty.", k)); | |
3221 } | |
3222 } | |
3223 }; | |
3224 | |
342 | 3225 class VerifyLivenessOopClosure: public OopClosure { |
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3226 G1CollectedHeap* _g1h; |
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3227 VerifyOption _vo; |
342 | 3228 public: |
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3229 VerifyLivenessOopClosure(G1CollectedHeap* g1h, VerifyOption vo): |
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3230 _g1h(g1h), _vo(vo) |
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3231 { } |
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3232 void do_oop(narrowOop *p) { do_oop_work(p); } |
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3233 void do_oop( oop *p) { do_oop_work(p); } |
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3234 |
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3235 template <class T> void do_oop_work(T *p) { |
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3236 oop obj = oopDesc::load_decode_heap_oop(p); |
3772
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3237 guarantee(obj == NULL || !_g1h->is_obj_dead_cond(obj, _vo), |
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3238 "Dead object referenced by a not dead object"); |
342 | 3239 } |
3240 }; | |
3241 | |
3242 class VerifyObjsInRegionClosure: public ObjectClosure { | |
811 | 3243 private: |
342 | 3244 G1CollectedHeap* _g1h; |
3245 size_t _live_bytes; | |
3246 HeapRegion *_hr; | |
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3247 VerifyOption _vo; |
342 | 3248 public: |
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3249 // _vo == UsePrevMarking -> use "prev" marking information, |
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3250 // _vo == UseNextMarking -> use "next" marking information, |
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3251 // _vo == UseMarkWord -> use mark word from object header. |
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3252 VerifyObjsInRegionClosure(HeapRegion *hr, VerifyOption vo) |
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3253 : _live_bytes(0), _hr(hr), _vo(vo) { |
342 | 3254 _g1h = G1CollectedHeap::heap(); |
3255 } | |
3256 void do_object(oop o) { | |
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3257 VerifyLivenessOopClosure isLive(_g1h, _vo); |
342 | 3258 assert(o != NULL, "Huh?"); |
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3259 if (!_g1h->is_obj_dead_cond(o, _vo)) { |
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3260 // If the object is alive according to the mark word, |
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3261 // then verify that the marking information agrees. |
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3262 // Note we can't verify the contra-positive of the |
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3263 // above: if the object is dead (according to the mark |
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3264 // word), it may not be marked, or may have been marked |
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3265 // but has since became dead, or may have been allocated |
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3266 // since the last marking. |
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3267 if (_vo == VerifyOption_G1UseMarkWord) { |
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3268 guarantee(!_g1h->is_obj_dead(o), "mark word and concurrent mark mismatch"); |
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3269 } |
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|
3270 |
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|
3271 o->oop_iterate_no_header(&isLive); |
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3272 if (!_hr->obj_allocated_since_prev_marking(o)) { |
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3273 size_t obj_size = o->size(); // Make sure we don't overflow |
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3274 _live_bytes += (obj_size * HeapWordSize); |
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3275 } |
342 | 3276 } |
3277 } | |
3278 size_t live_bytes() { return _live_bytes; } | |
3279 }; | |
3280 | |
3281 class PrintObjsInRegionClosure : public ObjectClosure { | |
3282 HeapRegion *_hr; | |
3283 G1CollectedHeap *_g1; | |
3284 public: | |
3285 PrintObjsInRegionClosure(HeapRegion *hr) : _hr(hr) { | |
3286 _g1 = G1CollectedHeap::heap(); | |
3287 }; | |
3288 | |
3289 void do_object(oop o) { | |
3290 if (o != NULL) { | |
3291 HeapWord *start = (HeapWord *) o; | |
3292 size_t word_sz = o->size(); | |
3293 gclog_or_tty->print("\nPrinting obj "PTR_FORMAT" of size " SIZE_FORMAT | |
3294 " isMarkedPrev %d isMarkedNext %d isAllocSince %d\n", | |
3295 (void*) o, word_sz, | |
3296 _g1->isMarkedPrev(o), | |
3297 _g1->isMarkedNext(o), | |
3298 _hr->obj_allocated_since_prev_marking(o)); | |
3299 HeapWord *end = start + word_sz; | |
3300 HeapWord *cur; | |
3301 int *val; | |
3302 for (cur = start; cur < end; cur++) { | |
3303 val = (int *) cur; | |
3304 gclog_or_tty->print("\t "PTR_FORMAT":"PTR_FORMAT"\n", val, *val); | |
3305 } | |
3306 } | |
3307 } | |
3308 }; | |
3309 | |
3310 class VerifyRegionClosure: public HeapRegionClosure { | |
811 | 3311 private: |
6254
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3312 bool _par; |
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3313 VerifyOption _vo; |
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3314 bool _failures; |
811 | 3315 public: |
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3316 // _vo == UsePrevMarking -> use "prev" marking information, |
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3317 // _vo == UseNextMarking -> use "next" marking information, |
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3318 // _vo == UseMarkWord -> use mark word from object header. |
6008 | 3319 VerifyRegionClosure(bool par, VerifyOption vo) |
3320 : _par(par), | |
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3321 _vo(vo), |
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|
3322 _failures(false) {} |
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|
3323 |
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|
3324 bool failures() { |
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|
3325 return _failures; |
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|
3326 } |
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|
3327 |
342 | 3328 bool doHeapRegion(HeapRegion* r) { |
637
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|
3329 if (!r->continuesHumongous()) { |
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|
3330 bool failures = false; |
6008 | 3331 r->verify(_vo, &failures); |
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|
3332 if (failures) { |
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|
3333 _failures = true; |
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|
3334 } else { |
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|
3335 VerifyObjsInRegionClosure not_dead_yet_cl(r, _vo); |
1020
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|
3336 r->object_iterate(¬_dead_yet_cl); |
4787
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3337 if (_vo != VerifyOption_G1UseNextMarking) { |
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|
3338 if (r->max_live_bytes() < not_dead_yet_cl.live_bytes()) { |
2ace1c4ee8da
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|
3339 gclog_or_tty->print_cr("["PTR_FORMAT","PTR_FORMAT"] " |
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|
3340 "max_live_bytes "SIZE_FORMAT" " |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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|
3341 "< calculated "SIZE_FORMAT, |
2ace1c4ee8da
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|
3342 r->bottom(), r->end(), |
2ace1c4ee8da
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|
3343 r->max_live_bytes(), |
1020
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|
3344 not_dead_yet_cl.live_bytes()); |
4787
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|
3345 _failures = true; |
2ace1c4ee8da
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diff
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|
3346 } |
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|
3347 } else { |
2ace1c4ee8da
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|
3348 // When vo == UseNextMarking we cannot currently do a sanity |
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|
3349 // check on the live bytes as the calculation has not been |
2ace1c4ee8da
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|
3350 // finalized yet. |
1020
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|
3351 } |
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|
3352 } |
342 | 3353 } |
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3354 return false; // stop the region iteration if we hit a failure |
342 | 3355 } |
3356 }; | |
3357 | |
12080 | 3358 // This is the task used for parallel verification of the heap regions |
390 | 3359 |
3360 class G1ParVerifyTask: public AbstractGangTask { | |
3361 private: | |
3362 G1CollectedHeap* _g1h; | |
3772
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3363 VerifyOption _vo; |
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|
3364 bool _failures; |
390 | 3365 |
3366 public: | |
3772
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3367 // _vo == UsePrevMarking -> use "prev" marking information, |
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3368 // _vo == UseNextMarking -> use "next" marking information, |
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3369 // _vo == UseMarkWord -> use mark word from object header. |
6008 | 3370 G1ParVerifyTask(G1CollectedHeap* g1h, VerifyOption vo) : |
390 | 3371 AbstractGangTask("Parallel verify task"), |
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3372 _g1h(g1h), |
3772
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|
3373 _vo(vo), |
1020
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|
3374 _failures(false) { } |
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|
3375 |
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|
3376 bool failures() { |
ff2402f6a50b
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|
3377 return _failures; |
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|
3378 } |
390 | 3379 |
4728
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7121618: Change type of number of GC workers to unsigned int.
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diff
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|
3380 void work(uint worker_id) { |
637
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|
3381 HandleMark hm; |
6008 | 3382 VerifyRegionClosure blk(true, _vo); |
4728
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|
3383 _g1h->heap_region_par_iterate_chunked(&blk, worker_id, |
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|
3384 _g1h->workers()->active_workers(), |
390 | 3385 HeapRegion::ParVerifyClaimValue); |
1020
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|
3386 if (blk.failures()) { |
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|
3387 _failures = true; |
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|
3388 } |
390 | 3389 } |
3390 }; | |
3391 | |
12080 | 3392 void G1CollectedHeap::verify(bool silent, VerifyOption vo) { |
8855
24ef5fb05e0f
8010463: G1: Crashes with -UseTLAB and heap verification
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diff
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|
3393 if (SafepointSynchronize::is_at_safepoint()) { |
12080 | 3394 assert(Thread::current()->is_VM_thread(), |
3395 "Expected to be executed serially by the VM thread at this point"); | |
3396 | |
6725
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|
3397 if (!silent) { gclog_or_tty->print("Roots "); } |
3772
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|
3398 VerifyRootsClosure rootsCl(vo); |
12080 | 3399 G1VerifyCodeRootOopClosure codeRootsCl(this, &rootsCl, vo); |
3400 G1VerifyCodeRootBlobClosure blobsCl(&codeRootsCl); | |
6725
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|
3401 VerifyKlassClosure klassCl(this, &rootsCl); |
3772
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|
3402 |
3293
1f4413413144
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|
3403 // We apply the relevant closures to all the oops in the |
1f4413413144
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diff
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|
3404 // 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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|
3405 const int so = SO_AllClasses | SO_Strings | SO_CodeCache; |
3772
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|
3406 |
6725
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|
3407 // Need cleared claim bits for the strong roots processing |
da91efe96a93
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|
3408 ClassLoaderDataGraph::clear_claimed_marks(); |
da91efe96a93
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|
3409 |
3293
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diff
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|
3410 process_strong_roots(true, // activate StrongRootsScope |
6725
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6964458: Reimplement class meta-data storage to use native memory
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|
3411 false, // we set "is scavenging" to false, |
da91efe96a93
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|
3412 // so we don't reset the dirty cards. |
4910
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|
3413 ScanningOption(so), // roots scanning options |
342 | 3414 &rootsCl, |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
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890
diff
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|
3415 &blobsCl, |
6725
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|
3416 &klassCl |
da91efe96a93
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|
3417 ); |
da91efe96a93
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|
3418 |
12080 | 3419 bool failures = rootsCl.failures() || codeRootsCl.failures(); |
3772
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|
3420 |
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|
3421 if (vo != VerifyOption_G1UseMarkWord) { |
6747fd0512e0
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|
3422 // If we're verifying during a full GC then the region sets |
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|
3423 // will have been torn down at the start of the GC. Therefore |
6747fd0512e0
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diff
changeset
|
3424 // verifying the region sets will fail. So we only verify |
6747fd0512e0
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diff
changeset
|
3425 // the region sets when not in a full GC. |
6747fd0512e0
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3766
diff
changeset
|
3426 if (!silent) { gclog_or_tty->print("HeapRegionSets "); } |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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parents:
3766
diff
changeset
|
3427 verify_region_sets(); |
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
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diff
changeset
|
3428 } |
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diff
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|
3429 |
2152 | 3430 if (!silent) { gclog_or_tty->print("HeapRegions "); } |
390 | 3431 if (GCParallelVerificationEnabled && ParallelGCThreads > 1) { |
3432 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
3433 "sanity check"); | |
3434 | |
6008 | 3435 G1ParVerifyTask task(this, vo); |
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|
3436 assert(UseDynamicNumberOfGCThreads || |
bca17e38de00
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diff
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|
3437 workers()->active_workers() == workers()->total_workers(), |
bca17e38de00
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diff
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|
3438 "If not dynamic should be using all the workers"); |
bca17e38de00
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diff
changeset
|
3439 int n_workers = workers()->active_workers(); |
390 | 3440 set_par_threads(n_workers); |
3441 workers()->run_task(&task); | |
3442 set_par_threads(0); | |
1020
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|
3443 if (task.failures()) { |
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|
3444 failures = true; |
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|
3445 } |
390 | 3446 |
4095
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diff
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|
3447 // Checks that the expected amount of parallel work was done. |
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diff
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|
3448 // The implication is that n_workers is > 0. |
390 | 3449 assert(check_heap_region_claim_values(HeapRegion::ParVerifyClaimValue), |
3450 "sanity check"); | |
3451 | |
3452 reset_heap_region_claim_values(); | |
3453 | |
3454 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
3455 "sanity check"); | |
3456 } else { | |
6008 | 3457 VerifyRegionClosure blk(false, vo); |
3766 | 3458 heap_region_iterate(&blk); |
1020
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|
3459 if (blk.failures()) { |
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diff
changeset
|
3460 failures = true; |
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|
3461 } |
390 | 3462 } |
2152 | 3463 if (!silent) gclog_or_tty->print("RemSet "); |
342 | 3464 rem_set()->verify(); |
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|
3465 |
17764 | 3466 if (G1StringDedup::is_enabled()) { |
3467 if (!silent) gclog_or_tty->print("StrDedup "); | |
3468 G1StringDedup::verify(); | |
3469 } | |
3470 | |
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|
3471 if (failures) { |
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diff
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|
3472 gclog_or_tty->print_cr("Heap:"); |
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
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4072
diff
changeset
|
3473 // 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
|
3474 // help us track down what went wrong. This is why we call |
53074c2c4600
7099849: G1: include heap region information in hs_err files
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diff
changeset
|
3475 // print_extended_on() instead of print_on(). |
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diff
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|
3476 print_extended_on(gclog_or_tty); |
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
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17935
diff
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|
3477 gclog_or_tty->cr(); |
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jcoomes
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1545
diff
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|
3478 #ifndef PRODUCT |
1044 | 3479 if (VerifyDuringGC && G1VerifyDuringGCPrintReachable) { |
1388 | 3480 concurrent_mark()->print_reachable("at-verification-failure", |
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|
3481 vo, false /* all */); |
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|
3482 } |
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diff
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|
3483 #endif |
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|
3484 gclog_or_tty->flush(); |
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|
3485 } |
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|
3486 guarantee(!failures, "there should not have been any failures"); |
342 | 3487 } else { |
17764 | 3488 if (!silent) { |
3489 gclog_or_tty->print("(SKIPPING Roots, HeapRegionSets, HeapRegions, RemSet"); | |
3490 if (G1StringDedup::is_enabled()) { | |
3491 gclog_or_tty->print(", StrDedup"); | |
3492 } | |
3493 gclog_or_tty->print(") "); | |
3494 } | |
342 | 3495 } |
3496 } | |
3497 | |
12080 | 3498 void G1CollectedHeap::verify(bool silent) { |
3499 verify(silent, VerifyOption_G1UsePrevMarking); | |
3500 } | |
3501 | |
3502 double G1CollectedHeap::verify(bool guard, const char* msg) { | |
3503 double verify_time_ms = 0.0; | |
3504 | |
3505 if (guard && total_collections() >= VerifyGCStartAt) { | |
3506 double verify_start = os::elapsedTime(); | |
3507 HandleMark hm; // Discard invalid handles created during verification | |
3508 prepare_for_verify(); | |
3509 Universe::verify(VerifyOption_G1UsePrevMarking, msg); | |
3510 verify_time_ms = (os::elapsedTime() - verify_start) * 1000; | |
3511 } | |
3512 | |
3513 return verify_time_ms; | |
3514 } | |
3515 | |
3516 void G1CollectedHeap::verify_before_gc() { | |
3517 double verify_time_ms = verify(VerifyBeforeGC, " VerifyBeforeGC:"); | |
3518 g1_policy()->phase_times()->record_verify_before_time_ms(verify_time_ms); | |
3519 } | |
3520 | |
3521 void G1CollectedHeap::verify_after_gc() { | |
3522 double verify_time_ms = verify(VerifyAfterGC, " VerifyAfterGC:"); | |
3523 g1_policy()->phase_times()->record_verify_after_time_ms(verify_time_ms); | |
3524 } | |
3525 | |
342 | 3526 class PrintRegionClosure: public HeapRegionClosure { |
3527 outputStream* _st; | |
3528 public: | |
3529 PrintRegionClosure(outputStream* st) : _st(st) {} | |
3530 bool doHeapRegion(HeapRegion* r) { | |
3531 r->print_on(_st); | |
3532 return false; | |
3533 } | |
3534 }; | |
3535 | |
17833
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8038498: Fix includes and C inlining after 8035330
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diff
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|
3536 bool G1CollectedHeap::is_obj_dead_cond(const oop obj, |
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8038498: Fix includes and C inlining after 8035330
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|
3537 const HeapRegion* hr, |
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8038498: Fix includes and C inlining after 8035330
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diff
changeset
|
3538 const VerifyOption vo) const { |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
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diff
changeset
|
3539 switch (vo) { |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
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diff
changeset
|
3540 case VerifyOption_G1UsePrevMarking: return is_obj_dead(obj, hr); |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
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parents:
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diff
changeset
|
3541 case VerifyOption_G1UseNextMarking: return is_obj_ill(obj, hr); |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
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|
3542 case VerifyOption_G1UseMarkWord: return !obj->is_gc_marked(); |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
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diff
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|
3543 default: ShouldNotReachHere(); |
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8038498: Fix includes and C inlining after 8035330
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diff
changeset
|
3544 } |
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8038498: Fix includes and C inlining after 8035330
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changeset
|
3545 return false; // keep some compilers happy |
bfdf528be8e8
8038498: Fix includes and C inlining after 8035330
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diff
changeset
|
3546 } |
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changeset
|
3547 |
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|
3548 bool G1CollectedHeap::is_obj_dead_cond(const oop obj, |
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|
3549 const VerifyOption vo) const { |
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|
3550 switch (vo) { |
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|
3551 case VerifyOption_G1UsePrevMarking: return is_obj_dead(obj); |
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|
3552 case VerifyOption_G1UseNextMarking: return is_obj_ill(obj); |
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|
3553 case VerifyOption_G1UseMarkWord: return !obj->is_gc_marked(); |
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|
3554 default: ShouldNotReachHere(); |
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|
3555 } |
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|
3556 return false; // keep some compilers happy |
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|
3557 } |
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|
3558 |
342 | 3559 void G1CollectedHeap::print_on(outputStream* st) const { |
838
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|
3560 st->print(" %-20s", "garbage-first heap"); |
0316eac49d5a
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|
3561 st->print(" total " SIZE_FORMAT "K, used " SIZE_FORMAT "K", |
846
42d84bbbecf4
6859911: G1: assert(Heap_lock->owner() = NULL, "Should be owned on this thread's behalf")
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845
diff
changeset
|
3562 capacity()/K, used_unlocked()/K); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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|
3563 st->print(" [" INTPTR_FORMAT ", " INTPTR_FORMAT ", " INTPTR_FORMAT ")", |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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|
3564 _g1_storage.low_boundary(), |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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|
3565 _g1_storage.high(), |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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|
3566 _g1_storage.high_boundary()); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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|
3567 st->cr(); |
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3983
diff
changeset
|
3568 st->print(" region size " SIZE_FORMAT "K, ", HeapRegion::GrainBytes / K); |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
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|
3569 uint young_regions = _young_list->length(); |
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7157073: G1: type change size_t -> uint for region counts / indexes
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diff
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|
3570 st->print("%u young (" SIZE_FORMAT "K), ", young_regions, |
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|
3571 (size_t) young_regions * HeapRegion::GrainBytes / K); |
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|
3572 uint survivor_regions = g1_policy()->recorded_survivor_regions(); |
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|
3573 st->print("%u survivors (" SIZE_FORMAT "K)", survivor_regions, |
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7157073: G1: type change size_t -> uint for region counts / indexes
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changeset
|
3574 (size_t) survivor_regions * HeapRegion::GrainBytes / K); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
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changeset
|
3575 st->cr(); |
6863
04155d9c8c76
8000358: G1: metaspace information not printed in PrintHeapAtGC output nor in hs_err file
johnc
parents:
6819
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changeset
|
3576 MetaspaceAux::print_on(st); |
4073
53074c2c4600
7099849: G1: include heap region information in hs_err files
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parents:
4072
diff
changeset
|
3577 } |
53074c2c4600
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diff
changeset
|
3578 |
53074c2c4600
7099849: G1: include heap region information in hs_err files
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changeset
|
3579 void G1CollectedHeap::print_extended_on(outputStream* st) const { |
53074c2c4600
7099849: G1: include heap region information in hs_err files
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parents:
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changeset
|
3580 print_on(st); |
53074c2c4600
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diff
changeset
|
3581 |
53074c2c4600
7099849: G1: include heap region information in hs_err files
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changeset
|
3582 // Print the per-region information. |
53074c2c4600
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|
3583 st->cr(); |
6010
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diff
changeset
|
3584 st->print_cr("Heap Regions: (Y=young(eden), SU=young(survivor), " |
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7157073: G1: type change size_t -> uint for region counts / indexes
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|
3585 "HS=humongous(starts), HC=humongous(continues), " |
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diff
changeset
|
3586 "CS=collection set, F=free, TS=gc time stamp, " |
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7157073: G1: type change size_t -> uint for region counts / indexes
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|
3587 "PTAMS=previous top-at-mark-start, " |
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diff
changeset
|
3588 "NTAMS=next top-at-mark-start)"); |
342 | 3589 PrintRegionClosure blk(st); |
3766 | 3590 heap_region_iterate(&blk); |
342 | 3591 } |
3592 | |
9076
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3593 void G1CollectedHeap::print_on_error(outputStream* st) const { |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3594 this->CollectedHeap::print_on_error(st); |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3595 |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3596 if (_cm != NULL) { |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3597 st->cr(); |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
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parents:
8855
diff
changeset
|
3598 _cm->print_on_error(st); |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3599 } |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3600 } |
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8855
diff
changeset
|
3601 |
342 | 3602 void G1CollectedHeap::print_gc_threads_on(outputStream* st) const { |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
3603 if (G1CollectedHeap::use_parallel_gc_threads()) { |
1019 | 3604 workers()->print_worker_threads_on(st); |
3605 } | |
3606 _cmThread->print_on(st); | |
342 | 3607 st->cr(); |
1019 | 3608 _cm->print_worker_threads_on(st); |
3609 _cg1r->print_worker_threads_on(st); | |
17764 | 3610 if (G1StringDedup::is_enabled()) { |
3611 G1StringDedup::print_worker_threads_on(st); | |
3612 } | |
342 | 3613 } |
3614 | |
3615 void G1CollectedHeap::gc_threads_do(ThreadClosure* tc) const { | |
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1755
diff
changeset
|
3616 if (G1CollectedHeap::use_parallel_gc_threads()) { |
342 | 3617 workers()->threads_do(tc); |
3618 } | |
3619 tc->do_thread(_cmThread); | |
794 | 3620 _cg1r->threads_do(tc); |
17764 | 3621 if (G1StringDedup::is_enabled()) { |
3622 G1StringDedup::threads_do(tc); | |
3623 } | |
342 | 3624 } |
3625 | |
3626 void G1CollectedHeap::print_tracing_info() const { | |
3627 // We'll overload this to mean "trace GC pause statistics." | |
3628 if (TraceGen0Time || TraceGen1Time) { | |
3629 // The "G1CollectorPolicy" is keeping track of these stats, so delegate | |
3630 // to that. | |
3631 g1_policy()->print_tracing_info(); | |
3632 } | |
751 | 3633 if (G1SummarizeRSetStats) { |
342 | 3634 g1_rem_set()->print_summary_info(); |
3635 } | |
1282 | 3636 if (G1SummarizeConcMark) { |
342 | 3637 concurrent_mark()->print_summary_info(); |
3638 } | |
3639 g1_policy()->print_yg_surv_rate_info(); | |
3640 SpecializationStats::print(); | |
3641 } | |
3642 | |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
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3774
diff
changeset
|
3643 #ifndef PRODUCT |
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7046182: G1: remove unnecessary iterations over the collection set
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3774
diff
changeset
|
3644 // Helpful for debugging RSet issues. |
e8b0b0392037
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changeset
|
3645 |
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diff
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|
3646 class PrintRSetsClosure : public HeapRegionClosure { |
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7046182: G1: remove unnecessary iterations over the collection set
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3774
diff
changeset
|
3647 private: |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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diff
changeset
|
3648 const char* _msg; |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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3774
diff
changeset
|
3649 size_t _occupied_sum; |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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3774
diff
changeset
|
3650 |
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7046182: G1: remove unnecessary iterations over the collection set
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diff
changeset
|
3651 public: |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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changeset
|
3652 bool doHeapRegion(HeapRegion* r) { |
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7046182: G1: remove unnecessary iterations over the collection set
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parents:
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diff
changeset
|
3653 HeapRegionRemSet* hrrs = r->rem_set(); |
e8b0b0392037
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parents:
3774
diff
changeset
|
3654 size_t occupied = hrrs->occupied(); |
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7046182: G1: remove unnecessary iterations over the collection set
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3774
diff
changeset
|
3655 _occupied_sum += occupied; |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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diff
changeset
|
3656 |
e8b0b0392037
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diff
changeset
|
3657 gclog_or_tty->print_cr("Printing RSet for region "HR_FORMAT, |
e8b0b0392037
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parents:
3774
diff
changeset
|
3658 HR_FORMAT_PARAMS(r)); |
e8b0b0392037
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3774
diff
changeset
|
3659 if (occupied == 0) { |
e8b0b0392037
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parents:
3774
diff
changeset
|
3660 gclog_or_tty->print_cr(" RSet is empty"); |
e8b0b0392037
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3774
diff
changeset
|
3661 } else { |
e8b0b0392037
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3774
diff
changeset
|
3662 hrrs->print(); |
e8b0b0392037
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3774
diff
changeset
|
3663 } |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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parents:
3774
diff
changeset
|
3664 gclog_or_tty->print_cr("----------"); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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3774
diff
changeset
|
3665 return false; |
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3774
diff
changeset
|
3666 } |
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diff
changeset
|
3667 |
e8b0b0392037
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diff
changeset
|
3668 PrintRSetsClosure(const char* msg) : _msg(msg), _occupied_sum(0) { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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parents:
3774
diff
changeset
|
3669 gclog_or_tty->cr(); |
e8b0b0392037
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3774
diff
changeset
|
3670 gclog_or_tty->print_cr("========================================"); |
17937
78bbf4d43a14
8037816: Fix for 8036122 breaks build with Xcode5/clang
drchase
parents:
17935
diff
changeset
|
3671 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
|
3672 gclog_or_tty->cr(); |
e8b0b0392037
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3774
diff
changeset
|
3673 } |
e8b0b0392037
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diff
changeset
|
3674 |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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diff
changeset
|
3675 ~PrintRSetsClosure() { |
e8b0b0392037
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diff
changeset
|
3676 gclog_or_tty->print_cr("Occupied Sum: "SIZE_FORMAT, _occupied_sum); |
e8b0b0392037
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3774
diff
changeset
|
3677 gclog_or_tty->print_cr("========================================"); |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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parents:
3774
diff
changeset
|
3678 gclog_or_tty->cr(); |
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3774
diff
changeset
|
3679 } |
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3774
diff
changeset
|
3680 }; |
e8b0b0392037
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diff
changeset
|
3681 |
e8b0b0392037
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diff
changeset
|
3682 void G1CollectedHeap::print_cset_rsets() { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
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parents:
3774
diff
changeset
|
3683 PrintRSetsClosure cl("Printing CSet RSets"); |
e8b0b0392037
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tonyp
parents:
3774
diff
changeset
|
3684 collection_set_iterate(&cl); |
e8b0b0392037
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parents:
3774
diff
changeset
|
3685 } |
e8b0b0392037
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3774
diff
changeset
|
3686 |
e8b0b0392037
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diff
changeset
|
3687 void G1CollectedHeap::print_all_rsets() { |
e8b0b0392037
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parents:
3774
diff
changeset
|
3688 PrintRSetsClosure cl("Printing All RSets");; |
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7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3689 heap_region_iterate(&cl); |
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 #endif // PRODUCT |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3692 |
342 | 3693 G1CollectedHeap* G1CollectedHeap::heap() { |
3694 assert(_sh->kind() == CollectedHeap::G1CollectedHeap, | |
3695 "not a garbage-first heap"); | |
3696 return _g1h; | |
3697 } | |
3698 | |
3699 void G1CollectedHeap::gc_prologue(bool full /* Ignored */) { | |
1245
6484c4ee11cb
6904516: More object array barrier fixes, following up on 6906727
ysr
parents:
1166
diff
changeset
|
3700 // always_do_update_barrier = false; |
342 | 3701 assert(InlineCacheBuffer::is_empty(), "should have cleaned up ICBuffer"); |
3702 // Fill TLAB's and such | |
17727 | 3703 accumulate_statistics_all_tlabs(); |
342 | 3704 ensure_parsability(true); |
12339
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3705 |
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3706 if (G1SummarizeRSetStats && (G1SummarizeRSetStatsPeriod > 0) && |
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3707 (total_collections() % G1SummarizeRSetStatsPeriod == 0)) { |
c319b188c7b2
8014078: G1: improve remembered set summary information by providing per region type information
tschatzl
parents:
12305
diff
changeset
|
3708 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
|
3709 } |
342 | 3710 } |
3711 | |
3712 void G1CollectedHeap::gc_epilogue(bool full /* Ignored */) { | |
10372
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3713 |
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3714 if (G1SummarizeRSetStats && |
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3715 (G1SummarizeRSetStatsPeriod > 0) && |
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3716 // 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
|
3717 ((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
|
3718 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
|
3719 } |
e72f7eecc96d
8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen
tschatzl
parents:
10327
diff
changeset
|
3720 |
342 | 3721 // FIXME: what is this about? |
3722 // I'm ignoring the "fill_newgen()" call if "alloc_event_enabled" | |
3723 // is set. | |
3724 COMPILER2_PRESENT(assert(DerivedPointerTable::is_empty(), | |
3725 "derived pointer present")); | |
1245
6484c4ee11cb
6904516: More object array barrier fixes, following up on 6906727
ysr
parents:
1166
diff
changeset
|
3726 // always_do_update_barrier = true; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3727 |
17727 | 3728 resize_all_tlabs(); |
3729 | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3730 // We have just completed a GC. Update the soft reference |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3731 // policy with the new heap occupancy |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
3732 Universe::update_heap_info_at_gc(); |
342 | 3733 } |
3734 | |
1973 | 3735 HeapWord* G1CollectedHeap::do_collection_pause(size_t word_size, |
3736 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
|
3737 bool* succeeded, |
f7d3b4387a16
8022872: G1: Use correct GC cause for young GC triggered by humongous allocations
brutisso
parents:
12082
diff
changeset
|
3738 GCCause::Cause gc_cause) { |
1973 | 3739 assert_heap_not_locked_and_not_at_safepoint(); |
342 | 3740 g1_policy()->record_stop_world_start(); |
1973 | 3741 VM_G1IncCollectionPause op(gc_count_before, |
3742 word_size, | |
3743 false, /* should_initiate_conc_mark */ | |
3744 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
|
3745 gc_cause); |
1973 | 3746 VMThread::execute(&op); |
3747 | |
3748 HeapWord* result = op.result(); | |
3749 bool ret_succeeded = op.prologue_succeeded() && op.pause_succeeded(); | |
3750 assert(result == NULL || ret_succeeded, | |
3751 "the result should be NULL if the VM did not succeed"); | |
3752 *succeeded = ret_succeeded; | |
3753 | |
3754 assert_heap_not_locked(); | |
3755 return result; | |
342 | 3756 } |
3757 | |
3758 void | |
3759 G1CollectedHeap::doConcurrentMark() { | |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3760 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
|
3761 if (!_cmThread->in_progress()) { |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3762 _cmThread->set_started(); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3763 CGC_lock->notify(); |
342 | 3764 } |
3765 } | |
3766 | |
3767 size_t G1CollectedHeap::pending_card_num() { | |
3768 size_t extra_cards = 0; | |
3769 JavaThread *curr = Threads::first(); | |
3770 while (curr != NULL) { | |
3771 DirtyCardQueue& dcq = curr->dirty_card_queue(); | |
3772 extra_cards += dcq.size(); | |
3773 curr = curr->next(); | |
3774 } | |
3775 DirtyCardQueueSet& dcqs = JavaThread::dirty_card_queue_set(); | |
3776 size_t buffer_size = dcqs.buffer_size(); | |
3777 size_t buffer_num = dcqs.completed_buffers_num(); | |
6611 | 3778 |
3779 // PtrQueueSet::buffer_size() and PtrQueue:size() return sizes | |
3780 // in bytes - not the number of 'entries'. We need to convert | |
3781 // into a number of cards. | |
3782 return (buffer_size * buffer_num + extra_cards) / oopSize; | |
342 | 3783 } |
3784 | |
3785 size_t G1CollectedHeap::cards_scanned() { | |
1861 | 3786 return g1_rem_set()->cardsScanned(); |
342 | 3787 } |
3788 | |
3789 void | |
3790 G1CollectedHeap::setup_surviving_young_words() { | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3791 assert(_surviving_young_words == NULL, "pre-condition"); |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3792 uint array_length = g1_policy()->young_cset_region_length(); |
6197 | 3793 _surviving_young_words = NEW_C_HEAP_ARRAY(size_t, (size_t) array_length, mtGC); |
342 | 3794 if (_surviving_young_words == NULL) { |
10161
746b070f5022
8011661: Insufficient memory message says "malloc" when sometimes it should say "mmap"
ccheung
parents:
10099
diff
changeset
|
3795 vm_exit_out_of_memory(sizeof(size_t) * array_length, OOM_MALLOC_ERROR, |
342 | 3796 "Not enough space for young surv words summary."); |
3797 } | |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3798 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
|
3799 #ifdef ASSERT |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3800 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
|
3801 assert( _surviving_young_words[i] == 0, "memset above" ); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3802 } |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
3803 #endif // !ASSERT |
342 | 3804 } |
3805 | |
3806 void | |
3807 G1CollectedHeap::update_surviving_young_words(size_t* surv_young_words) { | |
3808 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
|
3809 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
|
3810 for (uint i = 0; i < array_length; ++i) { |
342 | 3811 _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
|
3812 } |
342 | 3813 } |
3814 | |
3815 void | |
3816 G1CollectedHeap::cleanup_surviving_young_words() { | |
3817 guarantee( _surviving_young_words != NULL, "pre-condition" ); | |
6197 | 3818 FREE_C_HEAP_ARRAY(size_t, _surviving_young_words, mtGC); |
342 | 3819 _surviving_young_words = NULL; |
3820 } | |
3821 | |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3822 #ifdef ASSERT |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3823 class VerifyCSetClosure: public HeapRegionClosure { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3824 public: |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3825 bool doHeapRegion(HeapRegion* hr) { |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3826 // 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
|
3827 // 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
|
3828 // 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
|
3829 // 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
|
3830 // 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
|
3831 // 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
|
3832 // 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
|
3833 // 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
|
3834 // evacuation failure handling. |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3835 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
|
3836 |
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3837 // 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
|
3838 // perform on CSet regions. |
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3839 return false; |
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3840 } |
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3841 }; |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
3842 #endif // ASSERT |
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
3843 |
1709 | 3844 #if TASKQUEUE_STATS |
3845 void G1CollectedHeap::print_taskqueue_stats_hdr(outputStream* const st) { | |
3846 st->print_raw_cr("GC Task Stats"); | |
3847 st->print_raw("thr "); TaskQueueStats::print_header(1, st); st->cr(); | |
3848 st->print_raw("--- "); TaskQueueStats::print_header(2, st); st->cr(); | |
3849 } | |
3850 | |
3851 void G1CollectedHeap::print_taskqueue_stats(outputStream* const st) const { | |
3852 print_taskqueue_stats_hdr(st); | |
3853 | |
3854 TaskQueueStats totals; | |
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3855 const int n = workers() != NULL ? workers()->total_workers() : 1; |
1709 | 3856 for (int i = 0; i < n; ++i) { |
3857 st->print("%3d ", i); task_queue(i)->stats.print(st); st->cr(); | |
3858 totals += task_queue(i)->stats; | |
3859 } | |
3860 st->print_raw("tot "); totals.print(st); st->cr(); | |
3861 | |
3862 DEBUG_ONLY(totals.verify()); | |
3863 } | |
3864 | |
3865 void G1CollectedHeap::reset_taskqueue_stats() { | |
1755
8e5955ddf8e4
6978300: G1: debug builds crash if ParallelGCThreads==0
jcoomes
parents:
1719
diff
changeset
|
3866 const int n = workers() != NULL ? workers()->total_workers() : 1; |
1709 | 3867 for (int i = 0; i < n; ++i) { |
3868 task_queue(i)->stats.reset(); | |
3869 } | |
3870 } | |
3871 #endif // TASKQUEUE_STATS | |
3872 | |
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3873 void G1CollectedHeap::log_gc_header() { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3874 if (!G1Log::fine()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3875 return; |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3876 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3877 |
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
3878 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
|
3879 |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3880 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
|
3881 .append(g1_policy()->gcs_are_young() ? "(young)" : "(mixed)") |
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3882 .append(g1_policy()->during_initial_mark_pause() ? " (initial-mark)" : ""); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3883 |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3884 gclog_or_tty->print("[%s", (const char*)gc_cause_str); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3885 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3886 |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3887 void G1CollectedHeap::log_gc_footer(double pause_time_sec) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3888 if (!G1Log::fine()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3889 return; |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3890 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3891 |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3892 if (G1Log::finer()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3893 if (evacuation_failed()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3894 gclog_or_tty->print(" (to-space exhausted)"); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3895 } |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3896 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
|
3897 g1_policy()->phase_times()->note_gc_end(); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3898 g1_policy()->phase_times()->print(pause_time_sec); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3899 g1_policy()->print_detailed_heap_transition(); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3900 } else { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3901 if (evacuation_failed()) { |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3902 gclog_or_tty->print("--"); |
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 g1_policy()->print_heap_transition(); |
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3905 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
|
3906 } |
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
3907 gclog_or_tty->flush(); |
6752
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 |
1973 | 3910 bool |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3911 G1CollectedHeap::do_collection_pause_at_safepoint(double target_pause_time_ms) { |
2152 | 3912 assert_at_safepoint(true /* should_be_vm_thread */); |
3913 guarantee(!is_gc_active(), "collection is not reentrant"); | |
3914 | |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3915 if (GC_locker::check_active_before_gc()) { |
1973 | 3916 return false; |
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3917 } |
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1313
diff
changeset
|
3918 |
13400
86e6d691f2e1
8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
13062
diff
changeset
|
3919 _gc_timer_stw->register_gc_start(); |
10405 | 3920 |
3921 _gc_tracer_stw->report_gc_start(gc_cause(), _gc_timer_stw->gc_start()); | |
3922 | |
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2039
diff
changeset
|
3923 SvcGCMarker sgcm(SvcGCMarker::MINOR); |
2039
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3924 ResourceMark rm; |
7c5250dbd584
6896624: G1: hotspot:::gc and hotspot:::mem-pool-gc probes are not fired
tonyp
parents:
2038
diff
changeset
|
3925 |
4872
aa3d708d67c4
7141200: log some interesting information in ring buffers for crashes
never
parents:
4787
diff
changeset
|
3926 print_heap_before_gc(); |
10405 | 3927 trace_heap_before_gc(_gc_tracer_stw); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3928 |
2152 | 3929 verify_region_sets_optional(); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
3930 verify_dirty_young_regions(); |
2152 | 3931 |
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3932 // 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
|
3933 // 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
|
3934 // for the duration of this pause. |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3935 g1_policy()->decide_on_conc_mark_initiation(); |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3936 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3937 // 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
|
3938 assert(!g1_policy()->during_initial_mark_pause() || |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3939 g1_policy()->gcs_are_young(), "sanity"); |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3940 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3941 // 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
|
3942 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
|
3943 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3944 // 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
|
3945 // 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
|
3946 // 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
|
3947 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
|
3948 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
3949 // 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
|
3950 { |
10405 | 3951 EvacuationInfo evacuation_info; |
3952 | |
1656
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3953 if (g1_policy()->during_initial_mark_pause()) { |
4e5661ba9d98
6944166: G1: explicit GCs are not always handled correctly
tonyp
parents:
1611
diff
changeset
|
3954 // 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
|
3955 // full collection counter. |
6120
37552638d24a
7172388: G1: _total_full_collections should not be incremented for concurrent cycles
brutisso
parents:
6109
diff
changeset
|
3956 increment_old_marking_cycles_started(); |
10405 | 3957 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
|
3958 } |
10405 | 3959 |
3960 _gc_tracer_stw->report_yc_type(yc_type()); | |
3961 | |
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5987
diff
changeset
|
3962 TraceCPUTime tcpu(G1Log::finer(), true, gclog_or_tty); |
6030 | 3963 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
3964 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
|
3965 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
|
3966 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
|
3967 g1_policy()->phase_times()->note_gc_start(active_workers); |
6752
9646b7ff4d14
7198130: G1: PrintReferenceGC output comes out of order
brutisso
parents:
6725
diff
changeset
|
3968 log_gc_header(); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3969 |
3289
b52782ae3880
6946417: G1: Java VisualVM does not support G1 properly.
jmasa
parents:
3285
diff
changeset
|
3970 TraceCollectorStats tcs(g1mm()->incremental_collection_counters()); |
3356
78542e2b5e35
7036199: Adding a notification to the implementation of GarbageCollectorMXBeans
fparain
parents:
3323
diff
changeset
|
3971 TraceMemoryManagerStats tms(false /* fullGC */, gc_cause()); |
1089
db0d5eba9d20
6815790: G1: Missing MemoryPoolMXBeans with -XX:+UseG1GC
tonyp
parents:
1088
diff
changeset
|
3972 |
2361 | 3973 // If the secondary_free_list is not empty, append it to the |
3974 // free_list. No need to wait for the cleanup operation to finish; | |
3975 // the region allocation code will check the secondary_free_list | |
3976 // and wait if necessary. If the G1StressConcRegionFreeing flag is | |
3977 // set, skip this step so that the region allocation code has to | |
3978 // get entries from the secondary_free_list. | |
2152 | 3979 if (!G1StressConcRegionFreeing) { |
2361 | 3980 append_secondary_free_list_if_not_empty_with_lock(); |
2152 | 3981 } |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3982 |
12080 | 3983 assert(check_young_list_well_formed(), "young list should be well formed"); |
3984 assert(check_heap_region_claim_values(HeapRegion::InitialClaimValue), | |
3985 "sanity check"); | |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3986 |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3987 // 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
|
3988 // 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
|
3989 // it will be set. |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
3990 |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3991 { // 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
|
3992 IsGCActiveMark x; |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3993 |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3994 gc_prologue(false); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3995 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
|
3996 increment_gc_time_stamp(); |
342 | 3997 |
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
|
3998 verify_before_gc(); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
3999 |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4000 COMPILER2_PRESENT(DerivedPointerTable::clear()); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4001 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4002 // Please see comment in g1CollectedHeap.hpp and |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4003 // G1CollectedHeap::ref_processing_init() to see how |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4004 // reference processing currently works in G1. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4005 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4006 // Enable discovery in the STW reference processor |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4007 ref_processor_stw()->enable_discovery(true /*verify_disabled*/, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4008 true /*verify_no_refs*/); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4009 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4010 { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4011 // We want to temporarily turn off discovery by the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4012 // CM ref processor, if necessary, and turn it back on |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4013 // on again later if we do. Using a scoped |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4014 // NoRefDiscovery object will do this. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4015 NoRefDiscovery no_cm_discovery(ref_processor_cm()); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4016 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4017 // 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
|
4018 // of the collection set!). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4019 release_mutator_alloc_region(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4020 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4021 // We should call this after we retire the mutator alloc |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4022 // region(s) so that all the ALLOC / RETIRE events are generated |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4023 // before the start GC event. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4024 _hr_printer.start_gc(false /* full */, (size_t) total_collections()); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4025 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4026 // 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
|
4027 // 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
|
4028 // 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
|
4029 // |
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4030 // 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
|
4031 // |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4032 // The elapsed time induced by the start time below deliberately elides |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4033 // 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
|
4034 double sample_start_time_sec = os::elapsedTime(); |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4035 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4036 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4037 gclog_or_tty->print_cr("\nBefore recording pause start.\nYoung_list:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4038 _young_list->print(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4039 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
|
4040 #endif // YOUNG_LIST_VERBOSE |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4041 |
10098
71013d764f6e
8010780: G1: Eden occupancy/capacity output wrong after a full GC
johnc
parents:
8855
diff
changeset
|
4042 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
|
4043 |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4044 double scan_wait_start = os::elapsedTime(); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4045 // 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
|
4046 // 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
|
4047 // 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
|
4048 // moving them during the GC. |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4049 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
|
4050 double wait_time_ms = 0.0; |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4051 if (waited) { |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4052 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
|
4053 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
|
4054 } |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4055 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
|
4056 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4057 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4058 gclog_or_tty->print_cr("\nAfter recording pause start.\nYoung_list:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4059 _young_list->print(); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4060 #endif // YOUNG_LIST_VERBOSE |
342 | 4061 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4062 if (g1_policy()->during_initial_mark_pause()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4063 concurrent_mark()->checkpointRootsInitialPre(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4064 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4065 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4066 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4067 gclog_or_tty->print_cr("\nBefore choosing collection set.\nYoung_list:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4068 _young_list->print(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4069 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
|
4070 #endif // YOUNG_LIST_VERBOSE |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4071 |
10405 | 4072 g1_policy()->finalize_cset(target_pause_time_ms, evacuation_info); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4073 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4074 _cm->note_start_of_gc(); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4075 // 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
|
4076 // 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
|
4077 // 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
|
4078 // ensure that the CSet has been finalized. |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4079 _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
|
4080 true /* verify_enqueued_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4081 false /* verify_thread_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4082 true /* verify_fingers */); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4083 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4084 if (_hr_printer.is_active()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4085 HeapRegion* hr = g1_policy()->collection_set(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4086 while (hr != NULL) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4087 G1HRPrinter::RegionType type; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4088 if (!hr->is_young()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4089 type = G1HRPrinter::Old; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4090 } else if (hr->is_survivor()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4091 type = G1HRPrinter::Survivor; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4092 } else { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4093 type = G1HRPrinter::Eden; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4094 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4095 _hr_printer.cset(hr); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4096 hr = hr->next_in_collection_set(); |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4097 } |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4098 } |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4099 |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
4100 #ifdef ASSERT |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4101 VerifyCSetClosure cl; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4102 collection_set_iterate(&cl); |
3777
e8b0b0392037
7046182: G1: remove unnecessary iterations over the collection set
tonyp
parents:
3774
diff
changeset
|
4103 #endif // ASSERT |
1707 | 4104 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4105 setup_surviving_young_words(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4106 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4107 // Initialize the GC alloc regions. |
10405 | 4108 init_gc_alloc_regions(evacuation_info); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4109 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4110 // Actually do the work... |
10405 | 4111 evacuate_collection_set(evacuation_info); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4112 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4113 // 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
|
4114 // (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
|
4115 // 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
|
4116 // 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
|
4117 // we checked. |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4118 _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
|
4119 false /* verify_enqueued_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4120 true /* verify_thread_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4121 true /* verify_fingers */); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4122 |
10405 | 4123 free_collection_set(g1_policy()->collection_set(), evacuation_info); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4124 g1_policy()->clear_collection_set(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4125 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4126 cleanup_surviving_young_words(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4127 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4128 // Start a new incremental collection set for the next pause. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4129 g1_policy()->start_incremental_cset_building(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4130 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4131 clear_cset_fast_test(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4132 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4133 _young_list->reset_sampled_info(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4134 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4135 // Don't check the whole heap at this point as the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4136 // GC alloc regions from this pause have been tagged |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4137 // as survivors and moved on to the survivor list. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4138 // Survivor regions will fail the !is_young() check. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4139 assert(check_young_list_empty(false /* check_heap */), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4140 "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
|
4141 |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4142 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4143 gclog_or_tty->print_cr("Before recording survivors.\nYoung List:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4144 _young_list->print(); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4145 #endif // YOUNG_LIST_VERBOSE |
342 | 4146 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4147 g1_policy()->record_survivor_regions(_young_list->survivor_length(), |
10405 | 4148 _young_list->first_survivor_region(), |
4149 _young_list->last_survivor_region()); | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4150 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4151 _young_list->reset_auxilary_lists(); |
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 if (evacuation_failed()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4154 _summary_bytes_used = recalculate_used(); |
10405 | 4155 uint n_queues = MAX2((int)ParallelGCThreads, 1); |
4156 for (uint i = 0; i < n_queues; i++) { | |
4157 if (_evacuation_failed_info_array[i].has_failed()) { | |
4158 _gc_tracer_stw->report_evacuation_failed(_evacuation_failed_info_array[i]); | |
4159 } | |
4160 } | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4161 } else { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4162 // The "used" of the the collection set have already been subtracted |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4163 // when they were freed. Add in the bytes evacuated. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4164 _summary_bytes_used += g1_policy()->bytes_copied_during_gc(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4165 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4166 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4167 if (g1_policy()->during_initial_mark_pause()) { |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
4168 // 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
|
4169 // 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
|
4170 // appropriate initialization is done on the CM object. |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4171 concurrent_mark()->checkpointRootsInitialPost(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4172 set_marking_started(); |
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4173 // 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
|
4174 // 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
|
4175 // the current thread has completed its logging output. |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4176 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4177 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4178 allocate_dummy_regions(); |
3285
49a67202bc67
7011855: G1: non-product flag to artificially grow the heap
tonyp
parents:
2433
diff
changeset
|
4179 |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
4180 #if YOUNG_LIST_VERBOSE |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4181 gclog_or_tty->print_cr("\nEnd of the pause.\nYoung_list:"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4182 _young_list->print(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4183 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
|
4184 #endif // YOUNG_LIST_VERBOSE |
342 | 4185 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4186 init_mutator_alloc_region(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4187 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4188 { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4189 size_t expand_bytes = g1_policy()->expansion_amount(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4190 if (expand_bytes > 0) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4191 size_t bytes_before = capacity(); |
4785 | 4192 // No need for an ergo verbose message here, |
4193 // expansion_amount() does this when it returns a value > 0. | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4194 if (!expand(expand_bytes)) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4195 // We failed to expand the heap so let's verify that |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4196 // committed/uncommitted amount match the backing store |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4197 assert(capacity() == _g1_storage.committed_size(), "committed size mismatch"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4198 assert(max_capacity() == _g1_storage.reserved_size(), "reserved size mismatch"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4199 } |
3920
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4200 } |
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4201 } |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4202 |
10405 | 4203 // 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
|
4204 // 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
|
4205 _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
|
4206 true /* verify_enqueued_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4207 true /* verify_thread_buffers */, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4208 true /* verify_fingers */); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4209 _cm->note_end_of_gc(); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4210 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4211 // 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
|
4212 // 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
|
4213 // 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
|
4214 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
|
4215 double pause_time_ms = (sample_end_time_sec - sample_start_time_sec) * MILLIUNITS; |
10405 | 4216 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
|
4217 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4218 MemoryService::track_memory_usage(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4219 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4220 // 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
|
4221 // update buffers to bring the RSets up-to-date if |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4222 // G1HRRSFlushLogBuffersOnVerify has been set. While scanning |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4223 // 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
|
4224 // regions we just allocated to (i.e., the GC alloc |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4225 // regions). However, during the last GC we called |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4226 // set_saved_mark() on all the GC alloc regions, so card |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4227 // scanning might skip the [saved_mark_word()...top()] area of |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4228 // those regions (i.e., the area we allocated objects into |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4229 // during the last GC). But it shouldn't. Given that |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4230 // saved_mark_word() is conditional on whether the GC time stamp |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4231 // 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
|
4232 // 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
|
4233 // regions and saved_mark_word() will simply return top() for |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4234 // 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
|
4235 // than iterating over the regions and fixing them. In fact, the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4236 // GC time stamp increment here also ensures that |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4237 // saved_mark_word() will return top() between pauses, i.e., |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4238 // during concurrent refinement. So we don't need the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4239 // is_gc_active() check to decided which top to use when |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4240 // scanning cards (see CR 7039627). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4241 increment_gc_time_stamp(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4242 |
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
|
4243 verify_after_gc(); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4244 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4245 assert(!ref_processor_stw()->discovery_enabled(), "Postcondition"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4246 ref_processor_stw()->verify_no_references_recorded(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4247 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4248 // 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
|
4249 } |
af2ab04e0038
6929868: G1: introduce min / max young gen size bounds
brutisso
parents:
3919
diff
changeset
|
4250 |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4251 // 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
|
4252 // 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
|
4253 // 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
|
4254 // RETIRE events are generated before the end GC event. |
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4255 _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
|
4256 |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4257 if (mark_in_progress()) { |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4258 concurrent_mark()->update_g1_committed(); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4259 } |
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4260 |
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4261 #ifdef TRACESPINNING |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4262 ParallelTaskTerminator::print_termination_counts(); |
546
05c6d52fa7a9
6690928: Use spinning in combination with yields for workstealing termination.
jmasa
parents:
545
diff
changeset
|
4263 #endif |
342 | 4264 |
838
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4265 gc_epilogue(false); |
0316eac49d5a
6855834: G1: minimize the output when -XX:+PrintHeapAtGC is set
tonyp
parents:
811
diff
changeset
|
4266 } |
6121
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4267 |
7207
0f80645e9c26
8004170: G1: Verbose GC output is not getting flushed to log file using JDK 8
johnc
parents:
6863
diff
changeset
|
4268 // 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
|
4269 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
|
4270 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
4271 // 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
|
4272 // 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
|
4273 // 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
|
4274 // logging output either. |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4275 |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4276 _hrs.verify_optional(); |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4277 verify_region_sets_optional(); |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4278 |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4279 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
|
4280 TASKQUEUE_STATS_ONLY(reset_taskqueue_stats()); |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4281 |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4282 print_heap_after_gc(); |
10405 | 4283 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
|
4284 |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4285 // 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
|
4286 // 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
|
4287 // 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
|
4288 // before any GC notifications are raised. |
b9442ac22f59
7173460: G1: java/lang/management/MemoryMXBean/CollectionUsageThreshold.java failes with G1
brutisso
parents:
6120
diff
changeset
|
4289 g1mm()->update_sizes(); |
10405 | 4290 |
4291 _gc_tracer_stw->report_evacuation_info(&evacuation_info); | |
4292 _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
|
4293 _gc_timer_stw->register_gc_end(); |
10405 | 4294 _gc_tracer_stw->report_gc_end(_gc_timer_stw->gc_end(), _gc_timer_stw->time_partitions()); |
4295 } | |
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4296 // 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
|
4297 // 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
|
4298 // that came from the pause. |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4299 |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4300 if (should_start_conc_mark) { |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4301 // CAUTION: after the doConcurrentMark() call below, |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4302 // the concurrent marking thread(s) could be running |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4303 // concurrently with us. Make sure that anything after |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4304 // 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
|
4305 // 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
|
4306 // not start until the safepoint itself is released in |
20192 | 4307 // SuspendibleThreadSet::desynchronize(). |
4831
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4308 doConcurrentMark(); |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4309 } |
7ca7be5a6a0b
7129271: G1: Interference from multiple threads in PrintGC/PrintGCDetails output
johnc
parents:
4829
diff
changeset
|
4310 |
1973 | 4311 return true; |
342 | 4312 } |
4313 | |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4314 size_t G1CollectedHeap::desired_plab_sz(GCAllocPurpose purpose) |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4315 { |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4316 size_t gclab_word_size; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4317 switch (purpose) { |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4318 case GCAllocForSurvived: |
6595 | 4319 gclab_word_size = _survivor_plab_stats.desired_plab_sz(); |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4320 break; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4321 case GCAllocForTenured: |
6595 | 4322 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4323 break; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4324 default: |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4325 assert(false, "unknown GCAllocPurpose"); |
6595 | 4326 gclab_word_size = _old_plab_stats.desired_plab_sz(); |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4327 break; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4328 } |
6595 | 4329 |
4330 // Prevent humongous PLAB sizes for two reasons: | |
4331 // * PLABs are allocated using a similar paths as oops, but should | |
4332 // never be in a humongous region | |
4333 // * Allowing humongous PLABs needlessly churns the region free lists | |
4334 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
|
4335 } |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4336 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4337 void G1CollectedHeap::init_mutator_alloc_region() { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4338 assert(_mutator_alloc_region.get() == NULL, "pre-condition"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4339 _mutator_alloc_region.init(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4340 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4341 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4342 void G1CollectedHeap::release_mutator_alloc_region() { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4343 _mutator_alloc_region.release(); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4344 assert(_mutator_alloc_region.get() == NULL, "post-condition"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
4345 } |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4346 |
10405 | 4347 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
|
4348 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
|
4349 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4350 _survivor_gc_alloc_region.init(); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4351 _old_gc_alloc_region.init(); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4352 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
|
4353 _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
|
4354 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4355 // 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
|
4356 // 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
|
4357 // 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
|
4358 // 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
|
4359 // 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
|
4360 // 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
|
4361 // during a cleanup and was added to the free list, but |
10405 | 4362 // 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
|
4363 // 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
|
4364 if (retained_region != NULL && |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4365 !retained_region->in_collection_set() && |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4366 !(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
|
4367 !retained_region->is_empty() && |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4368 !retained_region->isHumongous()) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4369 retained_region->set_saved_mark(); |
4072 | 4370 // The retained region was added to the old region set when it was |
4371 // retired. We have to remove it now, since we don't allow regions | |
4372 // we allocate to in the region sets. We'll re-add it later, when | |
4373 // it's retired again. | |
4374 _old_set.remove(retained_region); | |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4375 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
|
4376 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
|
4377 _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
|
4378 _hr_printer.reuse(retained_region); |
10405 | 4379 evacuation_info.set_alloc_regions_used_before(retained_region->used()); |
4380 } | |
4381 } | |
4382 | |
4383 void G1CollectedHeap::release_gc_alloc_regions(uint no_of_gc_workers, EvacuationInfo& evacuation_info) { | |
4384 evacuation_info.set_allocation_regions(_survivor_gc_alloc_region.count() + | |
4385 _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
|
4386 _survivor_gc_alloc_region.release(); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4387 // 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
|
4388 // _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
|
4389 // _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
|
4390 // 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
|
4391 // condition. |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4392 _retained_old_gc_alloc_region = _old_gc_alloc_region.release(); |
6595 | 4393 |
4394 if (ResizePLAB) { | |
6819 | 4395 _survivor_plab_stats.adjust_desired_plab_sz(no_of_gc_workers); |
4396 _old_plab_stats.adjust_desired_plab_sz(no_of_gc_workers); | |
6595 | 4397 } |
342 | 4398 } |
4399 | |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4400 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
|
4401 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
|
4402 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
|
4403 _retained_old_gc_alloc_region = NULL; |
342 | 4404 } |
4405 | |
4406 void G1CollectedHeap::init_for_evac_failure(OopsInHeapRegionClosure* cl) { | |
4407 _drain_in_progress = false; | |
4408 set_evac_failure_closure(cl); | |
6197 | 4409 _evac_failure_scan_stack = new (ResourceObj::C_HEAP, mtGC) GrowableArray<oop>(40, true); |
342 | 4410 } |
4411 | |
4412 void G1CollectedHeap::finalize_for_evac_failure() { | |
4413 assert(_evac_failure_scan_stack != NULL && | |
4414 _evac_failure_scan_stack->length() == 0, | |
4415 "Postcondition"); | |
4416 assert(!_drain_in_progress, "Postcondition"); | |
1045 | 4417 delete _evac_failure_scan_stack; |
342 | 4418 _evac_failure_scan_stack = NULL; |
4419 } | |
4420 | |
4421 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
|
4422 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
|
4423 |
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4424 double remove_self_forwards_start = os::elapsedTime(); |
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4425 |
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4426 G1ParRemoveSelfForwardPtrsTask rsfp_task(this); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4427 |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4428 if (G1CollectedHeap::use_parallel_gc_threads()) { |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4429 set_par_threads(); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4430 workers()->run_task(&rsfp_task); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4431 set_par_threads(0); |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
4432 } else { |
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4433 rsfp_task.work(0); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4434 } |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4435 |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4436 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
|
4437 |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4438 // 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
|
4439 reset_cset_heap_region_claim_values(); |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4440 |
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4781
diff
changeset
|
4441 assert(check_cset_heap_region_claim_values(HeapRegion::InitialClaimValue), "sanity"); |
342 | 4442 |
4443 // 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
|
4444 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
|
4445 _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
|
4446 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
|
4447 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
|
4448 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
|
4449 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
|
4450 } |
ad747ee9d0b1
8002144: G1: large number of evacuation failures may lead to large c heap memory usage
brutisso
parents:
7455
diff
changeset
|
4451 _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
|
4452 _preserved_marks_of_objs.clear(true); |
17757
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4453 |
eff02b5bd56c
8035654: Add times for evacuation failure handling in "Other" time
tschatzl
parents:
17756
diff
changeset
|
4454 g1_policy()->phase_times()->record_evac_fail_remove_self_forwards((os::elapsedTime() - remove_self_forwards_start) * 1000.0); |
342 | 4455 } |
4456 | |
4457 void G1CollectedHeap::push_on_evac_failure_scan_stack(oop obj) { | |
4458 _evac_failure_scan_stack->push(obj); | |
4459 } | |
4460 | |
4461 void G1CollectedHeap::drain_evac_failure_scan_stack() { | |
4462 assert(_evac_failure_scan_stack != NULL, "precondition"); | |
4463 | |
4464 while (_evac_failure_scan_stack->length() > 0) { | |
4465 oop obj = _evac_failure_scan_stack->pop(); | |
4466 _evac_failure_closure->set_region(heap_region_containing(obj)); | |
4467 obj->oop_iterate_backwards(_evac_failure_closure); | |
4468 } | |
4469 } | |
4470 | |
4471 oop | |
10405 | 4472 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
|
4473 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
|
4474 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
|
4475 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
|
4476 (HeapWord*) old)); |
342 | 4477 markOop m = old->mark(); |
4478 oop forward_ptr = old->forward_to_atomic(old); | |
4479 if (forward_ptr == NULL) { | |
4480 // Forward-to-self succeeded. | |
10405 | 4481 assert(_par_scan_state != NULL, "par scan state"); |
4482 OopsInHeapRegionClosure* cl = _par_scan_state->evac_failure_closure(); | |
4483 uint queue_num = _par_scan_state->queue_num(); | |
4484 | |
4485 _evacuation_failed = true; | |
4486 _evacuation_failed_info_array[queue_num].register_copy_failure(old->size()); | |
342 | 4487 if (_evac_failure_closure != cl) { |
4488 MutexLockerEx x(EvacFailureStack_lock, Mutex::_no_safepoint_check_flag); | |
4489 assert(!_drain_in_progress, | |
4490 "Should only be true while someone holds the lock."); | |
4491 // Set the global evac-failure closure to the current thread's. | |
4492 assert(_evac_failure_closure == NULL, "Or locking has failed."); | |
4493 set_evac_failure_closure(cl); | |
4494 // Now do the common part. | |
4495 handle_evacuation_failure_common(old, m); | |
4496 // Reset to NULL. | |
4497 set_evac_failure_closure(NULL); | |
4498 } else { | |
4499 // The lock is already held, and this is recursive. | |
4500 assert(_drain_in_progress, "This should only be the recursive case."); | |
4501 handle_evacuation_failure_common(old, m); | |
4502 } | |
4503 return old; | |
4504 } 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
|
4505 // 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
|
4506 // 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
|
4507 // 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
|
4508 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
|
4509 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
|
4510 "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
|
4511 (HeapWord*) old, (HeapWord*) forward_ptr)); |
342 | 4512 return forward_ptr; |
4513 } | |
4514 } | |
4515 | |
4516 void G1CollectedHeap::handle_evacuation_failure_common(oop old, markOop m) { | |
4517 preserve_mark_if_necessary(old, m); | |
4518 | |
4519 HeapRegion* r = heap_region_containing(old); | |
4520 if (!r->evacuation_failed()) { | |
4521 r->set_evacuation_failed(true); | |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
4522 _hr_printer.evac_failure(r); |
342 | 4523 } |
4524 | |
4525 push_on_evac_failure_scan_stack(old); | |
4526 | |
4527 if (!_drain_in_progress) { | |
4528 // prevent recursion in copy_to_survivor_space() | |
4529 _drain_in_progress = true; | |
4530 drain_evac_failure_scan_stack(); | |
4531 _drain_in_progress = false; | |
4532 } | |
4533 } | |
4534 | |
4535 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
|
4536 assert(evacuation_failed(), "Oversaving!"); |
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4537 // 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
|
4538 // case of a promotion failure. |
74ee0db180fa
6807801: CMS: could save/restore fewer header words during scavenge
ysr
parents:
2037
diff
changeset
|
4539 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
|
4540 _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
|
4541 _preserved_marks_of_objs.push(m); |
342 | 4542 } |
4543 } | |
4544 | |
4545 HeapWord* G1CollectedHeap::par_allocate_during_gc(GCAllocPurpose purpose, | |
4546 size_t word_size) { | |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4547 if (purpose == GCAllocForSurvived) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4548 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
|
4549 if (result != NULL) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4550 return result; |
342 | 4551 } else { |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4552 // 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
|
4553 // object there. |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4554 return old_attempt_allocation(word_size); |
342 | 4555 } |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4556 } else { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4557 assert(purpose == GCAllocForTenured, "sanity"); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4558 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
|
4559 if (result != NULL) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4560 return result; |
342 | 4561 } else { |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4562 // 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
|
4563 // object there. |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4564 return survivor_attempt_allocation(word_size); |
342 | 4565 } |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4566 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4567 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4568 ShouldNotReachHere(); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
4569 // 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
|
4570 return NULL; |
342 | 4571 } |
4572 | |
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4573 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
|
4574 ParGCAllocBuffer(gclab_word_size), _retired(false) { } |
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4575 |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4576 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
|
4577 : _g1h(g1h), |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4578 _refs(g1h->task_queue(queue_num)), |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4579 _dcq(&g1h->dirty_card_queue_set()), |
12343 | 4580 _ct_bs(g1h->g1_barrier_set()), |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4581 _g1_rem(g1h->g1_rem_set()), |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4582 _hash_seed(17), _queue_num(queue_num), |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4583 _term_attempts(0), |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4584 _surviving_alloc_buffer(g1h->desired_plab_sz(GCAllocForSurvived)), |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4585 _tenured_alloc_buffer(g1h->desired_plab_sz(GCAllocForTenured)), |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4586 _age_table(false), _scanner(g1h, this, rp), |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4587 _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
|
4588 _alloc_buffer_waste(0), _undo_waste(0) { |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4589 // we allocate G1YoungSurvRateNumRegions plus one entries, since |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4590 // 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
|
4591 // non-young regions (where the age is -1) |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4592 // 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
|
4593 // an attempt to eliminate cache contention |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4594 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
|
4595 uint array_length = PADDING_ELEM_NUM + |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4596 real_length + |
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
4597 PADDING_ELEM_NUM; |
6197 | 4598 _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
|
4599 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
|
4600 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
|
4601 "Not enough space for young surv histo."); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4602 _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
|
4603 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
|
4604 |
1391
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4605 _alloc_buffers[GCAllocForSurvived] = &_surviving_alloc_buffer; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4606 _alloc_buffers[GCAllocForTenured] = &_tenured_alloc_buffer; |
79e419e5ea3b
6942253: G1: replace G1ParallelGCAllocBufferSize with YoungPLABSize and OldPLABSize
apetrusenko
parents:
1390
diff
changeset
|
4607 |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4608 _start = os::elapsedTime(); |
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4609 } |
342 | 4610 |
1709 | 4611 void |
4612 G1ParScanThreadState::print_termination_stats_hdr(outputStream* const st) | |
4613 { | |
4614 st->print_raw_cr("GC Termination Stats"); | |
4615 st->print_raw_cr(" elapsed --strong roots-- -------termination-------" | |
4616 " ------waste (KiB)------"); | |
4617 st->print_raw_cr("thr ms ms % ms % attempts" | |
4618 " total alloc undo"); | |
4619 st->print_raw_cr("--- --------- --------- ------ --------- ------ --------" | |
4620 " ------- ------- -------"); | |
4621 } | |
4622 | |
4623 void | |
4624 G1ParScanThreadState::print_termination_stats(int i, | |
4625 outputStream* const st) const | |
4626 { | |
4627 const double elapsed_ms = elapsed_time() * 1000.0; | |
4628 const double s_roots_ms = strong_roots_time() * 1000.0; | |
4629 const double term_ms = term_time() * 1000.0; | |
4630 st->print_cr("%3d %9.2f %9.2f %6.2f " | |
4631 "%9.2f %6.2f " SIZE_FORMAT_W(8) " " | |
4632 SIZE_FORMAT_W(7) " " SIZE_FORMAT_W(7) " " SIZE_FORMAT_W(7), | |
4633 i, elapsed_ms, s_roots_ms, s_roots_ms * 100 / elapsed_ms, | |
4634 term_ms, term_ms * 100 / elapsed_ms, term_attempts(), | |
4635 (alloc_buffer_waste() + undo_waste()) * HeapWordSize / K, | |
4636 alloc_buffer_waste() * HeapWordSize / K, | |
4637 undo_waste() * HeapWordSize / K); | |
4638 } | |
4639 | |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4640 #ifdef ASSERT |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4641 bool G1ParScanThreadState::verify_ref(narrowOop* ref) const { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4642 assert(ref != NULL, "invariant"); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4643 assert(UseCompressedOops, "sanity"); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4644 assert(!has_partial_array_mask(ref), err_msg("ref=" PTR_FORMAT, ref)); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4645 oop p = oopDesc::load_decode_heap_oop(ref); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4646 assert(_g1h->is_in_g1_reserved(p), |
12316
190899198332
7195622: CheckUnhandledOops has limited usefulness now
hseigel
parents:
12233
diff
changeset
|
4647 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, (void *)p)); |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4648 return true; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4649 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4650 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4651 bool G1ParScanThreadState::verify_ref(oop* ref) const { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4652 assert(ref != NULL, "invariant"); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4653 if (has_partial_array_mask(ref)) { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4654 // Must be in the collection set--it's already been copied. |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4655 oop p = clear_partial_array_mask(ref); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4656 assert(_g1h->obj_in_cs(p), |
12316
190899198332
7195622: CheckUnhandledOops has limited usefulness now
hseigel
parents:
12233
diff
changeset
|
4657 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, (void *)p)); |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4658 } else { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4659 oop p = oopDesc::load_decode_heap_oop(ref); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4660 assert(_g1h->is_in_g1_reserved(p), |
12316
190899198332
7195622: CheckUnhandledOops has limited usefulness now
hseigel
parents:
12233
diff
changeset
|
4661 err_msg("ref=" PTR_FORMAT " p=" PTR_FORMAT, ref, (void *)p)); |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4662 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4663 return true; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4664 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4665 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4666 bool G1ParScanThreadState::verify_task(StarTask ref) const { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4667 if (ref.is_narrow()) { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4668 return verify_ref((narrowOop*) ref); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4669 } else { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4670 return verify_ref((oop*) ref); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4671 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4672 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4673 #endif // ASSERT |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4674 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4675 void G1ParScanThreadState::trim_queue() { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4676 assert(_evac_failure_cl != NULL, "not set"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4677 |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4678 StarTask ref; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4679 do { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4680 // Drain the overflow stack first, so other threads can steal. |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4681 while (refs()->pop_overflow(ref)) { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4682 deal_with_reference(ref); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4683 } |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
4684 |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4685 while (refs()->pop_local(ref)) { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4686 deal_with_reference(ref); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4687 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4688 } while (!refs()->is_empty()); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4689 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4690 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4691 G1ParClosureSuper::G1ParClosureSuper(G1CollectedHeap* g1, |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4692 G1ParScanThreadState* par_scan_state) : |
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4693 _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
|
4694 _worker_id(par_scan_state->queue_num()) { } |
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4695 |
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4696 void G1ParCopyHelper::mark_object(oop obj) { |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4697 #ifdef ASSERT |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4698 HeapRegion* hr = _g1->heap_region_containing(obj); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4699 assert(hr != NULL, "sanity"); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4700 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
|
4701 #endif // ASSERT |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4702 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4703 // 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
|
4704 _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
|
4705 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4706 |
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4707 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
|
4708 #ifdef ASSERT |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4709 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
|
4710 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
|
4711 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
|
4712 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4713 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
|
4714 assert(from_hr != NULL, "sanity"); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4715 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
|
4716 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4717 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
|
4718 assert(to_hr != NULL, "sanity"); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4719 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
|
4720 #endif // ASSERT |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4721 |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4722 // 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
|
4723 // 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
|
4724 // 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
|
4725 // image which we know should not be changing. |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4726 _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
|
4727 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4728 |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4729 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
|
4730 size_t word_sz = old->size(); |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4731 HeapRegion* from_region = _g1h->heap_region_containing_raw(old); |
342 | 4732 // +1 to make the -1 indexes valid... |
4733 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
|
4734 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
|
4735 (!from_region->is_young() && young_index == 0), "invariant" ); |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4736 G1CollectorPolicy* g1p = _g1h->g1_policy(); |
342 | 4737 markOop m = old->mark(); |
545 | 4738 int age = m->has_displaced_mark_helper() ? m->displaced_mark_helper()->age() |
4739 : m->age(); | |
4740 GCAllocPurpose alloc_purpose = g1p->evacuation_destination(from_region, age, | |
342 | 4741 word_sz); |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4742 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
|
4743 #ifndef PRODUCT |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4744 // Should this evacuation fail? |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4745 if (_g1h->evacuation_should_fail()) { |
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4746 if (obj_ptr != NULL) { |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4747 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
|
4748 obj_ptr = NULL; |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4749 } |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4750 } |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4751 #endif // !PRODUCT |
342 | 4752 |
4753 if (obj_ptr == NULL) { | |
4754 // This will either forward-to-self, or detect that someone else has | |
4755 // installed a forwarding pointer. | |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4756 return _g1h->handle_evacuation_failure_par(this, old); |
342 | 4757 } |
4758 | |
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4759 oop obj = oop(obj_ptr); |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
4760 |
526 | 4761 // We're going to allocate linearly, so might as well prefetch ahead. |
4762 Prefetch::write(obj_ptr, PrefetchCopyIntervalInBytes); | |
4763 | |
342 | 4764 oop forward_ptr = old->forward_to_atomic(obj); |
4765 if (forward_ptr == NULL) { | |
4766 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
|
4767 |
b7e42ada4898
8036672: G1: alloc_purpose in copy_to_survivor_space() used incorrectly
pliden
parents:
17748
diff
changeset
|
4768 // 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
|
4769 // 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
|
4770 HeapRegion* to_region = _g1h->heap_region_containing_raw(obj_ptr); |
b7e42ada4898
8036672: G1: alloc_purpose in copy_to_survivor_space() used incorrectly
pliden
parents:
17748
diff
changeset
|
4771 alloc_purpose = to_region->is_young() ? GCAllocForSurvived : GCAllocForTenured; |
b7e42ada4898
8036672: G1: alloc_purpose in copy_to_survivor_space() used incorrectly
pliden
parents:
17748
diff
changeset
|
4772 |
526 | 4773 if (g1p->track_object_age(alloc_purpose)) { |
4774 // We could simply do obj->incr_age(). However, this causes a | |
4775 // performance issue. obj->incr_age() will first check whether | |
4776 // the object has a displaced mark by checking its mark word; | |
4777 // getting the mark word from the new location of the object | |
4778 // stalls. So, given that we already have the mark word and we | |
4779 // are about to install it anyway, it's better to increase the | |
4780 // age on the mark word, when the object does not have a | |
4781 // displaced mark word. We're not expecting many objects to have | |
4782 // a displaced marked word, so that case is not optimized | |
4783 // further (it could be...) and we simply call obj->incr_age(). | |
4784 | |
4785 if (m->has_displaced_mark_helper()) { | |
4786 // in this case, we have to install the mark word first, | |
4787 // otherwise obj looks to be forwarded (the old mark word, | |
4788 // which contains the forward pointer, was copied) | |
4789 obj->set_mark(m); | |
4790 obj->incr_age(); | |
4791 } else { | |
4792 m = m->incr_age(); | |
545 | 4793 obj->set_mark(m); |
526 | 4794 } |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4795 age_table()->add(obj, word_sz); |
545 | 4796 } else { |
4797 obj->set_mark(m); | |
526 | 4798 } |
4799 | |
17764 | 4800 if (G1StringDedup::is_enabled()) { |
4801 G1StringDedup::enqueue_from_evacuation(from_region->is_young(), | |
4802 to_region->is_young(), | |
4803 queue_num(), | |
4804 obj); | |
4805 } | |
4806 | |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4807 size_t* surv_young_words = surviving_young_words(); |
342 | 4808 surv_young_words[young_index] += word_sz; |
4809 | |
4810 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
|
4811 // 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
|
4812 // 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
|
4813 // 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
|
4814 arrayOop(obj)->set_length(0); |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4815 oop* old_p = set_partial_array_mask(old); |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4816 push_on_queue(old_p); |
342 | 4817 } else { |
526 | 4818 // No point in using the slower heap_region_containing() method, |
4819 // 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
|
4820 _scanner.set_region(_g1h->heap_region_containing_raw(obj)); |
5987 | 4821 obj->oop_iterate_backwards(&_scanner); |
342 | 4822 } |
4823 } else { | |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4824 undo_allocation(alloc_purpose, obj_ptr, word_sz); |
342 | 4825 obj = forward_ptr; |
4826 } | |
4827 return obj; | |
4828 } | |
4829 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4830 template <class T> |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4831 void G1ParCopyHelper::do_klass_barrier(T* p, oop new_obj) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4832 if (_g1->heap_region_containing_raw(new_obj)->is_young()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4833 _scanned_klass->record_modified_oops(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4834 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4835 } |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4836 |
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4837 template <G1Barrier barrier, bool do_mark_object> |
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
838
diff
changeset
|
4838 template <class T> |
17687
86b64209f715
8027559: Decrease code size and templatizing in G1ParCopyClosure::do_oop_work
tschatzl
parents:
17652
diff
changeset
|
4839 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
|
4840 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
|
4841 |
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4842 if (oopDesc::is_null(heap_oop)) { |
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4843 return; |
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4844 } |
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4845 |
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4846 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
|
4847 |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4848 assert(_worker_id == _par_scan_state->queue_num(), "sanity"); |
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4849 |
1261
0414c1049f15
6923991: G1: improve scalability of RSet scanning
iveresov
parents:
1245
diff
changeset
|
4850 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
|
4851 oop forwardee; |
526 | 4852 if (obj->is_forwarded()) { |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4853 forwardee = obj->forwardee(); |
526 | 4854 } else { |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
4855 forwardee = _par_scan_state->copy_to_survivor_space(obj); |
342 | 4856 } |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4857 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
|
4858 oopDesc::encode_store_heap_oop(p, forwardee); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4859 if (do_mark_object && forwardee != obj) { |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4860 // 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
|
4861 // 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
|
4862 mark_forwarded_object(obj, forwardee); |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4863 } |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4864 |
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4865 if (barrier == G1BarrierKlass) { |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4866 do_klass_barrier(p, forwardee); |
342 | 4867 } |
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4868 } else { |
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4869 // 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
|
4870 // 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
|
4871 // 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
|
4872 if (do_mark_object) { |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
4873 mark_object(obj); |
3886
eeae91c9baba
7080389: G1: refactor marking code in evacuation pause copy closures
johnc
parents:
3869
diff
changeset
|
4874 } |
526 | 4875 } |
4876 | |
17688
2c2ae9e5f65d
8035326: Assume non-NULL references in G1CollectedHeap::in_cset_fast_test
tschatzl
parents:
17687
diff
changeset
|
4877 if (barrier == G1BarrierEvac) { |
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4834
diff
changeset
|
4878 _par_scan_state->update_rs(_from, p, _worker_id); |
526 | 4879 } |
17636
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4880 } |
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4881 |
889068b9a088
8027746: Remove do_gen_barrier template parameter in G1ParCopyClosure
tschatzl
parents:
17634
diff
changeset
|
4882 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
|
4883 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
|
4884 |
342 | 4885 class G1ParEvacuateFollowersClosure : public VoidClosure { |
4886 protected: | |
4887 G1CollectedHeap* _g1h; | |
4888 G1ParScanThreadState* _par_scan_state; | |
4889 RefToScanQueueSet* _queues; | |
4890 ParallelTaskTerminator* _terminator; | |
4891 | |
4892 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } | |
4893 RefToScanQueueSet* queues() { return _queues; } | |
4894 ParallelTaskTerminator* terminator() { return _terminator; } | |
4895 | |
4896 public: | |
4897 G1ParEvacuateFollowersClosure(G1CollectedHeap* g1h, | |
4898 G1ParScanThreadState* par_scan_state, | |
4899 RefToScanQueueSet* queues, | |
4900 ParallelTaskTerminator* terminator) | |
4901 : _g1h(g1h), _par_scan_state(par_scan_state), | |
4902 _queues(queues), _terminator(terminator) {} | |
4903 | |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4904 void do_void(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4905 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4906 private: |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4907 inline bool offer_termination(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4908 }; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4909 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4910 bool G1ParEvacuateFollowersClosure::offer_termination() { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4911 G1ParScanThreadState* const pss = par_scan_state(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4912 pss->start_term_time(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4913 const bool res = terminator()->offer_termination(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4914 pss->end_term_time(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4915 return res; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4916 } |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4917 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4918 void G1ParEvacuateFollowersClosure::do_void() { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4919 StarTask stolen_task; |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4920 G1ParScanThreadState* const pss = par_scan_state(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4921 pss->trim_queue(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4922 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4923 do { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4924 while (queues()->steal(pss->queue_num(), pss->hash_seed(), stolen_task)) { |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4925 assert(pss->verify_task(stolen_task), "sanity"); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4926 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
|
4927 pss->deal_with_reference((narrowOop*) stolen_task); |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4928 } else { |
1883
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
1862
diff
changeset
|
4929 pss->deal_with_reference((oop*) stolen_task); |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4930 } |
1883
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
1862
diff
changeset
|
4931 |
35e4e086d5f5
6990359: G1: don't push a stolen entry on the taskqueue, deal with it directly
tonyp
parents:
1862
diff
changeset
|
4932 // 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
|
4933 // 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
|
4934 // we drain the queues as necessary. |
342 | 4935 pss->trim_queue(); |
4936 } | |
1862
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4937 } while (!offer_termination()); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4938 |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4939 pss->retire_alloc_buffers(); |
b14ec34b1e07
6989448: G1: refactor and simplify G1ParScanThreadState
jcoomes
parents:
1861
diff
changeset
|
4940 } |
342 | 4941 |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4942 class G1KlassScanClosure : public KlassClosure { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4943 G1ParCopyHelper* _closure; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4944 bool _process_only_dirty; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4945 int _count; |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4946 public: |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4947 G1KlassScanClosure(G1ParCopyHelper* closure, bool process_only_dirty) |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4948 : _process_only_dirty(process_only_dirty), _closure(closure), _count(0) {} |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4949 void do_klass(Klass* klass) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4950 // If the klass has not been dirtied we know that there's |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4951 // no references into the young gen and we can skip it. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4952 if (!_process_only_dirty || klass->has_modified_oops()) { |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4953 // Clean the klass since we're going to scavenge all the metadata. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4954 klass->clear_modified_oops(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4955 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4956 // Tell the closure that this klass is the Klass to scavenge |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4957 // and is the one to dirty if oops are left pointing into the young gen. |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4958 _closure->set_scanned_klass(klass); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4959 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4960 klass->oops_do(_closure); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4961 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4962 _closure->set_scanned_klass(NULL); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
4963 } |
da91efe96a93
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4964 _count++; |
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|
4965 } |
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|
4966 }; |
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|
4967 |
342 | 4968 class G1ParTask : public AbstractGangTask { |
4969 protected: | |
4970 G1CollectedHeap* _g1h; | |
4971 RefToScanQueueSet *_queues; | |
4972 ParallelTaskTerminator _terminator; | |
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4973 uint _n_workers; |
342 | 4974 |
4975 Mutex _stats_lock; | |
4976 Mutex* stats_lock() { return &_stats_lock; } | |
4977 | |
4978 size_t getNCards() { | |
4979 return (_g1h->capacity() + G1BlockOffsetSharedArray::N_bytes - 1) | |
4980 / G1BlockOffsetSharedArray::N_bytes; | |
4981 } | |
4982 | |
4983 public: | |
4095
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4984 G1ParTask(G1CollectedHeap* g1h, |
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4985 RefToScanQueueSet *task_queues) |
342 | 4986 : AbstractGangTask("G1 collection"), |
4987 _g1h(g1h), | |
4988 _queues(task_queues), | |
4095
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|
4989 _terminator(0, _queues), |
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4990 _stats_lock(Mutex::leaf, "parallel G1 stats lock", true) |
342 | 4991 {} |
4992 | |
4993 RefToScanQueueSet* queues() { return _queues; } | |
4994 | |
4995 RefToScanQueue *work_queue(int i) { | |
4996 return queues()->queue(i); | |
4997 } | |
4998 | |
4095
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|
4999 ParallelTaskTerminator* terminator() { return &_terminator; } |
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|
5000 |
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|
5001 virtual void set_for_termination(int active_workers) { |
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5002 // This task calls set_n_termination() in par_non_clean_card_iterate_work() |
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5003 // in the young space (_par_seq_tasks) in the G1 heap |
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5004 // for SequentialSubTasksDone. |
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5005 // This task also uses SubTasksDone in SharedHeap and G1CollectedHeap |
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5006 // both of which need setting by set_n_termination(). |
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|
5007 _g1h->SharedHeap::set_n_termination(active_workers); |
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5008 _g1h->set_n_termination(active_workers); |
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5009 terminator()->reset_for_reuse(active_workers); |
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5010 _n_workers = active_workers; |
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|
5011 } |
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|
5012 |
4728
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|
5013 void work(uint worker_id) { |
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|
5014 if (worker_id >= _n_workers) return; // no work needed this round |
1611 | 5015 |
5016 double start_time_ms = os::elapsedTime() * 1000.0; | |
6219
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5017 _g1h->g1_policy()->phase_times()->record_gc_worker_start_time(worker_id, start_time_ms); |
1611 | 5018 |
5986
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|
5019 { |
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|
5020 ResourceMark rm; |
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|
5021 HandleMark hm; |
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|
5022 |
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|
5023 ReferenceProcessor* rp = _g1h->ref_processor_stw(); |
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|
5024 |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
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|
5025 G1ParScanThreadState pss(_g1h, worker_id, rp); |
5986
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|
5026 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, rp); |
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
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|
5027 |
5986
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|
5028 pss.set_evac_failure_closure(&evac_failure_cl); |
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|
5029 |
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|
5030 G1ParScanExtRootClosure only_scan_root_cl(_g1h, &pss, rp); |
6725
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5031 G1ParScanMetadataClosure only_scan_metadata_cl(_g1h, &pss, rp); |
5986
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|
5032 |
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|
5033 G1ParScanAndMarkExtRootClosure scan_mark_root_cl(_g1h, &pss, rp); |
6725
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5034 G1ParScanAndMarkMetadataClosure scan_mark_metadata_cl(_g1h, &pss, rp); |
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5035 |
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5036 bool only_young = _g1h->g1_policy()->gcs_are_young(); |
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5037 G1KlassScanClosure scan_mark_klasses_cl_s(&scan_mark_metadata_cl, false); |
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|
5038 G1KlassScanClosure only_scan_klasses_cl_s(&only_scan_metadata_cl, only_young); |
5986
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|
5039 |
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|
5040 OopClosure* scan_root_cl = &only_scan_root_cl; |
6725
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5041 G1KlassScanClosure* scan_klasses_cl = &only_scan_klasses_cl_s; |
5986
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|
5042 |
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|
5043 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
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|
5044 // We also need to mark copied objects. |
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|
5045 scan_root_cl = &scan_mark_root_cl; |
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5046 scan_klasses_cl = &scan_mark_klasses_cl_s; |
5986
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|
5047 } |
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|
5048 |
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|
5049 G1ParPushHeapRSClosure push_heap_rs_cl(_g1h, &pss); |
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|
5050 |
12080 | 5051 // Don't scan the scavengable methods in the code cache as part |
5052 // of strong root scanning. The code roots that point into a | |
5053 // region in the collection set are scanned when we scan the | |
5054 // region's RSet. | |
5055 int so = SharedHeap::SO_AllClasses | SharedHeap::SO_Strings; | |
6725
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|
5056 |
5986
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|
5057 pss.start_strong_roots(); |
6725
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|
5058 _g1h->g1_process_strong_roots(/* is scavenging */ true, |
da91efe96a93
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|
5059 SharedHeap::ScanningOption(so), |
5986
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diff
changeset
|
5060 scan_root_cl, |
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|
5061 &push_heap_rs_cl, |
6725
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|
5062 scan_klasses_cl, |
5986
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diff
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|
5063 worker_id); |
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diff
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|
5064 pss.end_strong_roots(); |
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|
5065 |
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|
5066 { |
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|
5067 double start = os::elapsedTime(); |
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|
5068 G1ParEvacuateFollowersClosure evac(_g1h, &pss, _queues, &_terminator); |
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diff
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|
5069 evac.do_void(); |
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|
5070 double elapsed_ms = (os::elapsedTime()-start)*1000.0; |
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diff
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|
5071 double term_ms = pss.term_time()*1000.0; |
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
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6611
diff
changeset
|
5072 _g1h->g1_policy()->phase_times()->add_obj_copy_time(worker_id, elapsed_ms-term_ms); |
6219
922993931b3d
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|
5073 _g1h->g1_policy()->phase_times()->record_termination(worker_id, term_ms, pss.term_attempts()); |
5986
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|
5074 } |
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|
5075 _g1h->g1_policy()->record_thread_age_table(pss.age_table()); |
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|
5076 _g1h->update_surviving_young_words(pss.surviving_young_words()+1); |
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|
5077 |
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|
5078 if (ParallelGCVerbose) { |
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|
5079 MutexLocker x(stats_lock()); |
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|
5080 pss.print_termination_stats(worker_id); |
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|
5081 } |
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diff
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|
5082 |
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|
5083 assert(pss.refs()->is_empty(), "should be empty"); |
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|
5084 |
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|
5085 // Close the inner scope so that the ResourceMark and HandleMark |
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|
5086 // destructors are executed here and are included as part of the |
500023bd0818
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|
5087 // "GC Worker Time". |
342 | 5088 } |
5089 | |
1611 | 5090 double end_time_ms = os::elapsedTime() * 1000.0; |
6219
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brutisso
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|
5091 _g1h->g1_policy()->phase_times()->record_gc_worker_end_time(worker_id, end_time_ms); |
342 | 5092 } |
5093 }; | |
5094 | |
5095 // *** Common G1 Evacuation Stuff | |
5096 | |
1833
8b10f48633dc
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1755
diff
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|
5097 // This method is run in a GC worker. |
8b10f48633dc
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|
5098 |
342 | 5099 void |
5100 G1CollectedHeap:: | |
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|
5101 g1_process_strong_roots(bool is_scavenging, |
4910
caa4652b4414
7129892: G1: explicit marking cycle initiation might fail to initiate a marking cycle
tonyp
parents:
4875
diff
changeset
|
5102 ScanningOption so, |
342 | 5103 OopClosure* scan_non_heap_roots, |
5104 OopsInHeapRegionClosure* scan_rs, | |
6725
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|
5105 G1KlassScanClosure* scan_klasses, |
17844
8847586c9037
8016302: Change type of the number of GC workers to unsigned int (2)
vkempik
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17833
diff
changeset
|
5106 uint worker_i) { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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3973
diff
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|
5107 |
6725
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|
5108 // First scan the strong roots |
342 | 5109 double ext_roots_start = os::elapsedTime(); |
5110 double closure_app_time_sec = 0.0; | |
5111 | |
5112 BufferingOopClosure buf_scan_non_heap_roots(scan_non_heap_roots); | |
5113 | |
12080 | 5114 assert(so & SO_CodeCache || scan_rs != NULL, "must scan code roots somehow"); |
5115 // Walk the code cache/strong code roots w/o buffering, because StarTask | |
5116 // cannot handle unaligned oop locations. | |
5117 CodeBlobToOopClosure eager_scan_code_roots(scan_non_heap_roots, true /* do_marking */); | |
989
148e5441d916
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|
5118 |
148e5441d916
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890
diff
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|
5119 process_strong_roots(false, // no scoping; this is parallel code |
6725
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|
5120 is_scavenging, so, |
342 | 5121 &buf_scan_non_heap_roots, |
989
148e5441d916
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890
diff
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|
5122 &eager_scan_code_roots, |
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|
5123 scan_klasses |
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changeset
|
5124 ); |
1394
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
johnc
parents:
1391
diff
changeset
|
5125 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5126 // Now the CM ref_processor roots. |
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
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diff
changeset
|
5127 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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diff
changeset
|
5128 // We need to treat the discovered reference lists of the |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5129 // concurrent mark ref processor as roots and keep entries |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5130 // (which are added by the marking threads) on them live |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5131 // until they can be processed at the end of marking. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5132 ref_processor_cm()->weak_oops_do(&buf_scan_non_heap_roots); |
3823
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
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diff
changeset
|
5133 } |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
3778
diff
changeset
|
5134 |
14a2fd14c0db
7068240: G1: Long "parallel other time" and "ext root scanning" when running specific benchmark
johnc
parents:
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diff
changeset
|
5135 // Finish up any enqueued closure apps (attributed as object copy time). |
342 | 5136 buf_scan_non_heap_roots.done(); |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
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|
5137 |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
5138 double obj_copy_time_sec = buf_scan_non_heap_roots.closure_app_seconds(); |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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diff
changeset
|
5139 |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
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6188
diff
changeset
|
5140 g1_policy()->phase_times()->record_obj_copy_time(worker_i, obj_copy_time_sec * 1000.0); |
3823
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diff
changeset
|
5141 |
342 | 5142 double ext_root_time_ms = |
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
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diff
changeset
|
5143 ((os::elapsedTime() - ext_roots_start) - obj_copy_time_sec) * 1000.0; |
3823
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diff
changeset
|
5144 |
6219
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7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
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diff
changeset
|
5145 g1_policy()->phase_times()->record_ext_root_scan_time(worker_i, ext_root_time_ms); |
342 | 5146 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
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diff
changeset
|
5147 // During conc marking we have to filter the per-thread SATB buffers |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
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diff
changeset
|
5148 // to make sure we remove any oops into the CSet (which will show up |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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diff
changeset
|
5149 // as implicitly live). |
6628
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brutisso
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changeset
|
5150 double satb_filtering_ms = 0.0; |
4787
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6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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diff
changeset
|
5151 if (!_process_strong_tasks->is_task_claimed(G1H_PS_filter_satb_buffers)) { |
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
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diff
changeset
|
5152 if (mark_in_progress()) { |
6628
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brutisso
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changeset
|
5153 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
|
5154 |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
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diff
changeset
|
5155 JavaThread::satb_mark_queue_set().filter_thread_buffers(); |
6628
bb3f6194fedb
7178363: G1: Remove the serial code for PrintGCDetails and make it a special case of the parallel code
brutisso
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diff
changeset
|
5156 |
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
|
5157 satb_filtering_ms = (os::elapsedTime() - satb_filter_start) * 1000.0; |
4787
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6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
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diff
changeset
|
5158 } |
2ace1c4ee8da
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parents:
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diff
changeset
|
5159 } |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
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diff
changeset
|
5160 g1_policy()->phase_times()->record_satb_filtering_time(worker_i, satb_filtering_ms); |
342 | 5161 |
12080 | 5162 // If this is an initial mark pause, and we're not scanning |
5163 // the entire code cache, we need to mark the oops in the | |
5164 // strong code root lists for the regions that are not in | |
5165 // the collection set. | |
5166 // Note all threads participate in this set of root tasks. | |
5167 double mark_strong_code_roots_ms = 0.0; | |
5168 if (g1_policy()->during_initial_mark_pause() && !(so & SO_CodeCache)) { | |
5169 double mark_strong_roots_start = os::elapsedTime(); | |
5170 mark_strong_code_roots(worker_i); | |
5171 mark_strong_code_roots_ms = (os::elapsedTime() - mark_strong_roots_start) * 1000.0; | |
5172 } | |
5173 g1_policy()->phase_times()->record_strong_code_root_mark_time(worker_i, mark_strong_code_roots_ms); | |
5174 | |
342 | 5175 // Now scan the complement of the collection set. |
5176 if (scan_rs != NULL) { | |
12080 | 5177 g1_rem_set()->oops_into_collection_set_do(scan_rs, &eager_scan_code_roots, worker_i); |
342 | 5178 } |
5179 _process_strong_tasks->all_tasks_completed(); | |
5180 } | |
5181 | |
5182 void | |
10179
a08c80e9e1e5
8012687: Remove unused is_root checks and closures
stefank
parents:
10099
diff
changeset
|
5183 G1CollectedHeap::g1_process_weak_roots(OopClosure* root_closure) { |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5184 CodeBlobToOopClosure roots_in_blobs(root_closure, /*do_marking=*/ false); |
10179
a08c80e9e1e5
8012687: Remove unused is_root checks and closures
stefank
parents:
10099
diff
changeset
|
5185 SharedHeap::process_weak_roots(root_closure, &roots_in_blobs); |
342 | 5186 } |
5187 | |
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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diff
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|
5188 class G1StringSymbolTableUnlinkTask : public AbstractGangTask { |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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changeset
|
5189 private: |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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diff
changeset
|
5190 BoolObjectClosure* _is_alive; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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diff
changeset
|
5191 int _initial_string_table_size; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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diff
changeset
|
5192 int _initial_symbol_table_size; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
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diff
changeset
|
5193 |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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diff
changeset
|
5194 bool _process_strings; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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diff
changeset
|
5195 int _strings_processed; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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parents:
13400
diff
changeset
|
5196 int _strings_removed; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5197 |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5198 bool _process_symbols; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5199 int _symbols_processed; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5200 int _symbols_removed; |
17652
0eb64cfc0b76
8033443: Test8000311 fails after latest changes to parallelize string and symbol table unlink
tschatzl
parents:
17651
diff
changeset
|
5201 |
0eb64cfc0b76
8033443: Test8000311 fails after latest changes to parallelize string and symbol table unlink
tschatzl
parents:
17651
diff
changeset
|
5202 bool _do_in_parallel; |
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
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diff
changeset
|
5203 public: |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5204 G1StringSymbolTableUnlinkTask(BoolObjectClosure* is_alive, bool process_strings, bool process_symbols) : |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5205 AbstractGangTask("Par String/Symbol table unlink"), _is_alive(is_alive), |
17652
0eb64cfc0b76
8033443: Test8000311 fails after latest changes to parallelize string and symbol table unlink
tschatzl
parents:
17651
diff
changeset
|
5206 _do_in_parallel(G1CollectedHeap::use_parallel_gc_threads()), |
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5207 _process_strings(process_strings), _strings_processed(0), _strings_removed(0), |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5208 _process_symbols(process_symbols), _symbols_processed(0), _symbols_removed(0) { |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5209 |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5210 _initial_string_table_size = StringTable::the_table()->table_size(); |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5211 _initial_symbol_table_size = SymbolTable::the_table()->table_size(); |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5212 if (process_strings) { |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5213 StringTable::clear_parallel_claimed_index(); |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5214 } |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5215 if (process_symbols) { |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5216 SymbolTable::clear_parallel_claimed_index(); |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5217 } |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5218 } |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5219 |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5220 ~G1StringSymbolTableUnlinkTask() { |
17652
0eb64cfc0b76
8033443: Test8000311 fails after latest changes to parallelize string and symbol table unlink
tschatzl
parents:
17651
diff
changeset
|
5221 guarantee(!_process_strings || !_do_in_parallel || StringTable::parallel_claimed_index() >= _initial_string_table_size, |
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5222 err_msg("claim value "INT32_FORMAT" after unlink less than initial string table size "INT32_FORMAT, |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5223 StringTable::parallel_claimed_index(), _initial_string_table_size)); |
17652
0eb64cfc0b76
8033443: Test8000311 fails after latest changes to parallelize string and symbol table unlink
tschatzl
parents:
17651
diff
changeset
|
5224 guarantee(!_process_symbols || !_do_in_parallel || SymbolTable::parallel_claimed_index() >= _initial_symbol_table_size, |
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5225 err_msg("claim value "INT32_FORMAT" after unlink less than initial symbol table size "INT32_FORMAT, |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5226 SymbolTable::parallel_claimed_index(), _initial_symbol_table_size)); |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5227 } |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5228 |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5229 void work(uint worker_id) { |
17652
0eb64cfc0b76
8033443: Test8000311 fails after latest changes to parallelize string and symbol table unlink
tschatzl
parents:
17651
diff
changeset
|
5230 if (_do_in_parallel) { |
17634
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5231 int strings_processed = 0; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5232 int strings_removed = 0; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5233 int symbols_processed = 0; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5234 int symbols_removed = 0; |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5235 if (_process_strings) { |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
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diff
changeset
|
5236 StringTable::possibly_parallel_unlink(_is_alive, &strings_processed, &strings_removed); |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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diff
changeset
|
5237 Atomic::add(strings_processed, &_strings_processed); |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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diff
changeset
|
5238 Atomic::add(strings_removed, &_strings_removed); |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5239 } |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
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diff
changeset
|
5240 if (_process_symbols) { |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5241 SymbolTable::possibly_parallel_unlink(&symbols_processed, &symbols_removed); |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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diff
changeset
|
5242 Atomic::add(symbols_processed, &_symbols_processed); |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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diff
changeset
|
5243 Atomic::add(symbols_removed, &_symbols_removed); |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
5244 } |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
5245 } else { |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
parents:
13400
diff
changeset
|
5246 if (_process_strings) { |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
5247 StringTable::unlink(_is_alive, &_strings_processed, &_strings_removed); |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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diff
changeset
|
5248 } |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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13400
diff
changeset
|
5249 if (_process_symbols) { |
5a32d2a3cc1e
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tschatzl
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13400
diff
changeset
|
5250 SymbolTable::unlink(&_symbols_processed, &_symbols_removed); |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
tschatzl
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diff
changeset
|
5251 } |
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diff
changeset
|
5252 } |
5a32d2a3cc1e
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diff
changeset
|
5253 } |
5a32d2a3cc1e
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diff
changeset
|
5254 |
5a32d2a3cc1e
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diff
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|
5255 size_t strings_processed() const { return (size_t)_strings_processed; } |
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diff
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|
5256 size_t strings_removed() const { return (size_t)_strings_removed; } |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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diff
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|
5257 |
5a32d2a3cc1e
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diff
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|
5258 size_t symbols_processed() const { return (size_t)_symbols_processed; } |
5a32d2a3cc1e
8027476: Improve performance of Stringtable unlink
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diff
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|
5259 size_t symbols_removed() const { return (size_t)_symbols_removed; } |
5a32d2a3cc1e
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diff
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|
5260 }; |
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diff
changeset
|
5261 |
5a32d2a3cc1e
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tschatzl
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diff
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|
5262 void G1CollectedHeap::unlink_string_and_symbol_table(BoolObjectClosure* is_alive, |
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8027476: Improve performance of Stringtable unlink
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|
5263 bool process_strings, bool process_symbols) { |
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|
5264 uint n_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
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|
5265 _g1h->workers()->active_workers() : 1); |
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|
5266 |
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|
5267 G1StringSymbolTableUnlinkTask g1_unlink_task(is_alive, process_strings, process_symbols); |
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|
5268 if (G1CollectedHeap::use_parallel_gc_threads()) { |
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|
5269 set_par_threads(n_workers); |
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changeset
|
5270 workers()->run_task(&g1_unlink_task); |
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|
5271 set_par_threads(0); |
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|
5272 } else { |
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|
5273 g1_unlink_task.work(0); |
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|
5274 } |
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|
5275 if (G1TraceStringSymbolTableScrubbing) { |
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|
5276 gclog_or_tty->print_cr("Cleaned string and symbol table, " |
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|
5277 "strings: "SIZE_FORMAT" processed, "SIZE_FORMAT" removed, " |
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|
5278 "symbols: "SIZE_FORMAT" processed, "SIZE_FORMAT" removed", |
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|
5279 g1_unlink_task.strings_processed(), g1_unlink_task.strings_removed(), |
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|
5280 g1_unlink_task.symbols_processed(), g1_unlink_task.symbols_removed()); |
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|
5281 } |
17764 | 5282 |
5283 if (G1StringDedup::is_enabled()) { | |
5284 G1StringDedup::unlink(is_alive); | |
5285 } | |
17634
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|
5286 } |
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|
5287 |
17756
a07bea31ef35
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changeset
|
5288 class RedirtyLoggedCardTableEntryFastClosure : public CardTableEntryClosure { |
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|
5289 public: |
17844
8847586c9037
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|
5290 bool do_card_ptr(jbyte* card_ptr, uint worker_i) { |
17756
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5291 *card_ptr = CardTableModRefBS::dirty_card_val(); |
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5292 return true; |
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|
5293 } |
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|
5294 }; |
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|
5295 |
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|
5296 void G1CollectedHeap::redirty_logged_cards() { |
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|
5297 guarantee(G1DeferredRSUpdate, "Must only be called when using deferred RS updates."); |
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5298 double redirty_logged_cards_start = os::elapsedTime(); |
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|
5299 |
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|
5300 RedirtyLoggedCardTableEntryFastClosure redirty; |
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|
5301 dirty_card_queue_set().set_closure(&redirty); |
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|
5302 dirty_card_queue_set().apply_closure_to_all_completed_buffers(); |
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|
5303 |
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changeset
|
5304 DirtyCardQueueSet& dcq = JavaThread::dirty_card_queue_set(); |
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|
5305 dcq.merge_bufferlists(&dirty_card_queue_set()); |
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|
5306 assert(dirty_card_queue_set().completed_buffers_num() == 0, "All should be consumed"); |
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|
5307 |
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changeset
|
5308 g1_policy()->phase_times()->record_redirty_logged_cards_time_ms((os::elapsedTime() - redirty_logged_cards_start) * 1000.0); |
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|
5309 } |
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|
5310 |
3979
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|
5311 // Weak Reference Processing support |
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|
5312 |
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|
5313 // An always "is_alive" closure that is used to preserve referents. |
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|
5314 // If the object is non-null then it's alive. Used in the preservation |
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diff
changeset
|
5315 // of referent objects that are pointed to by reference objects |
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diff
changeset
|
5316 // discovered by the CM ref processor. |
4dfb2df418f2
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|
5317 class G1AlwaysAliveClosure: public BoolObjectClosure { |
4dfb2df418f2
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diff
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|
5318 G1CollectedHeap* _g1; |
4dfb2df418f2
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diff
changeset
|
5319 public: |
4dfb2df418f2
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diff
changeset
|
5320 G1AlwaysAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
4dfb2df418f2
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diff
changeset
|
5321 bool do_object_b(oop p) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5322 if (p != NULL) { |
4dfb2df418f2
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parents:
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diff
changeset
|
5323 return true; |
4dfb2df418f2
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parents:
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diff
changeset
|
5324 } |
4dfb2df418f2
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diff
changeset
|
5325 return false; |
4dfb2df418f2
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parents:
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diff
changeset
|
5326 } |
4dfb2df418f2
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diff
changeset
|
5327 }; |
4dfb2df418f2
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diff
changeset
|
5328 |
4dfb2df418f2
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diff
changeset
|
5329 bool G1STWIsAliveClosure::do_object_b(oop p) { |
4dfb2df418f2
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diff
changeset
|
5330 // An object is reachable if it is outside the collection set, |
4dfb2df418f2
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parents:
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diff
changeset
|
5331 // or is inside and copied. |
4dfb2df418f2
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diff
changeset
|
5332 return !_g1->obj_in_cs(p) || p->is_forwarded(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5333 } |
4dfb2df418f2
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parents:
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diff
changeset
|
5334 |
4dfb2df418f2
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parents:
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diff
changeset
|
5335 // Non Copying Keep Alive closure |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5336 class G1KeepAliveClosure: public OopClosure { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5337 G1CollectedHeap* _g1; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5338 public: |
4dfb2df418f2
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parents:
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diff
changeset
|
5339 G1KeepAliveClosure(G1CollectedHeap* g1) : _g1(g1) {} |
4dfb2df418f2
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parents:
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diff
changeset
|
5340 void do_oop(narrowOop* p) { guarantee(false, "Not needed"); } |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5341 void do_oop( oop* p) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5342 oop obj = *p; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5343 |
4dfb2df418f2
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diff
changeset
|
5344 if (_g1->obj_in_cs(obj)) { |
4dfb2df418f2
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parents:
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diff
changeset
|
5345 assert( obj->is_forwarded(), "invariant" ); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5346 *p = obj->forwardee(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5347 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5348 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5349 }; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5350 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5351 // Copying Keep Alive closure - can be called from both |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5352 // serial and parallel code as long as different worker |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5353 // threads utilize different G1ParScanThreadState instances |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5354 // and different queues. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5355 |
4dfb2df418f2
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diff
changeset
|
5356 class G1CopyingKeepAliveClosure: public OopClosure { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5357 G1CollectedHeap* _g1h; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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diff
changeset
|
5358 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
|
5359 OopsInHeapRegionClosure* _copy_metadata_obj_cl; |
3979
4dfb2df418f2
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parents:
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diff
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|
5360 G1ParScanThreadState* _par_scan_state; |
4dfb2df418f2
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diff
changeset
|
5361 |
4dfb2df418f2
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diff
changeset
|
5362 public: |
4dfb2df418f2
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diff
changeset
|
5363 G1CopyingKeepAliveClosure(G1CollectedHeap* g1h, |
4dfb2df418f2
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diff
changeset
|
5364 OopClosure* non_heap_obj_cl, |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5365 OopsInHeapRegionClosure* metadata_obj_cl, |
3979
4dfb2df418f2
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parents:
3973
diff
changeset
|
5366 G1ParScanThreadState* pss): |
4dfb2df418f2
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parents:
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diff
changeset
|
5367 _g1h(g1h), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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3973
diff
changeset
|
5368 _copy_non_heap_obj_cl(non_heap_obj_cl), |
6725
da91efe96a93
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coleenp
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6629
diff
changeset
|
5369 _copy_metadata_obj_cl(metadata_obj_cl), |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5370 _par_scan_state(pss) |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5371 {} |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
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diff
changeset
|
5372 |
4dfb2df418f2
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diff
changeset
|
5373 virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
4dfb2df418f2
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diff
changeset
|
5374 virtual void do_oop( oop* p) { do_oop_work(p); } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5375 |
4dfb2df418f2
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diff
changeset
|
5376 template <class T> void do_oop_work(T* p) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5377 oop obj = oopDesc::load_decode_heap_oop(p); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5378 |
4dfb2df418f2
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diff
changeset
|
5379 if (_g1h->obj_in_cs(obj)) { |
4dfb2df418f2
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diff
changeset
|
5380 // If the referent object has been forwarded (either copied |
4dfb2df418f2
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3973
diff
changeset
|
5381 // to a new location or to itself in the event of an |
4dfb2df418f2
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diff
changeset
|
5382 // evacuation failure) then we need to update the reference |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5383 // field and, if both reference and referent are in the G1 |
4dfb2df418f2
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parents:
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diff
changeset
|
5384 // heap, update the RSet for the referent. |
4dfb2df418f2
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parents:
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diff
changeset
|
5385 // |
4dfb2df418f2
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diff
changeset
|
5386 // If the referent has not been forwarded then we have to keep |
4dfb2df418f2
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diff
changeset
|
5387 // it alive by policy. Therefore we have copy the referent. |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5388 // |
4dfb2df418f2
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parents:
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diff
changeset
|
5389 // If the reference field is in the G1 heap then we can push |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5390 // on the PSS queue. When the queue is drained (after each |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5391 // phase of reference processing) the object and it's followers |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5392 // will be copied, the reference field set to point to the |
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5393 // new location, and the RSet updated. Otherwise we need to |
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5394 // use the the non-heap or metadata closures directly to copy |
10405 | 5395 // the referent object and update the pointer, while avoiding |
3979
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|
5396 // updating the RSet. |
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diff
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|
5397 |
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|
5398 if (_g1h->is_in_g1_reserved(p)) { |
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|
5399 _par_scan_state->push_on_queue(p); |
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|
5400 } else { |
17935
7384f6a12fc1
8038212: Method::is_valid_method() check has performance regression impact for stackwalking
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|
5401 assert(!Metaspace::contains((const void*)p), |
6725
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5402 err_msg("Otherwise need to call _copy_metadata_obj_cl->do_oop(p) " |
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|
5403 PTR_FORMAT, p)); |
3979
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|
5404 _copy_non_heap_obj_cl->do_oop(p); |
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|
5405 } |
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|
5406 } |
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|
5407 } |
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|
5408 }; |
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|
5409 |
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|
5410 // Serial drain queue closure. Called as the 'complete_gc' |
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|
5411 // closure for each discovered list in some of the |
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|
5412 // reference processing phases. |
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|
5413 |
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|
5414 class G1STWDrainQueueClosure: public VoidClosure { |
4dfb2df418f2
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|
5415 protected: |
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|
5416 G1CollectedHeap* _g1h; |
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|
5417 G1ParScanThreadState* _par_scan_state; |
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|
5418 |
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|
5419 G1ParScanThreadState* par_scan_state() { return _par_scan_state; } |
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|
5420 |
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|
5421 public: |
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|
5422 G1STWDrainQueueClosure(G1CollectedHeap* g1h, G1ParScanThreadState* pss) : |
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|
5423 _g1h(g1h), |
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|
5424 _par_scan_state(pss) |
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|
5425 { } |
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|
5426 |
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|
5427 void do_void() { |
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|
5428 G1ParScanThreadState* const pss = par_scan_state(); |
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|
5429 pss->trim_queue(); |
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|
5430 } |
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|
5431 }; |
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|
5432 |
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|
5433 // Parallel Reference Processing closures |
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|
5434 |
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|
5435 // Implementation of AbstractRefProcTaskExecutor for parallel reference |
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|
5436 // processing during G1 evacuation pauses. |
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|
5437 |
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|
5438 class G1STWRefProcTaskExecutor: public AbstractRefProcTaskExecutor { |
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|
5439 private: |
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|
5440 G1CollectedHeap* _g1h; |
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|
5441 RefToScanQueueSet* _queues; |
4095
bca17e38de00
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|
5442 FlexibleWorkGang* _workers; |
3979
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|
5443 int _active_workers; |
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|
5444 |
4dfb2df418f2
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|
5445 public: |
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|
5446 G1STWRefProcTaskExecutor(G1CollectedHeap* g1h, |
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|
5447 FlexibleWorkGang* workers, |
3979
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|
5448 RefToScanQueueSet *task_queues, |
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|
5449 int n_workers) : |
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|
5450 _g1h(g1h), |
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diff
changeset
|
5451 _queues(task_queues), |
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diff
changeset
|
5452 _workers(workers), |
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diff
changeset
|
5453 _active_workers(n_workers) |
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diff
changeset
|
5454 { |
4dfb2df418f2
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|
5455 assert(n_workers > 0, "shouldn't call this otherwise"); |
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|
5456 } |
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diff
changeset
|
5457 |
4dfb2df418f2
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diff
changeset
|
5458 // Executes the given task using concurrent marking worker threads. |
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diff
changeset
|
5459 virtual void execute(ProcessTask& task); |
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diff
changeset
|
5460 virtual void execute(EnqueueTask& task); |
4dfb2df418f2
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parents:
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diff
changeset
|
5461 }; |
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diff
changeset
|
5462 |
4dfb2df418f2
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diff
changeset
|
5463 // Gang task for possibly parallel reference processing |
4dfb2df418f2
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diff
changeset
|
5464 |
4dfb2df418f2
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|
5465 class G1STWRefProcTaskProxy: public AbstractGangTask { |
4dfb2df418f2
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diff
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|
5466 typedef AbstractRefProcTaskExecutor::ProcessTask ProcessTask; |
4dfb2df418f2
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parents:
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diff
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|
5467 ProcessTask& _proc_task; |
4dfb2df418f2
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diff
changeset
|
5468 G1CollectedHeap* _g1h; |
4dfb2df418f2
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diff
changeset
|
5469 RefToScanQueueSet *_task_queues; |
4dfb2df418f2
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diff
changeset
|
5470 ParallelTaskTerminator* _terminator; |
4dfb2df418f2
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parents:
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diff
changeset
|
5471 |
4dfb2df418f2
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parents:
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diff
changeset
|
5472 public: |
4dfb2df418f2
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parents:
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diff
changeset
|
5473 G1STWRefProcTaskProxy(ProcessTask& proc_task, |
4dfb2df418f2
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diff
changeset
|
5474 G1CollectedHeap* g1h, |
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3973
diff
changeset
|
5475 RefToScanQueueSet *task_queues, |
4dfb2df418f2
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parents:
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diff
changeset
|
5476 ParallelTaskTerminator* terminator) : |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5477 AbstractGangTask("Process reference objects in parallel"), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5478 _proc_task(proc_task), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5479 _g1h(g1h), |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5480 _task_queues(task_queues), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5481 _terminator(terminator) |
4dfb2df418f2
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parents:
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diff
changeset
|
5482 {} |
4dfb2df418f2
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diff
changeset
|
5483 |
4728
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jmasa
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4711
diff
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|
5484 virtual void work(uint worker_id) { |
3979
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parents:
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diff
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|
5485 // The reference processing task executed by a single worker. |
4dfb2df418f2
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parents:
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diff
changeset
|
5486 ResourceMark rm; |
4dfb2df418f2
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diff
changeset
|
5487 HandleMark hm; |
4dfb2df418f2
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diff
changeset
|
5488 |
4dfb2df418f2
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diff
changeset
|
5489 G1STWIsAliveClosure is_alive(_g1h); |
4dfb2df418f2
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|
5490 |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5491 G1ParScanThreadState pss(_g1h, worker_id, NULL); |
3979
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|
5492 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
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|
5493 |
3979
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|
5494 pss.set_evac_failure_closure(&evac_failure_cl); |
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|
5495 |
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diff
changeset
|
5496 G1ParScanExtRootClosure only_copy_non_heap_cl(_g1h, &pss, NULL); |
6725
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|
5497 G1ParScanMetadataClosure only_copy_metadata_cl(_g1h, &pss, NULL); |
3979
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|
5498 |
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diff
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|
5499 G1ParScanAndMarkExtRootClosure copy_mark_non_heap_cl(_g1h, &pss, NULL); |
6725
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coleenp
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diff
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|
5500 G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(_g1h, &pss, NULL); |
3979
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|
5501 |
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diff
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|
5502 OopClosure* copy_non_heap_cl = &only_copy_non_heap_cl; |
6725
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coleenp
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|
5503 OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
3979
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|
5504 |
4dfb2df418f2
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diff
changeset
|
5505 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
4dfb2df418f2
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parents:
3973
diff
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|
5506 // We also need to mark copied objects. |
4dfb2df418f2
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diff
changeset
|
5507 copy_non_heap_cl = ©_mark_non_heap_cl; |
6725
da91efe96a93
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coleenp
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6629
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|
5508 copy_metadata_cl = ©_mark_metadata_cl; |
3979
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diff
changeset
|
5509 } |
4dfb2df418f2
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diff
changeset
|
5510 |
4dfb2df418f2
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diff
changeset
|
5511 // Keep alive closure. |
6725
da91efe96a93
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coleenp
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6629
diff
changeset
|
5512 G1CopyingKeepAliveClosure keep_alive(_g1h, copy_non_heap_cl, copy_metadata_cl, &pss); |
3979
4dfb2df418f2
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diff
changeset
|
5513 |
4dfb2df418f2
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diff
changeset
|
5514 // Complete GC closure |
4dfb2df418f2
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diff
changeset
|
5515 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _task_queues, _terminator); |
4dfb2df418f2
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|
5516 |
4dfb2df418f2
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diff
changeset
|
5517 // Call the reference processing task's work routine. |
4728
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jmasa
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4711
diff
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|
5518 _proc_task.work(worker_id, is_alive, keep_alive, drain_queue); |
3979
4dfb2df418f2
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diff
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|
5519 |
4dfb2df418f2
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diff
changeset
|
5520 // Note we cannot assert that the refs array is empty here as not all |
4dfb2df418f2
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diff
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|
5521 // of the processing tasks (specifically phase2 - pp2_work) execute |
4dfb2df418f2
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diff
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|
5522 // the complete_gc closure (which ordinarily would drain the queue) so |
4dfb2df418f2
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changeset
|
5523 // the queue may not be empty. |
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|
5524 } |
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|
5525 }; |
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parents:
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diff
changeset
|
5526 |
4dfb2df418f2
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diff
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|
5527 // Driver routine for parallel reference processing. |
4dfb2df418f2
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parents:
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diff
changeset
|
5528 // Creates an instance of the ref processing gang |
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parents:
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diff
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|
5529 // task and has the worker threads execute it. |
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parents:
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diff
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|
5530 void G1STWRefProcTaskExecutor::execute(ProcessTask& proc_task) { |
4dfb2df418f2
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parents:
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diff
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|
5531 assert(_workers != NULL, "Need parallel worker threads."); |
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parents:
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diff
changeset
|
5532 |
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parents:
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diff
changeset
|
5533 ParallelTaskTerminator terminator(_active_workers, _queues); |
4dfb2df418f2
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parents:
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|
5534 G1STWRefProcTaskProxy proc_task_proxy(proc_task, _g1h, _queues, &terminator); |
4dfb2df418f2
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parents:
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|
5535 |
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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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|
5536 _g1h->set_par_threads(_active_workers); |
4dfb2df418f2
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|
5537 _workers->run_task(&proc_task_proxy); |
4dfb2df418f2
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parents:
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|
5538 _g1h->set_par_threads(0); |
4dfb2df418f2
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parents:
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diff
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|
5539 } |
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parents:
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diff
changeset
|
5540 |
4dfb2df418f2
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parents:
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diff
changeset
|
5541 // Gang task for parallel reference enqueueing. |
4dfb2df418f2
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parents:
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diff
changeset
|
5542 |
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parents:
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|
5543 class G1STWRefEnqueueTaskProxy: public AbstractGangTask { |
4dfb2df418f2
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|
5544 typedef AbstractRefProcTaskExecutor::EnqueueTask EnqueueTask; |
4dfb2df418f2
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parents:
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|
5545 EnqueueTask& _enq_task; |
4dfb2df418f2
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parents:
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diff
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|
5546 |
4dfb2df418f2
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parents:
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|
5547 public: |
4dfb2df418f2
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parents:
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diff
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|
5548 G1STWRefEnqueueTaskProxy(EnqueueTask& enq_task) : |
4dfb2df418f2
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parents:
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|
5549 AbstractGangTask("Enqueue reference objects in parallel"), |
4dfb2df418f2
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parents:
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diff
changeset
|
5550 _enq_task(enq_task) |
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parents:
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diff
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|
5551 { } |
4dfb2df418f2
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parents:
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|
5552 |
4728
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|
5553 virtual void work(uint worker_id) { |
441e946dc1af
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jmasa
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|
5554 _enq_task.work(worker_id); |
3979
4dfb2df418f2
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|
5555 } |
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parents:
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diff
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|
5556 }; |
4dfb2df418f2
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parents:
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|
5557 |
10405 | 5558 // Driver routine for parallel reference enqueueing. |
3979
4dfb2df418f2
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|
5559 // Creates an instance of the ref enqueueing gang |
4dfb2df418f2
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parents:
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diff
changeset
|
5560 // task and has the worker threads execute it. |
4dfb2df418f2
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parents:
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diff
changeset
|
5561 |
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parents:
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|
5562 void G1STWRefProcTaskExecutor::execute(EnqueueTask& enq_task) { |
4dfb2df418f2
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parents:
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diff
changeset
|
5563 assert(_workers != NULL, "Need parallel worker threads."); |
4dfb2df418f2
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parents:
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diff
changeset
|
5564 |
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parents:
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diff
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|
5565 G1STWRefEnqueueTaskProxy enq_task_proxy(enq_task); |
4dfb2df418f2
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parents:
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|
5566 |
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parents:
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|
5567 _g1h->set_par_threads(_active_workers); |
4dfb2df418f2
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|
5568 _workers->run_task(&enq_task_proxy); |
4dfb2df418f2
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parents:
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|
5569 _g1h->set_par_threads(0); |
4dfb2df418f2
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parents:
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diff
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|
5570 } |
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parents:
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diff
changeset
|
5571 |
4dfb2df418f2
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parents:
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diff
changeset
|
5572 // End of weak reference support closures |
4dfb2df418f2
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parents:
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diff
changeset
|
5573 |
4dfb2df418f2
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parents:
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diff
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|
5574 // Abstract task used to preserve (i.e. copy) any referent objects |
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|
5575 // that are in the collection set and are pointed to by reference |
4dfb2df418f2
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parents:
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diff
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|
5576 // objects discovered by the CM ref processor. |
4dfb2df418f2
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parents:
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diff
changeset
|
5577 |
4dfb2df418f2
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parents:
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diff
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|
5578 class G1ParPreserveCMReferentsTask: public AbstractGangTask { |
4dfb2df418f2
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parents:
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diff
changeset
|
5579 protected: |
4dfb2df418f2
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parents:
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diff
changeset
|
5580 G1CollectedHeap* _g1h; |
4dfb2df418f2
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parents:
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diff
changeset
|
5581 RefToScanQueueSet *_queues; |
4dfb2df418f2
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parents:
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diff
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|
5582 ParallelTaskTerminator _terminator; |
4728
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jmasa
parents:
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diff
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|
5583 uint _n_workers; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5584 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5585 public: |
4dfb2df418f2
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parents:
3973
diff
changeset
|
5586 G1ParPreserveCMReferentsTask(G1CollectedHeap* g1h,int workers, RefToScanQueueSet *task_queues) : |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5587 AbstractGangTask("ParPreserveCMReferents"), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5588 _g1h(g1h), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5589 _queues(task_queues), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5590 _terminator(workers, _queues), |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5591 _n_workers(workers) |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5592 { } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5593 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5594 void work(uint worker_id) { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5595 ResourceMark rm; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5596 HandleMark hm; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5597 |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5598 G1ParScanThreadState pss(_g1h, worker_id, NULL); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5599 G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL); |
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
5600 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5601 pss.set_evac_failure_closure(&evac_failure_cl); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5602 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5603 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
|
5604 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5605 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5606 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
|
5607 G1ParScanMetadataClosure only_copy_metadata_cl(_g1h, &pss, NULL); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5608 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5609 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
|
5610 G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(_g1h, &pss, NULL); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5611 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5612 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
|
5613 OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5614 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5615 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5616 // We also need to mark copied objects. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5617 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
|
5618 copy_metadata_cl = ©_mark_metadata_cl; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5619 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5620 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5621 // Is alive closure |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5622 G1AlwaysAliveClosure always_alive(_g1h); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5623 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
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diff
changeset
|
5624 // 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
|
5625 // to be copied. |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5626 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
|
5627 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5628 ReferenceProcessor* rp = _g1h->ref_processor_cm(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5629 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5630 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
|
5631 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
|
5632 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5633 // 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
|
5634 // So this must be true - but assert just in case someone decides to |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5635 // change the worker ids. |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5636 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
|
5637 assert(!rp->discovery_is_atomic(), "check this code"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5638 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5639 // 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
|
5640 for (uint idx = worker_id; idx < limit; idx += stride) { |
4014
bf2d2b8b1726
7095243: Disambiguate ReferenceProcessor::_discoveredSoftRefs
johnc
parents:
4013
diff
changeset
|
5641 DiscoveredList& ref_list = rp->discovered_refs()[idx]; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5642 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5643 DiscoveredListIterator iter(ref_list, &keep_alive, &always_alive); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5644 while (iter.has_next()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5645 // Since discovery is not atomic for the CM ref processor, we |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5646 // can see some null referent objects. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5647 iter.load_ptrs(DEBUG_ONLY(true)); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5648 oop ref = iter.obj(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5649 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5650 // This will filter nulls. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5651 if (iter.is_referent_alive()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5652 iter.make_referent_alive(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5653 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5654 iter.move_to_next(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5655 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5656 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5657 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5658 // Drain the queue - which may cause stealing |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5659 G1ParEvacuateFollowersClosure drain_queue(_g1h, &pss, _queues, &_terminator); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5660 drain_queue.do_void(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5661 // Allocation buffers were retired at the end of G1ParEvacuateFollowersClosure |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5662 assert(pss.refs()->is_empty(), "should be"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5663 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5664 }; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5665 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5666 // Weak Reference processing during an evacuation pause (part 1). |
6819 | 5667 void G1CollectedHeap::process_discovered_references(uint no_of_gc_workers) { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5668 double ref_proc_start = os::elapsedTime(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5669 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5670 ReferenceProcessor* rp = _ref_processor_stw; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5671 assert(rp->discovery_enabled(), "should have been enabled"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5672 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5673 // Any reference objects, in the collection set, that were 'discovered' |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5674 // 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
|
5675 // applying the external root copy closure to the discovered lists, or |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5676 // by following an RSet entry). |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5677 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5678 // 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
|
5679 // 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
|
5680 // processor would have seen that the reference object had already |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5681 // been 'discovered' and would have skipped discovering the reference, |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5682 // but would not have treated the reference object as a regular oop. |
10405 | 5683 // 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
|
5684 // referent object. |
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 // We need to explicitly copy these referent objects - the references |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5687 // will be processed at the end of remarking. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5688 // |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5689 // 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
|
5690 // 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
|
5691 // referents points to another object which is also referenced by an |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5692 // object discovered by the STW ref processor. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
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parents:
3973
diff
changeset
|
5693 |
4711 | 5694 assert(!G1CollectedHeap::use_parallel_gc_threads() || |
6819 | 5695 no_of_gc_workers == workers()->active_workers(), |
5696 "Need to reset active GC workers"); | |
5697 | |
5698 set_par_threads(no_of_gc_workers); | |
5699 G1ParPreserveCMReferentsTask keep_cm_referents(this, | |
5700 no_of_gc_workers, | |
5701 _task_queues); | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5702 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5703 if (G1CollectedHeap::use_parallel_gc_threads()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5704 workers()->run_task(&keep_cm_referents); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5705 } else { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5706 keep_cm_referents.work(0); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5707 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5708 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5709 set_par_threads(0); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5710 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5711 // Closure to test whether a referent is alive. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5712 G1STWIsAliveClosure is_alive(this); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5713 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5714 // Even when parallel reference processing is enabled, the processing |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5715 // 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
|
5716 // 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
|
5717 // JNI refs. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5718 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5719 // Use only a single queue for this PSS. |
17689
5d492d192cbf
8035329: Move G1ParCopyClosure::copy_to_survivor_space into G1ParScanThreadState
tschatzl
parents:
17688
diff
changeset
|
5720 G1ParScanThreadState pss(this, 0, NULL); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5721 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5722 // We do not embed a reference processor in the copying/scanning |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5723 // closures while we're actually processing the discovered |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5724 // reference objects. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5725 G1ParScanHeapEvacFailureClosure evac_failure_cl(this, &pss, NULL); |
17759
bc22cbb8b45a
8035330: Remove G1ParScanPartialArrayClosure and G1ParScanHeapEvacClosure
tschatzl
parents:
17758
diff
changeset
|
5726 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5727 pss.set_evac_failure_closure(&evac_failure_cl); |
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 assert(pss.refs()->is_empty(), "pre-condition"); |
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 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
|
5732 G1ParScanMetadataClosure only_copy_metadata_cl(this, &pss, NULL); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5733 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5734 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
|
5735 G1ParScanAndMarkMetadataClosure copy_mark_metadata_cl(this, &pss, NULL); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5736 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5737 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
|
5738 OopsInHeapRegionClosure* copy_metadata_cl = &only_copy_metadata_cl; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5739 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5740 if (_g1h->g1_policy()->during_initial_mark_pause()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5741 // We also need to mark copied objects. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5742 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
|
5743 copy_metadata_cl = ©_mark_metadata_cl; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5744 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5745 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5746 // Keep alive closure. |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6629
diff
changeset
|
5747 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
|
5748 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5749 // Serial Complete GC closure |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5750 G1STWDrainQueueClosure drain_queue(this, &pss); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5751 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5752 // Setup the soft refs policy... |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5753 rp->setup_policy(false); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5754 |
10405 | 5755 ReferenceProcessorStats stats; |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5756 if (!rp->processing_is_mt()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5757 // Serial reference processing... |
10405 | 5758 stats = rp->process_discovered_references(&is_alive, |
5759 &keep_alive, | |
5760 &drain_queue, | |
5761 NULL, | |
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5762 _gc_timer_stw, |
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5763 _gc_tracer_stw->gc_id()); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5764 } else { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5765 // Parallel reference processing |
6819 | 5766 assert(rp->num_q() == no_of_gc_workers, "sanity"); |
5767 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
5768 | |
5769 G1STWRefProcTaskExecutor par_task_executor(this, workers(), _task_queues, no_of_gc_workers); | |
10405 | 5770 stats = rp->process_discovered_references(&is_alive, |
5771 &keep_alive, | |
5772 &drain_queue, | |
5773 &par_task_executor, | |
20190
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5774 _gc_timer_stw, |
0982ec23da03
8043607: Add a GC id as a log decoration similar to PrintGCTimeStamps
brutisso
parents:
17992
diff
changeset
|
5775 _gc_tracer_stw->gc_id()); |
10405 | 5776 } |
5777 | |
5778 _gc_tracer_stw->report_gc_reference_stats(stats); | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5779 // We have completed copying any necessary live referent objects |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5780 // (that were not copied during the actual pause) so we can |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5781 // retire any active alloc buffers |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5782 pss.retire_alloc_buffers(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5783 assert(pss.refs()->is_empty(), "both queue and overflow should be empty"); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5784 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5785 double ref_proc_time = os::elapsedTime() - ref_proc_start; |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5786 g1_policy()->phase_times()->record_ref_proc_time(ref_proc_time * 1000.0); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5787 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5788 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5789 // Weak Reference processing during an evacuation pause (part 2). |
6819 | 5790 void G1CollectedHeap::enqueue_discovered_references(uint no_of_gc_workers) { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5791 double ref_enq_start = os::elapsedTime(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5792 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5793 ReferenceProcessor* rp = _ref_processor_stw; |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5794 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
|
5795 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5796 // Now enqueue any remaining on the discovered lists on to |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5797 // the pending list. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5798 if (!rp->processing_is_mt()) { |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5799 // Serial reference processing... |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5800 rp->enqueue_discovered_references(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5801 } else { |
10405 | 5802 // Parallel reference enqueueing |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5803 |
6819 | 5804 assert(no_of_gc_workers == workers()->active_workers(), |
5805 "Need to reset active workers"); | |
5806 assert(rp->num_q() == no_of_gc_workers, "sanity"); | |
5807 assert(no_of_gc_workers <= rp->max_num_q(), "sanity"); | |
5808 | |
5809 G1STWRefProcTaskExecutor par_task_executor(this, workers(), _task_queues, no_of_gc_workers); | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5810 rp->enqueue_discovered_references(&par_task_executor); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5811 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5812 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5813 rp->verify_no_references_recorded(); |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5814 assert(!rp->discovery_enabled(), "should have been disabled"); |
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 // FIXME |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5817 // CM's reference processing also cleans up the string and symbol tables. |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5818 // Should we do that here also? We could, but it is a serial operation |
10405 | 5819 // and could significantly increase the pause time. |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5820 |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5821 double ref_enq_time = os::elapsedTime() - ref_enq_start; |
6219
922993931b3d
7178361: G1: Make sure that PrintGC and PrintGCDetails use the same timing for the GC pause
brutisso
parents:
6188
diff
changeset
|
5822 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
|
5823 } |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5824 |
10405 | 5825 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
|
5826 _expand_heap_after_alloc_failure = true; |
10405 | 5827 _evacuation_failed = false; |
342 | 5828 |
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5829 // 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
|
5830 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
|
5831 |
342 | 5832 g1_rem_set()->prepare_for_oops_into_collection_set_do(); |
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5833 |
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5834 // Disable the hot card cache. |
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5835 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
|
5836 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
|
5837 hot_card_cache->set_use_cache(false); |
889 | 5838 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
5839 uint n_workers; |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5840 if (G1CollectedHeap::use_parallel_gc_threads()) { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5841 n_workers = |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5842 AdaptiveSizePolicy::calc_active_workers(workers()->total_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5843 workers()->active_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5844 Threads::number_of_non_daemon_threads()); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5845 assert(UseDynamicNumberOfGCThreads || |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5846 n_workers == workers()->total_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5847 "If not dynamic should be using all the workers"); |
4711 | 5848 workers()->set_active_workers(n_workers); |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5849 set_par_threads(n_workers); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5850 } else { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5851 assert(n_par_threads() == 0, |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5852 "Should be the original non-parallel value"); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5853 n_workers = 1; |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5854 } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5855 |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
5856 G1ParTask g1_par_task(this, _task_queues); |
342 | 5857 |
5858 init_for_evac_failure(NULL); | |
5859 | |
5860 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
|
5861 |
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5862 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
|
5863 double start_par_time_sec = os::elapsedTime(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5864 double end_par_time_sec; |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5865 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5866 { |
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
890
diff
changeset
|
5867 StrongRootsScope srs(this); |
5986
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5868 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5869 if (G1CollectedHeap::use_parallel_gc_threads()) { |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5870 // 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
|
5871 if (ParallelGCVerbose) G1ParScanThreadState::print_termination_stats_hdr(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5872 // These tasks use ShareHeap::_process_strong_tasks |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5873 assert(UseDynamicNumberOfGCThreads || |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5874 workers()->active_workers() == workers()->total_workers(), |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5875 "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
|
5876 workers()->run_task(&g1_par_task); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5877 } else { |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5878 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
|
5879 g1_par_task.work(0); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5880 } |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5881 end_par_time_sec = os::elapsedTime(); |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5882 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5883 // 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
|
5884 // 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
|
5885 // 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
|
5886 // 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
|
5887 // reported parallel time. |
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 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5890 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
|
5891 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
|
5892 |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5893 double code_root_fixup_time_ms = |
500023bd0818
7143511: G1: Another instance of high GC Worker Other time (50ms)
johnc
parents:
5963
diff
changeset
|
5894 (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
|
5895 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
|
5896 |
342 | 5897 set_par_threads(0); |
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5898 |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5899 // Process any discovered reference objects - we have |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5900 // to do this _before_ we retire the GC alloc regions |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5901 // as we may have to copy some 'reachable' referent |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5902 // objects (and their reachable sub-graphs) that were |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5903 // not copied during the pause. |
6819 | 5904 process_discovered_references(n_workers); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5905 |
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1973
diff
changeset
|
5906 // Weak root processing. |
342 | 5907 { |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5908 G1STWIsAliveClosure is_alive(this); |
342 | 5909 G1KeepAliveClosure keep_alive(this); |
5910 JNIHandles::weak_oops_do(&is_alive, &keep_alive); | |
17764 | 5911 if (G1StringDedup::is_enabled()) { |
5912 G1StringDedup::unlink_or_oops_do(&is_alive, &keep_alive); | |
5913 } | |
342 | 5914 } |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5915 |
10405 | 5916 release_gc_alloc_regions(n_workers, evacuation_info); |
342 | 5917 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
|
5918 |
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5919 // 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
|
5920 // 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
|
5921 // 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
|
5922 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
|
5923 hot_card_cache->set_use_cache(true); |
342 | 5924 |
12080 | 5925 // Migrate the strong code roots attached to each region in |
5926 // the collection set. Ideally we would like to do this | |
5927 // after we have finished the scanning/evacuation of the | |
5928 // strong code roots for a particular heap region. | |
5929 migrate_strong_code_roots(); | |
5930 | |
17753
191174b49bec
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
17749
diff
changeset
|
5931 purge_code_root_memory(); |
191174b49bec
8035406: Improve data structure for Code Cache remembered sets
tschatzl
parents:
17749
diff
changeset
|
5932 |
12080 | 5933 if (g1_policy()->during_initial_mark_pause()) { |
5934 // Reset the claim values set during marking the strong code roots | |
5935 reset_heap_region_claim_values(); | |
5936 } | |
5937 | |
342 | 5938 finalize_for_evac_failure(); |
5939 | |
5940 if (evacuation_failed()) { | |
5941 remove_self_forwarding_pointers(); | |
6629
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5942 |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5943 // Reset the G1EvacuationFailureALot counters and flags |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5944 // 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
|
5945 // evacuation failure occurs. |
c9814fadeb38
7041879: G1: introduce stress testing parameter to cause frequent evacuation failures
johnc
parents:
6628
diff
changeset
|
5946 NOT_PRODUCT(reset_evacuation_should_fail();) |
342 | 5947 } |
5948 | |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5949 // Enqueue any remaining references remaining on the STW |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5950 // reference processor's discovered lists. We need to do |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5951 // this after the card table is cleaned (and verified) as |
10405 | 5952 // the act of enqueueing entries on to the pending list |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5953 // will log these updates (and dirty their associated |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5954 // cards). We need these updates logged to update any |
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5955 // RSets. |
6819 | 5956 enqueue_discovered_references(n_workers); |
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3973
diff
changeset
|
5957 |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5958 if (G1DeferredRSUpdate) { |
17756
a07bea31ef35
8035398: Add card redirty time in "Other" time in G1
tschatzl
parents:
17755
diff
changeset
|
5959 redirty_logged_cards(); |
616
4f360ec815ba
6720309: G1: don't synchronously update RSet during evacuation pauses
iveresov
parents:
595
diff
changeset
|
5960 } |
342 | 5961 COMPILER2_PRESENT(DerivedPointerTable::update_pointers()); |
5962 } | |
5963 | |
2152 | 5964 void G1CollectedHeap::free_region(HeapRegion* hr, |
5965 FreeRegionList* free_list, | |
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
5966 bool par, |
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
5967 bool locked) { |
2152 | 5968 assert(!hr->isHumongous(), "this is only for non-humongous regions"); |
5969 assert(!hr->is_empty(), "the region should not be empty"); | |
5970 assert(free_list != NULL, "pre-condition"); | |
5971 | |
10246
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5972 // 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
|
5973 // 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
|
5974 // (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
|
5975 if (!hr->is_young()) { |
194f52aa2f23
7176479: G1: JVM crashes on T5-8 system with 1.5 TB heap
johnc
parents:
10242
diff
changeset
|
5976 _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
|
5977 } |
17755
96b1c2e06e25
8027295: Free CSet takes ~50% of young pause time
tschatzl
parents:
17753
diff
changeset
|
5978 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
|
5979 free_list->add_ordered(hr); |
2152 | 5980 } |
5981 | |
5982 void G1CollectedHeap::free_humongous_region(HeapRegion* hr, | |
5983 FreeRegionList* free_list, | |
5984 bool par) { | |
5985 assert(hr->startsHumongous(), "this is only for starts humongous regions"); | |
5986 assert(free_list != NULL, "pre-condition"); | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5987 |
2152 | 5988 size_t hr_capacity = hr->capacity(); |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5989 // 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
|
5990 // otherwise the information will be gone. |
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5991 uint last_index = hr->last_hc_index(); |
2152 | 5992 hr->set_notHumongous(); |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
5993 free_region(hr, free_list, par); |
2152 | 5994 |
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
5995 uint i = hr->hrs_index() + 1; |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5996 while (i < last_index) { |
3766 | 5997 HeapRegion* curr_hr = region_at(i); |
6254
a2f7274eb6ef
7114678: G1: various small fixes, code cleanup, and refactoring
tonyp
parents:
6220
diff
changeset
|
5998 assert(curr_hr->continuesHumongous(), "invariant"); |
2152 | 5999 curr_hr->set_notHumongous(); |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6000 free_region(curr_hr, free_list, par); |
2152 | 6001 i += 1; |
6002 } | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6003 } |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6004 |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6005 void G1CollectedHeap::remove_from_old_sets(const HeapRegionSetCount& old_regions_removed, |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6006 const HeapRegionSetCount& humongous_regions_removed) { |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6007 if (old_regions_removed.length() > 0 || humongous_regions_removed.length() > 0) { |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6008 MutexLockerEx x(OldSets_lock, Mutex::_no_safepoint_check_flag); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6009 _old_set.bulk_remove(old_regions_removed); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6010 _humongous_set.bulk_remove(humongous_regions_removed); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6011 } |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6012 |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6013 } |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6014 |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6015 void G1CollectedHeap::prepend_to_freelist(FreeRegionList* list) { |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6016 assert(list != NULL, "list can't be null"); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6017 if (!list->is_empty()) { |
2152 | 6018 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
|
6019 _free_list.add_ordered(list); |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6020 } |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6021 } |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6022 |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6023 void G1CollectedHeap::decrement_summary_bytes(size_t bytes) { |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6024 assert(_summary_bytes_used >= bytes, |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6025 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
|
6026 _summary_bytes_used, bytes)); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
17727
diff
changeset
|
6027 _summary_bytes_used -= bytes; |
342 | 6028 } |
6029 | |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6030 class G1ParCleanupCTTask : public AbstractGangTask { |
12343 | 6031 G1SATBCardTableModRefBS* _ct_bs; |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6032 G1CollectedHeap* _g1h; |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6033 HeapRegion* volatile _su_head; |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6034 public: |
12343 | 6035 G1ParCleanupCTTask(G1SATBCardTableModRefBS* ct_bs, |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6036 G1CollectedHeap* g1h) : |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6037 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
|
6038 _ct_bs(ct_bs), _g1h(g1h) { } |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6039 |
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
6040 void work(uint worker_id) { |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6041 HeapRegion* r; |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6042 while (r = _g1h->pop_dirty_cards_region()) { |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6043 clear_cards(r); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6044 } |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6045 } |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6046 |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6047 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
|
6048 // 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
|
6049 if (!r->is_survivor()) { |
796
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6050 _ct_bs->clear(MemRegion(r->bottom(), r->end())); |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6051 } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6052 } |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6053 }; |
29e7d79232b9
6819065: G1: eliminate high serial card table clearing time
apetrusenko
parents:
794
diff
changeset
|
6054 |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6055 #ifndef PRODUCT |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6056 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
|
6057 G1CollectedHeap* _g1h; |
12343 | 6058 G1SATBCardTableModRefBS* _ct_bs; |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6059 public: |
12343 | 6060 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
|
6061 : _g1h(g1h), _ct_bs(ct_bs) { } |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6062 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
|
6063 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
|
6064 _g1h->verify_dirty_region(r); |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6065 } else { |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6066 _g1h->verify_not_dirty_region(r); |
940
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6067 } |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6068 return false; |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6069 } |
8624da129f0b
6841313: G1: dirty cards of survivor regions in parallel
apetrusenko
parents:
936
diff
changeset
|
6070 }; |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6071 |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6072 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
|
6073 // All of the region should be clean. |
12343 | 6074 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
|
6075 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
|
6076 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
|
6077 } |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6078 |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6079 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
|
6080 // 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
|
6081 // 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
|
6082 // retires each region and replaces it with a new one will do a |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6083 // maximal allocation to fill in [pre_dummy_top(),end()] but will |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6084 // not dirty that area (one less thing to have to do while holding |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6085 // a lock). So we can only verify that [bottom(),pre_dummy_top()] |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6086 // is dirty. |
12343 | 6087 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
|
6088 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
|
6089 if (hr->is_young()) { |
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6090 ct_bs->verify_g1_young_region(mr); |
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6091 } else { |
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6092 ct_bs->verify_dirty_region(mr); |
69944b868a32
8014555: G1: Memory ordering problem with Conc refinement and card marking
mgerdin
parents:
12345
diff
changeset
|
6093 } |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6094 } |
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6095 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6096 void G1CollectedHeap::verify_dirty_young_list(HeapRegion* head) { |
12343 | 6097 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6098 for (HeapRegion* hr = head; hr != NULL; hr = hr->get_next_young_region()) { |
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3293
diff
changeset
|
6099 verify_dirty_region(hr); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6100 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6101 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6102 |
abdfc822206f
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6103 void G1CollectedHeap::verify_dirty_young_regions() { |
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6104 verify_dirty_young_list(_young_list->first_region()); |
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|
6105 } |
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|
6106 #endif |
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6107 |
342 | 6108 void G1CollectedHeap::cleanUpCardTable() { |
12343 | 6109 G1SATBCardTableModRefBS* ct_bs = g1_barrier_set(); |
342 | 6110 double start = os::elapsedTime(); |
6111 | |
4023 | 6112 { |
6113 // Iterate over the dirty cards region list. | |
6114 G1ParCleanupCTTask cleanup_task(ct_bs, this); | |
6115 | |
4711 | 6116 if (G1CollectedHeap::use_parallel_gc_threads()) { |
6117 set_par_threads(); | |
4023 | 6118 workers()->run_task(&cleanup_task); |
6119 set_par_threads(0); | |
6120 } else { | |
6121 while (_dirty_cards_region_list) { | |
6122 HeapRegion* r = _dirty_cards_region_list; | |
6123 cleanup_task.clear_cards(r); | |
6124 _dirty_cards_region_list = r->get_next_dirty_cards_region(); | |
6125 if (_dirty_cards_region_list == r) { | |
6126 // The last region. | |
6127 _dirty_cards_region_list = NULL; | |
6128 } | |
6129 r->set_next_dirty_cards_region(NULL); | |
796
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|
6130 } |
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|
6131 } |
4023 | 6132 #ifndef PRODUCT |
6133 if (G1VerifyCTCleanup || VerifyAfterGC) { | |
6134 G1VerifyCardTableCleanup cleanup_verifier(this, ct_bs); | |
6135 heap_region_iterate(&cleanup_verifier); | |
6136 } | |
6137 #endif | |
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6138 } |
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6139 |
342 | 6140 double elapsed = os::elapsedTime() - start; |
6219
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|
6141 g1_policy()->phase_times()->record_clear_ct_time(elapsed * 1000.0); |
342 | 6142 } |
6143 | |
10405 | 6144 void G1CollectedHeap::free_collection_set(HeapRegion* cs_head, EvacuationInfo& evacuation_info) { |
2152 | 6145 size_t pre_used = 0; |
6146 FreeRegionList local_free_list("Local List for CSet Freeing"); | |
6147 | |
342 | 6148 double young_time_ms = 0.0; |
6149 double non_young_time_ms = 0.0; | |
6150 | |
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6151 // Since the collection set is a superset of the the young list, |
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6152 // all we need to do to clear the young list is clear its |
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6153 // head and length, and unlink any young regions in the code below |
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6154 _young_list->clear(); |
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6155 |
342 | 6156 G1CollectorPolicy* policy = g1_policy(); |
6157 | |
6158 double start_sec = os::elapsedTime(); | |
6159 bool non_young = true; | |
6160 | |
6161 HeapRegion* cur = cs_head; | |
6162 int age_bound = -1; | |
6163 size_t rs_lengths = 0; | |
6164 | |
6165 while (cur != NULL) { | |
2361 | 6166 assert(!is_on_master_free_list(cur), "sanity"); |
342 | 6167 if (non_young) { |
6168 if (cur->is_young()) { | |
6169 double end_sec = os::elapsedTime(); | |
6170 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
6171 non_young_time_ms += elapsed_ms; | |
6172 | |
6173 start_sec = os::elapsedTime(); | |
6174 non_young = false; | |
6175 } | |
6176 } else { | |
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6177 if (!cur->is_young()) { |
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6178 double end_sec = os::elapsedTime(); |
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6179 double elapsed_ms = (end_sec - start_sec) * 1000.0; |
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6180 young_time_ms += elapsed_ms; |
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|
6181 |
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6182 start_sec = os::elapsedTime(); |
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6183 non_young = true; |
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6184 } |
342 | 6185 } |
6186 | |
17755
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6187 rs_lengths += cur->rem_set()->occupied_locked(); |
342 | 6188 |
6189 HeapRegion* next = cur->next_in_collection_set(); | |
6190 assert(cur->in_collection_set(), "bad CS"); | |
6191 cur->set_next_in_collection_set(NULL); | |
6192 cur->set_in_collection_set(false); | |
6193 | |
6194 if (cur->is_young()) { | |
6195 int index = cur->young_index_in_cset(); | |
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6196 assert(index != -1, "invariant"); |
6010
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7157073: G1: type change size_t -> uint for region counts / indexes
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|
6197 assert((uint) index < policy->young_cset_region_length(), "invariant"); |
342 | 6198 size_t words_survived = _surviving_young_words[index]; |
6199 cur->record_surv_words_in_group(words_survived); | |
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|
6200 |
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|
6201 // At this point the we have 'popped' cur from the collection set |
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6202 // (linked via next_in_collection_set()) but it is still in the |
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6203 // young list (linked via next_young_region()). Clear the |
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6204 // _next_young_region field. |
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|
6205 cur->set_next_young_region(NULL); |
342 | 6206 } else { |
6207 int index = cur->young_index_in_cset(); | |
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|
6208 assert(index == -1, "invariant"); |
342 | 6209 } |
6210 | |
6211 assert( (cur->is_young() && cur->young_index_in_cset() > -1) || | |
6212 (!cur->is_young() && cur->young_index_in_cset() == -1), | |
6213 "invariant" ); | |
6214 | |
6215 if (!cur->evacuation_failed()) { | |
4097
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|
6216 MemRegion used_mr = cur->used_region(); |
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|
6217 |
342 | 6218 // And the region is empty. |
4097
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|
6219 assert(!used_mr.is_empty(), "Should not have empty regions in a CS."); |
17736
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|
6220 pre_used += cur->used(); |
17755
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|
6221 free_region(cur, &local_free_list, false /* par */, true /* locked */); |
342 | 6222 } else { |
6223 cur->uninstall_surv_rate_group(); | |
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|
6224 if (cur->is_young()) { |
342 | 6225 cur->set_young_index_in_cset(-1); |
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|
6226 } |
342 | 6227 cur->set_not_young(); |
6228 cur->set_evacuation_failed(false); | |
4072 | 6229 // The region is now considered to be old. |
6230 _old_set.add(cur); | |
10405 | 6231 evacuation_info.increment_collectionset_used_after(cur->used()); |
342 | 6232 } |
6233 cur = next; | |
6234 } | |
6235 | |
10405 | 6236 evacuation_info.set_regions_freed(local_free_list.length()); |
342 | 6237 policy->record_max_rs_lengths(rs_lengths); |
6238 policy->cset_regions_freed(); | |
6239 | |
6240 double end_sec = os::elapsedTime(); | |
6241 double elapsed_ms = (end_sec - start_sec) * 1000.0; | |
4097
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|
6242 |
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|
6243 if (non_young) { |
342 | 6244 non_young_time_ms += elapsed_ms; |
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|
6245 } else { |
342 | 6246 young_time_ms += elapsed_ms; |
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|
6247 } |
342 | 6248 |
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brutisso
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|
6249 prepend_to_freelist(&local_free_list); |
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
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|
6250 decrement_summary_bytes(pre_used); |
6219
922993931b3d
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brutisso
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6188
diff
changeset
|
6251 policy->phase_times()->record_young_free_cset_time_ms(young_time_ms); |
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|
6252 policy->phase_times()->record_non_young_free_cset_time_ms(non_young_time_ms); |
342 | 6253 } |
6254 | |
1394
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6255 // This routine is similar to the above but does not record |
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|
6256 // any policy statistics or update free lists; we are abandoning |
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|
6257 // the current incremental collection set in preparation of a |
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|
6258 // full collection. After the full GC we will start to build up |
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|
6259 // the incremental collection set again. |
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|
6260 // This is only called when we're doing a full collection |
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|
6261 // and is immediately followed by the tearing down of the young list. |
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|
6262 |
1316cec51b4d
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|
6263 void G1CollectedHeap::abandon_collection_set(HeapRegion* cs_head) { |
1316cec51b4d
6819061: G1: eliminate serial Other times that are proportional to the collection set length
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|
6264 HeapRegion* cur = cs_head; |
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|
6265 |
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|
6266 while (cur != NULL) { |
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|
6267 HeapRegion* next = cur->next_in_collection_set(); |
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|
6268 assert(cur->in_collection_set(), "bad CS"); |
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|
6269 cur->set_next_in_collection_set(NULL); |
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|
6270 cur->set_in_collection_set(false); |
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|
6271 cur->set_young_index_in_cset(-1); |
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|
6272 cur = next; |
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|
6273 } |
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|
6274 } |
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|
6275 |
2152 | 6276 void G1CollectedHeap::set_free_regions_coming() { |
6277 if (G1ConcRegionFreeingVerbose) { | |
6278 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
6279 "setting free regions coming"); | |
6280 } | |
6281 | |
6282 assert(!free_regions_coming(), "pre-condition"); | |
6283 _free_regions_coming = true; | |
342 | 6284 } |
6285 | |
2152 | 6286 void G1CollectedHeap::reset_free_regions_coming() { |
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
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|
6287 assert(free_regions_coming(), "pre-condition"); |
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
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|
6288 |
2152 | 6289 { |
6290 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
6291 _free_regions_coming = false; | |
6292 SecondaryFreeList_lock->notify_all(); | |
6293 } | |
6294 | |
6295 if (G1ConcRegionFreeingVerbose) { | |
6296 gclog_or_tty->print_cr("G1ConcRegionFreeing [cm thread] : " | |
6297 "reset free regions coming"); | |
342 | 6298 } |
6299 } | |
6300 | |
2152 | 6301 void G1CollectedHeap::wait_while_free_regions_coming() { |
6302 // Most of the time we won't have to wait, so let's do a quick test | |
6303 // first before we take the lock. | |
6304 if (!free_regions_coming()) { | |
6305 return; | |
6306 } | |
6307 | |
6308 if (G1ConcRegionFreeingVerbose) { | |
6309 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
6310 "waiting for free regions"); | |
342 | 6311 } |
6312 | |
6313 { | |
2152 | 6314 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); |
6315 while (free_regions_coming()) { | |
6316 SecondaryFreeList_lock->wait(Mutex::_no_safepoint_check_flag); | |
342 | 6317 } |
2152 | 6318 } |
6319 | |
6320 if (G1ConcRegionFreeingVerbose) { | |
6321 gclog_or_tty->print_cr("G1ConcRegionFreeing [other] : " | |
6322 "done waiting for free regions"); | |
6323 } | |
342 | 6324 } |
6325 | |
6326 void G1CollectedHeap::set_region_short_lived_locked(HeapRegion* hr) { | |
6327 assert(heap_lock_held_for_gc(), | |
6328 "the heap lock should already be held by or for this thread"); | |
6329 _young_list->push_region(hr); | |
6330 } | |
6331 | |
6332 class NoYoungRegionsClosure: public HeapRegionClosure { | |
6333 private: | |
6334 bool _success; | |
6335 public: | |
6336 NoYoungRegionsClosure() : _success(true) { } | |
6337 bool doHeapRegion(HeapRegion* r) { | |
6338 if (r->is_young()) { | |
6339 gclog_or_tty->print_cr("Region ["PTR_FORMAT", "PTR_FORMAT") tagged as young", | |
6340 r->bottom(), r->end()); | |
6341 _success = false; | |
6342 } | |
6343 return false; | |
6344 } | |
6345 bool success() { return _success; } | |
6346 }; | |
6347 | |
1394
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|
6348 bool G1CollectedHeap::check_young_list_empty(bool check_heap, bool check_sample) { |
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|
6349 bool ret = _young_list->check_list_empty(check_sample); |
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|
6350 |
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|
6351 if (check_heap) { |
342 | 6352 NoYoungRegionsClosure closure; |
6353 heap_region_iterate(&closure); | |
6354 ret = ret && closure.success(); | |
6355 } | |
6356 | |
6357 return ret; | |
6358 } | |
6359 | |
4072 | 6360 class TearDownRegionSetsClosure : public HeapRegionClosure { |
6361 private: | |
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|
6362 HeapRegionSet *_old_set; |
2152 | 6363 |
342 | 6364 public: |
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|
6365 TearDownRegionSetsClosure(HeapRegionSet* old_set) : _old_set(old_set) { } |
2152 | 6366 |
342 | 6367 bool doHeapRegion(HeapRegion* r) { |
4072 | 6368 if (r->is_empty()) { |
6369 // We ignore empty regions, we'll empty the free list afterwards | |
6370 } else if (r->is_young()) { | |
6371 // We ignore young regions, we'll empty the young list afterwards | |
6372 } else if (r->isHumongous()) { | |
6373 // We ignore humongous regions, we're not tearing down the | |
6374 // humongous region set | |
342 | 6375 } else { |
4072 | 6376 // The rest should be old |
6377 _old_set->remove(r); | |
342 | 6378 } |
6379 return false; | |
6380 } | |
6381 | |
4072 | 6382 ~TearDownRegionSetsClosure() { |
6383 assert(_old_set->is_empty(), "post-condition"); | |
2152 | 6384 } |
342 | 6385 }; |
6386 | |
4072 | 6387 void G1CollectedHeap::tear_down_region_sets(bool free_list_only) { |
6388 assert_at_safepoint(true /* should_be_vm_thread */); | |
6389 | |
6390 if (!free_list_only) { | |
6391 TearDownRegionSetsClosure cl(&_old_set); | |
6392 heap_region_iterate(&cl); | |
6393 | |
17764 | 6394 // Note that emptying the _young_list is postponed and instead done as |
6395 // the first step when rebuilding the regions sets again. The reason for | |
6396 // this is that during a full GC string deduplication needs to know if | |
6397 // a collected region was young or old when the full GC was initiated. | |
4072 | 6398 } |
6399 _free_list.remove_all(); | |
6400 } | |
6401 | |
6402 class RebuildRegionSetsClosure : public HeapRegionClosure { | |
6403 private: | |
6404 bool _free_list_only; | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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17727
diff
changeset
|
6405 HeapRegionSet* _old_set; |
4072 | 6406 FreeRegionList* _free_list; |
6407 size_t _total_used; | |
6408 | |
6409 public: | |
6410 RebuildRegionSetsClosure(bool free_list_only, | |
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
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17727
diff
changeset
|
6411 HeapRegionSet* old_set, FreeRegionList* free_list) : |
4072 | 6412 _free_list_only(free_list_only), |
6413 _old_set(old_set), _free_list(free_list), _total_used(0) { | |
6414 assert(_free_list->is_empty(), "pre-condition"); | |
6415 if (!free_list_only) { | |
6416 assert(_old_set->is_empty(), "pre-condition"); | |
6417 } | |
6418 } | |
6419 | |
6420 bool doHeapRegion(HeapRegion* r) { | |
6421 if (r->continuesHumongous()) { | |
6422 return false; | |
6423 } | |
6424 | |
6425 if (r->is_empty()) { | |
6426 // Add free regions to the free list | |
6427 _free_list->add_as_tail(r); | |
6428 } else if (!_free_list_only) { | |
6429 assert(!r->is_young(), "we should not come across young regions"); | |
6430 | |
6431 if (r->isHumongous()) { | |
6432 // We ignore humongous regions, we left the humongous set unchanged | |
6433 } else { | |
6434 // The rest should be old, add them to the old set | |
6435 _old_set->add(r); | |
6436 } | |
6437 _total_used += r->used(); | |
6438 } | |
6439 | |
6440 return false; | |
6441 } | |
6442 | |
6443 size_t total_used() { | |
6444 return _total_used; | |
6445 } | |
6446 }; | |
6447 | |
6448 void G1CollectedHeap::rebuild_region_sets(bool free_list_only) { | |
6449 assert_at_safepoint(true /* should_be_vm_thread */); | |
6450 | |
17764 | 6451 if (!free_list_only) { |
6452 _young_list->empty_list(); | |
6453 } | |
6454 | |
4072 | 6455 RebuildRegionSetsClosure cl(free_list_only, &_old_set, &_free_list); |
6456 heap_region_iterate(&cl); | |
6457 | |
6458 if (!free_list_only) { | |
6459 _summary_bytes_used = cl.total_used(); | |
6460 } | |
6461 assert(_summary_bytes_used == recalculate_used(), | |
6462 err_msg("inconsistent _summary_bytes_used, " | |
6463 "value: "SIZE_FORMAT" recalculated: "SIZE_FORMAT, | |
6464 _summary_bytes_used, recalculate_used())); | |
342 | 6465 } |
6466 | |
6467 void G1CollectedHeap::set_refine_cte_cl_concurrency(bool concurrent) { | |
6468 _refine_cte_cl->set_concurrent(concurrent); | |
6469 } | |
6470 | |
6471 bool G1CollectedHeap::is_in_closed_subset(const void* p) const { | |
6472 HeapRegion* hr = heap_region_containing(p); | |
6473 if (hr == NULL) { | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
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6629
diff
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|
6474 return false; |
342 | 6475 } else { |
6476 return hr->is_in(p); | |
6477 } | |
6478 } | |
2152 | 6479 |
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|
6480 // Methods for the mutator alloc region |
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7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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|
6481 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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|
6482 HeapRegion* G1CollectedHeap::new_mutator_alloc_region(size_t word_size, |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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diff
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|
6483 bool force) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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diff
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|
6484 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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|
6485 assert(!force || g1_policy()->can_expand_young_list(), |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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diff
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|
6486 "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
|
6487 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
|
6488 if (force || !young_list_full) { |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6489 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
|
6490 false /* is_old */, |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
2432
diff
changeset
|
6491 false /* do_expand */); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
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diff
changeset
|
6492 if (new_alloc_region != NULL) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
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diff
changeset
|
6493 set_region_short_lived_locked(new_alloc_region); |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6494 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Eden, young_list_full); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
2432
diff
changeset
|
6495 return new_alloc_region; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
2432
diff
changeset
|
6496 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
2432
diff
changeset
|
6497 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
2432
diff
changeset
|
6498 return NULL; |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
2432
diff
changeset
|
6499 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
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diff
changeset
|
6500 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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diff
changeset
|
6501 void G1CollectedHeap::retire_mutator_alloc_region(HeapRegion* alloc_region, |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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diff
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|
6502 size_t allocated_bytes) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
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diff
changeset
|
6503 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
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diff
changeset
|
6504 assert(alloc_region->is_young(), "all mutator alloc regions should be young"); |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
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diff
changeset
|
6505 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
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diff
changeset
|
6506 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
|
6507 _summary_bytes_used += allocated_bytes; |
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3777
diff
changeset
|
6508 _hr_printer.retire(alloc_region); |
3980
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6509 // 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
|
6510 // 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
|
6511 // used space has been recored in _summary_bytes_used. |
8229bd737950
7075646: G1: fix inconsistencies in the monitoring data
tonyp
parents:
3979
diff
changeset
|
6512 g1mm()->update_eden_size(); |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6513 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
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diff
changeset
|
6514 |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
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parents:
2432
diff
changeset
|
6515 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
|
6516 bool force) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6517 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
|
6518 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6519 |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6520 void G1CollectedHeap::set_par_threads() { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6521 // 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
|
6522 // in the workgroup. |
4711 | 6523 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
|
6524 uint n_workers = workers()->active_workers(); |
4711 | 6525 assert(UseDynamicNumberOfGCThreads || |
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6526 n_workers == workers()->total_workers(), |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6527 "Otherwise should be using the total number of workers"); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6528 if (n_workers == 0) { |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6529 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
|
6530 n_workers = ParallelGCThreads; |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6531 workers()->set_active_workers(n_workers); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6532 } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6533 set_par_threads(n_workers); |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6534 } |
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4090
diff
changeset
|
6535 |
2433
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6536 void MutatorAllocRegion::retire_region(HeapRegion* alloc_region, |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6537 size_t allocated_bytes) { |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6538 _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
|
6539 } |
abdfc822206f
7023069: G1: Introduce symmetric locking in the slow allocation path
tonyp
parents:
2432
diff
changeset
|
6540 |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6541 // Methods for the GC alloc regions |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
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3824
diff
changeset
|
6542 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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parents:
3824
diff
changeset
|
6543 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
|
6544 uint count, |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6545 GCAllocPurpose ap) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
parents:
3824
diff
changeset
|
6546 assert(FreeList_lock->owned_by_self(), "pre-condition"); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
diff
changeset
|
6547 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
diff
changeset
|
6548 if (count < g1_policy()->max_regions(ap)) { |
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
parents:
17759
diff
changeset
|
6549 bool survivor = (ap == GCAllocForSurvived); |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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parents:
3824
diff
changeset
|
6550 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
|
6551 !survivor, |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
diff
changeset
|
6552 true /* do_expand */); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
diff
changeset
|
6553 if (new_alloc_region != NULL) { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
diff
changeset
|
6554 // 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
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3824
diff
changeset
|
6555 // 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
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3824
diff
changeset
|
6556 // for survivors too. |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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parents:
3824
diff
changeset
|
6557 new_alloc_region->set_saved_mark(); |
17773
8ee855b4e667
8036025: Sort the freelist in order to shrink the heap
jwilhelm
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17759
diff
changeset
|
6558 if (survivor) { |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
diff
changeset
|
6559 new_alloc_region->set_survivor(); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
diff
changeset
|
6560 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Survivor); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
diff
changeset
|
6561 } else { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
diff
changeset
|
6562 _hr_printer.alloc(new_alloc_region, G1HRPrinter::Old); |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
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3824
diff
changeset
|
6563 } |
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4785
diff
changeset
|
6564 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
|
6565 new_alloc_region->note_start_of_copying(during_im); |
3830
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
diff
changeset
|
6566 return new_alloc_region; |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
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3824
diff
changeset
|
6567 } else { |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
diff
changeset
|
6568 g1_policy()->note_alloc_region_limit_reached(ap); |
f44782f04dd4
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tonyp
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3824
diff
changeset
|
6569 } |
f44782f04dd4
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3824
diff
changeset
|
6570 } |
f44782f04dd4
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3824
diff
changeset
|
6571 return NULL; |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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parents:
3824
diff
changeset
|
6572 } |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
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3824
diff
changeset
|
6573 |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
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3824
diff
changeset
|
6574 void G1CollectedHeap::retire_gc_alloc_region(HeapRegion* alloc_region, |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
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diff
changeset
|
6575 size_t allocated_bytes, |
f44782f04dd4
7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally
tonyp
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diff
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|
6576 GCAllocPurpose ap) { |
4787
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6577 bool during_im = g1_policy()->during_initial_mark_pause(); |
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6578 alloc_region->note_end_of_copying(during_im); |
3830
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|
6579 g1_policy()->record_bytes_copied_during_gc(allocated_bytes); |
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6580 if (ap == GCAllocForSurvived) { |
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|
6581 young_list()->add_survivor_region(alloc_region); |
4072 | 6582 } else { |
6583 _old_set.add(alloc_region); | |
3830
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|
6584 } |
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|
6585 _hr_printer.retire(alloc_region); |
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|
6586 } |
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|
6587 |
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|
6588 HeapRegion* SurvivorGCAllocRegion::allocate_new_region(size_t word_size, |
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6589 bool force) { |
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|
6590 assert(!force, "not supported for GC alloc regions"); |
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6591 return _g1h->new_gc_alloc_region(word_size, count(), GCAllocForSurvived); |
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|
6592 } |
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|
6593 |
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6594 void SurvivorGCAllocRegion::retire_region(HeapRegion* alloc_region, |
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6595 size_t allocated_bytes) { |
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6596 _g1h->retire_gc_alloc_region(alloc_region, allocated_bytes, |
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|
6597 GCAllocForSurvived); |
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|
6598 } |
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|
6599 |
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6600 HeapRegion* OldGCAllocRegion::allocate_new_region(size_t word_size, |
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6601 bool force) { |
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6602 assert(!force, "not supported for GC alloc regions"); |
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6603 return _g1h->new_gc_alloc_region(word_size, count(), GCAllocForTenured); |
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|
6604 } |
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6605 |
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6606 void OldGCAllocRegion::retire_region(HeapRegion* alloc_region, |
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|
6607 size_t allocated_bytes) { |
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6608 _g1h->retire_gc_alloc_region(alloc_region, allocated_bytes, |
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6609 GCAllocForTenured); |
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|
6610 } |
2433
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|
6611 // Heap region set verification |
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|
6612 |
2152 | 6613 class VerifyRegionListsClosure : public HeapRegionClosure { |
6614 private: | |
17736
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6615 HeapRegionSet* _old_set; |
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6616 HeapRegionSet* _humongous_set; |
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6617 FreeRegionList* _free_list; |
2152 | 6618 |
6619 public: | |
17736
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6620 HeapRegionSetCount _old_count; |
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6621 HeapRegionSetCount _humongous_count; |
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6622 HeapRegionSetCount _free_count; |
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6623 |
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6624 VerifyRegionListsClosure(HeapRegionSet* old_set, |
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6625 HeapRegionSet* humongous_set, |
2152 | 6626 FreeRegionList* free_list) : |
17736
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6627 _old_set(old_set), _humongous_set(humongous_set), _free_list(free_list), |
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6628 _old_count(), _humongous_count(), _free_count(){ } |
2152 | 6629 |
6630 bool doHeapRegion(HeapRegion* hr) { | |
6631 if (hr->continuesHumongous()) { | |
6632 return false; | |
6633 } | |
6634 | |
6635 if (hr->is_young()) { | |
6636 // TODO | |
6637 } else if (hr->startsHumongous()) { | |
17736
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6638 assert(hr->containing_set() == _humongous_set, err_msg("Heap region %u is starts humongous but not in humongous set.", hr->region_num())); |
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6639 _humongous_count.increment(1u, hr->capacity()); |
2152 | 6640 } else if (hr->is_empty()) { |
17736
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6641 assert(hr->containing_set() == _free_list, err_msg("Heap region %u is empty but not on the free list.", hr->region_num())); |
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6642 _free_count.increment(1u, hr->capacity()); |
4072 | 6643 } else { |
17736
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6644 assert(hr->containing_set() == _old_set, err_msg("Heap region %u is old but not in the old set.", hr->region_num())); |
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6645 _old_count.increment(1u, hr->capacity()); |
2152 | 6646 } |
6647 return false; | |
6648 } | |
17736
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|
6649 |
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6650 void verify_counts(HeapRegionSet* old_set, HeapRegionSet* humongous_set, FreeRegionList* free_list) { |
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6651 guarantee(old_set->length() == _old_count.length(), err_msg("Old set count mismatch. Expected %u, actual %u.", old_set->length(), _old_count.length())); |
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6652 guarantee(old_set->total_capacity_bytes() == _old_count.capacity(), err_msg("Old set capacity mismatch. Expected " SIZE_FORMAT ", actual " SIZE_FORMAT, |
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|
6653 old_set->total_capacity_bytes(), _old_count.capacity())); |
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|
6654 |
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|
6655 guarantee(humongous_set->length() == _humongous_count.length(), err_msg("Hum set count mismatch. Expected %u, actual %u.", humongous_set->length(), _humongous_count.length())); |
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|
6656 guarantee(humongous_set->total_capacity_bytes() == _humongous_count.capacity(), err_msg("Hum set capacity mismatch. Expected " SIZE_FORMAT ", actual " SIZE_FORMAT, |
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|
6657 humongous_set->total_capacity_bytes(), _humongous_count.capacity())); |
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|
6658 |
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|
6659 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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|
6660 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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|
6661 free_list->total_capacity_bytes(), _free_count.capacity())); |
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|
6662 } |
2152 | 6663 }; |
6664 | |
6010
720b6a76dd9d
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6008
diff
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|
6665 HeapRegion* G1CollectedHeap::new_heap_region(uint hrs_index, |
3766 | 6666 HeapWord* bottom) { |
6667 HeapWord* end = bottom + HeapRegion::GrainWords; | |
6668 MemRegion mr(bottom, end); | |
6669 assert(_g1_reserved.contains(mr), "invariant"); | |
6670 // This might return NULL if the allocation fails | |
6754
8fbf05030e24
7016955: G1: remove the is_zeroed parameter from the HeapRegion constructor
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6752
diff
changeset
|
6671 return new HeapRegion(hrs_index, _bot_shared, mr); |
3766 | 6672 } |
6673 | |
2152 | 6674 void G1CollectedHeap::verify_region_sets() { |
6675 assert_heap_locked_or_at_safepoint(true /* should_be_vm_thread */); | |
6676 | |
6677 // First, check the explicit lists. | |
17736
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|
6678 _free_list.verify_list(); |
2152 | 6679 { |
6680 // Given that a concurrent operation might be adding regions to | |
6681 // the secondary free list we have to take the lock before | |
6682 // verifying it. | |
6683 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
17736
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|
6684 _secondary_free_list.verify_list(); |
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|
6685 } |
2152 | 6686 |
6687 // If a concurrent region freeing operation is in progress it will | |
6688 // be difficult to correctly attributed any free regions we come | |
6689 // across to the correct free list given that they might belong to | |
6690 // one of several (free_list, secondary_free_list, any local lists, | |
6691 // etc.). So, if that's the case we will skip the rest of the | |
6692 // verification operation. Alternatively, waiting for the concurrent | |
6693 // operation to complete will have a non-trivial effect on the GC's | |
6694 // operation (no concurrent operation will last longer than the | |
6695 // interval between two calls to verification) and it might hide | |
6696 // any issues that we would like to catch during testing. | |
6697 if (free_regions_coming()) { | |
6698 return; | |
6699 } | |
6700 | |
2361 | 6701 // Make sure we append the secondary_free_list on the free_list so |
6702 // that all free regions we will come across can be safely | |
6703 // attributed to the free_list. | |
6704 append_secondary_free_list_if_not_empty_with_lock(); | |
2152 | 6705 |
6706 // Finally, make sure that the region accounting in the lists is | |
6707 // consistent with what we see in the heap. | |
6708 | |
4072 | 6709 VerifyRegionListsClosure cl(&_old_set, &_humongous_set, &_free_list); |
2152 | 6710 heap_region_iterate(&cl); |
17736
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|
6711 cl.verify_counts(&_old_set, &_humongous_set, &_free_list); |
342 | 6712 } |
12080 | 6713 |
6714 // Optimized nmethod scanning | |
6715 | |
6716 class RegisterNMethodOopClosure: public OopClosure { | |
6717 G1CollectedHeap* _g1h; | |
6718 nmethod* _nm; | |
6719 | |
6720 template <class T> void do_oop_work(T* p) { | |
6721 T heap_oop = oopDesc::load_heap_oop(p); | |
6722 if (!oopDesc::is_null(heap_oop)) { | |
6723 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
6724 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
13062
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|
6725 assert(!hr->continuesHumongous(), |
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|
6726 err_msg("trying to add code root "PTR_FORMAT" in continuation of humongous region "HR_FORMAT |
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|
6727 " starting at "HR_FORMAT, |
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|
6728 _nm, HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()))); |
12080 | 6729 |
6730 // HeapRegion::add_strong_code_root() avoids adding duplicate | |
6731 // entries but having duplicates is OK since we "mark" nmethods | |
6732 // as visited when we scan the strong code root lists during the GC. | |
6733 hr->add_strong_code_root(_nm); | |
13062
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|
6734 assert(hr->rem_set()->strong_code_roots_list_contains(_nm), |
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|
6735 err_msg("failed to add code root "PTR_FORMAT" to remembered set of region "HR_FORMAT, |
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|
6736 _nm, HR_FORMAT_PARAMS(hr))); |
12080 | 6737 } |
6738 } | |
6739 | |
6740 public: | |
6741 RegisterNMethodOopClosure(G1CollectedHeap* g1h, nmethod* nm) : | |
6742 _g1h(g1h), _nm(nm) {} | |
6743 | |
6744 void do_oop(oop* p) { do_oop_work(p); } | |
6745 void do_oop(narrowOop* p) { do_oop_work(p); } | |
6746 }; | |
6747 | |
6748 class UnregisterNMethodOopClosure: public OopClosure { | |
6749 G1CollectedHeap* _g1h; | |
6750 nmethod* _nm; | |
6751 | |
6752 template <class T> void do_oop_work(T* p) { | |
6753 T heap_oop = oopDesc::load_heap_oop(p); | |
6754 if (!oopDesc::is_null(heap_oop)) { | |
6755 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
6756 HeapRegion* hr = _g1h->heap_region_containing(obj); | |
13062
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|
6757 assert(!hr->continuesHumongous(), |
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|
6758 err_msg("trying to remove code root "PTR_FORMAT" in continuation of humongous region "HR_FORMAT |
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|
6759 " starting at "HR_FORMAT, |
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|
6760 _nm, HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()))); |
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|
6761 |
12080 | 6762 hr->remove_strong_code_root(_nm); |
13062
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|
6763 assert(!hr->rem_set()->strong_code_roots_list_contains(_nm), |
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|
6764 err_msg("failed to remove code root "PTR_FORMAT" of region "HR_FORMAT, |
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|
6765 _nm, HR_FORMAT_PARAMS(hr))); |
12080 | 6766 } |
6767 } | |
6768 | |
6769 public: | |
6770 UnregisterNMethodOopClosure(G1CollectedHeap* g1h, nmethod* nm) : | |
6771 _g1h(g1h), _nm(nm) {} | |
6772 | |
6773 void do_oop(oop* p) { do_oop_work(p); } | |
6774 void do_oop(narrowOop* p) { do_oop_work(p); } | |
6775 }; | |
6776 | |
6777 void G1CollectedHeap::register_nmethod(nmethod* nm) { | |
6778 CollectedHeap::register_nmethod(nm); | |
6779 | |
6780 guarantee(nm != NULL, "sanity"); | |
6781 RegisterNMethodOopClosure reg_cl(this, nm); | |
6782 nm->oops_do(®_cl); | |
6783 } | |
6784 | |
6785 void G1CollectedHeap::unregister_nmethod(nmethod* nm) { | |
6786 CollectedHeap::unregister_nmethod(nm); | |
6787 | |
6788 guarantee(nm != NULL, "sanity"); | |
6789 UnregisterNMethodOopClosure reg_cl(this, nm); | |
6790 nm->oops_do(®_cl, true); | |
6791 } | |
6792 | |
6793 class MigrateCodeRootsHeapRegionClosure: public HeapRegionClosure { | |
6794 public: | |
6795 bool doHeapRegion(HeapRegion *hr) { | |
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6796 assert(!hr->isHumongous(), |
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6797 err_msg("humongous region "HR_FORMAT" should not have been added to collection set", |
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6798 HR_FORMAT_PARAMS(hr))); |
12080 | 6799 hr->migrate_strong_code_roots(); |
6800 return false; | |
6801 } | |
6802 }; | |
6803 | |
6804 void G1CollectedHeap::migrate_strong_code_roots() { | |
6805 MigrateCodeRootsHeapRegionClosure cl; | |
6806 double migrate_start = os::elapsedTime(); | |
6807 collection_set_iterate(&cl); | |
6808 double migration_time_ms = (os::elapsedTime() - migrate_start) * 1000.0; | |
6809 g1_policy()->phase_times()->record_strong_code_root_migration_time(migration_time_ms); | |
6810 } | |
6811 | |
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6812 void G1CollectedHeap::purge_code_root_memory() { |
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6813 double purge_start = os::elapsedTime(); |
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6814 G1CodeRootSet::purge_chunks(G1CodeRootsChunkCacheKeepPercent); |
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6815 double purge_time_ms = (os::elapsedTime() - purge_start) * 1000.0; |
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6816 g1_policy()->phase_times()->record_strong_code_root_purge_time(purge_time_ms); |
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6817 } |
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6818 |
12080 | 6819 // Mark all the code roots that point into regions *not* in the |
6820 // collection set. | |
6821 // | |
6822 // Note we do not want to use a "marking" CodeBlobToOopClosure while | |
6823 // walking the the code roots lists of regions not in the collection | |
6824 // set. Suppose we have an nmethod (M) that points to objects in two | |
6825 // separate regions - one in the collection set (R1) and one not (R2). | |
6826 // Using a "marking" CodeBlobToOopClosure here would result in "marking" | |
6827 // nmethod M when walking the code roots for R1. When we come to scan | |
6828 // the code roots for R2, we would see that M is already marked and it | |
6829 // would be skipped and the objects in R2 that are referenced from M | |
6830 // would not be evacuated. | |
6831 | |
6832 class MarkStrongCodeRootCodeBlobClosure: public CodeBlobClosure { | |
6833 | |
6834 class MarkStrongCodeRootOopClosure: public OopClosure { | |
6835 ConcurrentMark* _cm; | |
6836 HeapRegion* _hr; | |
6837 uint _worker_id; | |
6838 | |
6839 template <class T> void do_oop_work(T* p) { | |
6840 T heap_oop = oopDesc::load_heap_oop(p); | |
6841 if (!oopDesc::is_null(heap_oop)) { | |
6842 oop obj = oopDesc::decode_heap_oop_not_null(heap_oop); | |
6843 // Only mark objects in the region (which is assumed | |
6844 // to be not in the collection set). | |
6845 if (_hr->is_in(obj)) { | |
6846 _cm->grayRoot(obj, (size_t) obj->size(), _worker_id); | |
6847 } | |
6848 } | |
6849 } | |
6850 | |
6851 public: | |
6852 MarkStrongCodeRootOopClosure(ConcurrentMark* cm, HeapRegion* hr, uint worker_id) : | |
6853 _cm(cm), _hr(hr), _worker_id(worker_id) { | |
6854 assert(!_hr->in_collection_set(), "sanity"); | |
6855 } | |
6856 | |
6857 void do_oop(narrowOop* p) { do_oop_work(p); } | |
6858 void do_oop(oop* p) { do_oop_work(p); } | |
6859 }; | |
6860 | |
6861 MarkStrongCodeRootOopClosure _oop_cl; | |
6862 | |
6863 public: | |
6864 MarkStrongCodeRootCodeBlobClosure(ConcurrentMark* cm, HeapRegion* hr, uint worker_id): | |
6865 _oop_cl(cm, hr, worker_id) {} | |
6866 | |
6867 void do_code_blob(CodeBlob* cb) { | |
6868 nmethod* nm = (cb == NULL) ? NULL : cb->as_nmethod_or_null(); | |
6869 if (nm != NULL) { | |
6870 nm->oops_do(&_oop_cl); | |
6871 } | |
6872 } | |
6873 }; | |
6874 | |
6875 class MarkStrongCodeRootsHRClosure: public HeapRegionClosure { | |
6876 G1CollectedHeap* _g1h; | |
6877 uint _worker_id; | |
6878 | |
6879 public: | |
6880 MarkStrongCodeRootsHRClosure(G1CollectedHeap* g1h, uint worker_id) : | |
6881 _g1h(g1h), _worker_id(worker_id) {} | |
6882 | |
6883 bool doHeapRegion(HeapRegion *hr) { | |
6884 HeapRegionRemSet* hrrs = hr->rem_set(); | |
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6885 if (hr->continuesHumongous()) { |
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6886 // Code roots should never be attached to a continuation of a humongous region |
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6887 assert(hrrs->strong_code_roots_list_length() == 0, |
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6888 err_msg("code roots should never be attached to continuations of humongous region "HR_FORMAT |
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6889 " starting at "HR_FORMAT", but has "SIZE_FORMAT, |
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6890 HR_FORMAT_PARAMS(hr), HR_FORMAT_PARAMS(hr->humongous_start_region()), |
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6891 hrrs->strong_code_roots_list_length())); |
12080 | 6892 return false; |
6893 } | |
6894 | |
6895 if (hr->in_collection_set()) { | |
6896 // Don't mark code roots into regions in the collection set here. | |
6897 // They will be marked when we scan them. | |
6898 return false; | |
6899 } | |
6900 | |
6901 MarkStrongCodeRootCodeBlobClosure cb_cl(_g1h->concurrent_mark(), hr, _worker_id); | |
6902 hr->strong_code_roots_do(&cb_cl); | |
6903 return false; | |
6904 } | |
6905 }; | |
6906 | |
6907 void G1CollectedHeap::mark_strong_code_roots(uint worker_id) { | |
6908 MarkStrongCodeRootsHRClosure cl(this, worker_id); | |
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6909 if (G1CollectedHeap::use_parallel_gc_threads()) { |
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6910 heap_region_par_iterate_chunked(&cl, |
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6911 worker_id, |
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6912 workers()->active_workers(), |
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6913 HeapRegion::ParMarkRootClaimValue); |
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6914 } else { |
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6915 heap_region_iterate(&cl); |
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6916 } |
12080 | 6917 } |
6918 | |
6919 class RebuildStrongCodeRootClosure: public CodeBlobClosure { | |
6920 G1CollectedHeap* _g1h; | |
6921 | |
6922 public: | |
6923 RebuildStrongCodeRootClosure(G1CollectedHeap* g1h) : | |
6924 _g1h(g1h) {} | |
6925 | |
6926 void do_code_blob(CodeBlob* cb) { | |
6927 nmethod* nm = (cb != NULL) ? cb->as_nmethod_or_null() : NULL; | |
6928 if (nm == NULL) { | |
6929 return; | |
6930 } | |
6931 | |
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6932 if (ScavengeRootsInCode) { |
12080 | 6933 _g1h->register_nmethod(nm); |
6934 } | |
6935 } | |
6936 }; | |
6937 | |
6938 void G1CollectedHeap::rebuild_strong_code_roots() { | |
6939 RebuildStrongCodeRootClosure blob_cl(this); | |
6940 CodeCache::blobs_do(&blob_cl); | |
6941 } |